Table of Contents
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1. WARNINGS ............................................................. 4
Pay Attention to These Terms ................................. 4
2. WATER CHEMISTRY ............................................. 5
3. BEFORE INSTALLATION ...................................... 6
Receiving equipment............................................... 6
Rating and certifications .......................................... 6
Elevation ................................................................. 6
Ambient Temperature Rating .................................. 6
4. INSTALLATION ....................................................... 7
Installation Codes.................................................... 7
Clearances .............................................................. 7
Outdoor Heater Installation ..................................... 8
Combustion and Ventilation Air ............................. 11
Vent Piping ............................................................ 13
D-2 Power Vent Kit ................................................ 13
Gas Supply Connections....................................... 14
Flow Rate .............................................................. 15
ProTek Shield Assembly........................................ 16
Unitherm Governor Operation ............................... 17
Internal Automatic Bypass Valve ........................... 17
External Auxiliary Bypass Valve ............................ 17
Auxiliary Bypass Valve Adjustment ....................... 17
Pressure Relief Valve Installation .......................... 18
Heat Exchanger Reversal ..................................... 18
Plumbing Diagrams ............................................... 19
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5. ELECTRICAL WIRING ......................................... 20
Electrical Power Draw ........................................... 20
Transformer Wiring ............................................... 21
6. WIRING DIAGRAM ............................................... 22
7. CONTROLS ........................................................... 23
Control Panel Removal ......................................... 23
Control Adjustments .............................................. 23
Operation .............................................................. 24
Status and Diagnostics ......................................... 26
Remote Control Wiring .......................................... 27
8. OPERATING INSTRUCTIONS ............................ 32
Before Start-Up ..................................................... 32
Start-Up Procedures ............................................. 32
Visual inspection ................................................... 32
Water Flow Switch ................................................ 32
9. MAINTENANCE AND CARE ............................... 34
Cold Weather Operation ....................................... 34
10. TROUBLESHOOTING ......................................... 35
Flow Chart ............................................................. 36
Control Logic - Flow Chart ................................... 37
11. REPLACEMENT PARTS ..................................... 38
12. ILLUSTRATED PARTS LIST .............................. 39
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