035-24121-001-C-1015
2
Johnson Controls Unitary Products
FURNACE CONVERSION
1.
Shut off gas supply at shutoff valve upstream of the furnace
or at meter as required.
2.
Remove the access panel to the gas heat compartment.
3.
Carefully remove the wires from the gas valve and note
their location so they may be properly replaced. Remove
the screws that hold the manifold to the manifold brackets
and slide the manifold off the burners.
4.
Remove the main burner orifices from the manifold and
retain for future use.
5.
Install the propane main burner orifices in the manifold and
tighten them. After installing a propane orifice in each loca-
tion, any leftover orifices may be discarded.
6.
Reinstall the manifold in the assembly by reversing the
removal process.
7.
Reconnect the wires to the proper terminals on the gas
valve.
8.
When installing gas piping, insert tapped gas pipe nipple
(supplied with kit) into inlet fitting of gas valve. Tighten until
the 1/8 inch tapped hole in the gas pipe nipple is located in
the side facing outward toward where the door is to be
installed.
9.
Install (thread) the gas line pressure switch (supplied with
kit) into the 1/8 NPT tapped hole in nipple applying pipe
joint compound to the switch fitting prior to installation.
Using a 7/16 inch open end wrench, tighten the switch mak-
ing sure the connection does not leak. Electrical connec-
tions should be facing the right.
10. Rotate the tapped gas pipe nipple a 1/4 turn so the pres-
sure switch is positioned on top of the gas pipe . Refer to
Figure 1.
11. Disconnect the wire from the flame sensor.
12. Using the wire harness (supplied with kit) connect the wire
from the flame sensor into the insulated male connector;
connect the two 1/4” insulated terminals to the pressure
switch; and connect the remaining insulated terminal to the
flame sensor.
13. Convert the gas valve for LP (propane) gas operation by
following the instructions and using the components sup-
plied in the envelope. Apply the label supplied in the kit to
the gas valve to show that it has been converted.
14. Reconnect the gas supply piping to the gas valve and
insure that all gas connections are tight.
15. Turn on gas supply to furnace and check all gas connec-
tions with suitable leak detector.
16. Install the propane gas conversion label as described in the
LABELS section of this instruction.
17. Refer to the unit installation instructions to complete the
installation before continuing with these procedures.
LABELS
1.
Remove conversion rating plate label from the shipping
box.
2.
On the gas appliance conversion label, write the following:
a.
Kit number, located on the outside of the kit box.
b.
Stamp or write in the name of the organization making
conversion, address, city, state, month, and year.
3.
Remove label backing and affix label adjacent to the rating
plate.
CAUTION
The gas supply shall be shut off prior to disconnecting the
electrical power before proceeding with the conversion.
NOTICE
Do not remove the LoNOx screens from the heat exchanger
tubes.
FIGURE 1:
Tapped Gas Pipe Nipple
!
A0243-001
NOTICE
The gas line pressure switch will cause the furnace to lock
out if the gas supply pressure drops below 6” w.c. The igni-
tion control will display a fault code 7 and will reset after one
hour.
