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Converting boiler to propane — ECO 155
Prepare boiler for propane —
ECO 155 only (if required)
Propane operation
!,,%#/BOILERSMUSTBECONVERTEDFORPRO-
PANEOPERATION
.
#ONVERTINGANEXISTINGNATURALGASlREDBOILER
FORPROPANE
— For a boiler already installed, you
must turn off gas supply, turn off power and allow
boiler to cool before proceeding. You must also
completely test the boiler after conversion to verify
performance and start up the boiler following in-
structions beginning on page 75 of this manual.
6ERIFYPROPANEGASORIlCESIZE — See Figure 13.
Verify when installing that the orifice size marking
is correct. Orifice will be stamped as in illustration.
Failure to comply could result in severe personal
injury, death or substantial property damage.
Installing propane orifice —
ECO 155 only
)FBOILERISALREADYINSTALLED — You must turn off elec-
trical supply to the boiler and close the external manual
gas shut-off valve to isolate the boiler during conversion.
Allow the boiler to cool if it has been operating.
Following conversion of an installed boiler, follow all
instructions in this manual to start up the boiler and
verify operation of the boiler and all system components.
1. Locate the propane orifice from the propane conversion kit bag.
2. Verify that the stamping on the orifice is correct for the model size
(see Figure 13).
3. If the jacket door is not already removed, remove it.
4. See Figure 14, page 16 and Figure 15, page 16 for the following.
5. Locate the gas valve and venturi (items 1 and 3).
6. Release the gas line to silencer bracket (item 6) from the gas line
and rotate it forward out of the way.
7. Use a 5-mm hex wrench to remove the three Allen screws (item 2)
that secure the gas valve to the venturi.
&IGURE Propane gas orifice identification
%#/ 155
8. See Figure 15, page 16. Carefully pull the gas valve to
the right until it is free of the venturi. Securely support
the gas valve — DO NOT leave it dangling.
3UPPORTTHEGASVALVEAFTERDISCONNECT-
INGFROMTHEVENTURI$/./4ALLOWITTO
HANGFROMTHEGASVALVEmEXLINE
When
re-attaching the gas valve, ensure the gas
valve grommet (item 8, Figure 15, page 16)
is in place and in good condition. Inspect
the gas valve flex line to ensure it is undam-
aged and in good condition.
9. Insert the propane gas orifice (item 7) into the gas valve
opening as shown in Figure 15, page 16.
10. Make sure that the rubber grommet (item 8) is firmly
seated in the gas valve opening.
When re-attaching the gas valve, ensure the
gas valve grommet (item 8, Figure 15, page 16)
is in place and in good condition. Failure to
comply will cause a gas leak, resulting in severe
personal injury or death.
11. Reposition gas valve onto the venturi and reinstall the
gas valve retention screws (item 2).
12. Swing the gas line to silencer bracket (item 6) back into
position and snap onto the gas line.
$/./4!44%-044/-%!352%6!,6%
/54,%4 02%3352%
The valve could be
damaged by manometer fluid contamina-
tion. Failure to comply could result in severe
personal injury, death or substantial property
damage.
13. After installation is complete, attach the propane con-
version label (in conversion kit bag) next to the boiler
rating plate.
Part number 550-142-122/0513
15
TM
GAS-FIRED WATER BOILER — Boiler Manual
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