Manual 2100-742B
Page
2 of 57
CONTENTS
Getting Other Information and Publications .........3
Q-TEC
TM
General Information .....................................4
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
TM
Feature ...........................21
Dehumidification
Feature ..............................21
Ventilation
Features ......................................21
Low Ambient Control .....................................22
Outdoor Temperature Switch and Freeze
Protection
Thermostat ............................22
Start Up ........................................................................26
General
............................................................26
Topping Off System Charge ..................................26
Safety Practices ..................................................26
Important Installer Notes .....................................26
High and Low Pressure Switches ..........................26
Three Phase Scroll Compressor Start Up
Information ........................................................27
Phase Monitor ....................................................27
Condenser Fan Operation .....................................27
Service Hints ......................................................27
Sequence of Operation ........................................27
Cooling ........................................................27
Heating .......................................................27
Balanced
Climate
TM
Mode ..............................28
Defrost Cycle ......................................................28
Low Pressure Switch Bypass Operation ...........30
High Pressure Switch Operation .....................30
Vent Connection Plug ..........................................30
Pressure Service Ports .........................................30
Service .........................................................................31
Solid State Heat Pump Control Troubleshooting
Procedure ...........................................................31
Checking Temperature Sensor Outside Unit
Circuit................................................................32
Troubleshooting ECM 142R Outdoor Fan Motors ....... 33
Replacing the Motor .....................................34
Troubleshooting ECM Indoor Blower Motors ...........35
Replacing ECM Control Module ......................36
Fan Blade Setting Dimensions ..............................38
R-410A Refrigerant Charge ..................................38
Removal of Fan Shroud ........................................38
Dehumidification Unit Instructions .......................46
Dehumidification Circuit ......................................46
Dehumidification Sequence of Operation ...............46
Balanced Climate Mode .......................................46
Electronic Expansion Valve ...................................46
Operation .....................................................46
EEV Instructions for Vacuuming,
Reclaiming and Charging Unit .......................46
Troubleshooting the Electronic Expansion
Valve ...........................................................47
Control
Board ........................................48
Electronic
Expansion
Valve ......................48
Relay in EEV Control Box ........................48
Stator
Coil .............................................48
Transducer
Sensor ..................................48
Thermistor
Sensor ..................................49
Heat Pump Circuit Diagrams ................................50
Q24HD Cooling and Dehumidification
Application Data .................................................51
Q30HD Cooling and Dehumidification
Application Data .................................................52
Q36HD Cooling and Dehumidification
Application Data .................................................53
Q43HD Cooling and Dehumidification
Application Data .................................................54
Q48HD Cooling and Dehumidification
Application Data .................................................55
TABLES
Table 1
Wall Thermostats ...................................23
Table 2
Humidity Controls ..................................23
Table 3
CO
2
Controllers ......................................23
Table 4
Thermostat Wire Size..............................23
Table 5
Troubleshooting .....................................31
Table 6
Temperature vs. Resistance .....................32
Table 7
Troubleshooting ECM 142R Outdoor
Fan Motors ............................................34
Table 8
Troubleshooting ECM Blower Motors ........37
Table 9
Fan Blade Dimensions ............................38
Table 10A
Cooling Pressure – Standard Airflow .........39
Table 10B
Heating Pressure – Standard Airflow ........39
Table 11
Cooling Pressure – Balanced Climate
Airflow ..................................................40
Table 12
Electrical Specifications Q**H4 Series ...... 41
Table 13
Indoor Blower Performance .....................42
Table 14
Maximum ESP Electric Heat Only ............42
Table 15
Electric Heat .........................................42
