Table of Contents
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1. WARNINGS ..................................................PAGE 4
Pay Attention to These Terms ........................ page 4
2. WATER CHEMISTRY ..................................PAGE 5
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3. BEFORE INSTALLATION ...........................PAGE 6
Receiving equipment...................................... page 6
Rating and certifications ................................. page 6
Elevation ........................................................ page 6
Ambient Temperature Rating ......................... page 6
4. INSTALLATION ............................................PAGE 7
Installation Codes........................................... page 7
Clearances ..................................................... page 7
Outdoor Heater Installation ............................ page 8
Combustion and Ventilation Air .................... page 11
Vent Piping ................................................... page 13
D-2 Power Vent Kit ....................................... page 13
Gas Supply Connections.............................. page 14
Flow Rate ..................................................... page 15
ProTek Shield Assembly............................... page 16
Unitherm Governor Operation ...................... page 17
Internal Automatic Bypass Valve .................. page 17
External Auxiliary Bypass Valve ................... page 17
Auxiliary Bypass Valve Adjustment .............. page 17
Pressure Relief Valve Installation ................. page 18
Heat Exchanger Reversal ............................ page 18
Plumbing Diagrams ...................................... page 19
TABLE OF CONTENTS
5. ELECTRICAL WIRING ..............................PAGE 20
Electrical Power Draw .................................. page 20
Transformer Wiring ...................................... page 21
6. WIRING DIAGRAM ....................................PAGE 22
7. CONTROLS ................................................PAGE 23
Control Panel Removal ................................ page 23
Control Adjustments ..................................... page 23
Operation ..................................................... page 24
Status and Diagnostics ................................ page 26
High Limit Event ........................................... page 26
Remote Control Wiring ................................. page 27
8. OPERATING INSTRUCTIONS .................PAGE 32
Before Start-Up ............................................ page 32
Start-Up Procedures .................................... page 32
Visual inspection .......................................... page 32
Water Flow Switch ....................................... page 32
9. MAINTENANCE AND CARE ....................PAGE 34
Cold Weather Operation .............................. page 34
10. TROUBLESHOOTING ..............................PAGE 35
Flow Chart .................................................... page 37
Control Logic - Flow Chart .......................... page 38
11. REPLACEMENT PARTS ..........................PAGE 39
12. ILLUSTRATED PARTS LIST ...................PAGE 40
13. QR CODES ................................................PAGE 46
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Table of Contents
