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Appendix A
•
If installing APX525C or APX725C: Do not convert APX525C to LP gas (propane) at altitudes above 6,000
ft. Also, do not install APX725C LP gas (propane) at altitudes above 7,800 ft. Attempts to do so may result
in unreliable operation, property damage, personal injury or death due to carbon monoxide (CO air free)
poisoning.
•
LP Conversions - Apex boiler setup from factory is configured for use with natural gas installed from 0 - 2,000
ft above sea level only. For APX425C or APX525C conversion to LP at altitude above 2,000 ft., follow these
instructions as specific instructions must be followed when converting for use with LP. If the information in
these instructions is not followed exactly, a fire, an explosion or production of carbon monoxide may result
causing property damage, personal injury or death. The qualified service agency is responsible for proper
installation of this boiler for use with LP gas. The installation is not proper and complete until the operation of the
converted appliance is checked as specified in the manufacturer's instructions supplied. APX625C, APX725C
and APX825C are factory shipped as either natural gas build or LP gas build. Field conversions of APX625C,
APX725C and APX825C are not permitted.
•
Failure to set up the Boiler in accordance with these instructions could result in high amount of Carbon Monoxide
to be produced which could result in death, serious injury, and/or reduced component life.
These instructions apply only to the following Apex boiler configurations: 2,001 ft.- 4,500 ft., 4,501 ft- 6000 ft., 6,001
ft.- 7,800 ft., 7,801 ft. - 10,000 ft.
These instructions contain specific instructions to properly set up your boiler to ensure proper operation.
These instructions include a procedure for adjusting the air-fuel mixture on this boiler. This procedure requires
a combustion analyzer to measure the CO
Adjusting the air-fuel mixture without a proper combustion analyzer could result in unreliable boiler operation,
personal injury, or death due to carbon monoxide poisoning.
Adjusting Boiler Type (must be completed first)
Select the correct Apex boiler size and altitude range
using the touch screen display as follows:
1. Check boiler's label for actual boiler size.
2. Confirm installation altitude
3. Power up the boiler. Display will show the
Home screen.
4. Press main menu on home screen.
5. Press Adjust.
150
Instructions for High Altitude Installations Above 2,000 ft.
(or Oxygen) and Carbon Monoxide (CO air free) levels in flue gas.
2
Figure A-1: Boiler Model (Boiler Type) Decoding
APEX
Installation, Operating, & Service Instructions
!
WARNING
!
DANGER
6. Press Modulation.
7. Press Lock. Enter password "86" and select
enter.
8. Press Boiler Model.
9. Press Adjust on Boiler Type screen.
10. Use the ↓ ↑ arrows to select the correct size and
altitude of your boiler. Press the
enter your selection. See Figure
11. Press "Confirm" until display stops blinking.
12. Press return arrow to go back to home screen.
button to
10-19.
106308-05 - 3/23
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