Bard WG421, Installation Instructions Manual

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CONTENTS
Getting Other Information and Publications ...................... 1
WG Series Model Nomenclature ...................................... 2
Ventilation Options ............................................................ 2
Air Conditioning Module Options ...................................... 3
1. Important ..................................................................... 3
2. Application .................................................................. 3
3. Duct Work ................................................................... 3
4. High Altitude Applications .......................................... 6
5. Transportation Damage .............................................. 6
6. Installation ................................................................... 6
7. Wall Mounting ............................................................. 7
8. Mounting the Unit ....................................................... 7
9. Clearances ................................................................ 13
10. Vent Terminal and Combustion Inlet Hood ............... 13
11. Optional Vertical Venting .......................................... 13
12. Vent Resizing Instructions ........................................ 13
13. Fresh Air Intake ........................................................ 14
14. Condensate Drain ..................................................... 14
15. Wiring – Main Power ................................................ 14
16. Wiring – Low Voltage Wiring .................................... 16
17. Thermostats .............................................................. 16
18. Gas Supply & Piping ................................................ 19
19. Manifold Pressure Adjustment ................................. 20
20. Checking Gas Input Rate ......................................... 20
21. Standard Orifice Sizing & High Altitude Derate ....... 21
22. Conversion of Gas Input BTUH From High
to Low Rating ............................................................ 24
23. Measuring Air Temperature Rise .............................. 24
24. Filters ........................................................................ 25
25. Compressor Control Module ..................................... 25
26. Lighting & Shutdown Instructions ............................. 26
27. Service Agency Procedures ..................................... 27
28. Maintaining Unit in Good Working Order .................. 27
29. Replacement Parts ................................................... 28
30. Sequence of Operation – Heating ............................ 29
31. Sequence of Operation – Cooling ............................. 29
32. Indoor Blower Operation ........................................... 30
33. Pressure Service Ports ............................................. 36
34. Refrigerant Charge .................................................... 36
35. Fan Blade Setting Dimensions ................................. 37
36. Low NOx Burner Assembly "N" Suffix Models
Only – U.S. Installations Only .................................. 37
Wiring Diagrams ....................................................... 38 - 49
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