Raypak 337A Installation And Operation Manual

3
CONTENTS
1. WARNINGS ............................................................. 4
Pay Attention to These Terms ................................. 4
2. WATER CHEMISTRY ............................................. 5
Automatic Chlorinators and Chemical Feeders....... 5
3. BEFORE INSTALLATION ...................................... 6
Receiving equipment............................................... 6
Rating and certications .......................................... 6
Elevation ................................................................. 6
Ambient Temperature Rating .................................. 6
4. INSTALLATION ....................................................... 6
Installation Codes ................................................... 7
Clearances .............................................................. 7
Outdoor Heater Installation ..................................... 7
Combustion and Ventilation Air ............................... 9
Vent Piping ............................................................ 12
D-2 Power Vent Kit ................................................ 12
Gas Supply Connections....................................... 13
Flow Rates ............................................................ 14
ProTek Shield Assembly........................................ 15
Unitherm Governor Operation ............................... 16
Internal Automatic Bypass Valve ........................... 16
External Auxiliary Bypass Valve ............................17
Auxiliary Bypass Valve Adjustment ....................... 17
Pressure Relief Valve Installation .......................... 17
Plumbing Diagram................................................. 18
Heat Exchanger Reversal ..................................... 19
5. ELECTRICAL WIRING ......................................... 19
Electrical Power Draw ........................................... 20
Transformer Wiring ............................................... 20
6. WIRING DIAGRAM ............................................... 21
7. CONTROLS ........................................................... 22
Control Panel Removal ......................................... 22
Control Adjustments ............................................. 22
Operation .............................................................. 23
Status and Diagnostics ......................................... 25
Remote Control Installation and Operation ........... 26
Remote Control Wiring .......................................... 26
8. OPERATING INSTRUCTIONS ............................ 32
Before Start-Up ..................................................... 32
Start-Up Procedures ............................................. 32
9. MAINTENANCE AND CARE ............................... 34
Cold Weather Operation ....................................... 34
10. TROUBLESHOOTING ......................................... 35
Digital - Flow Chart................................................ 36
Control Logic - Flow Chart .................................... 37
11. REPLACEMENT PARTS ..................................... 38
12. ILLUSTRATED PARTS LIST .............................. 39
NOTE: ProTek Shield Adapter and assembly for ASME models shown in Figures, but not available until end of Q3 2020.

Raypak 337A Specifications

General

Brand	Raypak
Model	337A
Category	Gas Heater
Language	English