9
208 Volt Conversion
1. Disconnect power.
2. Remove the burner access panel.
3. Move the black wire lead from the 240-volt terminal on the
transformer to the 208-volt terminal (center tap) on the
transformer. See the wiring connection diagrams in
“Troubleshooting.”
4. Replace the burner access panel.
High Altitude Conversion
(if required)
Ratings are shown on the rating plate for elevations up to
4,500 ft. For elevations above 4,500 ft, ratings should be reduced
at a rate of 4 percent for each 1,000 ft above sea level. See the
National Fuel Gas Code Z223.1 (latest edition) or the Canadian
Installation Codes CAN/CGA-B149.1 and B149.2 for further
details. Not recommended for over 10,000 ft.
Make Gas Connections
IMPORTANT: This furnace requires conversion for use with
propane. To order the correct conversion kit, see “Accessories.”
1. Provide a sediment trap on the outside of the furnace section.
2. Install a manual gas shutoff valve in the gas line, outside the
unit in accordance with any local codes.
3. Install a test gauge connection with a
¹⁄₈
" NPT plugged
tapping immediately upstream of the manual gas shutoff
valve as shown.
Connect the gas pipe to the furnace gas valve threaded fitting
provided, installing a ground joint union as close to the controls
as possible to facilitate removal of controls and manifold. Pipe-
joint compounds suitable for use with Natural and LP gas must
be used. Do not use Teflon
®†
tape.
Side entry is the usual method of routing the gas supply to the
unit. Use the factory provided grommet to seal the opening
around the gas pipe preventing rain and moisture from entering
the unit around the gas pipe and reduce noise.
Check Inlet Pressure
1. Remove the burner access panel.
2. Turn off the gas supply at the manual gas shutoff valve.
3. Remove the inlet pressure tap plug on the gas control valve.
Install a
¹⁄₈
" NPT hose connector and connect the pressure
gauge tube.
WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Failure to do so can result in death or electrical shock.
Replace all parts and panels before operating.
†
®Teflon is a registered trademark of E.I. Dupont de Nemours and
Company.
A. Manual gas shutoff valve
B.
¹⁄₈
" NPT plugged tapping
C. Sediment trap
D. Ground joint union
E. Grommet
A. Closed valve
B. Open valve
A
B
C
D
E
6" Min.
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result
in serious injury, death or property damage.
Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically
for the detection of leaks to check all connections. A fire
or explosion may result causing property damage,
personal injury or loss of life.
A
B
