Winchester WEFC SERIES Guide

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USERS INFORMATION MANUAL
DOWNFLOW / HORIZONTAL For Installation In:
SINGLE STAGE ELECTRIC FURNACE 1. Manufactured (Mobile) Home 2. Recreational Vehicle
3. Modular Homes & Buildings 4. Residential Homes
MODELS: WEFC & WEFX SERIES
LIST OF SECTIONS – USERS INFORMATION MANUAL
1 – General 1 4 – Start Up & Shutdown Instructions 4
2 – Safety 2 5 – Owner Maintenance 5
3 – Owners Information & Seasonal Information 3 6 – Blower Performance 13
LIST OF SECTIONS – SERVICE AND MAINTENANCE MANUAL
1 – Safety 7 5 – Trouble Shooting 11
2 – Furnace Maintenance 8 6 – Blower Performance 14
3 – Furnace Controls 9 8 – Accessories Parts 22
4 – Sequence of Operation 10 8 – Replacement Parts 23
LIST OF FIGURES
1 – Component Locations 3 10 – Control Box and Blower Component Locations 10
2 – Return Air Louvered Door 5 11 – PSC Motor Speed Tap Isolation Relay 11
3 – Return Air Louvered Door Filter Locations 5 12 – X-13 Motor Terminal Locations 12
4 – Return Air Louvered Door – Aligning Door 5 13 – Replacement Parts Drawing 1/3 HP PSC Motor 23
5 – Coil Cabinet Pleated Filter Location 6 14 – Replacement Parts Drawing 1/3 HP X-13 Motor 24
6 – Aligning Coil Cabinet door and Thumb Screw 6 15 – Replacement Parts Drawing 1/2 HP X-13 Motor 25
7 – 97-FG Frame and Grille “A” Coil Filter Location 6 16 – Replacement Parts Drawing 3/4 HP X-13 Motor 26
8 – Control Box Cover 8 17 – Replacement Parts Drawing 1/2 HP PSC Motor 27
9 – Blower Assembly and Mounting Screw Location 8 18 – Replacement Parts Drawing 3/4 HP PSC Motor 28
LIST OF TABLES
1 – X-13 Motor Terminal Connections 12 8 – Blower Performance 3/4 HP - PSC Motor 21
2 – Factory Speed Tap Settings 13 9 – Accessory Parts List 22
3 – Blower Performance 1/3 HP - PSC Motor 14 10 – Replacement Parts List – 1/3 HP - PSC Blower Motor 23
4 – Blower Performance 1/3 HP - X-13 Motor 15 11 – Replacement Parts List – 1/3 HP - X-13 Blower Motor 24
5-1 – Blower Performance 1/2 HP - X-13 Motor 16 12 – Replacement Parts List – 1/2 HP - X-13 Blower Motor 25
5-2 – Blower Performance 1/2 HP - X-13 Motor 17 13 – Replacement Parts List – 3/4 HP - X-13 Blower Motor 26
6 – Blower Performance 3/4 HP - X-13 Motor 18 14 – Replacement Parts List – 1/2 HP - PSC Blower Motor 27
7-1 – Blower Performance 1/2 HP - PSC Motor 19 15 – Replacement Parts List – 3/4 HP - PSC Blower Motor 28
7-2 – Blower Performance 1/2 HP - PSC Motor 20
CONTACT INFORMATION
Contact us by mail: Hamilton Home Products www.hamiltonhomeproducts.com
P.O. Box 185 Phone: [phone]
Canal Winchester, OH 43110
SECTION I: GENERAL
The following list includes important facts and information
regarding the electric furnace and its inclusions.
1. Furnace is rated at 240 volts AC at 60 Hertz
2. Furnace is the same cabinet size for all models
3. All furnaces are equipped with a blower for A/C or Heat
Pump operation
4. This furnace is designed for downflow and horizontal
application
5. This furnace must not be operated without furnace door
installed
NOTE: This furnace and its components listed on the A/C and
Heat Pump equipment sticker were listed in combination as a
system by ETL for the United States.
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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USERS MUST READ ALL INSTRUCTIONS IN THIS
MANUAL AND THIS MANUAL MUST BE SAVED FOR
FUTURE REFERENCE
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: indicates 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 electric furnace must be kept clear and free of
combustible materials, gasoline and other flammable
vapors and liquids.
2. Insulating materials may be combustible. The furnace
must be kept free and clear of insulating materials. The
furnace 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
furnace.
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 furnace
and contact a qualified contractor, installer, or service
agency.
5. NEVER - Store flammable materials of any kind near
your furnace. 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, powered cleaners, etc. near the furnace. These
chemicals can cause corrosion of the furnace sheet metal
and the electric heaters, the blower and the electrical
controls.
7. NEVER – Use the area around the furnace as a storage
area for items which could block or obstruct the normal
air flow to the furnace or the space around the furnace.
The flow of air is required for safe and proper operation.
Never block or obstruct air openings used for ventilation
and cooling of the furnace electrical components.
8. Refer to the furnace rating plate for the furnace 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 furnace, death,
personal injury, and/or property damage.
11.If the furnace is installed in a residential garage it must be
installed so that the electric heaters are located not less
than 18 inches above the floor and the furnace must be
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
dama
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e,
p
ersonal in
j
ur
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or loss of life.
Do not use this furnace if any part has been under water. A
flood damaged furnace is extremely dangerous. Attempts
to use the furnace can result in a fire.
A qualified contractor, installer, or service agency must be
contacted to inspect the furnace for any water damage and
replace all components, control system parts, or electrical
parts that have been damaged. If enough damage is
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,
the furnace ma
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need to be re
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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 up with changing mobile home, modular home
and HUD 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 Furnace Works
This furnace may be installed in the downflow or the
horizontal position. Figure 1 shows a typical model in the
downflow position. The furnace is equipped with a relay,
sequencer, transformer, circuit breakers, and a blower
assembly. The transformer provides 24 VAC to the
thermostat. When the thermostat calls for heat the relay(s)
energize sending 240 VAC to the electric heaters causing them
to get hot. The indoor fan motor is then energized on the low
speed tap and the circulating blower draws cool air from the
living space, passes it across the heater coils and circulates the
warmed air through the duct work to the house. When the
blower stops the heating cycle has ended and the furnace is
ready for the next call for heat to start the next cycle.
The furnace is equipped with the controls necessary for proper
and safe operation. The various components referred to in this
manual are identified in Figure 1.
Figure 1: Component Locations
Examination of the Furnace
The homeowner should perform a visual examination of the
furnace every month for any defects or problems. The items to
be inspected are:
1. The physical support of the furnace is sound without
sagging cracks, gaps, etc. around the base so as to
provide a seal between the support and the base.
2. The furnace 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 furnace casing.
4. The furnace must be serviced by qualified personnel
annually, preferably at the start of each heating
season.
The Service Technician
The furnace’s best friend is a qualified service technician. If
the unit gives any indication of improper operation, call the
service technician. The service technician is allowed to
perform the normal routine care of your furnace. He can detect
potential problems and make corrections before trouble
develops. Preventative maintenance of this type will allow the
furnace to operate with minimal concerns to the homeowner
and will add years of comfort.
Warranty and Responsibilities
It is the sole responsibility of the home owner to make certain
the furnace has been properly installed and adjusted to operate
properly.
The manufacturer warrants the furnace 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 furnace adjustments, adding
parts that are not listed for use with this furnace, improper
operating procedures by the user.
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 furnace.
2. Correcting wiring problems in the electrical circuit to
the furnace.
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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3. Resetting circuit breakers or on/off switches used for
servicing.
4. Furnace 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 furnace.
5. Adjusting or calibrating the thermostat.
6. Problems caused by construction debris which has
fallen into the furnace.
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 homeowner should establish a firm understanding of these
responsibilities with the installer or service company so there
is no misunderstanding at a later time.
While you are away
The furnace is equipped with safety shutoff devices which will
shut off the electric heaters in case of a malfunction. For this
reason it is never practical to assume the furnace will operate
unattended for a long period of time.
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 furnace is operating properly. This may prevent water
pipes from freezing.
The Furnace Fails to Operate Properly
If any abnormalities are observed while the furnace 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 the 3 amp fuse on the right side of the control
box to determine if it has blown. A replacement fuse
can be purchased at your local electronic, automotive
or home center retailer.
4. Make sure the air filters are clean, return grilles are
not obstructed, and supply air registers are open.
If the cause of the malfunction is not obvious do not attempt to
service the furnace yourself. Call a qualified service agency /
company to repair the furnace.
When Calling For Service Assistance
Providing the service agency with detailed information about
the furnace and problem you are having can save you 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.
SERVICE AGENCY INFORMATION
Fill in Below
COMPANY:
ADDRESS:
TELEPHONE (DAYTIME):
TELEPHONE (EMERGENCY)
SECTION IV: STARTUP AND SHUTDOWN
INSTRUCTIONS
Read the instructions below before trying to start the
furnace.
A. BEFORE OPERATING; check around perimeter of
the furnace 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 furnace until
vapors have been ventilated and removed from the
area of the furnace.
B. CHECK THE FURNACE; visually check the furnace
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 furnace to make sure
there are no gaps or holes and ducts are securely
fastened to the furnace.
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. Remove the furnace door.
5. Turn off the circuit breakers on the appliance control
box.
6. Remove the control box door.
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 door.
10. Turn the circuit breakers to the on position.
11. Replace the furnace door.
Should overheating occur turn the circuit breakers on the
control box and the main electrical service entrance (Circuit
Breaker Box) to the off position. Call qualified service
personnel to trouble shoot and repair the furnace. DO NOT
allow the furnace to continue to cycle on the limit controls.
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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12. Turn the circuit breakers in the main service
disconnect box to the on position.
13. Set the thermostat to the desired setting.
Turn OFF / Shut Down 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. Remove the furnace door.
4. Turn off the circuit breakers on the appliance control
box.
5. Replace the furnace door.
SECTION V: OWNER MAINTENANCE
All appliances need maintenance at the beginning of each
heating season in order to operate properly. The annual service
must be performed by qualified service personnel. The
homeowner is expected to perform general cleaning of the
exterior surfaces, clean dust from the louvers in the return air
door 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 if you have a louvered
return air door.
Figure 2: Return Air Louvered Door Air Filter Location
Figure 3: Return Air Louvered Door 20” x 20” x 1” Air
Filters
Return Air Grille Air Filters
Follow these easy steps to replace the filters located in the
return air grille:
1. Follow the procedure “Turn OFF / Shut Down the
Appliance” in the Startup and Shutdown Instructions
section of these instructions.
2. Remove the thumb screw at the top of the return air
grille by turning it counter-clockwise.
3. Let the top of the door fall towards you then lift up
slightly pulling towards you and set the door on the
floor.
4. Remove the top air filter first, and then remove the
bottom air filter. These filters are disposable filters.
DO NOT attempt to clean the filters and reuse them.
5. Remove the new pleated air filters from the plastic
wrap they come in.
6. Slide the bottom air filter in place in the door.
7. Place the top air filter in the door so both air filters
are installed as shown in Figure 3.
8. Lift the door up to the cooling cabinet and align the
slots on the bottom of the door with the tabs on the
mounting bracket on top of the furnace. Refer to
Figures 4 and 5.
9. Push the grille forward until the grille is touching the
cabinet and align the door so it is even with the sides
of the cabinet. Aligning the grille with the cabinet is
an important step in order to align the screw hole
with the thumb screw. Refer to Figure 6.
10. Turn the thumb screw clockwise to screw it into the
hole until the plastic head of the thumb screw
snuggly fits against the grille. DO NOT over tighten
the thumb screw as it will make it difficult to remove
at a later time.
11. Follow the instructions to “Turn ON / Start the
Appliance” in the Startup and Shutdown section of
these instructions.
Figure 4: Aligning The Sides Of The Louvered Filter Door
and Reinstalling Thumb Screw.

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Coil Cabinet Top Air Filters
Follow these easy steps to replace the filters located in the top
of the coil cabinet:
1. Follow the procedure “Turn OFF / Shut Down the
Appliance” in the Startup and Shutdown Instructions
section of these instructions.
2. Remove the thumb screw at the top of the louvered
door by turning it counter-clockwise.
3. Let the top of the door fall towards you then lift up
slightly pulling towards you and set the door on the
floor.
4. Remove the air filter first at the top of the coil
cabinet. The 20” x 24” x 2” filters is a disposable
filter. DO NOT attempt to clean the filter and reuse
it.
5. Remove the new 20” x 24” x 2” pleated air filter
from the plastic wrap they come in.
6. Slide the air filter into the filter rack at the top of the
coil cabinet as shown in Figure 5.
7. Lift the door up to the cooling cabinet and align the
slots on the bottom of the door with the tabs on the
mounting bracket on top of the furnace.
8. Push door forward until the door is touching the
cabinet and align the door so it is even with the sides
of the cabinet. Aligning the door with the cabinet is
an important step in order to align the screw hole
with the thumb screw. Refer to Figure 6.
9. Turn the thumb screw clockwise to screw it into the
hole until the plastic head of the thumb screw
snuggly fits against the door. DO NOT over tighten
the thumb screw as it will make it difficult to remove
at a later time.
10. Follow the “Turn ON / Start the Appliance” in the
Startup and Shutdown Instructions section of these
instructions.
Figure 5: Coil Cabinet Top Return Pleated Air Filter
Location.
Figure 6: Aligning The Sides Of The Solid Coil Cabunet
Door and Reinstalling Thumb Screw.
Figure 7:“A” Coil Filters
NOTE: Coil Filters are used with the 97-FG Frame and Grille
assemblies only.
Position filters over the coil as shown in Figure 7.
Homeowners must be instructed as to how to clean and
reinstall washable or replaceable filters for good preventive
maintenance. Care must be taken that the edges of the
washable or replaceable filter are resting on the protruding
edges of the metal plates at each end of the aluminum fins.
This allows a ½” gap between the filter and the coil surface to
prevent dirt from wicking from the filter to the coil.

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SERVICE AND MAINTENANCE MANUAL
SECTION I: SAFETY
THE HOMEOWNERS AND/OR APPLIANCE USERS
MUST STOP HERE!
This section has been designed to assist a qualified service
agency in performing service and maintenance on this
appliance.
The homeowners and/or the 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: indicates 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 electric furnace may have a dual 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 furnace
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 once the furnace
door has been removed. Moving parts can cause serious
injury if clothing or body parts get caught in the moving
part.
The manufacturer will not be responsible for any
repairs due to improper parts changes, improper
maintenance, improper furnace adjustments or
improper modifications made 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 furnace. 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 a qualified contractor, installer, or
service agency.
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, death, or property damage.
A fire or electrical hazard may result causing property
damage, personal injury or loss of life.

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SECTION II: FURNACE MAINTENANCE
The interior sections of the furnace must be cleaned and
adjusted by a qualified service contractor once a year or before
the start of each heating 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 supply air duct system for excessive dust, dirt or
debris
4. The return air duct system for excessive dust, dirt or
debris
5. All electrical wiring for wear and/or damage.
6. Check the air conditioning evaporator coil for dust,
debris or damage.
7. Check the evaporator coil drain pan for proper
drainage to prevent water backup into the furnace.
8. The furnace casing and all interior sheet metal panels
or dividers.
Furnace Cleaning Procedure
1. Follow the instructions exactly as shown for “Turn
ON / Start Appliance” and “Turn OFF / Shut Down
the Appliance” in this manual to properly operate this
appliance.
2. Remove the access door on the front of the furnace.
3. Remove the access door on the front of the
evaporator coil cabinet.
4. Remove the screw on the right side of the control box
cover and remove the control box cover. Refer to
Figure 8.
5. Remove the blower mounting screw on the right front
side of the blower mounting plate and slide the
blower out of the furnace. Refer to Figure 9.
Figure 8: Control Box Cover
Figure 9: Blower Mounting Screw
6. Use a vacuum cleaner and a small brush to remove
any dirt and debris from the blower compartment.
7. Check in the area below the blower compartment
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.
8. Check the blower wheel for dust and debris. Use the
brush and the vacuum cleaner to remove any dust or
debris from the wheel. Be careful not the move or
accidentally remove the blower wheel balance weight
located on the wheel fins. If it is moved or removed it
will cause the blower wheel to vibrate. If the wheel is
vibrating, you must replace it.
ELECTRICAL SHOCK, FIRE HAZARD
Failure to follow the safety warnings exactly could result
in dangerous operation, serious injury, death, or
property damage.
Improper servicing could result in dangerous operation,
serious injury, death, and/or property damage.
Before servicing, disconnect all electrical power to
the furnace. Make sure you disconnect both power
supplies if the furnace has a dual power supply
circuit. Dual circuits may be used on the 15kW,
17kW and 20kW furnaces.
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 future furnace
operation.
Placing jumper wires between the RED and
WHITE wires at the furnace 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, death, and/or property damage.

WINCHESTERHamiltonHomeProductsPage9
9. 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 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.
10. Check and clean with the brush and vacuum cleaner
any dust in the supply and return ducts as far as you
can reach. If these ducts look like they have an
excessive amount of dust, dirt or debris you should
recommend the ducts be cleaned to the homeowner
or user.
11. Check and clean any dust, dirt, or debris from all of
the controls and all of the surfaces in the control box.
Dust or dirt left on the components will cause the
components to operate at a much hotter temperature
resulting in premature component failure.
12. Check the evaporator coil compartment for dirt, dust
or debris and remove any that exists.
13. 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.
14. Remove any excess water that may have spilled from
checking the evaporator condensate drain.
15. Reinstall the blower assembly and secure the
assembly using the screw that was removed in step 5.
16. Reinstall the control box cover and secure it to the
control box with the screw removed in step 4.
17. Reinstall the access door on the front of the furnace.
18. Reinstall the access door on the front of the
evaporator coil cabinet or grille and frame assembly.
19. Follow the instructions exactly as shown in “Startup
and Shutdown Section” in this manual to properly
startup this appliance.
SECTION III: FURNACE CONTROLS
This section discusses the furnace controls and how they
operate. Refer to Figure 10 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 Relays – 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).
3. Cooling Sequencer – The cooling sequencer is used
only when 24 VAC is on the “G” terminal from the
thermostat. The sequencer controls the blower 28 sec
on and 14 sec off time delay.
4. Circuit breakers – The circuit breakers are designed
as over-current protection for the electric heaters
only. The circuit breakers MUST NEVER be used for
over-current protection for the transformer, 24 VAC
circuit, or the blower motor.
5. 3 Amp Fuse – This fuse is used for over-current
protection of the 24 VAC circuit.
6. 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.
7. PSC Motor Isolation Relay - This relay is used for
the PSC motor. This relay is used as an isolation
relay to isolate the cooling speed tap from the heating
speed tap on the PSC 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 with a
call from the “G” terminal on the thermostat.
8. PSC motor Time Delay Sequencer - The heating
sequencer is used only when 24 VAC is on the “G”
terminal from the thermostat. The sequencer controls
the blower 28 sec on and 14 sec off time delay.

WINCHESTERHamiltonHomeProductsPage10
Figure 10: Component Locations
SECTION IV: SEQUENCE OF OPERATION
Continuous Blower
The thermostat has a manual 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 on the thermostat
causing the sequencer to energize starting the blower motor
delay on. When the sequencer has completed the delay on
cycle the contacts will close sending 24 VAC to the selected
indoor blower motor speed tap.
This will cause the indoor blower to operate continuously until
the 24 VAC signal has been removed by changing the fan
operation from continuous to auto.
Intermittent Blower - Cooling
The thermostat has a manual 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 through the sequencer to the motor and the motor
will operate on the speed tap that has been selected for “G”.
The sequencer “ON” delay for the indoor fan motor is 28 sec
and the “Off” delay is 14 sec.
The Heating Cycle
When the thermostat is in the HEAT mode, the fan is set to
AUTO.
When the thermostat calls for heat (X-13 Blower Motor)
1. The thermostat closes the circuit between the “R” and
“W” terminals.
2. 24 VAC is sent from the “W” terminal, through the
white thermostat wire to the white pigtail wire on the
furnace.
3. 24 VAC is sent from the W2 terminal through the
black thermostat wire to the white pigtail wire on the
furnace. Used on the 15 kW, 17 kW and 20 kW
models only.
4. 24 VAC is sent through the white pigtail wire to the
24 VAC coil on the heater relay(s).
5. This signal energizes the heater relays closing the
contacts to the heaters.
6. 240 VAC is sent from the relay contacts through the
limit switch(s) to the heater element(s).
7. At the same time, 24 VAC is sent from 24 VAC
heater relay coil through a white wire connected to
the low speed tap on the blower motor. The indoor
fan motor is energized on low speed after a 5 sec on
delay.
When the thermostat call for heat has been satisfied
1. The thermostat opens the circuit between the “R” and
“W” terminals.
2. 24 VAC is removed from the “W” terminal on the
thermostat and the white thermostat wire that is
connected to the furnace pigtail wire.
3. The thermostat opens the circuit between the “R” and
“W2” terminals.
4. 24 VAC is removed from the “W2” terminal on the
thermostat and the black thermostat wire that is
connected to the furnace pigtail wire.
5. 24 VAC is removed from the white pigtail wire and
the 24 VAC coil on the heater relay(s)