Weil-McLain WM97+70 Specifications download pdf (Page 15)

Part number 550-142-120/0113

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WM97+ gas-fired water boiler — Boiler Manual

Figure 10 Installing the propane gas oriﬁce bushing (some details omitted for clarity)

Converting boiler to propane — WM97+70/110 (cont.)

7. See Figure 10. Insert the propane gas oriﬁce bushing (item 4) into

the gas valve outlet as shown.

8. Press the bushing into the gas valve outlet until the bushing ﬂange

butts against the gas valve outlet.

Inspect the O-rings on the propane gas oriﬁce bushing

an on the gas valve outlet (item 5, Figure 10). The O-

rings must be in good condition and must be installed.

Failure to comply will cause a gas leak, resulting in severe

personal injury or death.

9. Reposition gas valve into the venturi and reinstall the gas valve

retention ring (item 3, Figure 10).

DO NOT ATTEMPT TO MEASURE VALVE OUTLET

PRESSURE.

The valve could be damaged by manom-

eter ﬂuid contamination. Failure to comply could result

in severe personal injury, death or substantial property

damage.

10. After installation is complete, attach the propane conversion label

(in conversion kit bag) next to the boiler rating plate.

11. Perform complete start-up sequence (beginning on page 87),

including check for gas leaks and checking for proper operation.

12. Reinstall jacket front panel.

LEGEND for Figure 10

1 Gas valve

2 Venturi

3 Gas valve retention ring

4 Propane oriﬁce bushing with o-ring

5 Gas valve o-ring

6 Pressure reference hose — LEAVE CONNECTED AT

BOTH ENDS

The jacket door must be in place

during operation.

DO NOT oper-

ate the boiler with the jacket door

removed except for inspection and

testing as directed in this manual.

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Weil-McLain WM97+70 Specifications Page 15