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Manual 2100-715B 

Page 

13 of 25

Wiring – Main Power

Main electrical power must be supplied to the unit 
from a clean, reliable power source. Verify voltage being 
supplied to the unit is consistent during all times of the 
day and within the range specified for the unit in the 
unit specifications and on the unit serial plate. Voltage 
must be measured at the field power connection point 
in the unit and while the unit is operating at full load 
(maximum amperage operating condition).
Refer to the unit serial plate and unit specifications 
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 on the serial plate, in the unit 
specifications and also in Table 8 on page 23 list 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 type 
and size must be used for proper circuit protection and 
also to ensure that there will be no nuisance tripping 
due to the momentary high starting current of the 
compressor motor.

Wiring – Low Voltage 

All 230/208V 1 phase and 3 phase equipment have 
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:
Tap: 240

 

Range: 253 – 216

Tap: 208 

Range: 220 – 187

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).

For low voltage wiring, an 18 gauge copper, color-coded 
cable is recommended. See Table 4 on page 14 for 
more information.

Low Voltage (24VAC) Connections

These units use a 24-volt AC low voltage circuit.

C

 terminal is the

 24VAC common and is grounded.

G

 terminal is the 

indoor blower input

.

Y1

 terminal is the 

1st Stage input for cooling.

Y2

 terminal is the 

2nd Stage compressor input for cooling 

(if equipped with an economizer) or 

Y2 disables Balanced 

Climate mode if the Y1-Y2 jumper is removed

 

B/W1

 terminal is the 

1st stage electric heat

.

A

 terminal is the 

ventilation input

. This terminal 

energizes any factory-installed ventilation option and 
indoor blower.

L

 terminal is

 

24 volt alarm active output

.

For units equipped with an alarm relay:

1 terminal

 is the 

normally closed contact on the relay.

2 terminal 

is the 

normally open contact on the relay.

3 terminal

 is the 

common contact on the relay.

Unit Shutdown Feature (Standard on All Models)

The RT terminal is the 24VAC transformer output, 
and the R terminal is the 24VAC hot terminal for the 
operation of the equipment. RT and R are connected 
with a brass jumper bar which can be removed and RT 
and R connected to an external NC (normally closed) 
contact such as a fire/smoke detector that will cause 
shutdown of the equipment upon activation.

Balanced Climate™ Feature (Standard on All Models)

All units are equipped with the capability of running 
in Balanced Climate mode. This mode is designed to 
enhance the comfort level by reducing the indoor airflow 
amount and extending the run time to help extract more 
humidity during cooling operation. The Y1 terminal 
is the 24VAC input for Balanced Climate compressor 
cooling operation. The Y2 terminal is the 24VAC input 
for compressor cooling standard operation. Y1 and Y2 
are connected with a brass jumper bar which can be 
removed to enable Balanced Climate mode. Units with 
an economizer will not have the brass jumper installed. 
Refer to vent manuals for instructions on how Balanced 
Climate works with each vent. 

To operate in Balanced Climate mode, a 2-stage 
cooling thermostat is required. The lower indoor airflow 
operation is overridden by utilizing a 2-stage thermostat. 
If the call for cooling is not satisfied within a given 
time frame or temperature differential (specified by 
the thermostat), the thermostat will send a signal to 
Y2 which then increases the blower speed back to the 
selected speed. See pages 24 – 25 for blower speed 
selection options. 

Refer to page 18 for additional Balanced Climate 

requirements and limitations.

Summary of Contents for 11EER WA Series

Page 1: ...11EER WA SERIES WALL MOUNT AIR CONDITIONER Models INSTALLATION INSTRUCTIONS W12AB A W12AB D Bard Manufacturing Company Inc Bryan Ohio 43506 www bardhvac com Manual 2100 715B Supersedes 2100 715A Date 2 24 20 W12AB K ...

Page 2: ... Short Cycle Delay on Break 18 Low Pressure Detection 18 High Pressure Detection 19 Test Mode 19 Brownout Protection with Adjustment 19 Pressure Service Ports 20 Service 21 Fan Blade Setting Dimensions 21 R 410A Refrigerant Charge 21 Setting Unit Airflow 24 Blower Speeds 24 Speed Tap 1 Balanced Climate 24 Speed Tap 2 Default Cooling Heating 24 Speed Tap 3 Optional HI Cooling Heating 24 FIGURES Fig...

Page 3: ...g ACCA Manual J Residential Duct Design for Residential Winter and Summer Air Conditioning and Equipment Selection ACCA Manual D For more information contact these publishers ACCA Air Conditioning Contractors of America 1712 New Hampshire Ave N W Washington DC 20009 Telephone 202 483 9370 Fax 202 234 4721 ANSI American National Standards Institute 11 West Street 13th Floor New York NY 10036 Teleph...

Page 4: ...nd 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 accord...

Page 5: ...n codes may limit this cabinet to installation only in a single story structure Filters A 1 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 service door A 2 pleated filters is also available as an optional accessory The internal filter brackets are adjustable to accommodate the 2 filt...

Page 6: ... drainage A clear flexible PVC drain hose 3 4 ID 1 OD extends from the drain pan in the upper section of the unit and extends down to the unit base An opening is supplied towards the back of the unit base for the drain hose to pass through and the hose extends 1 to 2 below the unit base Water removed from the indoor air condensate will be expelled from the unit in large amounts during cooling oper...

Page 7: ...e that meets the 5 8 louver criteria and does not cause the unit to exceed the maximum specified external static pressure ESP may be used If using a return air filter grille filters must be of sufficient size to allow a maximum velocity of 400 fpm Filter return air grilles do not filter air being brought into the structure through ventilation options including fresh air dampers ventilators economi...

Page 8: ...m bend into the rear bend of the unit top see Figure 3 3 Apply a liberal amount of caulk on left and right cabinet side wall mount brackets and back of top rain flashing Place unit back surface flush against wall Unit must be level to ensure proper condensate drainage 4 Units are secured to the wall by using field supplied fasteners along each side of the wall mount through the built in wall mount...

Page 9: ...OLTAGE ELECTRICAL ENTRANCE BUILT IN RAIN HOOD 2 PITCH 1 50 48 00 21 88 14 63 CONDENSER AIR OUTLET HEATER FILTER ACCESS AIR VENTILATION CONDENSER AIRFLOW IS BLOW THRU 19 72 3 88 31 06 19 72 20 43 SHIPPING LOCATION ENTRANCE ELECTRICAL OPTIONAL TOP RAIN FLASHING DRAIN HOSE 22 25 25 750 10 00 5 00 5 00 17 00 30 13 32 00 2 50 MIS 3599 ...

Page 10: ...PPLIED FOAM AIR SEAL WALL WALL STRUCTURE MIS 3600 FLANGES AND UNDER TOP FLASHING AT TIME OF INSTALLATION SUPPLY AIR DUCT RETURN AIR NOTE IT IS RECOMMENDED THAT A BEAD OF SILICONE CAULKING BE PLACED BEHIND THE SIDE MOUNTING OPENING WALL OPENING AND HOLE LOCATION VIEW 7 031 19 719 10 000 7 031 17 000 6 969 19 719 5 000 17 000 5 000 2 500 ...

Page 11: ...tions RETURN AIR RETURN AIR OPENING OPENING DUCT SUPPLY AIR OPENING SUPPLY AIR OPENING CONCRETE BLOCK WALL INSTALLATION WOOD FRAME WALL INSTALLATION WALL STRUCTURE MOUNT ON UNIT SIDE VIEW OPENING WOOD OR STEEL SIDING RETURN AIR BEFORE INSTALLATION FACTORY SUPPLIED RAIN FLASHING SUPPLY AIR MIS 3670 ...

Page 12: ...Manual 2100 715B Page 12 of 25 FIGURE 6 Common Wall Mounting Installations ...

Page 13: ...erating condition For low voltage wiring an 18 gauge copper color coded cable is recommended See Table 4 on page 14 for more information Low Voltage 24VAC Connections These units use a 24 volt AC low voltage circuit C terminal is the 24VAC common and is grounded G terminal is the indoor blower input Y1 terminal is the 1st Stage input for cooling Y2 terminal is the 2nd Stage compressor input for co...

Page 14: ...Sensor w dehumidification Motion Sensor w Intelligent Learning Control BACnet compatible CS9B THOC 3 stage Cool 3 stage Heat Programmable Non Programmable HP or Conventional Auto or Manual Changeover Humidity Sensor w dehumidification CO2 Sensor Motion Sensor w Intelligent Learning Control BACnet compatible CS9BE THO 3 stage Cool 3 stage Heat Programmable Non Programmable HP or Conventional Auto o...

Page 15: ...4 1 2 3 If not equipped with a ventilation option to plug in a jumper plug must be installed 2 5 2 Factory installed jumper Remove jumper and connect to N C fire alarm circuit if emergency shutdown required 5 4 control optional for ECON only see vent instruction manuals 0 10 VDC modulating C02 control signal for modulating ventilation 3 periods Must be configured for multi stage for Y1 output to b...

Page 16: ...089 W C Rc Y R G O B to N C fire alarm circuit if emergency shutdown required If not equipped with a ventilation option to plug in a jumper plug must be installed TH311OD1040 8403 057 TH522OD1151 8403 058 5 4 6 7 3 Do not add these wires if setting up for modulating control See note 7 Thermostat will not work with units equipped with economizers 1 5 control Optional for ECON Only See vent installa...

Page 17: ...nk as a liquid to avoid any fractionation and to ensure 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 le...

Page 18: ...ced Climate is not a replacement for a dehumidification hot gas reheat unit for extreme applications but rather an enhancement feature for limited climates and applications Vent Connection Plug All units are equipped with a vent connection plug in the side of the control panel for the different ventilation packages to plug in to If the compressor will not start and there is no Y1 at the compressor...

Page 19: ...g The conditions needed for the unit to enter test mode are as follows POT must start at a time less than or equal to the 40 second mark The POT must then be rapidly rotated to a position greater than or equal to the 280 second mark in less than second Normal operation will resume after power is reset or after the unit has been in test mode for at least 5 minutes Brownout Protection with Adjustmen...

Page 20: ...or units switches from utility power to generator power With slower transfer switches the time delay between the utility power and generator power didn t cause a problem The units lost power shut off and came back on line normally With the introduction of almost instantaneous transfer switches the millisecond long power glitch can be enough that the compressor will start to run backwards In this s...

Page 21: ...eadings this information should only be used by certified technicians as a guide for evaluating proper system performance They shall not be used to adjust charge If charge is in doubt reclaim evacuate and recharge the unit to the serial plate charge A AIRFLOW MIS 1724 Model Dimension A W12AB 2 25 Fan Blade Setting Dimensions Shown in Figure 10 is the correct fan blade setting for proper air delive...

Page 22: ...system evacuated and recharged to serial plate charge weight NOTE Pressure table based on high speed condenser fan operation If condensing pressures appear elevated check condenser fan wiring See Condenser Fan Operation Operating at these conditions would be outside the compressor operating envelope and is not recommended Model Return Air Temp DB WB Pressure 75 80 85 90 95 100 105 110 115 120 125 ...

Page 23: ...duit the conductors must be derated Pay special attention to Note 8 of Table 310 regarding Ampacity Adjustment Factors when more than three current carrying conductors are in a raceway IMPORTANT While this electrical data is presented as a guide it is important to electrically connect properly sized fuses and conductor wires in accordance with the National Electrical Code and all local codes MODEL...

Page 24: ...hermostat or other controlling device Multiple motor speed taps may be energized simultaneously by 24VAC power during different modes of operation The highest number speed tap energized takes priority with 3 being the highest and 1 being the lowest See Table 10 for the corresponding blower speeds with the different modes of operation Speed Tap 1 Balanced Climate Speed tap 1 is set as a lower than ...

Page 25: ... Optional HI Cooling Heating Speed Dry Coil Wet Coil Dry Coil Wet Coil Dry Coil Wet Coil W12AB B W12AB D 0 00 330 325 465 460 545 525 0 10 315 305 450 435 495 470 0 15 305 290 435 420 465 445 0 20 285 270 415 400 440 415 0 25 260 250 395 380 410 390 0 30 375 355 380 360 0 40 315 305 320 305 0 50 245 245 255 245 W12AB K 0 00 335 320 455 450 510 505 0 10 295 280 450 435 525 505 0 15 270 255 435 420 ...

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