Laars MFTHW199 - Page 40

LAARS Heating Systems
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www.Laars.com Litho in U.S.A. © Laars Heating Systems 1607 Document 4296B
800.900.9276 • Fax 800.559.1583 (Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 (Applications Engineering)
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
www.Laars.com
Document 4296B
M ascot FT, Heating Only, Gas Conversion Kit
pg 2 of 4
BLOWER
GAS
VALVE
GAS
VALVE
COMBUSTION
TEST PORT
COMBUSTION
TEST PORT
COVER
BLOWER
COVER
GAS
INLET PIPE
GAS
INLET PIPE
( MFTHW 80/100120/140 ) ( MFTHW 199 )
Figure A
( MFTHW 80/100/120/140 ) ( MFTHW
199 )
BRASS FITTINGS
NOZZLE
BRASS FITTINGS
PACKING
PACKING
ORIFICE
3.
Using a Phillips screwdriver, remove the 4 screws on the front cover. See Figure A.
4.
Locate the Gas Inlet Pipe at the top of the unit as is shown in Figure A, and loosen the Brass Fittings at both ends
of the Gas Inlet Pipe.
5.
Completely un-thread the Brass Fittings at the blower end of the Gas Inlet Pipe, and then carefully swing the Gas
Inlet Pipe to the left, just enough so that it is out of the way. See Figure B.
6.
Remove the existing Natural Gas Nozzle (or Orifi ce). Save the Packing for re-use.
7.
Replace the old Nozzle (or Orifi ce) with the new one for LP (propane). Re-use the Packing from previous.
8.
Return the Gas Inlet Pipe to its original position and tighten both of the Brass Fittings.
Figure B
Flat Side
Inward
4.13 Natural Gas to Propane Conversion (continued)