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
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