Table Of Contents - Bard Q-TEC Q24H3DA Installation Instructions Manual

CONTENTS
Getting Other Information and Publications ......... 3
Q-TEC Series General Information ............................ 4
Q-TEC Model Nomenclature ...................................... 4
Shipping Damage ..................................................... 7
Unit Removal from Skid ............................................ 7
Handling Unit After Removal from Skid ...................... 8
General ................................................................... 8
Minimum Installation Height ..................................... 8
Duct Work.............................................................. 10
Filters ................................................................... 10
Fresh Air Intake ..................................................... 11
Service Light .......................................................... 11
Condensate Drain ................................................... 11
Optional Rear Drain Kits ......................................... 11
Installation .................................................................. 18
Mounting the Unit .................................................. 18
Wiring - Main Power .............................................. 19
Wiring - Low Voltage .............................................. 19
Optional Climate Controls Sequence of Operation ...... 19
Low Voltage Connections ......................................... 20
General ................................................................. 21
Figures
Figure 1 Unit Dimensions ....................................... 6
Figure 2 Air Seal Under Q-TEC Unit ......................... 7
Figure 3 Removal of Unit from Skid ......................... 7
Figure 4 Unit on Appliance Cart .............................. 8
Figure 5 Installation with Duct Free Plenum ............. 9
Figure 6 Ducted Application .................................... 9
Figure 7 Supply Duct Connections ......................... 10
Figure 8 Filter Location ........................................ 10
Figure 9 Optional Side Drain (Side View) ................ 12
Figure 10 Standard Rear Drain ................................ 12
Figure 11 Rear Drain (Top View) .............................. 12
Figure 12A Optional Rear Drain Kit............................ 13
Figure 12B Optional Rear Drain Kit............................ 14
Figure 12C Optional Rear Drain Kit............................ 15
Figure 12D Optional Rear Drain Kit............................ 16
Figure 13A Unit Mounting - Method 1 ....................... 17
Figure 13B Unit Mounting - Method 2 ....................... 17
Figure 14 Removing Locking Screws from Wheels ..... 18
Figure 15 Component Location ................................ 19
Figure 16 Thermostat Plug Terminals ....................... 21
Figure 17 Thermostat Wiring Diagram "X" Option ...... 22
Figure 18 T-Stat Diagram "X" Opt. & Demand Vent. ....... 23
Figure 19 Thermostat Wiring Diagram "E" Option ..... 24
Figure 20 T-Stat Wiring Diagram "I" Option .............. 25
Figure 21 T-Stat Wiring Diagram "J or K" Opt. ......... 26
Figure 22 Fresh Air Damper Removal ....................... 31
Figure 23 QERV Removal ........................................ 32
Figure 24 CO Controller ......................................... 33
2
Manual 2100-653
Page 2 of 44
S
tart Up ........................................................................ 27
R-410A Refrigerant: General ................................... 27
Topping Off System Charge ..................................... 27
Safety Practices ..................................................... 27
Description of Standard Equipment .......................... 28
Optional CFM (Q36H3D, Q43H3D, Q48H3D
and Q60H3D Only) ................................................... 28
Important Installer Note .......................................... 28
Phase Monitor ........................................................ 28
Three Phase Scroll Compressor Start Up Information . 28
Service Hints ......................................................... 29
Mist Eliminator Service ........................................... 29
Vent Options .......................................................... 30
Sequence of Operation ............................................ 33
Refrigerant Tube Schematic for Reheat Coil .............. 34
Pressure Service Ports ............................................ 35
Defrost Cycle ......................................................... 36
Troubleshooting ......................................................... 38
Solid State Heat Pump Control ................................ 38
Checking Temperature Sensor .................................. 39
Troubleshooting ECM™ Blower Motors ..................... 40
Fan Blade Setting Dimensions ................................. 42
R-410A Refrigerant Charge ..................................... 42
Figure 25 Q-TEC Dehum. Mode Circuit Diagram........ 34
Figure 26 Q-TEC Cooling Mode Circuit Diagram ........ 35
Figure 27 Defrost Control Board .............................. 37
Figure 28 Control Disassembly ................................ 41
Figure 29 Winding Test ........................................... 41
Figure 30 Drip Loop ............................................... 41
Figure 31 Fan Blade Setting ................................... 42
Tables
Table 1 Factory 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 Temp. Sensor ......... 39
Table 7 Fan Blade Dimensions .............................. 42
Table 8 Subcooling at Liquid Line ......................... 42
Table 9 Indoor Blower Performance ....................... 42
Table 10 Cooling Pressure ...................................... 43
Table 11 Heating Pressure ...................................... 44
Table 12 Dehum. Relay Logic Board ........................ 44