Weil-McLain Aqua Balance WMB-155 Manual page 15

W
TM
AquaBalance
4 Converting boiler to propane
Figure 17
Gas pipe re-assembled to LP venturi fitting
A
3
Do not check for gas leaks with an open flame —
use bubble test. Failure to use bubble test or check
for gas leaks can cause severe personal injury,
death or substantial property damage.
6. Reinstall control module, reinstall screw to hold control
module securely in place
7. Reinstall jacket door, and secure with two (2) screws.
Mandatory control changes for fuel
conversion
8. Adjust parameter for the type of gas:
a. Put the boiler in standby mode.
b. Press the DHW buttons details 1 and 2 - Figure 76, page 60
for 10 seconds: the display shows "b01" flashing.
c. Press the DHW buttons Figure 76, page 60 details 1 and 2
- to set parameter 00 (for use with natural gas) or 01
(for use with LP).
d. Press the Heating (+) button to scroll to Parameter "b04".
e. Press DHW (-) to reduce the Maximum Blower
see Figure 123, page 97.
f. Press the (+) button to scroll to Parameter "b05".
g. Repeat Step "e" above according to your boiler size.
h. Press the Heating (+) button to scroll to Parameter
"b06".
i. Press DHW (-) to reduce the Minimum Fan Speed,
see Figure 123, page 97:
j. Press the DHW buttons details 1 and 2 -
Figure 76, page 60 for 10 seconds.
k. The boiler will return to standby mode.
9. Turn on gas by opening gas valve, check for leaks and con-
tinue boiler start up and adjustments, staring on page 77.
10. Test ignition system safety shutoff, see page 78.
11. In USA Input rates are derated 4% for each 1000 ft. above
sea level, beyond 2000 ft. in accordance with National Fuel
Gas Code, ANSI Z223.1/NFPA 54 - latest edition, and/or
the Natural Gas and Propane Installation Code, CAN/CSA
B149.1.
Part number 550-100-305/0118
M -
ALL OUNT GAS FIRED WATER BOILER
5
—
Boiler Manual
continued
12. Using a combustion analyzer insert probe into the flue
test point, check that the CO
the boiler operating at max. and min. firing rate, matches
that given in the technical data Figure 102, page 77 or Fig-
ure 105, page 78, for the corresponding type of gas.
DO NOT ATTEMPT TO MEASURE VALVE
OUTLET PRESSURE. The valve could be
damaged by manometer fluid contamination.
Failure to comply could result in severe personal
injury, death or substantial property damage.
Perform Boiler Manual start-up
Follow all instructions in Boiler Manual to start-up
the boiler after converting for propane. Because the
boiler has been changed, you must verify correct
operation, including checking combustion with
test instruments both at high fire and low fire as
described in the Boiler Manual, pages 76, 77 & 78.
Check the correct ignition sequence of the boiler
after the conversion, as in page 86.
Failure to comply could result in severe personal
injury, death or substantial property damage.
Reinstall boiler jacket front door
Replace boiler jacket front door after servicing. The
boiler front door must be securely fastened to the
boiler frame to prevent boiler from drawing air
from inside the boiler room. This is particularly
important if the boiler is located in the same
room as other appliances. Failure to keep the door
securely fastened could result in severe personal
injury or death.
Apply installer conversion label
Converting to propane firing: After installation is complete,
1.
attach the propane conversion label (from kit) next to the
boiler rating label.
2. Contractor/installer is responsible for completing the in-
formation required on label (provided in kit) and attaching
installer conversion label next to the boiler rating label.
Figure 18
Installer conversion label
The jacket door must be in place during
operation.
the jacket door removed except for inspection
and testing as directed in this manual.
content in the exhaust, with
2
DO NOT operate the boiler with
15