Iec Modular hi-rise replacement series Instruction manual

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Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

miniReStoramod™

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

Warnings and Cautions

It is the responsibility of the end user to properly characterize and

dispose of all waste materials according to applicable regulatory

and legal entities. Where reasonable, safe, and compliant with

local regulatory and legal requirements, IEC encourages recycling

materials when disposing of its products.

International Environmental Corporation (IEC) works continually

to improve its products. As a result, the design and specications

of each product may be changed without notice and may not be

as described herein. Please contact IEC for information regarding

current design and product specications. Statements and other

information contained herein are not express warranties and do not

form the basis of any bargain between the parties but are merely

IEC’s opinion or commendation of its products. Manufacturer’s

standard limited warranty applies.

11. All eld wiring should be done in

accordance with governing codes and

ordinances. Any modication of the unit

wiring without factory authorization will

void all of the factory warranties and will

nullify any agency listings.

12. The manufacturer assumes no responsibility

for any damages and/or injuries resulting

from improper eld installation and/or

wiring.

13. Proper safety procedures should be

followed regarding ventilation and safety

equipment. The manufacturer’s directions

should be followed for the products being

used.

14. CAUTION: The air vent provided on the unit

is not intended to replace the main system

air vents and may not release air trapped

in other parts of the system. Inspect the

entire system for potential air traps and vent

those areas as required, independently.

In addition, some systems may require

repeated venting over a period of time to

properly eliminate air from the system.

15. Failure to provide proper water quality will

void the fan coil unit’s warranty.

1. No attempt should be made to handle, install,

or service any unit without following safe

practices regarding mechanical equipment.

2. WARNING: Wear eye, hand and limb

protection at all times during demolition and

installation.

3. WARNING: Have appropriate permits and

stafng present for brazing, sheet metal

work, wiring, etc.

4. WARNING: Disconnect electrical service at

breaker panel, and lockout appropriately. Be

sure that electrical wires do not make

contact with any other conductive surfaces.

5. WARNING: Locate cold and/or hot water

isolation valves, and turn-off all supply

water to coil(s). If isolation valves fail to

completely close, it may be necessary to

depressurize risers below the oor being

renovated; and replace isolation valves

before proceeding with re-pressurization

and demolition.

6. CAUTION: Pressurized hot water can scald

or spray into your eyes, causing permanent

injury.

7. CAUTION: Toxic residues and loose particles

resulting from manufacturing and eld piping

techniques such as joint compounds,

soldering ux, and metal shavings may be

present in the unit and the piping system.

Special consideration must be given to

system cleanliness when connecting to solar,

domestic or potable water systems.

8. CAUTION: Hose connection torque

requirements are 350 in. lbs. +10/-0 in. lbs.

to prevent leaks, and incidental damage from

over-tightening.

9. All installations should be made in

compliance with all governing codes and

ordinances. Compliance with all codes is the

responsibility of the installing contractor.

10. The manufacturer assumes no responsibility

for undesirable system operation due to

improper system design, equipment or

component selection, and/or installation of

ductwork, grilles, and other related

components.

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

Table of Contents

20 Water Treatment

20 Water System Balancing

20 Controls Operation

SECTION FIVE — Routine Maintenance

21 Motor/Blower Assembly

Coils

Electric Resistance Heater Assembly

Electrical Wiring and Controls

Valves and Piping

Filters, Throwaway (including MERV)

Filters, Permanent

Drain

Replacement Parts

SECTION SIX — Checklists

25 Receiving and Inspection

25 Handling and Installation

25 Cooling/Heating Connections

25 Ductwork Connections

25 Electrical Conditions

25 Unit Start-Up

25 Recommended Spare Parts

(per 10 units)

26 Terms and Conditions

2 Warnings and Cautions

SECTION ONE — Receipt, Unpacking, &

Inspection

4 Receipt

4 Unpacking and Inspection

5 Handling

6 Potential Unit Congurations

7 Special Arrangment Options

SECTION TWO — Product Line Specic

Demolition & Installation

10 Demolition, Step-by-Step Guide

11 Installation

Riser to Unit Installation

14 Riser to Drain Installation

SECTION THREE — Finishing Installation

Grille/Ductwork Installation

15 Electrical Connections

16 Exposed Unit Touch-up and

Repainting

SECTION FOUR — Start-Up

16 Operating Conditions

17 Cooling/Heating System

17 Air System Balancing

17 ECM Blower

18 Motor Control Voltage – 3-Speed

Relay Board – Factory Settings

Motor Control Voltage – Proportional/

Analog Thermostat Settings

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION ONE — Receipt, Unpacking, & Inspection

Receipt

International Environmental Corporation fan coil units

represent a prudent investment offering trouble-free

operation and long service with proper installation,

operation, and regular maintenance.

Your equipment is initially protected under the

manufacturer’s standard warranty; however, this

warranty is provided under the condition that the steps

outlined in this manual for initial inspection, proper

installation, regular periodic maintenance, and everyday

operation of the equipment be followed in detail. This

manual should be fully reviewed in advance before initial

installation, start-up, and any maintenance. Should

any questions arise, please contact your local sales

representative or the factory BEFORE proceeding.

The equipment covered by this manual is available with a

variety of options and accessories. Consult the approved

unit submittals, order acknowledgement, and other

manuals for details on unit options and accessories.

The equipment must always be properly supported.

Temporary supports used during installation or service

must be adequate to hold the equipment securely.

All power must be disconnected before any installation

or service is attempted. More than one power source

may be supplied to a unit. Only a single, standard

thermostat should be supplied power by the unit. Any

other remote mounted device should NOT be powered

by the fan coil unit.

Never wear bulky or loose tting clothing when working

on any mechanical equipment. Gloves should be worn

for proper protection against heat and other possible

injuries. Safety glasses or goggles should always be

worn when drilling, cutting, or working with chemicals

such as refrigerants or lubricants.

Never pressurize any equipment beyond specied test

pressures. Always pressure test with an inert uid or

gas such as clear water or dry nitrogen to avoid possible

damage or injury in the event of a leak or component

failure during testing.

Always protect adjacent ammable material when

welding or soldering. Use a suitable heat- shield

material to contain sparks or drops of solder. Have a re

extinguisher readily available.

The manufacturer assumes no responsibility for personal

injury or property damage resulting from improper or

unsafe practices during the handling, installation, service,

or operation of any equipment.

Unpacking and Inspection

All units are carefully inspected at the factory throughout

the manufacturing process under a strict detailed quality

assurance program, and, where possible, ALL major

components and sub-assemblies are carefully tested for

proper operation and veried for full compliance with

factory standards. Operational testing of some customer-

furnished components such as electronic control valves

and digital controllers may be a possible exception.

Each unit is carefully packaged for shipment to avoid

damage during normal transit and handling. Equipment

should always be stored in a dry place. The deco panel

should also be stored in the proper orientation as marked.

All shipments are made F.O.B. factory and is the

responsibility of the receiving party to inspect the

equipment upon arrival. Any obvious damage to the

contents should be recorded on the bill of lading and a

claim should be led with the freight carrier.

After determining the condition of the packaging exterior,

carefully inspect packaging for hidden damage. At this

time, check to make sure that “furnished only” items such

as thermostats, grilles etc. are accounted for, whether

packaged separately or shipped at a later date. Any

hidden damage should be recorded and immediately

reported to the carrier and a claim should be led. In the

event a claim for shipping damage is led, the unit, and

all packing must be retained for physical inspection by

the freight carrier. All equipment should be stored in the

factory packaging with internal packing in place until

installation.

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION ONE — Receipt, Unpacking, & Inspection, Cont’d.

At the time of receipt, the equipment type and

arrangement should be veried against the order

documents. Should any discrepancy be found, the local

sales representative should be notied immediately so

that proper action may be taken. Should any questions

arise concerning warranty repairs, the factory must be

notied BEFORE any corrective action is taken. Where

local repairs or alterations can be accomplished, the

factory must be fully informed of the extent and expected

cost of those repairs before work is begun. Where factory

operations are required, the factory must be contacted

for authorization to return equipment and a Return

Authorization Number will be issued. Unauthorized return

shipments of equipment and shipments not marked with

an authorization number will be refused. In addition, any

claims for unauthorized expenses will not be accepted

by the manufacturer.

Handling

The units covered in this manual are identied by a tag on

top of the unit which shows the oor and /or room riser

number for which each unit is designed. Units should not

be installed at locations other than that marked on the unit

identication tag. Should any questions arise regarding

unit conguration, contact the sales representative or the

factory BEFORE proceeding.

While all equipment is designed and fabricated with

sturdy materials and may present a rugged appearance,

great care must be taken to assure that no force or

pressure be applied to the coil or piping during handling.

Depending on the options and accessories, some units

could contain delicate components that may be damaged

by improper handling. Lifting or supporting the cabinet

only at the top and bottom should be avoided to maintain

the straight and square cabinet alignment.

The equipment covered in this manual IS NOT suitable

for outdoor installations. The equipment should never be

stored or installed where it may be subjected to a hostile

environment such as rain, snow, or extreme temperatures.

During and after installation, special care must be taken

to prevent foreign material such as paint, plaster, drywall

dust, or any other debris from being deposited anywhere

in the unit, including but not limited to motor, blower

wheels or coil. Failure to do so may have serious, adverse

effects on the unit operation or user, and in the case of

the motor and blower assembly, may result in immediate

or premature failure. All manufacturer’s warranties are

void if foreign material is allowed to be deposited on the

motor or blower wheels of any unit. Some units and/or job

conditions may require some form of temporary covering

during construction.

While the manufacturer does not become involved

in the design and selection of support methods and

components, it should be noted that unacceptable system

operating characteristics and/or performance may result

from improper or inadequate unit structural support. Due

to variations in building construction, oor plans, and unit

congurations, each installation is different. The actual

step-by-step method of demolition and installation may

vary from unit to unit.

Shipping screws and braces must be removed before the

unit is installed.

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION ONE — Receipt, Unpacking, & Inspection, Cont’d.

Potential Unit Congurations

NOTE: Risers can not be installed on the Return Air side of the cabinet. (Front)

Figure 1. Air Arrangements

NOTES: 1. Risers pictued are shown for reference purposes only and adhere to the IEC

standard convention.

2. MRY/MIY equipment is designed to use existing risers, so risers are typically not

sold with these models.

3. Riser supply-return configurations and temperature should be labeled prior to

demolition, and must be verified prior to installation, as they may differ from the

IEC standard convention.

Single-side Supply

Sup

Ret

Sup

Ret

Sup

90°

Sup

Ret

Sup

90°

Sup

Ret

Sup

Ret

Sup

Ret

Sup

90°

Single-side and Top Supply

Top Supply Only

Sup

Ret

Supply

Ret

Sup

Ret

Sup

90°

Sup

Ret

Sup

Supply

90°

Sup

Ret

Sup

Ret

Sup

Ret

Supply

90°

Ret

Sup

Ret

Supply

Sup

90°

Sup

Ret

Supply

Ret

90°

Ret

Sup

Ret

Supply

Ret

90°

Rear

Riser Location

MOD

CABINET Right

Front

Left

HR = Hot Water Return

HS = Hot Water Supply

D = Drain

CR = Cold Water Return

CS = Cold Water Supply

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION ONE — Receipt, Unpacking, & Inspection, Cont’d.

Special Arrangement Options

Single-side Supply Single-side and Top Supply

Ret

Sup

Ret

Sup

Ret

Sup

90°

Ret

Sup

Ret

Sup

Ret

Sup

90°

Ret

Sup

Ret

Sup

Ret

Sup

90°

Ret

Sup

Ret

Sup

Ret

Sup

90°

Ret

Sup

Ret

Sup

Ret

Sup

90°

Sup

Ret

Sup

Ret

Sup

Ret

Sup

Ret

Sup

90°

Supply

Ret

Sup

Ret

Sup

Ret

Sup

90°

Supply

Ret

Sup

Ret

Sup

Ret

Sup

90°

Supply

Ret

90°

Sup

Supply

Ret

Sup

Ret

Sup

Ret

Sup

90°

Supply

Ret

Sup

90°

Sup

Ret

Sup

Supply

Special Arrangement Options (Cont’d on next page)

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION ONE — Receipt, Unpacking, & Inspection, Cont’d.

Special Arrangement Options

Double-side Supply

Special Arrangement Options (Cont’d on next page)

Sup

Ret

Sup

Ret

Sup

90°

Sup

Ret

Sup

Ret

Sup

Ret

Sup

90°

Sup

D2 D2

Ret

90°

Sup

Ret

Sup

90°

Sup

Ret

Sup

H2 H2

Ret

90°

Sup

Ret

Sup

90°

Sup

Ret

Sup

90°

Sup

Ret

Sup

Ret

Sup

Ret

Sup

Ret

90°

Ret

Sup

Ret

Sup

Ret

90°

Ret

Sup

Double-side and Top Supply

Sup

Ret

Sup

Ret

Sup

90°

Sup

Supply

Ret

Sup

Ret

Sup

Ret

Sup

90°

Sup

Supply

SupplySupply

Ret

90°

Sup

Supply

Sup

Ret

Sup

90°

Sup

Ret

Sup

Supply

J3 J3

Ret

90°

Sup

Supply

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION ONE — Receipt, Unpacking, & Inspection, Cont’d.

Special Arrangement Options

Sup

Ret

Sup

90°

Sup

Ret

Sup

Supply

90°

Sup

Ret

Sup

Ret

Sup

Supply

Sup

Ret

Sup

Ret

90°

Ret

Sup

Supply

Sup

Ret

Sup

Ret

90°

Ret

Sup

Supply

Triple-side Supply

Sup

Ret

Sup

Ret

Sup

90°

Sup

Ret

Sup

Ret

90°

Ret

Sup

NOTES: 1. For special supply/return arrangement options, please contact IEC for pricing and availability.

2. Any special suply/return arrangement may affect sound and performance.

3. Risers pictured are shown for reference purposes only and adhere to the IEC standard convention.

4. MRY/MIY equipment is designed to use existing risers, so risers are typically not sold with these models.

5. Riser supply-return configurations and temperatures should be labeled prior to demolition and must be verified

prior to installation, as they may differ from the IEC standard convention.

6. Special arrangements may require special supply grilles, baffling and lab testing to validate actual performance.

Sup

Ret

Sup

Ret

90°

Ret

Sup

Triple-side Supply

Sup

Ret

Sup

Ret

Sup

90°

Sup

Supply

Sup

Ret

Sup

Ret

90°

Ret

Sup

Supply

Sup

Ret

Sup

Ret

90°

Ret

Sup

Supply

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION TWO — Product Line Specic Demolition & Installation

miniReStoramod™

Demolition, Step-by-Step Guide

Recommended Supplies: drop cloths, plastic sheet

coverings, utility knife/hole saw, shears/nibbler/

reciprocating saw, small rotary pipecutter, brazing torch,

pipe wrenches, straight edge-level, hammer, screw gun,

chisel/pry bar and a pencil.

NOTE: Jobsites will vary greatly. The general

demolition procedures listed here are

intended as a recommendation only. A

thorough evaluation of the jobsite should be

done prior to ordering the fan coil units to

determine any unique or additional steps that

may be required in order to properly demolish

an old unit and install a MIY.

WARNINGS: Page 2 (inside front cover) of this catalog

MUST be carefully reviewed before any

demolition and/or installation.

1. Adequately protect existing wall coverings

(paintings, wallpaper, etc.), furniture, carpeting,

and other surfaces when performing demolition

and installation work.

2. Remove supply-air grille and return-air/front panel

from existing unit.

3. Use a straight edge to outline drywall section for

removal, which will expose the entire front-face of

existing unit, apply painter’s tape to achieve clean

cut and prevent drywall damage.

Note: Typical area of drywall clearance for

replacement will be 81.5” x 15.5” on most

original units, although every application

may vary.

4. Carefully cut drywall at outer edges of unit, along

penciled outline, removing drywall from the oor

to the top of existing fan coil unit to expose the

entire front-face.

5. Cut and remove the upper-front, steel cabinet

panel ush with the sidewall of the existing unit.

6. Cut copper supply and return pipes with rotary

hand tool, leaving the ball valves and 1-2 inches

of copper tubing to connect to new coil.

Riser supply-return congurations and

temperature should be labeled prior to demolition,

and must be veried prior to installation, as they

may differ from the IEC standard convention.

7. Remove the upper coil support, coil, valve

package and any other components easily with a

screw gun.

8. Remove motor/blower assembly.

9. A hammer and chisel may be required to remove

blower deck.

10. Remove all other components remaining in

cabinet interior, so only a hollow, insulated, metal

shell of original unit remains.

11. Use sheet metal nibbler to trim existing cabinet

front-face anges. Leave no more than 1/4” to

1/8” ange around perimeter of cabinet-front.

Figure 2. Use nibbler or reciprocating saw to remove ange

material

NOTE – It is important to remove as much ange material as possible to minimize

any interference with the new

miniReStoramod™

replacement unit.

12. Remove insulation from bottom of cabinet

to prevent hang-up when sliding in the

replacement unit

13. Clean inside of existing unit cabinet with vacuum,

after removal of all components.

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION TWO — Product Line Specic Demolition & Installation, Cont’d.

14. Demolition complete.

NOTE: Any reproong requirements where

risers or piping penetrate oors or walls

are the responsibility of the installer.

This work should be done only after

all pressure testing is completed.

The reproong method used must

accommodate pipe expansion and

contraction and the piping must be

protected from abrasion and chemical

attack. The pipe insulation also must

be maintained to prevent sweating and

must be protected from wear or erosion

at the joint between the insulation and

the reproong material.

NOTE: Flare ttings are factory provided to

allow connection between the ball valve

and the hoses.

Installation

1. Verify that power has NOT been restored to the

installation

2. Remove the acoustical RA block-off panel that

has the wiring diagram, and set to the side.

3. Verify that the new slide-in chassis circuit breaker

(unit disconnect switch) is in the “OFF” position

4. Verify that any isolation and/or ow control valves

will t in the new chassis’ precongured riser slots

5. Remove the loose, perforated, riser insulation pad

from the unit. Unscrew and remove the corner

brace and riser access plate from the inside-rear

of the new chassis cabinet, if present. These

must be removed to slide chassis over existing

riser stub-outs. Do not discard these items, as

they will need to be used/replaced later in the

installation process.

6. Verify that the existing riser stub-outs location

matches the riser-entry cut-out section of the new

unit (appropriate height and side/orientation).

7. Thoroughly check the old unit chassis and

drywall cuts for any irregularities or protrusions

that would prevent the new unit from sliding in,

seating, and properly leveled.

8. Attach the louvered, deco panel frame onto the

new slip-in replacement chassis. Be sure to

remove the lower shipping brace (bar) from the

deco frame before it is installed.

9. Align new slip-in unit with wall cavity and slide

partially into place.

10. Route electrical conduit into slip-in through top or

side, as appropriate for your application. Continue

to make sure that this conduit does not become

pinched or otherwise compromised, while sliding

the new chassis into the old cabinet.

11. Carefully slide the new slip-in chassis, fully into

the old cabinet. The deco panel frame should

rest ush against the drywall surface around

the cutout. It may be necessary to shim the new

chassis to properly level it within the old cabinet.

12. Anchor the new chassis cabinet to existing

cabinet with sheet metal screws, from inside new

cabinet. Anchoring through the rear side of the

cabinet helps to draw the louvered, deco panel

frame and drywall together.

13. Re-install the corner brace and riser access plate,

if removal was necessary in step 5. These items

allow for pass-through of the existing riser stub-

outs, and give the unit added support.

14. Remove backing from perforated riser insulation

panel, and apply the sticky side to the inside wall

of the new chassis, sealing around the riser stub-

out penetrations. The pad prevents excessive air

leakage into the riser chase.

15. Solder hose adapters, isolation or combo valves

to the existing return and supply piping stubs. If

combo valves are used, rst verify that the correct

valve is being used for that specic unit and

supply/return stub-out.

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION TWO — Product Line Specic Demolition & Installation, Cont’d.

NOTE: Depending on valve geometry, such

valves may be installed after the

new chassis itself has been slid into

position, and prior to attachment of the

perforated, riser insulation block-off.

Heat damage to insulation should be

avoided.

16. Make mechanical service connections including,

but not limited to: hot water supply (HWS), hot

water return (HWR), cold water supply (CWS),

cold water return (CWR), rubber p-trap to drain

pan, and p-trap to riser-drain stub-out labeled

during Step 6 of demolition.

17. Repressurize riser(s), if shut off during demolition;

and verify that no leaks are present.

18. Purge water coils of air, after isolation valves are

opened to allow ow. All models come with a

manual air vent, at minimum.

19. Seal any remaining chassis openings as well

as possible, to minimize air leakage that would

adversely affect unit performance.

20. Make all high voltage electrical connections,

followed by low voltage connections.

21. Reconnect electrical service at building breaker

panel.Test unit operations and commission as

required.

Figure 3. Acoustical RA block-off Panel

12.20

30.70

.24

.60

Wiring

Diagram

22. Replace the acoustical RA block-off panel

(Figure 3) make sure that the air travels correctly

through the new unit’s coil, to achieve optimal

performance.

23. If there is a top supply, (normally front/side) make

the plenum connection through the top opening

of the new chassis (Figure 4). Be sure to cut and

remove the insulation that covers the top supply

opening.

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION TWO — Product Line Specic Demolition & Installation, Cont’d.

Figure 4. Top Opening

24. If there is a side/front supply, install the supply

air grille(s) into the painted, top supply-grille

transition panel (Figure 6). For top supply only,

install the painted top blank-off panel instead

(Figure 5).

Figure 5. Top Blank-off Panel

Figure 6. Top Supply Grille Transition Panel

25. Attach the louvered, return-air deco panel to the

new chassis, using both of the 5/16” hex cam-

locks.

26. Installation complete. Clean up work area.

Submittals and product literature detailing unit operation,

controls, and connections should be thoroughly reviewed

BEFORE beginning the connection and testing of risers

and piping.

To assure optimal unit performance, the supply

connection(s) are marked on the unit’s coil with an “S”

meaning supply or inlet and “R” meaning return or outlet

indicating ow direction to and from the coil. Blue letters

mark the chilled water connections and red letters mark

the hot water connections.

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION TWO — Product Line Specic Demolition & Installation, Cont’d.

Riser to Unit Installation

Figure 7. Riser Connection

Ball

Valve

Riser Stubout

Insulation

Threaded

Flare Fitting

Unit insulation

Outer

Cabinet

Riser Knockout

Slot

Before making the riser joints, the riser insulation must

be pulled back away from the joint and protected from

heat during the brazing process. This operation is the

responsibility of the installer. The riser joint solder material

must be selected to withstand the total operating pressure

(both static and pumping head) to which the system will

be subjected. Low temperature lead alloy solders such as

“50/50” and “60/40” are normally not suitable.

Figure 8. Connecting Unit

Flexible

Hose Kit

Riser

Ball

Valve

Riser Stubout

Insulation

Bae

Connection point to any factory

furnished and installed

components.

Coil

Figure 9.

Back-up

Wrench

Ball

Valve Wrench

Swivel

Connection

Riser to Drain Installation

Figure 10.

Drain Pan

Drain

Clamp

Riser Knockout

Unit Insulation

P-Trap

Unit Wall

Riser

Riser Stubout

1. After the applicable Supply, Return, and Drain

pipe knockouts have been removed, carefully

position the unit so that the riser ball valves

penetrate into the unit through the riser knockouts

making sure the insulation penetrates into the unit

as shown in Figure 8, Figure 9, and Figure 10.

2. Before anchoring the equipment in place, the unit

must be leveled and the cabinet must be plumb

and squared.

The unit may be anchored in place by bolting

directly through the unit oor or attaching the

new chassis to the existing cabinet in some

location that will not interfere with drywall or

other items such as the supply grille, thermostat,

or return access panel. When attaching the

replacement chassis to the old cabinet, care must

be taken to not penetrate the cabinet in locations

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION THREE — Finishing Installation

that may damage internal components or wiring.

The mounting technique is a matter of choice;

however, the unit should always be anchored

securely to prevent movement during construction

and riser expansion, contraction, and accidental

contact.

After anchoring the new unit, it is then ready for

the various service connections to be made such

as riser and electrical connections.

All miniReStoramod™units use reinforced braided

stainless steel exible hose kits for piping between

existing risers and unit water coils as shown

in Figure 8. The hose kit design has threaded

connections on each end. The hose kits allow for

riser uctuations due to thermal expansion.

5. Use a wrench to tighten the swivel connections.

Use a backup wrench to hold the riser ball valve

stationary to prevent it from bending or twisting

during installation as shown in Figure 9. Be careful

to not over tighten swivel connections.

6. Locate the unit’s coil unions, bracketed at the top

of the coil assembly.

7. The plastic are caps on the end of the coil tting

should be removed and discarded.

8. Use a wrench to tighten the swivel connections.

Be careful to not over tighten swivel connections.

9. Locate the rubber p-trap drain hose, factory

installed to the drain pan connection in the bottom

of the unit as shown in Figure 10.

10. Push the rubber drain hose over the riser drain

stub-out. Be careful that you do not bend the

drain stub-out.

11.

Adjust the hose clamp over the riser stub-out and

rubber hose to hold in place as shown in Figure 10.

12. Test for leaks. Any and all leaks should be repaired

before proceeding with installation. When testing

with air or some other gas, it might be necessary

to tighten stem packing nuts on some valves to

maintain air pressure in the riser. Pressure testing

risers with water should be done with the unit

service valves closed to prevent ushing debris

into the unit valve packages. All leaks should

be repaired before proceeding with the unit

installation.

13. After system integrity has been established, the

riser insulation must be pulled back into place over

the joint and glued or sealed to prevent sweating

and heat loss or gain. All of the risers including the

riser stub-outs should be properly covered with

insulation. Internally mounted chilled water piping

and valves are located over the drain pan and

need not be insulated.

It is the responsibility of the installer to make sure that an

isolation valve is installed between each supply and return

piping connection to the unit.

SECTION THREE – Finishing Installation

Grille/Ductwork Installation

All ductwork and/or supply and return grilles should be

installed in accordance with the installation instructions

and project specications. If not included on the unit or

furnished from the factory, supply and return grilles should

be provided as recommended in the product catalog.

NOTE: Refer to CAUTION and WARNING on page 2

(inside front cover) of this catalog.

The safest method of freeze protection is to use glycol in

the proper percent solution for the coldest expected air

temperature.

Electrical Connections

The unit serial plate lists the unit electrical characteristics

such as the required supply voltage, fan and heater

amperage and required circuit ampacities. The unit wiring

diagram shows all unit and eld wiring. Since each project

is different and each unit on a project may be different,

the installer must be familiar with the wiring diagram and

serial plate on the unit BEFORE beginning any wiring.

The unit electrical power supply and entry location

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION FOUR — Start-Up

was selected during order entry. By default, the unit is

designed to allow for electrical supply wiring to be pulled

directly through the side of the cabinet into the circuit

breaker box.

All components furnished for eld installation by either the

factory or the controls contractor should be located and

checked for proper function and compatibility. All internal

components should be checked for shipping damage, and

any loose connections should be tightened to minimize

problems during start-up.

Any devices such as fan switches or thermostats that

have been furnished from the factory for eld installation

must be wired in strict accordance with the wiring

diagram that appears on the unit. Failure to do so could

result in personal injury or damage to components, and

will void all manufacturer’s warranties.

The fan motor should never be controlled by any wiring or

device other than a properly selected thermostat, without

factory authorization. Fan motor(s) may be temporarily

wired for use during construction only with prior factory

approval in strict accordance with the instructions issued

at that time.

Exposed Unit Touch-up and Repainting

Quick nish wall panel kits may be furnished with a

thermally-bonded powder-coated nish. Small scratches

in this nish may be repaired with touch-up paint available

from the factory. Some colors of touch-up paint are

available in aerosol containers and all standard touch-up

paint is available in pint, quart, and gallon cans. Contact

the factory for availability.

When repainting a surface, the nish should be prepared

by light sanding with #280 grit sand paper or #000 or

#0000 ne steel wool. The surface may also be wiped

with a liquid surface etch cleaning product. These items

should be available at most paint product stores. It should

be noted that the more conscientiously this preparation is

done, the more effective it will be.

After this preparation is accomplished, the factory nish

should provide excellent adhesion for a variety of air-dried

top coats. Enamel will give a more durable, higher gloss

nish, while latex will not adhere as well and will give a

dull, softer nish.

Factory aerosol touch-up paint may require a number

of light “dust coats” to isolate the factory-baked enamel

nish from the quick drying touch-up paint.

SECTION FOUR – Start-Up

Operating Conditions

Coil:

Maximum Operating Pressure – 250 psi

Maximum inlet water temperature – 180°F (heating)

Fan:

Operates at minimum of 90% rated voltage

Consult rating software for maximum external static

Max ESP for MIY with electric heat – 0.20” wg on High/

Medium speeds and 0.12” wg on Low speed.

Before beginning any start-up operation, the start-up

personnel should familiarize themselves with the unit,

options and accessories, and control sequence to under-

stand the proper system operation. All personnel should

have a good working knowledge of general start-up

procedures and have the appropriate start-up and

balancing guides available for consultation.

The initial step in any start-up operation should be a nal

visual inspection. All equipment, plenums, duct-work, and

piping should be inspected to verify that all systems are

complete and properly installed and mounted, and that no

debris or foreign articles such as paper or drink cans are

left in the units or other areas.

Each unit should be checked for loose wires, free blower

wheel operation, and loose or missing access panels or

doors. Except as required during start-up and balancing

operations, no fan coil units should be operated without

all the proper ductwork attached, supply and return grilles

in place, and all access doors and panels in place and

secure. A clean lter of the proper size and type must also

be installed. Failure to do so could result in damage to

the equipment or building and furnishings and/or void all

manufacturer’s warranties.

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION FOUR — Start-Up, Cont’d.

Cooling/Heating System

Prior to the water system start-up and balancing, the

chilled/hot water systems should be ushed to clean out

dirt and debris which may have collected in the piping.

During this procedure, the system should be ushed from

the supply riser to the return riser through a cross-over

loop at the end of the riser column, and all unit service

valves must be in the closed position. This prevents

foreign matter from entering the unit and clogging the

valves and metering devices. Strainers should be installed

in the piping mains to prevent this material from entering

the units during normal operation.

During system lling, air venting from the unit is

accomplished by the use of the standard, manual air

vent tting, or the optional, automatic air vent tting

installed on the coil. Venting can be accomplished by

depressing the needle valve core. Automatic air vents may

be unscrewed one turn counterclockwise to speed initial

venting, but should be screwed in for automatic venting

after start-up operations.

Air System Balancing

All duct stubs, grilles, lters, and return-access panels

must be properly installed to establish actual system

operating conditions BEFORE beginning air balancing

operations.

Each individual unit and the attached ductwork is a

unique system with its own operating characteristics. For

this reason, air balancing is normally done by balance

specialists who are familiar with all procedures required

to properly establish air distribution and fan-system

operating conditions. These procedures should not be

attempted by unqualied personnel.

Units with no ductwork have air volumes predetermined

at the factory by supply grille size and normally do not

require air balancing other than selecting the desired fan

speed. Units furnished with optional dampers on supply

grilles may require some small adjustments to “ne tune”

the air delivery to each grille.

After proper system operation is established, the actual

unit air delivery and the actual fan motor amperage draw

for each unit should be recorded in a convenient place for

future reference.

ECM Blower

The standard motor/blower assembly offered is an

Electronically Commutated Motor and the brushless DC

blower is controlled by a 3-speed potentiometer control

board, or direct proportional (-10 VDC/4-20 mA) control

from a compatible thermostat.

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION FOUR — Start-Up, Cont’d.

Motor Control Voltage – 3-Speed Relay Board – Factory Settings

NOTES: 1. The above default settings are pre-programmed by the Factory for each cited application to ensure proper operation and

adherence to published values.

2. Each fan speed setting must NOT be reduced further than your application’s cited :Low” value; otherwise the electric heater

will not maintain sufficient airflow. This can result in frequent nuisance tripping of the thermal cut-out protection, which

temporarily disables the electric heater.

3. Increasing voltage settings beyond the cited application values will typically result in higher sound power values than what are

published by the manufacturer.

4. Pleasae contact the Factory for special CFM or external static pressure applications.

Unit

Model

# of

Coil

Rows

Unit Voltage

Pot Board Settings – VDC

Values @ 0” ESP CFM Values @ 0” ESP

High Medium Low High Medium Low

MIY04 3 120V/1/60 6.37 5.29 3.65 386 303 203

MIY04 4 120V/1/60 6.28 5.21 3.63 380 301 202

MIY04 5 120V/1/60 6.28 5.21 3.63 374 297 199

MIY04 3 208V/1/60 7.23 5.85 4.14 384 302 201

MIY04 4 208V/1/60 7.12 5.82 4.20 375 297 200

MIY04 5 208V/1/60 7.41 6.00 4.20 378 300 198

MIY04 3 240V/1/60 6.85 5.59 4.14 387 303 210

MIY04 4 240V/1/60 6.89 5.67 4.13 379 302 203

MIY04 5 240V/1/60 7.04 5.80 4.25 384 307 208

MIY04 3 277V/1/60 7.15 5.82 4.14 389 309 203

MIY04 4 277V/1/60 7.04 5.78 4.22 377 300 207

MIY04 5 277V/1/60 7.05 5.85 4.25 380 303 205

Figure 11. 3-Speed Relay Board

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION FOUR — Start-Up, Cont’d.

Motor Control Voltage – Proportional/Analog Thermostat Settings

NOTES: 1. The above minimum and maximum settings must be field-programmed into the proportional fan thermostat to ensure

proper operation and adherence to published values.

2. The minimum voltage settings must NOT be reduced further; otherwise, the electric heater will not maintain sufficient

airflow. This can result in frequent nuisance tripping of the thermal cut-out protection, which temporarily disables the

electric heater.

3. Increasing voltage settings of High fan speed may result in higher sound power values than what are published by the

manufacturer.

4. Please contact the Factory for special CFM or external static pressure applications.

Unit Model

and Size

Total # of Coil

Rows

Unit Voltage

(V/PH/Hz)

Proportional/Analog T’stat

Fan Speed Limits (VDC) Tested CFM values at 0” ESP

Max Min High Low

MIY04 3 120V/1/60 6.37 3.65 386 203

MIY04 4 120V/1/60 6.28 3.63 380 202

MIY04 5 120V/1/60 6.28 3.63 374 199

MIY04 3 208V/1/60 7.23 4.14 384 201

MIY04 4 208V/1/60 7.12 4.20 375 200

MIY04 5 208V/1/60 7.41 4.20 378 198

MIY04 3 240V/1/60 6.85 4.14 387 210

MIY04 4 240V/1/60 6.89 4.13 379 203

MIY04 5 240V/1/60 7.04 4.25 384 208

MIY04 3 277V/1/60 7.15 4.14 389 203

MIY04 4 277V/1/60 7.04 4.22 377 207

MIY04 5 277V/1/60 7.05 4.25 380 205

Figure 12. Proportional Fan Thermostat

Neptronic thermostat offered

by manufacturer

(Field Programmed)

Modular Hi-Rise Replacement Series – MIY

INSTALLATION, OPERATION, & MAINTENANCE MANUAL

SECTION FOUR — Start-Up, Cont’d.

Water Treatment

Proper water treatment is a specialized industry

IEC recommends consulting an expert in this eld

to analyze the water for compliance with the water

quality parameters listed below, and to specify the

appropriate water treatment regimen. The expert may

recommend typical additives such as rust inhibitors,

scaling preventative, antimicrobial growth agents, or algae

preventatives. Anti-freeze solutions may also be used to

lower the freezing point.

IEC water coil tubes and headers are constructed of

copper. Multiple brass alloys may be present in the valve

package, depending on unit conguration. It is the user’s

responsibility to ensure the tube and piping materials

furnished by IEC, are compatible with the treated water.

Water Containing Required Concentration

Sulphate Less than 200 ppm

pH 7.0 – 8.5

Chlorides Less than 200 ppm

Nitrate Less than 100 ppm

Iron Less than 4.5 mg/l

Ammonia Less than 2.0 mg/l

Manganese Less than 0.1 mg/l

Dissolved Solids Less than 1000 mg/l

CaCO3Hardness 300 - 500 ppm

CaCO3Alkalinity 300 - 500 ppm

Particulate Quantity Less than 10 ppm

Particulate Size 800 micron max

Water System Balancing

A complete knowledge of the hydronic system, along with

its components and controls, is essential to proper water

system balancing. This procedure should not be attempted

by unqualied personnel. The system must be complete,

and all components must be in operating condition

BEFORE beginning water system balancing operations.

Each hydronic system has different operating

characteristics depending on the devices and controls

used in the system. The actual balancing technique may

vary from one system to another.

After the proper system operation is established, the

appropriate system operating conditions such as various

water temperatures and ow rates should be recorded in

a convenient place for future reference.

Before and during water system balancing, conditions may

exist due to incorrect system pressures which may result

in noticeable water noise or undesired valve operation.

After the entire system is balanced, these conditions will

not exist on properly designed systems.

Controls Operation

Before proper control operation can be veried, all other

systems must be operating properly. The correct water

and air temperatures must be present for the control

function being tested. Some controls and features are

designed to not operate under certain conditions. For

example, on a two-pipe cooling/heating system with

auxiliary electric heat, the electric heater cannot be

energized with hot water in the system.

A wide range of controls, electrical options and

accessories may be used with the equipment covered in

this manual. Consult the approved unit submittals, order

acknowledgements, and other literature for detailed

information regarding each individual unit and its controls.

Since controls and features may vary from one unit to

another, care should be taken to identify the controls

used on each unit and their proper control sequence.

Information provided by component manufacturers

regarding installation, operation, and maintenance of their

individual controls is available upon request.

When changing from one mode to another (cooling to

heating or heating to cooling), it may take some time to

actually notice a change in the leaving air temperature.

In addition, some units may be designed for a very low

air temperature rise in heating. Before declaring a unit

inoperative or a component defective, it may be necessary

to verify operation by more than one method.

This manual suits for next models

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