Table Of Contents - Bard Q24H2-A Installation Instructions Manual

CONTENTS
Getting Other Information and Publications
For more information, contact these publishers: ........... 3
Q-T General Information
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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 Instructions
Mounting the Unit ........................................................ 18
Wiring - Main Power .................................................. 19
Wiring - Low Voltage Wiring ...................................... 19
Opt. Climate Controls Seq. of Operation .................... 19
Low Voltage Connections ........................................... 20
Figures
Figure 1 Unit Dimensions ........................................... 6
Figure 2 Air Seal on Bottom of Unit ............................ 7
Figure 3 Removal of Unit From Skid .......................... 7
Figure 4 Unit on Appliance Cart for Moving................ 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 .................................... 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 17A T-Stat Wiring Diagram "X" Opt. .................. 22
Figure 17B T-Stat Wiring Diagram "X" Opt. w/Demand .... 23
Figure 18 T-Stat Wiring Diagram "D" Opt. ................. 24
Figure 19 T-Stat Wiring Diagram "H" Option ............. 25
Figure 20 T-Stat Wiring Diagram "B" or "C" Opt. ....... 26
Figure 21 Fresh Air Damper Removal ........................ 31
Figure 22 QERV Removal .......................................... 32
Figure 23 CO Controller ............................................ 33
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Figure 24 Defrost Control Board ................................ 35
Figure 25 Control Disassembly .................................. 39
Figure 26 Winding Test ............................................... 39
Figure 27 Drip Loop.................................................... 39
Figure 28 Fan Blade Setting....................................... 40
Manual 2100-601B
Page 2 of 42
S
tart Up
R-410A Refrigerant Required ......................................... 27
Topping Off System Charge ........................................... 27
Safety Practices.............................................................. 27
Description of Standard Equipment ................................ 28
Optional CFM (Q36, Q42, Q48 & Q60 Only) .................. 28
Important Installer Note .................................................. 28
Phase Monitor ................................................................ 28
Three Phase Scroll Compressor Start Up Info. ............. 28
Service Hints .................................................................. 29
Mist Eliminator Service ................................................... 29
Vent Options ................................................................... 30
Sequence of Operation................................................... 33
Pressure Service Ports ................................................... 34
Defrost Cycle .................................................................. 34
Troubleshooting
Solid State HP Control Troubleshooting Procedure ....... 36
Checking Temperature Sensor ....................................... 37
Troubleshooting ECM™ Blower Motors ....................38-39
Fan Blade Setting Dimensions ....................................... 40
Refrigerant Charge ......................................................... 40
Pressure Charts....................................................... 41 - 42
Tables
Table 1 Factory Built-In Electric Heat Table ............... 4
Table 2 Electrical Specifications................................. 5
Table 3 Operating Voltage Range ............................ 19
Table 4 Wall Thermostats ......................................... 21
Table 5 Troubleshooting ........................................... 36
Table 6 Temp. vs Resistance of Temp. Sensor ........ 37
Table 7 Fan Blade Dimensions ................................ 40
Table 8 Indoor Blower Performance......................... 40
Table 9 Cooling Pressure ......................................... 41
Table 10 Heating Pressure......................................... 42