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©2021 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT FOR
FUTURE REFERENCE
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, or service agency.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
INSTALLATION
INSTRUCTIONS
LRP14GN SERIES UNITS
RESIDENTIAL PACKAGED UNITS
Gas/Electric ULNOx
508218-01
08/2021
Table of Contents
Unit Dimensions ..........................................................2
Roof Curb Dimensions ................................................4
Adjustable Roof Curb Dimensions...............................6
Installation ...................................................................7
Venting.........................................................................9
Duct System ..............................................................10
Filters .........................................................................10
Condensate Drain......................................................11
Gas Piping .................................................................11
Electrical Wiring ........................................................12
Heating Start-Up .......................................................13
Operation ...................................................................14
Maintenance ..............................................................16
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
Page 1
CAUTION
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Summary of Contents for Lennox LRP14GN Series
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS ©2021 Lennox Industries Inc. LRP14GN SERIES UNITS Dallas, Texas, USA RESIDENTIAL PACKAGED UNITS Gas/Electric ULNOx 508218-01 08/2021 Table of Contents Unit Dimensions ............2 Roof Curb Dimensions ..........4 Adjustable Roof Curb Dimensions.......6 Installation ..............7 Venting.................9 Duct System ..............10 Filters .................10 Condensate Drain............11... -
Page 2: Unit Dimensions
Unit Dimensions - Small Base Gas/Electric 47.66 2.48 1.98 2.33 2.33 16.77 14.02 DOWNFLOW DOWNFLOW 18.52 11.49 11.49 RETURN SUPPLY 16.07 TOP VIEW BOTTOM 47.66 POWER ENTRY BOTTOM GAS ENTRY 6.94 3.25 4.56 20.31 21.06 23.19 SIDE VIEWS POWER ENTRY 3.87 1-1/8 DIA. - Page 3 Unit Dimensions - Large Base Gas/Electric 56.13 2.11 2.39 2.33 2.33 19.49 19.49 DOWNFLOW DOWNFLOW 18.52 11.49 11.49 RETURN SUPPLY TOP VIEW 16.07 BOTTOM 47.66 POWER ENTRY BOTTOM GAS ENTRY 6.94 3.25 10.06 25.81 26.56 28.68 SIDE VIEWS 3.87 POWER ENTRY 1-1/8 DIA.
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Page 4: Roof Curb Dimensions
Roof Curb Dimensions - Small Base Gas/Electric 3/4 (19) RETURN Opening for Power Entry OPENING Through Unit Base 5-1/2 x 5-5/8 in. (140 x 31 mm) 16-7/8 44-3/8 (429) (1127) 11-1/2 2-1/8 (287) (54) Insulated Panels 5-3/4 13-7/8 (146) (352) SUPPLY 5-1/2 OPENING... - Page 5 Roof Curb Dimensions - Large Base Gas/Electric 3/4 (19) Opening for Power Entry Through Unit Base 5-1/2 x 5-5/8 in. 19-1/2 (140 x 31 mm) 44-3/8 (380) 11-1/2 2-1/8 (1127) (287) (54) RETURN Insulated OPENING Panels 19-1/2 (380) SUPPLY OPENING 11-1/2 (287) 8 (203)
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Page 6: Adjustable Roof Curb Dimensions
Adjustable Roof Curb Dimensions ADJUSTABLE PITCH ROOF CURB FRONT FLANGE 8 (203) NOTE: UNIT BASE RAIL Minimum CLIPS (4) Height 4 (102) BUILT-IN RAIN SIDES AND DIVERTER BACK FLANGE (Not Shown) 6 (152) BUILT-IN DRIP EDGE UNIT BASE RAIL 3/4 (76) UNIT BASE RAIL CLIPS (4) (152) -
Page 7: Installation
Installation Unit is designed for outdoor installation only. Unit must be installed so all electrical components are protected These instructions must be saved for future reference. from water. These units are single package air conditioners with gas Condenser coils must have an unlimited supply of air. heat designed for outdoor installation on a rooftop or a For ground level installation, use a level prefabricated slab. - Page 8 • Return air temperature range between 55°F (13°C) Clearance to Clearance for and 80°F (27°C) must be maintained. Combustibles Service Access • Air filters must be replaced and pre-filters must be Front of unit 0 in. 24 in. removed upon construction completion. Back of unit 0 in.
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Page 9: Venting
Venting All panels must be in place for rigging. Place field-provided spreaders in place. Spreaders The vent outlet must be installed in a location as to prevent must be of adequate strength and length (must exceed building degradation and must be consistent with the unit dimension by 6 inches). -
Page 10: Duct System
Duct System NOTE: The duct system should be designed and sized according to the methods in the Air Conditioning Contractors of If an existing gas furnace is being removed from a America (ACCA) manual that is most appropriate to the common venting system when this packaged unit is installation application. -
Page 11: Condensate Drain
To prime trap, pour several quarts of water into drain, Unit Model Filter 1 Filter 2 enough to fill drain trap and line. 24, 30, 36 14 x 20 x 1 20 x 20 x 1 42, 48, 60 20 x 20 x 1 CAUTION Table 2. -
Page 12: Electrical Wiring
Electrical Wiring NOTE: An optional bottom-entry gas kit is available for these units. See the kit instructions for proper installation See Figure 5 and Figure 6 details. All wiring should be done in accordance with the National Electrical Code, ANSI/NFPA No. 70 (latest edition); Canadian Electrical Code Part 1, CSA C22.1 (latest edition);... -
Page 13: Heating Start-Up
Heating Start-Up For Your Safety, Read Before Lighting THERMOSTAT OUTDOOR UNIT CAUTION Blue Furnace is equipped with a direct ignition control. Do Yellow not attempt to manually light the burners. White Green Pre-Start Checklist Complete the following checks before starting the unit: Check the type of gas being supplied. -
Page 14: Operation
Post-Start Checklist For example, by actual measurement, it takes 67 seconds for the hand on the 1-cubic foot dial to make a revolution After the entire control circuit has been energized and the with a 54,000 BTU/HR furnace running. The result is 53,731 heating section is operating, make the following checks: BTU/HR (based on a heating value of 1,000 Btu/ft³), which Check for gas leaks, using soapy solution, in the unit... - Page 15 Cooling System Performance blower ramps from ignition speed to continuous run speed. This equipment is a self-contained, factory-optimized refrigerant system. The unit should not require adjustments If the flame sensor does not sense that a flame has to system charge when properly installed. If unit been established in the 10-second interval, then the performance is questioned, perform the following checks.
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Page 16: Maintenance
Secure Owner’s Approval Vent Outlet When the system is functioning properly, secure the owner’s Visually inspect vent outlet periodically to make sure that approval. Show the owner the location of all disconnect there is no buildup of soot or dirt. If necessary, clean to switches and the thermostat. - Page 17 Table 5. Cooling Performance - Gas/Electric Models 80 DB / 67 WB Deg. Air Temperature Entering Evaporator Coil, Degree F Return Air Cooling Input Pressure 65° 70° 75° 80° 82° 85° 90° 95° 100° 105° 110° 115° (1000 BTU) Suction Liquid Page 17...
- Page 18 Figure 8. Wiring Diagram – Single Phase CT Page 18...