LENNOX Controls And HVAC Accessories Manual L0806307

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,_)2006 Lennox Industries inc.

Dallas, Texas, USA

COOLING UNITS

KITS AND ACCESSORIES

Tech nical

bHcations

Litho U.S.A.

505,224M

08/06

Supersedes 05/06

LOW AMBIENT CONTROL

KIT

INSTALLATION INSTRUCTIONS FOR LOW AMBIENT CONTROL KIT LB-101123C (68M04)

USED WITH: HSXA19-038 & XC21 CONDENSING UNITS;

HPXA19-038 & XP19 HEAT PUMP UNITS

Package 1 of 1 contains the following:

1 - Low ambient pressure switch assembly 83L6001

(S11)

2 - Relays - part #69J8001 (K58 and K159)

10 - 20" Lengths of wire (c/w 3/16" Female quick con-

nects on one end of each wire)

10 - Wire nuts

4-ll10-16 X 5/8" S.D.S.T. screws

1 - Schrader depressor tee with seal cap

Ordered separately:

1 - Properly sized freezestat (S49)

AIMPORTANT

The low ambient control pressure switch (Sll) cycles the

outdoor fan, while allowing continuous compressor opera-

tion during a cooling demand. This intermittent outdoor fan

operation maintains a minimum pressure differential

across the expansion device as the ambient temperature

drops, thus reducing capacity losses during low ambient

conditions. The freezestat (ordered separately) senses

suction line temperature and cycles the compressor off

when suction line temperature falls below its setpoint. This

kit is designed for use in ambient temperatures that are no

lower than 30°F (-1°C) unless otherwise noted in the Engi-

neering Handbook. Use this kit only with HSXA19-038,

XC21, HPXA19-038, or XP19 units in R410A refrigerant

applications.

NOTE -This kit may be applied in expansion valve sys-

tems only. It is not suitable for use in systems which use

capillary tube metering devices.

All units are factory-equipped with a crankcase heater.

1 - Turn off the electrical power to the unit.

2- Remove compressor compartment access panel, if

applicable.

3 - Install provided low ambient pressure switch on open

port (no valve core) of provided tee fitting.

NOTE -Pressure switch must be installed before

tee is installed to avoid refrigerant loss.

4-Install tee fitting on condensing unit liquid line service

port.

5 - Install cap on valve core port and tighten to 6 to 8 ft.-

Ibs.

6 - Route pressure switch wires into control box and con-

nect per applicable unit wiring diagram.

7 - A freezestat, sized per table 1 and ordered separately,

must be installed. Install the freezestat near the evapo-

rater coil discharge line (on the last 5/16" or 3/8" bend

of the indoor coil) or on the suction line.

Table 1

Freezestat Selection

Tubing Wire Wire Lennox

Size Length Gauge Part No.

3/8" 90-13/16" 18 93G35

112" 140-13t16" 18 39H29

5/8" 36-1/2" 18 50A93

8 - HSXA19-038 and XC21 Units -Use the two provided

screws to install the provided K159 relay in the control

box.

HPXA19-038 and XP19 Units - Use the four provided

screws to install the provided K58 and K159 relays in

the control box,

K58 or K159 Relay

7 9

A_B

Figure 1

08/06

IIIIIIIIIIIIIIIIIIIIIIIIIIIIHIIIIIIII Page 1 505,224M

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

Complete the wiring connections per the appropriate wir-

ing diagram. See figures 2 through 5.

The provided low ambient pressure switch is factory set for

450 psig (3100 kPa) cut-in and 240 psig (1600 kPa) cut-

out. This switch is not adjustable,

The freezestat (ordered separately) will open at 29°F

(-2°C) and close at 58°F (10°C), See table 1,

NOTE: Use ONLY expansion valve metering devices on

units with low ambient kits.

Cooling Mode

HSXA19-038 and XC21 Units

Set the room thermostat to call for cooling, The unit will re-

ceive a Y signal from the room thermostat through the field

mounted freeze thermostat. The compressor will cycle

ON. The outdoor fan will be OFF until the liquid line pres-

sure reaches the ON setting (450 psig - 3100kPa) of the

low ambient. The low ambient pressure switch (S11) con-

tacts will close, and the K159 relay coil will be energized,

K159-1 relay contacts will close, and the outdoor fan motor

will cycle ON,

NOTE -The outdoor fan motor will be cycled by the low am-

bient and K159 relay. During a call for cooling when the liq-

uid line pressure rises above 450 psig (3100 kPa), the out-

door fan will cycle ON, When the liquid line pressure falls

below 240 psig (1600 kPa), the outdoor fan will cycle OFF.

HPXA19-038 and XP19 Units

Set the room thermostat to call for cooling. The defrost

board in the unit will receive a Y and O signal from the room

thermostat. The O signal will energize the reversing valve

and the K58 relay coil, Contacts K58-1 will open, The Y sig-

nal will go through the freeze stat to Y1 on the defrost

board. The signal will go into defrost board to the HI-PS ter-

minals, out to the high pressure switch and discharge ther-

mostat, then back to the other HI-PS terminal. The signal

will come back out of the defrost board on the Y terminal,

which will energize the compressor contactor coil. The

compressor will cycle ON. The outdoor fan motor will be

OFF until the liquid line pressure reaches the setting of the

low ambient pressure switch (450 psig - 3100kPa). The low

ambient pressure switch will close and K159 relay coil will

be energized. K159-1 contacts will close and the outdoor

fan motor will cycle ON,

NOTE -The outdoor fan motor will be cycled by the low am-

bient and K159 relay, During a call for cooling when the liq-

uid line pressure rises above 450 psig (3100 kPa), the out-

door fan will cycle ON, When the liquid line pressure falls

below 240 psig (1600 kPa), the outdoor fan will cycle OFF.

Heating Mode

HPXA19-038 and XP19 Units

Set the room thermostat to call for heating, The defrost

board in the unit will receive a Y signal from the room ther-

mostat, The O signal from the room thermostat is not ener-

gized, so the K58 relay coil will not be energized. Contacts

K58-1 will remain closed. The Y signal will go through the

freeze stat to Y1 on the defrost board. The signal will go

into defrost board to the HI-PS terminals, out to the high

pressure switch and discharge thermostat and back to the

other Ht-PS terminal. The signal will come back out of the

defrost board on the Y terminal which will energize the

compressor contactor coil, The compressor will cycle ON.

The K58-1 relay contacts (which are normally closed) will

prevent the low ambient pressure switch from interrupting

the outdoor fan motor operation during the heating mode,

Page 2

OUTDOOR FAN

[LEAOLES5 }

HSXA19-038 Wiring Diagram

RED

RED _230

BLUE HI SPEED

YELLOW LOWSPEED

BLACK COMMON24V

A132

DIAGNOSTIC MODULE

C5 GROUND

CAPACITORF_ L_

COMPRESSOR

CONTACTOR

SB7

PRESSURE

_ITCH

_ HIGH

_:_3/PRESSURE

"_ SWITCH RED

MPRESSI

NTACTOI

40 Gl Z_

HRI _

F--

A132

OUIPMENT

;ROUND _;

COMPRESSOR

COMPRESSOR /_

INDOOR

UNIT

TBI __

F---

[EF

YL-_ -- IZ_-

G60

THERMOSTAT

CONTACTOR

( )'.I"[.)-0-._O_ .r-. 511

BLUE /_ _YLW TKI59-- "K-'L R

YELLOW _'=--_ .'_ I _' --

TO-"[ I-.,-(_;k' I I- "'

.T= K_ L. __ _

A,32

D, I

NOTE-

Z_ FOR USE WITH COPPER CONDUCTORS

ONLY.REFER TO UNIT RATING

PLATE FOR MINIMUM CIRCUIT

AMPACITY AND MAXIMUM OVER-

CURRENT PROTECTION SIZE

-'_REFER TO COMPRESSOR IN

UNIT FOR ACTUAL TERMINAL

ARRANGEMENT

WARNING-

ELECTRIC SHOCK HAZARD,CAN CAUSE INJURY

OR DEATH.UNIT MUST BE GROUNDED IN

ACCORDANCE WITH NATIONAL AND LOCAL CODES.

Z_ REMOVE JUMPER FOR TWO STAGE COOL

•_ ON Ag2 CUT ONBOARD W91€ JUMPER FROM OS

TO R, WHEN HUMIDITY CONTROL IS USED

•_NON Ag2 DO NOT CUT ONBOARD wg51 JUMPER

FROM R TO 0. IT IS USED FOR APPLICATIONS

FOR CONDENSING UNITS

Z_ FOR CONDENSING UNIT APPLICATIONS USE

RTO 0 JUMPER, REMOVE IN HEAT PUMP

APPLICATIONS,

A:_ REMOVE OS TO YI JUMPER WHEN

HUMIDITY CONTROL IS USED

WHEN TWO STAGE THERMOSTAT 15 USED, CONNECT

SECOND STAGE HEAT BULB TO TERMINAL "W2"

AND REMOVE JUMPER BETIEEN "R" AND "W2"

____L34 SOLENOID IS LOCATED IN COMPRESSOR,

COIL IS 24 VOC, 00 NOT CONNECT 2_VAC

TO COIL TERMINALS.

A%SII,KI59 AND KSB ARE OPTIONAL LOW

AMBIENT CONTROLS

NOTE= MINIMUM TRANSFORMER REQUIRED IN

INDOOR UNIT-€O VA

Figure 2

G32V,G60V SIGNATURE

INDOOR

UNIT A92

TBI ,_

W951 []

I B_]]-

El-'

_----.-__ _

51M27

THERMOSTAT

A2 _,

CB31MV,CBX32MV SIGNATURE

INDOOR 51M27

UNIT THERMOSTAT

TBI A2

---,_-_

F-

_ -{_-- .-@

RED -4_

YLW 41-

BL 4_ _

BK 41-

IN-.

CB29,CBJO

INDOOR

UNIT TBI

Nt-

N-

RED .,ll-J

s_g

TYPICAL

FREEZESTAT __ __

i -- --

m -- --

THERMOSTAT

AZ _

_INDICATES OPTIONAL COMPONENTS

_LINE VOLTAGE FIELD INSTALLED

-- -- --CLASS II VOLTAGE FIELD INSTALLED

GE VARIABLE FAN MOTOR (Be)

COOLING UNITS-

LENNOX CONDENSING UNITS

LOWAMBIENT KIT FOR

HSXAIg-OGB-230-02

Supersedes Form No,

0506

Ne_ For_ No.

554,45 IW

(_)gO06L_a_x la_u=_,l_= In©. LI fho U, S, A.

Page 3

RED -6

YLW

BL 41-

BLK

BRN •

64-0,850

INDOOR THERMOSTAT

UNIT FAZ _,

TBI

r ..... -@ t

IN- .... -@1

@ .... -@1

---- .... --@1

--- --,-0t

XC21 Wiring Diagram

66O

INDOOR THERMOSTAT

RED ._ --I--(G) I

YLW 41- --I-_ 1

BRN 41 I-_l /v

587

Q OW

PRESSURE

SWITCH

5€

O HIGH

PRESSURE

SWITCH RIO

L' _ON_K_ _ _F__jAI32

_/Z__s4o B_,'_

HRI )

F'f--

Ai_2 L_ __

ZDUIP_ ENT

BROU_{

L2_ _ )

COMPRESSOR

CONTACTOR

COMPRESSOR L_

OUTDOOR FAN

(LEADLESS)

BLUE K IB9_..2 _ YLW ,K!59 _ kR

I c'J l... I BLOEI ""

I_ _B_o

----J J UNIT THERMOSTAT

tN- ..... -@l

I__ ..... -@l

RE_D eFJ

r- ---.... -@ i

s_ _ [E]-..... -@I

TYPICAL

FREEZESTAT _ -- _ ..... _ I

/_k NOTE-FOR USE WITH COPPER CONDUCTORS ONLY, ,_ FOR CONDENSING UNIT APPLICATIONS USE

REFER TO UNIT RATING PLATE FOR MINIMUM R TO 0 JUMPER, REMOVE IN HEAT PUMP

CIRDUIT AMPACITY AND MAXIMUM OVERCURRENT APPLICATIONS.

PROTECTION SIZE "_ REMOVE DS TO YI JUMPER IHEN

•_REFER TO COMPRESSOR IN UNIT FOR

ACTUAL TERMINAL ARRANGEMENT HUMIDITY CONTROL IS USED

_k _IHEN TWO STAGE THERMOSTAT IS USED, CONNECT

/_ WARNING- SECOND STAGE HEAT BULB TO TERMINAL "V/2"

ELECTRIC SHOCK HAZARD,CAN CAUSE INJURY AND REMOVE JUMPER BETWEEN "R" AND "12"

OR DEATH,UNIT MUST BE GROUNDED IN

ACCOROANCE IITH NATIONAL AND LOCAL CODES, /(_k L3€ SOLENOID IS LOCATED IN COMPRESSOR.

./4k REMOVE JUMPER FOR TWO STAGE COOL COIL IS 2€ VDC, DO NOT CONNECT 24VAC

TO COIL TERMINALS.

-_ ON Ag2 CUT ONBOARO W914 JUMPER FROM DS i'k OPTIONAL LOW AMBIENT CONTROLS

TO R, WHEN HUMIDITY CONTROL IS USED

/_, ON A92 DO NOT CUT ONBOARD W951 JUMPER NOTE= MINIMUM TRANSFORMER REQUIRED IN

FROM R TO O. IT IS USED FOR APPLICATIONS INDOOR UNIT-40 VA

FOR CONDENSING UNITS

Figure 3

G61 V, G60V SIGNATURE

81MO7

INDOOR THERMOSTAT

UNIT A92 A2

TBI

I,Gs,_ ®1

I _ _'_

--Co)I

YLW : _ --@I

RED } 230

RED

BLUE HI SPEED

YELLOW LOW SREED

BLACK COMMON 2¢V

GREEN

--------Hn

C5 6ROUND

CAPACITOR___ L_

COMPRESSOR

CONTACTOR

CBSIMV, CBX32MV SIGNATURE

INDOOR B IM27

UNIT TRERk_ST_T

TB IA2

,_-_ ®1

L_ -------@ I

I [] ----e i

I '_ [] --------@ I

[] --_---0 I

_r----@l ,-@)

-,e---------INDICATES OPTIONAL COMPONENTS

_LINE VOLTAGE FIELD INSTALLED

-- -- --CLASS II VOLTAGE FIELD INSTALLED

GE VARIABLE FAN MOTOR B$'

COOLING UNITS-

LENNOX CONDENSING UNITS

xc2_-o_-2so

xc2_-os6-_so

xcz_-o_e-zso

xcz_-o6o-zso

0406 Su_erlede_ F°r_ N_*

No_ Form No,

554,862W

Page 4

HPXA19-038 Wiring Diagram

KIDS

SOLENOID RELAY

AI32

OIABNOSTIC

MORULE

TAS_

CAPACITOR TRANSFORMER

$4 RT21 SZ5

PRESSURE COIL

SWITCH SENSOR THERMOSTAT

587 LOW $5 RTI 3

PRESSURE OISCH TEMP REVERSING

SWITCH SWITCH VALVE

_ _ _ ANBIENTSENSOR_

L, COMPRESSOR

CONTACTOR

(

I--5€0

EOUIPMENT

GROUND

COMPRESSOR

CONTACTOR

DE_OST CONTROL

n FAN_

E CC

YI OUT

L=_-PS R 0

_RV

3-OUT

COIL

OR_

v v

:o_ESSl

;ONTACTOf

NOTE-

A_ FOR USE WITH COPPER CONDUCTORS

ONLY.REFER TO UNIT RATING

PLATE FOR MINIMUM CIRCUIT

AMPACITY AND UAXI_JM OVER-

CURRENT PROTECTION SIZE

REFER TO COMPRESSOR IN UNIT

FOR ACTUAL TERMINAL ARRANGEMENT.

/_k WARNING-

ELECTRIC SHOCK HAZARD,CAN CAUSE INJURY

OR DEATH.UNIT MUST BE GROUNDED IN

ACCORDANCEWITH NATIONAL AND LOCAL CODES.

REMOVE JUMPER FOR _STAOE COOL

RTI4 SENSOR, OUTDOORTEMP (OPTIONAL)

BLACK

RED

RTI5

•B_ £23 CLOSES AT LOW AMBIENT TEMPERATURES TO

OPERATE SECONDSTABE COUPRESSORON HEATIND

/_ LSA SOLENOID IS LOCATED IN COMPRESSOR,

COIL IS 24VOC, DO NOT CONNECT 2AVAC

TO COIL TERMINALS

SII, K159 AND K58 ARE OPTIONAL LOW

ANBIENT CONTROLS

SIGNATURE

51U28

CB51MV A2

CBX32MV THERMOSTAT

TBI Nh

.....ii

(uir

0- ®

.4)- -Q

--LINE VOLTARE FIELD INSTALLED

-- -- --CLASS II VOLTARE FIELD INSTALLED

6E VARIABLE FAN MOTOR (B4)

HEAi PUMP

LENNOX OUTDOOR UNITS

LOW AMBIENT KIT FOR

HPXAI 9-038-230-02

OSOG !Super$*_*s Fo_= No

Ntw F_m No.

534-, 452'//

(_;{_06 _.t_nll Intullflll In=. LIth_ U.S.A.

Figure 4

Page 5

XP19 Wiring Diagram

A132

DIAGNOSTIC

MODULE

CAPACITOR

J,_7_

P47[ZZZ]

AI08

DEFROST CONTROL c(_OIL GROUNDI-_

LUG

(_OUT

_oPs COM%ESSOR

CONTACTOR

(_2 OUT °

OM 0

o°Y,OUT

,PS

RT21 RT I5 RT2B

DEFROST AMBIENT DISCHARGE

COIL SENSOR SENSOR

SENSOR

@@@

HIGH BI L_

PRESSURE COMPRESSOR

SWITCH

$87 LOW k I

PRESSURE REVERSING

SWITCH VALVE

©@

HR, B'fA66111

, _I_ L_AIII

_X AI5

EOUIPMENT I _I _ 1 I

COMPRESSORI _ I I

_,_TA_RJ "IREDI

LZ _ --

RED

BLUE Z_

^ N .,-.FT--(_

/9_ /_ E:(,_ _.DIS

oOUT

L_ NOTE-FOR USE WITH COPPER CONDUCTORS ONLY.

REFER TO UNIT RATING PLATE FOR MINIMUM

CIRCUIT AMPACITY AND MAXIMUM OVERCURRENT

PROTECTION SIZE

/_ REFER TO COMPRESSOR IN UNIT

FOR ACTUAL TERMINAL ARRANGEMENT.

/_ WARNING-

ELECTRIC SHOCK HAZARD,CAN CAUSE INJURY

OR DEATH.UNIT MUST BE GROUNDED IN

ACCORDANCE WITH NATIONAL AND LOCAL CODES,

/¢X REMOVE JUMPER FOR TWO STAGE COOL

RTI¢ SENSOR, OUTDOOR TEMP (OPTIONAL)

•_ L3€ SOLENOID IS LOCATED IN COMPRESSOR,

COIL IS Z4VDC, DO NOT CONNECT Z4VAC

TO COIL TERMINALS

L_ OZ¢ UNITS COME FACTORY WIRED FOR LOW

OUTDOOR FAN SPEED ONLY, HIGH SPEED Y2,

(BLUE WIRE) IS NOT CONNECTED

K4g RELAY FIELD ADDED FOR TWO SPEED

OR VARIABLE SPEED AIR HANDLERS

L_ OPTIONAL LOW AMBIENT CONTROLS

r 17y_c_-

ifFREEZESTAT

I_-_o--- -

I ISA__

K_ lllr ....

_h IIII r-----

lllllr-

Iiiii ----

I II I I

--_ i Iii I

l_Tx. J!II I ,

|II_ _ II_ i I

IJqll

I _,_ ___ ___ .i_J 7

z4v 4''v' I I'

I d_.._- I__J_J II

L_U_J.

Ir_"_sl-I _KI59

K58

SIGNATURE

CB31MV 81MZB

RTI4

)

_LINE VOLTAGE FIELD INSTALLED

.... CLASS I VOLTAGE FIELD INSTALLED

GE VARIABLE FAN MOTOR (B4)

LENNOX HEAT PUMP

OUTDOOR UNITS

XP 19-024-230 XP I 9-048-230

XP 19-036-230 XP 19-060-2.50

0606 [S_w,r_,e_ Form No,

New Form NO,

554,863W

(_20_ L*_X Ifl_Ilrt@l I_¢. Lit_o U,S*A.

Figure 5

Page 6

LENNOX Controls And HVAC Accessories Manual L0806307

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