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Part number 550-100-260/0520
16
ECO
®
Tec
GAS-FIRED WATER BOILER – 80/110/150/199 BOILER MANUAL
Gas conversions (continued)
Gas pipe swivel nut loosened for propane conversion
(silencer removed)
Gas valve separated from venturi (Note - fiber washer
location)
when loosening swivel nut at
venturi, using pipe wrench on gas pipe (Item 6)
to prevent the gas pipe connection from turning.
Failure to support the gas connection pipe to
prevent it from turning could damage gas line
components.
Label wires before removing
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
7. Disconnect wire harness from gas valve.
8. Loosen swivel nut (Figure 14, Item 7) on venturi-gas valve
connection (Item 6). See Figure 14. Gently set gas valve aside.
9. Remove three (3) T20 Torx screws holding the venturi, (Item
3) in place. Remove venturi, change o-ring (Item 9), change
fiber washer (Item 8) and inspect blower surface. Discard old
o-ring and fiber washer, see Figure 16.
10. Install new propane venturi and o-ring from conversion kit.
11. Ensure o-ring (Item 9) is seated properly in groove on blower.
12. Insert three (3) new Torx screws from conversion kit to hold
venturi in place. Torque screws to no more than 23 inch-
pounds.
13. Install LP orifice (Item 10) into venturi gas inlet, see Figure 17.
14. Reassemble gas pipe with new fiber washer(Item 8) from
conversion kit to the venturi connection, using two wrenches to
tighten swivel nut. Change silencer gasket (Item 130, page 143)
and re-attach air silencer to venturi. See Figure 13, page 15.
15. Replace silencer clip locking silencer to venturi. Ensure
silencer clip is seated on the silencer/venturi correctly.
Inspect the gas pipe fitting connections on the gas
valve and new venturi (Item 3, Figure 17, page 16).
Check the seal of the connections. Failure to
comply will cause a gas leak, resulting in severe
personal injury or death.
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.
Installing the new propane gas orifice.
4
7
3
6
5
Venturi removed from blower
7
8
3
9
5
7 8
10
3
85 7
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