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THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
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.
General Information
CK40HT all-aluminum coil horizontal evaporator coils
are designed for use with air conditioners and heat pumps
and are supplied with a factory-installed R454B check/
expansion valve and a factory-installed R454B refrigerant
leak detection system.
The coil drain pan has a maximum service temperature
of 500°F. The drain pan must be at least 2ʺ away from a
standard gas-fired furnace heat exchanger and at least
4ʺ away from any drum-type or oil-fired furnace heat ex-
changer. Closer spacing may damage the drain pan and
cause a leak.
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INSTALLATION
INSTRUCTIONS
CK40HT Series Coils - R454B
INDOOR COILS
508449-01
6/2024
Table of Contents
Model Number Identification ...........................................3
Releasing Air Charge .....................................................4
Installation .....................................................................4
Refrigerant Line Connections ........................................7
Leak Testing, Evacuating and Charging ........................8
Sealing Ducts ..............................................................10
Condensate Drain Connections ...................................10
Blower Speed Selection .............................................. 11
Maintenance ................................................................12
Decommissioning ........................................................12
Refer to the Product Specification bulletin (EHB) for the
proper use of these coils with specific furnaces, outdoor
units and line sets.
These instructions are intended as a general guide and do
not supersede local or national codes in any way. Authorities
who have jurisdiction should be consulted before installation.
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.
IMPORTANT: Special procedures are required for clean-
ing the aluminum coil in this unit. See page 12 in this in-
struction for information.
Leak Detection System installed. Unit must be powered
except for service.
NOTE - This unit CK40HT 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 60335-2-40/CSA C22.2 No. 60335-2-40, or UL 1995/
CSA C22.2 No 236.
Partial units shall only be connected to an appliance suit-
able for the same refrigerant.
Page 1
CAUTION
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Summary of Contents for Lennox CK40HT Series
-
Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS CK40HT Series Coils – R454B INDOOR COILS 508449-01 6/2024 Table of Contents Model Number Identification ...........3 Releasing Air Charge .............4 THIS MANUAL MUST BE LEFT WITH THE Installation ..............4 HOMEOWNER FOR FUTURE REFERENCE Refrigerant Line Connections ........7 IMPORTANT Leak Testing, Evacuating and Charging ......8... - Page 2 WARNING WARNING • Do not use means to accelerate the defrosting pro- For appliances using A2L refrigerants connected via cess or to clean, other than those recommended by an air duct system to one or more rooms, only auxiliary the manufacturer. devices approved by the appliance manufacturer or declared suitable with the refrigerant shall be installed in •...
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Page 3: Model Number Identification
Model Number Identification C K 40 H T - 36 A - 71 Unit Type Minor Revision Number C = Indoor Coil 71 = R454B Cabinet Width A = 14-1/2 in. B = 17-1/2 in. C = 21 in. D = 24-1/2 in. Series Nominal Cooling Capacity 18 = 1.5 tons... -
Page 4: Releasing Air Charge
Fins per inch Shipping Data - lbs. SP EC I FI CAT I ON S 3. 5 TO 4 TON Size Nominal Tonnage Furnace Cabinet Matching Letter Width Coil & Furnace Cabinet Width - in. 17-1/2 17-1/2 Connections Liquid line (OD) sweat - in. Suction line (OD) sweat - in. - Page 5 work taking place, the area around the equipment is to NOTE – All maintenance staff and others working in the be surveyed to make sure that there are no flammable local area shall be instructed on the nature of work being carried out with work in confined spaces being avoided.
- Page 6 Install the furnace or air handler according to the installa- NOTE – When the coil is connected directly with a con- tion instructions provided with the unit. densing furnace, the coil must be level from return end to supply end. The front (access side) of the furnace may be NOTE –...
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Page 7: Refrigerant Line Connections
SUPPLY AIR TEST HOLE SUPPLY AIR UNIT REAR COIL UNIT FRONT BACK (TOP VIEW) FRONT FLOW SLOPE 1/2” AIR FLOW (13 MM) COIL DRAIN PLUMBING CONNECTIONS (SUPPLY AIR END VIEW) FIELD-PROVIDED SPACER 90% GAS FURNACE (6 IN.) SUPPLY AIR UNIT FRONT DRAIN FIGURE 5. -
Page 8: Leak Testing, Evacuating And Charging
NOTE – When installing refrigerant lines longer than 50 that mechanical handling equipment is available, if re- feet, see the Lennox Refrigerant Piping Design and Fab- quired, for handling refrigerant cylinders, and that all rication Guidelines, CORP. 9351-L9, or contact Lennox personal protective equipment is available and being Technical Support Product Applications for assistance. - Page 9 • When removing refrigerant from a system, either for Option 4 - Have a second refrigerant detection sensor installed below the level of the burners (see Secondary servicing or decommissioning, it is recommended good Sensor Installation section). practice that all refrigerants are removed safely. Multiple Systems Installed in Same Space •...
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Page 10: Sealing Ducts
4 - Install a piece of field-supplied Armaflex over the WARNING band clamp and the end of the line set joint sleeve to prevent sweating (see figure 10). There must be an airtight seal between the bottom of the coil and the return air plenum. Use fiberglass sealing strips, caulking, or equivalent sealing method between the plenum and the air handler cabinet to ensure a tight seal. -
Page 11: Blower Speed Selection
OVERFLOW DRAIN LINE ABOVE ALWAYS RUN AN OVERFLOW DRAIN LINE. IF NOT POSSIBLE TO FINISHED ROUTE OVERFLOW DRAIN LINE, INSTALL LOW VOLTAGE SPACE? VENT MUST EXTEND OVERFLOW SWITCH KIT. WIRE SHUT DOWN ABOVE HEIGHT OF COMPRESSOR PER INSTRUCTIONS. COIL DRAIN PAN BY TWO INCHES VENT CLEAN OUT... -
Page 12: Maintenance
Maintenance tubing to fail. NOTICE ! Use of Coil-Furnace System During Construction Lennox does not recommend the use of its coil-furnace Failure to follow instructions will cause damage to system during any phase of construction. Very low return the unit. - Page 13 a) Become familiar with the equipment and its operation. Sensor Maintenance b) Isolate system electrically. It is recommended to check the state of the sensor every 6 months, at the beginning of each cooling and heating c) Before attempting the procedure, ensure that: season.
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