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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,1,_1998 Lennox Industries Inc.

Dallas, Texas

KITS COMMON TO HEATING

AND COOLING EQUIPMENT

502,818M

11/98 LOW AMBIENT CONTROL KIT

Supersedes 3/96

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

USED WITH SINGLE-COMPRESSOR HEAT PUMP UNITS

Package 1 of 1 contains:

1- Low ambient pressure switch assembly (Sll)

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

with flare nuts

1- Relay

1- 20-Foot length of wire

4- 20" Lengths of wire

1- Bag assembly each containing:

8-Wire nuts

2-Saddle valves

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

1-Schrader depressor tee with seal cap

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

losing capacity. This kit is designed for use in ambient

temperatures no lower than 30°F.

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.

A-Pressure Switch Assembly

1- Disconnect power to unit.

2- Remove compressor compartment 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.

TYPICAL INSTALLATION

Sll LOW AMBIENT

PRESSURE SWITCH

COMPRESSOR

SHOCK HIGH

LOOP PRESSURE

SWITCH

DISCHARGE

LINE

S24 LOSS

OF CHARGE

SWITCH

VALVE

DEPRESSOR

TEE

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,

Page 1

B-Low Ambient Pressure Switch Setting (S11)

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

The low ambient pressure switch provided in the kit is

factory set for 285 psig (1965 kPa) cut-in and 140 psig

(965 kPa) cut-out,

If necessary, adjust low ambient pressure switch as

follows:

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, adjust low ambient pressure switch as

follows:

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 Relay (K58)

1- Install low ambient relay in control box,

LOW AMBIENT PRESSURE SWITCH Sll DETAIL

RANCO MODEL

SQUARE DIFFERENTIAL

ADJUSTMENT KNOB

ROUND CUT-IN

ADJUSTMENT

KNOB

DIFFERENTIAL

PRESSURE READ-

OUT ON LEFT

CUT-IN PRESSURE

READOUT ON

RIGHT

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

AND 145 PSlG DIFFERENTIAL (140 PSlG CUT-OUT)

ALCO MODEL

ROUND CUT-IN

ADJUSTMENT

KNOB

SQUARE DIFFERENTIAL

ADJUSTMENT KNOB

CUT-IN PRESSURE

READOUT ON LEFT DIFFERENTIAL

PRESSURE READ-

OUT ON RIGHT

FIGURE 2

Page 2

Lowambientpressureswitch$11iswiredinserieswith

outdoorfanrelayorcompressorcontactor(single-stage

orspeedunits),

Lowambientkitsareshownwithoptionalarrowsonunit

wiringdiagrams,Ifunitwiringdiagramisnotavailableor

doesnotshowthelowambientkit,referto appropriate

wiring diagramin figures 3 through13 for wiring

connections,

TO "R" LOW

VO LT

TERM STRIP

DEFROST

RELAY

TO "0" LOW

VOLT TERM

STRIP

Sll LOW AMBIENT CONTROL SWITCHES

OUTDOOR FAN DIRECTLY (LINE VOLTAGE)

i_= _r"= i

TO K1-1

K31 PIN 5

COMP "C"

REVERSING

VALVE

REMOVE THIS WIRE

$11

LOW AMBIENT

PRESSURE

SWITCH

K58 LOW

AMBIENT

IRELAY

11 31

? '

• I

TO 24V COM

FAN MOTOR ]

TO C12

TERMINAL F

REMOVE THIS

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

TO C12 TERM C

TO K1-1

FIELD WIRING

FACTORY WIRING

SEE SCHEMATIC FIGURE 4

FIGURE 3

Page 3

TYPICAL SINGLE-COMPRESSOR HEAT PUMP UNIT WIRING DIAGRAM

($11 LOW AMBIENT CONTROL SWITCHES OUTDOOR FAN DIRECTLY)

R(LI LI

MP(N L2

HB (FOR G21V)

DS (FOR G21V,B,CB,CBH21)

ECON __ __ __

DESCRIPTION

KEY COMPONENT

A4 CONTROL-TIMED OFF

BI COMPRESSOR

B4 MOTOR-OUTDOOR FAN

Cl CAPACITOR-OUTDOOR FAN

C5 CAPACITOR=COMPRESSOR

C7 CAPACITOR-COMPRESSOR START

C]2 CAPACITOR=DUAL

CMC] CONTROL-DEFROST

HRI HEATER-COMPRESSOR

KI,-I CONTACTOR-COMPRESSOR

KA,-I,_,3 RELAY-DEFROST

K26,-I RELAY-EMERGENCY HEAT

KSE RELAY-HARD START

K58,-I RELAY-LOW AMB. KIT

LJ VALVE-REVERSING

RTS SENSOR-AMBIENT COMPENSATION

54 LIMIT=HIGH PRESSURE SWITCH

$5 LIMIT-HIGH TEMPERATURE

$6 SWITCH,DEFROST

GEl SWITCH=PRESSURE,LOW AMB. KIT

$23 THERMOSTAT-LO AMB. CUT IN

524 SWITCH=LOSS OF CHARGE

$54 THERMOSTAT-SERVICE LIGHT

TBI& TERMINAL STRIP-LOW VOLTAGE

_55€ & RT3 USED WITH

GE OR HONEYWELL THERMOSTAT

G(SL)

GROUND

24V POWER

[_ TBI4

K4-3 _FACTORY WIRE,REMOVE WHEN

TIMED OFF CONTROL (A4) IS USED.

$54 HOOKUP WITH WHITE-RODGERS OR

Z_HEATCRAFT ELECTRONIC THERMOSTAT

)

ECON

Tw2

YI u

$54

LE TERt

DESIGNATION VOLTAGE

P 208=250/60/E

T 220-240/50/E

DENOTES OPTIONAL COMPONENTS

LINE VOLTAGE FIELD INSTALLED

CLASS II VOLTAGE FIELD WIRING

Z_FOR USE WITH COPPER

CONDUCTORS ONLY,

REFER TO UNIT RATING

PLATE FOR MINIMUM

CIRCUIT AMPACITY

AND MAXIMUM FUSE 51ZE

z:_USED ONLY IF COMPRESSOR

FHERMOSTAT 15 NOT INTERNAL

Z_ "T" VOLTAGE UNITS ONLY

COMMON

I.ENNDX, o,o._,..,oo. WIRING DIAGRAM_//_

HEAT PUMP-OUTDOORUNITS

HEAT PUMP SECTION-B

SEE PICTORIAL FIGURE 3

FIGURE 4

Page 4

$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

24 V POWER K45

REVERSING

VALVE RELAY

$11

LOW AMBIENT

PRESSURE SWITCH

TO K70-1 PIN 4

DEFROST

RELAY

1 2 31

==_r= == I

I"" '_-_-] -I

TO 24V COM

VELR1SING

I Iw_w K'° l

CONDENSER FAN

CONTACTOR

SEE SCHEMATIC FIGURE 6

REMOVE THIS WIRE

K58 LOW

AMBIENT

RELAY

---1--_'7 I

TO 2!V COM

FIGURE 5

Page 5

TYPICAL SINGLE-COMPRESSOR HEAT PUMP UNIT WIRING DIAGRAM

($11 LOW AMBIENT CONTROL SWITCHES OUTDOOR FAN THROUGH A RELAY OR CONTACTOR (PILOT CIRCUIT)

TBI4

)K45 I

2 POLE CONTACTOR USED

L_ON -y* VOLTAGE ONLY

ECON

[]

)t_ _ DESCRIPTION

K8 I Z_X KEY COMPONENT

_MED OFF

................

SPII 61 IOMPRESSOR

B4 _OTOR CONTROL FAN

B5 IO_OR CONTROL FAN

Cl ;APABITOR GONOENSER FAN

CZ ;APAC[_OR CONDENSER FAN

_ _ FI USE TRANSFORMER TI

_ HRI 1EATER COMPRESSOR

KI, I,Z _DN3ACTOR COMPRESSOR

Sp KZ. 1.2 :ONTAETOR COMPRESSOR

K4 I,Z,3 _ELAY DEFROST

KZ_ R7 KIO, I ONTACTOR CONDENSER FAN

) K24 1 IELAY CONTROL.SOLENOIO VALVE

] K¢5, 1,2 _ELAY REVERSING VALVE

KBG, 1,2 _ELAY STA_E I,COOL

2*V K57, I 4_LA'f 51AGE 2,L:OOL

[]

K70, I _ELAY STAGE I,CONTROL

FIELD PROVIDED OPTION USEO K71 IT5 _ELA_ STAGE Z CONTROL

z_ FOR _ STAGE CODLING ONLY. K79, !,P _ELAY LVAV,SPII IOPTIONALI

24VAC,SVA MAX, NEC/CEC CLASS 2 LI /ALVE REVERSING

[Jo /ALVE SDLENOIO,2 STAGE STAGE

SOLENOID VALVE IS FIELD R7 1FSI£T[OR CIJRRFNT £FN£1NC_ [OPT/

PROVIDED OPTION USED FOR R?[_ IESISTOR CURRENT SENSING [OPT)

z STAGE COOLING ONLY. R4 5_ITCH LIMIT. HI PRESSURE

_ _ITCH DEFROST. COMPRE550R

SII 3_[TCH LOW AMB KIT

LINE VOLTAGE FACTORY INSTALLED 524 _iV[_CH LOSS OF CHARGE

LINE VOLTAGE FIELD INSTALLED _4g IV/ITCH DEFROST TERMINATION

19 CONTROL

_[514 ]LOCK TERMINAL ILO_ VOLTAGE)

SECTION B

SEE PICTORIAL FIGURE 5

FIGURE 6

Page 6

TYPICAL SINGLE-COMPRESSOR PACKAGED HEAT PUMP UNIT WIRING DIAGRAM

($11 LOW AMBIENT CONTROL SWITCHES OUTDOOR FAN DIRECTLY)

CHP16-2 TO 5 TON UNITS

IZ =31

KlO-I-_Z=-t-

CONDENSER[ -- v-- I

FAN RELAY

_OO

---4

P35

J35 I 1

II , , K58LOW

II /1 3 I AMBIENT RELAY

--1_4, _'ICOMPRESSOR1

REMOVE THIS WIRE

/N1

c°_RTpS°_

LOW

AMBIENT

PRESSURE

SWITCH

COMP1

_CA OUTDOOR

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)

K58 LOW

AMBIENT RELAY

,--_ _ _1----I

\\ .... !

CMC1

DEFROST CONTROL

__ LOW

L_ AMBIENT

PRES-

SURE

SWITCH

REMOVE THIS WIRE

COMPRESSOR

CONTACTOR

j. 22

FIELD WIRING

FACTORY WIRING

FIGURE 8

Page 7

TYPICAL SINGLE-COMPRESSOR PACKAGED HEAT PUMP UNIT WIRING DIAGRAM

/-6 b

"x,

-I

($11 LOW AMBIENT CONTROL SWITCHES OUTDOOR FAN DIRECTLY)

KA-I

CHP16-2 TO 5 TON UNITS

TBE

2AV POWER [_)

NOTE-IF ANY WIRE IN THIS APPLIANCE IS REPLACED, IT

MUST BE REPLACED WITH WIRE OF LIKE SIZE, RATING

AND INSULATION THICKNESS.

DISCONNECT ALL POWER BEFORE SERViCiNG

WARNING-ELECTRIC SHOCK HAZARD,CAN CAUSE INJURY

OR DEATH. UNIT MUST BE GROUNDED IN

ACCORDANCE WITH NATIONAL AND LOCAL CODES

sT,

S74

P35 ,

L,I?

L(RI <- " FIELD WIRING

,'_ t . I POWEBSUPPLY

C4 J _ C7

C_ Z_NOTE-FOR USE WITH COPPER CONDUCTORS

ONLY. REFER TO UNIT RATING PLATE FOR

ILD J35 MINIMUM CIRCUIT AMPACITY AND MAXIMUM

I_T_III OVERCURRENT PROTECTION SIZE

z_CONNECTIONS FOR REMOTE MOUNTED SMOKE

-8 DETECTOR AIT, MAX LOAD O. IVA 2AVAC

Is[ CLASS 1I

!¢V ()Z_OEFROST THERMOSTAT OPEN (16oC) 60°F

CLOSE (2_C) 35_F

_1 (_Z_ IMPORTANT= TO PREVENT MOTOR BURNOUT,

NEVER CONNECT MORE THAN ONE MOTOR

LEAD TO ANY ONE CONNECTION. TAPE

IST UNUSED MOTOR LEADS

:DI K_I.)_J3S-3

BLOWER []

HEAT I []

REV VALVE []

COOL [ []

24V COMMON []

DENOTES OPTIONAL COMPONENTS

DESCRIPTION

KEY COMPONENT

AI7 (S_E NOT_ _)

61 COMPRESSOR

83 _OTOR_BLOWER

B4 _OTOR-OUTDOOR FAN

CI ]APACITOR-OUTDOOR FAN

C4 :APACITOR-BLOWER MOTOR

C5 :APACITOR-COMPRESSOR

C7 ;APACITOR-COMPRESSORIHARD START

CMCI TIMER-DEFROST_COMPRESSOR

F1 =USE-TRANSFORMER Tl

J35 JACK-TEST

J43 JACK-BLOWER MOTOR

KI,-I ]ONTACTOR_COMPRESSOR

K3,-I,2 3ONTACTOR-BLOWER

K4,-1_2_3 RELAY-DEFROST

KIO,-I,2 RELAY-OUTDOOR FAN

K31 RELAY-HARD START KIT

KS8,-I R_AY-LOW AMbieNT KIT

LI CALVE-REVERSING

P2 aLUG-ELECTRIC HEAT

P35 _LUG-TEST

P43 _LUG_BLOWER MOTOR

54 SWITCH-LIMIT_HI PRESS(MANUAL RESET

$6 THERMOSTAT-DEFROST

SIi SWITCH-LOW PRESS,LOW AMB KIT

546 SWITCH-PRESSURE_ DEFROST

574 SWITCH-FIRESTAT I

575 SWITCH-FIRESTAT 2

T[ [RANSFORMER=CONTRO_

TBI TERMINAL STRIP-LOW VOLTAGE

LINE VOLTAGE FIELD INSTALLED

/ENNI_.__¢_ ......z_. WIRING DIAGRAMI6/gB I

HEAT PUMPS-PACKAGED

__220-240/50/I __

HEAT PUMP SECTION B25

SEE PICTORIAL FIGURE 7

FIGURE 9

Page 8

$11 LOW AMBIENT CONTROL SWITCHES

OUTDOOR FAN DIRECTLY (LINE VOLTAGE)

SINGLE PHASE

DEFROST

RELAY

\REMOVE THIS

WIRE

TO:

K1-1 TERMINAL T1

K31 TERMINAL 5

K69 TERMINAL L1

COMPRESSOR TERMINAL BOX TERMINAL 1

I I

REVERSING

VALVE

Sll

LOW

AMBIENT

PRESSURE

SWITCH

---_ 12_,_°_g

N a IRE_AY

€

TO 24V COM

OUTDOOR

FAN MOTOR

TO C12

TERMINAL F

TO K31 TERMINAL 4

FIELD WIRING

FACTORY WIRING

SEE SCHEMATIC FIGURE 11

FIGURE 10

Page 9

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

($11 Low Ambient Control Switches Outdoor Fan Directly)

ECON

KI=

T-

_2_ LO-SPEEDSTART

_WINDING

TERM BOX

AI4[_

24V POWER

4'r

TBI5 _]

ECON

BLOWER

NOTE-

ELECTRIC SHOCK HAZARD,CAN CAUSE INJURY

OR DEATH. UNIT MUST BE GROUNDED IN

ACCORDANCE WITH NATIONAL AND LOCAL CODES.

_DENOTES OPTIONAL COMPONENTS

z_sS54 HOOKUP WITH WHITE-ROOGERS OR

HEATCRAFT ELECTRONIC THERMOSTAT

Z_SSA & RT3 HOOKUP WITH

GE OR HONEYWELL THERMOSTAT

z_FUELMASTER HOOKUP (WF)

DESCRIPTION

KEY COMPONENT

M4 CONTROL-TWO SPEED

3_COMPRESSOR

_AMOTOR-OUTDOOR FAN

_7 CAPACITOR-COMP,HARO START

_l_ CAPACITOR-DUAL

CMCICONTROL-OEFROST,COMPRESSOR I

HRE HEATER-COMPRESSOR 1

J44 JACK-TWO SPEED CONTROL

<I =1 2 CONTACTOR-COMPRESSOR I

<4 _1 2 _ RELAY_DEFROST I

<3_RELAY-HARD START

<58,-I RELAY-LOW AMBIENT

<_9,-!,_ CONTACTOR-COMPRESSOR,TWO SPEE[

_1 VALVE-REVERSING

_44 PLUG-TWO SPEED CONTROL

R2i RESISTOR_BLEED

RT3 SENSOR=AMBIENT COMPENSATION

34 SWITCH-LIMIT,HI PRESS,COMP I

Sil SWITCH-LOW PRESS, ILOW AMB./

_40 THgRMOSTAT-CRANKCASE

554 THERMOSTAT- SERVICE LIGHT

TI9 TRANSFORMgR-COOg!NG CONTROL

TBI5 TERMINAL STRIP-LOW VOLTAGE

_]AUX HEAT I

I AUX HEAT 2

L wP

Eiii]COOL/HEAT 2

REV VALVE

E_]COOL/HEAT I

554

?_ 24v COMMON

A FOR USE WITH COPPER

CONDUCTDRS ONLY,

REFER TO UNIT RATING

PLATE PDR MINIMUM

CIRCUIT AMPACITY

AND MAXIMUM FUSE SIZE

A COMPRESSOR MOTOR

THERMALLY PROTECTED

LINE VOLTAGE FIELD INSTALLED

CLASS II VOLTAGE FIELD WIRIING

L.mNNnX±_t.,_,o.,._. WIRINGDIAGRAMIBx93I

H_ PUMP-OUTDOOR UNITS 4

HPZI-411,511,651=4-P /

208-230/60/ I /

-- -- 4

HEAT PUMP SECTION-ZB46 |

SEE PICTORAL FIGURE 10

FIGURE 11

Page 10

$11 LOW AMBIENT CONTROL SWITCHES

OUTDOOR FAN DIRECTLY (LINE VOLTAGE)

THREE PHASE

DEFROST

RELAY

I I

REVERSING

VALVE

$11

LOW

AMBIENT

.... PRESSURE

SWITCH

LIi &l

TO 24V COM

K58 LOW

AMBIENT

RELAY

TO K10-1

TERMINAL 3

REMOVE THIS

WIRE "_

FAN MOTOR

FIELD WIRING

FACTORY WIRING

SEE SCHEMATIC FIGURE 13

FIGURE 12

Page 11

TYPICALSINGLE-COMPRESSOR, TWO-STAGE, THREE PHASE HEAT PUMP UNIT WIRING DIAGRAM

($11 Low Ambient Control Switches Outdoor Fan Directly)

HB (FOR G21V)

--{_RGEIVB.CB,

DS CBH21V)

ECON

24V POWER

ECON

z_ FUELMASTER HOOKUP(WFI BLOWER

NOTE-

ELECTRIC SHOCK HAZARD,CAN CAUSE INJURY

OR DEATH.UNIT MUST BE GROUNDED IN

ACCORDANCE WITH NATIONAL AND LOCAL CODES.

-..e------DENOTES OPTIONAL COMPONENTS

FOR USE WITH COOPER CONDUCTORS ONLY.

REFER TO UNIT RATING PLATE FOR MINIMUM

CIRCUIT AMPACITY AND MAXIMUM FUSE SIZE.

z_ COMPRESSOR MOTOR THERMALLY PROTECTED

$54 HOOKUP WITH WHITE-ROOGERS OR

Z_HEATCRAFT ELECTRONIC THERMOSTAT

<IOz_40_RH_T5 HOOKUP WITH

NEVWELL THERMOSTAT

DESCRIPTION

KEY 20MPONENT A

AI4 CONTROL-TWO SPEED /2_

BI COMPRESSOR

B4 MOTOR-OUTDOOR FAN I

CE CAPACITOR-OUTDOOR FAN E

CMCI CONTROL-DEFROST,COMPRESSOR I

HRI HEATER-COMPRESSOR I

J44 JACK=TWO SPEED CONTROL

KI,-I,2 CONTACTOR-COMPRESSOR I

K4,-I_Z,5 RELAY-DEFROST I

]

_AUX HEAT I

AUX HEAT 2

_COOL/HEAT 2

REV VALVE

COOL/HEAT I

RTS

24V COMMON

LINE VOLTAGE FIELD INSTALLED

CLASS II VOLTAGE FIELD WIRING

_AI4

KEO,-I

KSG,-I

K69.=1,2

P44

RT5

SII

$40

SSA

TI9

TBi5

CONTACTOR-OUTOOOR FAN

RELAY-LOW AMBIENT

CONTACTOR=COMPRESSOR_TWO SPEED

VALVE-REVERSING

PLUG=TWO SPEED CONTROL

SENSOR AMBIENT COMPENSATION

SWITCH-LIMIT,HI PRESS,COMP I

SWITCH-LOW PRESS.(LOW AMB,)

THERMOSTAT-CRANKCASE

THERMOSTAT-SERVICE LIGHT

TRANSFORMER-COOLING CONTROL

TERMINAL STRIP=LOW VOLTAGE

LENNnX,_ ....... ,_. WIRINGDIAGRAM]GZg_I

HEAT PUMP-OUTDOOR UNITS

HP21-415,513,653-2,5,4-Y 1

208=230/60/5

SEE PICTORAL FIGURE 12

FIGURE 13

Page 12

LENNOX Controls And HVAC Accessories Manual L0806303

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