Lennox LB57113BM Guía de inicio rápido

Page 1

INSTALLATION INSTRUCTIONS FOR LOW AMBIENT CONTROL KIT LB-57113BM (27J00)

USED WITH SINGLE-COMPRESSOR HEAT PUMP UNITS

Litho U.S.A.

502,818M

11/98

Supersedes 3/96

E1998 Le ox I dustries I c.

Dallas, Texas LOW AMBIENT CONTROL KIT

KITS COMMON TO HEATING

AND COOLING EQUIPMENT

INSTALLATION INSTRUCTIONS

SHIPPING AND PACKING LIST

P ck ge 1 of 1 cont ins:

1- Low ambie t pressure switch assembly (S11)

1- 36" (914 mm) le gth of 1/4" (6.35 mm) copper tube

with flare uts

1- Relay

1- 20ĆFoot le gth of wire

4- 20" Le gths of wire

1- Bag assembly each co tai i g:

8-Wire uts

2-Saddle valves

4-#10-16 X 5/8" S.D.S.T. screws

1-Schrader depressor tee with seal cap

APPLICATION

The low ambie t pressure switch (S11) cycles the

outdoor fa while allowi g compressor operatio i the

cooli g cycle. This i termitte t fa operatio results i

a high evaporati g temperature which allows the

system to operate without ici g the evaporator coil a d

losi g capacity. This kit is desig ed for use i ambie t

temperatures o lower tha 30°F.

Le ox recomme ds a belly-ba d style cra kcase heater

(P-8-8852, 240v, 45w) be added to compressors which

do ot have o e. A freezestat (LB-62858CA) should also

be added to a y system usi g a low ambie t kit.

NOTE - Do not use this low ambient kit on units with

capillar tube metering devices. Install an expansion

valve metering device if using this kit.

INSTALLATION

A-Pressure Switch Assembly

1- Disco ect power to u it.

2- Remove compressor compartme t access pa el.

3- I stall valve depressor tee discharge li e gauge port.

4- I stall pressure switch i compressor compartme t

with screws provided. Switch should be i stalled i a

vertical positio higher tha mid-poi t of compressor.

See figure 1.

FIGURE 1

TYPICAL INSTALLATION

S11 LOW AMBIENT

PRESSURE SWITCH

HIGH

PRESSURE

SWITCH

COMPRESSOR

DISCHARGE

LINE

S24 LOSS

OF CHARGE

SWITCH

VALVE

DEPRESSOR

TEE

SHOCK

LOOP

5- Co ect copper li e to low ambie t pressure

switch a d ope side of depressor tee (provided).

Provide a shock loop i copper tubi g to preve t

breakage from vibratio . Tighte co ectio s.

Depressor tee port with valve core is used as

service port. If ecessary, valve core ca be moved

to other leg of tee.

Page 2

B-Low Ambient Pressure Switch Setting (S11)

O e of two types of pressure switches are provided. The

Ra co switch has o e square a d o e rou d adjustme t

k ob a d the Alco switch has two square adjustme t

k obs.

R nco Model

The low ambie t pressure switch provided i the kit is

factory set for 285 psig (1965 kPa) cut-i a d 140 psig

(965 kPa) cut-out.

If ecessary, adjust low ambie t pressure switch as

follows:

1-Rotate rou d k ob to set cut-i pressure. Refer to right

set of i dicati g umbers o face of co trol. See

figure 3.

2- Rotate square k ob to set differe tial i dicator to 145

psig (999 kPa). Refer to left set of i dicati g umbers.

Alco Model

If ecessary, adjust low ambie t pressure switch as

follows:

1-Rotate the square k ob located o the left to set cut-i

pressure. Refer to left set of i dicati g umbers o

face of co trol. See figure 2.

2- Rotate the square k ob located o the right to set

differe tial i dicator to 145 psig (999 kPa). Refer to

right set of i dicati g umbers.

3- Use o ly termi als 1 a d 4 whe co ecti g wiri g.

NOTE - Disregard Cut out minus Diff. is Cut In"

statement on face of control. This does not appl in this

application.

C-Low Ambient Rel y (K58)

1- I stall low ambie t relay i co trol box.

LOW AMBIENT PRESSURE SWITCH S11 DETAIL

SQUARE DIFFERENTIAL

ADJUSTMENT KNOB

FIGURE 2

ROUND CUT-IN

ADJUSTMENT

KNOB

PRESSURE SWITCH IS FACTORY-SET AT 285 PSIG CUT-IN

AND 145 PSIG DIFFERENTIAL (140 PSIG CUT-OUT)

CUT-IN PRESSURE

READOUT ON

RIGHT

DIFFERENTIAL

PRESSURE READĆ

OUT ON LEFT

SQUARE DIFFERENTIAL

ADJUSTMENT KNOB

ROUND CUT-IN

ADJUSTMENT

KNOB

CUT-IN PRESSURE

READOUT ON LEFT DIFFERENTIAL

PRESSURE READĆ

OUT ON RIGHT

RANCO MODEL

ALCO MODEL

Page 3

WIRING

Low ambie t pressure switch S11 is wired i series with

outdoor fa relay or compressor co tactor (si gle-stage

or speed u its).

Low ambie t kits are show with optio al arrows o u it

wiri g diagrams. If u it wiri g diagram is ot available or

does ot show the low ambie t kit, refer to appropriate

wiri g diagram i figures 3 through 13 for wiri g

co ectio s.

DEFROST

RELAY

5 64

2 31

S11

LOW AMBIENT

PRESSURE

SWITCH

REVERSING

VALVE

K58 LOW

AMBIENT

RELAY

FIGURE 3

TO 24V COM

OUTDOOR

FAN MOTOR

S11 LOW AMBIENT CONTROL SWITCHES

OUTDOOR FAN DIRECTLY (LINE VOLTAGE)

SEE SCHEMATIC FIGURE 4

TO C12

TERMINAL F

REMOVE THIS

WIRE

REMOVE THIS WIRE

FIELD WIRING

FACTORY WIRING

TO C12 TERM C

TO K1-1

TO R" LOW

VOLT

TERM STRIP

TO O" LOW

VOLT TERM

STRIP

TO K1-1

K31 PIN 5

COMP C"

Page 4

FIGURE 4

TYPICAL SINGLE-COMPRESSOR HEAT PUMP UNIT WIRING DIAGRAM

(S11 LOW AMBIENT CONTROL SWITCHES OUTDOOR FAN DIRECTLY)

SEE PICTORIAL FIGURE 3

Page 5

DEFROST

RELAY

S11

LOW AMBIENT

PRESSURE SWITCH K58 LOW

AMBIENT

RELAY

FIGURE 5

TO 24V COM

8 97

5 64

2 31

REVERSING

VALVE

K10

CONDENSER FAN

CONTACTOR

TO 24V COM

K45

REVERSING

VALVE RELAY

HP17-953, 1353 TWO-SPEED

S11 LOW AMBIENT PRESSURE CONTROL SWITCHES OUTDOOR

FAN(S) THROUGH A RELAY OR CONTACTOR (PILOT CIRCUIT)

SEE SCHEMATIC FIGURE 6

FIELD WIRING

FACTORY WIRING

24 V POWER

TO K70-1 PIN 4

A4 (R1)

REMOVE THIS WIRE

Page 6

FIGURE 6

TYPICAL SINGLE-COMPRESSOR HEAT PUMP UNIT WIRING DIAGRAM

(S11 LOW AMBIENT CONTROL SWITCHES OUTDOOR FAN THROUGH A RELAY OR CONTACTOR (PILOT CIRCUIT)

SEE PICTORIAL FIGURE 5

Page 7

FIGURE 7

TYPICAL SINGLE-COMPRESSOR PACKAGED HEAT PUMP UNIT WIRING DIAGRAM

(S11 LOW AMBIENT CONTROL SWITCHES OUTDOOR FAN DIRECTLY)

SEE SCHEMATIC FIGURE 9

CHP16-2 TO 5 TON UNITS

K58 LOW

AMBIENT RELAY

COMPRESSOR 1

K10

CONDENSER

FAN RELAY

COMPRESSOR

1 CONTACTOR

L1 L2 L3

T1 T2 T3

OUTDOOR

FAN MOTOR 1

P35

J35

12 13

REVERSING

VALVE

S11

LOW

AMBIENT

PRESSURE

SWITCH

COMP 1

FIELD WIRING

FACTORY WIRING

CAPACITOR

REMOVE THIS WIRE

FIGURE 8

TYPICAL SINGLE-COMPRESSOR LOW AMBIENT WIRING FOR UNITS CONTAINING

68J29 AND 68J84 DEFROST BOARDS (CMC1)

K58 LOW

AMBIENT RELAY

COMPRESSOR

CONTACTOR

L1 L2 L3

T1 T2 T3

REVERSING

VALVE

S11

LOW

AMBIENT

PRESĆ

SURE

SWITCH

FIELD WIRING

FACTORY WIRING

CMC1

DEFROST CONTROL

O OUT

FAN

REMOVE THIS WIRE

OUTDOOR

FAN

Page 8

TYPICAL SINGLE-COMPRESSOR PACKAGED HEAT PUMP UNIT WIRING DIAGRAM

(S11 LOW AMBIENT CONTROL SWITCHES OUTDOOR FAN DIRECTLY)

CHP16-2 TO 5 TON UNITS

FIGURE 9

SEE PICTORIAL FIGURE 7

Page 9

FIGURE 10

SEE SCHEMATIC FIGURE 11

TO:

K1-1 TERMINAL T1

K31 TERMINAL 5

K69 TERMINAL L1

COMPRESSOR TERMINAL BOX TERMINAL 1

DEFROST

RELAY

S11

LOW

AMBIENT

PRESSURE

SWITCH

REVERSING

VALVE

K58 LOW

AMBIENT

RELAY

TO 24V COM

OUTDOOR

FAN MOTOR

TO C12

TERMINAL F

REMOVE THIS

WIRE

FIELD WIRING

FACTORY WIRING

TO K31 TERMINAL 4

3 1

SINGLE PHASE

S11 LOW AMBIENT CONTROL SWITCHES

OUTDOOR FAN DIRECTLY (LINE VOLTAGE)

Page 10

FIGURE 11

SEE PICTORAL FIGURE 10

TYPICAL SINGLE-COMPRESSOR, TWO-STAGE, SINGLE PHASE HEAT PUMP UNIT WIRING DIAGRAM

(S11 Low Ambient Control Switches Outdoor F n Directly)

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