Bard WH423 - Default Chapter; Table of Contents

Manual 2100-487
Page 2 of 23
CONTENTS
Getting Other Information and Publications
For more information, contact these publishers:...... 3
Wall Mount General Information
Heat Pump Wall Mount Model Nomenclature.......... 4
Shipping Damage .................................................... 7
General ............................................................... 7
Duct Work ............................................................... 7
Filters ............................................................... 7
Fresh Air Intake ....................................................... 8
Condensate Drain.................................................... 8
Installation Instructions
Wall Mounting Information ....................................... 9
Mounting the Unit .................................................... 9
Typical Installations ................................................. 9
Wiring – Main Power ........................................... 13
Wiring – Low Voltage Wiring ............................... 13
Optional Outdoor Thermostat Applications ............ 14
Electric Heat Hold-Off ............................................ 15
Start Up
Important Installer Note ......................................... 16
Crankcase Heaters ................................................ 16
High Pressure Switch ............................................ 16
Three Phase Scroll Compressor Start Up
Information............................................................. 16
Phase Monitor ....................................................... 17
Service Hints ......................................................... 17
Sequence of Operation.......................................... 17
Pressure Service Ports .......................................... 17
Defrost Cycle .................................................... 17-18
Troubleshooting
Solid State Heat Pump Control
Troubleshooting Procedure ................................... 19
Checking Temperature Sensor Outdoor
Unit Circuit ............................................................. 20
Fan Blade Setting Dimensions .............................. 21
Removal of Fan Shroud......................................... 21
Refrigerant Charge ................................................ 21
Pressure Chart ................................................. 22-23
Optional Accessories ............................................. 23
Figures
Figure 1 Unit Dimensions..................................... 5
Figure 2 Blower Damper Assembly...................... 8
Figure 3 Mounting Instructions........................... 10
Figure 3A Electric Heat Clearance ....................... 10
Figure 4 Wall-Mounting Instructions ...................11
Figure 5 Wall-Mounting Instructions ...................11
Figure 6 Common Wall-Mounting Instructions ... 12
Figure 7 Unit 24V Terminal Board ...................... 13
Figure 8 Compressor Cutoff Thermostat
Wiring .................................................. 14
Figure 9 Compressor Cutoff Thermostat
Wiring .................................................. 14
Figure 10 Electric Heat Hold-Off Wiring............... 15
Figure 11 Electric Heat Hold-Off Wiring............... 15
Figure 12 Start-Up Label ...................................... 16
Figure 13 Defrost Control Board .......................... 18
Figure 14 Fan Blade Setting ................................ 21
Tables
Table 1 Electric Heat Table ................................. 4
Table 2 Electrical Specifications ......................... 6
Table 3 Thermostat Wire Size .......................... 14
Table 4 Wall Thermostat................................... 15
Table 5 Troubleshooting ................................... 19
Table 6 Fan Blade Dimensions......................... 21
Table 7 Suction Line Temperatures .................. 21
Table 8 Recommended Operating Ranges ...... 21
Table 9 Indoor Blower Performance ................. 21
Table 10 Maximum ESP of Operation ................ 22
Table 11 Cooling Pressures ............................... 22
Table 12 Heating Pressures ............................... 23
Table 13 Optional Accessories ........................... 23