Bard QC Series User manual

Page 1 of 29
INSTALLATION INSTRUCTIONS
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com
Manual No.: 2100-416L
Supersedes: 2100-416K
Date: 6-5-20
QC Series
Chilled Water Unit
Models:
QC501-A QC501-K QC501-L

Manual 2100-416L
Page 2 of 29
CONTENTS
Getting Other Information and Publications .... 3
QC Seris Water Source General Information...... 4
QC Model Nomenclature ....................................... 4
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 ................................. 9
Duct Work ......................................................... 13
Filters ............................................................... 13
Condensate Drain ............................................... 14
Mist Eliminator Service....................................... 15
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
Shipping Assembly – Bracket Locations.. 1 0
Figure 6 Installation of QC Wall Sleeve
Through a Window Opening................. 11
Figure 7 Installation With Free Blow Plenum ..... 12
Figure 8 Ducted Application ............................ 12
Figure 9 Supply Duct Connections.................... 13
Figure 10 Filter Location ................................... 13
Figure 11A Side Drain (Side View)........................ 14
Figure 11B Optional Rear Drain............................ 14
Figure 11C Rear Drain (Top View)......................... 14
Figure 12 Fresh Air Damper Removal.................. 16
Figure 13 Removal of Q-TEC ERV....................... 17
Figure 14 Remove Locking Screws from Wheels... 18
Figure 15 Unit Mounting Without Wall Sleeve...... 19
Figure 16 Component Location .......................... 20
Figure 17 Blower Motor Low Voltage Wire
Harness Plug ..................................... 22
Figure 18 Remote Thermostat Wiring "X" Option .. 23
Figure 19 Remote Thermostat Wiring "D" Option .. 24
Figure 20 Control Disassembly ........................... 27
Figure 21 Winding Test...................................... 27
Figure 22 Drip Loop .......................................... 27
Figure 23 Internal 2-Way Valve Piping................. 28
Figure 24 Internal 3-Way Valve Piping................. 29
Tables
Table 1 Factory Built-In Electric Heat .................. 4
Table 2 Electrical Specifications ......................... 4
Table 3 Cooling Performance Chart.................... 21
Table 4 Operating Voltage Range ....................... 21
Table 5 Wall Thermostat................................... 21
Table 6 Indoor Blower Performance ................... 25
Installation ............................................................. 18
Mounting the Unit .............................................. 18
Wiring – Main Power........................................... 20
Wiring – Low Voltage........................................... 21
General ............................................................. 21
Fluid Connections .............................................. 21
Low Voltage Connections..................................... 22
Start Up ................................................................... 25
Optional CFM .................................................... 25
Important Installer Note...................................... 25
Service Hints ..................................................... 25
Sequence of Operation........................................ 25
Troubleshooting ECMTM Motors.......................... 26

Manual 2100-416L
Page 3 of 29
GETTING OTHER INFORMATION AND PUBLICATIONS
These publications can help when installing the air
conditioner or heat pump. These can usually be found
at the 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/NFPA 90A
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 2100-416L
Page 4 of 29
Models
KW
QC501-A
240V-1 208V-1
BTUH BTUH
5.0 16,380 12,290
10.0 32,670 24,570
15.0 49,150 36,860
Models
SINGLE CIRCUIT DUAL CIRCUIT
Rated
Volts &
Phases
No.
Field
Power
Circuits

Minimum
Circuit
Ampacity

Maximum
External
Fuse or
Circuit
Breaker

Field
Power
Wire
Size

Ground
Wire
Size

Minimum
Circuit
Ampacity

Maximum
External
Fuse or
Circuit
Breaker

Field
Power
Wire
Size

Ground
Wire
Size
CKT
A
CKT
B
CKT
A
CKT
B
CKT
A
CKT
B
CKT
A
CKT
B
QC501-A0Z
-A05
-A10
-A15
230/208-1
1
1
1
1 or 2
7
33
58
83
15
35
60
90
14
8
6
4
14
10
10
8
–
–
–
50
–
–
–
33
–
–
–
50
–
–
–
40
–
–
–
8
–
–
–
8
–
–
–
10
–
–
–
10
QC501-K0Z 115-1 1 10 15 14 14 – – – – – – – –
QC501-L0Z 277-1 1 6.5 10 14 14 – – – – – – – –
QC SERIES WATER SOURCE GENERAL INFORMATION
QC Model Nomenclature
QC 50 1 – A 10 X X X X X X
TABLE 1
Factory Built-in Electric Heat Table
Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.
Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes.
These “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.
TABLE 2
Electrical Specifications
Ventilation Option
B - Blank Off Plate (no ventilation)
X - Barometric Fresh Air Damper (no exhaust)
V - Commercial Ventilator (w/Exhaust)
P - Commercial Ventilator (w/Exhaust) Motorized, Power Return
R - Energy Recovery Ventilator (w/Exhaust) - 230/208-60-1 versions only
KW
0Z - 0 KW
05 - 5 KW
10 - 10 KW
15 - 15 KW
(NOTE 1)
Volts & Phase
A - 230/208-60-1
K - 115-60-1
L - 277-60-1
Revision
Capacity
50 - 4 ton
Model Number
QC - Q-TEC™ Model
Filter Options
X - 1" Fiberglass
(Standard)
F - 2" Fiberglass
P - 2" pleated
Color
V - Platinum w/Slate
Front (vinyl)
4 - Gray Paint Climate Control
X - None
D - Electronic/prog/man/auto
Internal Controls
X - None
Valve Options
4 - 2-way valve
5 - 3-way valve
NOTE 1: Electric heat available
for -A models only

Manual 2100-416L
Page 5 of 29
GPM EWT CFM
BTUH Capacity (1000) BTUH Capacity (1000) Water Coil Pressure
Drop
Stage 1 Stage 1 and 2
Total Sensible Latent Total Sensible Latent PSIG Ft. Hd.
6
42 1000
15.1 10.5 4.6 38.5 25.3 13.2 1.9 4.4
8 16.4 11.1 5.3 41.5 26.8 14.7 3.3 7.5
10 17.4 11.7 5.7 43.2 27.4 15.8 4.9 11.3
6
44 1000
13.9 10.0 3.9 35.8 24.2 11.6 1.9 4.4
8 15.1 10.6 4.5 38.4 25.4 13.0 3.3 7.5
10 16.0 11.1 4.9 40.0 26.0 14.0 4.9 11.3
6
46 1000
12.8 9.6 3.2 33.0 23.0 10.0 1.9 4.4
8 13.9 10.1 3.8 35.3 24.0 11.3 3.3 7.5
10 14.7 10.6 4.1 36.9 24.6 12.3 4.9 11.3
6
48 1000
11.6 9.1 2.5 30.3 21.9 8.4 1.9 4.4
8 12.6 9.6 3.0 32.2 22.6 9.6 3.3 7.5
10 46.6 10.0 3.3 33.7 23.2 10.5 4.9 11.3
6
42 1200
15.9 11.5 4.4 42.1 29.0 13.1 1.9 4.4
8 17.4 12.2 5.2 46.0 30.6 15.4 3.3 7.5
10 18.8 12.8 6.0 49.3 31.9 17.4 4.9 11.3
6
44 1200
14.8 11.1 3.7 39.3 27.7 11.6 1.9 4.4
8 16.2 11.7 4.5 42.7 29.2 13.5 3.3 7.5
10 17.4 12.3 5.1 45.6 30.4 15.2 4.9 11.3
6
46 1200
13.6 10.7 2.9 36.4 26.5 9.9 1.9 4.4
8 14.9 11.3 3.6 39.5 27.9 11.6 3.3 7.5
10 16.1 11.7 1.1 42.0 29.0 13.0 4.9 11.3
6
48 1200
12.5 10.3 2.2 33.6 25.2 8.4 1.9 4.4
8 13.7 10.8 2.9 36.2 26.5 9.7 3.3 7.5
10 14.7 11.2 3.5 38.3 27.5 10.8 4.9 11.3
TABLE 3
Cooling Performance chart

Manual 2100-416L
Page 6 of 29
FIGURE 1
Unit Dimensions

Manual 2100-416L
Page 7 of 29
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.
Unit Removal from Skid
It is recommended that the unit not be removed from
the skid with a forklift.
The shipping brackets on each side of the unit must
be removed and discarded (see A on Figure 2). 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 B on Figure 2). The unit can be tipped
forward and slid down the edge of the skid until the
front wheels touch the ground (see C on Figure 2). The
wheels will not roll as they are shipped from the factory
locked. The back of the skid will have to be held down
FIGURE 2
Removal of Unit from Skid
to keep it from tipping up. The skid can be slid out
from under the unit. The unit can then be set upright.
Handling Unit after Removal from Skid
HOLD SKID DOWN
ASHIPPING BRACKETS BFRONT WHEELS OVER EDGE CFRONT WHEELS ON FLOOR
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 cannot 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 be 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 blade of the appliance cart should be
slid under the wheels of the unit as shown in Figure 3
on page 8. 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.
WARNING
Exercise extreme caution when pushing the
unit on the rollers. Handle and push from the
lower 1/3 of the unit. Ensure that debris is not
on the oor 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 insure that wheels are
locked before removing from skid. Extreme
caution must be taken to prevent injury to
personnel and damage to the unit.

Manual 2100-416L
Page 8 of 29
Removal of Wall Bracket from Shipping
Location
Units without Vent Options
The wall brackets are attached to the back of the unit,
as shown in the BACK VIEW in Figure 5 on page 10.
Remove and retain the wall brackets for use when
attaching the unit to the wall.
Units with Vent Options
Units equipped with a vent option require a wall sleeve.
Remove and retain the unit to sleeve brackets for use
when attaching the unit to the sleeve. The brackets
are attached to the shipping crate, as shown in FRONT
VIEW in Figure 5 on page 10.
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 3 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.
FIGURE 3
Proper Handling of Unit after Removal from Skid
Q-TEC Unit
(Right Side)
Strap
Appliance
Cart

Manual 2100-416L
Page 9 of 29
Minimum Installation Height
The minimum installation height of the unit with a free
blow plenum is 8' 6". This provides enough clearance
for the plenum to be removed (see Figure 7 on page
12).
The minimum installation height for ducted
applications is 8' 4½". This provides enough clearance
to install the duct work (see Figure 8 on page 12).
FIGURE 4
Installation of Unit through Wall with Wall Sleeve

Manual 2100-416L
Page 10 of 29
FIGURE 5
Shipping Assembly – Bracket Locations
BACK VIEW
Q-SERIES WALL BRACKETS(2)
PART #112-289 ATTACHED
TO BACK OF UNIT
NOTE: FOR USE WITH
BLANK-OFF PLATE OPTION ONLY
MIS-4162
NOTE: NOT A PICTORIAL REPRESENTATION
OF THE ACTUAL SIZES
FRONT VIEW
Q-SERIES SLEEVE MOUNTING BRACKETS (2).
ATTACHED TO SHIPPING PALLET.
SMALL CABINET
PART #112-289 (2 PLACES)
LARGE CABINET
PART #113-387 (2 PLACES)
SIDE TRIM
PART #134-178-7

Manual 2100-416L
Page 11 of 29
FIGURE 6
Installation of QC Wall Sleeve Through a Window Opening
SLEEVE
SIDE
WALL SLEEVE AND UNIT OPENING
SPACER TO MAINTAIN THE
REGARDLESS OF THE WINDOW SILL DIMENSIONS
GRILLE CLEARANCE
OUTSIDE GRILLE
MIS-1614 A
*THIS DIMENSION MUST REMAIN CONSTANT
SPACER FOR
WHEN FABRICATING UNIT AND WALL SLEEVE
SHOWN WITHOUT
SPACER SIZE UNDER UNIT= X + 2.5 - 32.750
32.750 RELATIONSHIP BETWEEN
UNIT
WALL SLEEVE
INSULATION
2.500
SILL HEIGHT= X
*32.750
Mounting Bracket
Bard P/N Where Used
112-234 Small CabinetModels
113-387 Large CabinetModels

Manual 2100-416L
Page 12 of 29
FIGURE 8
Ducted Application
FIGURE 7
Installation with Free Blow Plenum
CEILING
FLOOR
FLOOR

Manual 2100-416L
Page 13 of 29
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 airflow 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 1" 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 Q-TEC series unit has provision to attach a supply
air duct to the top of the unit. Duct connection size is
12" x 20". 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 9 for suggested attachment
method.
NOTE: Unit cabinet, supply air duct and free blow
plenum are approved for “0” clearance to
combustible material.
The Q-TEC series units 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.
FIGURE 9
Supply Duct Connections
SUPPLY DUCT
TO BE FIELD
SUPPLIED
ATTACHMENT
SCREWS TO BE
FIELD SUPPLIED
DUCT FLANGE PROVIDED
WITH UNIT
ROOM SIDE OF
QC UNIT
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". See specifications sheet for the correct cabinet
extension model number. 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 airflow up
to the Maximum ESP shown in Table 6 on page 25.
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" 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" filters. The tabs for the 1" filters must
be bent down to allow the 2" filters to slide in place.
FIGURE 10
Filter Location
RETURN AIR
GRILLE
FILTERS

Manual 2100-416L
Page 14 of 29
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" pipe
connection located on the right-hand cabinet side near
the rear and one on the cabinet rear panel. In these
FIGURE 11B
Optional Rear Drain
installations, the drain tube is to be slipped over the
pipe connection inside of the cabinet.
See Figures 11A, 11B and 11C.
NOTE: Whichever type of drain connection is used, a
“P” trap must be formed.
The side drain requires a water trap for proper drainage
(see Figure 11A). The drain can be routed through the floor
or through the wall. If the drain is to be routed through an
unconditioned space, it must be protected from freezing.
The drain line must be able to be removed from the unit
if it is necessary to remove the unit from the wall.
The rear drain can be used where there is a distance of
4 1/2" available between the unit and wall to install a
trap (see Figure 11B). 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 11C). If the drain is to be routed through
an unconditioned space, it must be protected from
freezing.
FIGURE 11A
Side Drain (Side View)
FIGURE 11C
Rear Drain (Top View)
SLEEVE
WALL BRACKET
WALL
(MAXIMUM
10" FOR REAR
DRAIN)
DRAIN LINE
COUPLINGS NOT
SHOWN BUT
RECOMMENDED
FOR EASE OF
REMOVABILITY FOR
SERVICE
WATER
TRAP
UNIT
Q-TEC UNIT

Manual 2100-416L
Page 15 of 29
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 below.
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.
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 re-installed.
Barometric Fresh Air Damper (Optional)
Before starting the removal 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 12 on page 16.
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.
Commercial Room Ventilator Option
Before starting 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.

Manual 2100-416L
Page 16 of 29
FIGURE 12
Fresh Air Damper Removal
MOUNTING SCREW

Manual 2100-416L
Page 17 of 29
Q-TEC Energy Recovery Ventilator 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 13.
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.
3. Underneath the heat recovery cassette there is a
power connector for the lower blower assembly. To
FIGURE 13
Removal of the Q-TEC Energy Recovery Ventilator
FRONT FILL
MOUNTING
SCREWS
LOWER BLOWER
ASSEMBLY POWER
CONNECTOR
POWER
CONNECTORS
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.

Manual 2100-416L
Page 18 of 29
INSTALLATION
Mounting the Unit
When installing a QC unit near an interior wall on the
left side, a minimum of 8" is required; 12" is preferred.
When installing a QC unit near an interior wall on the
right side, a minimum of 12" 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: See Figure 5 on page 10 for wall and
sleeve bracket locations on shipping crate and for a
pictorial representation of brackets.) 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. See Figure 5 for wall sleeve bracket.
Following are the steps for mounting the QC units; for
reference see Figure 15.
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 on page 6 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 14.
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
FIGURE 14
Removing Locking Screws from Wheels
the ceiling height or overlap the unit side trim.
There is sufficient length to trim up to a 10'-2"
ceiling.
REMOVE SCREWS
FROM WHEELS BEFORE
ROLLING INTO PLACE

Manual 2100-416L
Page 19 of 29
FIGURE 15
Unit Mounting without Ventilation Wall Sleeve
SIDE TRIM
(2 PIECES)
SIDE TRIM (2
PIECES)
WALL
MOUNTING
BRACKET
BOTTOM TRIM
EXTENSION
BOTTOM TRIM PIECE

Manual 2100-416L
Page 20 of 29
FIGURE 16
Component Location
SIDE FIELD
WIRE ENTRANCE
REMOTE THERMOSTAT
TERMINAL BLOCK
INDOOR BLOWER
CONTROL BOX/
CIRCUIT BREAKER
PANEL
Wiring – Main Power
Refer to the unit rating plate and/or Table 2 on page 4
for wire sizing information and maximum fuse or 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.