Lennox CH33 User Manual

INSTALLATION

,t_2007 Lennox Industries Inc.

Dallas, Texas, USA

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE

®

WARNING

INSTRUCTIONS

CH33 Series Units

EVAPORATOR COILS
505,264M (65484504)

10/07
Supersedes 09/06

CH33 Series Coils ............................. 1

General ...................................... 1

Shipping and Packing List ...................... 1

Releasing Air Charge .......................... 2

Unit Installation ............................... 2

Refrigerant Line Set ........................... 3

Connections .................................. 4

Refrigerant Metering Device .................... 4

Leak Testing, Evacuating and Charging .......... 6

Blower Speed Connection ...................... 6

Condensate Drain Connection .................. 7

Maintenance .................................. 7

_puTeCh ical

n

blications

Litho U.S.A.

WARNING

CAUTION

IMPORTANT

CH33 horizontal evaporator coils are designed for use with
air conditioner or heat pump units. Each coil is equipped

with a compression fitting that provides convenient field

installation of a refrigerant metering device. Either a
refrigerant metering orifice (factory installed in coils and

provided with some Lennox air conditioner units) or a
thermostatic expansion valve (ordered separately) may be

used in air conditioner unit applications. A check
expansion valve (ordered separately) is the only metering

device approved for use in heat pump applications.
Refer to the CH33 Engineering Handbook for proper use of

these coils with Lennox furnaces, air conditioner units,
heat pumps and line sets.

These instructions are intended as a general guide and do
not supersede local or national codes in any way. Consult

authorities who have jurisdiction before installation.

Package 1 of 1 contains the following:

1 -- CH33 evaporator coil

Check the components for shipping damage. If you find
any damage, immediately contact the last carrier.

10/07

[[IHHI[IIIII[HI[[III[IIIH[[II[[III

Page 1

505,264M (65484504)

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Table 1. Orifice Size Shipped with CH33

Model Number. Orifice Size

CH33-18A-2F 0.053
CH33-19A-2F 0.053
CH33-24/30A-2F 0.062
CH33-25A-2F 0.062

CH33-25B-2F 0.062
CH33-31A-2F 0.071
CH33-31 B-2F 0.071
CH33-36A-2F 0.076
CH33-36B-2F 0.076
CH33-36C-2F 0.076

CH33-42B-2F 0.082
CH33-43B-2F 0.082
CH33-43C-2F 0.082
CH33-44/48-2F 0.082
CH33-48C-2F 0.091
CH33-49C-2F 0.091

CH33-50/60C-2F 0.091
CH33-60D-2F 0.099
CH33-62D-2F 0.099

1, Install the furnace per the installation instructions

provided with the unit.

2, Place a field-provided heat shield, such as a wet rag,

against the piping plate and around the piping stubs,
and sweat in the suction line. The heat shield must be

in place to guard against heat damage to the paint.

NOTE - In areas of high humidity, the suction line section in
the air stream in the cabinet should be insulated with foam

tape. See figure 1.

FOAM
TAPE

CAUTION

The CH33 coil are shipped with a 15+ 3 psi dry air holding
charge. Ensure that the coil is void of pressure by

performing the following procedure:

a WARNING

1. Remove valve stem cap,

2, Press the liquid line valve stem,

NOTE - If there is no pressure when the valve core is

pressed, check the coil for leaks before continuing with the

installation,

Figure 1. Discharge End of Coil

3, Left-Hand and Right-Hand Discharge--The coil

must have a 1/2" slope from the rear of the cabinet
to the drain. Position the coil adjacent to the furnace
cabinet and align the six screw clearance holes in the
coil casing with the furnace engagement holes. Use

six field-provided #8 X 1" screws to secure the coil
casing to the furnace (see figures 2 and 3),

4, Right-Hand Air Discharge with Field-Provided

Spacer--The coil must have a 1/2" slope from the
rear of the cabinet to the drain. Position the coil in

I

the left-to-right configuration connection on the
service access side of the furnace (see figure 4).

Position the field-provided spacer between the
furnace and the coil. Use field-provided screws to
secure the coil casing, spacer and the furnace

together. The spacer should be long enough to allow
room for proper installation (approximately six inches
minimum).

NOTE: When the coil is connected directly with a
condensing furnace, the coil must be level from return end
to supply end. The front (access side) of the furnace may
be pitched down up to one-inch to accommodate a 1/2"
pitched coil.

5, Secure the supply duct to the coil cabinet,
6, Refer to the instructions provided with the condensing

unit for leak testing, evacuating and charging
procedures. Always check the entire system for

leaks before charging.

7, Applications using CH33-62 "D" width unit with

"C" width furnace--Figure 5 shows an application
that includes a "D" width coil and a "C" width furnace.

This application requires an insulated, field-supplied
block-off plate be constructed to cover the open space

on the coil housing,

505264M 10/07

Page 2

Coil _ "Air Unit

Back

Slope 112"
(13 mm) Coil

_ Drain

_l (Supply Air End View)

Supply Test Hole Supply Air Unit Rear

Front

90% Gas

Furnace Drain

Figure 2. Left-Hand Air Discharge

Supply Air Unit Rear Plumbinq Connections Supply Air Unit _. [' Coil

Plumbing
Connections

Supply Air b
Unit Front

Slope 1/2"

Supply Air Unit Front

Coil
Front

Supply Air Unit Front

Supply Air Unit Rear

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\ /

Supply Air Unit Front

Field-fabricated
insulated

block-of[ plate

Supply Air
Unit Rear

Test
Hole

II T/i

Test Hole

NOTE - Use of this orientation is acceptable for 80% AFUE
furnaces. Do not use this orientation for 90% condensing furnaces.

Figure 3. Right-Hand Air Discharge

Test Hole

.....

Plumbing Connections

Spacer
(6 in. 152 mm min.)

Figure 4. Right-Hand Air Discharge with Spacer

Sealing Ducts - Ensure ducts are secured and all joints
properly sealed to either the coil cabinet flanges or the

furnace cabinet flanges.

Drain

(Supply Air End View)

IMPORTANT

Plumbing
Connections

SupplyAir

Unit Front

Figure 5. "D" Width Coil wl"C" Width Furnace

Leak Testing, Evacuating,Charging - Refer to the
instructions provided with the outdoor unit for leak testing,

evacuating and charging procedures. Always leak check
entire system before charging.

The refrigerant line sets should be sized according to the
recommendations given in the outdoor unit installation

instructions. See table 1 for sweat connection sizes. A

field-provided adapter may be required to match line set

connections.

Page 3

CH33 SERIES