110331-01 - 5/20
• Combi Boiler/Water Heater
• Condensing
• Direct Vent
• Gas Fired
Model: PHTM2136C
WARNING
This boiler must only be installed, serviced, or repaired by a qualified heating installer or service technician.
Improper installation, adjustment, alteration, service or maintenance can cause severe personal injury, death,
or substantial property damage. For assistance or additional information, consult a qualified installer, service
agency, or the gas supplier. Read these instruction carefully before installing.
!
Installation, Operating and Service Instructions for
Manual Contents Page
1. Installer Read Before Proceeding .............3
2. Homeowner Read Before Proceeding .........4
3. Specifications ............................5
4. How It Works. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5. Locating Boiler ...........................9
6. Preparing Boiler ..........................13
7. General Venting ..........................16
8. Sidewall Direct Venting ....................23
9. Vertical Direct Venting .....................29
10. Heating System Piping ...................35
11. Domestic Water Piping ....................38
12. Gas Piping .............................41
13. Field Wiring .............................42
14. Condensate Disposal ....................45
15. Start-up and Checkout ..................46
LP Conversion
16. Operation ..............................52
17. Before Leaving Jobsite ...................64
18. Service and Maintenance .................65
19. Troubleshooting .........................69
20. Internal Wiring Diagrams ..................83
21. Service Parts ...........................86
Appendix
A. Combination Refrigeration/Heating System ..92
B. Water Quality and Boiler Additives .........93
C. Special Requirements In Massachusetts ....94
D. Code Required Text ......................96
TO THE INSTALLER:
Affix these instructions adjacent to boiler.
Provide model number and serial number when
seeking information and support.
TO THE HOMEOWNER:
Retain these instructions for future reference.
Contact heating installer or technician for all issues
and support.
VELOCITY LOGO CMYK COLORS
II
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