*L1RC/*GC1RC 92+ Residential Gas Furnace
Horizontal Installation Kit
Installation Instructions
These instructions are primarily intended to assist qualified individuals experienced in the proper installation of this appliance. Some local codes require licensed installation/service personnel for this type of equipment. Read all instructions carefully before starting the installation.
The components of this kit are listed in Table
1. If any parts are missing, contact your local distributor.
WARNING:
This conversion kit for horizontal installation is to be installed by a qualified service technician in accordance with these instructions and all codes having jurisdiction. Failure to follow these instructions could result in serious injury, property damage, or death. The qualified service technician performing this work assumes responsibility for this conversion.
Figure 1. 90+ Upflow Horizontal Installation
Suspended in Attic or Crawl Space
Description Qty.
Installation Instructions
1/2” Barbed Fitting
3/4” Barbed Fitting
2” to 1/2” PVC Reducer Bushing
2” PVC Tee
Tube, Drain Hard “J” (5”x2”)
Tube, Soft (10”)
Tube, Soft (50”)
Tube, High Temp.
(Grey, 25”)
Vinyl Cap (5/8”)
Vinyl Cap (1/2”)
Hose Clamp (7/8” Dia.)
3” to 2” Reducer
Pressure Switch (0.90” w.c.)
Wire (20”)
Check the contents of the installation kit against this parts list, and familiarize yourself with the components.
1
1
1
1
1
1
1
1
1
3
1
1
1
1
1
Table 1. Parts List -
Horizontal Conversion Kit #904079 -
2” Vent
Description
Installation Instructions
3/4” Barbed Fitting
3” to 3/4” PVC Reducer Bushing
3” PVC Tee
Tube, Drain Hard “J” (5”x2”)
Tube, Soft (10”)
Tube, Soft (50”)
Tube, High Temp. (Grey, 25”) 1
Vinyl Cap (5/8”)
Vinyl Cap (1/2”)
Hose Clamp (7/8” Dia.)
Pressure Switch (0.90” w.c.)
Wire (20”)
Part No. Qty.
1
1
1
2
1
1
1
1
1
3
1
1
Check the contents of the installation kit against this parts list, and familiarize yourself with the components.
Table 2. Parts List -
Horizontal Conversion Kit #904080 -
3” Vent
CAUTION:
Damage to the product resulting from failure to follow instructions or use of unauthorized parts may void the manufacturer’s product warranty coverage.
When installed horizontally, the furnace must be raised approximately 6 inches above the surface to allow the drain trap assembly to hang vertically below the furnace. This will allow for proper drainage of the condensate from the furnace.
General
The 92+ upflow furnace can be installed horizontally in an attic, basement, crawl space or alcove. This furnace can be installed horizontally to the clearances listed in Table 3 on a platform or on the ceiling rafters. Note that the platform and the ceiling rafters must be able to support the weight of the furnace being installed. It can also be suspended from a ceiling in a basement or utility room in either a right to left airflow or left to right airflow (See Figure 1).
If the furnace is to be suspended from the ceiling, it will be necessary to use steel straps around each end of the furnace. These straps should be attached to the furnace with sheet metal screws and to the rafters with bolts. The furnace could also be suspended by an angle iron frame bolted to the rafters (See Figure 1).
Clearances to Combustibles
This furnace, when installed horizontally, is designed for the minimum clearances to combustible material listed in Table 3. Note that access for positioning and servicing the unit must be considered when locating unit. Twenty four (24) inches is the minimum required clearance from the front of the unit for servicing. Thirty (30) inches is the minimum required clearance from the front of the unit for positioning. Thirty six (36) inches is the recommended clearance from the front of the unit. Please note that a panel or door can be located such that the minimum clearance on the rating plate is satisfied, but that panel or door must be removable and allow the appropriate clearance for your installation.
Refer to the furnace name plate, located inside the furnace cabinet, for specific model number and clearance information.
Top
Venting Requirements
NOTE: When installing a *RC120 furnace, it is required to use a 3” vent kit (Part No. 904080).
In order to ensure complete drainage of all
Outlet
Side
Return
Side
Header
Box
Grey
Tubing
In-line
Drain
Soft "J"
Tubing
Pressure
Switch
Bottom
2
DIMENSION
Outlet Side
Return Side
Vent
Back
Bottom
Top
Front
MINIMUM
CLEARANCE (INCHES)
1
0
0
0
0
0
1*
*24” is the minimum clearance for servicing.
36” is the recommended service clearance.
Table 3. Minimum Clearances to
Combustible Materials
"J" Drain
Trap
Assembly
30" Soft
Tubing
Figure 2. 90+ Upflow Furnace as Shipped
From the Factory
condensate, an additional “T” shaped vent drain assembly must be installed in-line with the vent piping (see Figures 3 and 4). The “Tee” shaped vent drain assembly consists of a 2” PVC with a 2” to 1/2” PVC reducer bushing glued into the tee. See Figures 3 and 4 for your installation in order to glue the tee. Next glue the 1/2” barbed fitting into the reducer bushing. Ensure that all glued joints are tight and sealed. A 50” piece of soft tubing is supplied with the horizontal installation kit. Assemble this piece to the barb at the bottom of the “T” assembly. condensate. Loop the tubing in a circle in order to create a trap and secure. The drain tubing can then be routed out the same drain as the furnace drainage system.
NOTE: Ensure a tight fit in order to avoid any leakage of the
Follow the same instructions for the installation of the furnace and maximum vent pipe lengths as given in the installation instructions provided with the furnace. NOTE: A 3” to 2” reducer is also supplied with the horizontal installation kit, if 3” piping is preferred coming off the “T” shaped vent drain assembly. If using alternate configuration (shown in Figures 3 and 4), reducer must be installed above drain assembly to ensure drainage.
9. Attach the grey tubing supplied in the kit from the white pressure switch to the port on the header box.
10. Assemble the 10” piece of soft tubing to the drain tap located on the right side of the header. Feed the tube through the round hole located in the right side of the cabinet wrapper. NOTE: A downward slope must be maintained on the tube as it is routed through the furnace (when the furnace is in the horizontal position).
11. Assemble the 5” tall end of the hard “J” tube to the end of the soft tube located outside of the furnace. Secure the connection using one of the 7/8” hose clamps supplied with the installation kit.
12. Assemble the 30” piece of soft tubing removed from the factory installed “J” tube drain trap to the 2” tall end of the new “J” tube drain trap. Secure the connection with the second 7/8” hose clamp.
NOTE: Ensure the clamps in step 11 and
12 are securely tightened in order to avoid any condensate leakage.
NOTE: To avoid condensate freezing in the drain trap assembly and tubing, insulate around the drain trap assembly and all tubing located in unconditioned space.
Conversion for Horizontal Right
Installation (See Figures 2 & 3)
1. Remove the hard “J” tube drain trap assembly. Discard the assembly with the exception of the 30” piece of soft tubing.
2. Place the 5/8” cap plug over the drain tap in the header box from which the “J” drain trap assembly was removed.
3. Remove the soft “J” tubing between the inline drain and the header box, and discard.
4. Place a 5/8” cap plug over the drain port on the inline drain where the soft “J” tube was removed.
5. Mount the white pressure switch to the furnace with sheet metal screws in the holes provided.
6. Remove one of the orange wires from the pressure and attach to the white pressure switch.
7. Attach the orange wire supplied in the kit between the white pressure switch and the factory installed pressure switch.
8. Remove the 1/4” vinyl cap from the bottom of the header box.
Conversion for Horizontal Left
Installation (See Figures 2 & 4)
Refer to Figure 4 for details and description of parts required for the horizontal left conversion.
1. Remove the hard “J” tube drain trap assembly. Discard the assembly with the exception of the 30” piece of soft tubing.
2. Mount the white pressure switch to the furnace with sheet metal screws in the holes provided.
3. Remove one of the orange wires from the pressure and attach to the white pressure switch.
4. Attach the orange wire supplied in the kit between the white pressure switch and the factory installed pressure switch.
5. Remove the 1/4” vinyl cap from the bottom of the header box.
6. Attach the grey tubing supplied in the kit from the white pressure switch to the port on the header box.
7. Assemble the 10” piece of soft tubing to the drain tap located on the left side of the header. Feed the tube through the round
3
hole located in the left side of the cabinet wrapper. NOTE: A downward slope must be maintained on the tube as it is routed through the furnace (when the furnace is in the horizontal position).
8. Assemble the 5” tall end of the hard “J” tube to the end of the soft tube located outside of the furnace. Secure the connection using one of the 7/8” hose clamps supplied with the installation kit.
9. Assemble the 30” piece of soft tubing removed from the factory installed “J” tube drain trap to the 2” tall end of the new “J” tube drain trap. Secure the connection with the second 7/8” hose clamp.
NOTE: To avoid condensate freezing in the drain trap assembly and tubing, insulate around the drain trap assembly and all tubing located in unconditioned space.
Orange Wire
Pressure Switch
3" to 2"
Reducer
(Optional)
PVC Tee
PVC Reducer
Bushing
Grey
Tubing
1/4" Vinyl
Cap 1/2" Vinyl
Cap
5" x 2" Drain
Trap Assembly
30" Soft
Tubing
50" Soft Tubing
Looped to Provide a Drain Trap
1/2" Barbed Fitting
(3/4" Barb for 3" Vent)
Figure 3. 90+ Upflow Converted for Horizontal Installation (Horizontal Right)
3" to 2"
Reducer
(Optional)
Alternative for
Horizontal
Vent PVC Tee
Pressure
Switch
Orange Wire
Soft Tubing
Reducer
Bushing
50" Soft Tubing
Looped to Provide a Drain Trap
1/2" Barbed
Fitting
30" Soft
Tubing
Grey
Tubing
1/4" Vinyl Cap
5" x 2" Drain
Trap Assembly
Figure 4. 90+ Upflow Converted for Horizontal Installation (Horizontal Left)
Specifications & illustrations subject to change without notice or incurring obligations (07/15).
O’Fallon, MO, © Nortek Global HVAC LLC 2015.
All Rights Reserved.
7085180 (Replaces 708283B)
