LENNOX Air Conditioner/heat Pump(outside Unit) Manual L0806427

User Manual: LENNOX LENNOX Air conditioner/heat pump(outside unit) Manual LENNOX Air conditioner/heat pump(outside unit) Owner's Manual, LENNOX Air conditioner/heat pump(outside unit) installation guides

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TeCh n ical

KITS COMMON TO COOLING
AND HEAT PUMP EQUIPMENT

blications
Litho

U.S.A.

,_) 2005 Lennox Industries Inc.
Dallas, Texas, USA
505,002M

04/2005
INSTALLATION

LOSS OF CHARGE

INSTRUCTIONS
FOR LOSS OF CHARGE KIT (LB-110135
USED WITH CONDENSING
UNITS AND HEAT PUMPS

KIT

/ 84M23)

Package 1 of 1 contains:
1 - Loss of charge switch ($24)
2 - Wire nuts
NOTE - The depressor tee fitting provided with this kit is
used to install the loss of charge switch on the liquid line
service valve.

1 - Valve depressor tee fitting

The loss of charge kit (LB-110135A/84M23)

is used with

all condensing units and heat pumps which use either
R-22 or R-410A refrigerant. The loss of charge switch
protects the system compressor from damage due to a
loss of charge, The single-pole / single-throw, normally
closed switch is permanently adjusted to open at 25 psig
(+5 psig), The switch automatically resets (closes) at 55
psig (+5 psig),

WARNING

1 - Disconnect power to unit,
2 - Install the provided loss of charge switch on an open
port (no valve core) of the provided valve depressor
tee fitting,
NOTE - The pressure switch must be installed
before the depressor tee fitting is installed in
order to avoid refrigerant loss.
3- Install the depressor tee fitting on the liquid line
service port, See figure 1 for illustration of typical
installation,
4 - Check for leaks,
5-Wire
loss of charge switch in series with the
compressor contactor coil. Refer to wiring diagram on
unit and to field wiring diagrams in figures 2 and 3,
6 - Turn on power to unit,

TYPICAL INSTALLATION LOSS OF CHARGE SWITCH
TOP VIEW

_-=_LIQU
t

ID LINE

!

SERVICE VALVE

:_

I

/

LOSS OF CHARGE
SWITCH
CAUTION "compressorAV°id
shorting controINEwtoSERViCE
_
PORT
VALVE DEPRESSOR
TEE FITTING

CAUTION - Loss of charge switch
must be installed on open side of
tee first to prevent refrigerant loss.

FIGURE 1
04/05

IIIBIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

505,002M
Page 1

IIIBIIIIIIIIIIIIIIIIIIIIIIIIIIB

LOSS OF CHARGE SWITCH WIRING
FOR AIR CONDITIONING UNITS

LOSS OF CHARGE SWITCH WIRING
FOR HEAT PUMP UNITS

9
f

RGE

G

FROM

_]

S24

THERMOSTAT

_

LOS%_/vFTCFH
ARGE

\

PRESSURE
SWITCH
(IF USED)

T H E_R_MOoMs
TAT

H, H
,,_
.,_

_1

*NOTE - If DL15 (compressor

OI
I

will be wired between the loss of charge switch
(S24) and the compressor contactor, Please refer

delay ) is used, it

{_

to wiring diagram located on the unit.

*NOTE-If DL15 (compressor delay ) is used, it will
be wired between the loss of charge switch ($24)
and the high pressure switch ($4), Please refer
to wiring diagram located on the unit.

K1

_LcoMP#SSOR
k

..COMPRESSOR

CONTACTOR

kJ

_

= TO COMMON

FIGURE 2

CONTACTOR

= TO COMMON

FIGURE 3

Page 2
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