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Part number 550-100-325/0419
11
AquaBalance
®
Series 2 Wall Mount Gas-fired Water Boiler – Boiler Manual
1. Contact propane gas supplier to size piping, tank and install
a 100% lockup gas pressure regulator, or to verify size and
condition of existing piping and equipment.
requirements
Adjust propane supply regulator provided by gas supplier for 13”
w.c. maximum pressure.
For natural gas or propane, the pressure required at gas valve
inlet pressure port (verify minimum gas pressure when all gas
appliances are in operation):
a. Maximum: 13” w.c. with no flow (lockup) or with boiler on.
b. Minimum: 3.5” w.c. gas pressure, with gas flowing (verify
during boiler startup, while boiler is at high fire).
c. Nominal gas pressure: 11.0” w.c.
2. Install 100% lockup gas pressure regulator in supply
line if inlet pressure can exceed 13” w.c. at any time.
Adjust lockup regulator for 13” w.c. maximum.
3. After connecting propane gas line to boiler, and BEFORE
operating, check gas pressure. If gas pressure is not in the
range above, close manual gas valve and contact gas supplier
to correct the problem before attempting to start or operate
the boiler.
Installing venturi —
— You must turn off
electrical supply to the boiler and close the external
manual gas shut-off valve to isolate the boiler during
conversion. Allow the boiler to cool if it has been
operating.
Following conversion of an installed boiler, follow
all instructions in this manual to start up the boiler
and verify operation of the boiler and all system
components.
The venturi(s) provided with the kit(s) are permanently marked
on labels to indicate gas type “NAT GAS” Natural gas or “LPG”
for Liquefied petroleum (propane) gas and supplier part number.
See Figure 7, page 10 for kit contents.
4 Converting boiler to propane continued
for Figure 11
1 Control module 2 Gas valve
Figure 8
Figure 9
Figure 10
Figure 11
1. Remove two (2) A screws on the bottom flange of front panel,
out and lift up to remove the front panel.
2. Remove the one (1) screw holding control module in place
Figure 11, rotate the control module.
1
2
A
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