110327-04 - 1/22
ALTA
• Combi Boiler/Water Heater
• Condensing
• Direct Vent
• Gas Fired
Models:
• ALTAC-136
• ALTAC-200
WARNING
This boiler must only be installed, serviced, or repaired by a qualified installer, service agency or gas supplier.
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 . . . . . . . .5
3. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4. How It Works . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
5. Locating Boiler . . . . . . . . . . . . . . . . . . . . . . . . .10
6. Preparing Boiler . . . . . . . . . . . . . . . . . . . . . . . .14
7. General Venting . . . . . . . . . . . . . . . . . . . . . . . . .17
8. Sidewall Direct Venting . . . . . . . . . . . . . . . . . . .24
9. Vertical Direct Venting . . . . . . . . . . . . . . . . . . .30
10. Heating System Piping . . . . . . . . . . . . . . . . . . .36
11. Domestic Water Piping . . . . . . . . . . . . . . . . . . .39
12. Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
13. Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
14. Condensate Disposal . . . . . . . . . . . . . . . . . . . .46
15. Start-up and Checkout . . . . . . . . . . . . . . . . . .47
16. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
17. Before Leaving Jobsite . . . . . . . . . . . . . . . . . .65
18. Service and Maintenance . . . . . . . . . . . . . . . . .66
19. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . .71
20. Internal Wiring Diagrams . . . . . . . . . . . . . . . . .86
21. Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . .89
Appendix
A. Combination Refrigeration/Heating System . .95
B. Water Quality and Boiler Additives . . . . . . . . .96
C. Special Requirements In Massachusetts . . . .97
D. Code Required Text . . . . . . . . . . . . . . . . . . . . . .99
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.
Version en Español disponible en el web del fabricante.
www.usboiler.net
