LENNOX Evaporator Coils Manual L0806272

User Manual: LENNOX LENNOX Evaporator Coils Manual LENNOX Evaporator Coils Owner's Manual, LENNOX Evaporator Coils installation guides

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LEMV

,1,_,2008Lennox Industries Inc.

Dallas, Texas, USA

d) I

RETAIN THESE INSTRUCTIONS

FOR FUTURE USE

The Lennox CH23 series horizontal coils are designed for

installation with a horizontal furnace and a matched remote

outdoor unit. These units are for indoor installation only.

Refer to the Lennox engineering handbook for match-up

information.

These instructions are intended as a general guide and do

not supersede local or national codes in any way. Authori-

ties having jurisdiction should be consulted before installa-

tion.

Check contents for shipping damage. If any damage is

found, contact the last carrier immediately.

WARNING

INSTALLATION

INSTRUCTIONS

CH23 Series Coils

HORIZONTAL EVAPORATOR COILS

503,486M

04/08

Supersedes 03/00 _pu Technical

blications

CH23 Series Coil ............................... 1

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

CH23 Coil Dimensions .......................... 2

Shipping & Packing List ......................... 2

Installation .................................... 2

CH23 Refrigeration Systems ..................... 3

Refrigerant Line Connections .................... 3

Condensate Drain Connections .................. 4

Evaporator Coil Air Pressure Drop ................ 4

Clean-Up ...................................... 5

AIMPORTANT

WARNING

Page 1

(102)

(305)

1-1/8

(29) 4-1_ _2.1/2

(102) rq- (64)

FRONT VIEW

3/4

2-1/4

(57)

SUCTION

LINE

LIQUID

LINE

23 E

(584)

_ (89)_D3"1/2

iiiiiiiiiiiii_i

HHHHHH_

iiii

CONDENSATE

DRAINS

Model No.

CH23-21

CH23-31

CH23-41

CH23-51

CH23-65

CH23-68

END VIEW

A B

in. mm in. mm

27 686 22-3/4 578

31 787 26-3/4 679

35 889 30-3/4 781

41 1041 36-3/4 933

47 1194 42-3/4 1086

3/4 IP

,(19)

3/4

(19)

Package 1 of 1 contains the following:

1- Coil cabinet assembly

1- Bag assembly containing the following:

1-Suction line elbow with equalizer port

1-90 <_liquid line stub

1-O-ring

1-Heat shield

1-3/8 inch x 5/16 inch reducer coupling (-21, -31 only)

1-7/8 inch x 5/8 inch reducer bushing (-21, -31 only)

1-7/8 inch x 3/4 inch reducer bushing (-41 only)

Check equipment for shipping damage. If you find any

damage, immediately contact the last carrier.

NOTE -To remove the coil from its casing after installation,

remove the two shipping screws from the coil flange. See

figure 1.

Remove the two shipping

screws from the coil flange. The

coil can't be removed from the

case if the screws are present

FIGURE 1

1- CH23 cabinet must be installed for horizontal air flow.

NOTE -Coils are designed for air flow from either di-

rection.

2- Use field-fabricated transitions or adaptors (recom-

mended 18 inches min. width) to connect CH23 and

blower unit.

3- Connect supply and return duct work.

Page 2

CH23coilsarefactoryequippedwithafittingthatmayin-

corporateeitheran RFCIVmeteringdevice(orificeorbul-

let)oranexpansionvalve.

A90<_liquidlinestubandano-ring(providedinthebag

assembly)areusedwith thesealnutto accommodate

installationofeitherrefrigerantmeteringdevice.

Alsoshippedwiththecoilisa90° suctionlineelbowwith

a 1/4inchporttofacilitatetheuseofanexpansionvalve.

Thesizeof thesuctionlineelbowallowsthesuctionline

pipingtoberoutedasdesiredandallowsroomtoinstallthe

TXVbulbcloseto theportbeforeinsulating.

ForRFCapplications,usetheorificeshippedwiththecon-

densingunitto ensurepropermatch-up.

ForTXVapplications,referto theengineeringhandbook

heatpumporcondensingunitdataforappropriateexpan-

sionvalvepartnumber.

LiquidlineconnectionsonCH23unitsare3/8inchsweat

connections.Suctionlineconnectionson CH23unitsare

7/8inchsweatconnections.Applylinesetsandrefrigerant

controldevicestocorrespondwithmatchingremotecon-

densingunit.

NOTE - CH23 evaporators use nitrogen or dry air as a

holding charge. If there is no pressure when you remove

the rubber plugs (step 2), check the coil or line set for leaks

before installing. After installation, pull a vacuum on the

line set and coil before releasing the outdoor unit charge

into the system.

RFC Applications

1- Remove plastic cap from distributor's orifice body.

2- Install one of the o-rings supplied to the distributor ori-

fice body. See figure 2.

3- Install the refrigerant metering device (bullet) shipped

with the condensing unit into the distributor orifice

body and the liquid line seal nut section.

RFCIV INSTALLATION

__ ORIFICE

.----- O-RING

(USE ONE ONLY)

"BULLET"

ORIFICE /

SEAL

NUT SWEAT

CONNECTION

FIGURE 2

4- Place heat shield against the piping plate and around the

suction line connection. Heat shield must be in place to

guard against damage to the paint.

5- With heat shield in place, sweat in suction line. Suction

line elbow service port has no core. Secure cap to port

to prevent leakage. After procedure is completed, re-

move heat shield.

6- Refer to instructions provided with condensing unit for

leak testing, evacuating and charging procedures.

TXV Applications

1 - Loosen the liquid line seal nut at the point that the liq-

uid line exits the coil.

2 - Remove and discard the rubber grommet and metal

slug from the inside of the seal nut.

3 - Slide the liquid line stub (provided in the bag assem-

bly) through the seal nut.

4 - Braze the liquid line to the liquid line stub/seal nut as-

sembly.

5 - Apply a small amount of refrigerant oil to the O-ring

(provided in the bag assembly) and install it on the liq-

uid line orifice housing. Insert the stubbed end of the

expansion valve into the liquid line orifice housing and

tighten the expansion valve seal nut. See figure 3.

6 - Apply a small amount of refrigerant on the provided

Teflon washer provided with the expansion valve kit.

Install the washer on the threaded side of the expan-

sion valve. Tighten the liquid line seal nut on the

threads of the expansion valve. See figure 3.

7 - Place the provided heat shield over the piping plate

and around the suction line connection.

8 - With the heat shield in place, sweat in suction-line el-

bow (provided) and the suction line.

9 - Attach the expansion valve sensing bulb on a a hori-

zontal section of the suction line in the 2, 4, 8, or 10

o'clock position. The position of the sensing bulb is

critical to ensure that the systems performs prop-

erly. Refer to figure 4.

NOTE -Do not position the sensing bulb at the bottom

of the suction line. The refrigerant/oil mixture will not

allow a true temperature reading to be transferred to

the sensing bulb.

10 - Refer to the instructions that are provided with the con-

densing unit for leak testing, evacuating, and charging

procedures.

Page 3

TYPICAL EXPANSION VALVE

EXPANSION

VALVE

(LB-85663A-E Shown)

TEFLON O-RING (SUP-

PLIED WITH KIT)

CONNECT

LIQUID LINE

SET HERE

TEFLON O-RING

(SUPPLIED WITH KIT)

DISTRIBUTOR

ASSEMBLY

COIL STUB END

OF VALVE

SENSING

BULB

(ATTACH TO

SUCTION LINE)

EQUALIZER CONNECTION

(SECURE TO EQUALIZER

PORT ON SUCTION LINE)

FIGURE 3

NOTE -After you have installed the valve, insulate the

complete valve to prevent sweating.

Bulb Location in the Suction Line

Suction Lin_

2 o'clock

10 o'clock 8

FIGURE 4

CH23 coil has both main and auxiliary drains, Auxiliary

drain removes condensation should main drain become

plugged, Refer to figure 5 for auxiliary and main drain loca-

tions,

NOTE -It is recommended a trap be provided in the main

drain line, If a vent tee is required in the line, the trap should

be between the unit outlet and the vent tee,

AUXILIARY

DRAIN

DRAIN CONNECTIONS

SUCTION

NNECT'°N

IQUID

NNECTION

N DRAIN

FIGURE 5

Make drain connections from 3/4 inch pipe nipples using

condensate lines of the same size, Pitch main drain down

to an open drain or sump, Connect auxiliary drain to an ex-

posed drain which can be readily noticed by owner,

1- Drain piping should not be smaller than drain connec-

tions at drain pan,

2- Install trap in condensate line, Trap must be deep

enough to offset difference in static pressure between

drain pan and atmosphere. Generally 2 inches (51

mm) is satisfactory for medium static applications. Re-

fer to figure 6,

Typical Condensate Drain

VENT MUST EXTEND ABOVE THE HEIGHT OF THE COIL"

DRAIN PAN BY 2 INCHES (51 MM). VENT

DRAIN PAN

TRAP MUST BE DEEP ENOUGH TO OFFSET

MAXIMUM STATIC DIFFERENCE (GENERALLY,

2 INCHES [51MM]).

DRAIN LINE SHOULD SLOPE A MINIMUM 1 INCH PER

10 FEET (25 MM PER 3 M) TO APPROVED DRAIN

FIGURE 6

3- Horizontal runs must be pitched down 1 inch per 10

feet (25 mm per 3 m) of drain line for proper conden-

sate flow.

4- An open vent in the drain line may be required due to

line length friction and static pressure.

Page 4

5- Drainsshouldbeconstructedinamannerthatwillfacil- 2-

itatefuturecleaning.

6- Auxiliarydrainshouldruntoanareawherehomeown-

erwillnoticeit draining.Theauxiliarydrainlinedoes 3-

notrequiredventingoratrap,Referto localcodes,

1- Drilltestholesinsupplyductto readpressuredrop

acrossCH23coil.Seefigure7.

Connectdraftgaugewithzeroendofscaleatairenter-

ingsideofcoil.Insert1/4inch(6mm)oftestholesin-

sidecabinet,Sealaroundtesthosewithpermagum,

AIR TEST HOLE LOCATIONS

BLOWER AIR TEST HOLES

UNIT \

_ I -_ \ ClENTcEcRNPNLEUc_IBoING

I I /\1 HORIZONTALLY

MANOMETER

FIGURE 7 TABLE 1

DRAFT GAUGE READING (DRY EVAPORATOR)

400 CFM/190 L/S PER TON

Table 1 lists a range of air volumes and equivalent draft

gauge readings, as well as maximum operating CFM

Observe draft gauge readings with blower access pan-

el in place and blower operating, If reading is low, close

adjustable pulley or wire direct drive blower to higher

speed. If reading is high, open adjustable pulley or wire

to a lower blower speed, Close blower access panel

each time to eliminate false readings.

1- Insulate refrigerant connections at CH23 coil system

suction line, Use a wrap-around insulation.

2- Set room thermostat at desired setting,

3- Pick up all shipping cartons, metal scraps, extra insula-

tion and clean up the installation area,

Air Volume Total Resistance

Model No. cfm L/s in. w.g. Pa

600 285 .05 12

CH23-21 800 380 .07 17

CH23-31 1000 470 .04 10

CH23-41 1200 565 .09 22

CH23-51 1600 755 .17 42

1800 850 .20 50

CH23-65 2000 945 .24 60

CH23-68 2200 1040 .28 70

2400 1135 .32 80

Page 5

LENNOX Evaporator Coils Manual L0806272

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