LENNOX Air Handler (indoor Blower&evap) Manual L0805360

User Manual: LENNOX LENNOX Air Handler (indoor blower&evap) Manual LENNOX Air Handler (indoor blower&evap) Owner's Manual, LENNOX Air Handler (indoor blower&evap) installation guides

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Lithe U.S.A.

,1,_2001 Dallas, Texas, USA

INSTALLATION

INSTRUCTIONS

These instructions are for CB17-95, CBH17-95,

CB17-135, and CBH17-135. These instructions are in-

tended as a general guide and do not supersede national

or local codes in any way. Authorities having jurisdiction

should be consulted before installation.

CB17 & CBH17 Series Units

BLOWER COIL UNITS

504,588M F[_) Technical

2102 JJ.LL Publications

Supersedes 504,439M LithoUSA

CB17 blower coil units are designed for indoor vertical ap-

plications only. CBH17 blower coil units are designed for

indoor horizontal applications only. Figure 1 shows a typi-

cal CB17 installation. Figure 2 shows a typical CBH17

installation.

Upflow Installation

Figure 1

,,,!

Suspended Horizontal Installation

Figure 2

IMPORTANT

General Information ............................. 1

CB17 & CBH17 Series Units ..................... 1

Shipping & Packing List ......................... 1

Blower Motor Drive Kit Selection .................. 2

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

Refrigerant Piping Connections ................... 3

Wiring ........................................ 4

Condensate Drain Connection .................... 4

Duct Connections .............................. 4

Determining the Unit's Air Volume ................. 4

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE

Blower Coil Unit

Package 1 of 2 contains the following:

1 - Assembled blower coil unit

1 - Plastic bag -

1 - Distributor

1 - Condensate drain plug

1 - Blower drive belt

3 - Plastic grommets

Blower Motor Drive Kit

Package 2 of 2 contains the following:

1 - Blower motor pulley

1-Blower motor

1 - Plastic bag containing blower motor mounting plate

bolts and washers

Check equipment for shipping damage. If you find any

damage, immediately contact the last carrier.

The blower motor drive kits listed on the unit nameplate and

in table 1 are available for use with the CB17 and CBH17

units.

02/02

IIIHlllllllllllllllllllllllllllllllll Page 1

504,588M

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Table 1

Blower Motor Drive Kits

Nominal Maximum RPM Range of

Motor Usable All Available

Model Horse- Horse- Drive Setups

Number power power @ 1725 RPM

(kW) (kW) Motor Speed

DKB17-95/135

-1.5-2 1.5 (1.1) 1.725 (1.3) 600-820

DKB17-95/135

-1.5-3 1.5 (1.1) 1.725 (1.3) 600-820

*DKB17-95113

5-1.5-4 1.5 (1.1) 1.725 (1.3) 600-820

DKB 17-951135 2 (1.5) 2.30 (1.7) 730-950

-2-6

DKB 17-95/135 2 (1.5) 2.30 (1.7) 730-950

-2-7

*DKB17-95/13 2 (1.5) 2.30 (1.7) 730-950

5-2-8

*Not available for U.L. listed units

** RPM (revolutions per minute)

1 - Remove the blower access panel.

2 - Use the provided bolts and washers to install the

blower motor on the motor mounting plate. See fig-

ure 3.

=

liquidlines

suction _/' _/ :_ ,\

line ]_ [_U_ _ /

Ora'n moun,

blower motor adjusting plate

Figure 3

3 - Make wiring connections per the wiring section and

figure 4,

4 - Install the blower motor pulley and belt,

5 - Adjust the motor mounting plate for proper belt ten-

sion, Ideal tension is the lowest tension at which the

belt will not slip under peak load conditions,

Overtightening the belt will shorten the life of the belt

and bearings.

6 - Tighten the motor mounting plate bolts and recheck

the belt for proper tension.

The coil is divided into two sections, Each section has its

own expansion valve. This configuration allows the use of a

solenoid valve to control the flow of refrigerant into one coil

section, Use this feature for capacity reduction or latent

heat control. If a solenoid valve is used, install it directly

ahead of the expansion valve of the coil section being con-

trolled, Size the solenoid valve for approximately 50 per-

cent of the total evaporator unit capacity.

The sections share a common suction line,

Connect the refrigerant piping from the bottom coil section

to the first-stage condensing unit

The expansion valves are sized specifically for the two

stages, The CB17/CBH17-95 has a 6-ton first-stage ex-

pansion valve and a 4-ton second-stage valve. The

CB17/CBH 17-135 has a 6-ton first-stage expansion valve

and a 4-ton second-stage valve.

Because of the two-section coil configuration, take care in

piping the system. Refer to the condensing unit installation

instructions to select the correct refrigerant lines for these

coils,

NOTE -CB17 and CBH17 series evaporator coils have a

holding charge of nitrogen or dry air If there is no pres-

sure when the rubber plugs are removed, check the coil

or line set for leaks before installing, After installation,

pull a vacuum on the line set before releasing the unit

charge into the system,

1 - Route piping through either side of the unit.

2 - Remove the knockouts from the piping mullion.

Install the rubber grommets into the piping holes,

3 - Remove the plugs from the suction line and from the

two liquid line stubs,

4 - Use the provided distributor if only one liquid line is

present from the condensing unit or heat pump.

5 - Note the location of the factory-installed expansion

valve bulbs. Remove the expansion valve bulbs from

the manifold so that the heat of the torch will not

damage them during brazing.

6 - After connecting the refrigerant piping to the coil suc-

tion and liquid line stubs, replace the expansion

valve bulbs, Ensure that each bulb is tightly clamped

to the suction manifold.

NOTE -The expansion valve bulbs must be rein-

stalled in their original factory location,

Page 2

7- Insulatethesuctionlinewitha tubularslip-oninsula-

tion 2- Installtheplasticbushing,

3- Positiontheboxovertheplasticbushingandsecure

theblowercontactorkit(LB-51207CB),

NOTE -Complete all refrigerant piping connections be-

fore installing the blower contactor kit.

Electrical connections must comply with local codes. See

figure 4 for the blower coil field wiring only. Electrical con-

duit knockouts are provided in the piping mullion,

Remove the knockout,

A

I

4 - Secure the strain relief bushing to the blower motor

wiring box,

NOTE -If an electric heat section has been installed in

the unit, the blower contactor kit is not required. The cab-

inet is equipped with knockouts for the wiring from the

blower motor to the electric heat system.

S4

]rl

K36- I

,A

24V POWER

A

ECON

G

[] wl

W2

DESCRIPTION

[KEY COMPONENT

iB3 MOTOR-BLOWER

[FI FUSE-TRANSFORMER TI

<5,-I CONTACTOR-BLOWER

iK36,-I RELAY-HEAT BLOWER

iK43,-I RELAY-ECONO HEAT

[$42 RELAY-OVERLOAD,BLO.MOTOR

[TI TRANSFORMER-CONTROL

z_REFER TO UNIT RATING PLATE FOR

MINIMUM CIRCUIT AMPACITY AND

MAXIMUM OVERCURRENT PROTECTION

SIZE

USE COPPER CONDUCTORS ONLY

z_FIELD PROVIDEO,24V TRANSFORMER-

45VA MINIMUM REOUIREMENT

z_REFER TO MOTOR SCHEMATIC

FOR PROPER LEAD CONNECTIONS.

z_MAXIMUM LOAD NOT TO EXCEED

4OVA AT 24V,CLASS 2

z_STANDARD WIRING

Z_ OPTIONAL WIRING WHEN

K43 RELAY IS EMPLOYED

24V COMMON

:TTsWIRINGSINGLE

PHASE BLOWER MOTOR Z_542 IS USED ON "M" VOLTAGE

UNITS & UNITS WITH HIGH

_ :__LI _ DENOTES OPT IONAL COMPONENTS

--LINE VOLTAGE INSTALLED AT FACTORY

m m D _LINE VOLTAGE TO BE INSTALLED

LL_ LIJ LU

....

$42Z_? _ WIRING DIAGRAM

ACCESSORIES

CB/CBHU7

WITHOUT ELECTRIC HEAT

SECTION A

Supersedes Form No. | New Form No.

532,210W 553,755W

L[fho U,S,A,

Figure 4

Page 3

Theunitisequippedwithacondensatedrainoutletoneach

side.

1- Installtheprovideddrainpluginthecondensateout-

letthatwillnotbeused,

2- Installcondensatepipingusingproperlysizedfield-

providedfittings,

3_ Installatrapinthedrainlinewherethedrainexits

theunit,

4- Pitchthedrainlinedownwardtotheopendrainor

sump,

NOTE -Never connect the condensate drain to a

closed system,

5 - Use plugged tees where possible to facilitate clean-

ing the drain lines.

If a return air plenum is not used. installation codes may

limit installation to single-story structures only.

Table 2

Do not install the supply air plenum within 18 inches (457

mm) of the blower access panel,

NOTE -Use a flexible duct to eliminate vibration,

NOTE -The indoor coil must be dry and the air filters

must be in place when the following measurements are

taken.

1 - Run the blower without a cooling demand,

2 - Measure the static pressure external to the unit,

3 - Measure the indoor blower motor's rpm,

4 - Refer to tables 2 and 3, Use the static pressure and

rev/min* readings to determine the unit's air volume.

5 - Adjust the unit's air volume at the blower motor

pulley. Loosen the Allen screw, Turn the adjustable

sheave clockwise to increase the air volume or

counterclockwise to decrease the air volume. See

figure 3.

CB17-95V and CBH17-95V Blower Performance with or without Electric Heat

Static Pressure External to the Unit -- Inches Water Gauge (Pa)

0.25 0.35 0.45 0.55 0.65 0.75 0.85

Air

Volume 1.10 1.35

cfm (m3/s) RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP

2000 .... 550 .35 590 .50 630 .55 650 .60 690 .70 720 .75 790 1.05 850 1.30

2500 560 .30 660 .55 630 .65 670 .75 700 .80 730 .90 760 1.00 830 1.30 880 1.40

*3000 625 .75 650 .85 690 .95 720 1.00 750 1.15 775 1.25 800 1.30 ........

3500 685 1.05 715 1.15 740 1.30 770 1.35 800 1.50 825 1.60 840 1.65 ........

4000 750 1.60 775 1.65 800 1.75 825 1.85 850 1.95 875 2.05 900 2.15 ........

NOTE -- Aft data is measured external to the unit with air filters in place.

*3000 cfm (1.416 m3/s) minimum with electric heat.

4000 cfm (1.888 m3ls) @ .35 static pressure maximum with 1.5 horsepower (1.1 kW) motor.

Table 3

CB17-135V and CBH17-135V Blower Performance with or without Electric Heat

Static Pressure External to the Unit -- Inches Water Gauge (Pa)

Air

Volume 0.25 0.35 0.45 0.55 0.65 0.75 0.85 1.10 1.35

cfm (m3/s) RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP

3000 575 .60 610 .70 650 .80 680 .90 725 1.05 750 1.20 790 1.30 860 1.55 925 1.85

3500 620 .80 650 .95 680 1.05 725 1.15 750 1.25 790 1.40 820 1.55 900 1.95 950 2.10

*4000 665 1.10 700 1.20 725 1.30 750 1.40 790 1.55 820 1.70 850 1.90 920 2.15 ....

4500 715 1.40 740 1.55 775 1.70 810 1.80 840 1.95 870 2.10 890 2.25 ........

5000 760 1.80 800 1.95 825 2.15 850 2.30 ....................

NOTE -- Aft data is measured external to the unit with air filters in place.

*4000 cfm (1.888 m3/s) minimum with electric heat.

4500 cfm (2.124 m3/s) @ .45 static pressure maximum with 1.5 horsepower (1.1 kW) motor.

Page 4