Lochinvar HERALD HCB116CE, Installation Manual

Page: 63 / 92

63
If the boiler is already installed and operational, you must turn off the gas supply, turn off the power supply and allow
the boiler to cool before proceeding. The conversion procedure is as follows:
18.2.2 HCB46CE – HCB86CE
1. Remove the top and front access covers from the unit (no tools required for removal).
2. Remove the impulse tube and wiring plug from the gas valve.
3. Remove the three cap-head screws securing the gas valve to the venturi (see CONVERSION PROCEDURE
HCB46CE – HCB86CE).
4. Locate the propane orifice disk from the conversion kit bag. Verify that the stamping on the orifice disk is
correct for the boiler (
see LPG ORIFICE MARKINGS).
5. Place the orifice into the black rubber grommet in the side of the gas valve ensuring the orifice and grommet
are seated correctly (see CONVERSION PROCEDURE HCB46CE – HCB86CE).
6. Reposition the gas valve against the venturi and replace the cap-head screws (see CONVERSION
PROCEDURE HCB46CE – HCB86CE).securing the valve to the venturi.
7. Refit the impulse tube and wiring plug to the gas valve.
8. After installation is complete, attach the propane conversion label (in the conversion kit bag) next to the boiler
rating plate. Attach the LPG caution label (in the conversion kit bag) to the left side of the unit in the lower
left corner.
9. Replace the top and front access covers.
18.2.3 CONVERSION PROCEDURE HCB46CE – HCB86CE