Raypak 302B-902B - Manual (Page 3)

WARNINGS 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
Stacking 9
Clearances 10
Combustion and Ventilation Air 12
Conventional Combustion Air Supply 13
Water Piping 14
Hydronic Heating 16
Gas Supply 20
Electrical Power Connections 22
Field Wiring Connection 23
Venting 25
Changing the Flue Outlet 27
Venting Installation Tips 28
Venting Configurations 28
Controls 33
Outdoor Installation 33
Heater Sequence of Operations 34
87%-Efficiency Boilers –
Special Instructions 39
Water Piping 39
Wiring Diagram 44
START-UP 45
Pre Start-up 45
Start-Up 46
OPERATION 49
Lighting Instructions 49
To Turn Off Gas To Appliance 49
TROUBLESHOOTING 50
MAINTENANCE 51
Suggested Minimum
Maintenance Schedule 51
Preventative Maintenance Schedule 51
APPENDIX 53
Inside Air Contamination 53
WARRANTIES 54
Type H and WH 54
Type P 55
Start-Up Checklist 57
Important Instructions for the
Commonwealth of
Massachusetts 58
CONTENTS
3