Bard QW242 User manual

Manual 2100-419E
Page 1 of 48
QW SERIES
WATER SOURCE
PACKAGED HEAT PUMP
INSTALLATION
INSTRUCTIONS
Models:
QW242 QW302
QW361 QW421
QW481 QW601
© Copyright2004
Manual No.: 2100-419E
Supersedes: 2100-419D
File: Vol II Tab 14
Date: 02-10-06
Bard Manufacturing Company
Bryan, Ohio 43506
Since 1914...Moving ahead, just as planned.
Earth Loop Fluid
Temperatures 25 – 110
Ground Water Temperature 45 – 75

Manual 2100-419E
Page 2 of 48
CONTENTS
Getting Other Information and Publications
For more information, contact these publishers:...... 4
QW General Information
QW Model Nomenclature ........................................ 5
Shipping Damage .................................................... 7
Unit Removal From Skid.......................................... 7
Handling Unit After Removal From Skid .................. 7
Removal of Wall Bracket from Shipping Location ... 8
General.................................................................... 8
Minimum Installation Height..................................... 8
Duct Work...............................................................11
Filters......................................................................11
Condensate Drain...................................................11
Mist Eleminator Service ......................................... 13
Installation Instructions
Mounting the Unit .................................................. 16
Wiring – Main Power ............................................. 19
Wiring – Low Voltage Wiring ................................. 19
General.................................................................. 19
Low Voltage Connections ...................................... 20
Start Up
Description of Standard Equipment ....................... 24
Compressor Control Module.................................. 24
Adjustments ........................................................... 24
Optional CFM ........................................................ 25
Important Installer Note ......................................... 25
Phase Monitor ....................................................... 25
Service Hints ......................................................... 25
Sequence of Operation.......................................... 25
Pressure Service Ports.......................................... 26
Pressure Tables ................................................ 29-30
Optional Accessories ............................................. 31
Closed Loop (Earth Coupled
Ground Loop Applications)
Circulation System Design .................................... 32
Copper Water Coil Application............................... 32
Start Up Procedure for Closed Loop System......... 33
Open Loop (Well SystemApplications)
Water Connections ................................................ 35
Copper Water Coil Limitations ............................... 35
Well Pump Sizing .................................................. 36
Start Up Procedure for Open Loop System ........... 36
Water Corrosion .................................................... 37
Remedies of Water Problems................................ 37
Lake and Pond Installations .................................. 37
Cooling Tower / Boiler Application ......................... 43
Service
Service Hints ......................................................... 43
Unbrazing System Components ............................ 43
Troubleshooting ECM Blower Motors ............. 44-45
Quick Reference Troupbleshooting Chart for
Water to Air Heat Pump.......................................... 46
Ground Source Heat Pump
Performance Report.......................................... 47-48

Manual 2100-419E
Page 3 of 48
Figures
Figure 1 Unit Dimensions..................................... 6
Figure 2 Removal of Unit From Skid .................... 7
Figure 3 Proper Handling of Unit After Removal
from Skid................................................ 8
Figure 4 Installation of Unit w/Wall Sleeve .......... 9
Figure 5 Installation With Free Blow Plenum ..... 10
Figure 6 Ducted Application ............................... 10
Figure 7 Supply Duct Connections .....................11
Figure 8 Condensate Drain................................ 12
Figure 8A Side Drain (Side View)......................... 12
Figure 8B Optional Rear Drain ............................. 12
Figure 8C Rear Drain (Top View).......................... 13
Figure 9 Fresh Air Damper Removal.................. 14
Figure 10 Removal of QTEC ERV......................... 15
Figure 11 Remove Locking Screws from Wheels 16
Figure 12 Unit Mounting Without Wall Sleeve ..... 17
Figure 13 Component Location............................ 18
Figure 14 Low Voltage Wire Harness Plug .......... 20
Figure 15 Remote Thermostat Wiring "X" Option 21
Figure 16 Remote Thermostat Wiring "A" Option 22
Figure 17 Remote Thermostat Wiring "D" Option 23
Figure 18 Fluid Connections w/Ventilation
Wall Sleeve.......................................... 27
Figure 19 Fluid Connections w/o Ventilation
Wall Sleeve.......................................... 28
Figure 20 Circulation System ............................... 32
Figure 21 Water Temperature and Pressure
Test Procedure.................................. 33
Figure 22 Performance Model WGPM-1C ........... 34
Figure 23 Performance Model WGPM-2C ........... 34
Figure 24 Piping Diagram .................................... 35
Figure 25 Cleaning Water Coil............................. 38
Figure 26 Water Well System .............................. 39
Figure 27 Water Source H/P Cooling Cycle......... 41
Figure 28 Water Source H/P Heating Cycle ........ 42
Tables
Table 1 Electrical Specifications ........................... 5
Table 2 Operating Voltage Range....................... 19
Table 3 Wall Thermostats and Subbase
Combinations ......................................... 19
Table 4 Indoor Blower Performance ................... 26
Table 5 Cooling Pressure Table .......................... 29
Table 6 Heating Pressure ................................... 30
Table 7 Optional Accessories ............................. 31
Table 8 Constant Flow Valves............................. 35
Table 9 Water Flow and Pressure Drop.............. 40
CONTENTS

Manual 2100-419E
Page 4 of 48
GETTING OTHER INFORMATION AND PUBLICATIONS
These publications can help you install the air
conditioner or heat pump. You can usually find these at
your local library or purchase them directly from the
publisher. Be sure to consult current edition of each
standard.
National Electrical Code ......................ANSI/NFPA 70
Standard for the Installation .............. ANSI/NFPA90A
of Air Conditioning and
Ventilating Systems
Standard for Warm Air ...................... ANSI/NFPA 90B
Heating and Air
Conditioning Systems
Load Calculation for Residential....... ACCA Manual J
Winter and Summer
Air Conditioning
Duct Design for Residential ............. ACCA Manual D
Winter and Summer Air Conditioning
and Equipment Selection
Closed-Loop/Ground Source Heat Pump ........ IGSHPA
Systems Installation Guide
Grouting Procedures for Ground-Source ......... IGSHPA
Heat Pump Systems
Soil and Rock Classification for the Design.... IGSHPA
of Ground-Coupled Heat Pump Systems
Ground Source Installation Standards ............. IGSHPA
Closed-Loop Geothermal Systems – Slinky.... IGSHPA
Installation Guide
FOR MORE INFORMATION, CONTACT
THESE PUBLISHERS:
ACCA Air Conditioning Contractors of America
1712 New Hampshire Avenue
Washington, DC 20009
Telephone: [phone]
Fax: [phone]
ANSI American National Standards Institute
11 West Street, 13th Floor
New York, NY 10036
Telephone: [phone]
Fax: [phone]
ASHRAE American Society of Heating Refrigerating,
and Air Conditioning Engineers, Inc.
1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Telephone: [phone]
Fax: [phone]
NFPA National Fire Protection Association
Batterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: [phone]
Fax: [phone]
IGSHPA International Ground Source
Heat Pump Association
490 Cordell South
Stillwater, OK 74078-8018

Manual 2100-419E
Page 5 of 48
QW SERIES WATER SOURCE GENERAL INFORMATION
QW MODEL NOMENCLATURE
1Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.
2Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes.
3These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electric
Code (latest revision), article 310 for power conductor sizing.
CAUTION: When more than one field power conductor circuit is run through one conduit, the conductors must be derated.
Pay special attention to Note 8 of Table 310 regarding Ampacity Adjustment Factors when more than three
conductors are in a raceway.
MODEL NUMBER
QW - QT
EC Model
Water Source
Heat Pump
CAPACITY
24 - 2 Ton
30 - 2½ Ton
36 - 3 Ton
42 - 3½ Ton
48 - 4 Ton
60 - 5 Ton
REVISION
VOLTS & PHASE
A - 230/208-60-1
B - 230/208-60-3
C - 460-60-3
KW
0Z - None
VENTILATION OPTIONS
B - Blank-off Plate
X - Barometric Fresh Air
Damper
V - Commercial Ventilator -
Motorized Spring Return
w/Exhaust
P - Commercial Ventilator -
Motorized power return
w/Exhaust
R - Energy Recovery
Ventilator w/Exhaust
FILTER OPTIONS
X - 1 Inch Fiberglass
(Standard)
F - 2 Inch Fiberglass
P - 2 Inch Pleated
INTERNAL CONTROLS
X - Standard
• High Pressure Switch
• Low Pressure Switch
• Compressor Time Delay
CLIMATE CONTROL OPTIONS
X - None
A - Electronic/Non Prog/Man/Auto
D - Electronic/Prog/Man/Auto
COLOR OPTIONS
V - Platinum w/Slate
Front (Vinyl)
4 - Gray (Painted)
QW 36 1 - A 0Z B X V X X X
COIL OPTIONS
X - Standard Cupronickel
Water Coil
4 - Copper Water Coil
TABLE 1
ELECTRICALSPECIFICATIONS
LEDOM
DETAR &STLOV ESAHP
TIUCRICELGNIS
DLEIF.ON REWOP STIUCRIC
3
MUMINIM TIUCRIC YTICAPMA
1
MUMIXAM LANRETXE ROESUF TIUCRIC REKAERB
2
DLEIF REWOP EZISERIW
2
DNUORG EZISERIW
Z0A-242WQ Z0B-242WQ Z0C-242WQ 1-802/032 3-802/032 3-064 1
1
1
91418 520251 012141 012141
Z0A-203WQ Z0B-203WQ Z0C-203WQ 1-802/032 3-802/032 3-064 1
1
1
126101 030251 012141 012141
Z0A-163WQ Z0B-163WQ Z0C-163WQ 1-802/032 3-802/032 3-064 1
1
1
429101 535251 010141 010141
Z0A-124WQ Z0B-124WQ Z0C-124WQ 1-802/032 3-802/032 3-064 1
1
1
720211 040351 8
0141
010141
Z0A-184WQ Z0B-184WQ Z0C-184WQ 1-802/032 3-802/032 3-064 1
1
1
134221 545351 8
8
41
010141
Z0A-106WQ Z0B-106WQ Z0C-106WQ 1-802/032 3-802/032 3-064 1
1
1
544361 065402 8
8
21
010121

Manual 2100-419E
Page 6 of 48
FIGURE 1
UNITDIMENSIONS

Manual 2100-419E
Page 7 of 48
SHIPPING DAMAGE
Upon receipt of equipment, the carton should be
checked for external signs of shipping damage. The
skid must remain attached to the unit until the unit is
ready for installation. If damage is found, the receiving
party must contact the last carrier immediately,
preferably in writing, requesting inspection by the
carrier’s agent.
It is recommended that the unit not be removed from the
skid with a fork lift.
The shipping brackets on each side of the unit must be
removed and discarded. See Figure 2-A on Page 7. The
return air grille panel can be removed to provide a place
to hold the unit. The unit can be slid forward on the skid
until the front wheels hang over the edge of the skid.
See Figure 2-B. The unit can be tipped forward and slid
down the edge of the skid until the front wheels touch
the ground. See Figure 2-C. The wheels will not roll.
They are shipped from the factory locked so they will
not roll. The back of the skid will have to be held down
to keep it from tipping up. The skid can be slid out from
under the unit. The unit can then be set upright.
FIGURE 2
REMOVAL OF UNIT FROM SKID
HOLD SKID DOWN
ASHIPPING BRACKETS BFRONT WHEELS OVER EDGE CFRONT WHEELS ON FLOOR
MIS-1603
The unit will have to be turned sideways and removed
from the skid to fit through a 36" doorway. If the door
height allows, the unit can be slid sideways through the
door.
If the unit can not be slid through the door, then the unit
will have to be put on a cart and tipped down to roll
through the door. It is recommended that an appliance
cart by used with a strap to hold the unit on the cart.
The wheels of the unit must be locked. If the wheels
were allowed to roll, the unit could roll off the cart. The
unit should always be carted from the left side. This is
the side where the compressor is located. See Figure 3.
The blade of the appliance cart should be slid under the
wheels of the unit. The strap of the appliance cart
should be placed around the unit and strapped tightly.
Help will be required to tip the unit back onto the cart.
The unit can be leaned far enough back to be rolled
through the door. Be careful when setting the unit back
up to keep from damaging the unit.
UNIT REMOVAL FROM SKID
HANDLING UNIT AFTER REMOVAL FROM
SKID
WARNING
Exercise extreme caution when pushing the
unit on the rollers. Handle and push from the
lower 1/3 of the unit. Insure that debris is not
on the floor where the unit is to be moved on
the rollers. Failure to do so could result in
the unit tipping over and causing bodily injury
and/or damage to the unit.
WARNING
This unit is heavy and requires more than one
person to handle and remove from the skid.
Check unit wheels to ensure that wheels are
locked before removing from skid. Extreme
caution must be taken to prevent injury to
personnel and damage to the unit.

Manual 2100-419E
Page 8 of 48
REMOVAL OF WALL BRACKET FROM
SHIPPING LOCATION (UNITS WITH
BLANK OFF PLATE ONLY)
The wall brackets are attached to the back of the unit.
Remove and retain the wall brackets for use when
attaching the unit to the wall. In units equipped with a
ventilator a wall sleeve is required and these two wall
brackets are not included. A different style bracket is
supplied with the sleeve assembly.
GENERAL
The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians.
The unit is designed for use with or without duct work.
For use without duct work, Plenum Box QPB** is
recommended.
These instructions explain the recommended method to
install the water source self-contained unit and the
electrical wiring connections to the unit.
These instructions and any instructions packaged with
any separate equipment required to make up the entire
air conditioning system should be carefully read before
beginning the installation. Note particularly “Start
Procedure” and any tags and/or labels attached to the
equipment.
While these instructions are intended as a general
recommended guide, they do not supersede any national
and/or local codes in any way. Authorities having
jurisdiction should be consulted before the installation is
made. See Page 4 for information on codes and
standards.
Size of unit for a proposed installation should be based
on heat loss calculation made according to methods of
Air Conditioning Contractors of America (ACCA). The
air duct should be installed in accordance with the
Standards of the National Fire Protection Systems of
Other Than Residence Type, NFPA No. 90A, and
Residence Type Warm Air Heating and Air
Conditioning Systems, NFPA No. 90B. Where local
regulations are at a variance with instructions, installer
should adhere to local codes.
MINIMUM INSTALLATION HEIGHT
The minimum installation height of the unit with a Free
Blow Plenum is 8 ft. 6 in. This provides enough
clearance for the plenum to be removed. See Figure 5.
The minimum installation height for ducted applications
is 8 ft. 4½ in. This provides enough clearance to install
the duct work. See Figure 6.
FIGURE 3
PROPER HANDLING OF UNIT
AFTER REMOVAL FROM SKID
APPLIANCE
CART
COMPRESSOR
QT EC UNIT
(RIGHT SIDE)
STRAP
MIS-1555

Manual 2100-419E
Page 9 of 48
FIGURE 4
INSTALLATION OF UNIT THROUGH WALL WITH WALL SLEEVE
MIS-1564

Manual 2100-419E
Page 10 of 48
FIGURE 6
DUCTEDAPPLICATION
MIS-1558
FIGURE 5
INSTALLATION WITH FREE BLOW PLENUM
CEILING
FLOOR
DUCT FLANGE
DUCT
FIXED CEILINGSUSPENDED
CEILING
FLOOR
MIS-1559
20 IN.
MINIMUM

Manual 2100-419E
Page 11 of 48
DUCT WORK
Any heat pump is more critical of proper operating
charge and an adequate duct system than a straight air
conditioning unit. All duct work must be properly sized
for the design air flow requirement of the equipment.
Air Conditioning Contractors of America (ACCA) is an
excellent guide to proper sizing. All duct work or
portions thereof not in the conditioned space should be
properly insulated in order to both conserve energy and
prevent condensation or moisture damage. When duct
runs through unheated spaces, it should be insulated
with a minimum of one inch of insulation. Use
insulation with a vapor barrier on the outside of the
insulation. Flexible joints should be used to connect the
duct work to the equipment in order to keep the noise
transmission to a minimum.
The QT EC series heat pump has provision to attach a
supply air duct to the top of the unit. Duct connection
size is 12 inches x 20 inches. The duct work is field
supplied and must be attached in a manner to allow for
ease of removal when it becomes necessary to slide the
unit out from the wall for service. See Figure 7 for
suggested attachment method.
NOTE: Unit cabinet, supply air duct and free blow
plenum are approved for “0” clearance to
combustible material.
The QT EC series heat pumps are designed for use with
free return (non-ducted) and either free blow with the
use of QPB Plenum Box or a duct supply air system.
The QPB Plenum Box mounts on top of the unit and has
both vertically and horizontally adjustable louvers on
the front discharge grille.
When used with a ducted supply, a QCX Cabinet
Extension can be used to conceal the duct work above
the unit to the ceiling. This extends 20" above the unit
for a total height above the floor of 10'-7/8". The unit is
equipped with a variable speed indoor blower motor
which increases in speed with an increase in duct static
pressure. The unit will therefore deliver proper rated air
flow up to the Maximum ESP shown in Table 5.
However, for quiet operation of the air system, the duct
static should be kept as low as practical, within the
guidelines of good duct design.
FILTERS
Two 1-inch throw away filters are supplied with each
unit. The filters fit into a fixed rack.
The filters are serviced from the inside of the building .
To gain access to the filters release the latch on the
circuit breaker door and one 1/4 turn fastener near the
bottom of the door. This door is hinged on the left so it
will swing open.
The internal filter brackets are adjustable to
accommodate 2-inch filters. The tabs for the 1-inch
filters must be bent down to allow the 2-inch filters to
slide in place.
CONDENSATE DRAIN
The condensate drain hose is routed down from the
evaporator drain pan on the right side of the unit into the
compressor compartment. There are three locations that
the drain can exit the cabinet. For a stand pipe type of
drain, the drain hose can exit the rear of the cabinet.
There is adequate hose length to reach the floor on the
right hand side of the unit.
If the drain is to be hard plumbed, there is a 3/4 inch
pipe connection located on the right hand cabinet side
near the rear and one on the cabinet rear panel. In these
installations the drain tube is to be slipped over the pipe
connection inside of the cabinet.
See Figures 8A, 8B and 8C.
NOTE: Whichever type of drain connection is used a
“P” trap must be formed. See Figure 8.
FIGURE 7
SUPPLYDUCTCONNECTIONS
SUPPLYDUCT
TO BE FIELD
SUPPLIED
ATTACHMENT
SCREWSTOBE
FIELDSUPPLIED
DUCTFLANGE
PROVIDEDWITHUNIT
ROOMSIDE
OF QW UNIT
MIS-978

Manual 2100-419E
Page 12 of 48
FIGURE 8
CONDENSATEDRAIN
FIGURE 8A
SIDE DRAIN (SIDE VIEW)
QT EC UNIT
FIGURE 8B
OPTIONAL REAR DRAIN
Thesidedrain requires awatertrapfor proper drainage. SeeFigure8A. Thedrain canberouted
through the floor or through the wall. Ifthe drainis tobe routedthrough anunconditioned
space,itmustbeprotectedfromfreezing
.Thedrain linemustbe abletoberemovedfromthe
unit if it is necessary to remove the unit from the wall.
MIS-1568
MIS-976 MIS-974

Manual 2100-419E
Page 13 of 48
The rear drain can be used with wall thickness of up to
10 inches where a water trap can be installed between
the unit and the interior wall. See Figure 8B. The trap
cannot extend beyond the edge of the unit or it will
interfere with the wall mounting bracket. The drain can
be routed through the floor or through the wall. If the
drain is routed through the wall, the drain line must be
positioned such that it will not interfere with the sleeve
flange or the grille. See Figure 8C. If the drain is to
be routed through an unconditioned space, it must
be protected from freezing.
FIGURE 8C
REAR DRAIN (TOP VIEW)
WALL
BRACKET
MIST ELIMINATOR SERVICE (Optional –
only used with one of the vent options)
A mist eliminator is supplied with the wall sleeve. The
mist eliminator is constructed of aluminum frame and
mesh. The mist eliminator is located in the top section
of the wall sleeve and can be removed from the inside of
the building without removing the unit from the wall.
This requires that the ventilation package must be
removed.
The steps necessary to remove each of the vent options
are listed following.
It is recommended that the mist eliminator be inspected
annually and serviced as required. The mist eliminator
can be inspected from the outside of the building by
looking through the outdoor grille. The mist eliminator
can be serviced from the outside. The outdoor grille
must be removed to do so.
WALL (MAXIMUM
10” FOR REAR
DRAIN)
DRAIN LINE
COUPLINGS NOT
SHOWN BUT
RECOMMENDED
FOR EASE OF
REMOVABILITY
FOR SERVICE
SLEEVE
WATER
TRAP
UNIT
MIS-977
The mist eliminator can be cleaned by washing
with soap and water. The excess water should
be shaken off the mist eliminator before it is
reinstalled.
BAROMETRIC FRESH AIR DAMPER
(Optional)
Before start to remove make sure the power has
been turned off. The hinged return air grille
panel must be opened. The fresh air damper
assembly can be seen on the back of the unit.
Refer to Figure 9.
1. The fresh air damper is attached to the back
of the unit with one screw on either side of
the assembly. Both of the screws must be
removed.
2. Once the mounting screws are removed, tilt
the assembly down and lift it out.
The mist eliminator can be seen through the
opening. The mist eliminator must be raised up
and the bottom can be pulled toward the front of
the unit.

Manual 2100-419E
Page 14 of 48
FIGURE 9
FRESH AIR DAMPER REMOVAL
COMMERCIALROOMVENTILATOROPTION
Before stating the removal make sure the power has
been turned off. The hinged return air grille must be
opened. The commercial room ventilator (CRV) can be
seen after the panel has been removed. The CRV must
be removed to gain access to the mist eliminator.
1. The two mounting screws in the front of the CRV
must be removed.
2. The power connectors for the CRV (located on the
right side of the unit) must be disconnected.
Squeeze the tabs on the sides of the connector and
pull straight out. Unplug both of the connectors.
3. Slide the CRV straight out of the unit.
The mist eliminator can be seen through the opening in
the back of the unit. The mist eliminator must be raised
up and the bottom can be pulled toward the front of the
unit and removed.
MOUNTING SCREW
MIS-1627

Manual 2100-419E
Page 15 of 48
QTECENERGY RECOVERYVENTILATOR
OPTION
Before starting the removal make sure that the power
has been turned off. The hinged return air grille panel
must be opened. The energy recovery ventilator
(QERV) can be seen after the panel is opened. To gain
access to the mist eliminator, the QERV must be
removed. Refer to Figure 10
1. The front fill plate of the QERV must be removed.
There is one screw on either side of the plate.
Remove these screws and remove the plate.
2. On either side of the QERV there are mounting
screws that hold the QERV in place. Remove both
of these screws.
FIGURE 10
REMOVAL OF THE QTEC ENERGY RECOVERY VENTILATOR
3. Underneath the heat recovery cassette there is a
power connector for the lower blower assembly. To
disconnect this plug, the tabs on both sides of the
plug must be squeezed to release the plug. While
squeezing the tabs, pull the plug out of the socket.
4. The QERV is plugged into the unit on the right side
of the unit. Both of these plugs must be
disconnected to remove the QERV. Squeeze the
tabs on the sides of the connector and pull straight
out.
5. Slide the QERV assembly straight out of the unit
being careful not to let the cassette slide out of the
QERV.
The mist eliminator can be seen through the opening in
the back of the unit. The mist eliminator must be raised
up and the bottom can be pulled toward the front of the
unit and removed.
MIS-1605
FRONT FILL
MOUNTING
SCREWS
LOWER BLOWER
ASSEMBLY POWER
CONNECTOR
POWER
CONNECTORS

Manual 2100-419E
Page 16 of 48
INSTALLATION INSTRUCTIONS
MOUNTING THE UNIT
When installing a QW unit near an interior wall on the
left side, a minimum of 8 inches is required; 12 inches is
preferred.
When installing a QW unit near an interior wall on the
right side, a minimum of 12 inches is required as
additional space is required to connect the drain.
This clearance is required to allow for the attachment of
the unit to the wall mounting brackets and the side trim
pieces to the wall.
This unit is to be secured to the wall when there is not a
vent sleeve used with the wall mounting brackets
provided. (NOTE: Wall mounting brackets are only
shipped on units with no vent inside.) The unit itself,
the supply duct, and the free blow plenum are suitable
for “0” clearance to combustible material.
NOTE: When a wall sleeve is to be used attach the
unit to the sleeve with bracket supplied with
the wall sleeve.
Following are the steps for mounting the QW units for
reference see Figure 12 on page 17.
1. Attach wall mounting bracket to the structure wall
with field supplied lag bolts. The fluid piping
connections are to be within the confines of this
bracket. See Figure 1 for cabinet openings and
location of fluid coil connection points.
2. Position the unit in front of the wall mounting
bracket.
3. Remove the locking screws from the wheels. Refer
to Figure 11.
4. Roll the unit up to the wall mounting bracket. The
unit must be level from side to side. If any
adjustments are necessary, shim up under the rollers
with sheets of steel or any substance that is not
affected by moisture.
5. Secure the unit to the wall bracket with provided #10
hex head sheet metal screws. There are prepunched
holes in the cabinet sides, and the bracket has slotted
holes to allow for some misalignment.
6. Position the bottom trim piece to the unit and attach
with provided screws (dark colored).
7. Position side trim pieces to the wall and attach with
field supplied screws. There are two long and two
short pieces supplied. The long pieces are to enclose
the gap behind the unit. The short pieces are to fill
the gap behind the cabinet extension or the free blow
plenum box. They may be cut to suit the ceiling
height or overlap the unit side trim. There is
sufficient length to trim up to a 10'2" ceiling.
FIGURE 11
REMOVING LOCKING SCREWS FROM
WHEELS
MIS-1523
REMOVE SCREWS
FROM WHEELS
BEFORE ROLLING
INTO PLACE

Manual 2100-419E
Page 17 of 48
FIGURE 12
UNIT MOUNTING WITHOUT VENTILATION WALL SLEEVE
(REFER TO MOUNTING INSTRUCTIONS ON PAGE 16)
SIDE TRIM
(2 PIECES)
SIDE TRIM (2
PIECES)
WALL MOUNTING
BRACKET
BOTTOM TRIM
EXTENSION
BOTTOM TRIM PIECE
MIS-1557

Manual 2100-419E
Page 18 of 48
FIGURE 13
COMPONENTLOCATION
SIDE FIELD
WIRE ENTRANCE
REMOTE THERMOSTAT
TERMINAL BLOCK
INDOOR BLOWER
CONTROL BOX/ CIRCUIT
BREAKER PANEL
ELECTRICAL
CONNECTION PANEL
MIS-1556

Manual 2100-419E
Page 19 of 48
WIRING – MAIN POWER
Refer to the unit rating plate and/or Table 2 for wire
sizing information and maximum fuse or “HACR Type”
circuit breaker size. Each unit is marked with a
“Minimum Circuit Ampacity”. This means that the
field wiring used must be sized to carry that amount of
current. Depending on the installed KW of electric heat,
there may be two field power circuits required. If this is
the case, the unit serial plate will so indicate. All
models are suitable only for connection with copper
wire. Each unit and/or wiring diagram will be marked
“Use Copper Conductors Only”. These instructions
must be adhered to. Refer to the National Electrical
Code (NEC) for complete current carrying capacity data
on the various insulation grades of wiring material. All
wiring must conform to NEC and all local codes.
The electrical data lists fuse and wire sizes (75°C
copper) for all models, including the most commonly
used heater sizes. Also shown are the number of field
power circuits required for the various models with
heaters.
The unit rating plate lists a “Maximum Time Delay
Relay Fuse” or “HACR Type” circuit breaker that is to
be used with the equipment. The correct size must be
used for proper circuit protection, and also to assure that
there will be no nuisance tripping due to the momentary
high starting current of the compressor motor.
The disconnect access door on this unit may be locked
to prevent unauthorized access to the disconnect.
The field wiring connections are located behind the top
panel in the circuit breaker panel. The return air panel
must be removed first. This panel is equipped with a
door switch, which shuts the unit down when it is
removed. The filter rack must be removed next.
WIRING – LOW VOLTAGE WIRING
230/208V, 1 PHASE AND 3 PHASE EQUIPMENT
DUAL PRIMARY VOLTAGE TRANSFORMERS
All equipment leaves the factory wired on 240V tap.
For 208V operation, reconnect from 240V to 208V tap.
The acceptable operating voltage range for the 240 and
208V taps are as noted in Table 2.
The standard Climate Control Option X is a remote
thermostat connection terminal block. See Figure 17 for
wiring diagram. Compatible thermostats are listed in
Table 3.
The Climate Control Option A is an electronic, non-
programmable manual or auto changeover thermostat.
The subbase of the thermostat is factory wired to the
front panel of the unit. Compatible for use with Bard
CS2000A Controller and Energy Recovery Ventilator.
The Climate Control Option D is an electronic,
programmable thermostat. The subbase of the
thermostat is factory wired to the front panel of the unit.
Compatible for use with Energy Recovery Ventilator or
Economizer.
GENERAL
This unit is equipped with a variable speed ECM motor.
The motor is designed to maintain rated airflow up to
the maximum static allowed. It is important that the
blower motor plugs are not plugged in or unplugged
while the power is on. Failure to remove power prior
to unplugging or plugging in the motor could result in
motor failure.
NOTE: The voltage should be measured at the field
power connection point in the unit and while
the unit is operating at full load (maximum
amperage operating condition).
TABLE 2
OPERATINGVOLTAGERANGE
PATEGNAR
V042612-352
V802781-022
TABLE 3
WALLTHERMOSTATS ANDSUBBASECOMBINATIONS
tatsomrehTesabbuSserutaeFtnanimoderP
710-4048 )9211R478T( 900-4048 )1621476Q( looCrotaeH otuAoN
810-3048 )4202N478T( 010-4048 )1621476Q( looC/taeHcitamotuA noitisoPrevoegnahC
240-3048 )0701G1158T( A/N looC/taeH/otuA/launaM cinortcelEelbammargorP-noN
430-3045 )08-49FI( A/N looC/taeH/otuA/launaM cinortcelEelbammargorP
CAUTION
Do not plug in or unplug blower motor con-
nectors while the power is on. Failure to do
so may result in motor failure.

Manual 2100-419E
Page 20 of 48
LOWVOLTAGECONNECTIONS
These units use a grounded 24 volt AC low voltage
circuit.
The “R” terminal is the hot terminal and the “C”
terminal is grounded.
“G” terminal or pins 6 and 1 of P2 are the fan inputs.
Both must be energized for proper fan operation. This
is done automatically in the factory installed climate
control options. If the climate control option is
abandoned and connections are made directly to P2 both
pins 6 and 1 of P2 must be energized for proper
operation.
“Y” terminal or pin 7 of P2 is the compressor input.
“B” terminal or pin 8 of P2 is the reversing valve input.
The reversing valve must be energized for heating
mode.
“R” terminal or pin 10 of P2 is 24 VAC hot.
“C” terminal or pin 11 of P2 is 24 VAC grounded.
“L” terminal or pin 12 of P2 is compressor lockout
output . This terminal is activated on a high or low
pressure trip by the compressor control module. This
is a 24 VAC output.
“W2” terminal or pin 9 of P2 is second stage heat (if
equipped). If the unit is equipped with an optional hot
water coil plenum box the water valve will be connected
to this terminal.
“O1” terminal of pin 5 of P2 is the ventilation input.
This terminal energizes any factory installed ventilation
option.
ROFSNOITCENNOCEGATLOVWOL LORTNOCCDD
ylnOnaFGezigrenE
edoMgnilooCG,YezigrenE
gnitaeHpmuPtaeHB,G,YezigrenE
gnitaeHegatSdn2 )deyolpmefi( 2W,GezigrenE
noitalitneV1O,GezigrenE
FIGURE 14
BLOWER MOTOR LOW VOLTAGE
WIRE HARNESS PLUG
MIS-1285
VIEWED FROM PIN END
VIEWED FROM PIN END