Table of Contents
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1. WARNINGS ............................................................. 4
Pay Attention to These Terms ................................. 4
2. GENERAL SAFETY ................................................ 5
Time/Temperature Relationships in Scalds ............. 5
3. BEFORE INSTALLATION ...................................... 6
Product Receipt....................................................... 6
Model Identification ................................................. 6
Ratings and Certifications ....................................... 6
Installations at Elevation ......................................... 6
Component Locations ............................................. 7
4. INSTALLATION ....................................................... 8
Installation Codes.................................................... 8
Equipment Base ...................................................... 8
Clearances .............................................................. 8
Combustion and Ventilation .................................. 11
Conventional Combustion Air Supply .................... 12
Water Piping .......................................................... 13
Hydronic Heating................................................... 15
Domestic Hot Water .............................................. 17
Gas Supply............................................................ 19
Electrical Power Connections ............................... 20
Field Wiring Connection ........................................ 22
Venting - General .................................................. 24
Venting Installation Tips ........................................ 26
Venting Configurations .......................................... 26
Vertical Venting (Category IV) ............................... 26
(Category IV) ............................................... 28
Direct Vent-Vertical ............................................ 30
Outdoor Installation ............................................... 30
CONTENTS
5. CONTROLS ........................................................... 31
Ignition Control Functions ..................................... 31
6. WIRING DIAGRAM ............................................... 40
7. START-UP .............................................................. 41
Pre Start-up ........................................................... 41
Pre Start-up Check................................................ 41
Initial Start-up ........................................................ 41
Preparation............................................................ 42
Start-Up ................................................................. 42
Blower Check ........................................................ 43
Post Start-Up Check ............................................. 45
8. OPERATION .......................................................... 46
Lighting Instructions .............................................. 46
To Turn Off Gas To Appliance ............................... 46
9. TROUBLESHOOTING ......................................... 46
MVB Error Codes .................................................. 46
Heater Errors......................................................... 46
Heater Faults......................................................... 46
MVB Fault Text ...................................................... 47
10. MAINTENANCE .................................................... 49
Suggested Minimum Maintenance Schedule ........ 49
Preventive Maintenance Schedule........................ 50
11. ILLUSTRATED PARTS LIST ............................... 52
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