Lennox 7ECX Installation Instructions Manual

INSTALLATION INSTRUCTIONS
7ECX
IMPORTANT
Refrigerant Detection System Control (27A02 or 27A03)
must be ordered. For non-communicating furnaces,
order kit 27A02. For communicating furnaces, order kit
27A03. RDS system requires 3 VA additional loading on
low voltage transformer.
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, service agency, or the gas supplier.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
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.
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.
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This manual must be left with the homeowner for future reference
R-454B INDOOR VERTICAL UPFLOW

Table of Contents

Model Number Identification ...........................................3
Releasing Air Charge .....................................................3
Installation .....................................................................3
Refrigerant Line Connections ........................................5
Blower Speed Selection ................................................9
Maintenance ................................................................10
Decommissioning ........................................................ 11
General Information
The 7ECX coil includes an externally equalized factory-in-
stalled R-454B check/expansion valve and a factory-in-
stalled R-454B refrigerant leak detection sensor.
The coil drain pan has a maximum service temperature
of 500°F. The drain pan must be at least 2" away from a
standard gas-fired furnace heat exchanger and at least
4" away from any drum-type or oil-fired furnace heat ex-
changer. Closer spacing may damage the drain pan and
cause a leak.
Refer to the Product Specification bulletin (EHB) for the
proper use of these coils with specific furnaces, air han-
dlers and line sets.
These instructions are intended as a general guide and
do not supersede local or national codes in any way. Au-
thorities who have jurisdiction should be consulted before
installation.
IMPORTANT: Special procedures are required for clean-
ing the aluminum coil in this unit. See page 10 in this in-
struction for information.
Shipping and Packing List
Package 1 of 1 contains:
1 - Evaporator coil
1 - Line set joint sleeve kit
Liquid line sleeve (1)
Suction line sleeve (1)
Band clamps (3)
Suction line insulation tape (1)
Check the components for shipping damage; if found, im-
mediately contact the last carrier.
NOTE - This unit 7ECX is a PARTIAL UNIT AIR CON­
DITIONER, complying with PARTIAL UNIT requirements
of this Standard, and must only be connected to other
units that have been confirmed as complying to corre­
sponding PARTIAL UNIT requirements of this Standard,
UL 60335­2­40/CSA C22.2 No. 60335­2­40, or UL 1995/
CSA C22.2 No 236.
Partial units shall only be connected to an appliance suit­
able for the same refrigerant.
*P508450-01*
Page 1
(P) 508450-01