Table of Contents
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RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
General
This XP20 outdoor heat pump is designed for use with
HFC-410A refrigerant only. This unit must be installed with
an approved indoor air handler or coil. See the Lennox
XP20 Product Specifications bulletin (EHB) for approved
indoor component match-ups.
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
IMPORTANT: BEFORE APPLYING ANY POWER (MAIN OR LOW
VOLTAGE) TO THE OUTDOOR UNIT, THE FIELD MUST CONFIRM
®
iComfort Wi-Fi
THERMOSTAT HAS VERSION 2.1 OR HIGHER
SOFTWARE.
(REFER
TO iComfort Wi-Fi
MANUAL.)
THIS UNIT IS A INTEGRAL COMPONENT OF A SYSTEM THAT
WILL REQUIRE AN iComfort Wi-Fi
®
iComfort
-enabled AIR HANDLER OR FURNACE.
iComfort Wi-Fi
thermostat
XP20
STEP 1 -- SETTING THE UNIT -- Clearances
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NOTES
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NOTICE: Specific applications may require adjustment of the listed installation clearances to provide protection for
the unit from physical damage or to avoid conditions which limit operating efficiency. (Example: Clearances may
have to be increased to prevent snow or ice from falling on the top of the unit. Additional clearances may also be
required to prevent air recirculation when the unit is installed under a deck or in another tight space.)
E2018 Lennox Industries Inc.
Dallas, Texas, USA
®
THERMOSTAT
®
THERMOSTAT AND
®
®
iComfort
-enabled
air handler or
furnace
See
NOTES
See
Control
Box
INSTALLATION
INSTRUCTIONS
Elite
Series XP20 Units
®
HEAT PUMP
507508-01
7/2018
OUTDOOR UNIT
For more in-depth information, consult the Installa
tion and Service Procedures manual, available as
Corp. 1408-L10 on DaveNet or through the Technical
Support department at 800-453-6669.
Improper installation, adjustment, alteration, ser
vice or maintenance can cause property damage,
personal injury or loss of life.
Installation and service must be performed by a li
censed professional installer (or equivalent) or ser
vice agency.
NOTES:
Service clearance of 30 in. 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.
Clearance to one of the remaining two sides may be 12 in. and the
final side may be 6 in.
A clearance of 24 in. must be maintained between two units.
48 in. clearance required on top of unit.
FIGURE 1
Page 1
PACKING LIST
WARRANTY
CERTIFICATE
CONNECTOR (1)
NOTICE !
WARNING
RAST 6-PIN
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Table of Contents
Related Manuals for Lennox Elite XP20-024-230
Summary of Contents for Lennox Elite XP20-024-230
- Page 1 This XP20 outdoor heat pump is designed for use with PACKING LIST HFC-410A refrigerant only. This unit must be installed with an approved indoor air handler or coil. See the Lennox XP20 Product Specifications bulletin (EHB) for approved indoor component match-ups.
- Page 2 STEP 1 -- SETTING THE UNIT (Continued) -- Dimensions / Placement UNIT DIMENSIONS - INCHES (MM) LIQUID LINE CONNECTION ELECTRICAL INLETS SUCTION LINE CONNECTION 4-3/4” 4-1/2” (121) (108) TOP VIEW SIDE VIEW UNIT SUPPORT FEET XP20-024 TO -060 BASE WITH ELONGATED LEGS Model Number XP20-024-230 39 (991)
- Page 3 NOTICE ! ELEVATED SLAB MOUNTING USING FEET Roof Damage! EXTENDERS This system contains both refrigerant and oil. Some Use additional 2" SCH 40 male rubber roofing material may absorb oil, causing the threaded adapters which can rubber to degrade. Failure to follow this notice be threaded into the female could result in damage to roof surface.
- Page 4 STEP 2 – REFRIGERANT PIPING – IMPORTANT ! Flushing Existing Line Set & Indoor Coil Some scroll compressors have an internal vacuum lush the existing line set per industry standards. For protector that will unload scrolls when suction pres sure goes below 20 psig. A hissing sound will be heard more information, refer to the XP20 Installation and when the compressor is running unloaded.
- Page 5 Table 1. Standard Refrigerant Line Set — Up to 50 Linear Feet in Length Inches (mm) Model Number (-xx*) Valve Size Connections Recommended Line Sets Liquid Line Suction Line L15 Line Set Model Model Number (-xx*) Line Set Length Catalog Number XP20-024-230-XX 3/8”...
- Page 6 STEP 2 -- REFRIGERANT PIPING -- Removing Existing Indoor Metering Device 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 DISTRIBUTOR TUBES (UNCASED COIL ONLY) ORIFICE EXPANSION LIQUID LINE ORIFICE HOUSING...
- Page 7 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 suction and liquid line service of the line.
- Page 8 STEP 2 -- REFRIGERANT PIPING -- Brazing Procedures (Continued) 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 suction / vapor valve stem port.
- Page 9 STEP 3 -- INSTALLING INDOOR CHECK / EXPANSION VALVE This outdoor unit is designed for use in systems that include an expansion valve metering device. See the XP20 Product Specifications bulletin (EHB) for approved expansion valve kit match-ups and application information. The expansion valve can be installed internal or external to the indoor coil.
- Page 10 STEP 4 -- LEAK TEST AND EVACUATION 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 11 STEP 4 -- LEAK TEST AND EVACUATION (Continued) EVACUATION HIGH CONNECT GAUGE SET NOTE - Remove cores from service valves (if not already done). Connect low side of manifold gauge set with 1/4 SAE in-line tee to vapor line service valve Connect high side of manifold gauge set to OUTDOOR MANIFOLD...
- Page 12 STEP 5 -- ELECTRICAL -- Circuit Sizing and Wire Routing In the U.S.A., wiring must conform with current local codes and the cur IMPORTANT ! rent National Electric Code (NEC). In Canada, wiring must conform with current local codes and the current Canadian Electrical Code (CEC). If unit is equipped with a crankcase heater, it should be energized 24 hours before unit start-up to prevent com...
- Page 13 STEP 5 -- ELECTRICAL -- Master Control Jumper and Terminals 7-SEGMENT DISPLAY PUSH BUTTON PUMP DOWN - WHEN UNIT IS IN PUMP DOWN MODE, Pd WILL BE DISPLAYED ON 7-SEGMENT. TO ACTIVATE PUMP DOWN MODE, THE CONTROL MUST BE IN THE IDLE STATE, AND THE PUMP DOWN JUMPER PLACED ACROSS THE TWO PUMP DOWN PINS.
- Page 14 ROUTE CONTROL WIRES Maximum length of wiring (18 gauge) for all connections on the RSBus is 1500 feet (457 meters). Wires should be color-coded, with º º a temperature rating of 95 F (35 C) minimum, and solid-core (Class II Rated Wiring). All low voltage wiring must enter unit through field-provided field-installed grommet installed in electrical inlet.
- Page 15 Heat Pump Control -- Defrost Operation IMPORTANT ! Room thermostat must be turned down at least 5°F A full description of the heat pump control can be found in from set point so charging occurs with system the detailed installation and service procedure manual operating at 100% capacity.
-
Page 16: Homeowner Information
The system should be inspected and serviced before each any time the unit is in operation. If you are unsure about the cooling and heating season by a licensed professional filter required for your system, call your Lennox dealer for HVAC service technician (or equivalent). assistance. - Page 17 Outdoor Unit or cracks. Pour water in pans to confirm proper drain age from the pan through to the outlet of the pipe. A. Inspect component wiring for loose, worn or damaged Clean or replace as necessary. connections. Also check for any rubbing or pinching of wires.
- Page 18 IMPORTANT This performance check is ONLY valid on systems that have clean indoor and outdoor coils, proper airflow over coils, and correct system refrigerant charge. All components in the system must be functioning properly to correctly perform compressor operational check. (Accurate measurements are critical to this test as indoor system loading and outdoor ambient can affect variations between low and high capacity readings).