Converting Boiler To Propane - Weil-McLain Aqua Balance WMB-155 Manual

W
TM
AquaBalance

4 Converting boiler to propane

Prepare boiler for propane
AquaBalance TM
80/120/155
Propane operation
boilers must be converted for pro-
ALL
pane operation.
Converting an existing natural gas-fired
boiler for propane — For a boiler already
installed, you must turn off gas supply, turn off
power and allow boiler to cool before proceed-
ing. You must also completely test the boiler after
conversion to verify performance and start up the
boiler following instructions beginning on page 74
of this manual.
Verify Conversion kit—See Figure 8.
LP gas venturi will have a black label and will be
clearly labeled "LPG".
Natural gas venturi will have a white label and
will be clearly labeled "NAT GAS".
Failure to comply could result in severe personal
injury, death or substantial property damage.
This conversion kit shall be installed by a qualified
service agency in accordance with the
manufacturer's instructions and all applicable codes
and requirements of the authority having jurisdiction.
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 loss of life. The qualified service
agency is responsible for the proper installation of this
kit. The installation is not proper and complete until
the operation of the converted appliance is checked as
specified in the manufacturer's instructions supplied
with the kit.
Figure 8 Natural and Liquefied Petroleum (Propane) gas
conversion kits
Boiler Model
WMB-80 NG
WMB-80 LP
WMB-120 NG
WMB-120 LP
WMB-155 NG
WMB-155 LP
12
M -
ALL OUNT GAS FIRED WATER BOILER
(if required)
Kit Part Number
640-000-022
640-000-024
640-000-023
640-000-025
640-000-082
640-000-083
—
Boiler Manual
Natural to LP Conversion Kit Part Numbers
WMB-80 LP P/N 640-000-024 NG to Propane Gas Conv. Kit contents:
Venturi - 10.6 GPL
Gasket Nitrile Rubber 167 x 63.5X3.53 NBR
Label Gas Conversion
Label WMB-80 Rating Plate Conversion LP
Instructions Conversion Nat to LP Gas
WMB-120 LP P/N 640-000-025 NG to Propane Gas Conv. Kit contents:
Venturi - 12.6 GPL
Gasket Nitrile Rubber 167 x 63.5X3.53 NBR
Label Gas Conversion
Label WMB-120 Rating Plate Conversion LP
Instructions Conversion Nat to LP Gas
WMB-155 LP P/N 640-000-083 NG to Propane Gas Conv. Kit contents:
Venturi - 16.6 GPL
Gasket Nitrile Rubber 167 x 63.5X3.53 NBR
Label Gas Conversion
Label WMB-155 Rating Plate Conversion LP
Instructions Conversion Nat to LP Gas
LP to Natural Conversion Kit Part Numbers
WMB-80 NG P/N 640-000-022 LP to Natural Gas Conv. Kit contents:
Venturi - Natural Gas 10.6m
Gasket Nitrile Rubber 167 x 63.5X3.53 NBR
Label Gas Conversion
Label WMB-80 Rating Plate Conversion NG
Instructions Conversion LP to Natural Gas
WMB-120 NG P/N 640-000-023 LP to Natural Gas Conv. Kit contents:
Venturi - Natural Gas 12.6m
Gasket Nitrile Rubber 167 x 63.5X3.53 NBR
Label Gas Conversion
Label WMB-120 Rating Plate Conversion NG
Instructions Conversion LP to Natural Gas
WMB-155 NG P/N 640-000-082 LP to Natural Gas Conv. Kit contents:
Venturi - Natural Gas 16.6m
Gasket Nitrile Rubber 167 x 63.5X3.53 NBR
Label Gas Conversion
Label WMB-155 Rating Plate Conversion NG
Instructions Conversion LP to Natural Gas
• Follow all instructions in proper order.
• Do not tamper with venturi. DO NOT change or modify
venturi in any way.
• Do not leave an uninstalled venturi in the building.
• Caution the gas supply shall be shut off prior to discon-
necting the electrical power, before proceeding with the
conversion.
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
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Part number 550-100-305/0118