Weil-McLain Aqua Balance WMB-155 Manual page 14

W
TM
AquaBalance
4 Converting boiler to propane
3. Loosen the bottom swivel nut of gas pipe and unscrew the
top swivel nut "A" Figure 13, Item 3 from the gas valve venturi
Figure 13, Item 6.
Figure 13
Loosen fittings of gas pipe (Control module
removed for clarity)
3
2
Figure 14
Gas valve venturi replacement for propane
conversion
5
8
4
A
4. Remove three (3) Hex head screws holding the venturi,
Item 5 in place, remove venturi, replace with new propane
venturi from kit. Verify the venturi label information
matches the boiler size WMB-80/120/155. (Propane ven-
turi has black label), ensure Item 7, venturi "O" ring is in
place (see Figure 15), re-insert three (3) Hex head screws
to hold new venturi, tighten to hold securely in place.
14
M -
ALL OUNT GAS FIRED WATER BOILER
6
A
6
3
—
Boiler Manual
continued
LEGEND for Figures 13, 14, 15. 16 and 17
1
Control panel (page 13)
2 Gas valve (page 14)
3 Gas pipe
4 Washer
Figure 15
Insure "O" ring is in place
5. Reassemble gas pipe and new washer to the venturi fitting,
re-connect nut "A" and gas pipe "Item 3" to venturi and
check the seal of the connection.
Inspect the gas pipe fitting connections on
the gas valve and new venturi (Item 3, Fig-
ure 13, page 14) check the seal of the connec-
tions. Failure to comply will cause a gas leak,
resulting in severe personal injury or death.
Figure 16 New LP venturi installed to blower
5
4
5
Hex head screws
6 Gas valve venturi
7 "O" Ring
8 Blower
7
3
Part number 550-100-305/0118