Install Instructions

Figure 17 Installing the propane gas oriﬁ ce (some details omitted for clarity)

Converting boiler to propane — EVG 155 (continued)

LEGEND for Figure 17 and Figure 18

1 Venturi (leave venturi attached to blower)

2 (3) hex-head screws, 5 mm hex (remove and retain)

3 Gas valve

4 Air silencer (leave connected to venturi)

5 Flexible gas line

6 Gas line to silencer bracket (rotate forward before disconnecting gas valve

from venturi

7 Propane oriﬁ ce (in propane conversion kit envelope)

8 Rubber grommet (must be installed in valve for all applications) — make

sure grommet is properly seated in valve before inserting the propane

oriﬁ ce

Figure 18 Gas valve and venturi

Part number 550-100-191/0917

gas-fired water boiler — 70/110/155 Boiler Manual

The jacket door must be in place during

operation.

DO NOT operate the boiler with the

jacket door removed except for inspection and

testing as directed in this manual.