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THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
Improper installation, adjustment, alteration, service, or
maintenance can cause injury or property damage. Refer
to this manual. For assistance or additional information,
consult a licensed professional (or equivalent), HVAC
installer, service agency, or the gas supplier.
Do not store combustible materials, including gasoline
and other flammable vapors and liquids, near the unit,
vent pipe, or warm air ducts. Such actions could cause
property damage, personal injury, or death.
This unit is designed for use with R-454B refrigerant only.
The installation of the unit, wiring, warm air ducts, venting, etc. must conform to the requirements of the National Fire
Protection Association; the National Fuel Gas Code, ANSI Z223.1 (latest edition) and the National Electrical Code, ANSI/
NFPA No. 70 (latest edition) in the United States; the Canadian Installation Codes CAN/CGA-B149.1 & .2 (latest edition)
and the Canadian Electrical Code Part 1, CSA 22.1 (latest edition) in Canada; and any state or provincial laws, local
ordinances, or local gas utility requirements. Local authorities having jurisdiction should be consulted before installation
is made. Such applicable regulations or requirements take precedence over the general instructions in this manual.
508689L01
WARNING
WARNING
Save these instructions for future reference
INSTALLATION AND MAINTENANCE
INSTRUCTIONS
LRP15G(E/X)V715 SERIES UNITS
RESIDENTIAL PACKAGED UNITS
Gas/Electric
508689L01
08/2024
Table of Contents
Unit Dimensions ..........................................................5
Roof Curb Dimensions ................................................7
Adjustable Roof Curb Dimensions...............................9
Installation .................................................................12
Venting.......................................................................16
Duct System ..............................................................17
Condensate Drain......................................................17
Gas Piping .................................................................18
Electrical Wiring .........................................................19
Heating Start-Up .......................................................20
Operation ...................................................................22
Maintenance ..............................................................25
Blower Performance ..................................................27
Refrigerant Detection System ...................................28
Wiring Diagrams ........................................................31
Decommissioning ......................................................32
*P508689L01*
CAUTION
Issue 2434
LENNOX INDUSTRIES
DALLAS, TEXAS
(P) 508689L01
Page 1 of 32
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Summary of Contents for Lennox LRP15GEV715 Series
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Page 1: Table Of Contents
Decommissioning ............32 WARNING Do not store combustible materials, including gasoline and other flammable vapors and liquids, near the unit, LENNOX INDUSTRIES vent pipe, or warm air ducts. Such actions could cause DALLAS, TEXAS property damage, personal injury, or death. This unit is designed for use with R-454B refrigerant only. - Page 2 WARNING WARNING • Do not use means to accelerate the defrosting The maximum altitude is 4500 ft (1372 m) with no process or to clean, other than those recommended modifications to the gas system. The maximum altitude by the manufacturer. is 10,000 ft (3200 m).
- Page 3 IMPORTANT IMPORTANT • Ensure that the REFRIGERATING SYSTEM is In addition to conventional charging procedures, the earthed prior to charging the system with refrigerant. following requirements shall be followed. • Label the system when charging is complete (if not • Ensure that contamination of different refrigerants already).
- Page 4 charge (lb) <4 charge (kg) <1.8 Minimum Conditioned Area (ft N/A* Minimum Conditioned Area (m N/A* 11.2 14.0 Units with refrigerant charge below 4 lb.(1.8 kg) do not require a minimum conditioned room area. -Units supply duct must be connected via air duct system to one or more rooms, totaling minimum conditioned area. Table 1.
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Page 5: Unit Dimensions
Unit Dimensions (Inches) - Small Base Gas/Electric Unit Dimensions - Small Base Gas/Electric TOP VIEW CONDENSATE DRAIN 3/4 NPT 47.66 14.02 SIDE VIEWS 2.48 2.33 5.00 16.77 2.33 1.98 16.07 21.63 RETURN SUPPLY 11.49 11.49 18.52 4.81 40.89 13.21 TYPICAL 47.66 POWER ENTRY VENT HOOD... - Page 6 Unit Dimensions (Inches) - Large Base Gas/Electric Unit Dimensions - Large Base Gas/Electric TOP VIEW CONDENSATE 56.13 DRAIN 3/4 NPT SIDE VIEWS 19.49 19.49 5.00 2.33 2.39 2.33 2.11 16.07 44.89 RETURN SUPPLY 21.63 11.49 11.49 18.52 4.81 47.66 13.21 POWER ENTRY TYPICAL TYPICAL DRAIN...
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Page 7: Roof Curb Dimensions
Roof Curb Dimensions (Inches (mm)) - 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... - Page 8 Roof Curb Dimensions (Inches (mm)) - 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...
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Page 9: Adjustable Roof Curb Dimensions
Adjustable Roof Curb Dimensions (Inches) - Small Base Gas/Electric (Knock-Down Style) CLIPLOCK CORNER DETAIL Top Edge Wood Nailer Strip CURB PROFILE Bottom Flange Typical Slot Typical Locking Tab NOTE: See Cliplock 1000 installation instructions for complete assembly and installation procedures and requirements. 1-3/4 Opening for Power Line Entry thru base... - Page 10 Adjustable Roof Curb Dimensions (Inches) - Large Base Gas/Electric (Knock-Down Style) CLIPLOCK CORNER DETAIL Top Edge Wood Nailer Strip Bottom Flange CURB PROFILE Typical Slot Typical Locking Tab NOTE: See Cliplock 1000 installation instructions for complete assembly and installation procedures and requirements. 1-3/4 Opening for Power Line Entry thru base...
- Page 11 Adjustable Roof Curb Dimensions (Inches (mm)) (Welded Style) 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)
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Page 12: Installation
Inspection As soon as the unit is received, it should be inspected WARNING for possible damage during transit. If damage is evident, the extent of the damage should be noted on the carrier’s Improper installation, adjustment, alteration, service, or freight bill. A separate request for inspection by the carrier’s maintenance can cause injury or property damage. -
Page 13: Installing The Unit
Installing the Unit If in doubt, consult the manufacturer’s technical department for assistance. The following checks Every working procedure that affects safety means shall shall be applied to installations using FLAMMABLE only be carried out by competent persons. This appliance REFRIGERANTS as applicable: is not to be used by persons (including children) with 1. - Page 14 Use of Unit During Construction source of ignition and is suitable for the refrigerant used. Leak detection equipment shall be set at a Use of this unit as a construction heater or air conditioner is percentage of the LFL of the refrigerant and shall be not recommended during any phase of construction.
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Page 15: Roof Curb Installation
Clearances Do not permit overhanging structures or shrubs to obstruct condenser air discharge outlet, combustion All units require certain clearances for proper operation air inlet, or vent outlet. and service. Refer to Table 2 for the minimum clearances to combustibles, servicing, and proper unit operation. In the U.S., units may be installed on combustible floors Roof Curb Installation made from wood or class A, B, or C roof covering material. -
Page 16: Venting
CAUTION As with any Mechanical equipment, personal injury can result from contact with sharp sheet metal edges. Be careful when you handle this equipment. WARNING This unit is charged with R-454B refrigerant. Operating pressures for units charged with R-454B are higher than pressures in units charged with HCFC-22. -
Page 17: Duct System
Filters Follow the preceding steps for each appliance connected to the common venting system. Air filters are not supplied with the unit. A field-provided air filter must always be installed ahead of the evaporator coil After it has been determined that each appliance and must be cleaned or replaced if necessary. -
Page 18: Condensate Drain
Condensate Drain Gas Piping This package unit is equipped with a 3/4” FPT coupling Proper sizing of a gas piping depends on the cubic feet per for condensate line connection. Plumbing must conform hour of gas flow required, specific gravity of the gas, and to local codes. -
Page 19: Gas Connection
Gas Connection Check all connections for leaks when piping is completed, using a soapy, non-chlorine based solution. Some soaps The gas supply line is routed through the gas entry used for leak detection are corrosive to certain metals. location on the side of the unit (see Figure 3). A grommet is Carefully rinse piping thoroughly after completing provided in the instruction bag and should be used to seal leak detection. -
Page 20: Heating Start-Up
Thermostat Field-Supplied Fused The room thermostat should be located on an inside Ground or Circuit Breaker Contactor wall where it will not be subject to drafts, sun exposure, Disconnect or heat from electrical fixtures or appliances. Follow the manufacturer’s instructions enclosed with thermostat for general installation procedure. -
Page 21: Post-Start Check List
The manifold pressure can be measured by shutting off the gas, removing the pipe plug in the downstream side of the gas valve, and connecting a water manometer or gauge. Under no circumstances should the final manifold pressure vary more than 0.3” w.c. from the above specified pressures. -
Page 22: Blower Control
Operation Install a water manometer. Slide the gas valve switch to the “ON” position and Blower Control initiate a call for heat. If manifold pressure must be Units are equipped with a variable speed motor that is adjusted, the gas valve has separate adjusting screws capable of maintaining a specified CFM throughout the for first stage (LO) and second stage (HI) (see Figure external static range. -
Page 23: Cooling System
In the cooling mode, the blower control delays blower action completes the low voltage control circuit, energizing operation for 5 seconds after the compressor starts. The the compressor, condenser fan motor, and blower motor. blower continues to operate for 90 seconds after the Second stage cooling is initiated by thermostat energizing compressor is de-energized. -
Page 24: Heating System
speed settings. If unit performance remains questionable, The ignition control energizes the gas valve and spark. remove system charge, evacuate to 500 microns, and The control ignores the flame sense signal for the first weigh in refrigerant to nameplate charge. It is critical that two seconds of the ignition trial. -
Page 25: Maintenance
Evaporator Coil Flame Sensor Dirt and debris should not be allowed to accumulate on If the ignition control does not receive a signal from the the evaporator coil surface or other parts in the air circuit. flame sensor indicating that the burners have established Cleaning should be as often as necessary to keep coil flame, the gas valve closes after the 10-second trial for clean. - Page 26 Brush out the inside of the flue collector box. Run the wire brush down the heat exchanger tubes from the flue collector end. If soot buildup is excessive, remove the vent motor and clean the wheel and housing. Run the wire brush down the flue extension at the outlet of the vent housing.
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Page 27: Blower Performance
Blower Performance Blower Control Jumper Speed Positions “ADJUST” Jumper “COOL” Speed - cfm “HEAT” Speed - cfm “CONTINUOUS FAN” Speed - cfm Setting Blower Performance 0 through 0.80 in. w.g. External Static Pressure Range 1100 1100 1000 NORM 1000 1100 1000 —... -
Page 28: Sensor Maintenance
Leak Detected When the RDS Non-Communicating Blower Control Board detects a refrigerant leak: The RDS Non-Communicating Blower Control Board shuts off the (R) input (24VAC power) to the thermostat, which de-energizes the outdoor unit compressor and heat sources, such as gas and/or electric strip heat. No heating or cooling demands will be met. - Page 29 TABLE 8. Red LED Diagnostic Codes TABLE 10. Additional Button Functions Applies to Issue Action State Press Action Flash Individual Initializing Short Skips remaining pre-purge after sen- Sensor(s) sors are recognized by the RDSC Replace the sensor Sensor indicates fault (Cat.
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Page 30: Additional Applications
Additional Applications Heating Demand 1 - Prompt a heating demand at the thermostat. In zoned applications, all dampers will remain open when the RDS Non-Communicating Blower Control Board is in 2 - Press the Test Button on the RDS Non-Communicating Fault or Leak Detected mode. -
Page 31: Wiring Diagrams
Wiring Diagrams Figure 9. Wiring Diagram – Single Phase 508689L01 Issue 2434 Page 31 of 32... -
Page 32: Decommissioning
Decommissioning Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of recovered refrigerant.
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Is this the Platinum Lenox model which is the two stage model.