Bard Q-TEC Q24H3DA Installation Instructions Manual Download Page 34 | Manualshive

Page: 34 / 44

Bard Q-TEC Q24H3DA Installation Instructions Manual Download Page 34

Manual 2100-653
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 Mode Circuit Diagram

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Summary of Contents for Q-TEC Q24H3DA

Page 1: ...c Bryan Ohio 43506 www bardhvac com Manual No 2100 653 Supersedes NEW Date 9 22 16 Q TECTM SERIES PACKAGED HEAT PUMP Models Q24H3DA Q24H3DB Q24H3DC Q30H3DA Q30H3DB Q30H3DC Q36H3DA Q36H3DB Q36H3DC Q42H...

Page 2: ...ctory Built In Electric Heat 4 Table 2 Electrical Specifications 5 Table 3 Operating Voltage Range 19 Table 4 Wall Thermostats and Controls 21 Table 5 Troubleshooting 38 Table 6 Temp vs Resistance of...

Page 3: ...nd Summer Manual N Air Conditioning Low Pressure Low Velocity ACCA Manual D or Duct System Design Manual Q Winter and Summer Air Conditioning For more information contact these publishers ACCA Air Con...

Page 4: ...glass P 2 Pleated Q 36 H 3 D A 10 X X X X X X CAPACITY 24 2 Ton 30 2 Ton 36 3 Ton 43 3 Ton 48 4 Ton 60 5 Ton KW 0Z 0KW 05 5KW 06 6KW 09 9KW 10 10KW 12 12KW 15 15KW COIL OPTIONS X Standard 1 Phenolic c...

Page 5: ...25 30 30 14 10 10 10 14 10 10 10 Q48H3DA0Z A05 A10 A15 230 208 1 1 1 or 2 1 or 2 1 or 2 37 62 87 87 50 70 90 90 8 6 3 3 10 8 8 8 37 37 37 25 50 50 50 50 50 25 50 50 8 8 8 10 8 8 10 10 10 10 10 10 Q48...

Page 6: ...Manual 2100 653 Page 6 of 44 FIGURE 1 Unit Dimensions...

Page 7: ...moved to provide a place to hold the unit The unit can be slid forward on the skid until the front wheels hang over the edge of the skid see Figure 3 B The unit can be tipped forward and slid down the...

Page 8: ...any separate equipment required to make up the entire air conditioning system should be carefully read before beginning the installation Note particularly Start Procedure and any tags and or labels at...

Page 9: ...Manual 2100 653 Page 9 of 44 FIGURE 6 Ducted Application FIGURE 5 Installation with Duct Free Plenum...

Page 10: ...lenum Box mounts on top of the unit and has both vertically and horizontally adjustable louvers on the front discharge grille For hot water coil option a QPBHWxx F for free blow or QPBHWxx D for ducte...

Page 11: ...rain is to be routed through an unconditioned space it must be protected from freezing The drain line must be able to be removed from the unit if it is necessary to remove the unit from the wall When...

Page 12: ...RE 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 FIGU...

Page 13: ...Manual 2100 653 Page 13 of 44 MIS 2469 DRAIN BOX WALL SLEEVE OVERFLOW TUBE CAULK AROUND TUBE FIGURE 12A...

Page 14: ...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 PLU...

Page 15: ...Manual 2100 653 Page 15 of 44 REMOVE KNOCK OUT FOR INDOOR DRAIN HOSE CONNECTOR MIS 2471 FIGURE 12C If Used...

Page 16: ...RAIN 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...

Page 17: ...13A Unit Mounting Method 1 Bottom Trim Piece Bottom Trim Extension Mounting Bracket Side Trim 2 PCS Side Trim 2 PCS Cabinet Side Panel Enlarged view of mounting bracket showing sleeve to cabinet atta...

Page 18: ...sides of the unit as it is being rolled to keep it centered in the sleeve Also check the alignment to the mounting brackets This unit must be level from side to side If adjustments are necessary shim...

Page 19: ...cuits required If this is the case the unit serial plate will so indicate All models are suitable only for connection with copper wire Each unit and or wiring diagram will be marked Use Copper Conduct...

Page 20: ...way valve are energized and the evaporator airflow is reduced The 3 way valve directs hot discharge gas into a separate desuperheating condenser circuit that reheats the conditioned air before it is d...

Page 21: ...to or Manual changeover CSB9E THO 3 stage Cool 3 stage Heat Programmable Non Programmable Electronic HP or Conventional Auto or Manual changeover with Humidity Control BacNet MS TP or Ethernet Connect...

Page 22: ...te Black White Black White Black Red Yellow Plug 4 2 3 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 12 W1 E 4102 063 B With X Thermostat Option 1 Dehumidification Wiring Diagram FACTORY INSTALLED J...

Page 23: ...llow Plug 4 2 3 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 12 D YO 3 2 1 And Demand Ventilation FACTORY INSTALLED JUMPER 1 With X Thermostat Option Dehumidification Wiring Diagram Bard Part 8403...

Page 24: ...Diagram Thermostat Plug 2 Pink Red White Brown Blue Yellow Orange Brown White Purple White Black White Brown Blue Yellow Orange Brown White Purple White Red Red White Red White Red White Black White...

Page 25: ...UT CO Controller Bard Part 8403 067 2 2 1 2 3 4 5 6 Red White TEMP OUT Red 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 W1 E G A Y1 Red Yellow Orange Yellow Blu...

Page 26: ...2 Pink Red White Brown Blue Yellow Orange Brown White Purple White Black White Brown Blue Yellow Orange Brown White Purple White Red Red White Red White Red White Black White Black White Black Red Ye...

Page 27: ...iple leaks and recharges R 410A refrigerant is close to being an azeotropic blend it behaves like a pure compound or single component refrigerant The remaining refrigerant charge in the system may be...

Page 28: ...to phase reversal The phase monitor in this unit is equipped with two LEDs If the Y signal is present at the phase monitor and phases are correct the green LED will light and the compressor contactor...

Page 29: ...e cabinet side panel g Remove screws that attach the duct work to the unit flanges This unit is equipped with four rollers mounted to the base For ease in pulling unit out from the wall it may be desi...

Page 30: ...gh the opening in the back of the unit The mist eliminator must be raised up and the bottom can be pulled toward the front of the unit and removed Q TEC Energy Recovery Ventilator Option Before starti...

Page 31: ...Manual 2100 653 Page 31 of 44 FIGURE 22 Fresh Air Damper Removal Mounting Screw...

Page 32: ...Manual 2100 653 Page 32 of 44 FIGURE 23 QERV Removal Mounting Screws Front Fill Lower Blower Assembly Blower Connector Power Connectors...

Page 33: ...ft spring to hold the ball on the seat This will make the method of checking the ball freedom with a magnet difficult Refer to Figures 25 and 26 for the location of the check valve and drain back capi...

Page 34: ...OR 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 inact...

Page 35: ...pper and lower service doors must be attached to obtain proper reading This unit employs high flow Coremax valves instead of the typical Shrader type valves WARNING Do NOT use a Schrader valve core re...

Page 36: ...ll remain accelerated and run through the 1 minute minimum defrost length sequence in a matter of seconds and will automatically terminate the defrost sequence There is an initiate defrost jumper sen...

Page 37: ...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 FIGU...

Page 38: ...between RV C and B C 1 Check control circuit wiring 2 Replace heat pump control Reversing valve solenoid coil defective Check for open or shorted coil Replace solenoid coil Unit will not go into defr...

Page 39: ...74 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 64 0 138...

Page 40: ...otor noise interview customer if necessary Air noise High static creating high blower speed Is airflow set properly Does removing filter cause blower to slow down Check filter Use low pressure drop fi...

Page 41: ...ion and orientation d Add a drip loop to the cables so that water cannot enter the motor by draining down the cables Refer to Figure 26 The installation is now complete Reapply the AC power to the HVA...

Page 42: ...ty of refrigerant listed on the serial plate AHRI capacity and efficiency ratings were determined by testing with this refrigerant charge quantity see Table 8 The following pressure tables show nomina...

Page 43: ...DB 67 WB Low Side High Side 134 341 135 363 136 387 137 412 138 439 140 468 141 498 143 530 144 563 146 598 85 DB 72 WB Low Side High Side 139 353 140 376 141 401 142 426 143 454 145 484 146 515 148 5...

Page 44: ...1 X X X X X X X Cooling Mode Occupied 1 X X X X X 1st Stage Heating Occupied 2 X X X X X X X X X 1st Stage Heating Unoccupied 2 X X X X X X X 2nd Stage Heating Occupied 3 X X X X X X X X X X X 2nd Sta...

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