Bard Q36A4DA Installation Instructions Manual Download Page 1

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11EER Q-TEC

Q**A4D Series

Packaged Air Conditioner

Models:

INSTALLATION INSTRUCTIONS

Q36A4DA
Q36A4DB
Q36A4DC

Q42A4DA
Q42A4DB
Q42A4DC

Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com

Manual: 2100-752B
Supersedes: 2100-752A
Date: 5-14-21

Q48A4DA
Q48A4DB
Q48A4DC

Summary of Contents for Q36A4DA

Page 1: ...kaged Air Conditioner Models INSTALLATION INSTRUCTIONS Q36A4DA Q36A4DB Q36A4DC Q42A4DA Q42A4DB Q42A4DC Bard Manufacturing Company Inc Bryan Ohio 43506 www bardhvac com Manual 2100 752B Supersedes 2100...

Page 2: ...e 27 Troubleshooting Compressor Logic CCM 27 High Pressure Switch 27 Low Pressure Switch 27 Freeze Stat Switch 27 Logic Control Board 28 Phase Monitor 28 Condenser Fan Operation 28 Sequence of Operati...

Page 3: ...re Resistance 44 Table 15 Dehumidification Relay Logic Board 49 FIGURES Figure 1 Air Seal Under Q TEC Unit 5 Figure 2 Removal of Q TEC Unit from Skid 5 Figure 3 Fan Assembly Removal 6 Figure 4 Q TEC U...

Page 4: ...RNING Heavy item hazard Use more than one person to handle unit Check unit wheels to ensure that wheels are locked before removing from skid Failure to do so could result in unit damage or serious inj...

Page 5: ...100 752B Page 5 of 49 FIGURE 1 Air Seal Under Q TEC Unit Hold Skid Down A Shipping Brackets B Front Wheels Over Edge C Front Wheels On Floor FIGURE 2 Removal of Q TEC Unit from Skid Air Seal MIS 1008...

Page 6: ...ct work For use without duct work Plenum Box QPB36 is recommended These instructions explain the recommended method to install the air cooled self contained unit and the electrical wiring connections...

Page 7: ...provides enough clearance to install the duct work see Figure 6 FIGURE 5 Installation with Duct Free Plenum 8 FT 5 IN 8 FT 6 IN MINIMUM REQUIRED INSTALLATION HEIGHT MIS 4174 FLOOR MIS 4174 FIGURE 6 Du...

Page 8: ...supply a Q4CX Cabinet Extension can be used to conceal the duct work above the unit to the ceiling This extends 20 above the unit for a total height above the floor of 10 7 8 The unit is equipped wit...

Page 9: ...located in the rear of the unit and to gain access to make these adjustments remove the air filter service door All capacity efficiency and cost of operation information as required for Department of...

Page 10: ...after the panel has been removed To gain access to the mist eliminator the QERV must be removed 1 The front fill plate of the QERV must be removed There is one screw on either side of the plate Remove...

Page 11: ...pieces to the wall This unit is to be secured to the wall sleeve with mounting brackets provided The unit itself the supply duct and the free blow plenum are suitable of 0 clearance to combustible mat...

Page 12: ...tom Trim Extension Mounting Bracket Side Trim 2 PCS Side Trim 2 PCS Cabinet Side Panel Enlarged view of mounting bracket showing sleeve to cabinet attachment Mounting Bracket 8 Screw Provided Light Co...

Page 13: ...gth to trim up to a 10 2 ceiling NOTE If the exterior wall thickness is between 5 and 10 5 a side trim extension piece kit model QSTX42 is available Condensate Drain There are two drain connections on...

Page 14: ...cal growth to occur by minimizing the standing water and exposing it to warm temperatures See Figures 18A 18B 18C and 18D on pages 15 18 The drain box permanently mounts onto the wall sleeve and is th...

Page 15: ...A MIS 2469 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...

Page 16: ...Manual 2100 752B Page 16 of 49 MIS 2471 A REMOVE KNOCK OUT FOR INDOOR DRAIN HOSE CONNECTOR FIGURE 18C If used...

Page 17: ...OVE 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 S...

Page 18: ...pply flanges before unit installation to help with duct connections inside the structure Supply ducts must be properly sized for the design airflow requirement of the equipment Air Conditioning Contra...

Page 19: ...T DRAIN OPT 3 375 7 000 2 000 2 000 OPTIONAL HIGH VOLTAGE FREEBLOW PLENUM OPTIONAL LOW VOLTAGE ELECTRICAL ENTRANCE ELECTRICAL ENTRANCE TOP VIEW SHOWN WITHOUT SUPPLY AIR OPENING TOP VIEW SHOWN WITHOUT...

Page 20: ...e various insulation grades of wiring material All wiring must conform to NEC and all local codes FIGURE 20 High Voltage Connections The electrical data on the serial plate in the unit specifications...

Page 21: ...input for Balanced Climate compressor cooling operation The Y2 terminal is the 24VAC input for compressor cooling standard operation Y1 and Y2 are connected with a brass jumper bar which can be remov...

Page 22: ...Cnet compatible CS9B THOCA 3 stage Cool 3 stage Heat Programmable Non Programmable HP or Conventional Auto or Manual Changeover Humidity Sensor w dehumidification CO2 Sensor Motion Sensor w Intelligen...

Page 23: ...only see vent instruction manuals 5 Change model configuration from heat pump to heat cool Must be configured to programmable and fan set to be programmed fan for the A output to function during sched...

Page 24: ...t installation manual 6 For vent operation add jumper if optional CO2 controller is not used Vent will run while blower is energized For ECON CRV V an additional wire change is required See install Ma...

Page 25: ...to instructions for the cylinder that is being utilized for proper method of liquid extraction Safety Practices 1 Never mix R 410A with other refrigerants 2 Use gloves and safety glasses Polyol ester...

Page 26: ...mpressors like several other types of compressors will only compress in one rotational direction Direction of rotation is not an issue with single phase compressors since they will always start and ru...

Page 27: ...l is sent to L terminal Low Pressure Switch Terminals LP1 and LP2 Circuit will be proved as closed prior to energizing A or CC terminals The condition of the LP terminals will then be ignored for the...

Page 28: ...lockout of the compressor circuit will occur requiring a manual system reset The compressor logic control board has five LED lights providing status updates of the system operation see Figure 24 When...

Page 29: ...fortable environment This mode will also increase the supply temperature when in heating mode When Balanced Climate mode is activated it is employed in both heating and cooling modes Balanced Climate...

Page 30: ...d based upon varied outdoor ambient conditions to optimize sound and unit efficiency 3 If the system is noisy freezing up running a high head pressure tripping the high pressure switch or compressor o...

Page 31: ...ardware to reduce vibration Make sure all wires are free of the fan blade and not pinched in mountings or cabinet through points Check line power to motor Check between red and black wires for line po...

Page 32: ...ine if it s air noise cabinet duct or motor noise interview customer if necessary Air noise High static creating high blower speed Is airflow set properly Does removing filter cause blower to slow dow...

Page 33: ...motor plug just removed to the motor shell is 100K ohms Refer to Figure 26 Measure to unpainted motor end plate If any motor lead fails this test do not proceed to install the control module THE MOTOR...

Page 34: ...ode Heat 1st Bank of Elec Heat Heat 1st 2nd Bank of Elec Heat Thermostat 24 VAC Input Signals G G Y1 G Y1 Y2 D G B W1 G B W1 W2 Pin 1 24 VAC C Common Signal Always Energized Pin 2 Not Used Pin 3 24 VA...

Page 35: ...e outdoor fan 3 The fan shroud and motor assembly can be removed from the unit by four 4 screws and the coil top fill then the six 6 screws from the shroud sides Fan motor must be unplugged from motor...

Page 36: ...Tables 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 and system evacuated and recha...

Page 37: ...ld power conductors Refer to the National Electrical code latest version Article 310 for power conductor sizing CAUTION When more than one field power circuit is run through one conduit the conductors...

Page 38: ...Performance TABLE 11 Maximum ESP of Operation Electric Heat Only Values shown are for units equipped with standard 1 throwaway filter or 1 washable filter Derate ESP by 15 for 2 pleated filters Nomin...

Page 39: ...Manual 2100 752B Page 39 of 49 GRAPH 2 Q42A4D FAD Ventilation Delivery GRAPH 1 Q36A4D FAD Ventilation Delivery...

Page 40: ...Manual 2100 752B Page 40 of 49 GRAPH 3 Q48A4D FAD Ventilation Delivery...

Page 41: ...further heat transfer When the humidistat is satisfied the system automatically switches off The result is separate humidity control at minimum operating cost Dehumidification Sequence of Operation D...

Page 42: ...opened manually using the magnetic EEV service tool Bard P N 2151 021 shown in Figure 31 To do this remove the EEV stator coil red color with retaining nut on top slide the magnetic tool over the shaf...

Page 43: ...ange replace the relay Stator Coil Disconnect the stator from the valve and the control and measure the resistance of the windings using an electrical tester The resistance of both windings should be...

Page 44: ...6 8 36 6 700 98 6 37 6 470 100 4 38 6 250 102 2 39 6 030 104 40 5 830 105 8 41 5 630 107 6 42 5 440 109 4 43 5 260 111 2 44 5 080 113 45 4 910 114 8 46 4 750 116 6 47 4 590 118 4 48 4 440 120 2 49 4 3...

Page 45: ...ion Mode Circuit Diagram 4 WAY VALVE COMPRESSOR REHEAT COIL EVAPORATOR COIL EEV CHECK VALVE CONDENSER COIL SUCTION PRESSURE TRANSDUCER FOR EEV MIS 4017 A EVAPORATOR COIL CONDENSER COIL REHEAT COIL 4 W...

Page 46: ...G3 320 280 363 311 409 343 75 65 5 60 RH Total Cooling Btuh 38 700 17 100 37 100 12 600 35 100 8 200 Sensible Btuh 25 100 3 700 24 200 400 23 200 2 900 S T 0 649 0 216 0 652 0 032 0 661 0 Latent Btuh...

Page 47: ...G3 320 280 363 311 409 343 75 65 5 60 RH Total Cooling Btuh 38 700 17 100 37 100 12 600 35 100 8 200 Sensible Btuh 25 100 3 700 24 200 400 23 200 2 900 S T 0 649 0 216 0 652 0 032 0 661 0 Latent Btuh...

Page 48: ...arge PSIG3 339 292 382 323 428 354 75 65 5 60 RH Total Cooling Btuh 50 300 20 200 47 700 15 100 44 600 9 300 Sensible Btuh 32 200 3 500 30 700 0 29 100 4 400 S T 0 640 0 173 0 644 0 000 0 652 0 Latent...

Page 49: ...rips and Dehum Unoccupied X X X X X X X X X D Dehum Unoccupied X X X X D A Dehum Occupied X X X X X X TABLE 15 Dehumidification Relay Logic Board Cooling takes precedence over dehumidification A cooli...

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