Weil-McLain AQUABALANCE HEAT-ONLYAB-120H Series 2 High-efficiency Gas Water Boiler

User Manual - Page 12

For AQUABALANCE HEAT-ONLYAB-120H.

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Part number 550-100-325/0419
12
AquaBalance
®
Series 2 Wall Mount Gas-fired Water Boiler Boiler Manual
3. Loosen the bottom swivel nut of gas pipe and unscrew the
top swivel nut A Figure 12, Item 3 from the gas valve venturi
Figure 12, Item 6.
Figure 12 

Figure 13 

4 Converting boiler to propane continued
฀for Figures 12, 13, 14, 15 and 16
1 Control panel (page 13)
2 Gas valve
3 Gas pipe
4 Washer
5 Hex head screws
6 Gas valve venturi
7 “O Ring
8 Blower
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 AB-80/120/155. (Propane venturi
has black label), ensure Item 7, venturi “O” ring is in place
(see Figure 14), re-insert three (3) Hex head screws to
hold new venturi, tighten to hold securely 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 12, page 12) check the seal of the connec-
tions. Failure to comply will cause a gas leak,
resulting in severe personal injury or death.
Figure 14

Figure 15


A
3
6
2
7
4
3
5
8
A
6
3
4
5
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