Installation Instructions

SHORT 90 FURNACES USING

VR82, VR92 and 36J GAS VALVES

NOTE: All threaded connections must be sealed with

Teflon tape or pipe dope. Pipe sealant must be approved

for use with propane gas.

1. Install field-supplied ½” x length required to exit wrapper, when the inlet is on left side.

2. For installing the pressure switch, in case of a right side inlet, install field-supplied ½”x 1 ½” required for “C and D” size

cabinet models. “B” cabinet models require a field supplied ½” x length sufficient enough to be clear from any interfer-

ence from other components. The pressure switch can be installed within or outside the cabinet in case of right side in-

let.

3. Place ½” tee on pipe.

4. With gas valve and manifold installed in the unit, connect the gas supply line into 1/2" tee as required (typically opposite

of gas valve side).

5. Install ½” x 1/8" bushing into ½” tee in the remaining opening.

6. Install pressure switch in bushing (See Figure 13).

NOTE: Ensure that the switch is upright in all applications.

7. Perform installation check out procedure (piping leak check, line pressure measurement, manifold pressure adjustment,

etc.) as outlined in the unit installation instructions.

8. Turn OFF gas supply.

9. Turn OFF power to furnace. Connect jumper harness between LPLP switch and gas valve and gas valve wiring as indi-

cated in Figure 7 (single-stage models - some models may require the use of long single-stage harness) or Figures 8-11

(two-stage models). Some two-stage models may require the use of long jumper wires to accommodate connection of

the switch. (2nd long jumper wire can be taken from long single stage harness.)

NOTE: Do not run wires through the gas pipe opening if gas piping is present. Pipe could easily cause damage to the

wires.

10. Turn ON power to furnace. Verify proper unit operation.

11. Remove backing from kit label. Fold label around jumper harness wire to indicate kit installation.

12. Adhere kit wiring diagram adjacent to existing unit wiring diagram.

IMPORTANT NOTE: Secure all wires to avoid their contact with any hot surfaces or moving parts.

Figure 13

Gas plumbed out the right side

of the furnace

Gas Valve

Gas plumbed out the left side

of the furnace

Gas Valve