Bard W3RV2-R User manual

Literature Assembly
911-0650
Contains the following:
2100-615(A) Installation Instructions
2100-559(A) ECU Quick Start Guide
2100-560 ECU Advanced Program
7960-780 Supplemental Instructions
2100-034(G) User’s Guide
2100-479 Servicing Procedures
2110-1418(G) Replacement Parts Manual
7960-805(A) S8201-164 CCM Instructions
7960-420 Warranty Form

Page 1 of 24
WALL-MOUNTED
VARIABLE CAPACITY
ENVIRONMENTAL CONTROL UNIT
Models:
W3RV2-R
W3RV2-S
W3RV2-T
W3LV2-R
W3LV2-S
W3LV2-T
W5RV2-R
W5RV2-S
W5RV2-T
INSTALLATION INSTRUCTIONS
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com
Manual: 2100-615A
Supersedes: 2100-615
Date: 1-16-15
W5LV2-R
W5LV2-S
W5LV2-T
W6RV2-S
W6RV2-T
W6LV2-S
W6LV2-T

Manual 2100-615A
Page 2 of 24
Figures
Figure 1 Fresh Air Damper.....................................5
Figure 2 Unit Dimensions.......................................7
Figure 3A Mounting Instructions...............................8
Figure 3B Mounting Instructions...............................9
Figure 4 Electric Heat Clearance .........................10
Figure 5 Wall Mounting Instructions..................... 11
Figure 6 Wall Mounting Instructions..................... 11
Figure 7 Common Wall Mounting Installations.....12
Figure 8 Low Voltage Wiring Diagram..................14
Figure 9 Fan Blade Setting...................................20
Tables
Table 1 Fan Blade Dimensions...........................20
Table 2 Cooling Pressure....................................21
Table 3 Electrical Specications W*R/LV............22
Table 4 Recommended Airow ...........................23
Table 5 Maximum ESP Electric Heat Only..........23
Table 6 Electric Heat...........................................23
Table 7 Vent and Control Options.......................24
Getting Other Information and Publications 3
Wall Mount General Information
ECU Wall Mount Model Nomenclature .................... 4
Shipping Damage ................................................. 4
General ............................................................... 4
Duct Work ........................................................... 5
Filters ................................................................. 5
Fresh Air Intake ................................................... 5
Condensate Drain ................................................ 5
Installation
Wall Mounting Information .................................... 6
Mounting the Unit ................................................ 6
Minimum Clearances ............................................ 6
Clearances Required............................................. 6
Wiring – Main Power........................................... 13
Wiring – Low Voltage........................................... 13
Digital Thermostat/Controller ............................... 13
Start Up
General ............................................................. 15
Topping Off System Charge ................................. 15
Safety Practices ................................................. 15
Three Phase Scroll Compressor............................ 16
Phase Monitor.................................................... 16
Service Hints ..................................................... 16
Digital Controller ................................................ 16
Sequence of Operation........................................ 17
Cooling Sequence............................................... 18
Heating Sequence .............................................. 18
Lead/Lag Sequence ............................................ 18
Compressor Control Module................................. 19
Adjustments ...................................................... 19
Pressure Service Ports ........................................ 19
Troubleshooting
Fan Blade Setting Dimensions ............................. 20
Removal of Fan Shroud....................................... 20
R-410A Refrigerant Charge ................................. 20
CONTENTS

Manual 2100-615A
Page 3 of 24
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/NFPA 90A
of Air Conditioning and Ventilating Systems
Standard for Warm Air.......................ANSI/NFPA 90B
Heating and Air Conditioning Systems
Load Calculation for ......................... ACCA Manual J
Residential Winter and Summer Air Conditioning
Duct Design for Residential ............... ACCA Manual D
Winter and Summer Air Conditioning and Equipment
Selection
FOR MORE INFORMATION, CONTACT
THESE PUBLISHERS:
ACCA Air Conditioning Contractors of America
1712 New Hampshire Ave. N.W.
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, Refrigeration
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]

Manual 2100-615A
Page 4 of 24
WALL MOUNT GENERAL INFORMATION
SHIPPING DAMAGE
Upon receipt of equipment, the carton should be
checked for external signs of shipping damage. If
damage is found, the receiving party must contact
the last carrier immediately, preferably in writing,
requesting inspection by the carrier’s agent.
GENERAL
The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians.
This appliance is not intended for use by persons
(including children) with reduced physical, sensory
or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person
responsible for their safety.
Children should be supervised to ensure that they do
not play with the appliance.
The refrigerant system is completely assembled and
charged. All internal wiring is complete.
The unit is designed for use with or without duct work.
Flanges are provided for attaching the supply and
return ducts.
These instructions explain the recommended method
to install the air cooled 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 “Starting
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.
Vent option X does not have exhaust capability. May require separate field supplied barometric relief in building.
Blank-off plate recommended whenever maximum requirements against outside air intrusion are needed.
Stainless steel cabinet and coated coils recommended for maximum durability in all harsh environments.
Moderate duty door not recommended for harsh environments where wind and/or very fine dust are prevalent.
All units equipped with flush moderate duty door can be field retrofitted with the severe duty door.
Order DDD3A-color for W3R, DDD3L-color for W3L, DDD5A-color for W5R or W6R and DDD5L-color for W5L or W6L.
Environmental Control Unit (ECU) Wall Mount Model Nomenclature
W 3 R V 2 – R 10 X X S X 3 X
MODEL SERIES
Wall Mount
OTHER OPTIONS
X–None
S–Hard Start Kit
(Single Phase Only)
FILTER OPTIONS
X–1" Throwaway (Standard)
W–1" Washable
P–2" Pleated
COLOR OPTIONS
X–Beige (Standard) 6 – Dark Bronze
1–White A – Aluminum
4–Buckeye Gray S – Stainless Steel 
5 – Desert Brown
OUTLET OPTIONS
X–Extreme Duty Door (Standard)
M–Moderate Duty Door

COIL OPTIONS
X–Standard Copper Tube/
Aluminum Fin
1–Phenolic Coated Indoor Coil
2–Phenolic Coated Outdoor Coil
3–Phenolic Coated Indoor &
Outdoor Coil 
NOMINAL TONS
3–3 Ton (37,000 on 60Hz;
33,700 on 50 Hz)
5–5 Ton (54,000 on 60Hz;
49,200 on 50 Hz)
6–6 Ton (68,000 on 60Hz;
61,900 on 50 Hz)
SYSTEM DESIGN
Variable Capacity
(Digital Compressor) ECU
ELECTRICAL RATING
R–230/208-60-1 & 220/200-50-1
S–230/208-60-3 & 220/200-50-3
T–460-60-3 & 400-50-3
KW
Electric Heat @
Rated Voltage
COMPRESSOR &
CONTROLS LOCATION
R – Right Side
L – Left Side
REVISION
SPECIAL
FEATURES
VENTILATION OPTIONS
X–Barometric Fresh Air Damper (Standard)

B–Blank-off Plate 

Manual 2100-615A
Page 5 of 24
FILTERS
A 1-inch throwaway filter is standard with each unit.
The filter slides into position making it easy to service.
This filter can be serviced from the outside by removing
the filter access panel. A 1-inch washable filter and
2-inch pleated filter are also available as optional
accessories. The internal filter brackets are adjustable
to accommodate the 2-inch filter by bending two (2)
tabs down on each side of the filter support bracket.
FRESH AIR INTAKE
All units are built with fresh air inlet slots punched in
the service door.
If the unit is equipped with a fresh air damper
assembly, the assembly is shipped already attached
to the unit. The damper blade is locked in the
closed position. To allow the damper to operate, the
maximum and minimum blade position stops must be
installed. See Figure 1.
All capacity, efficiency and cost of operation
information is based upon the fresh air blank-off plate
in place and is recommended for maximum energy
efficiency.
The blank-off plate is available upon request from the
factory and is installed in place of the fresh air damper
shipped with each unit.
CONDENSATE DRAIN
A plastic drain hose extends from the drain pan at
the top of the unit down to the unit base. There are
openings in the unit base for the drain hose to pass
through. In the event the drain hose is connected to
a drain system of some type, it must be an open or
vented type system to assure proper drainage.
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 Association
for the Installation of Air Conditioning and Ventilating
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.
DUCT WORK
All duct work, supply and return, 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.
Refer to Maximum ESP of Operation Electric Heat Only
Table 5 on page 23.
Design the duct work according to methods given by
the Air Conditioning Contractors of America (ACCA).
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.
For model series W3R/LV, W5R/LV and W6R/LV a 1/4
inch clearance to combustible material for the first
three feet of duct attached to the outlet air frame is
required. See Wall Mounting Instructions and Figures
3A, 3B and 4 for further details.
Ducts through the walls must be insulated and all
joints taped or sealed to prevent air or moisture
entering the wall cavity.
Some installations may not require any return air duct.
A metallic return air grille is required with installations
not requiring a return air duct. The spacing between
louvers on the grille shall not be larger than 5/8 inch.
Any grille that meets with 5/8 inch louver criteria may
be used. It is recommended that Bard Return Air
Grille Kit RG2 through RG5 or RFG2 through RFG5
be installed when no return duct is used. Contact
distributor or factory for ordering information. If using
a return air filter grille, filters must be of sufficient size
to allow a maximum velocity of 400 fpm.
NOTE: If no return air duct is used, applicable
installation codes may limit this cabinet to
installation only in a single story structure.
FIGURE 1
FRESH AIR DAMPER

Manual 2100-615A
Page 6 of 24
Minimum Clearances Required to
Combustible Materials
MODELS SUPPLY AIR DUCT
FIRST THREE FEET CABINET
W3R/LV2 1/4" 0"
W5R/LV2
W6R/LV2 1/4" 0"
Clearances Required for Service Access
and Adequate Condenser Airflow
MODELS LEFT SIDE RIGHT SIDE
W3RV2 15" 20"
W3LV2 20" 15"
W5RV2, W6RV2 20" 20"
W5LV2, W6LV2 20" 20"
NOTE: For side by side installation of two (2) W*RV models there
must be 20" between units. This can be reduced to 15" by using
a W*LV model (left side compressor and controls) for the left unit
and W*R (right side compressor and controls) for right unit.
See Specification Sheet.
INSTALLATION
WALL MOUNTING INFORMATION
1. Two holes for the supply and return air openings
must be cut through the wall as shown in Figures
3A and 3B on pages 8 and 9.
2. On wood frame walls, the wall construction must
be strong and rigid enough to carry the weight of
the unit without transmitting any unit vibration.
3. Concrete block walls must be thoroughly inspected
to insure that they are capable of carrying the
weight of the installed unit.
MOUNTING THE UNIT
1. These units are secured by wall mounting brackets
which secure the unit to the outside wall surface at
both sides. A bottom mounting bracket, attached
to skid for shipping, is provided for ease of
installation, but is not required.
2. The supply air duct flange and the first 3 feet of
supply air duct require a minimum of 1/4 inch
clearance to combustible material for model series
W3R/LV, W5R/LV and W6R/LV. However, it is
generally recommended that a 1-inch clearance is
used for ease of installation and maintaining the
required clearance to combustible material. See
Figures 3A and 3B for details on opening sizes.
6. Remove packaged control panel door from return
opening. Use the instructions in the package
to mount the door on the unit after it has been
attached to the wall (Step #7). Disregard this step
if already supplied with outer control panel door.
7. Position unit in opening and secure with 5/16 lag
bolts; use 7/8 inch diameter flat washers on the
lag bolts.
8. Secure rain flashing to wall and caulk across entire
length of top. See Figures 3A & 3B.
9. For additional mounting rigidity, the return air
and supply air frames or collars can be drilled
and screwed or welded to the structural wall itself
(depending upon wall construction). Be sure to
observe required clearance if combustible wall.
10. On side-by-side installations, maintain a minimum
of 20 inches clearance on the control panel side of
the unit to allow access to control panel and heat
strips, and to allow proper airflow to the outdoor
coil. Additional clearance may be required to meet
local or national codes.
WARNING
Failure to provide the 1/4 inch clearance
between the supply duct and a combustible
surface for the rst 3 feet of duct can result in
re causing damage, injury or death.
3. Locate and mark lag bolt locations and bottom
mounting bracket location. See Figures 3A and
3B.
4. Mount bottom mounting bracket.
5. Hook top rain flashing, attached to front-right of
supply flange for shipping, under back bend of top.

Manual 2100-615A
Page 7 of 24
D
A
C
K
2.13
I
J
2.63
9.06
PML
O
E
.44 W
5.75
F
G
R
S1
S1
S1
S2
S2
T
H
Panel
Condenser
Return Air Opening
Back View
MIS-3077
Heater
Drain
Air Air Outlet
Front View
Cond.
Access
Side View
Inlet
Installation
Bottom
Panel
Bracket
Mounting
Side Wall
Electric
Brackets
Heat
Flashing
Shipping
Location
Optional
Electrical
Entrances
High Voltage
Electrical
Electrical
Entrance
Ventilation
Air
Vent Option
Door
Entrance
(Built In)
Top Rain
Low Voltage
Access Panel
(Lockable)
Filter Access
Disconnect
C. Breaker/
Built In
Rain Hood
4° Pitch
Supply Air Opening
MIS-3076
Entrances
Electrical
Side Wall
Brackets
Location
Shipping
(Built In)
Return Air Opening
Optional
Supply Air Opening
Mounting
Top Rain
Flashing
Bottom Installation
Bracket
Back View
P
L
O
E
R
S1
M
S1
S2
S2
T
N
S1
Q
B
Panel
Access
Cond.
Heat
Heater
(Lockable)
Access Panel
Low Voltage
Air
Inlet
Entrance
Electric
Electrical
Rain Hood
4° Pitch
Built In
Disconnect
Entrance
C. Breaker/
High Voltage
Electrical
Drain
Side View
C H
K
J
I
D
2.13
A
Panel
Door
Vent Option
Condenser
Air Outlet
Filter Access
Ventilation
Air
Front View
5.75
F
W
G
FIGURE 2
All dimensions are in inches. Dimensional drawings are not to scale.
W*RV
RIGHT
UNIT
W*LV
LEFT
UNIT
Dimensions of Basic Unit for Architectural and Installation Requirements (Nominal)
MODEL WIDTH
(W)
DEPTH
(D)
HEIGHT
(H)
SUPPLY RETURN
A B C B E F G I J K L M N O P Q R S1 S2 T
W3RV2
W3LV2 38.200 17.125 70.563 7.88
27.88 13.88 27.88 40.00 10.88 25.75 17.93 26.38 28.75 29.25 27.00 2.75 39.19 22.75 9.14 4.19 12.00 12.00 5.00
W5RV2
W5LV2 42.075 22.432 84.875 9.88
29.88 15.88 29.88 43.88 13.56 31.66 30.00 32.31 26.94 34.69 32.43 3.37 42.88 23.88 10.00 1.44 16.00 16.00 1.88
W6RV2
W6LV2 42.075 22.432 94.875 9.88
29.88 15.88 29.88 43.88 13.56 41.66 30.00 42.31 36.94 44.69 42.43 3.37 42.88 33.88 10.00 1.44 16.00 21.00 1.88

Manual 2100-615A
Page 8 of 24
FIGURE 3A
W3RV2, W3LV2
MOUNTING INSTRUCTIONS
28"
A
C
D
C
12" 12" 12" 12" 12"
5 1
16"
B E
14"
411
16" 411
16"
4"
Typ.
27
8"
7 8"7
8"
4"
Typ. 7
8"
31
8"
MIS-3078
TOP FLASHING AT TIME OF INSTALLATION.
Right Side View
SUPPLY AIR
OPENING
W*R UNIT SHOWN,W*LUNIT
SUPPLIED
ENTIRE LENGTH OF TOP.
NOTES:
OF CAULKING ALONG
PANEL
FOAM AIR SEAL
WALL STRUCTURE
FOUR SIDES OF SUPPLY AIR DUCT IS REQUIRED
FROM COMBUSTABLE
MATERIALS
RAIN FLASHING
TOP
HEATER ACCESS
1/4" CLEARANCE ON ALL
SILICONE CAULKING BE PLACED BEHIND IS ON OPPOSITE (LEFT) SIDE.
THE SIDE MOUNTING FLANGES AND UNDER
CONTROLS AND HEATER ACCESS
DUCT
RETURN AIR
SEAL WITH BEAD
IT IS RECOMMENDED THAT A BEAD OF
WALL
Wall Opening and Hole Location View
REQUIRED DIMENSIONS TO MAINTAIN
Return Opening
16 7/84 7/164 5/89 7/829 7/8
17 5/83 11/165 3/88 3/8
28 3/8
EDCBA
COMBUSTIBLE MATERIALS RECOMMENDED 1" CLEARANCE FROM REQUIRED DIMENSIONS TO MAINTAIN
COMBUSTIBLE MATERIALS 1/4" MIN. CLEARANCE FROM
Supply Opening

Manual 2100-615A
Page 9 of 24
FIGURE 3B
W5RV2, W5LV2, W6RV2, W6LV2
MOUNTING INSTRUCTIONS
B
16"
16" 16" 16" 16"
1
7 8
"6
1 2
" 6
1 2
"2
1 8
"
7 8
"
1" 3"
4"
Typ.
4"
Typ.
6
1 2
"30"
E
16"
A CC
3
1 8
"
D
WALL STRUCTURE
AIR DUCT IS REQUIRED
SILICONE CAULKING BE PLACED BEHIND
1/4" MIN. CLEARANCE FROM REQUIRED DIMENSIONS TO MAINTAIN COMBUSTIBLE MATERIALS
FROM COMBUSTABLE
REQUIRED DIMENSIONS TO MAINTAIN
RECOMMENDED 1" CLEARANCE FROM COMBUSTIBLE MATERIALS
A
29
C D EB
10 1/2 6 1/4 1 1/4 29 3/430 1/2
12 5 1/2 2
PANEL SUPPLY AIR
NOTES:
RETURN AIR
2
Dimension is 10" on T48H1 & T60H1.
3
Dimension is 6" on T48H1 & T60H1.
2
WALL
DUCT
OPENING
THE SIDE MOUNTING FLANGES AND UNDER
FOUR SIDES OF SUPPLY
FOAM AIR SEAL
TOP FLASHING AT TIME OF INSTALLATION.
TOP.
MATERIALS
HEATER ACCESS
1/4" CLEARANCE ON ALL
IT IS RECOMMENDED THAT A BEAD OF
1
RAIN FLASHING SUPPLIED
Right Side ViewWall Opening and Hole Location View
1
32
Dimension is 21" on 95" tall units.
1
Supply Opening
Return Opening
SEAL WITH BEAD
OF CAULKING ALONG
ENTIRE LENGTH OF
TOP
3
MIS-3079

Manual 2100-615A
Page 10 of 24
FIGURE 4
ELECTRIC HEAT CLEARANCE
W3RV2, W3LV2, W5RV2, W5LV2, W6RV2, W6LV2
WARNING
A minimum of 1/4 inch clearance must be maintained between
the supply air duct and combustible materials. This is required for
the rst 3 feet of ducting.
It is important to insure that the 1/4 inch minimum spacing is
maintained at all points.
Failure to do this could result in overheating the combustible
material and may result in a re causing damage, injury or death.
SIDE SECTION VIEW OF SUPPLY AIR DUCT FOR
WALL MOUNTED UNIT SHOWING 1/4 INCH CLEAR-
ANCE TO COMBUSTIBLE SURFACES.

Manual 2100-615A
Page 11 of 24
FIGURE 5
WALL MOUNTING INSTRUCTIONS
FIGURE 6
WALL MOUNTING INSTRUCTIONS
WOOD FRAME WALL INSTALLATION
BRACKET. MOUNT ON
INSTALLING UNIT.
OPENING OPENING
SUPPLY AIR
DUCT
SUPPLY AIR
OPENING
RETURN AIR
CONCRETE BLOCK WALL INSTALLATION SIDE VIEW
OPENING
RETURN AIR
WALL BEFORE
OPENING
WOOD OR STEEL SIDING
RETURN AIR
BOTTOM MOUNTING
BEFORE INSTALLATION
WALL STRUCTURE
MOUNT ON UNIT
FACTORY SUPPLIED
RAIN FLASHING.
SUPPLY AIR
MIS-3080
I
A
C
K
E + 1.000
B
1.000
L
C
STRUCTURAL STEEL
2 x 6
SEE UNIT DIMENSIONS, FIGURE 2,
FOR ACTUAL DIMENSIONS.
SUPPLY DUCT
OPENING
MIS-3081
FRAMING MATERIAL
ALL AROUND DUCT
2 x 4'S, 2 x 6'S &/OR
OPENING
RETURN DUCT
INTERIOR FINISHED WALL
OVER FRAME
EXTERIOR FINISH WALL
OVER FRAME
ATTACH TO BOTTOM
PLATE OF WALL
1.000" CLEARANCE
ALL AROUND DUCT
ATTACH TO TOP
PLATE OF WALL
1.000" CLEARANCE
THIS STRUCTURAL MEMBER
LOCATED TO MATCH STUD
SPACING FOR REST OF WALL.
ASECOND MEMBER MAY BE
REQUIRED FOR SOME WALLS.
SEE FIGURES 3A & 3B – MOUNTING INSTRUCTIONS

Manual 2100-615A
Page 12 of 24
FIGURE 7
COMMON WALL MOUNTING INSTALLATIONS
RAFTERS
RAFTERS RAFTERS
RAIN
GRILLE
RAFTERS
SLEEVE
FALSE WALL INSTALLATION
DUCTED SUPPLY
RETURN AT UNIT
FREE AIR FLOW
NO DUCT
SUPPLY AIR
RETURN AIR
CEILING
OR BELOW CEILING RAFTERS AS SHOWN
LOWERED
RETURN AIR RETURN AIR
GRILLE
OUTSIDE
SPACE
FALSE WALL
WALL
RETURN AIR
RETURN AIR GRILLE
OUTSIDE
WALL
OUTSIDE
WALL
SUPPLY AIR DUCT
SUPPLY AIR DUCT
SUPPLY AIR DUCT
CLOSET INSTALLATION
OUTSIDE
W/ GRILLE
RETURN AIR
OPENING W/ GRILLE
RAIN
FLASHING
RAIN
FLASHING
SUPPLY DUCT MAYBE LOCATED IN AN ATTIC
OR BELOW CEILING RAFTERS AS SHOWN
FINISHED CEILING
SURFACE
CLOSET WALL
WALL
RAISED FLOOR
SUPPLY DUCT MAYBE LOCATED IN AN ATTIC
OPENING W/ GRILLE
SUPPLY AIR DUCT
CEILING SURFACE
WALL SLEEVE
SUPPLY DUCT MAY BE LOCATED IN AN ATTIC
OR BELOW CEILING RAFTERS AS SHOWN
FINISHED CEILING SURFACE
WALL
FLASHING
FINISHED CEILING SURFACE
RAIN
FLASHING
FINISHED
MIS-3082

Manual 2100-615A
Page 13 of 24
DIGITAL THERMOSTAT/CONTROLLER
Refer to the unit rating plate for wire sizing information
and maximum fuse or circuit breaker size. Each
outdoor 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 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 control access door on this unit may be locked
to prevent unauthorized access to the disconnect. To
lock, insert a padlock through the hole in the lower
portion of one or both of the door latches. This will
prevent the latches from being turned.
See “Start Up” section for important information on
three phase scroll compressor start ups.
See Table 3 on page 22 for Electrical Specifications.
WIRING – MAIN POWER
These units are rated for 60/50 Hz operation as follows.
NOTE: This system must be controlled only by the
Bard 8403-066 Digital Thermostat/Controller
that is supplied with the unit. See below
for wiring and pages 17-18 for operating
sequences.
Electrical
Code
Volts
Hz
Phase
Operating
Voltage
Range
-R 230/208-60-1
220/200-50-1
197 - 253
180 - 242
-S 230/208-60-3
220/200-50-3
197 - 253
180 - 242
-T 460-60-3
400-50-3
414 - 506
380 - 440
IMPORTANT INSTALLER NOTE
Must be followed for proper operation of all controls.
These models are designed for dual 60/50Hz
operation. –R and –S models use a 240/208Vx24V
control transformer, and are shipped from the factory
on the 208V tap. The –R and –S models may require
reconnection of the 24V transformer primary from 240
to 208V tap for either 60 or 50Hz:
Supply Voltage Hz Transformer Primary Tap
253-216 60 or 50 240
220-180 60 or 50 208
Terminal Function Type Form
+B MSTP + (not used) Communications
-A MSTP - (not used) Communications
IN4 Outdoor Temperature Sensor Input 10K OHM Type 3
IN3 Pressure Transducer Input 0-5 VDC, 0-700
PSIG
GND Sensor Grounds Input
IN2 Lockout Alarm Input Relay Closure
24 COM 24VAC Com Power
24V 24VAC Power
OUT 9 Fan Motor Control Analog Output 0-10VDC
GND7-9 Control Ground Analog Output
OUT 8 Unloader Solenoid Control Analog Output 0 or 5VDC PWM
OUT 7 Blower Motor Control Analog Output 0-10VDC
RLY 4 Heater Contactor #1 Relay Output Relay
SC 4-6 24VAC to Relay Outputs 4-6 Power
RLY 5 Heater Contactor #2 Relay Output Relay
RLY 6 (not used)
RLY 3 (not used)
SC1-3 24VAC to Relay Outputs 1-3 Power
RLY 2 Compressor Contactor Relay Output Relay
RLY 1 (not used)
WIRING – LOW VOLTAGE

Manual 2100-615A
Page 14 of 24
FIGURE 8
LOW VOLTAGE WIRING DIAGRAM
C
5
3
1
6
4
R
7
BLOCK F
E
Y1
G
W1
W2
Y
UNIT LOW
VOLTAGE
TERMINAL
2
IN3
IN4
-A
+B
24V
24 COM
IN2
GND
OUT 9
GND 7-9
OUT 8
OUT 7
RLY 6
SC 4-6
RLY 5
RLY 4
RLY 3
SC 1-3
RLY 2
RLY 1
MIS-2852 C
8403-066 DIGITAL
CONTROLLER

Manual 2100-615A
Page 15 of 24
START UP
THESE UNITS REQUIRE R-410A
REFRIGERANT AND POLYOL ESTER
OIL.
GENERAL
1. Use separate service equipment to avoid cross
contamination of oil and refrigerants.
2. Use recovery equipment rated for R-410A
refrigerant.
3. Use manifold gauges rated for R-410A (800
psi/250 psi low).
4. R-410A is a binary blend of HFC-32 and HFC-
125.
5. R-410A is nearly azeotropic—similar to R-22 and
R-12. Although nearly azeotropic, charge with
liquid refrigerant.
6. R-410A operates at 40-70% higher pressure than
R-22, and systems designed for R-22 cannot
withstand this higher pressure.
7. R-410A has an ozone depletion potential of zero,
but must be reclaimed due to its global warming
potential.
8. R-410A compressors use polyol ester oil.
9. Polyol ester oil is hygroscopic; it will rapidly absorb
moisture and strongly hold this moisture in the oil.
10. A liquid line dryer must be used—even a deep
vacuum will not separate moisture from the oil.
11. Limit atmospheric exposure to 15 minutes.
12. If compressor removal is necessary, always plug
compressor immediately after removal. Purge with
small amount of nitrogen when inserting plugs.
TOPPING OFF SYSTEM CHARGE
If a leak has occurred in the system, Bard
Manufacturing recommends reclaiming, evacuating
(see criteria above), and charging to the nameplate
charge. If done correctly, topping off the system
charge can be done without problems.
With R-410A, there are no significant changes in the
refrigerant composition during multiple leaks and
recharges. R-410A refrigerant is close to being an
azeotropic blend (it behaves like a pure compound
or single component refrigerant). The remaining
refrigerant charge, in the system, may be used after
leaks have occurred and then “top-off” the charge by
utilizing the pressure charts on the inner control panel
cover as a guideline.
REMEMBER: When adding R-410A refrigerant, it
must come out of the charging cylinder/tank as a liquid
to avoid any fractionation, and to insure optimal system
performance. Refer to instructions for the cylinder that
is being utilized for proper method of liquid extraction.
SAFETY PRACTICES
1. Never mix R-410A with other refrigerants.
2. Use gloves and safety glasses, Polyol ester oils can
be irritating to the skin, and liquid refrigerant will
freeze the skin.
3. Never use air and R-410A to leak check; the
mixture may become flammable.
4. Do not inhale R-410A—the vapor attacks
the nervous system, creating dizziness, loss
of coordination and slurred speech. Cardiac
irregularities, unconsciousness and ultimate death
can result from breathing this concentration.
5. Do not burn R-410A. This decomposition
produces hazardous vapors. Evacuate the area if
exposed.
6. Use only cylinders rated DOT4BA/4BW 400.
7. Never fill cylinders over 80% of total capacity.
8. Store cylinders in a cool area, out of direct
sunlight.
9. Never heat cylinders above 125°F.
10. Never trap liquid R-410A in manifold sets, gauge
lines or cylinders. R-410A expands significantly
at warmer temperatures. Once a cylinder or line is
full of liquid, any further rise in temperature will
cause it to burst.
WARNING
Failure to conform to these practices
could lead to damage, injury or death.

Manual 2100-615A
Page 16 of 24
IMPORTANT INSTALLER NOTE
For improved start up performance wash the indoor coil
with a dish washing detergent.
THREE PHASE SCROLL COMPRESSOR
Scroll compressors, like several other types of
compressors, will only compress in one rotational
direction. Direction of rotation is not an issue with
single phase compressors since they will always start
and run in the proper direction.
However, three phase compressors will rotate in either
direction depending upon phasing of the power.
Since there is a 50-50 chance of connecting power
in such a way as to cause rotation in the reverse
direction, verification of proper rotation must be made.
Verification of proper rotation direction is made by
observing that suction pressure drops and discharge
pressure rises when the compressor is energized.
Reverse rotation also results in an elevated sound level
over that with correct rotation, as well as substantially
reduced current draw compared to tabulated values.
Verification of proper rotation must be made at the time
the equipment is put into service. If improper rotation
is corrected at this time, there will be no negative
impact on the durability of the compressor. However,
reverse operation for over one hour may have a negative
impact on the bearing due to oil pump out.
NOTE: If compressor is allowed to run in reverse
rotation for several minutes, the compressor’s
internal protector may trip.
All three phase compressors are wired identically
internally. As a result, once the correct phasing
is determined for a specific system or installation,
connecting properly phased power leads to the same
Fusite terminal should maintain proper rotation
direction.
The direction of rotation of the compressor may be
changed by reversing any two line connections to the
unit.
PHASE MONITOR
All units with three phase scroll compressors are
equipped with a 3 phase 60/50 Hz line monitor to
prevent compressor damage due to phase reversal. No
changes required for 60 or 50 Hz operation.
The phase monitor in this unit is equipped with two
LEDs. If the Y signal is present at the phase monitor
and phases are correct the green LED will light.
If phases are reversed, the red fault LED will be lit and
compressor operation is inhibited.
If a fault condition occurs, reverse two of the supply
leads to the unit. Do not reverse any of the unit factory
wires as damage may occur.
SERVICE HINTS
1. Caution owner/operator to maintain clean air
filters at all times. Also, not to needlessly close
off supply and return air registers. This reduces
airflow through the system, which shortens
equipment service life as well as increasing
operating costs.
2. Check all power fuses or circuit breakers to be sure
they are the correct rating.
3. Periodic cleaning of the outdoor coil to permit full
and unrestricted airflow circulation is essential.
DIGITAL CONTROLLER
The W3R/LV2 through W6R/LV2 variable capacity
air conditioners utilize dedicated controllers and
components to optimize this unit for cooling operation
from -40°F up to 131°F (-40°C to +55°C). These
units are dual rated for 200-240V operation on both
50 and 60 Hz. Please read the following sequence
of operation before attempting any troubleshooting or
repair. Troubleshooting and repair procedures will be
outlined below and later in this manual.
These models use a digital compressor and variable
speed indoor and outdoor motors. The motors and
compressor must be replaced with the exact same
component to maintain the above stated temperature
and voltage ranges of operation. The units are
controlled by a Bard digital thermostat/controller. This
thermostat/controller contains proprietary programming
and must be replaced with the exact same component
to ensure proper operation.
See Controller Quick Start Manual 2100-559 and
Controller Advanced Programming Manual 2100-560
for complete details.

Manual 2100-615A
Page 17 of 24
SEQUENCE OF OPERATION
Modes of Operation
Cool Only Mode:
•
Compressor will modulate from 100% down to 20%.
• Compressor will cycle off if thermostat/controller
set-point is reached.
Heat Only Mode:
• Electric heat Stage 1 operates at 1st-stage heating set-
point.
• Electric heat Stage 2 (if equipped) operates on 2nd
stage (-2°F below heating set-point).
Auto Mode:
• Cooling or heating automatically selected based on
building temperature vs. thermostat/controller set-
points and operates as described above.
CCVC (Continuous Compressor Variable Capacity):
•
Compressor will modulate from 100% down to 20%.
• Compressor will not cycle off if thermostat/controller
set-point is reached, and would stay running at the
20% minimum capacity.
• If space temperature drops -2°F below cooling
set-point electric heat Stage 1 will then cycle to
maintain that condition.
• If Stage 2 electric heat is installed, and if required,
will cycle at -4°F below cooling set-point to
maintain that condition.
• If CCVC is terminated the controller will revert to
Cool or Auto operation.
• CCVC would be an Operating Mode for all
applications where continuous run of the
compressor is a requirement.
Testing and Troubleshooting Mode CCFC (Continuous
Compressor Fixed Capacity):
• This unit must be controlled with the digital
thermostat controller supplied with the unit. To test
or troubleshoot, change system mode to CCFC. This
will ensure unit runs continuously and in full capacity
mode. AHRI ratings are based on this mode of
operation.
CCFC (Continuous Compressor Fixed Capacity):
• The compressor is turned ON and locked ON as long
as the thermostat/controller is in Test Mode 2.
• When in CCFC the compressor does not modulate
but will be locked ON at 100% capacity.
• If space temperature drops -2°F below cooling
set-point electric heat Stage 1 will then cycle to
maintain that condition.
• If Stage 2 electric heat is installed, and if required,
will cycle at -4°F below cooling set-point to
maintain that condition.
• If CCFC is terminated the controller will revert to
Cool or Auto operation.
Indoor Blower Operation
The indoor blower speed will modulate with the
compressor operation from 50% to 100% of operation.
Once compressor operation is at 50 or below, percent
airflow will be at 50% and no further reduction of
airflow will occur. Modulation is accomplished by
modulating a 0-10 volt signal from OUT 7 to the indoor
blower motor.
An additional option to maintain airflow at 100% is
also available. This selection is done at the thermostat/
controller under Fan Modes. Default is No for “Always
100%”setting. Change to Yes to disable indoor blower
modulation as described above.
Outdoor Fan Motor Operation
The outdoor fan motor speed is varied in response to
outdoor air temperature and pressure. The fan motor
will cycle on and off with the compressor when not
in a CCVC or CCFC mode. At all times above 122°F
OAT, the outdoor fan, OUT 9, will be energized at high
speed. From 122°F to 55°F the outdoor fan, OUT
9, will be set at normal outdoor airflow. Below 55°F
the outdoor fan will modulate to maintain a 300 psi
head pressure. This will act as a low ambient fan
cycling control. The output may go to zero output to
maintain the 300 PSI. The outdoor ECM motor will be
programmed with a minimum RPM allowed to protect
the bearing system. Any signal that is less than the
percent torque required to maintain the minimum RPM
will cause the motor to shut off. Once head pressure
rises the motor will restart.
These functions are regulated by the digital thermostat/
controller with input from the pressure transducer and
output signal to the Fan Motor.
Capacity Modulation and High Head Pressure Control
The pressure transducer monitors the high side
pressure providing input to the digital thermostat/
controller. It is powered using a 5VDC power supply
with a digital relay signaling the compressor unloader
solenoid as required. When the ECU head pressure
exceeds 615 PSI based on outdoor and indoor ambient
conditions the compressor will automatically start to
reduce capacity to stay online keeping the pressure at
or below 575 PSI. The thermostat/controller display
alternates between OD temperature and discharge
pressure. When compressor capacity is being reduced
due to high pressure conditions it will also indicate
“High Head Pressure Control” mode on the display. A
separate 650 PSI high pressure cutout switch is also
employed as additional safety device. See Compressor
Control Module on following page for more details.

Manual 2100-615A
Page 18 of 24
Control
Device Normal Abnormal
5VDC
Power
Supply
Red LED lit when 24VAC
present. 5VDC present at
solid Red and solid Black
wires. Both jumpers on Half.
3A 250V fuse.
Red LED not lit. 5VDC not
present at solid Red and
solid Black wires.
Both jumpers on Half.
Check 3A fuse.
COOLING SEQUENCE
Compressor Operation
The cooling capacity of the WV series is controlled
by loading or unloading the compressor. On a call
for cooling, the unloader solenoid is energized for
one second to ensure pressure equalization in the
compressor. The compressor contactor, RLY 2, is
then energized and the compressor will start. A
PI control loop then calculates the compressor
capacity needed to reach set point and modulates the
compressor. Modulation range is from 20% to 100%
capacity. Modulation is accomplished by a pulse width
modulated signal from OUT 8 which energizes the solid
state relay (SSR) and energizes or de-energizes the
unloader solenoid. The required compressor capacity
is calculated every 15 seconds.
20% load means 0 VDC for 3.0 seconds and 5 VDC for
12.0 seconds from OUT 8.
30% load means 0 VDC for 4.5 seconds and 5 VDC for
10.5 seconds from OUT 8.
40% load means 0 VDC for 6.0 seconds and 5 VDC for
9.0 seconds from OUT 8.
50% load means 0 VDC for 7.5 seconds and 5 VDC for
7.5 seconds from OUT 8.
60% load means 0 VDC for 9.0 seconds and 5 VDC for
6.0 seconds from OUT 8.
70% load means 0 VDC for 10.5 seconds and 5 VDC
for 4.5 seconds from OUT 8.
80% load means 0 VDC for 12.0 seconds and 5 VDC
for 3.0 seconds from OUT 8.
90% load means 0 VDC for 13.5 seconds and 5 VDC
for 1.5 seconds from OUT 8.
100% load means 0 VDC for 15 seconds and 5 VDC for
0.0 seconds from OUT 8.
Outdoor Temperature Sensor
A sensor probe projects out the bottom of the ECU
control box into the outdoor section, and this provides
input for the outdoor fan sequences below 55°F and
above 115°F described under Outdoor Fan Motor
Operation.
Discharge Temperature Sensor
This sensor is mounted on the compressor discharge
line and protects the compressor against overheating.
It opens at 250°F and closes at 200°F.
HEATING SEQUENCE
On a call for heating, if the space temperature falls 1°F
below setpoint, the first stage of heating, RLY 4, will
cycle ON. If the space temperature falls 3°F below
setpoint, the second stage of heating, RLY 5, will cycle
ON. Indoor Blower airflow is maintained at the Rated
unit airflow at all times during heating.
LEAD/LAG SEQUENCE
The digital controllers can be used for dual units used
in a redundant application by using the scheduling
function as follows:
1. The controllers should be mounted side by side so
they are in the same temperature zone.
2.
The time setting on both controllers need to be
synchronized to the same time of day. NOTE: there
is a 72-hour time retention if power is removed. If
power off-time exceeds 72 hours, the time clock
in each device must be reset to match. The exact
time is not important as long as both controllers are
set the same unless it is critical to control the time
of day when the units swap operating positions.
3. Set one controller #1 to be Occupied for a 12-
hour period and Unoccupied for the other 12-hour
period. Set controller #2 so that it is exactly the
opposite. Unoccupied for the 12-hour period
when #1 is Occupied and Occupied when #1 is
Unoccupied.
4. Set Occupied cooling setpoint the same for each
controller, and Unoccupied the same for each. 4°F
difference is suggested.
5. Set controllers to “Auto” mode of operation.
Example:
1. Both Unit #1 and #2 have Occupied setpoint
of 74°F and Unoccupied setpoint of 78°F
2. Unit #1 set for Occupied from 1:00 a.m. to
1:00 p.m. & Unoccupied from 1:00 p.m. to
1:00 a.m.
3. Unit #2 set for Unoccupied from 1:00 a.m. to
1:00 p.m. & Occupied from 1:00 p.m. to 1:00
a.m.
4. Every 12 hours the units will swap position
as being the lead unit, and the lag unit is
available for back up operation at the higher
temperature should the situation ever arise.