309 B/C – 03/03 A
– page 18/28
Model M4AC120C/150C
Cooling only version
RETURN AIR TEMP
. SENSOR
ENTERING WA
TER TEMP. SENSOR
LEAVI NG WATER TEMP
. SENSOR
ALARM
IND
ICATOR
AC
/DC SUPPLY
THERMAL OVERLOAD RELAY AMPS
12
.9A
14
.4A
SYMBOL
SYMBOL
SYMBOL
DESCR
IPT
ION
COMPRESSOR
DESCR
IPT
ION
PHASE PROTECTOR
DESCR
IPT
ION
FUSE
??
W
ATER PUMP
FAN MOTOR
CONTACTOR
COMP
. LP S
W
ITCH
COMP
. HP S
W
ITCH
W
ATER FLO
W
S
W
ITCH
JP SETT
INGS
OPEN
Don
't
change
the JP se
tti
ngs and
the va
lue o
f
If
wan
t t
o ac
tiva
te
two way va
lve
in
te
rlock
func
tion
, l
et
JP6 open.
Fac
tory
W
ired
1.
04A
1.
68A
12
.9A
14
.4A
3.
4A
3.
4A
1.
04A
1.
68A
NOTES:
Fi
el
d
W
iri
ng
OPEN
OPEN
CAUT
ION
:
The se
tti
ng shown
in
the d
iagra
m
is
fac
tory set
pa
ra
m
et
ers (including ther
m
al
ove
rload
re
lays)