Lennox Merit ML17XC1-060-230A User Manual

©2022 Lennox Industries Inc.
Dallas, Texas, USA
Page 1
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
General
This ML17XC1 outdoor air conditioner with all-aluminum
coil is designed for use with HFC-410A refrigerant only.
This unit must be installed with an approved indoor air han-
dler or coil. For AHRI Certied system match-ups and ex-
panded 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 jurisdiction 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 on LennoxPros.com or through the
Technical Support department at 800-453-6669.
INSTALLATION
INSTRUCTIONS
AIR CONDITIONER
508254-01
4/2022
Merit
®
Series ML17XC1 Units
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.
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 15 in this
instruction for information.
STEP 1 – SETTING THE UNIT – Clearances
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).
Clearance to one of the remaining two sides may be 12 in. (305
mm) and the final side may be 6 in. (152 mm).
A clearance of 24 in. must be maintained between two units.
48 in. (1219 mm) clearance required on top of unit.
See
NOTES
See NOTES
See NOTES
See
NOTES
CONTROL
BOX
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.)
FIGURE 1

Lennox Merit ML17XC1-060-230A Specifications

General

SEER Rating	17
HSPF	Not Applicable
Refrigerant	R-410A
Compressor Type	Scroll
Phase	1
Type	Air Conditioner
Cooling Capacity	60, 000 BTU/hr
Stages	Single-Stage
Voltage	230V
Sound Level	76 dB

Summary

Setting the Unit Clearances

Unit Placement Guidelines

Provides guidance on the proper placement and clearance requirements for the outdoor unit.

Refrigerant Piping: Flushing Line Set and Indoor Coil

Liquid Line Filter Drier Installation

Instructions for installing the liquid line filter drier to ensure a clean, moisture-free system.

Fixed Orifice Removal

Procedure for removing the existing fixed orifice metering device from the indoor coil.

Expansion Valve Removal

Procedure for removing the existing expansion valve metering device from the indoor coil.

Connect Gauges for Flushing

Steps to connect gauges and equipment for the refrigerant line flushing procedure.

Flushing Existing Line Set

Detailed procedure for flushing the existing refrigerant line set and indoor coil.

Indoor Expansion Valve Installation Steps

Detailed steps for installing the expansion valve unit at the indoor coil.

Sensing Bulb Installation Guide

Instructions for correctly installing the sensing bulb on the vapor line.

Equalizer Line Connection

Leak Test and Evacuation Procedures

Connect Gauge Set for Leak Test

Perform Leak Test

Connect Gauge Set for Evacuation

Evacuate the Refrigerant System

Procedure for evacuating the line set and indoor unit to the required vacuum level.

Electrical: Circuit Sizing and Wire Routing

Service Disconnect Switch Installation

Thermostat Installation Guidelines

Route High Voltage and Control Wiring

Unit Start-Up Procedures

Manifold Gauge Set and Service Valves Operation

Information on operating manifold gauge sets and different types of service valves.

Service Port Access and System Charge

Check and Add System Refrigerant Charge

Guidance on checking and adjusting the system's refrigerant charge.