Table Of Contents - Bard Q36A4DA Installation Instructions Manual

CONTENTS
Getting Other Information and Publications .........3
Q-TEC General Information .....................................4
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Q-TEC Model Nomenclature ...................................4
Shipping Damage ..................................................4
Unit Removal from Skid .........................................4
Handling Unit after Removal from Skid ...................6
General ................................................................6
Minimum Installation Height ..................................7
Duct Work ............................................................8
Filters ..................................................................8
Switching Filter Sizes .....................................9
Fresh Air Intake ...........................................................9
Vent Options ..............................................................9
Barometric Fresh Air Damper (Standard) .................9
Commercial Room Ventilator (Option) ....................10
Q-TEC Energy Recovery Ventilator (Option) ............10
Installation ..................................................................11
Basic Installation Design and Application Planning .. 11
Mounting the Unit ...............................................11
Condensate Drain ................................................13
Optional Rear Drain Kits ................................14
Indoor Ducted and Non-Ducted Applications ..........18
Indoor Supply Airflow ....................................18
Indoor Return Airflow ....................................18
Ducted Applications ......................................18
Free Blow Applications ..................................18
Thermostat or Indoor Temperature Sensor
Placement ...................................................18
Wiring - Main Power ............................................20
High Voltage Connections ..............................20
Wiring - Low Voltage ...........................................21
Low Voltage Connections ...............................21
Unit Shutdown Feature .................................21
Balanced Climate
Dehumidification Feature ..............................21
Ventilation Features ......................................21
Low Ambient Control .....................................21
Freeze Protection Thermostat ..................22
Start Up ........................................................................25
General ............................................................25
Topping Off System Charge ..................................25
Safety Practices ..................................................25
Vent Connection Plug ..........................................25
Pressure Service Ports .........................................25
Important Installer Notes .....................................26
Dehumidification Models ...............................26
Service Hints ......................................................26
High and Low Pressure Switches ..........................26
Pressure Switch Lockout ...............................26
Three Phase Scroll Compressor Start Up
Information ........................................................26
Compressor Control Module ..................................26
Over and Under Voltage Protection .................27
Intelligent Reset ...........................................27
Alarm Output ...............................................27
High Pressure Switch and Lockout Sequence ..27
Troubleshooting Compressor Logic CCM ..........27
High Pressure Switch .............................27
Manual 2100-752B
Page 2 of 49
Feature ...........................21
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Low Pressure Switch ..............................27
Freeze Stat Switch .................................27
Logic Control Board ................................28
Phase Monitor ....................................................28
Condenser Fan Operation .....................................28
Sequence of Operation ........................................28
Balanced Climate
Service .........................................................................30
Troubleshooting ECM 142R Outdoor Fan Motors ....... 30
Replacing the Motor .....................................31
Troubleshooting ECM Indoor Blower Motors ...........32
Replacing ECM Control Module ......................33
Fan Blade Setting Dimensions ..............................35
R-410A Refrigerant Charge ..................................35
Removal of Fan Shroud ........................................35
Dehumidification Unit Instructions .......................41
Dehumidification Circuit ......................................41
Dehumidification Sequence of Operation ...............41
Balanced Climate Mode .......................................41
Electronic Expansion Valve ...................................41
Operation .....................................................41
EEV Instructions for Vacuuming,
Reclaiming and Charging Unit .......................41
Troubleshooting the Electronic Expansion
Valve ...........................................................42
Control Board ........................................43
Electronic Expansion Valve ......................43
Relay in EEV Control Box ........................43
Stator Coil .............................................43
Transducer Sensor ..................................43
Thermistor Sensor ..................................44
Air Conditioning Mode Circuit Diagram ..................45
Dehumidification Mode Circuit Diagram ................45
Q36A4D Cooling and Dehumidification
Application Data .................................................46
Q42A4D Cooling and Dehumidification
Application Data .................................................47
Q48A4D Cooling and Dehumidification
Application Data .................................................48
TABLES
Table 1 Wall Thermostats ...................................22
Table 2 Humidity Controls ..................................22
Table 3 CO Controllers ......................................22
2
Table 4 Thermostat Wire Size..............................22
Table 5 Troubleshooting ECM 142R Outdoor
Fan Motors ............................................31
Table 6 Troubleshooting ECM Blower Motors ........34
Table 7 Fan Blade Dimensions ............................35
Table 8A Cooling Pressure - Standard Airflow .........36
Table 8B Cooling Pressure - Balanced Climate
Airflow ..................................................36
Table 9 Electrical Specifications Q**A4D Series .... 37
Table 10 Indoor Blower Performance .....................38
Table 11 Maximum ESP Electric Heat Only ............38
Table 12 Electric Heat .........................................38
Table 13 Electronic Expansion Valve
Troubleshooting .....................................42
Mode ..............................29
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