WARNINGS 4
Pay Attention to These Terms 4
BEFORE INSTALLATION 5
Product Receipt 5
Model Identification 5
Ratings and Certifications 5
Installations at Elevation 5
Component Locations 6
General Information 7
GENERAL SAFETY 8
Time/Temperature Relationships in Scalds 8
INSTALLATION 9
Installation Codes 9
Equipment Base 9
Clearances 9
Combustion and Ventilation Air 11
Conventional Combustion
Air Supply 11
Water Piping 12
Hydronic Heating 14
Domestic Hot Water Piping 16
Gas Supply 17
Electrical Power Connections 18
Venting 21
Outdoor Installation 31
CONTROLS 32
Ignition Control Module 32
Outdoor Air Reset Temperature Controller
(Standard for HD101-HD301 Type H) 32
Digital Temperature Control (Optional) 34
High Limit (Manual Reset) 34
High Limit — Auto Reset (Optional) 34
Flow Switch 35
High and Low Gas Pressure Switches
(Optional) 35
Low Water Cut Off (Optional) 35
WIRING DIAGRAM—MODELS
HD101–HD151 TYPE WH 36
WIRING DIAGRAM—MODELS
HD101-HD151 TYPE H 37
WIRING DIAGRAM—MODELS HD201-
HD401 TYPE WH 38
WIRING DIAGRAM—MODELS
HD201-HD401 TYPE H 39
HD TROUBLESHOOTING 40
PRE-START-UP 41
Filling System-Heating Heaters 41
Domestic Hot Water Heaters 41
Inspect Venting System 41
Pre-Start-Up Check 41
INITIAL START-UP 41
Tools Needed 41
Preparation for Start-Up 41
Start-Up 42
Main Burner Adjustment 43
Gas Valve Adjustment 43
Gas Type Conversion on Valve 44
Safety Inspection 44
Follow-Up 44
POST START-UP CHECK 45
Air Filter Inspection/Removal 46
Heat Exchanger Removal 46
MAINTENANCE 47
Suggested Minimum Maintenance
Schedule 47
APPENDIX 48
Inside Combustion Air Contamination 48
Important Instructions for the
Commonwealth of Massachusetts 49
CONTENTS
3
Summary of Contents for HI DELTA HD401
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