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Bard QH243 manual

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Table of contents for the manual

  • Page 1

    Manual 2100-420H Page 1 of 3 4 Models: QH243 QH302 QH362 QH422 QH482 QH602 QTEC SERIES P ACKAGED HEA T PUMP INST ALLA TION INSTRUCTIONS Bard Manufacturing Company , Inc. Bryan, Ohio 43506 Since 1914 . . . Moving ahead, just as planned. Manual: 2100-420H Supersedes: 2100-420G File: V ol II T ab 14 Date: 06-28-07 © Copyright 2004[...]

  • Page 2

    Manual 2100-420H Page 2 of 3 4 CONTENTS Getting Other Information and Publications For more information, contact these publishers: .......... 3 QT EC General Information QT EC Model Nomenclature .......................................... 4 Shipping Damage ......................................................... 8 Unit Removal From Skid ...........[...]

  • Page 3

    Manual 2100-420H Page 3 of 3 4 GETTING OTHER INFORMA TION AND PUBLICA TIONS 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 E lectrical Code ..................... ANSI[...]

  • Page 4

    Manual 2100-420H Page 4 of 3 4 TABLE 1 FACTORY BUILT-IN ELECTRIC HEAT TABLE s l e d o M A - 3 4 2 H Q A - 2 0 3 H QB - 3 4 2 H QB - 2 0 3 H QC - 3 4 2 H QC - 2 0 3 H Q A - 2 6 3 H Q A - 2 2 4 H Q A - 2 8 4 H Q A - 2 0 6 H Q B - 2 6 3 H Q B - 2 2 4 H Q B - 2 8 4 H Q B - 2 0 6 H Q C - 2 6 3 H Q C - 2 2 4 H Q C - 2 8 4 H Q C - 2 0 6 H Q 1 - V 0 4 21 -[...]

  • Page 5

    Manual 2100-420H Page 5 of 3 4 ELECTRICAL SPECIFICATIONS CONTINUED ON PAGE 6 TABLE 2A 1 Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors. 2 Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes. 3 These “Minimum Circuit Ampacity” values a[...]

  • Page 6

    Manual 2100-420H Page 6 of 3 4 TABLE 2A ELECTRICAL SPECIFICATIONS (Continued) L E D O M D E T A R & S T L O V E S A H P T I U C R I C E L G N I ST I U C R I C L A U D . O N D L E I F R E W O P S T I U C R I C 3 M U M I N I M T I U C R I C Y T I C A P M A 1 M U M I X A M L A N R E T X E R O E S U F T I U C R I C R E K A E R B 2 D L E I F R E W O[...]

  • Page 7

    Manual 2100-420H Page 7 of 3 4 FIGURE 1 UNIT DIMENSIONS[...]

  • Page 8

    Manual 2100-420H Page 8 of 3 4 SHIPPING DAMAGE 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 inspect[...]

  • Page 9

    Manual 2100-420H Page 9 of 3 4 HANDLING UNIT AFTER REMOVAL FROM SKID The unit will have to be turned sideways and removed from the skid to fit through a 36" doorway. If the door height allows, the unit can be slid sideways through the door. If the unit can not be slid through the door, then the unit will have to be put on a cart and tipped dow[...]

  • Page 10

    Manual 2100-420H Page 10 of 3 4 FIGURE 6 DUCTED APPLICATION FIGURE 5 INSTALLATION WITH FREE BLOW PLENUM[...]

  • Page 11

    Manual 2100-420H Page 11 of 3 4 DUCT WORK Any heat pump is more critical of proper operating charge and an adequate duct system than a straight air conditioning unit. All duct work 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 du[...]

  • Page 12

    Manual 2100-420H Page 12 of 3 4 FRESH AIR INTAKE This unit is equipped with a fresh air damper assembly. The damper blade is locked in the closed position when the unit is shipped from the Factory. To allow the damper to operate remove the two plastic locking pins, one on each end of the blade. This will allow for maximum fresh airflow. The damper [...]

  • Page 13

    Manual 2100-420H Page 13 of 3 4 SERVICE LIGHT The unit is equipped with a service light which signals the user that service is required. The light is located in the upper control panel and is visible only when the hinged service/filter access door is open. The Service Unit light indicates that the unit has been shut off by a high or low pressure de[...]

  • Page 14

    Manual 2100-420H Page 14 of 3 4 INST ALLA TION INSTRUCTIONS MOUNTING THE UNIT When installing a QT EC unit near an interior wall on the left side, a minimum of 8 inches is required; 12 inches is preferred. When installing a QT EC unit near an interior wall on the right side, a minimum of 18 inches is required as additional space is required to conn[...]

  • Page 15

    Manual 2100-420H Page 15 of 3 4 The standard Climate Control Option X is a remote thermostat connection terminal block. See Figure 16 for wiring diagram. Compatible thermostats are listed in Table 4. The Climate Control Option A is an electronic, non- programmable manual or auto changeover thermostat. The subbase of the thermostat is factory wired [...]

  • Page 16

    Manual 2100-420H Page 16 of 3 4 LOW VOLTAGE CONNECTIONS These units use a grounded 24 volt AC low voltage circuit. The “R” terminal is the hot terminal and the “C” terminal is grounded. “G” terminal or pins 6 and 1 of P2 are the fan inputs . Both must be energized for proper fan operation. This is done automatically in the factory insta[...]

  • Page 17

    Manual 2100-420H Page 17 of 3 4 MIS-1285 FIGURE 15 TABLE 4 WALL THERMOSTATS t a t s o m r e h Ts e r u t a e F t n a n i m o d e r P 0 6 0 - 3 0 4 8 ) 5 4 4 - 0 2 1 1 ( t a e H e g a t s 3 ; l o o C e g a t s 3 c i n o r t c e l E e l b a m m a r g o r P - n o N / e l b a m m a r g o r P l a n o i t n e v n o C r o P H r e v o e g n a h c l a u n a[...]

  • Page 18

    Manual 2100-420H Page 18 of 3 4 FIGURE 16 REMOTE THERMOSTAT WIRING DIAGRAM “X” THERMOSTAT OPTION NOTE: On option X or A the CS2000A1 (or other field provided means to control ventilation) must be used if any of the motorized ventilation options are installed. VENTILA TOR OR DAMPER[...]

  • Page 19

    Manual 2100-420H Page 19 of 3 4 FIGURE 17 UNIT MOUNTED THERMOSTAT WIRING DIAGRAM “A” THERMOSTAT OPTION NOTE: On option X or A the CS2000A1 (or other field provided means to control ventilation) must be used if any of the motorized ventilation options are installed.[...]

  • Page 20

    Manual 2100-420H Page 20 of 3 4 FIGURE 18 UNIT MOUNTED THERMOSTAT WIRING DIAGRAM “D” THERMOSTAT OPTION[...]

  • Page 21

    Manual 2100-420H Page 21 of 3 4 ST ART UP DESCRIPTION OF STANDARD EQUIPMENT Solid State Electronic Heat Pump Control Provides efficient 30-minute defrost cycle. A thermistor sensor and speed up terminal for service along with a 10- minute defrost override are standard on the electronic heat pump control. High / Low Pressure Switch Provides refriger[...]

  • Page 22

    Manual 2100-420H Page 22 of 3 4 SERVICE HINTS 1. Caution user to maintain clean air filters at all times. Also, not to needlessly close off supply air registers. This may reduce airflow through the system, which shortens equipment service life as well as increasing operating costs and noise levels. 2. Switching to heating cycle at 75°F or higher o[...]

  • Page 23

    Manual 2100-420H Page 23 of 3 4 QT EC R ENERGY RECOVERY VENTILATOR (Option) Before starting, make sure that the power has been turned off. The return air grille panel must be removed. The energy recovery ventilator (QERV) can be seen after the panel has been removed. To gain access to the mist eliminator, the QERV must be removed. See Figure 20. 1.[...]

  • Page 24

    Manual 2100-420H Page 24 of 3 4 FIGURE 19 FRESH AIR DAMPER REMOVAL MOUNTING SCREW[...]

  • Page 25

    Manual 2100-420H Page 25 of 3 4 FIGURE 20 QERV REMOVAL MOUNTING SCREWS FRONT FILL LOWER BLOWER ASSEMBL Y POWER CONNECTOR POWER CONNECTORS[...]

  • Page 26

    Manual 2100-420H Page 26 of 3 4 SEQUENCE OF OPERATION Cooling – Circuit R-Y makes the thermostat pull in the compressor contactor starting the compressor and outdoor motor. The G (indoor motor) circuit is automatically completed on any call for cooling operation, or can be energized by manual fan switch on subbase for constant air circulation. He[...]

  • Page 27

    Manual 2100-420H Page 27 of 3 4 DEFROST CYCLE The defrost cycle is controlled by temperature and time on the solid state heat pump control. When the outdoor temperature is in the lower 40°F temperature range or colder, the outdoor coil temperature is 32°F or below. This coil temperature is sensed by the coil sensor mounted near the bottom of the [...]

  • Page 28

    Manual 2100-420H Page 28 of 3 4 TROUBLESHOOTING TABLE 5 TROUBLESHOOTING m o t p m y Ss e s u a C e l b i s s o P r i a p e R / k c e h C o t w o H & t a h W l l i w r o s s e r p m o C g n i t a e h ( t r a t s t o n ) g n i l o o c r o C o t R m o r f V 4 2 r o f k c e h C l o r t n o c p m u p t a e h e h t n o t u p n i r e m r o f s n a r t[...]

  • Page 29

    Manual 2100-420H Page 29 of 3 4 CHECKING TEMPERATURE SENSOR 1. Disconnect temperature sensor from board and from outdoor coil. 2. Use an ohmmeter and measure the resistance of the sensor. Also use ohmmeter to check for short or open. 3. Check resistance reading to chart of resistance use sensor ambient temperature. (Tolerance of part is ± 10%.) 4.[...]

  • Page 30

    Manual 2100-420H Page 30 of 3 4 TROUBLESHOOTING GE ECM ™ MOT ORS CAUTION: Disconnect power from unit before removing or replacing connectors, or servicing motor. To avoid electric shock from the motor’s capacitors, disconnect power and wait at least 5 minutes before opening motor. Symptom Cause/Procedure Motor rocks slightly • This is normal [...]

  • Page 31

    Manual 2100-420H Page 31 of 3 4 TROUBLESHOOTING GE ECM ™ MOT ORS CONT’D. Replacing ECM Control Module To replace the control module for the GE variable-speed indoor blower motor you need to take the following steps: 1. You MUST have the correct replacement module. The controls are factory programmed for specific operating modes. Even though the[...]

  • Page 32

    Manual 2100-420H Page 32 of 3 4 FAN BLADE SETTING DIMENSIONS Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimensions in Table 7 be checked and blade adjusted in or out of the motor shaft accordingly. 1 Maximum ESP (inches WC) shown is with 1" thick disposable filter (reduced by .2 for 2&qu[...]

  • Page 33

    Manual 2100-420H Page 33 of 3 4 Low side pressure ± 2 psig High side pressure ± 5 psig T ables are based upon rated CFM (airflow) across the evaporator coil. If there is any doubt as to correct operating charge being in the system, the charge should be removed, system evacuated and recharged to serial plate instructions.  75°F outdoor tempera[...]

  • Page 34

    Manual 2100-420H Page 34 of 3 4 Refer to notes following T able 10 TABLE 11 HEATING PRESSURE (ALL TEMPERATURES IN DEGREES F) L E D O M N R U T E R R I A . P M E TE R U S S E R P L I O C R O O D T U O G N I R E T N E E R U T A R E P M E T R I A 05 0 15 10 25 20 35 30 45 40 55 50 6 3 4 2 H Q 0 7 e d i S w o L e d i S h g i H 7 7 4 1 2 1 5 5 1 7 1 4 6[...]