Lennox EL16XC1S036 User Manual

Page 1
Corp. 1503-L7
EL16XC1
Service Literature
INSTALLATION AND SERVICE PROCEDURE
August 29, 2016
EL16XC1 (HFC-410A) SERIES UNITS WITH ALL-ALUMINUM COIL
This literature is intended as a general guide and does not
supersede local codes in any way. Consult authorities who
have jurisdiction before installation.
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
IMPORTANT
This unit must be matched with an indoor coil as speci
fied in Lennox EL16XC1 Engineering Handbook. Coils
previously charged with HCFC-22 must be flushed.
WARNING
Electric Shock Hazard. Can cause injury
or death. Unit must be grounded in
accordance with national and local
codes.
Line voltage is present at all
components when unit is not in
operation on units with single‐pole
contactors. Disconnect all remote
electric power supplies before opening
access panel. Unit may have multiple
power supplies.
TABLE OF CONTENTS
Model Number Identification 2....................
Typical Serial Number Identification 2..............
Specifications 2.................................
Electrical Data 3................................
Unit Dimensions 4...............................
Unit Parts Arrangement 5........................
Operating Gauge Set and Service Valves 6.........
Outdoor Unit Placement 8........................
Removing and Installing Panels 10.................
New or Replacement Line Set 11...................
Brazing Connections 14...........................
Flushing Line Set and Indoor Coil 17................
Installing Indoor Metering Device 18................
Leak Test Line Set and Indoor Coil 19...............
Evacuating Line Set and Indoor Coil 20.............
Electrical 21.....................................
System Operation 23.............................
Maintenance 23..................................
Start-Up and Performance Checklist 24.............
Unit Electrical Diagram and Sequence
of Operations 25.................................
Servicing Units Void of Charge 27..................
Unit Start-Up 27.................................
System Refrigerant 27............................
The EL16XC1 air conditioners, which will also be referred
to in this instruction as the outdoor unit, use HFC-410A
refrigerant. This outdoor unit must be installed with a
matching indoor unit and line set as outlined in the Lennox
EL16XC1 Engineering Handbook.
This outdoor unit is designed for use in systems that use
one of the following refrigerant metering devices:
 Expansion valve (TXV)
 Fixed orifice
IMPORTANT: Special procedures are required for
cleaning the aluminum coil in this unit. See page 23 in this
manual for information.

Lennox EL16XC1S036 Specifications

General

Type	Heat Pump
SEER Rating	16
HSPF Rating	9.5
Refrigerant	R-410A
Cooling EER	12.5
Stages	1
Voltage	208/230V
Cooling Capacity (BTU/h)	36000
Maximum Operating Temperature (Cooling)	115°F
Minimum Operating Temperature (Heating)	-5°F
Cooling Capacity	36000 BTU/h
Compressor Type	Single Stage
Heating Capacity (BTU/h)	36000

Summary

Installation and Service Procedure

Critical Safety Information and Warnings

Essential safety warnings and important notices for installation and service personnel.

Unit Identification and Specifications

Electrical Data Details

Electrical Load and Protection Ratings

Details maximum overcurrent protection, rated load amps, and locked rotor amps for the unit.

Service Valve Operation Procedures

Outdoor Unit Placement Considerations

Installation Clearances and Positioning

Refrigerant Line Set Installation

Line Set and Valve Size Recommendations

Service Valve and Line Set Sizing Table

Brazing Connections and Safety

Brazing Safety Precautions and Materials

Critical safety warnings, cautions, and material recommendations for brazing operations.

Brazing Procedure Steps

Preparing and Brazing Line Set to Valves

Brazing Process Support

Flushing Line Set and Indoor Coil

HCFC-22 to HFC-410A Flushing Process

Detailed procedure for flushing existing systems during HFC-410A conversion.

Indoor Metering Device Installation

Expansion Valve Installation and Sensing Bulb Placement

Leak Testing the System

Pressure Testing for Refrigerant Leaks

Procedure for leak testing line sets and indoor coils using nitrogen pressure.

Evacuating the Refrigeration System

Vacuum Pulling and System Evacuation

Steps for evacuating the system to the required micron level to remove moisture and non-condensables.

Low Voltage Control Wiring

Start-Up and Performance Checklist

Pre-Operation Verification and Checks

A comprehensive checklist for ensuring proper unit start-up and operational verification.

Typical Field Wiring Diagrams

Typical Factory Wiring Diagram

Unit Start-Up and Refrigerant Management

Servicing Units Void of Refrigerant

System Refrigerant Charging Procedures

Guidelines for connecting gauge sets and managing system refrigerant charge.

Indoor Airflow and Delta-T Measurement

Checking and Adjusting Indoor Airflow

Determining Refrigerant Charge Method

Calculating and Weighing In Refrigerant Charge

Procedure for calculating total system charge and weighing it in for outdoor units.

TXV System Refrigerant Charging

HFC-410A Approach Method for TXV

Method to charge TXV systems by measuring the approach temperature.

HFC-410A Subcooling Method for TXV

Method to charge TXV systems by measuring liquid line subcooling.

Fixed Orifice System Refrigerant Charging

HFC-410A Superheat Method for RFC

Method to charge fixed orifice systems by measuring suction line superheat.