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INSTALLATION INSTRUCTIONS
PACKAGED AIR CONDITIONER
Q24A2DA
Q30A2DA
Q24A2DB
Q30A2DB
Q24A2DC
Q30A2DC
Q-TEC
TM
Models:
Q36A2DA
Q36A2DB
Q36A2DC
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com
SERIES
Q42A2DA
Q48A2DA
Q42A2DB
Q48A2DB
Q42A2DC
Q48A2DC
Manual No.:
Supersedes: 2100-602
Date:
Q60A2DA
Q60A2DB
Q60A2DC
2100-602A
7-25-17
Manual
2100-602A
Page
1 of 41
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Troubleshooting
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Summary of Contents for Bard Q24A2DA
- Page 1 Models: Q24A2DA Q30A2DA Q36A2DA Q42A2DA Q48A2DA Q60A2DA Q24A2DB Q30A2DB Q36A2DB Q42A2DB Q48A2DB Q60A2DB Q24A2DC Q30A2DC Q36A2DC Q42A2DC Q48A2DC Q60A2DC Bard Manufacturing Company, Inc. Manual No.: 2100-602A Bryan, Ohio 43506 Supersedes: 2100-602 Date: 7-25-17 www.bardhvac.com Manual 2100-602A Page 1 of 41...
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Page 2: Table Of Contents
CONTENTS Getting Other Information and Publications tart Up For more information, contact these publishers: ... 3 R-410A Refrgerant............27 Topping Off System Charge ........... 27 General Information Safety Practices.............. 27 Model Nomenclature .......... 4 Description of Standard Equipment ........ 28 Shipping Damage ............ -
Page 3: Getting Other Information And Publications
GETTING OTHER INFORMATION AND PUBLICATIONS These publications can help you install the air FOR MORE INFORMATION, CONTACT conditioner or heat pump. You can usually find these THESE PUBLISHERS: at your local library or purchase them directly from the publisher. Be sure to consult current edition of each standard. -
Page 4: Q-T Ec Model Nomenclature
Series General Information MODEL NOMENCLATURE MODEL FILTER OPTIONS NUMBER 0Z - 0KW CONDITIONER X - 1 inch Fiberglass COIL OPTIONS Q-Tec™ INTERNAL 05 - 5KW (Standard) X - Standard CONTROLS 06 - 6KW F - 2 inch Fiberglass REVISION | 1 - Phenolic coated X - Standard CAPACITY... -
Page 5: Table 1 Factory Built-In Electric Heat Table
Manual 2100-602A Page 5 of 41... -
Page 6: Table 2 Electrical Specifications
TABLE 2 ELECTRICAL SPECIFICATIONS Single Circuit Dual Circuit Minimum j Maximum Rated Field Circuit External Fuse Field Power Ground Maximum Field MODEL Volts & Minimum Power External Power Ground Ampacity or Ckt. Breaker Wire Size Wire Size Phase Circuit... -
Page 7: Figure 1 Unit Dimensions
Manual 2100-602A Page 7 of 41... -
Page 8: Shipping Damage
SHIPPING DAMAGE FIGURE 2 AIR SEAL UNDER QT UNIT 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. -
Page 9: Handling Unit After Removal From Skid
HANDLING UNIT AFTER REMOVAL The blade of the appliance cart should be slid under the wheels of the unit. The strap of the appliance cart FROM SKID should be placed around the unit and strapped tightly. WARNING 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. -
Page 10: Figure 5 Installation With Free Blow Plenum
FIGURE 5 INSTALLATION WITH FREE BLOW PLENUM FIGURE 6 DUCTED APPLICATION Manual 2100-602A Page 10 of 41... -
Page 11: Duct Work
DUCT WORK When used with a ducted supply, a QCX Cabinet Extension can be used to conceal the duct work above All duct work must be properly sized for the design the unit to the ceiling. This extends 20" above the airflow requirement of the equipment. -
Page 12: Fresh Air Intake
This fresh air assembly is located in the rear of the unit Optional Rear Drain Kit, Bard Model QCDS48A, and to gain access to make these adjustments remove is also available for these products. The optional the air filter service door. -
Page 13: Figure 9 Optional Side Drain
FIGURE 9 OPTIONAL SIDE DRAIN (SIDE VIEW) INSTALLATION UNIT FIGURE 10 FIGURE 11 STANDARD REAR DRAIN REAR DRAIN (TOP VIEW) DRAIN LINE WALL (MAXIMUM 10" FOR REAR DRAIN) SLEEVE COUPLINGS NOT SHOWN BUT RECOMMENDED FOR EASE OF REMOVABILITY FOR SERVICE. WALL BRACKET WATER... -
Page 14: Figure 12A Optional Rear Drain Kit
Manual 2100-602A Page 14 of 41... -
Page 15: Figure 12B Optional Rear Drain Kit
FIGURE 12B PLUG INSTALLED IN SIDE Q/Tec DRAIN REAR DRAIN CONNECTION IN Q/Tec PRODUCT IMPORTANT ! 1/2" SLIP X 1/2" SLIP X 3/4" NPT TEE SUPPLIED WITH DRAIN BOX KIT 3/4" PLASTIC PIPE NIPPLE (TIGHTEN THREADS SO TEE IS SUPPLIED WITH DRAIN BOX KIT HORIZONTAL TO FLOOR) (APPLY TEFLON TAPE TO THREADS) -
Page 16: Figure 12C Optional Rear Drain Kit
FIGURE 12C REMOVE KNOCK-OUT FOR INDOOR DRAIN HOSE CONNECTOR (If Used) MIS-2471 Manual 2100-602A Page 16 of 41... -
Page 17: Figure 12D Optional Rear Drain Kit
FIGURE 12D DRAIN HOSE FROM INDOOR DRAIN PAN. MOVE HOSE FROM ATTACHMENT IN LOWER DRAIN PAN AND SLIDE ONTO DRAIN BOX BARB FITTING, SECURING WITH SUPPLIED CLAMP IF OUTDOOR PAN IS BYPASSED. ( WILL REDUCE RISK OF ALGAE GROWTH IN THE OUTDOOR PAN BUT AT A SLIGHT COOLING PERFORMANCE REDUCTION OF 2-3% ) MIS-2472... -
Page 18: Figure 13A Unit Mounting
FIGURE 13A UNIT MOUNTING SIDE TRIM (2 PCS.) ENLARGED VIEW OF MOUNTING BRACKET SHOWING SLEEVE TO CABINET ATTACHMENT SIDE TRIM (2 PCS.) MOUNTING BRACKET WALL SLEEVE #8 SCREW PROVIDED (LIGHT COLOR) MOUNTING BRACKET CABINET SIDE PANEL #10 HEX HEAD SCREW BOTTOM PROVIDED TRIM PIECE... -
Page 19: Installation Instructions
INSTALLATION INSTRUCTIONS MOUNTING THE UNIT alignment to the mounting brackets. This unit must be level from side to side. If adjustments When installing a Q-T unit near an interior wall on are necessary, shim up under the rollers with the left side, a minimum of 8 inches is required; 12 sheets of steel or any substance that is not inches is preferred. -
Page 20: Wiring - Main Power
WIRING – MAIN POWER See “Start Up” section for information on three phase scroll compressor start-ups. Refer to the unit rating plate and/or Table 2 for wire The field wiring connections are located behind the sizing information and maximum fuse or “HACR top and hinged panel in the circuit breaker panel. -
Page 21: Low Voltage Connections
The Climate Control Option J is an electronic, LOW VOLTAGE CONNECTIONS programmable thermostat with humidity control and is FOR DDC CONTROL BACnet compatible. The thermostat can be set in the heat, cool or automatic mode. When the thermostat is Fan Only Energize G set in the heat mode, it can heat only to maintain the temperature set on the thermostat. -
Page 22: Figure 16 Thermostat Plug Terminals
TABLE 4 WALL THERMOSTATS Thermostat Predominant Features 8403-067 Carbon Dioxide Sensor with LCD for Sensor Readings 3 stage Cool; 3 stage Heat 8403-060 Programmable/Non-Programmable Electronic (1120-445) HP or Conventional, Auto or Manual changeover 2 stage Cool; 2 stage Heat 8403-081 Programmable/Non-Programmable Electronic (VT8650U5500B) HP or Conventional, Auto or Manual changeover... -
Page 23: Figure 17 Thermostat Wiring Diagram "X" Option
FIGURE 17 REMOTE THERMOSTAT WIRING DIAGRAM "X" Thermostat Options “X” THERMOSTAT OPTION 8403-047 Low Voltage H200 Term. Block Plug #4 Humidistat Class 2 Blue Red/White Purple/White D/YO Brown/White Orange Yellow Blue W1/E Brown Red/White Black/White 8403-060 Thermostat Black/White 8403-058 8403-081 TH5220D1151 Thermostat Thermostat... -
Page 24: Figure 18 Thermostat Wiring Diagram "E" Option
FIGURE 18 UNIT MOUNTED THERMOSTAT WIRING DIAGRAM “E” THERMOSTAT OPTION "E" Thermostat Option Plug #2 Temp. and Humidity Controller PART #8403-060 Purple/White D/YO Brown/White Orange Yellow Blue W1/E Brown Red/White Black/White 4102-074 Manual 2100-602A Page 24 of 41... -
Page 25: Figure 19 T-Stat Wiring Diagram " I " Option
FIGURE 19 UNIT MOUNTED THERMOSTAT WIRING DIAGRAM “ I ” THERMOSTAT OPTION "I" Thermostat Option CO Controller Bard Part #8403-067 Red/White 24 VAC Analog Plug #2 Purple/White D/Y0 Brown/White Orange Temp. and Humidity Controller Yellow Part #8403-060 Blue W1/E Brown... -
Page 26: Figure 20 T-Stat Wiring Diagram "J Or K" Opt
FIGURE 20 UNIT MOUNTED THERMOSTAT WIRING DIAGRAM J" Or "K" Thermostat Option “J” OR “K” THERMOSTAT OPTION Plug #2 Temp. and Humidity Controller "J" CS9BE-THO "K" CS9BE-THOC Purple/White Brown/White Orange Yellow Blue W1/E Brown Red/White Black/White 4102-077 Manual 2100-602A Page 26 of 41... -
Page 27: Start Up
8. Store cylinders in a cool area, out of direct TOPPING OFF SYSTEM CHARGE sunlight. If a leak has occurred in the system, Bard 9. Never heat cylinders above 125°F. Manufacturing recommends reclaiming, evacuating 10. Never trap liquid R-410A in manifold sets, gauge (see criteria above), and charging to the nameplate lines or cylinders. -
Page 28: Description Of Standard Equipment
START UP CAUTION DESCRIPTION OF STANDARD EQUIPMENT Do not plug in or unplug blower motor High Pressure Switch connectors while the power is on. Provides refrigerant circuit high pressure protection. Failure to do so may result in motor failure. Includes lockout circuit that is resettable from room thermostat. -
Page 29: Compressor Control Module
Alarm Relay Output All three phase scroll compressors used in the Q-T series are wired identically internally. As a result, once Alarm terminal is output connection for applications the correct phasing is determined for a specific system where alarm relay is employed. This terminal is or installation, connecting properly phased power powered whenever compressor is locked out due to leads to the same Fusite terminal should maintain... -
Page 30: Mist Eliminator Service
6. Some service requires the need to remove the The mist eliminator can be serviced from the outside unit from the wall including replacement of by using a vacuum cleaner. The outdoor grille must be the indoor coil and/or the outdoor coil. Also removed. - Page 31 3. Underneath the heat recovery cassette there is a ENERGY RECOVERY VENTILATOR (Option) power connector for the lower blower assembly. To disconnect this plug, the tabs on both sides of the Before starting, make sure that the power has been plug must be squeezed to release the plug.
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Page 32: Figure 21 Fresh Air Damper Removal
FIGURE 21 FRESH AIR DAMPER REMOVAL MOUNTING SCREW Manual 2100-602A Page 32 of 41... -
Page 33: Figure 22 Qerv Removal
FIGURE 22 QERV REMOVAL POWER CONNECTORS MOUNTING SCREWS LOWER BLOWER ASSEMBLY POWER CONNECTOR FRONT FILL Manual 2100-602A Page 33 of 41... -
Page 34: Figure 23 Co Controller
SEQUENCE OF OPERATION Reheat Circuit – There is a small capillary tube inserted between the reheat coil return line and suction Cooling – Circuit R-Y makes the thermostat pull in line that will prevent liquid from accumulating in the the compressor contactor starting the compressor reheat coil when it is inactive. -
Page 35: Figure 24 Air Conditioning Mode Circuit Diagram
FIGURE 24 AIR CONDITIONING MODE CIRCUIT DIAGRAM Manual 2100-602A Page 35 of 41... -
Page 36: Figure 25 Dehumidification Mode Circuit Diagram
FIGURE 25 DEHUMIDIFICATION MODE CIRCUIT DIAGRAM Manual 2100-602A Page 36 of 41... -
Page 37: Troubleshooting
TROUBLESHOOTING TABLE 5A TROUBLESHOOTING Sympton Possible Cause What to Check How to Check or Repair Check for R connection at unit, Control circuit wiring Run R connection to outdoor units and 24V between R-C. Check for 24V between If no voltage between L1-C turn ther- L1-C on heat pump control. -
Page 38: Troubleshooting Ecm™ Blower Motors
TROUBLESHOOTING ECM MOTORS ™ CAUTION: Symptom Cause/Procedure • Noisy blower or cabinet • Check for loose blower housing, panels, etc. Disconnect power from unit before removing or replacing • High static creating high blower speed? connectors, or servicing motor. To avoid electric shock from - Check for air whistling through seams in the motor’s capacitors, disconnect power and wait at least 5 ducts, cabinets or panels... -
Page 39: Figure 26 Control Disassembly
TROUBLESHOOTING GE ECM ™ MOTORS CONT’D. TROUBLESHOOTING ECM MOTORS CONT’D. ™ 8b. IF REPLACING AN ECM 2.3 CONTROL WITH AN ECM 2.3 Replacing ECM Control Module CONTROL, the plastic tab and shorter through-bolts are not needed. The Replacing ECM Control Module To replace the control module for the GE variable-speed indoor blower 8b. -
Page 40: Fan Blade Setting Dimensions
R-410A FAN BLADE SETTING DIMENSIONS Any service work requiring removal or adjustment REFRIGERANT CHARGE in the fan and/or motor area will require that the dimensions in Table 6 be checked and blade adjusted in This unit was charged at the factory with the quantity of or out of the motor shaft accordingly. -
Page 41: Pressure Chart
TABLE 9 COOLING PRESSURE (ALL TEMPERATURES IN DEGREES F) RETURN COOLING MODEL 75° 80° 85° 90° 95° 100° 105° 110° 115° CAPACITY TEMP. 75 DB Total Cooling 25,700 24,600 23,600 22,700 21,800 21,100 20,300 19,600 19,100 62 WB Sensible Cooling 18,800 18,600 18,300...
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