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Manual 2100-769A 

Page 

30 of 50

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 1 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 an extended period of time, the 

compressor’s internal protector will 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 three phase line monitor to prevent 
compressor damage due to phase reversal.
The phase monitor in this unit is equipped with two 
LEDs. If the Y signal (call for cooling) is present at the 
phase monitor and phases are correct, the green LED 
will light.

NOTE:

 The phase monitor will not show phase reversal 

until the compressor is energized during a call 

for cooling or heat pump operation.

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.

Condenser Fan Operation

NOTE:

 Certain models may be equipped with a low 

ambient control (LAC), and if so, the condenser 

fan motor will have a delayed start until system 

refrigerant operating pressure builds up. After 

starting, the fan motor may or may not cycle 

depending upon ambient conditions. This is 

normal operation.

Service Hints

1.  Caution owner/operator to maintain clean air filters 

at all times and 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.  Switching to heating cycle at 75°F or higher 

outside temperature may cause a nuisance trip 
of the remote reset high pressure switch. Turn 
thermostat off, then on to reset the high pressure 
switch.

3.  Heat pump wall thermostats perform multiple 

functions. Be sure that all function switches are 
correctly set for the desired operating mode before 
trying to diagnose any reported service problems.

4.  Check all power fuses or circuit breakers to be sure 

they are the correct rating.

5.  Periodic cleaning of the outdoor coil to permit full 

and unrestricted airflow circulation is essential

.

6.  Annual maintenance is required to make sure that 

all of the systems are functioning properly.

 

a.  Check to make sure that the drains are not 

obstructed in any way.

 

b.  Remove any debris in the condenser section of 

the unit.

 

c.  Inspect and wash outdoor coils as necessary.

7.  All motors are sealed and require no oiling.

Sequence of Operation

Cooling Stage 1

Circuit R-Y1 makes at thermostat pulling in compressor 
contactor, starting the compressor and outdoor motor. 
(See 

NOTE

 under 

Condenser Fan Operation

 

concerning models equipped with low ambient control.) 
The G (indoor motor) circuit is automatically completed 
by the thermostat on any call for cooling operation or 
can be energized by manual fan switch on subbase for 
constant air circulation. 

Cooling Stage 2

Circuit R-Y1 & Y2 makes at the thermostat energizing 
the 2nd stage solenoid in the compressor. The default 
position of the compressor staging solenoid is non-
energized. The compressor will run at low capacity until 
this solenoid is energized.

Heating Stage 1

A 24V solenoid coil on reversing valve controls heating 
cycle operation. Two thermostat options, one allowing 
“Auto” changeover from cycle to cycle and the other 
constantly energizing solenoid coil during heating 
season and thus eliminating pressure equalization 
noise except during defrost, are to be used. On “Auto” 
option, a circuit is completed from R-B and  R-Y1 on 

Содержание CH Series

Страница 1: ...mp Models INSTALLATION INSTRUCTIONS C36HY A C36HY B C36HY C C42HY A C42HY B C42HY C Bard Manufacturing Company Inc Bryan Ohio 43506 www bardhvac com Manual 2100 769A Supersedes 2100 769 Date 6 21 23 C...

Страница 2: ...ation 32 High Pressure Switch Operation 33 Vent Connection Plug 33 Pressure Service Ports 33 Service 34 Solid State Heat Pump Control Troubleshooting Procedure 34 Checking Temperature Sensor Outside U...

Страница 3: ...Temperature vs Resistance 35 Table 10 Fan Blade Dimensions 39 Table 11A Cooling Pressures Full Load 40 Table 11B Cooling Pressures Part Load 41 Table 12A Heating Pressures Full Load 42 Table 12B Heati...

Страница 4: ...ituation which if not avoided will result in death or serious injury The signal word DANGER is to be limited to the most extreme situations DANGER signs should not be used for property damage hazards...

Страница 5: ...to avoid accidental contact with sharp edges Failure to do so can result in personal injury CAUTION The following symbols are displayed on units This symbol indicates that the Operation Manual should...

Страница 6: ...he 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 a...

Страница 7: ...xtreme damage hazards o involved ed could result in d for property his level is also d could result in lert symbol may be erty damage only ted to personal nal word As an ty alert symbol may mmediate h...

Страница 8: ...ns sont disponibles telles que le manuel d utilisation ou le manuel d installation Risque de choc lectrique Ces t ches doivent tre r alis es par une personne parfaitement qualifi e et form e Le non re...

Страница 9: ...ciation for the Installation of Air Conditioning and Ventilating Systems of Other Than Residence Type NFPA No 90A et aux Syst mes de chauffage et de climatisation d air chaud de type r sidence NFPA No...

Страница 10: ...ntact 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...

Страница 11: ...ergy Recovery Ventilator V Commercial Room Ventilator Modulating Y Full Flow Economizer Temperature Z Full Flow Economizer Enthalpy ELECTRIC HEAT 00 0Kw with Lug Connection 0Z 0Kw with Circuit Breaker...

Страница 12: ...require a 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 Any grille...

Страница 13: ...Install Screws and Bend Tabs Up FIGURE 3 Removing Second Filter Upper slots for 1 filters Lower slots for 2 filters 3 Reverse the order for new filter installation NOTE When installing new filters mak...

Страница 14: ...is an adjustable slide on the side of the fresh air intake that can be adjusted to limit how far the damper opens so that the amount of fresh air that enters the structure is regulated Graphs found o...

Страница 15: ...er section of the unit and outdoor ambient temperature air must be able to enter from the front through the condenser grill of the unit Portable or modular building placement must be in a way that the...

Страница 16: ...ications The spacing between louvers on the grille shall not be larger than 5 8 It is recommended that a Bard Return Air Grille Kit is installed that is designed specifically for the wall mount produc...

Страница 17: ...installation but is not required Review all requirements listed on unit labels and on serial plate located on the side of the unit 2 Locate and mark bolt hole locations and bottom mounting bracket loc...

Страница 18: ...2HY C48HY C60HY 20 20 10 TABLE 2 Minimum Clearances Required to Combustible Materials Model Supply Air Duct 1st 3 Cabinet C36HY C42HY C48HY C60HY 1 4 0 FIGURE 12 Vent Installation Removal Clearance Re...

Страница 19: ...Rain Hood Built In Low Voltage Recessed front cover J 1 375 A C I K D H 2 250 3 000 Mounting Side Wall Brackets Built In Location Shipping Flashing Top Rain DO NOT PLACE ELECTRICAL ENTRANCES IN SHADE...

Страница 20: ...and Hole Location View Supply Opening Return Opening UNITS REQUIRED DIMESIONS A B C D E F G C36HY C42HY UNITS REQUIRED DIMESIONS TO MAINTAIN 1 4 MIN CLEARANCE FROM COMBUSTIBLE MATERIALS 30 1 2 10 1 2...

Страница 21: ...l Supply Air Duct Duct Typical Building Wall Frame Note Side section view of supply air duct for wall mounted unit showing 1 4 clearance to combustible surfaces Fire hazard Maintain minimum 1 4 cleara...

Страница 22: ...CLEARANCE STRUCTURAL STEEL ALL AROUND DUCT THIS STRUCTURAL MEMBER LOCATED TO MATCH STUD SPACING FOR REST OF WALL A SECOND MEMBER MAY BE REQUIRED FOR SOME WALLS RETURN DUCT MIS 3982 B See Figure 14 Mo...

Страница 23: ...best unit performance and efficiency Review duct grille or return duct work Avoid using restrictive duct work to Unit Mount Return Grille Fixed Blade Wall wall Outside Wall Ducted Installations Adjus...

Страница 24: ...stallation If field power is supplied to the left side of the unit run the high voltage wires under the shield shown in Figure 19 and to the right of the wire shield next to the compressor contactor a...

Страница 25: ...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...

Страница 26: ...Electronic HP or Conventional Auto or Manual Changeover with Humidity and Occupancy Sensor BACnet Thermostat option only permissable for units up to 12KW electric heat 8403 083 2 Stage Cool 2 Stage H...

Страница 27: ...ration add jumper if optional CO2 controller is not used Vent will run while blower is energized For ECON CRV V an additional wire change is required See install manual 4 Factory installed jumper Remo...

Страница 28: ...ly See vent installation manual 6 For vent operation add jumper if optional CO2 controller is not used Vent will run while blower is energized For ECON CRV V an additional wire change is required See...

Страница 29: ...410A refrigerant it must come out of the charging cylinder tank as a liquid to avoid any fractionation and to ensure optimal system performance Refer to instructions for the cylinder that is being ut...

Страница 30: ...nser fan motor will have a delayed start until system refrigerant operating pressure builds up After starting the fan motor may or may not cycle depending upon ambient conditions This is normal operat...

Страница 31: ...efrost mode Factory default setting is 60 minutes During the defrost mode the refrigerant cycle switches back to the cooling cycle the outdoor motor stops electric heaters are energized and hot gas pa...

Страница 32: ...cian to override or speed up this timing period and shorting out the SPEEDUP terminals for a few seconds can do this Low Pressure Switch Bypass Operation The control has a selectable SW1 low pressure...

Страница 33: ...plied jumper plug is in place The unit will not operate without anything plugged in This plug is located on the side of the control panel behind the front vent door behind the filter access door If th...

Страница 34: ...rmer is bad or the unit wiring is incorrect 10 Check for Compressor output signal Is there 24 volts AC between CC C Yes go to Step 12 No go to Step 13 11 No Y compressor input signal Check thermostat...

Страница 35: ...6 0 144374 22 0 43554 60 0 15310 98 0 6098 15 0 139576 23 0 42295 61 0 14921 99 0 5961 14 0 134956 24 0 41077 62 0 14544 100 0 5827 13 0 130506 25 0 39898 63 0 14177 101 0 5697 12 0 126219 26 0 38757...

Страница 36: ...ontrol replacement check Perform Moisture Check Motor won t start Motor rocks but won t start Check for loose or compliant motor mount Make sure blower wheel is tight on shaft Perform motor control re...

Страница 37: ...motor plug just removed to the motor shell is 100K ohms see Figure 24 Measure to unpainted motor end plate If any motor lead fails this test do not proceed to install the control module the motor is d...

Страница 38: ...ways Energized Pin 2 X Pin 3 24 VAC C Common Signal Always Energized Pin 4 Not Used Pin 5 Not Used Pin 6 X X X X X Pin 7 Not Used Pin 8 Not Used Pin 9 X X X Pin 10 X X Pin 11 Not Used Pin 12 24 VAC Ho...

Страница 39: ...ndenser coil as thoroughly as needed 5 Reverse steps to re install Important Cleaning Note For improved start up performance wash the indoor coil with dishwasher detergent IMPORTANT Please be aware of...

Страница 40: ...e 147 148 149 151 152 153 154 155 157 158 160 Head Pressure 318 342 367 394 421 449 479 509 541 573 607 C42HY 75 62 Suction Pressure 134 134 134 135 136 137 138 139 140 142 143 Head Pressure 314 333 3...

Страница 41: ...e 152 154 155 156 157 159 160 162 163 165 166 Head Pressure 251 290 311 334 358 382 408 436 464 493 524 C42HY 75 62 Suction Pressure 137 137 137 137 138 139 140 141 143 145 147 Head Pressure 241 279 2...

Страница 42: ...44 50 56 62 69 76 83 90 98 106 115 124 133 Head Pressure 273 285 296 308 319 331 342 353 364 376 387 398 409 420 TABLE 12B Heating Pressures Part Load Air Temperature Entering Outdoor Coil F Model Re...

Страница 43: ...C09 C15 460 60 3 1 1 1 1 17 25 31 31 20 25 35 35 These Minimum Circuit Ampacity values are to be used for sizing the field power conductors Refer to the National Electrical code latest version Article...

Страница 44: ...or to prevent short circuiting The 10 reduction will only be adjusted when unit is running in cooling mode In heating mode the blower will remain at rated airflow Dirty Filter Switch 1 Disconnect all...

Страница 45: ...ps and the light comes on If the filter is restricted by 75 or desired restriction amount skip to Step 6 4 If switch setting adjustment is required disconnect power to the unit Remove the upper front...

Страница 46: ...8V units only Model Rated ESP Maximum ESP Blower Only Cooling Heating 1st Stage CFM Cooling Heating 2nd Stage CFM Electric Heat C36HY 0 15 0 50 800 800 1100 1100 C42HY 0 15 0 50 800 900 1300 1300 C48H...

Страница 47: ...FAD NE5 Fresh Air Damper No Exhaust X X FAD BE5 Fresh Air Damper Barometric Exhaust X X CRV F5 Commercial Ventilator On Off Spring Return X X CRV V5 Commercial Ventilator 0 10V Spring Return X X ECON...

Страница 48: ...H042A A05 X EHCH042A A10 X EHCH042A B05 X EHCH042A B09 X EHCH042A B15 X EHCH048A A05 X EHCH048A A10 X EHCH048A A15 X EHCH048A B05 X EHCH048A B09 X EHCH048A B15 X EHCH048A C05 X EHCH048A C09 X EHCH048A...

Страница 49: ...Manual 2100 769A Page 49 of 50 GRAPH 1 CH FAD NE5 Without Exhaust Ventilation Delivery GRAPH 2 CH FAD BE5 With Exhaust Ventilation Delivery...

Страница 50: ...Manual 2100 769A Page 50 of 50 GRAPH 3 C36H C42H CRV FS Ventilation Delivery GRAPH 4 CC48H C60H CRV FS Ventilation Delivery...

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