Bard Q-TEC Q A4D Series Installation Instructions Manual page 26

CONTENTS
Getting Other Information and Publications .........4
Q-TEC General Information .....................................5
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Q-TEC Model Nomenclature ...................................5
Shipping Damage ..................................................5
Unit Removal from Skid .........................................6
Handling Unit after Removal from Skid ...................7
General ................................................................7
Minimum Installation Height ..................................8
Duct Work ............................................................9
Filters ..................................................................9
Switching Filter Sizes ...................................10
Fresh Air Intake .........................................................10
Vent Options ............................................................10
Barometric Fresh Air Damper (Standard) ...............10
Commercial Room Ventilator (Option) ....................11
Q-TEC Energy Recovery Ventilator (Option) ............11
Installation ..................................................................12
Basic Installation Design and Application Planning .. 12
Mounting the Unit ...............................................12
Condensate Drain ................................................14
Optional Rear Drain Kits ................................15
Indoor Ducted and Non-Ducted Applications ..........19
Indoor Supply Airflow ....................................19
Indoor Return Airflow ....................................19
Ducted Applications ......................................19
Free Blow Applications ..................................19
Thermostat or Indoor Temperature Sensor
Placement ...................................................19
Wiring - Main Power ............................................21
High Voltage Connections ..............................21
Wiring - Low Voltage ...........................................22
Low Voltage Connections ...............................22
Unit Shutdown Feature .................................22
Balanced Climate
Dehumidification Feature ..............................22
Ventilation Features ......................................22
Low Ambient Control .....................................22
Freeze Protection Thermostat ..................23
Start Up ........................................................................26
General ............................................................26
Topping Off System Charge ..................................26
Safety Practices ..................................................26
Vent Connection Plug ..........................................26
Pressure Service Ports .........................................26
Important Installer Notes .....................................27
Dehumidification Models ...............................27
Service Hints ......................................................27
High and Low Pressure Switches ..........................27
Pressure Switch Lockout ...............................27
Three Phase Scroll Compressor Start Up
Information ........................................................27
Compressor Control Module ..................................27
Over and Under Voltage Protection .................28
Intelligent Reset ...........................................28
Alarm Output ...............................................28
High Pressure Switch and Lockout Sequence ..28
Troubleshooting Compressor Logic CCM ..........28
High Pressure Switch .............................28
Manual 2100-752C
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Feature ...........................22
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Low Pressure Switch ..............................28
Freeze Stat Switch .................................28
Logic Control Board ................................29
Phase Monitor ....................................................29
Condenser Fan Operation .....................................29
Sequence of Operation ........................................29
Balanced Climate
Service .........................................................................31
Troubleshooting ECM 142R Outdoor Fan Motors ....... 31
Replacing the Motor .....................................32
Troubleshooting ECM Indoor Blower Motors ...........33
Replacing ECM Control Module ......................34
Fan Blade Setting Dimensions ..............................36
R-410A Refrigerant Charge ..................................36
Removal of Fan Shroud ........................................36
TABLES
Table 1 Wall Thermostats ...................................23
Table 2 Humidity Controls ..................................23
Table 3 CO Controllers ......................................23
2
Table 4 Thermostat Wire Size..............................23
Table 5 Troubleshooting ECM 142R Outdoor
Fan Motors ............................................32
Table 6 Troubleshooting ECM Blower Motors ........35
Table 7 Fan Blade Dimensions ............................36
Table 8A Cooling Pressure - Standard Airflow .........37
Table 8B Cooling Pressure - Balanced Climate
Airflow ..................................................37
Table 9 Electrical Specifications Q**A4D Series .... 38
Table 10 Indoor Blower Performance .....................39
Table 11 Maximum ESP Electric Heat Only ............39
Table 12 Electric Heat .........................................39
FIGURES
Figure 1 Air Seal Under Q-TEC Unit ........................6
Figure 2 Removal of Q-TEC Unit from Skid ..............6
Figure 3 Fan Assembly Removal .............................7
Figure 4 Q-TEC Unit on Appliance Cart ...................7
Figure 5 Installation with Duct-Free Plenum ............8
Figure 6 Ducted Application ..................................8
Figure 7 Supply Duct Connections ..........................9
Figure 8 Filter Location .........................................9
Figure 9 Filter Tabs in Up Position ........................10
Figure 10 Bend FIlter Tabs Down ...........................10
Figure 11 Fresh Air Damper Assembly ....................10
Figure 12 Remove Compressor Shipping Brackets ....12
Figure 13A Unit Mounting - Method 1 ......................13
Figure 13B Unit Mounting - Method 2 ......................13
Figure 14 Remove Locking Screws from Wheels .......14
Figure 15 Optional Side Drain (Side View) ...............14
Figure 16 Standard Rear Drain ...............................14
Figure 17 Rear Drain (Top View) .............................15
Figure 18A ............................................................16
Figure 18B ............................................................16
Figure 18C ............................................................17
Figure 18D ............................................................18
Figure 19 Unit Dimensions ....................................20
Figure 20 High Voltage Connections .......................21
Mode ..............................30
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