LENNOX Controls And HVAC Accessories Manual L0806303

User Manual: LENNOX LENNOX Controls and HVAC Accessories Manual LENNOX Controls and HVAC Accessories Owner's Manual, LENNOX Controls and HVAC Accessories installation guides

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KITS COMMON TO HEATING
AND COOLING EQUIPMENT
,1,_
1998 Lennox Industries Inc.
Dallas, Texas

502,818M

11/98

LOW AMBIENT

CONTROL

KIT

Supersedes 3/96

INSTALLATION

INSTRUCTIONS
FOR LOW AMBIENT
USED WITH SINGLE-COMPRESSOR

Package 1 of 1 contains:

CONTROL KIT LB-57113BM
HEAT PUMP UNITS

(27J00)

A-Pressure Switch Assembly

1- Low ambient pressure switch assembly (Sll)

1- Disconnect power to unit.

1- 36" (914 mm) length of 1/4" (6,35 mm) copper tube
with flare nuts

2- Remove compressor compartment

1- Relay
1- 20-Foot length of wire

access panel,

3- Install valve depressor tee discharge line gauge port.
4- Install pressure switch in compressor compartment
with screws provided. Switch should be installed in a
vertical position higher than mid-point of compressor.
See figure 1.

4- 20" Lengths of wire
1- Bag assembly each containing:
8-Wire nuts

TYPICAL INSTALLATION

2-Saddle valves

Sll LOW AMBIENT
PRESSURE SWITCH

4-#10-16 X 5/8" S,D,S,T. screws
1-Schrader depressor tee with seal cap

COMPRESSOR

The low ambient pressure switch (Sll)
cycles the
outdoor fan while allowing compressor operation in the
cooling cycle. This intermittent fan operation results in
a high evaporating
temperature which allows the
system to operate without icing the evaporator coil and

SHOCK
LOOP

DISCHARGE
LINE

losing capacity. This kit is designed for use in ambient
temperatures no lower than 30°F.

S24 LOSS
OF CHARGE
SWITCH

Lennox recommends a belly-band style crankcase heater
(P-8-8852, 240v, 45w) be added to compressors which
do not have one. A freezestat (LB-62858CA) should also
be added to any system using a low ambient kit.
NOTE - Do not use this low ambient kit on units with
capillary tube metering devices. Install an expansion
valve metering device if using this kit.

Page 1

HIGH
PRESSURE
SWITCH

VALVE
DEPRESSOR
TEE

5-

FIGURE 1
Connect copper line to low ambient pressure
switch and open side of depressor tee (provided).
Provide a shock loop in copper tubing to prevent
breakage from vibration, Tighten connections,
Depressor tee port with valve core is used as
service port, If necessary, valve core can be moved
to other leg of tee,

B-Low Ambient Pressure Switch Setting (S11)

LOW AMBIENT PRESSURE SWITCH Sll

One of two types of pressure switches are provided, The
Ranco switch has one square and one round adjustment
knob and the AIco switch has two square adjustment
knobs,

RANCO MODEL
ROUND CUT-IN
ADJUSTMENT
KNOB

SQUARE
DIFFERENTIAL
ADJUSTMENT
KNOB

Ranco Model
The low ambient pressure switch provided in the kit is
factory set for 285 psig (1965 kPa) cut-in and 140 psig

DETAIL

\

(965 kPa) cut-out,
If necessary,
follows:

adjust low ambient pressure switch as

1-Rotate round knob to set cut-in pressure, Refer to right
set of indicating numbers on face of control, See
figure 3,
2- Rotate square knob to set differential indicator to 145
psig (999 kPa), Refer to left set of indicating numbers,
Alco Model
If necessary,
follows:

CUT-IN PRESSURE
READOUT ON
RIGHT

DIFFERENTIAL
PRESSURE
READOUT ON LEFT

adjust low ambient pressure switch as
PRESSURE SWITCH IS FACTORY-SET
AND 145 PSlG DIFFERENTIAL

AT 285 PSIG CUT-IN

(140 PSlG CUT-OUT)

1-Rotate the square knob located on the left to set cut-in
pressure, Refer to left set of indicating numbers on
face of control, See figure 2,
2- Rotate the square knob located on the right to set
differential indicator to 145 psig (999 kPa), Refer to
right set of indicating numbers,
3- Use only terminals 1 and 4 when connecting wiring,
NOTE - Disregard "Cut out minus Diff. is Cut In"
statement on face of control. This does not apply in this
appfication.
C-Low Ambient

ALCO MODEL

ROUND CUT-IN
ADJUSTMENT
KNOB

SQUARE DIFFERENTIAL
ADJUSTMENT KNOB

\

Relay (K58)

1- Install low ambient relay in control box,

CUT-IN PRESSURE
READOUT ON LEFT

DIFFERENTIAL
PRESSURE
READOUT ON RIGHT

FIGURE 2

Page 2

Lowambientkitsareshownwithoptionalarrowsonunit
wiringdiagrams,
If unitwiringdiagramis notavailable
or
Lowambientpressureswitch$11iswiredin serieswith
doesnotshowthelowambientkit,referto appropriate
outdoorfanrelayor compressor
contactor(single-stage wiring diagramin figures 3 through 13 for wiring
connections,
orspeedunits),
Sll LOW AMBIENT CONTROL SWITCHES
OUTDOOR FAN DIRECTLY (LINE VOLTAGE)
TO "R" LOW
VO LT
TERM STRIP
K4
DEFROST
RELAY

!
REMOVE

i_= _r"=

THIS

WIRE

D

i

TO "0" LOW
VOLT TERM
STRIP

$11
LOW AMBIENT
PRESSURE
SWITCH

REMOVE

THIS

,_......."d/VIRE

TO K1-1
K31 PIN 5
COMP "C"

K58 LOW
AMBIENT
I

RELAY

11

31
TO C12 TERM C

? '
•

I

TO 24V COM

L1
REVERSING
VALVE

TO K1-1

MOTOR

]

TO C12
TERMINAL

FIELD WIRING
FACTORY WIRING

SEE SCHEMATIC

FAN

FIGURE 4

FIGURE 3

Page 3

F

TYPICAL SINGLE-COMPRESSOR
($11 LOW AMBIENT CONTROL

HEAT PUMP UNIT WIRING DIAGRAM
SWITCHES

OUTDOOR

FAN DIRECTLY)

24V POWER

[_
HB

(FOR

DS

(FOR

G21V)

TBI4
HB

G21V,B,CB,CBH21)

ECON

DS
__

__

ECON

__

E
G
Wl

Wl

Tw2

W2

cc

W
<
L

_o
_o
o
<

KEY
A4
BI
B4
Cl
C5
C7
C]2
CMC]
HRI

Y2
K4-3

$54 HOOKUP
Z_HEATCRAFT

WIRE,REMOVE
WHEN
OFF CONTROL
(A4) IS
WITH
WHITE-RODGERS
ELECTRONIC
THERMOSTAT

YI

RELAY-HARD
START
RELAY-LOW
AMB.
KIT
VALVE-REVERSING
SENSOR-AMBIENT
COMPENSATION

54
$5

LIMIT=HIGH
LIMIT-HIGH

$6
GEl
$23

SWITCH,DEFROST
SWITCH=PRESSURE,LOW
THERMOSTAT-LO
AMB.

524

SWITCH=LOSS

$54
TBI&

THERMOSTAT-SERVICE
TERMINAL
STRIP-LOW

)
$6
$54

i

PRESSURE
SWITCH
TEMPERATURE
AMB. KIT
CUT
IN

OF CHARGE
LIGHT
VOLTAGE

& RT3 USED WITH
GE OR HONEYWELL
THERMOSTAT

COMMON

LE TERt
DESIGNATION
P
T

A

g
u

2

KSE
K58,-I
LJ
RTS

LI
L2

w

USED.

OR

START

CONTACTOR-COMPRESSOR
RELAY-DEFROST
RELAY-EMERGENCY
HEAT

_55€

_FACTORY
TIMED

FAN

KI,-I
KA,-I,_,3
K26,-I

C
R(LI
MP(N

DESCRIPTION
COMPONENT
CONTROL-TIMED
OFF
COMPRESSOR
MOTOR-OUTDOOR
FAN
CAPACITOR-OUTDOOR
CAPACITOR=COMPRESSOR
CAPACITOR-COMPRESSOR
CAPACITOR=DUAL
CONTROL-DEFROST
HEATER-COMPRESSOR

VOLTAGE
208=250/60/E
220-240/50/E

G(SL)

DENOTES
LINE

VOLTAGE

CLASS

COMPONENTS

OPTIONAL

II

FIELD

VOLTAGE

INSTALLED
FIELD

WIRING

Z_FOR
USE WITH
COPPER
CONDUCTORS
ONLY,
REFER
TO UNIT RATING
PLATE
FOR MINIMUM
CIRCUIT
AMPACITY
AND MAXIMUM
FUSE
51ZE

GROUND

z:_USED
ONLY
FHERMOSTAT
Z_

"T"

VOLTAGE

IF COMPRESSOR
15 NOT INTERNAL
UNITS

ONLY

E

I.ENNDX, o,o._,..,oo. WIRING DIAGRAM_//_
HEAT PUMP-OUTDOOR UNITS
C7
HEAT

SEE PICTORIAL FIGURE 3

FIGURE 4
Page 4

PUMP

SECTION-B

$11 LOW AMBIENT PRESSURE CONTROL SWITCHES OUTDOOR
FAN(S) THROUGH A RELAY OR CONTACTOR (PILOT CIRCUIT)
HP17-953,

1353 TWO-SPEED

FIELD WIRING
FACTORY WIRING

TO K70-1 PIN 4

24 V POWER

K4
DEFROST
RELAY

K45
REVERSING
VALVE RELAY

REMOVE

THIS

WIRE

==_r= == I
1

$11
LOW AMBIENT
PRESSURE SWITCH

2

31

I"" '_-_-] -

K58 LOW

I
l

AMBIENT
RELAY

__

I
I

4

---1--_'7 I
TO 24V COM

VELR1SING

I

K'° l

CONDENSER FAN
CONTACTOR

Iw_w
SEE SCHEMATIC

FIGURE 6

FIGURE 5

Page 5

TO 2!V COM

TYPICAL SINGLE-COMPRESSOR
($11 LOW AMBIENT

CONTROL SWITCHES

HEAT PUMP UNIT WIRING DIAGRAM

OUTDOOR

FAN THROUGH A RELAY OR CONTACTOR

(PILOT CIRCUIT)

ECON
TBI4

[]
[]

)K45

)t_

I

_
K8

I

Z_X

SPII

_

_

_

DESCRIPTION
KEY
_MED

COMPONENT

OFF

................
61

IOMPRESSOR

B4
B5

_OTOR
IO_OR

Cl

;APABITOR

GONOENSER

CZ

;APAC[_OR

CONDENSER

FI

USE

HRI

CONTROL
CONTROL

FAN
FAN

TRANSFORMER

1EATER

FAN

FAN

TI

COMPRESSOR

KI,

I,Z

_DN3ACTOR

KZ.
K4

1.2
I,Z,3

:ONTAETOR
COMPRESSOR
_ELAY DEFROST

)

KIO,
K24

I
1

ONTACTOR
CONDENSER
IELAY
CONTROL.SOLENOIO

]

K¢5,

1,2

_ELAY

REVERSING

KBG,

1,2

_ELAY

STA_E

I,COOL

K57,

I

4_LA'f

51AGE

2,L:OOL

STAGE
STAGE

I,CONTROL
Z CONTROL

Sp

KZ_

R7

2*V

COMPRESSOR

FAN
VALVE

VALVE

[]

A
FIELD
z_

PROVIDED

SOLENOID
PROVIDED
z STAGE

LINE
LINE

2
L_ON

POLE
-y*

CONTACTOR
VOLTAGE

USED
ONLY

SEE PICTORIAL FIGURE 5

FIGURE 6
Page 6

OPTION

USEO

FOR _ STAGE
CODLING
ONLY.
24VAC,SVA
MAX,
NEC/CEC
CLASS

VALVE
OPTION
COOLING

VOLTAGE
VOLTAGE

2

IS FIELD
USED
FOR
ONLY.

FACTORY
INSTALLED
FIELD
INSTALLED

K70,
K71

I
IT5

_ELAY
_ELA_

K79,
LI
[Jo

!,P

_ELAY
/ALVE
/ALVE

LVAV,SPII
REVERSING
SDLENOIO,2

R7
R?[_
R4

1FSI£T[OR
CIJRRFNT
IESISTOR
CURRENT
5_ITCH
LIMIT.
HI

_
SII

_ITCH
3_[TCH

524
_4g
19

_iV[_CH
IV/ITCH

_[514

]LOCK

SECTION

IOPTIONALI
STAGE
£FN£1NC_
SENSING
PRESSURE

STAGE
[OPT/
[OPT)

DEFROST.
LOW AMB

COMPRE550R
KIT

LOSS OF
DEFROST

CHARGE
TERMINATION
CONTROL

TERMINAL

B

ILO_

VOLTAGE)

TYPICAL SINGLE-COMPRESSOR
($11 LOW AMBIENT

PACKAGED HEAT PUMP UNIT WIRING DIAGRAM

CONTROL SWITCHES OUTDOOR
CHP16-2 TO 5 TON UNITS

IZ =31

FAN DIRECTLY)

P35

REMOVE

J35 I 1

KlO
-I-_Z=-t
CONDENSER[
FAN RELAY

--

v

--

/

\
II
II ,
II /

I

,
1

3

THIS WIRE

N1

c°_RTpS°
_

K58LOW

I AMBIENT RELAY

--1_4, _'ICOMPRESSOR
1
I

1

---4

LOW
AMBIENT
PRESSURE
SWITCH
COMP1

_O
O
>
04

o
l-

B4
OUTDOOR

i

_CA

FAN MOTOR 1
pACcIlToR
SEE SCHEMATIC

------

FIGURE 9

FIELD WIRING
FACTORY WIRING

FIGURE 7
TYPICAL SINGLE-COMPRESSOR
LOW AMBIENT WIRING FOR UNITS CONTAINING
68J29 AND 68J84 DEFROST BOARDS (CMC1)
CMC1
DEFROST CONTROL

/

3/
_ _1----I

R

"=

\\

....

THIS

WIRE

K1
COMPRESSOR
CONTACTOR

K58 LOW
AMBIENT RELAY

,--_

REMOVE

j. 22

!

__
L_

FIGURE 8
Page 7

LOW

PRESAMBIENT
SURE
SWITCH

FIELD WIRING
FACTORY WIRING

TYPICAL SINGLE-COMPRESSOR
($11 LOW AMBIENT

PACKAGED HEAT PUMP UNIT WIRING DIAGRAM

CONTROL SWITCHES

OUTDOOR

FAN DIRECTLY)

CHP16-2 TO 5 TON UNITS
P2
/ -6
"x,

TBE
b

2AV

)

NOTE-IF
ANY WIRE IN THIS APPLIANCE
MUST BE REPLACED WITH WIRE OF LIKE
AND INSULATION
THICKNESS.
DISCONNECT

ALL

POWER BEFORE

IS REPLACED,
SIZE,
RATING

POWER

[_

IT

SERViCiNG

-I

<

WARNING-ELECTRIC
SHOCK HAZARD,CAN
CAUSE INJURY
OR DEATH. UNIT MUST BE GROUNDED IN
ACCORDANCE WITH NATIONAL AND LOCAL CODES

sT,

BLOWER

[]

HEAT

I

[]

VALVE

[]

COOL [

[]

S74

P35 ,

REV

C_
ILD

Z_NOTE-FOR
USE WITH COPPER CONDUCTORS
ONLY. REFER TO UNIT RATING PLATE FOR
MINIMUM
CIRCUIT
AMPACITY
AND MAXIMUM

J35

TJ
I_T_III

OVERCURRENT PROTECTION SIZE
z_CONNECTIONS
FOR REMOTE MOUNTED SMOKE
-8

!¢V

Is[

_1

AIT,

DETECTOR
()Z_OEFROST

(_Z_

IST

MAX LOAD O. IVA 2AVAC

THERMOSTAT OPEN (16oC)

CLASS
1I
CLOSE (2_C)

NEVER CONNECT MORE THAN ONE MOTOR
IMPORTANT=
PREVENT
MOTOR BURNOUT,
LEAD
TO ANY TO
ONE
CONNECTION.
TAPE
UNUSED MOTOR LEADS

:DI K_I.)_J3S-3

KA-I

24V
DENOTES OPTIONAL

L,I?
L (RI

<-

"

, ' _

t . I

FIELD

WIRING

DESCRIPTION
COMPONENT
(S_E NOT_ _)
COMPRESSOR
_OTOR_BLOWER
_OTOR-OUTDOOR
FAN
]APACITOR-OUTDOOR
FAN
:APACITOR-BLOWER
MOTOR
:APACITOR-COMPRESSOR
;APACITOR-COMPRESSORIHARD
TIMER-DEFROST_COMPRESSOR
=USE-TRANSFORMER
Tl
JACK-TEST
JACK-BLOWER
MOTOR

KI,-I
K3,-I,2
K4,-1_2_3
KIO,-I,2
K31
KS8,-I
LI
P2
P35
P43
54
$6
SIi
546
574
575
T[
TBI

]ONTACTOR_COMPRESSOR
3ONTACTOR-BLOWER
RELAY-DEFROST
RELAY-OUTDOOR
FAN
RELAY-HARD
START KIT
R_AY-LOW
AMbieNT KIT
CALVE-REVERSING
aLUG-ELECTRIC
HEAT
_LUG-TEST
_LUG_BLOWER MOTOR
SWITCH-LIMIT_HI
PRESS(MANUAL
THERMOSTAT-DEFROST
SWITCH-LOW PRESS,LOW AMB KIT
SWITCH-PRESSURE_
DEFROST
SWITCH-FIRESTAT
I
SWITCH-FIRESTAT
2
[RANSFORMER=CONTRO_
TERMINAL STRIP-LOW
VOLTAGE

POWEBSUPPLY

J

_

C7

/ENNI_.__¢_

VOLTAGE FIELD

START

......
z_. WIRING DIAGRAMI6/gB I

__220-240/50/I

__

HEAT PUMP SECTION B25
FIGURE 7

FIGURE 9
Page 8

RESET

INSTALLED

HEAT PUMPS-PACKAGED

SEE PICTORIAL

COMMON []

COMPONENTS

KEY
AI7
61
83
B4
CI
C4
C5
C7
CMCI
F1
J35
J43

LINE

C4

60°F

35_F

$11 LOW AMBIENT CONTROL SWITCHES
OUTDOOR FAN DIRECTLY (LINE VOLTAGE)
SINGLE PHASE

TO:
K1-1 TERMINAL
K31 TERMINAL
K69 TERMINAL
COMPRESSOR

T1
5
L1
TERMINAL BOX TERMINAL

1

K4
DEFROST
RELAY

\
REMOVE
THIS
WIRE

LOW
AMBIENT
PRESSURE
Sll
SWITCH

B4
OUTDOOR
FAN MOTOR
TO K31 TERMINAL 4

I

I

---_

N

12_,_°_g

a I RE_AY

)m

I
I

I1
I
I

€
TO 24V COM

L1
REVERSING
VALVE

FIELD WIRING
FACTORY WIRING

SEE SCHEMATIC FIGURE 11
FIGURE

10

Page 9

TO C12
TERMINAL

F

TYPICAL SINGLE-COMPRESSOR,
TWO-STAGE, SINGLE PHASE HEAT PUMP UNIT WIRING DIAGRAM
($11 Low Ambient Control Switches Outdoor Fan Directly)
4'r
TBI5

24V

POWER

_]
HB
DS
ECON

ECON

BLOWER
_]AUX
I

L

NOTEELECTRIC SHOCK HAZARD,CAN
CAUSE INJURY
OR DEATH. UNIT MUST BE GROUNDED IN
ACCORDANCE WITH NATIONAL
AND LOCAL CODES.

Y2
0

HEAT

AUX

I

HEAT

2

wP
Eiii]COOL/HEAT
REV

_DENOTES

2

VALVE

COMPONENTS

OPTIONAL

E_]COOL/HEAT

I

z_sS54
HOOKUP WITH WHITE-ROOGERS
OR
HEATCRAFT ELECTRONIC
THERMOSTAT
Z_SSA
GE

@
<

& RT3 HOOKUP WITH
OR HONEYWELL
THERMOSTAT

z_FUELMASTER

HOOKUP

_S
554

(WF)

DESCRIPTION
KEY
COMPONENT
M4
CONTROL-TWO SPEED
3_COMPRESSOR
_AMOTOR-OUTDOOR
FAN
_7
CAPACITOR-COMP,HARO
START
_l_
CAPACITOR-DUAL
CMCICONTROL-OEFROST,COMPRESSOR
HRE
HEATER-COMPRESSOR
1
J44
JACK-TWO
SPEED CONTROL
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