Mortex Suntherm heu1 Guide

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USERS INFORMATION MANUAL

Horizontal Fan Coil Models:

HEU1 - DX Cooling w/ Electric Heat, Uncased HEU2 - DX Cooling w/ Hot Water Heat, Uncased

HEC1 – DX Cooling w/ Electric Heat, Cased HEC2 – DX Cooling w/ Hot Water Heat, Cased

HEU3 – Chilled Water Cooling w/Electric Heat, Uncased-2P HEU4 – Chilled Water Cool w/Hot Water Heat, Uncased-4P

HEC3 – Chilled Water Cooling w/ Electric Heat, Cased-4P HEC4 – Chilled Water Cool w/Hot Water Heat, Cased-4P

LIST OF SECTIONS – USERS INFORMATION MANUAL

1 – General 1 4 – Start Up & Shutdown Instructions 5

2 – Safety 2 5 – Owner Maintenance 5

3 – Owners Information & Seasonal Information 3

LIST OF SECTIONS – SERVICE AND MAINTENANCE MANUAL

1 – Safety 7 5 – Trouble Shooting 14

2 – Fan Coil Unit Maintenance 8 6 – Accessories Parts 16

3 – Fan Coil Unit Controls 9 7 – Blower Performance 17

4 – Sequence of Operation 12 8 – Replacement Parts 19

LIST OF FIGURES

1 – Fan Coil Unit Visual Examination Check Points 4 14 – Adjustable Time Delay Relay (TDR) Terminals 14

2 – Home Owner / Users Cleaning Points 5 15 – Constant Torque Blower Motor Terminals 14

3 – Ceiling Access Panel Air Filter Location 6 16 – Electric Heater Contactor Terminal Designations 15

4 – Replacement Standard 1” Air Filter Drawing 6 17 – Blower Assembly Removal 15

5 – Optional Return Air Filter Grille 6 18 – Blower Motor Retainer Clip Removal 16

6 – No Electric Heat Control Box 8 19 – HE1 & HE3 18,19,24 Electric Heat Replacement Part Schematic19

7 – Hydronic Heat Control Box 8 20 – HE1 & HE3 25,30.31 Electric Heat Replacement Part Schematic20

8 – Electric Heat Control Box 8 21 – HE1 & HE3 34, 35 Electric Heat Replacement Part Schematic 21

9 – Blower Assembly & Mounting Screw Location 8 22 – HE1 & HE3 35, 36 Electric Heat Replacement Part Schematic 22

10 – ICM AY1015 Hydronic Controls for C.T. Motors 10 23 – HE2 & HE4 18,19,24 Hydronic Ht Replacement Part Schematic 23

11 – Component Locations – Hydronic Heat 12 24 – HE2 & HE4 25,30,31 Hydronic Ht Replacement Parts Schematic24

12 – Component Locations – Electric Heat 12 25 – HE2 & HE4 34, 35 Hydronic Heat Replacement Parts Schematic25

13 – Blower Motor Speed Isolation Relay (Electric & No Heat) 13 26 – HE2 & HE4 35, 36 Hydronic Heat Replacement Parts Schematic26

LIST OF TABLES

1– Constant Torque Motor Terminals 14 9 – HE1 / HE3 – 18, 19, 24 - Electric Heat Repair Parts List 19

2– 208/240 Volt Blower Motor Tested FLA 15 10 – HE1 / HE3 – 25, 30, 31 - Electric Heat Replacement Parts List 20

3– 115 Volt Blower Motor Tested FLA 15 10 – HE1 / HE3 – 34, 35 - Electric Heat Replacement Parts List 21

4– Accessory Parts List 16 10 – HE1 / HE3 – 36, 37 - Electric Heat Replacement Parts List 22

5 – HE1/HE3 Blower Performance Chart – CFM Data w/ CT Motor 17 11 – HE2 / HE4 – 18, 19, 24 - Hydronic Heat Replacement Parts List 23

6 – HE1/HE3 Blower Performance Chart – AMP Data w/ CT Motor 17 12 – HE2 / HE4 – 25, 30, 31 - Hydronic Heat Replacement Parts List 24

7 – HE2/HE4 Blower Performance Chart – CFM Data w/ CT 18 13 – HE2 / HE4 – 34, 35 - Hydronic Heat Replacement Parts List 25

8 – HE2/HE4 Blower Performance Chart – AMP Data w/ CT 18 14 – HE2 / HE4 – 35, 36 - Hydronic Heat Replacement Parts List 26

CONTACT INFORMATION

501 Terminal Rd www.mortx.com

Fort Worth, TX 76106

SECTION I: GENERAL

The following list includes important facts and information regarding

the air handler and its inclusions.

1. Fan Coil is rated at 240 volts AC at 60 Hertz for electric heat

models or 120 volts AC at 60 Hertz for hydronic models.

2. Fan Coil is not designed to be operated on a 50 HZ supply.

3. All Fan Coil Units are equipped with a blower for A/C or Heat

Pump operation.

4. Fan Coil models are designed for horizontal applications only.

5. This Fan Coil Unit must not be operated without the control

box cover installed.

NOTE: This fan coil unit and its components are listed as a

combination AC or Heat Pump system by ETL for sale in the United

States and Canada.

USERS MUST READ ALL INSTRUCTIONS IN THIS MANUAL AND

THIS MANUAL MUST BE SAVED FOR FUTURE REFERENCE

FIRE OR ELECTRICAL HAZARD

Failure to follow the safety warnings exactly could result in

serious injury, death, or property damage.

A fire or electrical hazard may result causing property

damage, personal injury or loss of life.

Do not store or use gasoline or other flammable vapors and

liquids in the vicinity of this or any other appliance

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SECTION II: SAFETY

This is a safety alert symbol. When you see this symbol

on labels or in manuals; be alert to the potential for personal

injury.

Understand and pay particular attention to the signal words

DANGER, WARNING, or CAUTION.

DANGER: indicates an imminently hazardous situation, which

if not avoided, will result in death or serious injury.

WARNING: indicates a potentially hazardous situation, which if

not avoided, could result in death or serious injury.

CAUTION: indicated a potentially hazardous situation, which if

not avoided, may result in minor or moderate injury. It is also

used to alert against unsafe practices and hazards involving

property damage.

SAFETY REQUIREMENTS

1. This fan coil unit must be kept clear and free of

combustible materials, gasoline and other flammable

vapors and liquids.

2. Insulating materials may be combustible. The fan coil unit

must be kept free and clear of insulating materials. The air

handler area must be examined when installed in an

insulated space or when insulation is added to be sure that

the insulation material has been kept away from the

appliance.

3. Follow the instructions exactly as shown in Startup and

Shutdown Section in this manual to properly Startup or

Shutdown this appliance.

4. If overheating occurs, turn off the power to the appliance

and contact a qualified contractor, installer, or service

agency.

5. NEVER - Store flammable materials of any kind near

your appliance. Gasoline, solvents and other volatile

liquids should be stored only in approved containers

outside the home. These materials vaporize easily and are

extremely dangerous.

6. NEVER – Store cleaning materials such as bleaches,

detergents, powder cleaners, etc. near the appliance.

These chemicals can cause corrosion of the fan coil unit

sheet metal and the electric heaters, the blower and the

electrical controls.

7. NEVER – Use the area around the appliance as a storage

area for items which could block or obstruct the normal

air flow to the air handler or the space around the

appliance. The flow of air is required for safe and proper

operation. Never block or obstruct air openings used for

ventilation and cooling of the air handler electrical

components.

8. Refer to the appliance rating plate for the fan coil unit

model number, for the operating specifications for safe

operation.

9. Provide clearances for servicing ensuring service access is

allowed for the control box, electric elements and the

blower.

10.Failure to carefully read and follow all instructions in this

manual can result in malfunction of the fan coil unit

which can cause death, personal injury, and/or property

damage.

11.If the fan coil unit is installed in a residential garage it

must be installed so that the electric heaters are located

Any adjustment, service or maintenance by the home owner

and/or user may create a condition where the operation of

the product could cause personal injury or property damage.

Only qualified service personnel, a contractor, or an installer

may refer to the service and maintenance section of this

manual for assistance or for additional information on this

appliance.

This product requires periodic routine maintenance and

cleaning of the exterior surfaces by the homeowner or user

to remove dust and debris. Any additional service must be

performed by qualified personnel. This appliance must be

serviced and maintained as specified in these instructions

and/or to any applicable local, state, and national codes

including, but not limited to building, electrical, and

mechanical codes.

FIRE OR ELECTRICAL HAZARD

Failure to follow the safety warnings exactly could result in

serious injury, death, or property damage.

A fire or electrical hazard may result causing property

damage, personal injury or loss of life.

Do not use this appliance if any part has been under water.

A flood damaged furnace is extremely dangerous.

Attempts to use the air handler can result in a fire.

A qualified contractor, installer, or service agency must be

contacted to inspect the fan coil unit for any water damage

and replace all components, control system parts, or

electrical parts that have been damaged. If enough damage

is present, the air handler may need to be replaced

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not less than 18 inches above the floor and the fan coil

unit must be located or protected to avoid physical

damage by vehicles.

12.These instructions cover minimum requirements and

conform to existing national standards and safety codes.

In some instances these instructions exceed certain local

codes and ordinances, especially those who have not kept

up with changing modular home and residential home

construction practices. These instructions are to be

followed and are the minimum requirement to perform

service or repairs on this appliance.

SECTION III: OWNERS INFORMATION

AND SEASONAL INFORMATION

How The Fan Coil Unit Works – Heating Cycle

The appliance is equipped with the controls necessary for

proper and safe operation.

The air handler is equipped with a relay(s), time delay relay,

transformer, Electric Heaters (Electric Heat Models Only), and

a blower assembly. The transformer provides 24 VAC to the

thermostat.

When the thermostat calls for heat on the electric heat models,

24 VAC is sent through the limit controls to the contactor coil.

The contactor energizes sending 240 VAC to the electric

heaters causing them to get hot. The indoor fan motor is then

energized on the selected heating speed tap after an “ON” time

delay and the circulating blower draws cool air from the living

space(s), passes it across the heater coils and circulates the

warmed air through the duct work to the living space(s). When

the thermostat is satisfied the electric heaters are de-energized.

The blower is also de-energized after an “OFF” time delay.

The heating cycle has ended and the fan coil unit is ready for

the next call for heat to start the next cycle.

When the thermostat calls for heat on the hydronic heating

models it sends a 24 signal to the “W” terminal on the control

board. If the model has a water pump the control board will

energize the pump causing the flow of hot water thru the hot

water coil, heating the coil. The indoor fan motor is energized

on the heating speed tap after the selected”ON” time delay.

The circulating blower then draws cool air from the living

space(s), passes it across the hot water coil and circulates the

warmed air through the duct work to the living space(s). When

the thermostat is satisfied the circulating pump is de-

energized. The blower is also de-energized after the selected

“OFF” time delay, the heating cycle has ended and the air

handler is ready for the next call for heat to start the next

cycle.

How The Air Handler Works – Cooling Cycle

When the thermostat calls for cooling, 24 VAC is sent to the

compressor contactor causing it to close energizing the

compressor and the outdoor fan motor. The indoor fan motor

is then energized on the selected cooling speed tap after the

selected “ON” time delay and the circulating blower draws air

from the living space(s), passes it across the cooling coil in the

air handler and circulates the cooled air through the duct work

to the living space(s). When the thermostat is satisfied the

compressor contactor is de-energized turning off the

compressor and the outdoor fan motor. The blower is also de-

energized after an “OFF” time delay and the cooling cycle has

ended. The fan coil unit is ready for the next call for cooling to

start the next cycle.

When the thermostat calls for heat pump, 24 VAC is sent to

the compressor contactor causing it to close energizing the

compressor and the outdoor fan motor. The reversing valve is

energized causing the flow of the refrigerant to reverse and

heat the coil inside the fan coil unit. The indoor fan motor is

then energized on the selected heat pump speed tap after the

selected “ON” time delay and the circulating blower draws air

from the living space(s), passes it across the coil in the fan coil

unit and circulates the warmed air through the duct work to the

living space(s). When the thermostat is satisfied the

compressor contactor is de-energized turning off the

compressor and the outdoor fan motor. The blower is also de-

energized after an “OFF” time delay and the heat pump cycle

has ended. The air handler is ready for the next call for heat

pump to start the next cycle.

NOTE: Hydronic Models use a control board where the “Y”

signal from the thermostat is connected to the “Y” terminal on

the control board and the signal is passed through “CLin”

terminal and the “Clout” terminal to the “CC” terminal. If a

compressor lockout switch is not used a jumper wire must be

placed across the “CLin” terminal and the “Clout” terminal to

get a signal on the “CC” terminal. You must use the “Y” and

“CC” terminals for the blower motor to operate during the

cooling or heat pump cycle.

Examination of the air handler

The home owner should perform a visual examine the furnace

every month for any defects or problems. The items to be

inspected are:

1. The physical support of the fan coil unit is sound without

sagging cracks, gaps, etc. around the base so as to provide

a seal between the support and the base.

2. The fan coil casing for any obvious signs of deterioration

from rust or corrosion.

3. The return and supply duct connections are physically

sound and are sealed to the fan coil casing.

4. The fan coil must be serviced by qualified personnel

annually, preferably at the start of each heating season.

FIRE OR ELECTRICAL HAZARD

Servicing heating/cooling equipment can be hazardous due

to electrical components.

Only trained and qualified personnel can service or repair

heating/cooling equipment. The home owner must never try

to perform service, repair or maintenance on this appliance.

Untrained service personnel can perform only basic

maintenance functions such as cleaning of exterior

surfaces and replacing the air filters.

Observe all precautions in the manuals and on the attached

labels when working on this appliance

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Figure 1: Fan Coil Unit Visual Check Points

The Service Technician

The fan coil’s best friend is a qualified service technician. If

the appliance gives any indication of improper operation, call

the service technician. The service technician is allowed to

perform the normal routine care of your appliance. He can

detect potential problems and make corrections before trouble

develops. Preventative maintenance of this type will allow the

fan coil unit to operate with minimal concerns to the

homeowner and will add years of comfort.

Warranty and Responsibilities

It is the sole responsibility of the homeowner to make certain

the fan coil unit has been properly installed and adjusted to

operate properly.

The manufacturer warrants the appliance to be free from

defects in material or workmanship for a stated time in the

warranty agreement. The manufacturer will not be responsible

for any repair costs to correct problems due to improper setup,

improper installation, improper fan coil adjustments, installing

parts or components on the appliance that are not listed for use

with this appliance, improper operating procedures by the user

or repairs performed by the appliance user or owner.

Some specific examples of service calls which will be

excluded from warranty reimbursement are:

1. Correcting faulty duct work in the home. This can be due

to not enough ducts or ducts are too small to provide

proper air flow through the fan coil unit.

2. Correcting electrical wiring problems in the supply wiring

to the fan coil unit.

3. Resetting circuit breakers or on/off switches used for

servicing.

4. Problems caused by installation and operation of any air

conditioning unit, heat pump, or other air quality devise

which is not approved for use with this fan coil unit.

5. Adjusting or calibrating the thermostat.

6. Problems caused by construction debris which has fallen

into the fan coil unit.

7. Replacement of fuses.

8. Problems caused by dirty air filters.

9. Problems caused by restrictions in the return or supply air

flow causing low air flow.

The home owner should establish a firm understanding of

these responsibilities with the installer or Service Company so

there will be no misunderstanding of what will be covered

under warranty at a later date.

While you are away

The fan coil unit is equipped with safety shutoff devices which

are designed to prevent the appliance from overheating in case

of a malfunction. For this reason it is never practical to assume

the appliance will operate unattended for a long period of

time. An example of a malfunction that can cause significant

damage to the home would be:

If the blower motor fails the heaters will cycle on the safety

shutoff devices while the temperature inside your home

continues to drop. All of the water pipes will freeze once the

temperature falls below 32°F.

If you are planning to be away from home for a long period of

time, have someone check on your home everyday, especially

when the outside temperatures will be below 35°F to ensure

the fan coil is operating properly. This may prevent water

pipes from freezing.

The Fan Coil Unit Fails to Operate Properly

If any abnormalities are observed while the fan coil unit is

operating normally, perform the following checks:

1. Check the setting on the thermostat to make sure the

thermostat is set above the room temperature.

2. Check to see if the electrical power is turned on at the

circuit breakers at the main service circuit breaker box or

check any on/off switches that may be used for service

disconnect switches.

3. Check any inline fuses that may have been installed on

the fan coil unit to determine if it has blown.

4. Make sure the air filters are clean, return grilles clean, are

not obstructed, and supply air registers are open.

If the cause of the malfunction is not obvious do not attempt to

service the appliance yourself. Call a qualified service

agency/company to repair the appliance.

When to Call For Service Assistance

Very often time can be saved if you give a service agency the

information about the fan coil unit ahead of time. This will

enable the service agency to determine the specific

components used and possibly indentify the problem, thus

arriving with the parts to fix the problem. Write down the

model number, Serial Number and be prepared to describe

what the fan coil unit is or is not doing and what you have

checked prior to calling.

FAN COIL UNITS WITH ELECTRIC HEATERS

Should overheating occur turn the circuit breakers on the

main electrical service entrance (Circuit Breaker Box) to the

off position. Call qualified service personnel to troubleshoot

and repair the appliance. DO NOT allow the fan coil unit to

continue to cycle on the limit switches.

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SERVICE AGENCY INFORMATION

Fill in Below

MODEL NUMBER:

SERIAL NUMBER:

SERVICE COMPANY:

ADDRESS:

TELEPHONE (DAYTIME):

TELEPHONE (EMERGENCY)

NOTES:

SECTION IV: STARTUP AND SHUTDOWN

INSTRUCTIONS

Read the instructions below before trying to start the

appliance.

A. BEFORE OPERATING; check around perimeter of the

fan coil unit to make sure there are no flammable

materials in the area. If you smell vapors of any kind, DO

NOT turn on the power to the appliance until vapors have

been ventilated and removed from the area of the

appliance.

B. CHECK THE FURNACE; visually check the appliance

for loose screws and/or panels that may be missing or

have fallen off.

C. CHECK DUCT CONNECTIONS; visually check the

connections of the ducts to the appliance to make sure

there are no gaps or holes and ducts are securely fastened

to the fan coil unit.

Turn On / Start the Appliance

1. STOP! Read the safety information above before

proceeding.

2. Set the thermostat to the lowest setting.

3. Turn off all electrical power to the appliance at the main

service disconnect box.

4. Open the ceiling access panel.

5. Turn off the circuit breakers to the appliance.

6. Remove the control box cover.

7. Visually check the control box for loose wire connections

and faulty or loose components.

8. Visually check the blower compartment for obstructions

or loose debris.

9. Replace the control box cover.

10. Close the ceiling access panel.

11. Turn the circuit breakers in the main service disconnect

box to the on position.

12. Set the thermostat to the desired setting.

Shutting Down or Turning Off the Appliance

1. Set the thermostat to the lowest setting.

2. Turn off all electrical power to the appliance at the main

service disconnect box.

3. Open the ceiling access panel.

4. Turn off the service disconnect on the appliance, if used.

5. Close the ceiling access panel.

SECTION V: OWNER MAINTENANCE

All appliances need annual maintenance in order to operate

properly. The annual service must be preformed by qualified

service personnel. The homeowner is expected to perform

general cleaning of the exterior surfaces and replacement of

the air filters. Air filters must be checked every month and

replaced as needed. Figures 2 and 3 indicate the location of the

air filters.

Figure 2: Home Owner / Users Cleaning Points

Louvered Ceiling Access Panel Air Filter Replacement

Fan coil units that are installed in a horizontal position

generally have the filters in louvered ceiling access panels

located in the ceiling. The louvered ceiling access panel has an

air filter rack designed to retain a 1” thick standard air filter.

Follow these easy steps to replace the air filters.

1. Follow the procedure “To Turn Off the Appliance” in

the Startup and Shutdown Instructions section of these

instructions.

2. Remove the white handled thumb screw on the front of

the louvered ceiling access panel. Be careful when you

remove the last thumb screw as the panel can swing down

rather quickly and strike you in the head.

3. Let the grille door fall towards you, then, just let it hang.

4. Remove the air filter. The air filter is a disposable filter

DO NOT attempt to clean the filter and reuse it.

REPLACE IT EACH TIME YOU CHANGE THE AIR

FILTER.

5. The air filter will be 24” x 20” x 1”.Make sure it is

replaced with a standard air filter that is 24” x 20” x 1”.

If you do not follow these instructions exactly, a fire may

result causing property damage, personal injury, and/or loss

of life.

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6. Clean any dust or debris from both sides for the louvers

and around the area where the filter is placed before the

new air filter are installed.

7. Place the new air filter back into the louvered ceiling

access panel air filter rack, push the louvered ceiling

access panel closed and tighten the thumb screw until the

panel is securely fastened to the louvered ceiling access

panel frame assembly.

1. Follow the “Turn On / Start the Appliance” in the

Startup and Shutdown Instructions section of these

instructions.

NOTE: Make sure the flow arrows on the air filter are pointing

away from the louvers in the louvered ceiling access panel.

Figure 3: Ceiling Access Panel Air Filter Location

Figure 4: Replacement Standard 1” Air Filter

Figure 5: Optional Return Air Filter Grille

Air Filter Replacement – Optional Filter Grille

Follow these easy steps to replace the air filters.

2. Follow the procedure “To Turn Off the Appliance” in

the Startup and Shutdown Instructions section of these

instructions.

3. Remove the white handled thumb screws on the front of

the accessory filter grille located at the return air end of

the appliance.

4. Let the top of the door fall towards you then push down

towards the floor.

5. Remove the air filter. The air filter is a disposable filter.

DO NOT attempt to clean the filter and reuse it.

6. Check the size of the air filter that was removed to make

sure it is replaced with a filter that is the same size.

7. Clean any access dirt or debris around the front area

where the air filter is located. Be careful not to use any

small vacuum cleaner parts or any small brushes to clean

inside the filter box, around the filter track. These parts or

brushes can fall off or drop into the return duct causing a

restriction of the return air flow.

8. Slide the air filter into the filter rack, push the door closed

and tighten the thumb screw.

9. Follow the “Turn On / Start the Appliance” in the

Startup and Shutdown Instructions section of these

instructions.

NOTE: Make sure the flow arrows on the air filter are pointing

away from the louvers in the return air filter grille.

NOTE: Accessory filter grille can be used on the return air end

of the fan coil unit when the louvered ceiling access panel is

not desired because of noise.

Pull tabs to open and remove air filte

IMPACT HAZARD

Use extreme caution when removing the Ceiling

Access Panel screws. The panel is secured to the

frame assembly with the thumb screws. Once the

thumb screws have been removed the Ceiling Access

Panel will swing down very quickly. Anyone that

standing under the Ceiling Access Panel will get hit

with the panel unless the panel is supported by holding

it with their hands.

The louvers can also have sharp edges which can cut

hands or fingers. The use of gloves is recommended

when servicing the horizontal fan coil unit.

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SERVICE AND MAINTENANCE MANUAL

SECTION I: SAFETY

THE HOME OWNERS AND / OR APPLIANCE USERS

MUST STOP HERE! DO NOT PROCEED ANY

FURTHER!

This section has been designed to assist a qualified service

agency in performing service and maintenance on this

appliance.

The homeowners and/or the appliance user must never

attempt to perform any service or maintenance on the

appliance especially when it involves the removal or

adjustment of any parts and/or components.

The following safety rules must be followed when servicing

this furnace.

This is a safety alert symbol. When you see this symbol

on labels or in manuals; be alert to the potential for personal

injury.

Understand and pay particular attention to the signal words

DANGER, WARNING, or CAUTION.

DANGER: indicates an imminently hazardous situation, which

if not avoided, will result in death or serious injury.

WARNING: indicates a potentially hazardous situation, which if

not avoided, could result in death or serious injury.

CAUTION: indicated a potentially hazardous situation, which if

not avoided, may result in minor or moderate injury. It is also

used to alert against unsafe practices and hazards involving

property damage.

SAFETY REQUIREMENTS

1. The fan coil units with electric heaters have a two (2) pole

terminal block to connect the electrical supply circuit.

Make sure you check each electrical circuit with a meter

to be sure the power has been disconnected.

2. Insulating materials may be combustible. The fan coil unit

must be kept free and clear of insulating materials.

3. Follow the instructions exactly as shown in Startup and

Shutdown Section in this manual to properly Startup or

Shutdown this appliance.

4. Make sure all moving parts have come to a complete stop

before attempting to perform any work the appliance.

Moving parts can cause serious injury if clothing or body

parts get caught in the moving part.

The manufacturer or distributer will not be responsible for

any repairs due to removal of parts or improper parts

changes, improper maintenance, improper adjustments or

improper modifications to this fan coil unit that were

performed by the homeowner and/or the appliance user.

The manufacturer will not be responsible if the homeowner

and/or appliance user use this section of the instructions in

an attempt to perform maintenance or repairs to the fan coil

unit. This practice is very dangerous and may result in a fire

causing property damage, personal injury, loss of life and/or

will void the appliance warranty.

Improper adjustment, service or maintenance may create a

condition where the operation of the product could cause

personal injury or property damage.

Refer to this manual for assistance or for additional

information consult the Technical Support Group.

This product must be serviced and maintained as specified

in these instructions and/or to any applicable local, state,

and national codes including, but not limited to building,

electrical, and mechanical codes.

FIRE OR ELECTRICAL HAZARD

Failure to follow the safety warnings exactly could result in

serious injury, property damage, or death.

A fire or electrical hazard may result causing property

dama

ersonal in

or loss of life.

ELECTRICAL SHOCK, FIRE HAZARD

Failure to follow the safety warnings exactly or

improper servicing could result in dangerous operation,

serious injury, property damage, and/or death.

Before servicing, disconnect all electrical power to the

appliance. Make sure you disconnect service

disconnects. Make sure you check for any accessories

that may be power by a separate power supply and be

sure to disconnect that power supply.

When servicing controls, label all wires prior to

disconnecting to aid in proper reconnection of wires.

Verify proper operation after servicing by turning the

thermostat above the room temperature for a brief

period of time to ensure proper appliance operation

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SECTION II: FAN COIL UNIT

MAINTENANCE

The interior sections of the fan coil unit must be cleaned and

adjusted by a qualified service contractor once a year or before

the start of each heating or cooling season. The following

items must be checked:

1. The blower wheel and motor for excessive dirt.

2. The electric heaters for wear, damage or corrosion.

3. The electrical components for excessive dust, dirt, wear,

or deterioration.

4. The supply air duct system for excessive dust, dirt or

debris

5. The return air duct system for excessive dust, dirt or

debris

6. All electrical wiring for wear, insulation cracks and/or

damage.

7. Check the air conditioning evaporator coil for dust, debris

or damage.

8. Check the evaporator coil drain pan for proper drainage to

prevent water backup into the unit.

9. The fan coil casing and all interior sheet metal panels or

dividers.

Fan Coil Unit Cleaning Procedure

1. Follow the instructions exactly as shown in Startup and

Shutdown Section in this manual to properly shutdown

this appliance.

2. Open the ceiling access panel by removing the thumb

screws.

3. Remove the four (4) screws that secure the motor guard to

the control box.

4. Remove the control box cover by removing the four (4)

screws that are securing the cover to the fan coil unit.

5. Disconnect the blower motor power wires from the relay

and the terminal block.

6. Remove the strain relief that is securing the wires to the

control box and remove the blower motor wires from the

control box.

7. Remove the two screws on the blower mount plate

located on the right side, the left side, the screw on the top

center and the screw in the control box. Refer to Figure 27

for screw locations.

8. Grab the blowers and lift the panel up and pull out on the

bottom. Slide the panel down and out of the fan coil

chassis.

9. Use a vacuum cleaner and a small brush to remove any

dirt and debris from the blower and evaporator coil

compartments.

10. Check the evaporator condensate drain pan for any debris

and ensure the pan is properly draining by pouring water

into the drain to check it.

11. Remove any excess water that may have spilled from

checking the evaporator condensate drain.

12. Pour ½ cup of Clorox in the drain pipe to kill any fungus

that may be growing inside the pipe. This will help keep

the condensate drain from plugging.

13. Check in the area in front of the blower where the heater

elements are located and remove any dust, dirt or debris

from around the heater elements. Be careful not to

damage the heater elements with the vacuum hose or the

brush.

Figure 6: No Electric Heat Control Box

Figure 7: Hydronic Heat Control Box – No Pump

Figure 8: Electric Heat Control Box

Figure 9: Blower Assembly and Mounting Screw Location

FIRE HAZARD

NEVER PLACE A JUMPER BETWEEN “R” & “W”

Placing jumper wire between the RED and WHITE

thermostat wires at the fan coil unit in order to override the

thermostat and energize the heater elements is an extremely

dangerous practice that can result in damage to the

thermostat, dangerous operation, serious injury, property

damage and/or death.

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14. Check both blower wheels for dust and debris. Use the

brush and the vacuum cleaner to remove any dust or

debris from the wheels. Be careful not the move or

accidentally remove the blower wheel balance weight

located on the wheel blade. If it is moved or removed it

will cause the blower wheel to vibrate. If the wheel is

vibrating, you must replace it.

15. Check the blower motor for dust and debris. Be sure to

clean the openings on the motor housing as these

openings are used to cool the motor. If the dust, dirt or

debris has not been removed from these openings it will

cause the motor to run hotter than normal and will shorten

the life of the motor.

16. Check and clean with the brush and vacuum cleaner any

dust in the supply and return ducts or passages as far as

you can reach. If these ducts look like they have an

excessive amount of dust, dirt or debris you should

recommend to the home owner or user to call a

professional to properly clean the duct system as dust is

very flammable and can easily catch fire.

17. Check and clean any dust, dirt, or debris from all of the

controls and all of the surfaces in the control box. If dust

or dirt is left on the components they will operate at a

much hotter temperature causing premature component

failure.

18. Check the evaporator coil for dust or dirt. If the

evaporator coil is dirty you must use a foam spray to

clean the coil. Before cleaning you must remove the

electric heaters on electric heat models only. Follow the

procedure for removing the electric heaters in this

manual. Once the electric heaters have been removed or if

you do not have electric heat; spray the entire surface of

the coil. You do not need to rinse the coil as that will

happen when you run the air conditioner.

19. On electric heat models only replace the heaters as

described in the procedure for removing the electric

heaters in this manual.

20. Grab the blowers and lift the panel up, push in on the

bottom, then pull down to set the blower mount plate in

place.

21. Replace the two screws on the blower mount plate located

on the right side, the left side, the screw on the top center

and the screw in the control box. Refer to Figure 27 for

screw locations.

22. Place the motor wires into the control box and replace the

strain relief that is securing the wires to the control box.

23. Reconnect the blower motor power wires from the relay

and the terminal block.

24. Replace the control box cover and secure with the screws

that were removed.

25. Close the ceiling access panel and secure the panel with

the thumb screws that were removed.

26. Follow the instructions exactly as shown in Startup and

Shutdown Section in this manual to properly startup this

appliance.

Removing Electric Heaters

1. Follow the instructions exactly as shown in Startup and

Shutdown Section in this manual to properly shutdown

this appliance.

2. Open the ceiling access panel by removing the thumb

screws.

3. Remove the control box cover by removing the four (4)

screws that are securing the cover to the fan coil unit.

4. Disconnect the blower motor power wires from the relay

and the terminal block.

5. Remove the strain relief that is securing the wires to the

control box and remove the blower motor wires from the

control box.

6. Remove the strain relief that is securing the supply power

wires and remove the wires from the control box.

7. Remove the five (5) screws that secure the control box to

the fan coil unit and remove the control box. The electric

heater elements are attached to the control box and will be

removed with it so be careful not to damage the heaters

while you are removing the control box.

8. Remove the wires from the heater screw terminals.

9. Remove the two (2) screws that secure the limit control to

the electric heater mount plate and remove the limit

control.

10. If you are removing the right side electric heater you must

remove the two relays that are in front of the electric

heater.

11. Remove the four (4) screws that are securing the electric

heaters to the control box and remove the heater.

12. Reinstall the new electric heater and secure it to the

control box with the screws that were removed.

13. Reinstall the limit control in the hole provided in the

heater mount plate and secure it with the screws that were

removed.

14. Reconnect the wires and the relays that were removed in

Steps 8 and 10.

15. Reinstall the control box and secure it the fan coil unit

with the screws that were removed in Step 7.

16. Reinstall the wires that were removed in Steps 4, 5 and 6.

17. Reinstall the control box cover and secure to the control

box with the screws that were removed in Step 3.

18. Close the ceiling access panel and secure to the frame

assembly with the thumb screws that were removed in

Step 2.

19. Follow the instructions exactly as shown in Startup and

Shutdown Section in this manual to properly startup this

appliance.

SECTION III: FAN COIL UNIT CONTROLS

Electric Heat Models

This section discusses the fan coil unit controls and how they

operate. Refer to Figure 9 for component locations.

1. The Limit Controls – Each electric heater element has a

limit control directly in front of it to sense overheating of

the element and open if the temperature gets above the set

point of the limit control.

2. The Heater Contactors – The electric heater relays

simply turn the heater elements on and off. The relays are

controlled by the thermostat. On a call for heat 24 VAC is

sent to the relay(s) 24 VAC coil energizing the relay.

When the call for heat has been satisfied the 24 VAC is

removed from the relays 24 VAC coil de-energizing the

relay(s). The contactor is rated for a 50 Amp resistive

load.

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3. Cooling Time Delay Relay (TDR) – The cooling time

delay relay is used as the blower motor “ON” delay.

When the thermostat calls for cooling or the fan switch on

the thermostat is moved from the “AUTO” to the “ON”

position, 24 VAC is placed on the “G” terminal from the

thermostat to the 24 VAC coil on the time delay relay.

The relay controls the blower on time delay and is

adjustable from 4 - 30 seconds. There is no off delay.

4. Circuit breakers – The circuit breakers are the over-

current protection for the fan coil unit. Field wiring must

be protected by field supplied circuit breakers or fuses

sized to protect the wire connected to the fan coil unit.

5. Transformer – The transformer is used to step down

voltage from 240 VAC to 24 VAC. The transformer

provides the required 24 VAC for the system control

circuit.

6. Blower Motor Isolation Relay - This relay is used for

isolation between the high and low speeds of a motor. The

wiring has been designed so that the normally closed

contacts are used for heating and the normally open

contacts are used for cooling. The relay coil is energized

after the thermostat has a call from the “G” terminal

starting the time delay cycle on the time delay relay. Once

the time delay relay has reached the delay setting the relay

contacts close energizing the isolation relay coil. The

normally closed contacts on the isolation relay open and

the normally open contacts close, energizing the motor on

the selected cooling speed.

Hydronic Heat Models

This section discusses the fan coil unit controls and how they

operate. Refer to Figure 10 for component locations.

1. Transformer – The transformer is used to step down

voltage from 240 VAC to 24 VAC. The transformer

provides the required 24 VAC for the system control

circuit.

2. Control Board – The hydronic models use a hydronic

control board to operate and control all of the components

on the fan coil unit. The water pump is connected directly

to the “PUMP” terminals on the board. The “W” signal

from the thermostat controls the operation of the pump.

When there is a 24 VAC signal from the thermostat to the

“W” terminal on the hydronic control board the pump will

energize and start the flow of water to the heating coil.

The indoor fan motor will start on the selected speed tap

after the selected time delay has expired. When the call

for heat has been satisfied and the “W” signal is removed

from the hydronic control board the pump will de-

energize and the flow of water to the coil will stop.

The fan coil unit is now in standby mode waiting on the

next call for heat.

3. Blower Motor Operation – The hydronic control board has

three (3) speed terminals for the blower motor. The hydronic

control board will send 120 VAC to the “HI” terminal for

cooling operation, or send 120 VAC to the “MED” terminal

for de-humidification when the fan coil unit is in the cooling

operation, or send 120 VAC to the “LOW” terminal for low

speed blower operation in the heating operation. The hydronic

has two jumper pins for selectable blower motor “ON” and

“OFF” time delays. The user can select either a 0 second

delay, or a 15 second delay, or a 30 second delay on the

blower motor start. This allows the blower to delay on start for

the selected time. The user can select either a 0 second delay,

or a 15 second delay, or a 30 second delay on the blower

motor stop cycle. This allows the blower motor to continue to

operate for the selected time.

Hydronic Control Board Terminal Descriptions

This section discusses the air handler controls and what each

terminal on the control does. Refer to Figure 11 for hydronic

control board terminals.

Common

MED

XFMR

PUMP

LOW

RRR

CL-INCC CL

OUT F1

AQGW

FRRH/

DHM

FAN

OFF

24V

COM

VALVE

N/L2

BOILER

FAN CIR

Rin

Figure 10: ICM AY1015 Hydronic Control Board for

Constant Torque Motors

Hydronic Control Board Terminals and Descriptions

ICM AY1015 - Mortex Part No. 68AE0011 - Control is for

Constant Torque blower motors. The ECM motors use the

ECM Motor Control Board. The terminals and functions are

discussed below for the AY1015.

115 VAC Terminals:

L1 – Supply Voltage (115 VAC) to the control

L2 – Supply Neutral (115 Neutral) to the control

XFMR and L2 – 115 VAC supply to transformer

Pump and L2 – 115 VAC to the water pump

24 VAC Terminals AY1014 and AY1015:

Rin – 24 VAC supply from the transformer

24V COM – 24 VAC common from the transformer

R– Fused 24 VAC output connections

Y– Connect to the thermostat Y terminal

CC – Connect CC and 24V COM to the compressor contactor

on the outdoor unit.

CLin & Clout – connection between Y and CC

AQ – 24 VAC from aquastat temperature switch

G – 24 VAC from thermostat G terminal

W– 24 VAC from thermostat W terminal

FR – 24 VAC from freeze protection switch

RH/W2 – 24 VAC from thermostat W2 terminal

BY – 24 VAC from the priority switch on tank less heater

DHM – 24 VAC from thermostat DHM terminal

VALVE – 24 VAC and 24V COM to zone valve

BOILER – switch, connect to “T” ”T” terminals on boiler

aquastat

24 VAC Blower Speed Tap Terminals:

HI & COM – 24 VAC high speed tap to blower motor

MED & COM - 24 VAC medium speed tap to blower motor

LO & COM - 24 VAC Med-low speed tap to blower motor

FAN CIR & COM – 24 VAC low speed tap to blower motor

CLin and CLout – These terminals must be connected to

transfer 24 VAC from the Y terminal to the CC terminal.

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When the compressor lockout switch is used the switch is

secured to the water coil. The two yellow wires are connected

to the CLin and the CLout terminals. When the temperature of

the water coil reaches 38°F the switch opens which de-

energizes the CC terminal on the control board. When the

water temperature has risen above 42°F the compressor

lockout switch will close. The control will send 24 VAC to the

CC terminal on the control board.

** If the compressor lockout switch is not used place a jumper

wire on CLin and CLout to get 24 VAC from the Y terminal to

the CC terminal. The indoor blower will not energize in the

cooling mode until the CC terminal has 24 VAC at the

terminal.

AQ – The aquastat switch is placed on the hot water line

exiting side of the air handler coil. The aquastat is connected

to the R terminal and the AQ terminal on the control board.

The AQ jumper pin shown in Figures 1 and 2 must be in the

ON position to use this feature.

When there is a call for heat – 24 VAC on the W terminal and

the water line temperature reaches the aquastat switch setting

the switch will close sending 24 VAC to the AQ terminal

turning on the blower motor. The blower motor will not

energize until the aquastat switch is closed. When the call for

heat has been removed the indoor blower will de-energize

after the selected OFF delay.

VALVE – There are two terminals used to power a 24 VAC

zone valve or solenoid valve. The terminal closest to the 24V

COM terminals is a 24V common terminal to the valve. See

Figures 1 and 2. The other terminal is the 24 VAC output to

the valve. When there are 24 VAC to the W terminal the

control board will send 24 VAC to the valve terminals. The

VALVE terminals de-energize when the 24 VAC is removed

from the W terminal.

BOILER - There are two terminals that are connected to a

switch. The terminals do not output any voltage. They are dry

contacts. The BOILER switch is designed to be connected to

the “T” “T” terminals on a boiler aquastat to energize the

boiler when the control board has a call for heat (24 VAC on

W).

G – When 24 VAC is placed on the G terminal the control will

energize the indoor blower on the FAN CIR speed terminal

with NO delay. When the 24 VAC signal has been removed

from the G terminal, the indoor blower will de-energize with

NO delay.

If there is a call for heat (24 VAC on the W Terminal) while

24 VAC is present on the G terminal, the control will energize

the pump, valve and boiler. The indoor fan motor will de-

energize. The indoor fan motor will be energized on the LO

speed terminal after the selected ON delay. When the call for

heat has been removed the control will de-energize the valve,

pump and boiler. The indoor fan motor will de-energize after

the selected OFF delay then, the indoor fan motor will switch

to the FAN CIR speed terminal.

W - When 24 VAC is present on the W Terminal the control

will energize the pump, valve and boiler. The indoor fan will

start on the LO speed terminal after the selected ON delay.

When the call for heat has been removed the control will de-

energize the valve, pump and boiler. The indoor fan motor

will de-energize after the selected OFF delay.

FR – The FR terminal energizes the control board freeze

protection. The freeze protection switch is secured to the water

coil. The two white wires are connected to the R terminal and

to the FR terminal on the control board. When the temperature

of the coil is below 38°F the freeze protection switch closes it

sends 24 VAC to the FR terminal. The control will energize

the pump, valve and boiler. The control will not energize the

indoor fan motor even when there is a call for heat with 24

VAC on the W terminal. When the water temperature has

risen above 42°F the freeze protection switch will open. The

control will de-energize the pump, valve and boiler, providing

there is not a call for heat. If there is a call for heat at the time

FR is de-energized the pump, valve and boiler will remain ON

and the control will start the indoor fan motor on the LO speed

terminal after the selected ON delay.

RH/W2 – RH is only used for reheat mode with a thermostat

that has the reheat function.

BY – Bypass terminal is used when the heating and domestic

hot water system are managed with the same tankless hot

water system. The domestic water line has a normally open

flow switch that is connected to the R and the BY terminals on

the control board. When the domestic water flow switch

detects the flow of water the switch closes sending 24 VAC to

the BY terminal. The control will de-energize the PUMP,

VALVE, BOILER and the Indoor Fan Motor. When the

domestic water flow has stopped the domestic water flow

switch will open and the PUMP, VALVE and BOILER will

resume normal operation. The indoor fan will be energized

after the selected ON delay.

Y– When 24 VAC is placed on the Y terminal the control will

energize the indoor blower on the HI speed terminal after the

selected ON delay. When the 24 VAC signal has been

removed from the Y terminal, the indoor blower will de-

energize after the selected OFF delay.

If there is 24 VAC on the G Terminal while 24 VAC is present

on the Y terminal, the control will energize the indoor fan

motor on the HI speed terminal. When the 24 VAC has been

removed the control will switch the indoor fan motor back to

the FAN CIR speed terminal. When 24 VAC is removed from

the G terminal the indoor blower motor will de-energize with

NO delay.

DHM – Dehumidification mode can be used with any

thermostat that has dehumidification terminal. The

dehumidification terminal must sent 24 VAC to the DHM

terminal on the control board to put the control in

dehumidification mode.

On Startup when 24 VAC is present on the Y terminal the

control will pass 24 VAC to the CLin, then to the CLout

terminal, then to the CC terminal to energize the compressor

contactor. If the DHM terminal has 24 VAC present the

control will energize the indoor blower motor on the MED

speed terminal after the selected ON delay.

If the control has the indoor blower motor operating on the HI

speed terminal when 24 VAC is placed on the DHM terminal

the control will switch to the MED speed terminal with NO

delays.

If the control has the indoor blower motor operating on the

MED speed terminal when 24 VAC is removed from the

DHM terminal the control will switch to the HI speed terminal

with NO delays.

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SECTION IV: SEQUENCE OF OPERATION

Continuous Blower – Electric Heat Models

The thermostat has a manual fan switch that can be moved to

the “On” position or it can be programmed for continuous fan

operation. This setting causes the thermostat to complete the

circuit between “R” and “G” terminals causing the time delay

relay to start the time delay cycle. Once the time delay relay

has completed the on-delay cycle the contacts will close

sending voltage to the isolation relay coil. The isolation relay

will close the normally open contacts (Terminals #2 and #4)

sending voltage to selected indoor blower motor speed tap

connected to terminal #4. The normally closed contacts

(Terminals #5 and #6) will open.

The indoor blower will operate continuously until the fan

switch on the thermostat has been switched from “ON” to

“AUTO”.

Continuous Blower – Hydronic Heat Models

The thermostat has a manual fan switch that can be moved to

the “On” position or it can be programmed for continuous fan

operation. This setting causes the thermostat to complete the

circuit between “R” and “G” terminals sending 24 VAC to the

“G” terminal on the control board. Once the selected control

board time has completed the control board will send 120

VAC to the from the “FAN CIR” terminal on the control

board to selected indoor blower motor speed tap.

The indoor blower will operate continuously until the fan

switch on the thermostat has been switched from on to auto.

Figure 11: Component Locations – Hydronic Heat

Models

Figure 12: Component Locations – Electric Heat

Models

Intermittent Blower – Cooling

Electric Heat Models

The thermostat has a manual fan switch that can be moved to

the “Auto” position or it can be programmed for auto fan

operation. When the thermostat calls for cooling, a circuit is

completed between the “R”, “Y” and “G” Terminals. The

indoor fan motor is energized from the “G” terminal on the

thermostat causing the time delay relay to start the on-time

delay. The time delay relay contacts will close the circuit to

the isolation relay coil after the on- delay is complete. The

isolation relay normally open contacts (Terminals #2 and #4)

will close and the motor will operate on the selected speed tap

that has been placed on terminal #4.

When the thermostat is satisfied the circuit between “R”, “Y”

and “G” will open. The time delay relay will open the circuit

to the isolation relay and the blower motor will turn off. The

constant torque blower motor will have a 13 second off-delay.

The blower is now in the standby mode waiting for the next

cooling cycle

Hydronic Heat Models

The thermostat has a manual fan switch that can be moved to

the “Auto” position or it can be programmed for auto fan

operation. When the thermostat calls for cooling, a circuit is

completed between the “R”, “Y” and “G” terminals sending

24 VAC to the “W” terminal on the hydronic control board.

The hydronic control board will send 120 VAC to the blower

motor via the high speed terminal and the motor will operate

on the selected speed tap that has been placed on the “HI”

terminal on the hydronic control board.

When the thermostat is satisfied the circuit between “R”, “Y”

and “G” will open. The circuit to the hydronic control board

will open the high speed relay on the board and the blower

motor will turn off. The blower is now in the standby mode

waiting for the next cooling cycle

The Heating Cycle

Electric Heat Models

When the thermostat is in the HEAT mode and the fan switch

on the thermostat is set to AUTO. The call for heat closes the

thermostat circuit between the “R” and “W” terminals. 24

VAC is sent from the “W” terminal on the thermostat, through

the white thermostat wire, to the white pigtail wire on the fan

coil unit, to the 24 VAC coil on the heater contactor. This

signal energizes the heater contactor, closing the contacts and

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sending 240 VAC to the heaters. The blower motor low speed

wire is also connected to the T1 terminal on the heater

contactor so the blower is energized at the same time as the

heater. The blower will continue to operate until the

thermostat is satisfied. When the call for heat has been

satisfied, the signal will be removed from the “W” terminal

and the “W” terminal is de-energized and the heater contactor

opens turning off the heater and the blower motor. The

constant torque blower motor is connected to the normally

closed contacts of the isolation relay. The 24 VAC signal from

the “W” terminal on the thermostat will energize the motor at

the same time as the heater relay and will de-energize the

motor at the same time as the heater relay.

The fan coil unit is now in standby mode waiting for the next

heating cycle.

Hydronic Heat Models

When the thermostat is in the HEAT mode and the fan switch

on the thermostat is set to AUTO. The call for heat closes the

thermostat circuit between the “R” and “W” terminals. 24

VAC is sent from the “W” terminal on the thermostat, through

the white thermostat wire to the white pigtail wire on the fan

coil unit, to the “W” terminal on the hydronic control board.

The hydronic control board will energize the water pump and

start circulation of hot water through the water coil.

At the same time hydronic control board will send 120 VAC

to blower PSC motor low speed wire. The blower will

continue to operate until the thermostat is satisfied. When the

call for heat has been removed the “W” terminal is de-

energized and the hydronic control board will de-energize the

pump turning off the water pump and the PSC blower motor.

The constant torque blower motor is connected to the normally

closed contacts of the isolation relay. The 24 VAC signal from

the “W” terminal on the thermostat will energize the motor at

the same time as the water pump relay and will de-energize

the motor at the same time as the water pump relay.

The fan coil unit is now in standby mode waiting for the next

heating cycle.

The Cooling Cycle

Electric Heat Models

When the thermostat calls for cooling

The thermostat closes the circuit between the “R”, “Y” and

“G” terminals. 24 VAC is sent from the “Y” terminal through

the yellow thermostat wire to the 24 VAC coil terminal on the

condenser contactor; energizing the contactor and starting the

compressor and outdoor fan motor. At the same time the “G”

terminal is sending 24 VAC through the green pigtail wire to

the indoor blower time delay sequencer. The time delay

sequencer goes through a 30 - 45 second on-delay, and then

closes the normally open contacts sending 24 VAC to terminal

#1 on the isolation relay coil (Coil between terminals #1 and

#3). The isolation relay coil is energized closing the normally

open contacts (Terminals #2 and #4) and opening the normally

closed contacts (Terminals #5 and #6) sending 24 VAC to the

selected X-13 motor speed tap wire connected to isolation

relay terminal #4 or for PSC motors; sending 240 VAC to the

selected speed tap wire connected to isolation relay terminal

#4.

When the thermostat call for cooling has been satisfied the

thermostat opens the circuit between the “R”, “Y” and “G”

terminals. The 24 VAC signal is removed from the thermostat

“Y” terminal de-energizing condenser contactor and outdoor

fan motor. At the same time the “G” terminal 24 VAC is

removed from the green pigtail wire de-energizing the time

delay sequencer. The sequencer will go through a 1-20 second

off delay.

The cooling cycle is complete, and the cooling unit is ready

for the start of the next cooling cycle.

The Motor Isolation Relay

This relay is used in conjunction with the motors to prevent

the possibility of the motors being energized on two speed

taps at the same time. This condition would burn out the motor

windings.

Electric Heat Models Only

Constant Torque motor has a black wire that is connected

from the “W” terminal #1 on the heat relay to the supply side

(Terminal #2) of the normally open terminals on the isolation

relay. The blower motor high speed tap wire is connected to

the load side (Terminal #4) normally open terminal on relay.

Figure 13: Blower Motor Speed Tap Isolation Relay –

Constant Torque Motors

For personal safety be sure to turn the electrical power “OFF” at

the main entrance (Circuit Breaker Box) and at the control box

circuit breakers before attempting any service or maintenance

operations. Home owners should never attempt to perform any

maintenance which requires opening the air handler control box

door.

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SECTION V: TROUBLE SHOOTING

The following checks should be made before trouble shooting

the fan coil unit controls for a no heat issue. The electric heat

models use relays and contactors. The hydronic heat models

use a hydronic control board that controls the operation of all

the components.

1. Check all of the circuit breakers. Make sure they are

turned to the “ON” position and have not tripped.

2. Check all fuses, especially any supply line fuses that were

installed during installation. If the fuse is blown, check

the wiring with an OHM meter for a short to ground. If

shorted, repair the short, and then replace the fuse.

3. Check any electrical switches that are external to the fan

coil unit to make sure they are turned on.

4. Check all wiring connections, especially on any of the

components, to ensure they are securely fastened.

Electric Heat Models

If you have electric heaters and there is 240 volts to the

control box terminal block and you have 24 volts between to

the “R” wire and ground, then continue on through the rest of

the checks.

Constant Torque Motor Check – Electric Heat Models

If the motor is not running, check for 240 volts and 24 volts at

the motor terminals. If the 240 volts and 24 volts is present at

the motor terminals but the motor is not operating, then

replace the motor. Refer to Figure 14 and Table 1 for terminal

locations and definitions.

If 240 volts is not present check the connections to the circuit

breaker or check for an open breaker.

Hydronic Heat Models

If you have hydronic heat and there is 120 volts to the

transformer and you have 24 volts between to the “R” wire

and ground, then continue on through the rest of the checks.

Constant Torque Motor Check – Hydronic Heat Models

If the motor is not running, check for 120 volts and 24 volts at

the motor terminals. If the 120 volts and 24 volts is present at

the motor terminals but the motor is not operating, then

replace the motor. Refer to Figure 14 and Table 1 for terminal

locations and definitions.

If 120 volts is not present check the connections to the circuit

breaker or check for an open breaker.

Heating Mode

If 24 volts is not present on the “W” wire check the

thermostat. If 24 volts is present, check the Heat Contactor

Terminal #A1. If 24 volts is present, check common wire to be

sure it is connected to the common side of the transformer. If

common wire is properly connected and your meter is

showing 24 VAC on terminals A1 and A2 on the contactor

Check to see if you have 230 VAC on terminals contactor. L1

and L2 are the supply voltage for the contactor. T1 and T2 are

the load voltage for the electric heaters. If you have 230 VAC

on L1 and L2 but not on T1 and T2 and you have 24 VAC on

A1 and A2 then replace the contactor.

LOAD

1.5 AMP

MAX

CUT WIRE FOR 120/240VAC

.4 15

30SECONDS

MADEIN

THE USA

ICM

HMPS00C2X30

DELAYON

MAKE

TIMER

CONTROLS

INPUT

19-240

VAC

Figure 14: Adjustable Time Delay Relay (TDR) Terminals

Yellow - ST 3

142R

Blower

Motor

Black - L1

Red - L2 / N

White - ST 4

Blue - Common

Orange - ST 5

Figure 15: Constant Torque 142R Motor Terminals

Terminal Connection

C Speed Tap Common - 24 VAC Common

L Supply Voltage - 240 Vac Line 1

G Ground Connection

N/L2 Supply Voltage - 240 Vac Line 2

1 Low Speed Tap - 24 VAC Input

2 Medium-Low Speed Tap - 24 VAC Input

3 Medium Speed Tap - 24 VAC Input

4 Medium-High Speed Tap - 24 VAC Input

5 High Speed Tap - 24 VAC Input

Table 1: Constant Torque Motor Terminal Connections

Cooling Mode

Time Delay Relay - If 24 volts is not present on the “G” wire

from the thermostat check the thermostat. If 24 volts is

present, check the #3 and #1 terminal on the time delay relay.

Terminal #3 is the 24 VAC line side of the relay and #1 is the

load side of the relay. If you have 24 VAC on terminal #3 but

not on terminal #1 wait for the selected delay to time out. If 24

VAC is not present on terminal #1 after the selected time

delay has expired, then replace the relay.

If the motor is not running, check for 120 volts is present at

the motor terminals and 24 volts is present at the control

board. If the 120 volts and 24 volts is present at the motor and

board but the motor is not operating, then check the control

Blower Isolation Relay Cooling Operation– If 24 VAC is

present across terminals #1 and #3 but there is not 230 VAC

between terminal #4 and L2 on the terminal block, check L1

ad L2 on the terminal block for 230 VAC. If 230 VAC is not

present check the circuit breakers or the service disconnect. If

230 VAC is present check terminal #2 on the blower isolation

relay and L2 on the terminal block. If 230 VAC is present then

replace the relay.

Blower Isolation Relay Heating Operation

To avoid personal injury or property damage, make certain

that the motor leads cannot come into contact with non-

insulated metal com

onents of the unit.

MORTEXPRODUCTSINCFORTWORTH,TX76106Page15

If there is not 230 VAC between terminal #6 and L2 on the

terminal block, check L1 ad L2 on the terminal block for 230

VAC. If 230 VAC is not present check the circuit breakers or

the service disconnect. If 230 VAC is present check terminal

#5 on the blower isolation relay and L2 on the terminal block.

If 230 VAC is present then replace the relay.

Hydronic Heat Models

If you have hydronic heat and there is 120 volts to the

hydronic control board on the L1 and N/L2 terminals. If you

have 120 VAC between L1 and N/L2 then check to see if you

have 24 volts between to the “Rin” wire and 24V COM. If

there is 24 volts present then continue on through the rest of

the checks.

Hydronic Control Board - Heating Mode

Check to determine if 24 VAC is present across the “R” and

24V COM terminals. If 24 VAC is not present check the fuse

on the board and replace if necessary.

If 24 volts is present between the “R” and the “24V COM”

terminals, then check between the “W” and “24V COM”

terminals. If 24 VAC is not present on the “W” terminal check

the thermostat. If there is 24 VAC “W” terminal check the AQ

jumper to make sure it is in the “OFF” position or if the AQ

jumper suppose to be in the on position check the aquastat. If

it is open when the water line is cold it must be replaced.

Hydronic Control Board - Cooling Mode

Refer to page 10 Figure 10 for terminal descriptions.

Check to determine if 24 VAC is present across the “R” and

24V COM terminals. If 24 VAC is not present check the fuse

on the board and replace if necessary.

If 24 volts is present between the “R” and the “24V COM”

terminals, then check between the “G” and “24V COM”

terminals. If 24 VAC is not present on the “G” terminal check

the thermostat.

If there is 24 VAC between the “G” and the “24V COM”

terminals, then check the “Y” and “24V COM” terminals.

If 24 VAC is not present on the “Y” and “24V COM”

terminals, then check the thermostat.

Heater Element Is Not On

Check for 240 VAC between each of the heater elements. If

240 VAC is present, check the current draw on each heater. If

there is almost no current draw check to see if the heater is

defective.

The heater amps are as follows:

3 kW Heater = 12.5 amps 5 kW Heater = 20.8 amps

6 kW Heater = 25.0 amps 8 kW Heater = 33.3 amps

10 kW Heater = 41.6 amps

The heater design is as follows:

The 3 kW model has two 1.5 kW heater elements.

The 5 kW model has two 2.5 kW heater elements.

The 6 kW model has two 3.0 kW heater elements.

The 8 kW model has two 4.0 kW heater elements.

The 10 kW model has two 5.0 kW heater elements.

DP - Double Pole Contactor

Figure 16: Electric Heater Contactor Terminals

Designations

HP CT

1/3 0.68

1/2 1.70

Table 2: 208 / 240 Volt Blower Motor Tested FLA

HP CT

1/3 1.67

1/2 3.00

Table 3: 115 Volt Blower Motor Tested FLA

Replacing the PSC Blower Motor

1Turn off all electrical supply circuits to the fan coil unit at

the main service panel.

2Open the ceiling access panel by removing the thumb

screws.

3Remove the four (4) screws that secure the motor guard to

the control box.

4Remove the control box cover by removing the two (2)

screws that are securing the cover to the fan coil unit.

5Disconnect the blower motor power wires from the relay

and the terminal block.

6Remove the strain relief that is securing the wires to the

control box and remove the blower motor wires from the

control box.

7Remove the two screws on the blower mount plate

located on the right side, the left side, the screw on the top

center and the screw in the control box. Refer to Figure 27

for screw locations.

Figure 17: Blower Assembly Removal

8Grab the blowers and lift the panel up and pull out on the

bottom. Slide the panel down and out of the fan coil

chassis.

9Rotate the blower housing so you are looking at the wheel

from the discharge of the blower. Use a hex key to loosen

the set screws that secure the blower wheels to the motor

shaft.

10 Remove the screws that secure the both blower housings

to the blower mount plate.

11 Remove the blower motor from the mount bracket by

placing a straight edge screw driver on the “U” shaped

part of the clip. Push the clip down and away from the

bracket to pop the clip off the bracket.

To avoid personal injury or property damage, make certain

that the motor leads cannot come into contact with non-

insulated metal com

onents of the unit.

MORTEXPRODUCTSINCFORTWORTH,TX76106Page16

12 After both motor mount retaining clips have been

removed; the motor it can be removed the motor mount

plate.

Figure 18: Blower Motor Clip Removal

13 Remove both of the blower housings by sliding the

blower wheels “off” the motor shaft.

14 Replace both of the blower housings by sliding the blower

wheels “on” the motor shaft.

15 Set the new blower motor on the mount bracket. Place

one end of the retaining clip into the notch on the motor

mount bracket. Use a straight edge screw driver and a

mallet on the “U” shaped part of the retaining clip to push

the clip down and into the notch on the other side of the

bracket.

16 Set the blower housing in the correct position on the

blower mount plate and secure the blower housings with

the screws that were removed.

17 Rotate the blower housing so you are looking at the wheel

from the discharge of the blower. Center the blower

wheels in the housing then use a hex key to tighten the set

screws and secure the blower wheels to the motor shaft.

18 Grab the blowers and lift the panel up, push in on the

bottom, then pull down to set the blower mount plate in

place.

19 Replace the two screws on the blower mount plate located

on the right side, the left side, the screw on the top center

and the screw in the control box. Refer to Figure 27 for

screw locations.

20 Place the motor wires into the control box and replace the

strain relief that is securing the wires to the control box.

21 Reconnect the blower motor power wires from the relay

and the terminal block.

22 Replace the control box cover and secure with the screws

that were removed.

23 Close the ceiling access panel and secure the panel with

the thumb screws that were removed.

24 Turn on all electrical supply circuits to the fan coil unit at

the main service (House Circuit Breaker) panel.

25 Set the thermostat to the desired temperature.

SECTION VI: ACCESSORY PARTS

Part Number Description

87JUA020 HEC - HEU - LOUVERED - 40.875 X 25.375

87JUA021 HEC - HEU - LOUVERED - 46.875 X 25.375

87JUA022 HEC - HEU - LOUVERED - 53.875 X 25.375

87JUA023 HEC - HEU - LOUVERED - 60.875 X 25.375

CPNL1 HEC - NON-LOUVERED - 27.5" x 43"

CPNL2 HEC - HEU - NON-LOUVERED - 27.5"x 49"

CPNL3 HEC - HEU - NON-LOUVERED - 27.5" x 55.5"

CPNL4 HEC - HEU - NON-LOUVERED - 27.5" x 62.5"

Table 4: Accessory Parts List

To avoid personal injury take precautions not come into

contact with non-insulated electrical components.

Avoid wearing loose clothing or any items that can come in

contact with moving parts, such as the blower wheel. This

can cause serious personal injury

MORTEXPRODUCTSINCFORTWORTH,TX76106Page17

SECTION VII: BLOWER PERFORMANCE

HP Volts 0.1 0.2 0.3 0.4 0.5

1 541 482 416 357 315

2 646 598 541 482 438

3 735 694 659 597 549

4 840 804 770 735 672

5 888 851 819 785 739

1 570 480 398 327 257

2 669 588 512 450 387

3 761 691 618 557 499

4 865 797 730 667 609

5 915 851 782 724 657

1 906 837 762 701 627

2 1019 955 887 822 768

3 1101 1043 987 922 846

4 1202 1151 1098 1041 981

5 1312 1258 1209 1151 1105

1 928 836 750 689 617

2 1024 948 866 798 739

3 1131 1062 989 917 846

4 1225 1160 1091 1026 957

5 1327 1267 1211 1138 1075

1 987 922 849 769 696

2 1073 1008 945 880 817

3 1191 1127 1071 1006 949

4 1285 1241 1186 1127 1047

5 1400 1332 1290 1246 1191

HE1-**-*-DC

Electric 1.5 - 3.0 0.5 240 *K (2) 7 x 9

HE1-**-*-CC

Electric 1.5 - 3.0 0.5 240 *K (2) 7 x 9

HE1-**-*-BC

Electric 1.5 - 2.5 0.5 240 *M (2) 7 x 9

HE1-**-*-BC

Electric 1.5 - 2.5 0.33 240 *K (2) 7 x 9

(2) 7 x 8*J2400.331.5 - 2.0

HE1-**-*-AC

Electric

Nominal

Cooling Tons

Model No. Blower Motor Blower

Wheel Size Supply CFMMotor

Code Motor

Speed Tap

Table 5: HE1 Blower Performance Chart – CFM Data with a Constant Torque Motor -Without Air Filters

HP Volts 1 0.28 0.30 0.33 0.36 0.38

2 0.36 0.39 0.43 0.45 0.48

3 0.47 0.50 0.53 0.56 0.59

4 0.62 0.64 0.67 0.70 0.74

5 0.69 0.72 0.75 0.78 0.81

1 0.27 0.30 0.33 0.35 0.37

2 0.35 0.38 0.41 0.44 0.47

3 0.44 0.47 0.50 0.53 0.56

4 0.55 0.59 0.62 0.66 0.69

5 0.62 0.65 0.68 0.72 0.75

1 0.61 0.65 0.66 0.68 0.71

2 0.74 0.78 0.81 0.83 0.86

3 0.87 0.92 0.95 0.97 0.99

4 1.08 1.11 1.13 1.16 1.20

5 1.33 1.36 1.41 1.43 1.46

1 0.51 0.54 0.57 0.61 0.64

2 0.62 0.66 0.70 0.72 0.76

3 0.75 0.78 0.82 0.85 0.88

4 0.88 0.92 0.96 0.98 1.04

5 1.08 1.12 1.13 1.16 1.21

1 0.75 0.78 0.81 0.85 0.88

2 0.90 0.94 0.95 1.00 1.03

3 1.10 1.13 1.16 1.16 1.20

4 1.35 1.38 1.42 1.46 1.50

5 1.66 1.70 1.73 1.77 1.80

Motor

Code Motor

Speed Amps @

0.1 Amps @

0.2 Amps @

0.3 Amps @

0.4 Amps @

0.5

HE1-**-*-AC

Electric

Nominal

Cooling

Model No.

lower Moto Blower

Wheel

(2) 7 x 8*J2400.331.5 - 2.0

(2) 7 x 9

HE1-**-*-BC

Electric 1.5 - 2.5 0.33 240 *K (2) 7 x 9

HE1-**-*-BC

Electric 1.5 - 2.5 0.5 240 *M

(2) 7 x 9

HE1-**-*-CC

Electric 1.5 - 3.0 0.5 240 *K (2) 7 x 9

HE1-**-*-DC

Electric 1.5 - 3.0 0.5 240 *K

Table 6: HEC1 Blower Performance Chart – AMP Data with a Constant Torque Motor -Without Air Filters

MORTEXPRODUCTSINCFORTWORTH,TX76106Page18

HP Volts

1 533 485 439 397 350

2 629 589 546 508 457

3 728 694 658 625 579

4 832 801 761 727 680

5 886 857 818 786 740

1 556 486 426 363 291

2 646 593 541 476 423

3 749 699 651 598 555

4 844 798 749 704 657

5 897 854 809 764 721

1 883 834 787 737 700

2 978 926 885 834 791

3 1075 1033 991 946 905

4 1192 1149 1105 1071 1029

5 1302 1253 1213 1176 1138

1 903 845 791 732 665

2 1016 958 903 853 789

3 1118 1065 1010 958 912

4 1232 1179 1135 1089 1047

5 1310 1261 1221 1180 1137

1 901 837 781 716 658

2 992 939 876 823 753

3 1090 1043 987 934 878

4 1200 1152 1107 1061 1012

5 1297 1252 1205 1161 1111

Supply CFM

Motor

Code CFM@

0.10"

CFM@

0.20"

CFM@

0.30"

CFM@

0.40"

CFM@

0.50"

Motor

Speed Tap

HE*2***A

Hydronic

Nominal

Cooling Tons

Model No. Blower Motor Blower

Wheel Size

(2) 7 X 8*N1200.331.5 - 2.0

(2) 7 X 9

HE*2***B

Hydronic 1.5 - 2.5 0.33 120 *O (2) 7 X 9

HE*2***B

Hydronic 1.5 - 2.5 0.50 120 *R

(2) 7 X 9

HE*2***C

Hydronic 1.5 - 3.0 0.50 120 *R (2) 7 X 9

HE*2***D

Hydronic 1.5 - 3.0 0.50 120 *R

Table 7: HE2 Blower Performance Chart – CFM Data with CT Motors -Without Air Filters

1 0.52 0.56 0.61 0.65 0.70

2 0.75 0.79 0.84 0.88 0.92

3 1.02 1.06 1.08 1.14 1.21

4 1.30 1.36 1.42 1.46 1.50

5 1.53 1.56 1.63 1.66 1.71

1 0.54 0.58 0.63 0.68 0.74

2 0.71 0.76 0.81 0.88 0.94

3 1.01 1.04 1.08 1.14 1.22

4 1.32 1.37 1.45 1.49 1.54

5 1.57 1.63 1.67 1.72 1.78

1 1.39 1.44 1.51 1.53 1.55

2 1.72 1.76 1.82 1.88 1.93

3 2.20 2.25 2.29 2.32 2.41

4 2.77 2.90 2.94 3.04 3.02

5 3.54 3.53 3.64 3.68 3.65

1 1.20 1.25 1.31 1.36 1.41

2 1.59 1.62 1.68 1.71 1.76

3 1.93 1.99 2.06 2.08 2.15

4 2.52 2.57 2.61 2.66 2.74

5 3.15 3.19 3.25 3.29 3.35

1 1.21 1.29 1.32 1.38 1.44

2 1.47 1.53 1.63 1.66 1.68

3 1.89 1.93 2.01 2.04 2.08

4 2.40 2.45 2.52 2.54 2.60

5 2.86 2.96 3.02 3.04 3.10

ModelNumber Nominal

Tons

Motor

Volts1

Ph.50/60

Blower

Wheel

Motor

Code MotorTap AMPS@

0.10"

AMPS@

0.20"

AMPS@

0.30"

AMPS@

0.40"

AMPS@

0.50"

HE*2***A

Hydronic (2) 7 X 8*N1200.331.5 - 2.0

(2) 7 X 9

HE*2***B

Hydronic 1.5 - 2.5 0.33 120 *O (2) 7 X 9

HE*2***B

Hydronic 1.5 - 2.5 0.50 120 *R

(2) 7 X 9

HE*2***C

Hydronic 1.5 - 3.0 0.50 120 *R (2) 7 X 9

HE*2***D

Hydronic 1.5 - 3.0 0.50 120 *R

Table 8: HEU2 / HEC2 Blower Performance Chart – Amp Data with CT Motors -Without Air Filters

MORTEXPRODUCTSINCFORTWORTH,TX76106Page19

SECTION VIII: REPLACEMENT PARTS

Figure 19: HE1/HE3 – 18, 19, 24 Electric Heat Fan Coil Unit Repair Parts Schematic

Item # Qty. Part # Description

1 1 86HM0080FD 80-1/3-230-(2)7.00X8.00 -Selectech Blower Assembly

2 1 R68AA0003 208/240-24V Transformer

3 1 R68AC0009 TDR ADJ TYPE Delay On Make Relay - ICM #HMPS00C2X30

4 1 R68DC0001 Ground Lug

5 1 R73MH0001 3 Amp Fuse

6 1 R73MHA001 Fuse Holder

7 1 R68AB0001 Fan Relay for PSC Motor

8 1 R86CJ0170 3 KW Element (Kit - 2 EA. 1.5 kW Heater Elements with Limits)

9 1 R68CA0001 140°F Limit Switch (Opens at 140

F - Closes at 110

10 1 R68AB0019 Double Pole Electric Heat Contactor - 50 Amp Resistive

8 1 R86CJ0172 5 KW Element (Kit - 2 EA. 2.5 kW Heater Elements with Limits)

9 1 R68CA0001 140°F Limit Switch (Opens at 140

F - Closes at 110

10 1 R68AB0019 Double Pole Electric Heat Contactor - 50 Amp Resistive

8 1 R86CJ0173 6 KW Element (Kit - 2 EA. 3.0 kW Heater Elements with Limits)

9 1 R68CA0001 140°F Limit Switch (Opens at 140

F - Closes at 110

10 1 R68AB0019 Double Pole Electric Heat Contactor - 50 Amp Resistive

8 1 R86CJ0174 8 KW Element (Kit - 2 EA. 4.0 kW Heater Elements with Limits)

9 1 R68CA0001 140°F Limit Switch (Opens at 140

F - Closes at 110

10 1 R68AB0019 Double Pole Electric Heat Contactor - 50 Amp Resistive

8 1 R86CJ0175 10 KW Element (Kit - 2 EA. 5.0 kW Heater Elements with Limits)

9 2 R68CA0001 140°F Limit Switch (Opens at 140

F - Closes at 110

10 1 R68AB0019 Double Pole Electric Heat Contactor - 50 Amp Resistive

11 1 R87BAE001 Galvanized G90 Drain Pan With Coating for F.D. 30

HEU1/HEU3/HEC1/HEC3 18, 19, 24 ELECTRIC HEAT MODELS

5 KW Electric Heat

10 KW Electric Heat

DRAIN PANS

8 KW Electric Heat

3 KW Electric Heat

6 KW Electric Heat

CHILLED WATER COILS

12 DX COILS - There are too many DX coil modelsto list here.

Contact factory sales rep to obtain the correct coil for you fan coil unit.

CHILLED WATER COILS - There are too many chilled water coil modelsto list here.

Contact factory sales rep to obtain the correct coil for you fan coil unit.

Table 9: HE1//HE3 -18, 19, 24 Electric Heat Fan Coil Repair Parts List

MORTEXPRODUCTSINCFORTWORTH,TX76106Page20

Figure 20: HE1/HE3 -25, 30, 31 Electric Heat Fan Coil Unit Repair Parts Schematic

Item # Qty. Part # Description

1 1 86HM0080FD 80-1/3-230-(2)7.00X9.00 -Selectech Blower Assembly

2 1 R68AA0003 208/240-24V Transformer

3 1 R68AC0009 TDR ADJ TYPE Delay On Make Relay - ICM #HMPS00C2X30

4 1 R68DC0001 Ground Lug

5 1 R73MH0001 3 Amp Fuse

6 1 R73MHA001 Fuse Holder

7 1 R68AB0001 Fan Relay for PSC Motor

8 1 R86CJ0170 3 KW Element (Kit - 2 EA. 1.5 kW Heater Elements with Limits)

9 1 R68CA0001 140°F Limit Switch (Opens at 140

F - Closes at 110

10 1 R68AB0019 Double Pole Electric Heat Contactor - 50 Amp Resistive

8 1 R86CJ0172 5 KW Element (Kit - 2 EA. 2.5 kW Heater Elements with Limits)

9 1 R68CA0001 140°F Limit Switch (Opens at 140

F - Closes at 110

10 1 R68AB0019 Double Pole Electric Heat Contactor - 50 Amp Resistive

8 1 R86CJ0173 6 KW Element (Kit - 2 EA. 3.0 kW Heater Elements with Limits)

9 1 R68CA0001 140°F Limit Switch (Opens at 140

F - Closes at 110

10 1 R68AB0019 Double Pole Electric Heat Contactor - 50 Amp Resistive

8 1 R86CJ0174 8 KW Element (Kit - 2 EA. 4.0 kW Heater Elements with Limits)

9 1 R68CA0001 140°F Limit Switch (Opens at 140

F - Closes at 110

10 1 R68AB0019 Double Pole Electric Heat Contactor - 50 Amp Resistive

8 1 R86CJ0175 10 KW Element (Kit - 2 EA. 5.0 kW Heater Elements with Limits)

9 2 R68CA0001 140°F Limit Switch (Opens at 140

F - Closes at 110

10 1 R68AB0019 Double Pole Electric Heat Contactor - 50 Amp Resistive

11 1 R87BAE002 Galvanized G90 Drain Pan With Coating for F.D. 38

10 KW Electric Heat

CHILLED WATER COILS

DRAIN PANS

DX COILS

HEU1/HEU3/HEC1/HEC3 25, 30, 31 ELECTRIC HEAT MODELS

3 KW Electric Heat

5 KW Electric Heat

6 KW Electric Heat

CHILLED WATER COILS - There are too many chilled water coil models to list here.

Contact factory sales rep to obtain the correct coil for you fan coil unit.

12 DX COILS - There are too many DX coil models to list here.

Contact factory sales rep to obtain the correct coil for you fan coil unit.

8 KW Electric Heat

Table 10: HE1/HE3 -25, 30, 31 Electric Heat Fan Coil Unit Repair Parts List

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