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Bard Q24H2DA Installation Instructions Manual

Manual is about: q-tec series

Summary of Q24H2DA

  • Page 1

    Page 1 of 44 installation instructions bard manufacturing company, inc. Bryan, ohio 43506 www.Bardhvac.Com manual no.: 2100-603b supersedes: 2100-603a date: 8-3-16 q-tec tm series packaged heat pump models: q24h2da q24h2db q24h2dc q30h2da q30h2db q30h2dc q36h2da q36h2db q36h2dc q42h2da q42h2db q42h2...

  • Page 2: Contents

    Manual 2100-603b page 2 of 44 contents figures figure 1 unit dimensions ....................................... 6 figure 2 air seal under unit ................................... 7 figure 3 removal of unit from skid ........................ 7 figure 4 unit on appliance cart for moving .................

  • Page 3

    Manual 2100-603b page 3 of 44 getting other information and publications 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. Natio...

  • Page 4: Q-Tec

    Manual 2100-603b page 4 of 44 table 1 factory built-in electric heat table (see table 2 for available electric heat by unit model) nominal kw at 240v at 208v at 480v at 460v kw 1-ph amps 3-ph amps btuh kw 1-ph amps 3-ph amps btuh kw 3-ph amps btuh kw 3-ph amps btuh 5.0 5.0 20.8 17,065 3.75 18.0 12,7...

  • Page 5

    Manual 2100-603b page 5 of 44 model rated volts & phase no. Field power circuits single circuit dual circuit minimum circuit ampacity maximum external fuse or ckt. Brkr. Field power wire size ground wire minimum circuit ampacity maximum external fuse or ckt. Breaker field power wire size ground wire...

  • Page 6

    Manual 2100-603b page 6 of 44 figure 1 unit dimensions q24h2d q60h2d q30h2d q36h2d q42h2d q48h2d.

  • Page 7: Warning

    Manual 2100-603b page 7 of 44 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 immed...

  • Page 8: Warning

    Manual 2100-603b page 8 of 44 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 ...

  • Page 9

    Manual 2100-603b page 9 of 44 figure 6 ducted application figure 5 installation with duct free plenum.

  • Page 10

    Manual 2100-603b page 10 of 44 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 (acc...

  • Page 11

    Manual 2100-603b page 11 of 44 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 ...

  • Page 12

    Manual 2100-603b page 12 of 44 water trap figure 11 rear drain (top view) wall (maximum 10" for rear drain) couplings not shown but recommended for ease of removability for service. Sleeve drain line wall bracket unit figure 10 standard rear drain figure 9 optional side drain (side view) q-tec unit.

  • Page 13

    Manual 2100-603b page 13 of 44 mis -2469 dr ai n b ox w all s leeve ove rf lo w t ube ca ul k a ro und t ube figure 12a.

  • Page 14

    Manual 2100-603b page 14 of 44 supplied with drain box kit 3/4" plastic pipe nipple horizontal to floor) (tighten threads so tee is threads) (apply teflon tape to rear drain connection in q/tec product 1/2" slip x 1/2" slip x 3/4" npt tee supplied with drain box kit plug installed in side q/tec drai...

  • Page 15

    Manual 2100-603b page 15 of 44 remove knock-out for indoor drain hose connector mis-2471 figure 12c (if used).

  • Page 16

    Manual 2100-603b page 16 of 44 mis-2472 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 perform...

  • Page 17

    Manual 2100-603b page 17 of 44 washer sleeve stud mis-2689 nut lower control panel condenser door (removed) return grille figure 13a unit mounting bottom trim piece bottom trim extension mounting bracket side trim (2 pcs.) side trim (2 pcs.) cabinet side panel enlarged view of mounting bracket showi...

  • Page 18: Installation

    Manual 2100-603b page 18 of 44 installation mounting the unit when installing a q-tec unit near an interior wall on the left side, a minimum of 8 inches is required; 12 inches is preferred. When installing a q-tec unit near an interior wall on the right side, a minimum of 18 inches is required as ad...

  • Page 19

    Manual 2100-603b page 19 of 44 optional climate controls sequence of operation the standard climate control option x is a remote thermostat connection terminal block. See figure 17 or figure 18 for wiring diagram. Compatible thermostats are listed in table 4. The climate control option e is an elect...

  • Page 20

    Manual 2100-603b page 20 of 44 if the unit is running in heat pump mode and the humidistat calls for dehumidification, the dehumidification mode takes precedence over the heat pump heating mode. The unit will not return to the heating mode until 2nd stage heating is called for. The climate control o...

  • Page 21: Caution

    Manual 2100-603b page 21 of 44 general this unit is equipped with a variable speed ecm motor. The motor is designed to maintain rated airflow up to the maximum static allowed. It is important that the blower motor plugs are not plugged in or unplugged while the power is on. Failure to remove power p...

  • Page 22

    Manual 2100-603b page 22 of 44 1 protect tstat fr eeze bard part #8408-038 11 rat c r e1 bk twv yo a2 y b l l e1 g1 rv w a1 w2 g d relay logic board retur n ai r ther mostat pl ug #2 pi nk red/white br own bl ue yel low or ange br own/white pur ple/w hite bla ck/w hit e br own bl ue yel low or ange ...

  • Page 23

    Manual 2100-603b page 23 of 44 pr ote ct t stat fr ee ze ba rd pa rt #8408-038 11 rat c r e1 bk tw v yo a2 y b l l e1 g1 rv w a1 w 2 g d re lay log ic boa rd retu rn air the rm os tat pl ug #2 pi nk re d/w hite bro wn bl ue ye llow ora nge bro wn /w hite pu rp le/ w hite bl ac k/w hite bro wn bl ue ...

  • Page 24

    Manual 2100-603b page 24 of 44 figure 19 unit mounted thermost at wiring diagram “e” thermost at option 41 02-064 b ther mostat with "e" the rmosta t option rat c r e1 bk twv yo a2 y pur ple/w hite l l e1 g1 rv w a1 w2 g d relay logic b oard dehumi dif icati on wi ring di agr am ther mostat pl ug #2...

  • Page 25

    Manual 2100-603b page 25 of 44 figure 20 unit mounted thermostat wiring diagram “i” thermostat option 1 24 vac co2-out co controller bard part #8403-067 2 2 1 2 3 4 5 6 re d/w hite temp-out bl ac k/w hite black/white 8403-060 with "i" thermostat option plug #4 1 2 3 4 5 6 7 8 9 10 11 12 l c r w2 b w...

  • Page 26

    Manual 2100-603b page 26 of 44 figure 21 unit mounted thermost at wiring diagram “j” or “k” thermost at option sc sc sc bl ac k/w hite w ith "e " t he rm os ta to pt ion rat c r e1 bk tw v yo a2 y b l l e1 g1 rv w a1 w 2 g d 41 02 -079 de hu m idi fica tion w irin g di ag ram the rm os tat pl ug #2 ...

  • Page 27: Start Up

    Manual 2100-603b page 27 of 44 start up these units require r-410a refrigerant and polyol ester oil. General 1. Use separate service equipment to avoid cross contamination of oil and refrigerants. 2. Use recovery equipment rated for r-410a refrigerant. 3. Use manifold gauges rated for r-410a (800 ps...

  • Page 28

    Manual 2100-603b page 28 of 44 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 ...

  • Page 29

    Manual 2100-603b page 29 of 44 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...

  • Page 30

    Manual 2100-603b page 30 of 44 vent options barometric fresh air damper (standard) before starting, make sure the power has been turned off. The return air grille panel must be removed. The fresh air damper assembly can be seen on the back of the unit. See figure 22. 1. The fresh air damper is attac...

  • Page 31

    Manual 2100-603b page 31 of 44 figure 22 fresh air damper removal mounting screw.

  • Page 32

    Manual 2100-603b page 32 of 44 figure 23 qerv removal mounting screws front fill lower blower assembly power connector power connectors.

  • Page 33

    Manual 2100-603b page 33 of 44 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 swi...

  • Page 34

    Manual 2100-603b page 34 of 44 refrigerant tube schematic for reheat coil figure 25 shows the refrigerant gas flow through the reheat coil during the dehumidification mode. When the unit is in standard cooling (figure 26) or heating mode, the reheat coil is inactive. Figure 25 q-tec dehumidification...

  • Page 35

    Manual 2100-603b page 35 of 44 pressure service ports high and low pressure service ports are installed on all units so that the system operating pressures can be observed. Pressure curves can be found later in the manual covering all models on both cooling and heating cycles. It is imperative to ma...

  • Page 36

    Manual 2100-603b page 36 of 44 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 ...

  • Page 37

    Manual 2100-603b page 37 of 44 120* sw 1 sw 2 time (sec) off off on on off on off on 30 60 180 low pressure bypass timer switch (factory setting 120 seconds) accumulated run time selector (factory setting 30 min.) mis-2684 a on off figure 27 defrost control board.

  • Page 38: Troubleshooting

    Manual 2100-603b page 38 of 44 troubleshooting sympton description, check & possible causes what & how to check/repair compressor will not start (heating or cooling) 1. Check for led illumination. Is there an led illuminated on the board (flashing)? Yes = go to step #2; no = go to step #3 2. Check f...

  • Page 39

    Manual 2100-603b page 39 of 44 checking temperature sensor 1. Disconnect temperature sensor from board and from outdoor coil. 2. Use an ohmmeter to 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 ambien...

  • Page 40

    Manual 2100-603b page 40 of 44 troubleshooting ecm™ motors 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 ...

  • Page 41

    Manual 2100-603b page 41 of 44 manual 2100-522b page 36 of 38 troubleshooting ge ecm ™ motors cont’d. Motor motor ok when r > 100k ohm ecm 2.0 only remove hex head bolts connector orientation between 4 and 8 o'clock drip loop back of control figure 5 winding test figure 4 note: use the shorter bolts...

  • Page 42

    Manual 2100-603b page 42 of 44 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. Maximum esp (inches wc) shown is with 1" thick...

  • Page 43

    Manual 2100-603b page 43 of 44 model return air temp. Pressure air temperature entering outdoor coil 75° 80° 85° 90° 95° 100° 105° 110° 115° q24h2 75 db 62 wb low side high side 122 369 121 378 121 391 121 407 122 426 122 449 123 474 125 503 128 535 80 db 67 wb low side high side 130 378 129 388 129...

  • Page 44

    Manual 2100-603b page 44 of 44 model return air temp. Pressure air temperature entering outdoor coil 0 5 10 15 20 25 30 35 40 45 50 55 60 65 q24h2d 70 low side high side 35 273 42 284 49 295 56 307 62 318 69 329 76 340 83 351 89 362 96 374 103 385 110 396 116 407 123 418 q30h2d 70 low side high side...