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INSTALLATION
INSTRUCTIONS
Q-TEC SERIES
PACKAGED
AIR CONDITIONER
Q24H2D
Q36H2D
Q48H2D
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
Since 1914 . . . Moving ahead, just as planned.
Models:
Q30H2D
Q42H2D
Q60H2D
Manual:
Supersedes:
File:
Date:
2100-603
NEW
Vol II Tab 14
11-05-13
Manual
2100-602
Page
1 of 44
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Table of Contents
Troubleshooting
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Summary of Contents for Bard Q-TEC Q24H2D Series
- Page 1 PACKAGED AIR CONDITIONER INSTALLATION INSTRUCTIONS Models: Q24H2D Q30H2D Q36H2D Q42H2D Q48H2D Q60H2D Bard Manufacturing Company, Inc. Manual: 2100-603 Supersedes: Bryan, Ohio 43506 File: Vol II Tab 14 Since 1914 . . . Moving ahead, just as planned. Date: 11-05-13 Manual...
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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 FOR MORE INFORMATION, CONTACT These publications can help you install the air 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 HEAT FILTER OPTIONS NUMBER 0Z - 0KW PUMP X - 1 inch Fiberglass COIL OPTIONS Q-TEC™ INTERNAL 05 - 5KW (Standard) X - Standard CONTROLS 06 - 6KW REVISION | F - 2 inch Fiberglass 1 - Phenolic coated CAPACITY X - Standard... -
Page 5: Table 2 Electrical Specifications
TABLE 2 — ELECTRICAL SPECIFICATIONS Single Circuit Dual Circuit Minimum Maximum Rated Field Maximum Field Circuit External Fuse Field Power Ground MODEL Volts & Minimum Power Ampacity or Ckt. Breaker Wire Size Wire Size External Power... -
Page 6: Figure 1 Unit Dimensions
Manual 2100-603 Page 6 of 44... -
Page 7: Shipping Damage
SHIPPING DAMAGE FIGURE 2 AIR SEAL UNDER Q-TEC 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 8: 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 9: Figure 5 Installation With Duct Free Plenum
FIGURE 5 INSTALLATION WITH DUCT FREE PLENUM FIGURE 6 DUCTED APPLICATION Manual 2100-603 Page 9 of 44... -
Page 10: Duct Work
DUCT WORK For hot water coil option a QPBHWxx-F for free blow or QPBHWxx-D for ducted airflow is used. Any heat pump is more critical of proper operating When used with a ducted supply, a QCX Cabinet charge and an adequate duct system than a straight air conditioning unit. -
Page 11: Fresh Air Intake
This fresh air assembly is located in the rear of the unit Optional Rear Drain Kit, Bard Model QCDS48A, is also and to gain access to make these adjustments remove available for these products. The optional rear drain kit the air filter service door. -
Page 12: Figure 9 Optional Side Drain
FIGURE 9 FIGURE 10 OPTIONAL SIDE DRAIN (SIDE VIEW) STANDARD REAR DRAIN UNIT FIGURE 11 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 TRAP... -
Page 13: Figure 12A Optional Rear Drain Kit
Manual 2100-603 Page 13 of 44... -
Page 14: 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 15: Figure 12C Optional Rear Drain Kit
FIGURE 12C REMOVE KNOCK-OUT FOR INDOOR DRAIN HOSE CONNECTOR (If Used) MIS-2471 Manual 2100-603 Page 15 of 44... -
Page 16: 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 17: 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 18: 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 19: 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 20: Low Voltage Connections
If the unit is running in heat pump mode and the heaters will turn off and the airflow will be reduced and humidistat calls for dehumidification, the the system will continue to dehumidify until humidistat dehumidification mode takes precedence over the heat is satisfied. -
Page 21: General
CAUTION GENERAL This unit is equipped with a variable speed ECM motor. The motor is designed to maintain rated airflow Do not plug in or unplug blower motor up to the maximum static allowed. It is important connectors while the power is on. that the blower motor plugs are not plugged in or Failure to do so may result in motor failure. -
Page 22: Figure 17 Thermostat Wiring Diagram "X" Option
FIGURE 17 REMOTE THERMOSTAT WIRING DIAGRAM “X” THERMOSTAT OPTION Manual 2100-603 Page 22 of 44... -
Page 23: Figure 18 T-Stat Diagram "X" Opt. & Demand Vent
FIGURE 18 REMOTE THERMOSTAT WIRING DIAGRAM “X” THERMOSTAT OPTION & DEMAND VENTILATION Manual 2100-603 Page 23 of 44... -
Page 24: Figure 19 Thermostat Wiring Diagram "E" Option
Manual 2100-603 Page 24 of 44... -
Page 25: Figure 20 T-Stat Wiring Diagram " I " Option
Wiring Diagram With "I" Thermostat Option FIGURE 20 UNIT MOUNTED THERMOSTAT WIRING DIAGRAM “ I ” THERMOSTAT OPTION CO Controller Bard Part #8403-067 24 VAC Analog Plug #4 8403-060 Thermostat W1/E Red/Yellow D/YO Purple/White Orange Yellow Blue Brown Red/White Black/White... -
Page 26: Figure 21 T-Stat Wiring Diagram "J Or K" Opt
Manual 2100-603 Page 26 of 44... -
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 DESCRIPTION OF STANDARD PHASE MONITOR EQUIPMENT All units with three phase scroll compressors are equipped with a 3 phase line monitor to prevent Solid State Electronic Heat Pump Control compressor damage due to phase reversal. Provides efficient 30-minute defrost cycle. A thermistor sensor and speed up terminal for service along with The phase monitor in this unit is equipped with two a 10- minute defrost override are standard on the... -
Page 29: Service Hints
SERVICE HINTS 7. Annual maintenance is required to ensure that all of the systems are functioning properly. 1. Caution user to maintain clean air filters at all a. Check to make sure that the drains are not times. Also, not to needlessly close off supply obstructed in any way. -
Page 30: Vent Options
VENT OPTIONS ENERGY RECOVERY VENTILATOR (Option) BAROMETRIC FRESH AIR DAMPER Before starting, make sure that the power has been (Standard) turned off. The return air grille panel must be removed. Before starting, make sure the power has been turned The energy recovery ventilator (QERV) can be seen off. -
Page 31: Figure 22 Fresh Air Damper Removal
FIGURE 22 FRESH AIR DAMPER REMOVAL MOUNTING SCREW Manual 2100-603 Page 31 of 44... -
Page 32: Figure 23 Qerv Removal
FIGURE 23 QERV REMOVAL POWER CONNECTORS MOUNTING SCREWS LOWER BLOWER ASSEMBLY POWER CONNECTOR FRONT FILL Manual 2100-603 Page 32 of 44... -
Page 33: Figure 24 Co 2 Controller
SEQUENCE OF OPERATION There is a check valve located in the reheat coil return line. It has a soft spring to hold the ball on the seat. Cooling – Circuit R-Y makes the thermostat pull in This will make the method of checking the ball freedom the compressor contactor starting the compressor with a magnet difficult. -
Page 34: Figure 25 A/C Mode Circuit Diagram
REFRIGERANT TUBE SCHEMATIC FOR When the unit is in standard cooling (Figure 26) or heating mode the reheat coil is inactive. REHEAT COIL Figure 25 shows the refrigerant gas flow through the reheat coil during the dehumidification mode. FIGURE 25 Q-TEC DEHUMIDIFICATION MODE CIRCUIT DIAGRAM Manual 2100-603 Page... -
Page 35: Figure 26 Dehum. Mode Circuit Diagram
PRESSURE SERVICE PORTS cycles. It is imperative to match the correct pressure curve to the unit by model number. Upper and lower High and low pressure service ports are installed on service doors must be attached to obtain proper reading. all units so that the system operating pressures can be observed. -
Page 36: Defrost Cycel
DEFROST CYCLE There is an initiate defrost jumper (sen jump) on the control that can be used at any outdoor ambient during The defrost cycle is controlled by temperature and time the heating cycle to simulate a 0° coil temperature. on the solid state heat pump control. -
Page 37: Figure 27 Defrost Control Board
FIGURE 27 DEFROST CONTROL BOARD TIME (SEC) LOW PRESSURE BYPASS TIMER SWITCH 120* (FACTORY SETTING 120 SECONDS) ACCUMULATED RUN TIME SELECTOR (FACTORY SETTING 30 MIN.) MIS-2684 A Manual 2100-603 Page 37 of 44... -
Page 38: Troubleshooting
TROUBLESHOOTING SOLID STATE HEAT PUMP CONTROL NOTE: If there was no power to 24 volt transformer, TROUBLESHOOTING PROCEDURE the compressor and outdoor fan motor will 1. NOTE: A thorough understanding of the defrost not start for 5 minutes. This is because of the compressor short cycle protection. -
Page 39: Checking Temperature Sensor
CHECKING TEMPERATURE SENSOR 4. If sensor resistance reads very low, then sensor is shorted and will not allow proper operation of the 1. Disconnect temperature sensor from board and heat pump control. from outdoor coil. 5. If sensor is out of tolerance, shorted, open, or reads 2. -
Page 40: Troubleshooting Ecm™ Blower Motors
TROUBLESHOOTING ECM MOTORS ™ Symptom Cause/Procedure CAUTION: • 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 41: Figure 28 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 To replace the control module for the GE variable-speed indoor blower 8b. -
Page 42: 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 7 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 43: Pressure Charts
TABLE 10 COOLING PRESSURE (ALL TEMPERATURES IN DEGREES F) RETURN AIR TEMPERATURE ENTERING OUTDOOR COIL MODEL PRESSURE 75° 80° 85° 90° 95° 100° 105° 110° 115° TEMP. 75 DB Low Side 62 WB High Side 80 DB Low Side Q24H2 67 WB High Side... -
Page 44: Table 11 Heating Pressure
TABLE 11 HEATING PRESSURE (ALL TEMPERATURES IN DEGREES F) RETURN AIR TEMPERATURE ENTERING OUTDOOR COIL MODEL PRESSURE TEMP. Low Side Q24H2D High Side Low Side Q30H2D High Side Low Side Q36H2D High Side Low Side Q42H2D High Side Low Side Q48H2D High Side Low Side...
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