ENR & ENH Type 45 Replacement Chassis Installation & Maintenance Data ➤

Installation & Maintenance Data
IM 435-3
Group: PTAC
Part No.: 106018611
Date: May 1999
ENR & ENH Type 45
Replacement Chassis
EXISTING
LOUVER
➤
CONDENSER COIL
BAFFLE SEAL
CHASSIS SIDE SEAL
(LEFT-HAND)
➤
EXISTING
WALL SLEEVE
➤
➤
➤
➤
➤
WALL SLEEVE
CHASSIS
SUPPORT
CHANNEL
CHASSIS
TOP SEAL
➤
WALL SLEEVE
BOTTOM SEAL
➤
CHASSIS
CHASSIS SIDE SEAL
(RIGHT-HAND)
©1999 AAF–McQuay Incorporated
IM 435-3 / Page 1 (Rev. 5/99)
Table of Contents
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Wall Sleeve Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chassis Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installing The Condenser Coil Baffle Seal . . . . . . . . . . . . . . . . . . 3
Additional Alteration With Heat Pump . . . . . . . . . . . . . . . . . . . . 4
Chassis Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Equipment Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Recommended Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,7
Approximate Ship Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
ENR (Electric Heat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ENH (Heat Pump) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ENH (Heat Pump with Supplemental Hydronic Heat) . . . . . 10
ENR/ENH (Hydronic Heat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Catalog Number Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Installation
The installation of this equipment shall be in accordance with the regulations of authorities having jurisdiction and all
applicable codes. It is the responsibility of the installer to determine and follow the applicable codes. Sheet metal parts, selftapping screws, clips and such items inherently have sharp edges, and it is necessary that the installer exercise caution.
This equipment is to be installed only by an experienced installation company which employs trained personnel.
Inspection
When the equipment is delivered all items should be checked
carefully against the bill of lading to be sure all crates and cartons have been received. All units should be carefully inspected
when received. If any damage is noticed, the carrier should make
proper notification on the delivery receipt acknowledging the damage. The carrier should also complete a carrier inspection report
and forward it to AAF–McQuay Incorporated.
The unit nameplate should be checked to be sure the voltage
agrees with the power supply available.
The ENR/ENH-45 is a replacement chassis for Singer and American Standard Type 45 units. It is designed to be installed into the
existing Type 45 wall sleeve using the retrofit kit provided with the
new chassis. Installation of this retrofit kit is described herein.
Do not install the chassis until the retrofit kit has been properly
installed on the chassis and in the wall sleeve.
The ENR/ENH-45 retrofit kit is packaged in a separate carton
and shipped in addition to the chassis. Careful inspection should
be made of the retrofit kit package to insure all components have
been included. The retrofit kit should include the following pieces:
No. of
Pieces
Parts
1. Wall sleeve bottom seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. Wall sleeve chassis support channel . . . . . . . . . . . . . . . . . . . 2
3. Chassis side seal (RH & LH 1 each) . . . . . . . . . . . . . . . . . . . 2
4. Chassis top seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5. Condenser coil baffle seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
6. Sheet metal screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
7. Tinnerman clips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
If any of these pieces are missing from the retrofit kit package
notify AAF–McQuay Incorporated, Service Parts Dept., 13600
Industrial Park Blvd., Plymouth, MN 55440.
Figure 1. Exploded View of Retrofit Kit
WALL SLEEVE CHASSIS
SUPPORT CHANNELS
WALL SLEEVE
BOTTOM SEAL
CONDENSER COIL
BAFFLE SEAL
CONDENSER COIL
BAFFLE SEAL
CHASSIS SIDE SEAL
(LEFT-HAND)
CHASSIS SIDE SEAL
(RIGHT-HAND)
CHASSIS TOP SEAL
CHASSIS TOP SEAL
REQUIRED FASTENERS
IM 435-3 / Page 2 (Rev 5/99)
CHASSIS TOP SEAL
Wall Sleeve Preparation
CAUTION: Disconnect all power to the unit before continuing.
1. Remove existing chassis from wall sleeve and discard.
2. Clean existing wall sleeve to remove any residual dirt and
debris. If any rust exists, remove it with a wire brush or steel
wool then coat the spot(s) with rust inhibiting paint.
3. Inspect the condition of the wall sleeve and repair as required.
Be sure all wall sleeve gaskets are intact and repair as needed.
4. Locate the retrofit kit package and take out the wall sleeve
bottom seal and two chassis support channels.
5. Place the square edge of the chassis support channels into
the weephole slots of the existing wall sleeve. The slotted ends
of the chassis supports will extend toward the roomside of
the wall sleeve.
6. Place a heavy bead of RTV silicone sealant (or equivalent) to
the leading edge of the wall sleeve bottom seal. The leading
edge, is that edge that will be closest to the outdoor side of
the wall sleeve.
7. Place the wall sleeve bottom seal into the wall sleeve so that
the leading edge engages the slots of the chassis support
channels. Position the leading edge of the bottom seal approximately 107/8 inches from the rear of the wall sleeve. Be
sure the black rubber gasket of the wall sleeve bottom
seal is facing upward. Press down firmly on the chassis
bottom seal to insure a positive seal.
8. Drill a 1/8" diameter hole in each end of the wall sleeve using
the holes of the wall sleeve bottom seal as a template.
CAUTION: Drilling holes elsewhere in the wall sleeve will
destroy the weather integrity and could interfere with
chassis installation.
9. Fasten the wall sleeve bottom seal to the wall sleeve using
the (2) #8 x 3/8 sheet metal screws supplied.
10. Caulk the ends of the wall sleeve bottom seal with RTV
silicone sealant (or equivalent) to insure weather integrety.
The bottom seal must be completely water tight to prevent
condensate from entering the indoor space.
Figure 2. Installation of Wall Sleeve Bottom Seal
CHASSIS
SUPPORT
CHANNELS
EXISTING
WALL
SLEEVE
RAISED
RUBBER
GASKET
WALL
SLEEVE
BOTTOM
SEAL
MOUNTING
SCREW
SEAL ALONG
THIS EDGE
Chassis Preparation
1. Remove the chassis from the carton and place it on the floor
near the wall sleeve.
2. Remove the remaining retrofit kit parts from the package and
place them near their final installation position, as shown on
the front cover.
3. Locate the two side seals and mount them on the sides of the
chassis so that the gasket faces the outdoor side. This
requires that the existing screws be removed and reinstalled
through the side seals. Note also that the gasket of these side
seals extends beyond one end of each seal. This gasket
extension must be positioned towards the top.
4. Locate the three chassis top seal pieces and assemble them
for installation using the screws provided. If the unit has electric
heat, all (3) parts will be used. If the unit has hydronic heat,
only the front and right side pieces will be used.
5. Align the top seal with the perimeter of the chassis discharge
plenum and drill 1/8" diameter holes in the discharge plenum
flange using the top seal as a template.
6. Fasten the top seal to the discharge plenum flange. NOTE:
Pop rivets must be used to secure the sides of this top
seal to the plenum flange to prevent interference with the
existing seals of the wall sleeve. Screws may be used to
attach the front portion of the top seal as no interference will
occur. NOTE: For hydronic units, the left-hand piece of the
top seal is discarded.
Installing the Condenser Coil Baffle Seal
1. Assemble the three pieces so as to form a "U" shape as shown
in Figure 1. Fasten these pieces together using the screws
provided.
2. Position the assembled seal against the condenser coil so
that the tangs of the assembly engage between the coil and
the chassis drain pan. The gasket of the condenser coil baffle
seal should rest tightly against the end plates of the condenser
coil. The installed condenser coil baffle seal is shown in
Figure 3.
3. Using the two Tinnerman clips supplied, attach the condenser
coil baffle seal to the condenser coil end plates 3" to 4" from
the top of the coil.
Figure 3. Condenser Coil Baffle Seal
CHASSIS
TOP SEAL
RIGHT-HAND
SIDE SEAL
TINNERMAN
CLIP
CONDENSER
COIL
CONDENSER
COIL BAFFLE
SEAL
TANG
Additional Alteration with Heat Pump Models
Heat pumps generate condensate during the heating season that
must be disposed of using a drain kit. The drain kit is furnished
from the factory with all heat pump chassis, for field installation.
The following modifications must be made to the retrofit kit and
existing wall sleeve when using heat pumps.
1. Using a hacksaw, Sawsall, or tin snips, cut a 5/8" x 5/8" slot in
the left-hand side seal of the retrofit kit. This slot should be
located 1/2" from the bottom of the wall sleeve. Align this slot
with the flange of the wall sleeve and cut an identical second
slot in flange of the wall sleeve.
IM 435-3 / Page 3 (Rev. 5/99)
2. Insert the copper tube into the wall sleeve. Be certain that the
drain tube extends well into the wall sleeve and maintains a
downward pitch to assure proper drainage.
3. The drain kit is designed to allow condensate to run into the
wall sleeve where it can be carried away through a condensate
drain system. To drain the condensate directly to the outside,
extend the drain tube using a second 5/8" flexible polymer
connection and a piece of copper tube cut to the proper length.
4. Caulk around the tube that protrudes through the wall sleeve
side seal.
5. When the chassis is slid into place, be sure the drain tubes
engage properly, as shown in Figure 4.
Figure 4. Optional Condensate Drain Kit
5
/8" DRAIN TUBE
WALL SLEEVE
CHASSIS
5
/8" FLEXIBLE
POLYMER
CONNECTION
Chassis Installation
Before installing the chassis, make the following visual and
mechanical inspection:
1. Rotate the condenser fan and evaporator fans to be sure they
spin freely. If they do not, make the necessary adjustments or
remove any obstruction.
2. Check the evaporator coil fins and the condenser coil fins
for damage. If any damage is minor, straighten fins with
the proper fin comb. If the damage is extensive, notify the
carrier immediately.
3. Check all fasteners and tighten as required.
4. Do not remove or loosen hold-down bolts on compressor
as they are properly adjusted at the factory.
5. Remove the cardboard base from the chassis and discard.
6. When installing the size 15 chassis, be sure to remove the
shipping angles. Instructions for removal of these angles can
be found attached to the top of the chassis.
Once the chassis inspection has been completed, proceed as
follows:
1. Align the chassis with the existing wall sleeve making sure
nothing is obstructing the opening to the wall sleeve.
2. Slide the chassis into the sleeve until it seats against the side
seals of the wall sleeve. CAUTION: Do not push on the coil
surface, control box or scroll housings when inserting the
chassis into place.
3. For units with 115V, 208V and 230V power cords, insert the
cord set through the opening in the base of the wall sleeve at
the right hand side.
4. Set the manual damper to the "open" or "closed" position as
desired. For units equipped witn the automatic damper, place
the switch to the "auto" or "closed" position as desired. In the
"auto" position, the damper is open whenever the indoor fan
motor is running. The "auto/closed" switch is located at the
bottom left-hand corner of the chassis.
5. For hydronic units, plug in the valve wires. A cord and plug is
supplied to match its existing receptacle.
6. For heat pump chassis, connect the drain tube of the chassis
with the drain pipe installed in the wall sleeve as shown in
Figure 4.
7. Install the evaporator drain pan cover on the indoor side of
the drain pan. This is done by setting the cover in place and
firmly pressing in and down on the cover until it drops into
place covering the exposed portion of the indoor drain pan.
8. For units equipped with 115V, 208V or 230V power cords,
insert the plug into the receptacle. Excess cord should be
coiled neatly beneath the unit or in the subbase.
9. For 265V units, make electrical connections to the pigtails
located inside the control box. A 7/8" diameter knockout for
conduit connection is provided at the bottom of the control box.
10. Insert the existing filter or replace with a new filter.
11. Replace the front panel making sure the tangs at the bottom
of the front panel engage properly in the wall sleeve. Swing
the front panel upward and lift slightly to engage the front
panel tangs with the slots in the existing wall sleeve.
Equipment Startup
®
Initial startup of the lncremental conditioners by experienced
personnel is usually the responsibility of the installing contractor.
This startup consists of inspecting and operating the equipment
for all functions at the time of initial installation, and making
necessary adjustments. It also includes demonstrating its proper
operation to the owner or his agent. Note that unless otherwise
specifically agreed to in writing, McQuay includes no field labor,
startup service or the like in the price of its equipment. After
the equipment leaves the factory, it may become damaged or
maladjusted during transportation or on the job. Sometimes wires
are disconnected accidentally, or fan motors move on their bases
due to rough handling, causing fans to strike. The correction of
such conditions is part of the startup.
Before starting equipment, make certain that:
1. Correct voltage has been supplied to the equipment.
2. The electric plug from the control box has been inserted into
the receptacle. (If applicable).
IM 435-3 / Page 4 (Rev 5/99)
During startup (applies only to standard equipment):
1. Set manual ventilation damper to OPEN or CLOSED position
as required by owner. Set "auto-off" switch as required if unit
is equipped with electric fresh air damper.
2. Push HIGH button to preselect fan speed; push HEAT button.
Move thermostat to the extreme heating position (counterclockwise). Push LOW button; fan should change to low speed.
If it's a heat pump, the compressor and outdoor fan should
start. If it has hydronic heat, the valve should open.
3. Push HIGH button to preselect fan speed; push COOL button. Move thermostat to the extreme cooling position (clockwise). Compressor and outdoor fan should cycle on and off
as the thermostat requires. Push LOW button; fan should
change to lower speed. Outdoor fan should be on whenever
compressor operates.
4. Push OFF button. Fan should stop, and neither heater nor
compressor should continue to operate.
Electrical Service
All wiring should be done in accordance with all local and
National Electrical Code requirements. The conditioners are
supplied as follows:
Type 45 Replacement Electrical Heating Unit:
1. 208V or 230V models are supplied with an attachment cord
and plug which exit from beneath the conditioner on the
control side. The cord has a usable length of 60" from where
it exits the conditioner. The use of an extension cord is not
recommended. Refer to the chassis nameplate to determine
circuit ampacity and overcurrent protection. Time delay fuses
are recommended to avoid nuisance tripping. The receptacle
is generally mounted beneath the conditioner, on or recessed
in the wall so that it is concealed by the conditioner overhang.
The space under the conditioner must be at least 3" high.
2. On 265V models, the chassis is supplied with no cord. A knockout is furnished in the control box to allow for field supplied
permanent connection. Electrical connections are made to
pigtails inside the control box.
3. Hydronic models include valve wiring and a plug to match the
existing valve.
Scheduled Maintenance
Incremental conditioners are built to last. With proper care, the
unit should provide uninterrupted service for many years. Scheduled maintenance of this equipment, as described below, is the
key to the equipment's longevity.
Air Filters– Air filters must be cleaned at regular intervals. Twice
annually may be adequate in some areas while twice monthly
may be required in others. Areas with high dirt and lint content or
heavy usage of units require more frequent filter maintenance
than those areas of relatively clean operating or low usage
conditions. Unit malfunction may occur if air filters are not kept
clean. Rinse filters with hot water and a mild detergent. Let dry
and oil lightly to enhance dust collecting ability.
Chassis– It is recommended that every year the chassis be
removed for a thorough checkup. This should be completed as
follows:
6. Thoroughly clean discharge grilles.
7. Cover motors and control module with watertight material and
wash evaporator coil, condenser coil and base pan using hot
water and a mild soap. Do not use a harsh detergent for it
may corrode the aluminum fins.
8. Clean condensate drain and clear weep holes.
9. Dry equipment thoroughly, especially electric parts and
insulation.
10. Clean any rust spots with steel wool and paint with rust
inhibiting paint.
11. Clean insulation or replace if necessary.
12. Check all fasteners and tighten as required.
1. Unplug unit from power source.
13. Clean and inspect damper door and linkage.
2. Remove front panel.
3. Remove chassis from cabinet and move it to the
maintenance department. Replace with spare chassis or
weather plate.
4. Check all seals and insulation and repair as required.
14. After the first year, oil fan motors. For 8 hour/day operation,
add 8 to 10 drops to each bearing. For 24 hour/day operation,
add 16 to 20 drops to each bearing. Use a commercial grade
electric motor oil or SAE #10 non-detergent motor oil.
15. Test run chassis before re-installing or returning to spare parts
stock.
5. Check all wiring and controls for hazardous conditions.
Recommended Spare Parts
An inherent advantage of the Incremental system is that failure
of any one part affects only one Incremental conditioner and does
not interrupt the operation of the rest of the system. A further
advantage is that a failed part can be quickly and easily replaced,
thus minimizing the inoperative time of the equipment. This is so,
however, only if a replacement part is quickly available. In order
to replace a failed part quickly and keep all Incremental conditioners in good operating condition, AAF-McQuay Incorporated
recommends that at the time Incremental conditioners are purchased, owners arrange for a small stock of replacement parts.
Where an owner carries such a stock, immediate replacement of a defective part is possible. The defective part can then
be returned to the factory or one of its authorized service stations. So long as it is still in warranty, it is repaired or replaced
and returned to the owner without cost for shop labor and material. Thus, the stock of replacement parts is constantly replenished. To the right is listed the kind of parts which are recommended to be carried in stock, together with the quantity of parts
recommended per 100 Incremental conditioners installed.
Part Name
Qty. Per
100 Units
Cooling Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Compressor Overload Device . . . . . . . . . . . . . . . . . . . . . . . . 1
Compressor Running Capacitor . . . . . . . . . . . . . . . . . . . . . . 1
Conditioned Air Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Condenser Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Pushbutton Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Damper Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Knob for Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Control Relay (if used) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Damper Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Electric Resistance Heater (each size) . . . . . . . . . . . . . . . . 1
Touch-up Paint (1 pt. spray can) . . . . . . . . . . . . . . . . . . . . . . 1
Oil for Fan Motors (gallons) . . . . . . . . . . . . . . . . . . . . . . . . . . 1
For the current spare parts list, and applicable prices, see your
representative or write McQuay Service, P.O. Box 1551, Minneapolis, MN 55440.
IM 435-3 / Page 5 (Rev. 5/99)
Troubleshooting Chart
These items should be checked by a qualified service technician only.
TROUBLE
1. Blowers won't operate
on Cool.
CAUSE
CURE
b. Faulty pushbutton switch.
c. Loose connections at pushbutton switch.
a. Check supply line fuses, circuit breakers, and be sure
the power is on. Blown fuses would indicate circuit overloading, a short circuit, or a grounded condition in the circuit.
Voltage supply to the equipment should be checked. Refer
to the chassis nameplate for the minimum voltage.
b. Replace.
c. Tighten.
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
Thermostat set too high.
Heat valve is open and heat is on.
Low voltage.
Faulty pushbutton switch.
Faulty connection at pushbutton switch.
Defective wiring to thermostat.
Loose connections at compressor terminals.
Wiring to compressor terminals defective.
Loose connections in compressor overload device.
Starting capacitor malfunctions (open circuited, short
circuited or loss of capacity).
k. Defective compressor motor (short circuited, open circuited,
grounded).
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
3. Blowers run on COOL
and compressor starts,
but stops after a short
interval.
a. Operation of overload device due to overloaded
compressor motor.
a. Check voltage supply. Clean condenser inside and out.
Check at outside face of condenser for recirculation of
condenser air. Put air “splitters” in, if missing. Check
to make sure condenser blower/fan is operating properly.
Check compressor for short circuit. If defective, *ship cooling chassis to nearest McQuay authorized warranty station.
4. Blowers run on COOL
and compressor starts
and runs, but compressor occasionally stops
(on overload device).
a. Low voltage due to overloaded circuits within building or
throughout the local power system. Due to varying power
demands, this condition might exist only at certain times
during the day or on very hot days.
b. High voltage due to fluctuations in local power system;
usually occurs at low load periods of the day.
c. Partial short circuit in compressor motor. Under normal
loading, a compressor with a partial short circuit might
appear to be operating all right; increased condensing air
temperature might then cause a short.
a. Run separate electric line to equipment. Consult local
power company.
a.
b.
c.
d.
a.
b.
c.
d.
2. Blowers operate on
COOL, but compressor
does not start.
5. Compressor starts and
runs on COOL, but
blowers do not run.
a. No power.
Faulty pushbutton switch.
Open circuited blower motor.
Blower rubbing against its housing.
Bearings on blower motor seized.
e. Loose connection at pushbutton switch.
Adjust. Rotate control knob to “Cooler.”
Close heat valve.
Check as above.
Replace.
Tighten.
Replace.
Tighten.
Replace.
Tighten
Replace.
k. *Ship cooling chassis prepaid to nearest McQuay authorized warranty station.
b. Consult local power company.
c. If confirmed, *ship cooling chassis prepaid to nearest
McQuay authorized warranty station.
Replace.
Replace.
Adjust blower motor or blower wheel position.
Lubricate motor with SAE #10 oil. (It may be necessary to
remove blower assembly to do this.)
e. Tighten.
6. Compressor starts and
runs on COOL, but fan
motor starts, then
stops.
a. Operation of the internally connected overload device due
to a short circuit in blower motor.
b. Windings, rubbing of blower motor or lack of lubrication in
blower motor bearings.
a. Adjust blower/fan wheel on shaft or blower motor mounting.
Lubricate with SAE #10 oil (see above).
b. Adjust blower wheel or motor or replace wheel.
7. Equipment
gives
electrical shock.
a. Grounded electrical circuit within chassis and/or faulty
chassis ground.
a. Eliminate ground in chassis and/or check chassis ground.
8. Insufficient cooling
capacity.
a. Insufficient airflow through condenser due to:
1) Dirty condenser.
2) Obstructed louvers on outer cabinet or wall box.
3) Condenser blower/fan not running.
a.
4) Condenser blower/fan not up to speed.
5) Condenser blower/fan slipping on motor shaft.
6) Recirculation of condenser air.
b. Insufficient airflow through evaporator due to:
1) Dirty evaporator.
2) Ice on evaporator coils.
3) Dirty air filter.
4) Obstructed discharge grilles.
5) Evaporator blower motor not running.
6) Evaporator blower motor not up to speed.
7) Evaporator blower slipping on motor shaft.
c. Heat load in room exceeds capacity of equipment.
d. Windows and doors in room are open.
e. Compressor not pumping, indicated by:
1) Low wattage.
2) Condenser not warm, evaporator only partially cool, or
not at all.
*If equipment is in warranty.
IM 435-3 / Page 6 (Rev 5/99)
1) Clean.
2) Remove obstructions.
3) Check same as in the case of malfunctioning conditioner air blower.
4) Check for correct voltage. Oil blower motor if necessary.
5) Adjust blower position and tighten setscrew.
6) Correct as in #3.
b.
1)
2)
3)
4)
Clean.
Turn equipment off to let ice melt.
Clean or replace.
Remove obstructions. In case of top discharge equipment, make sure books, magazines, etc., are kept off
the equipment.
5) Checkt as in #1.
6) Check for correct voltage. Oil motor is necessary.
7) Adjust blower wheel position and tighten setscrew.
c. Refer to original load calculations; recalculate heat load.
d. Close them.
e. *Ship prepaid to nearest McQuay authorized warranty
station.
Troubleshooting Chart (cont'd)
These items should be checked by a qualified service technician only.
TROUBLE
CAUSE
8. Insufficient cooling
capacity (continued).
f. Restricted capillary tube or strainer, indicated by:
1) Frost on capillary or strainer.
2) Low wattage.
3) Condenser not warm.
4) Evaporator partially frosted, only partially cool, or not
at all.
f. *Ship prepaid to nearest McQuay warranty station.
CURE
9. Too much cooling.
a. Thermostat set too low.
b. Defective thermostat.
a. Adjust.
b. Replace.
10. “Sweating”
a.
b.
c.
d.
Condensate drain from evaporator to condenser plugged.
Insulating seals on equipment damaged.
Evaporator blower motor not up to speed.
Evaporator blower incorrectly positioned.
a.
b.
c.
d.
Remove obstructions to water flow.
Adjust or replace.
Check for correct voltage. Oil motor if necessary.
Adjust.
11. Blowers won't operate on HEAT.
a.
b.
c.
d.
No power.
Faulty pushbutton switch.
Loose connections at pushbutton switch.
Thermostat set too low.
a.
b.
c.
d.
See #1.
Replace.
Tighten.
Adjust. Rotate control knob to “Warmer.”
12. **Equipment is noisy.
a. Blower rubbing against enclosure.
b. Blower motor bearings are dry.
c. Refrigerant absorbed in compressor oil after extended
shutdown.
d. Equipment improperly installed.
e. Loose electrical components.
f. Copper tubing vibrating.
g. Harmonics.
h. Loose sheet metal parts.
13. Insufficient or no heat.
a. No steam or hot water being applied.
b. No power.
c.
d.
e.
f.
g.
h.
Faulty pushbutton switch.
Loose connection at pushbutton switch.
Thermostat set too high.
Thermostat faulty.
No power output on transformer secondary.
Inoperative valve.
1) Steam valve N/C.
2) Hot water valve N/C.
i. Outdoor temperature less than 40°F on heat pump.
a. Adjust fan position on motor shaft to reposition fan motor
bracket assembly.
b. Lubricate with SAE #10 oil or replace motor.
c. Noise will disappear after equipment runs awhile.
d.
e.
f.
g.
Make necessary adjustments to components.
Fasten securely.
Adjust by bending or applying tape.
Occasionally equipment will have noisy operation for no
apparent reason. Inspection has revealed no loose components that might be the source of the noise. Due to the action
of the compressor, it is possible to have internal noise
develop if the refrigerant tubing has become bent even
slightly. To distinguish this condition from the simple rattle
producing vibration caused by loose screws, nuts and other
components, grasp the refrigerant tubing at various points
throughout the system until a point is found where the noise
is eliminated or reduced. Bend the copper tubing very gently
until the noise disappears.
h. Tighten.
a. Contact building management.
b. Check power supply line fuses, circuit breakers. Blown
fuses would indicate circuit overloading, a short circuit, or a
grounded condition in the circuit.
c. Replace.
d. Replace wire or tighten.
e. Adjust rotate knob to “Warm.”
f. Replace.
g. Replace.
h.
1) Temporarily lock valve open; replace.
2) Replace.
i. Review why supp. electric heat is NOT operating.
Notes:
† This guide was prepared with standard equipment in mind. If equipment is special, it may not be entirely applicable.
* If equipment is still in warranty.
**Note: Before trying to correct the noise, determine its cause: conditioned air blower, compressor or condenser blower. Operate the conditioned air blowers only. If
this doesn't cause the noise, operate on cooling. Then disconnect one compressor lead. If the noise stops, the compressor is the source. If not, it is caused
by the condenser blower.
Approximate Shipping Weights
ENR/ENH Size
07–150 Lbs.
09–150 Lbs.
12–150 Lbs.
15–160 Lbs.
Retrofit Kit–10 Lbs.
IM 435-3 / Page 7 (Rev. 5/99)
IM 435-3 / Page 8 (Rev 5/99)
2
TH9
4
3
BRN
2
8
HI
LO
240 VOLT
HIGH LOW
RED
ORG
6
9
230/277V BLK
277 VOLT
HIGH LOW
RED
BLK
OL
L1
S
M2
R
C
M3
14
12
C2
WHT
13
HTR1
HTR2
WHT
BRN
C1
N
BRN
C3
10
BRN
OH
SEE NOTE 1 BRN
SEE
TABLE
M1
A
HEAT
8
9
HI
L1
SEE NOTE 1 208V RED
7
TH1 1
A
LO
COOL SEE NOTE 2
5
2
7 BRN
6
TABLE A
208 VOLT
UNIT
SIZE HIGH LOW
BLU
BLK
ALL
L1
PB
OFF 2
L1
RECP.
(BY OTHERS)
208 & 240VAC
L1
L2
277VAC
11
N
4
3
PLUG IN
SPLICE
TAP CONN.
TERM CONN.
CAPPED WIRE
3
L2
3
4
LEGEND
SYMBOL
DESIGNATION
OH
SWITCH–OVERHEAT
OL
COMPRESSOR OVERLOAD
PB
SWITCH–PUSHBUTTON
TH1
THERMOSTAT–ROOM AIR
TH9
THERMOSTAT–LOW AMBIENT LOCKOUT (OPT.)
LEGEND
COMP TIE POINT
OPTIONAL WIRING
WIRED BY OTHERS
FACTORY WIRED
GROUND
CONFIDENTIAL PROPERTY OF
AAF–MCQUAY INCORPORATED
WIRING DIAGRAM
SG-45
UNIT MOUNTED THERMOSTAT
MANUAL CHANGEOVER
ELEC. HEAT 208/277V
PART
NO.
YE-1171A
NOTES:
1. CAP ALL UNUSED LEADS.
2. TH9 & BRN CONNECTING LEAD REPLACE WIRE NO.7
3. MAKE ELECTRICAL INSTALLATION IN ACCORDANCE
WITH JOB WIRING DIAGRAM COMPLYING WITH
NATIONAL & LOCAL ELECTRICAL CODES.
LOW AMBIENT LOCKOUT THERMOSTAT (OPT.)
TH-9 PREVENTS OPERATION OF COOLING WHEN OUTDOOR
AMBIENT DROPS BELOW 40OF.
WITH FAN SWITCH ON CONTROL PANEL SET AT "HI" OR "LO", ROOM
FANS RUN CONTINUOUSLY AT SELECTED SPEED.
WITH "COOL" BUTTON DEPRESSED, COMPRESSOR AND CONDENSER FAN
CYCLE TO MAINTAIN THERMOSTAT SETTING.
SEQUENCE OF OPERATION
WITH "HEAT" BUTTON DESPRESSED, ELEMENTS CYCLE TO MAINTAIN
THERMOSTAT SETTING.
ROOM FAN SPEED
COOLING
HEATING
LEGEND
SYMBOL
DESIGNATION
C1/3
CAPACITOR
HTR1/2
HEATER–ELECTRIC
M1
MOTOR–ROOM AIR
M2
COMPRESSOR
M3
MOTOR–OUTDOOR AIR FAN
Wiring Diagram – ENR Type 45 Replacement (Electric Heat)
Standard Manual Changeover Control
IM 435-3 / Page 9 (Rev. 5/99)
1
9
9
7
16
8
2
2
2
15
3
3
2
1
1
3
TH9
L1
47
TABLE A
208 VOLT
UNIT
SIZE HIGH LOW
BLU
BLK
ALL
6
8
HEAT
5
COOL
PB
OFF
L1
L1
1
OH
3
TDR1
45
A
240 VOLT
HIGH LOW
RED
ORG
9
4
PLUG
RECP.
(BY OTHERS)
L2
N
43
277 VOLT
HIGH LOW
RED
BLK
10
11
S
M2
CR
M3
BRN
RV
14
13
C2
BRN
C3
HI SEE NOTE 1
C1
BRN
HI
SEE
BRN
TABLE
M1
WHT
LO
A
L1
SEE NOTE 1
208V RED
TDR1 230&277V
BLK
H
H
OL
6
EE
LO
208,240VAC
L2
L1
L1
277VAC
4
3
4
3
LEGEND
2
L2
PLUG IN
SPLICE
TAP CONN.
TERM CONN.
CAPPED WIRE
12
46
WHT
42
N
COMPRESSOR OVERLOAD
SWITCH–PUSHBUTTON
REVERSING VALVE
RELAY–TIME DELAY
THERMOSTAT–ROOM AIR
THERMOSTAT–LOW AMBIENT LOCKOUT
DESIGNATION
SEQUENCE OF OPERATION
OL
PB
RV
TDR1
TH1
TH9
LEGEND
SYMBOL
COMP TIE POINT
OPTIONAL WIRING
WIRED BY OTHERS
FACTORY WIRED
GROUND
CONFIDENTIAL PROPERTY OF
AAF–MCQUAY INCORPORATED
WIRING DIAGRAM
SG-45
UNIT MOUNTED
THERMOSTAT– NO SETBACK
ELEC. HEAT 208/277 VOLT
PART
NO.
YE-1173
REVERSE CYCLE
NOTES:
1. CAP ALL UNUSED LEADS.
2. MAKE ALL CONNECTIONS IN ACCORDANCE WITH JOB WIRING
DIAGRAM, COMPLYING WITH NATIONAL AND LOCAL CODES.
LOW AMBIENT LOCKOUT THERMOSTAT
(TH9) PREVENTS OPERATION OF COMPRESSOR WHEN OUTDOOR
AMBIENT DROPS BELOW 40OF.
WITH FAN SWITCH ON CONTROL PANEL SET AT "HI" OR "LOW", ROOM FANS
RUN CONTINUOUSLY AT SELECTED SPEED.
WITH "COOL" BUTTON DEPRESSED, REVERSING VALVE ENERGIZED, COMPRESSOR
AND OUTDOOR AIR FAN CYCLE TO SATISFY THERMOSTAT REQUIREMENTS.
WITH "HEAT" BUTTON DEPRESSED, COMPRESSOR AND OUTDOOR AIR
FAN CYCLES (OUTDOOR AMBIENT ABOVE 40OF) TO MAINTAIN THERMOSTAT
REQUIREMENTS, (OUTDOOR AMBIENT BELOW 40OF) ELECTRIC ELEMENT CYCLES
TO MAINTAIN THERMOSTAT REQUIREMENTS.
ROOM FAN SPEED
COOLING
HEATING
LEGEND
SYMBOL
DESIGNATION
C1/3
CAPACITOR
CIRCUIT BREAKER (OPT.)
EE
ELECTRIC ELEMENT
M1
MOTOR–ROOM AIR
M2
COMPRESSOR
M3
MOTOR–OUTDOOR AIR FAN
OH
OVERHEAT SWITCH
Wiring Diagram – ENH Type 45 Replacement
(Heat Pump with Supplemental Electric Heat)
Standard Manual Changeover Control
IM 435-3 / Page 10 (Rev 5/99)
6
7
16
8
3
1
47
TH1
TH9
1
32
4
1
240 VOLT
HIGH LOW
RED
ORG
208V(RED),
240V(ORG),
277V(BRN)
2
15
3
3
2
2
2
L1
TABLE A
208 VOLT
UNIT
SIZE HIGH LOW
BLU
BLK
ALL
8
HEAT
9
5
COOL
PB
OFF
L1
L1
TDR1
H
27
BLU
6
H
OL
SEE NOTE 1
208V RED
& 277V BLK
43
277 VOLT
HIGH LOW
RED
BLK
3
ORG
L1
L1
L2
N
TDR1
V1
24V
M2
X1
C
R
S
BRN
M3
RV
28
19
C2
BRN
YEL
14
13
C3
31
M4 ORG
C1
HI
LO
SEE NOTE 1 BRN
SEE
HI
BRN
TABLE
WHT
M1
LO
A
A
45
SW2
RECP.
(BY OTHERS)
208,240VAC
L1
L2
277VAC
3
4
2
L2
3
4
LEGEND
PLUG IN
SPLICE
TAP CONN.
TERM CONN.
CAPPED WIRE
12
46
WHT
42
N
LEGEND
SYMBOL
DESIGNATION
RV
REVERSING VALVE
SW2
SWITCH–VENT MOTOR
TDR1
RELAY–TIME DELAY
TH1
THERMOSTAT–ROOM AIR
TH9
THERMOSTAT–LOW AMBIENT LOCKOUT
V1
VALVE–MOTORIZED (N.C.) (BY OTHERS)
X1
TRANSFORMER 24V CLASS 2
COMP TIE POINT
OPTIONAL WIRING
WIRED BY OTHERS
FACTORY WIRED
GROUND
CONFIDENTIAL PROPERTY OF
AAF–MCQUAY INCORPORATED
WIRING DIAGRAM
SG-45
UNIT MOUNTED
THERMOSTAT– NO SETBACK
WET HEAT 208/277 VOLT
PART
NO.
YE-1172
REVERSE CYCLE
NOTES:
1. CAP ALL UNUSED LEADS.
2. MAKE ALL CONNECTIONS IN ACCORDANCE WITH JOB
WIRING DIAGRAM, COMPLYING WITH NATIONAL AND LOCAL
CODES.
LOW AMBIENT LOCKOUT THERMOSTAT (OPT.)
(TH-9) PREVENTS OPERATION OF COMPRESSOR WHEN OUTDOOR
AMBIENT DROPS BELOW 40OF.
MOTORIZED VENT DAMPERS
WITH VENT SWITCH IN "AUTO" POSITION, VENT DAMPER OPENS
WHEN "COOL" OR "HEAT" BUTTON IS DEPRESSED WITH VENT
SWITCH IN "CLOSED" POSITION, VENT DAMPER REMAINS CLOSED.
VENT SWITCH IS CONCEALED BEHIND FRONT PANEL.
WITH FAN SWITCH ON CONTROL PANEL SET AT "HI" OR "LO", ROOM
FANS RUN CONTINUOUSLY AT SELECTED SPEED.
WITH "COOL" BUTTON DEPRESSED, REVERSING VALVE ENERGIZED,
COMPRESSOR AND CONDENSER FAN CYCLE TO SATISFY THERMOSTAT
REQUIREMENTS.
SEQUENCE OF OPERATION
WITH "HEAT" BUTTON DEPRESSED, COMPRESSOR AND OUTDOOR AIR FAN
CYCLES (OUTDOOR AMBIENT ABOVE 40OF) TO MAINTAIN THERMOSTAT
REQUIREMENTS, (OUTDOOR AMBIENT BELOW 40OF) MOTORIZEDC VALVE
CYCLES TO MAINTAIN THERMOSTAT REQUIREMENTS.
ROOM FAN SPEED
COOLING
HEATING
LEGEND
SYMBOL
DESIGNATION
C1/3
CAPACITOR
M1
MOTOR–ROOM AIR
M2
COMPRESSOR
M3
MOTOR–OUTDOOR AIR FAN
M4
MOTOR–VENT
OL
COMPRESSOR OVERLOAD
PB
SWITCH–PUSHBUTTON
Wiring Diagram – ENH Type 45 Replacement
(Heat Pump with Supplemental Hydronic Heat)
Standard Manual Changeover Control
IM 435-3 / Page 11 (Rev. 5/99)
2
2
8
9
HEAT
3
1
8
TH1
COOL
5
208V(RED)
240V(ORG)
277V(BRN)
7
TH9 SEE NOTE 2
BRN
BRN
4
TABLE A
240 VOLT
UNIT 120 or 277 VOLT
LOW HIGH LOW
SIZE HIGH
BLU
BLK
RED
BLK
ALL
2
L1
PB
OFF
2
L1
L1
PLUG
RECP.
(BY OTHERS)
L1
L1
C1
N
6
27
BLU
120,230 & 277V BLK
SEE NOTE 1
208V RED
6
OL
X1
BRN
BRN
M2
C2
12
28
YEL
BLK
C3
120 V.
BLK
208/277V
WHT
13
14
31
N
3
4
4
3
L2
3
LEGEND
PLUG IN
SPLICE
TAP CONN.
TERM CONN.
CAPPED WIRE
V1
24V
M3
S
C
R
SEE NOTE 1 BRN
BRN
HI
SEE
WHT
TABLE
M1
LO
A
SW2
ORG M4 ORG
32
HI
277 VOLT
HIGH LOW
RED
ORG
7
A
LO
208 & 240 VAC
L2
L1
120 & 277 VAC
COMP TIE POINT
OPTIONAL WIRING
WIRED BY OTHERS
FACTORY WIRED
GROUND
CONFIDENTIAL PROPERTY OF
AAF–MCQUAY INCORPORATED
WIRING DIAGRAM
SG-45
UNIT MOUNTED THERMOSTAT
MANUAL CHANGEOVER
WET HEAT 120,208,240 OR 277 VOLT
PART
NO.
YE-117OB
NOTES:
1. CAP ALL UNUSED LEADS.
2. TH9 & BRN CONNECTING LEAD REPLACE WIRE NO.7
3. MAKE ALL CONNECTIONS IN ACCORDANCE WITH JOB WIRING DIAGRAM,
COMPLYING WITH NATIONAL AND LOCAL CODES.
LOW AMBIENT LOCKOUT THERMOSTAT (OPT.)
TH-9 PREVENTS OPERATION OF COOLING WHEN OUTDOOR
AMBIENT DROPS BELOW 40OF.
MOTORIZED VENT DAMPER
WITH VENT SWITCH IN "AUTO" POSITION, VENT DAMPER OPENS
WHEN "COOL" OR "HEAT" BUTTON IS DEPRESSED WITH VENT
SWITCH IN "CLOSED" POSITION, VENT DAMPER REMAINS CLOSED.
VENT SWITCH IS CONCEALED BEHIND FRONT PANEL.
WITH FAN SWITCH ON CONTROL PANEL SET AT "HI" OR "LO", ROOM
FANS RUN CONTINUOUSLY AT SELECTED SPEED.
WITH "COOL" BUTTON DEPRESSED, COMPRESSOR AND CONDENSER FAN
CYCLE TO SATISFY THERMOSTAT REQUIREMENTS.
SEQUENCE OF OPERATION
WITH "HEAT" BUTTON DEPRESSED, MOTORIZED VALVE CYCLES TO SATISFY
THERMOSTAT REQUIREMENTS.
ROOM FAN SPEED
COOLING
HEATING
LEGEND
SYMBOL
DESIGNATION
C1/3
CAPACITOR
M1
MOTOR–ROOM AIR
M2
COMPRESSOR
M3
MOTOR–OUTDOOR AIR FAN
M4
MOTOR–VENT
OL
COMPRESSOR OVERLOAD
PB
SWITCH–PUSHBUTTON
SW2
SWITCH–VENT MOTOR
TH1
THERMOSTAT–ROOM AIR
TH9
THERMOSTAT–LOW AMBIENT LOCKOUT(OPT.)
V1
VALVE–MOTORIZED (N.C.) (BY OTHERS)
X1
TRANSFORMER–CLASS 2
Wiring Diagram – ENR Type 45 Replacement (Hydronic)
Standard Manual Changeover Control
Model Nomenclature
EN R 007 A 03 32
Auxiliary Heat
YY = None
HH = Hydronic
18 = 1.8 KW
24 = 2.4 KW
32 = 3.2 KW
43 = 4.3 KW
48 = 4.8 KW
Type 45 Replacement Chassis
Unit Type
R = Air Conditioner
H = Heat Pump
Unit Size
007 = Nominal 7,000 BTUH
009 = Nominal 9,000 BTUH
012 = Nominal 12,000 BTUH
015 = Nominal 15,000 BTUH
Voltage
11 = 120/60/1
03 = 208/60/1
39 = 240/60/1
40 = 277/60/1
Unit Vintage
Installation, Service and Warranty Policy
One-Year Warranty of Entire Conditioner
AAF–McQuay Incorporated, hereinafter referred to as the
“Company,” warrants to the original owner that each entire
Incremental Comfort Conditioner is free from defects in material
and workmanship. Any part or portion thereof which becomes
defective under normal use during the period of this warranty will
be repaired or replaced provided the Company’s examination shall
prove to its satisfaction that the part was or became defective
under normal use. This warranty contemplates that first year
maintenance labor was arranged for with the installer or
otherwise at the time the conditioner was purchased or installed.
The Company’s examination shall prove to its satisfaction that
the part was or became defective under normal use. This
warranty contemplates that first year maintenance labor was
arranged for with the installer or otherwise at the time the
conditioner was purchased or installed. The Company’s
obligations under this warranty are limited to: (a) repairing the
defective part or (b) furnishing a replacement part provided the
defective part is returned to the factory, transportation charges
prepaid. No reimbursement will be made for expenses incurred
in making field adjustments or replacements unless specifically
authorized in writing by the Company.
This warranty constitutes the buyer’s sole remedy. It is
given in lieu of all other warranties. There is no implied
warranty of merchantability or fitness for a particular purpose. In no event and under no circumstance shall the
Company be liable for incidental or consequential damages,
whether the theory be breach of this or any other warranty,
negligence, or strict tort.
No person (including any agent, salesman, dealer or
distributor) has authority to expand the Company’s obligation
beyond the terms of this express warranty, or to state that the
performance of the product is other than that published by the
Company.
One-Year Refrigeration Circuit Warranty
Hermetically sealed motor-compressor assemblies and all
components of refrigeration circuits not readily separable
therefrom are warranted to the original owner for one (1) year.
Refrigerating circuits consist of the motor-compressor assembly,
evaporator coil, condenser coil and interconnecting tubing.
Repairs under this warranty will be made at the Company’s
expense provided that the refrigeration circuit is delivered,
without shipping damage, transportation prepaid to the factory
or to a factory designated repair station, at the Company’s
option. This one-year warranty does not include any other parts
of the equipment such as filters, capacitors, protective devices,
or wiring. The Company is not obligated under this warranty for
field labor such as service for inspection, removing, packing
and/or re-installing the refrigeration circuit, nor for return
transportation charges.
General Conditions
The above warranties are void if the Company’s equipment has
been damaged, misused, subjected to abnormal use or service
or its serial number has been altered, defaced or removed, or
payment for the equipment is in default. The Company is not
responsible for service to correct conditions due to misapplication,
improper installation, inadequate wiring, incorrect voltage
conditions or unauthorized opening of the refrigeration circuit,
nor for consequential damages. In case the Company’s equipment
is installed in conjunction with cabinets, grilles, louvers, controls
or other parts manufactured by others, these warranties shall
apply only to the Company’s manufactured portion of the
equipment. The conditions of the warranty plan are effective for
eighteen (18) months from date of factory shipment. The
Company reserves the right to make a handling and inspection
charge in the case of parts or equipment improperly returned as
defective and/or as being in warranty.
AAF–McQuay Incorporated
4900 Technology Park Boulevard, Auburn, New York 13021-9030 USA (315) 253-2771
Printed on recycled paper containing at least 10% post-consumer recycled material.
IM 368-6 / Page 12 (Rev. 5/99)