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©2023 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER 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.
WARNING
To prevent serious injury or death:
1. Lock-out/tag-out before performing maintenance.
2. If system power is required (e.g., smoke detector
maintenance), disable power to blower, remove fan
belt where applicable, and ensure all controllers
and thermostats are set to the "OFF" position before
performing maintenance.
3. Always keep hands, hair, clothing, jewelry, tools, etc.
away from moving parts.
STEP 1 – SETTING THE UNIT – Clearances
See NOTES
See
NOTES
See NOTES
NOTES:
Service clearance of 30 in. (762 mm) must be maintained on one of
the sides adjacent to the control box.
Clearance to one of the other three sides must be 36 in (914 mm).
See
Clearance to one of the remaining two sides may be 12 in. (305mm)
NOTES
and the final side may be 6 in.(152 mm).
A clearance of 24 in. (610 mm) must be maintained between two units.
48 in. (1219 mm) clearance required on top of unit.
Control
Box
Page 1
INSTALLATION
INSTRUCTIONS
Elite
Series EL17XP1 Units
®
HEAT PUMP
508262-01
9/2023
General
This EL17XP1 outdoor heat pump with all-aluminum coil
is designed for use with HFC-410A refrigerant only. This
unit must be installed with an approved indoor air handler
or coil. For AHRI Certified system match-ups and expand-
ed ratings, visit www.LennoxPros.com. These instructions
are intended as a general guide and do not supersede
local codes in any way. Consult authorities having jurisdic-
tion before installation.
NOTICE!
Charging information is given on the charging
procedure sticker on the unit access panel. For
more in-depth information, consult the Installation
and Service Procedures manual, available on
LennoxPros.com or through the Technical Support
department at 800-453-6669.
CAUTION
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.
IMPORTANT: Special procedures are required for clean-
ing the all-aluminum coil in this unit. See page 18 in this
instruction for information.
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Summary of Contents for Lennox Elite EL17XP1
- Page 1 INSTALLATION INSTRUCTIONS ©2023 Lennox Industries Inc. Elite Series EL17XP1 Units Dallas, Texas, USA ® HEAT PUMP 508262-01 9/2023 General This EL17XP1 outdoor heat pump with all-aluminum coil is designed for use with HFC-410A refrigerant only. This unit must be installed with an approved indoor air handler or coil.
- Page 2 UNIT DIMENSIONS - INCHES (MM) LIQUID LINE CONNECTION ELECTRICAL INLETS SUCTION LINE CONNECTION 4-3/4” 4-1/2” (121) (108) TOP VIEW SIDE VIEW Model Number EL17XP1-018-230 45 (1143) EL17XP1-024-230 45 (1143) 30-1/2 (775) 35 (889) EL17XP1-030-230 35 (889) EL17XP1-036-230 35 (889) EL17XP1-042-230 39 (991) 35-1/2 (902) 39-1/2 (1003)
- Page 3 WARNING IMPORTANT To prevent personal injury, as well as damage to panels, This model is designed for use in check / expansion unit or structure, observe the following: valve systems only. An indoor expansion valve approved for use with HFC-410A refrigerant must be ordered While installing or servicing this unit, carefully stow all separately and installed prior to operating the system.
- Page 4 Polyol ester (POE) oils are used Refrigerant can be harmful if it is inhaled. Refrigerant in Lennox units charged with HFC-410A refrigerant. must be used and recovered responsibly. Residual mineral oil can act as an insulator, preventing Failure to follow this warning may result in personal proper heat transfer.
- Page 5 STEP 2 – REFRIGERANT PIPING – (Continued) TYPICAL EXISTING FIXED ORIFICE TYPICAL EXISTING EXPANSION VALVE REMOVAL REMOVAL PROCEDURE PROCEDURE (UNCASED COIL SHOWN) (UNCASED COIL SHOWN) STUB END TWO-PIECE PATCH PLATE LIQUID LINE CHECK DISTRIBUTOR TUBES (UNCASED COIL ONLY) ORIFICE EXPANSION LIQUID LINE ORIFICE HOUSING HOUSING VALVE...
- Page 6 STEP 2 – REFRIGERANT PIPING – Brazing Procedures CAP AND CORE REMOVAL CUT AND DEBUR Cut ends of the refrigerant lines square (free from nicks or dents) Remove service cap and core from and debur the ends. The pipe must remain round. Do not crimp end both the vapor and liquid line service of the line.
- Page 7 WRAP SERVICE VALVES To help protect service valve seals during brazing, wrap water-saturated cloths around service valve bodies and copper tube stubs. Use additional water-saturated cloths underneath the valve body to protect the base paint. FLOW NITROGEN Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and out of the vapor valve stem port.
- Page 8 STEP 2 – REFRIGERANT PIPING – Install Indoor Expansion Valve This outdoor unit is designed for use in systems that include an expansion valve metering device (purchased separately) at the indoor coil. See the EL17XP1 Product Specifications bulletin (EHB) for approved expansion valve kit match-ups and application information.
- Page 9 STEP 3 – LEAK TEST AND EVACUATION LEAK TEST HIGH MANIFOLD GAUGE SET OUTDOOR UNIT TO VAPOR SERVICE VALVE NOTE - Position canister to deliver liquid refrigerant. NITROGEN HFC-410A CONNECT GAUGE SET A - Connect the high pressure hose of an HFC-410A manifold gauge set to the vapor valve service port. NOTE - Normally, the high pressure hose is connected to the liquid line port.
- Page 10 EVACUATION HIGH CONNECT GAUGE SET NOTE - Remove cores from service valves (if not already done). A - Connect low side of manifold gauge set with 1/4 SAE in-line tee to vapor line service valve B - Connect high side of manifold gauge set to OUTDOOR MANIFOLD liquid line service valve...
- Page 11 WARNING STEP 4 – ELECTRICAL – Circuit Sizing and Wire Routing Fire Hazard. Use of aluminum wire with this product may result in a fire, causing property damage, severe injury In the U.S.A., wiring must conform with current local codes and the current National Electric Code (NEC).
- Page 12 LOW VOLTAGE CONNECTIONS HIGH VOLTAGE FIELD WIRING LOW VOLTAGE (24V) FIELD WIRING WIRE RUN LENGTH AWG# INSULATION TYPE LESS THAN 100' (30 METERS) TEMPERATURE RATING 24VAC MORE THAN 100' (30 METERS) 35ºC MINIMUM. CONNECTIONS NOTE - For proper voltages, select thermostat wire (control wires) gauge per table above.
- Page 13 Typical 24VAC Control Wiring Diagrams (Field Installed) THERMOSTAT INDOOR UNIT OUTDOOR UNIT OUTDOOR UNIT THERMOSTAT INDOOR UNIT 24V POWER 24V POWER COMMON COMMON EMERGENCY COMMON COMMON HEAT RELAY OUTDOOR EMERGENCY 1ST STAGE 1ST STAGE HEAT THERMOSTAT AUXILIARY AUXILIARY HEAT HEAT 1ST STAGE 1ST STAGE AUXILIARY...
- Page 14 Torque Requirements OPERATING ANGLE-TYPE SERVICE VALVE When servicing or repairing heating, ventilating and air 1 - Remove stem cap with an appropriately sized wrench. conditioning components, ensure the fasteners are appro- priately tightened. Table 2 lists torque values for fasteners. 2 - Use a service wrench with a hex-head extension (3/16"...
- Page 15 NOTE – The demand defrost control accurately measures Checking Refrigerant Charge the performance of the system as frost accumulates on the outdoor coil. This typically will translate into longer running The EL17XP1 unit is factory-charged with enough HFC- time between defrost cycles as more frost accumulates on 410A refrigerant to accommodate a 15-foot length of the outdoor coil before the demand defrost control initiates refrigerant piping.
- Page 16 HIGH PRESSURE SWITCH (S4) LOW PRESSURE SWITCH (S87) This unit is equipped with a high pressure switch which is This unit is equipped with a low pressure switch which located on the liquid line. The SPST, normally closed pres- is located on the suction line. The SPST, normally open sure switch opens when liquid line pressure rises above pres sure switch opens when suction line pressure falls the factory setting of 590 + 15 psig and automatically re-...
- Page 17 This is quite • Have your Lennox dealer show you where your indoor different from gas- or oil-fired furnaces or an electric fur- unit filter is located. It will be either at the indoor unit...
- Page 18 In coastal areas, the coil should be cleaned with any time the unit is in operation. If you are unsure about potable water several times per year to avoid corro- the filter required for your system, call your Lennox dealer sive buildup (salt). for assistance.
- Page 19 4 - Inspect the indoor coil drain pans and condensate motor. Replace as necessary. drains for rust, debris, obstructions, leaks or cracks. 9 - If your heat pump is matched with a gas- or oil-fired Pour water in pans to confirm proper drainage from furnace for auxiliary heating, indoor unit service the pan through to the outlet of the pipe.
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Questions and answers
Which dip switch will increase the Manual speed of my indoor blower fan for my EL16XP1`-48 heat pump by 10 or 20 percent? It powers my Healthy air 16 merv filter box. It is not shown on the service manual.