Table of Contents
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Service Literature
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
components when unit is not in
operation on units with single-pole
contactors.
electric power supplies before opening
access panel. Unit may have multiple
power supplies.
INSTALLATION AND SERVICE PROCEDURE
is
present
at
all
Disconnect
all
remote
Corp. 1503-L7
August 29, 2016
Model Number Identification
Typical Serial Number Identification
Specifications
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Unit Parts Arrangement
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Unit Electrical Diagram and Sequence
of Operations
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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:
S
Expansion valve (TXV)
IMPORTANT : Special procedures are required for
cleaning the aluminum coil in this unit. See page 23 in this
manual for information.
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EL16XC1
TABLE OF CONTENTS
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Table of Contents
Related Manuals for Lennox EL16XC1S036
Summarization of Contents
Model Number and Serial Number Identification
Specifications
Details unit specifications including sound rating, refrigerant charge, and fan dimensions.
Gauge Set and Service Valve Operation
Torque Requirements
Lists recommended torque values for various fasteners and valve caps during service.
Using Manifold Gauge Set
Guidance on selecting and using manifold gauge sets suitable for HFC-410A systems.
Operating Service Valves
Explains the function and operation of liquid and vapor line service valves.
Service Valve Types and Operation
Angle and Ball Valve Operation
Details procedures for operating angle and ball type service valves.
Accessing and Reinstalling Service Ports
Instructions on how to access service ports and properly reinstall caps and stem caps.
Outdoor Unit Placement and Mounting
Positioning Considerations
Factors to consider when selecting the outdoor unit's installation location.
Slab Mounting Procedures
Guidance on preparing and installing the unit on a ground-level slab.
Elevating the Unit
Methods for raising the unit using support feet and adapters.
Removing and Installing Panels
Roof Mounting Considerations
Guidelines for installing the unit on a roof, including clearance and wind barrier advice.
Line Set Installation and Replacement
Refrigerant Line Set
Information on installing or replacing existing refrigerant line sets.
Brazing Connections
Line Set Size and Service Valve Recommendations
Table provides recommended line set sizes and service valve sizes for different models.
Brazing Procedure Steps
Cut and Debur, Cap and Core Removal
Steps for preparing refrigerant lines and removing service valve cores before brazing.
Attach Manifold Gauge Set
Procedure for connecting the manifold gauge set for brazing with nitrogen flow.
Brazing Procedure Continued
Wrap Service Valves and Braze
Instructions on protecting service valves with wet cloths and performing the brazing.
Cool Brazed Joints
Guidance on cooling brazed joints and valve seals after brazing to prevent damage.
Flushing Line Set and Indoor Coil
Fixed Orifice Removal Procedure
Steps for removing a fixed orifice metering device from the indoor coil.
Expansion Valve Removal Procedure
Steps for removing an expansion valve from the indoor coil.
Flushing Procedure Setup
Details on connecting gauges and equipment for flushing the system.
Flushing the System
Procedure for flushing the line set and indoor coil with refrigerant.
Installing Indoor Metering Devices
Indoor Expansion Valve Installation
Instructions for installing an expansion valve kit to the indoor unit.
Sensing Bulb and Equalizer Line Installation
Guidance on correctly installing the sensing bulb and connecting the equalizer line.
Leak Testing the Line Set and Indoor Coil
Connecting Gauge Set for Leak Test
Procedure for connecting manifold gauges and refrigerant cylinder for leak testing.
Performing the Leak Test
Steps for pressurizing the system with nitrogen and checking for leaks.
Evacuating the System
Connecting Gauge Set for Evacuation
How to connect the gauge set, vacuum pump, and nitrogen for system evacuation.
Evacuating the System
Procedure for achieving and verifying the required vacuum level in the system.
Electrical Connections and Thermostat Installation
Circuit Sizing and Disconnect Switch
Guidelines for correctly sizing electrical circuits and installing disconnect switches.
Thermostat Installation
Recommendations for installing the room thermostat in an optimal location.
Unit Low Voltage Wiring
24VAC Control Wiring Diagrams
Diagrams illustrate low voltage control wiring connections for various system configurations.
System Operation and Components
High Pressure Switch
Description of the high-pressure switch function and setpoints.
Crankcase Heater and Thermal Protection
Explanation of the crankcase heater and compressor thermal protection switch operations.
Maintenance Procedures
Outdoor Unit Maintenance
Checklist of inspection and maintenance tasks for the outdoor unit.
Indoor Unit Maintenance
Checklist of inspection and maintenance tasks for the indoor unit.
General System Test
Procedures for performing a general system test with the unit operating.
Servicing Units Void of Charge
Unit Start-Up Procedures
Steps for safely starting up the unit, including pre-energizing the crankcase heater.
System Refrigerant Procedures
Procedures for connecting gauge sets, checking, and adjusting refrigerant charge.
Determining Refrigerant Charge Method
Weigh-In Charging Method
Method for calculating and weighing in the correct refrigerant charge based on unit and line set.
TXV Charging Methods
Approach TXV Method
Procedure for charging TXV systems using the approach temperature method.
Subcooling TXV Method
Procedure for charging TXV systems using the subcooling method.
Fixed Orifice Charging Method
Superheat RFC Method
Procedure for charging fixed orifice systems using the superheat method.
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