Raypak 503-2003 - 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 6
GENERAL SAFETY 7
Time/Temperature Relationships in
Scalds
7
INSTALLATION 8
Installation Codes 8
Equipment Base 8
Clearances 8
Combustion and Ventilation Air 9
Conventional Combustion Air Supply 11
Water Piping 12
Hydronic Heating 14
Gas Supply 19
Electrical Power Connections 20
Field Wiring Connection 22
Venting 22
Venting Installation Tips 24
Venting Configurations 24
Outdoor Installation 29
Controls 30
Heater Sequence of Operation 36
WIRING DIAGRAMS 43
START-UP 45
Pre Start-up 45
Start-Up 46
OPERATION 49
Lighting Instructions 49
To Turn Off Gas To Appliance 50
TROUBLESHOOTING 51
UDB Fault History 52
MAINTENANCE 52
Suggested Minimum
Maintenance Schedule
52
Preventative Maintenance Schedule 53
APPENDIX 54
Inside Air Contamination 54
CONTENTS
3
IMPORTANT INSTRUCTIONS FOR
THE COMMONWEALTH OF
MASSACHUSETTS
55
WARRANTY 56