Table of Contents
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Gas Furnaces
Installation Instructions
*RC 92+ Full Size Upfl ow Condensing Furnace
*RL 90+ Full Size Downfl ow Condensing Furnace
*RC 92+ Upfl ow
!
WARNING:
Improper installation, adjustment,
alteration, service, or maintenance
can cause injury or property damage.
Refer to this manual for assistance.
For additional information consult a
qualifi ed installer, service agency, or
the gas supplier.
These instructions are primarily intended
to assist qualifi ed individuals experienced
in the proper installation of this appliance.
Some local codes require licensed installa-
tion/service personnel for this type of equip-
ment. Read all instructions carefully before
starting the installation.
DO NOT DESTROY. PLEASE READ CARE-
FULLY AND KEEP IN A SAFE PLACE FOR
FUTURE REFERENCE.
*RL 90+ Downfl ow
!
FOR YOUR SAFETY:
Do not store or use gasoline or other
fl ammable vapors and liquids in the vi-
cinity of this or any other appliance.
!
FOR YOUR SAFETY:
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor's phone. Follow the
gas supplier's instructions.
• If you cannot reach your gas supplier,
call the fi re department.
• Extinguish any open fl ame.
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Table of Contents
Related Manuals for Nordyne + RC 92+
Summary of Contents for Nordyne + RC 92+
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Page 1: Installation Instructions
Gas Furnaces Installation Instructions *RC 92+ Full Size Upfl ow Condensing Furnace *RL 90+ Full Size Downfl ow Condensing Furnace *RC 92+ Upfl ow WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual for assistance. -
Page 3: Table Of Contents
• Vertical Venting ... 25 • Vent Freezing Protection ... 26 • Concentric and Side Wall Vent Termination ... 27 Drainage of Condensate From Furnace ... 27 Gas Supply and Piping ... 27 Leak Check ... 27 Conversion ... 27 High Altitude Application ... -
Page 4: Furnace Specifi Cations
FURNACE SPECIFICATIONS Figure 1. Upfl ow Unit Dimensions... - Page 5 Figure 2. Downfl ow Unit Dimensions...
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Page 6: Furnace Airfl Ow Data
CAPACITIES —Furnace Airfl ow Data Table 1. Furnace Airfl ow Data... -
Page 7: Furnace Airfl Ow Data
CAPACITIES —Furnace Airfl ow Data continued Table 2. Furnace Airfl ow Data... -
Page 8: Safety Information
A gas-fi red furnace for installation in a resi- dential garage must be installed as specifi ed on Page 10 of these instructions. 10. The furnace is not to be used for temporary heating of buildings or structures under construction. -
Page 9: Clearances To Combustible Materials
CLEARANCES TO COMBUSTIBLE MATERIALS This furnace is Designed Certifi ed by CSA International for the minimum clearances to combus- tible material listed in Table 4. See the furnace name plate, located inside the furnace cabinet, for specifi c model number and clearance information. -
Page 10: Location
fi ed, but that panel or door must be removable and allow the appropriate clearance for your installation. This furnace is certifi ed for use on wood fl ooring. The furnace must be installed on a solid surface and must be level front to back and side to side. - Page 11 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 airfl ow or left to right airfl...
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Page 12: Supply Air Plenum Installation
Warm Air Heating and Air Conditioning Systems (NFPA No. 90B). If outside air is utilized as return air to the furnace for ventilation or to improve indoor air quality, the system must be designed so that the return air to the furnace is not less than 50°F (10°C) during... -
Page 13: Return Air
VENTING AND COMBUSTION AIR REQUIREMENTS NORDYNE condensing furnaces may be installed with outdoor combustion air piped directly to the furnace, or without such special piping. Codes refer to the former as “direct vent” or “two pipe”... - Page 14 Downflow Sub-base Furnace Sheet Metal Plenum Figure 8. Furnace on a Wood Floor * RL 040/060 ** RL 120 18.75" or 13.25" or 21.50"* 16.75" 28.38" or 11.25" 1.50" 1.58" 19.75" or 14.25"* or 22.50"** Figure 9. Downfl ow Sub-Base...
- Page 15 Vent or Chimney - - - - - - 12" - - - Furnace - - - - - - - - - Water Heater 12" Max Minimum Total Input Free Area Round Duct Rating (Btuh) (Each Opening) Diameter 40,000 10 sq.
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Page 16: Combustion Air Quality
If the space has an 8 foot ceiling, the fl oor area of the space must be 750 square feet / 8 = 750). In general, a furnace installed in an unconfi ned space will not require outside air for combustion. -
Page 17: Air From Inside
NORDYNE condensing furnaces are classifi ed as “Category IV” appliances, which require special venting materials and installation procedures. Category IV appliances operate with positive vent pressure and therefore require vent systems which are thoroughly sealed. -
Page 18: Vent Pipe Material
To ensure this use Table 5, which indicates the maximum allowable pip- ing length for a furnace of specifi ed input rate, when installed with piping of selected diameter and number of elbows. This table applies to the length and number of elbows for each pipe. - Page 19 See Vent Table 5 Straps or Other Suitable Supports at Minimum of 5 ft. Intervals Upward Pitch - 1/4" per Foot Outlet Exhaust Vent First Support Placed as Close to Furnace Wall Connection as Possible Normal Snow Level Exhaust Vent Exhaust...
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Page 20: Vent Pipe Installation
Ensure that the connection is tight and leak free. NORDYNE condensing furnaces have been certi- fi ed for installation with zero clearance between vent piping and combustible surfaces. However, it is good practice to allow space for convenience in installation and service. - Page 21 Upfl ow Furnaces Combustion Air Inlet Pipe Collar Diameter 3" for coupling or reducer Furnace Top 2" PVC Exhaust Vent All Models Figure 18. Furnace Pipe Adaptions Support System on Vertical Rise Below Joints Support System with first support as close...
- Page 22 fl ue gases. This may result in furnace vibration. In severe cases, the furnace will cycle due to the intermittent contact between the fl ame and the fl ame sensor. If you note oscillations occurring, check the vent confi...
- Page 23 VENT TERMINAL AIR SUPPLY INLET A = Clearance above grade, veranda, porch, deck, or balcony B = Clearance to window or door that may be opened C = Clearance to permanently closed window D = Vertical clearance to ventilated soffi t located above the terminal within a horizontal distance of 2 feet (61 cm) from the center line of the terminal...
- Page 24 VENT TERMINAL AIR SUPPLY INLET A = Clearance above grade, veranda, porch, deck, or balcony B = Clearance to window or door that may be opened C = Clearance to permanently closed window D = Vertical clearance to ventilated soffi t located above the terminal within a horizontal distance of 2 feet (61 cm) from the center line of the terminal...
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Page 25: Vertical Venting
Note: A combustion air intake must be provided with an elbow opening downward. The screen provided with the furnace must be installed in the elbow to prevent entry of debris or creatures. When the vent pipe must exit an exterior wall close to the grade or expected snow level, a riser should be provided as shown in Figure 20. -
Page 26: Vent Freezing Protection
Drain clockwise (Step 2) 8" Clamp "HARD" J (Loosen For Step 1) Drain Tube (Retighten for Step 3) Figure 24. Furnace with Condensate Drain Trap Assembly Exhaust Vent 1" 18" Min. 36" Max. Exhaust Plumbing Vent Roof Boot (Typ. Both Pipes) below freezing, i.e., when it passes through... -
Page 27: Drainage Of Condensate From Furnace
Do- ing so will have adverse effects on the operation of the furnace. The drain may exit either the right or left side of the furnace cabinet. The condensate drain can be routed to a fl ow drain or to a condensate pump. -
Page 28: Gas Supply And Piping
(usually contains lime- stone). Proper drains and connections to the condensate tubing are required as NORDYNE cannot be held responsible for water leakage which occurs due to loose hose connections or improperly sealed drain line pipes. - Page 29 The cubic feet per hour listed in the table above must be greater than the cubic feet per hour of gas fl ow required by the furnace. To determine the cubic feet per hour of gas fl ow required by the...
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Page 30: Conversion
Conversion Conversion of this furnace to use LP/propane gas must be made by qualifi ed service person- nel, using only approved parts. High Altitude Application High altitude application with this furnace can be fi eld performed by a simple adjustment of manifold pressure, and if necessary changing the orifi... -
Page 31: Electrical Wiring
Canadian Electrical Code (CSA C22.1 Part 1) and/or local codes. If any of the original wire as supplied with the furnace must be replaced, it must be replaced with wire having a minimum temperature rating of 105°C. Refer to the furnace nameplate and Table 12 for electrical requirements. -
Page 32: Start-Up And Adjustments
Use the following procedure to determine the fi ring rate: Shut off all other gas fi red appliances. Start the furnace and allow it to run for at least three minutes. Measure the time (in seconds) required for the gas meter to complete one revolution. -
Page 33: Verifying And Adjusting Temperature Rise
The wiring diagram on the furnace and Figures 27, 28 and 29 show the speed taps for adjusting motor speed. If it is desired that the blower operate at the same speed for heating and cooling, tape off the terminal of the unused blower wire. -
Page 34: Verifying Burner Operation
To verify operation of the burners, make sure that the blower compartment door is in place and that there is power to the furnace. Set the thermostat above room temperature and ob- serve the ignition sequence. The fl ame can be observed through the small clear window on the burner box. -
Page 35: Maintenance
Vent Safety Switch – The vent safety switch shuts the furnace down if the outlet fl ue gas temperature increases above 160°F. This switch protects the plastic fl ue system and the inducer from over-temperature conditions. - Page 36 3 FLASHES 4 FLASHES 5 FLASHES If any of the original wire as supplied with Continuous the furnace must be replaced, it must be replaced with wiring material having a FLAME temperature rating of at least 105 C. YELLOW LIGHT...
- Page 37 Upfl ow Furnace Models 1 Igniter (Not Shown) 2 Flame Sensor (Not Shown) 3 Gas Valve 4 Flame Roll-out Switch(s) 5 Pressure Switch 6 Vent Pressure Switch (Not Shown) 7 Control Board 8 Blower Door Switch 9 Vent Safety Switch...
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Page 38: Heat Exchanger And Burner Maintenance
• Change or replace the air fi lters monthly during any period when the circulating blower is operating regularly. • Always replace the doors on the furnace after servicing. Do not operate the furnace without all doors and covers in place. -
Page 39: Furnace Fails To Operate
2. The circulating air blower is energized im- mediately on the heating speed. 3. If the furnace is operated in the continuous ON position at the thermostat and is then switched to AUTO, the circulating blower will operate for a specifi... -
Page 40: Installation/Performance Checklist
FUEL TYPE: Natural Gas _______ LP/Propane _________ Gas Piping Connections leak-tested? _______ Gas Line Pressure: _____________________ (in. water column, with furnace operating) Manifold Pressure: ______________________ (in. water column, with furnace operating) Is there adequate fresh air supply for combustion and ventilation? ______________ Furnace Input: __________________ Supply Air Temperature: ____________ (°...