55
F
ig.
38
— 5
0
BVC,E,
Q0
20-
03
4
Co
ns
ta
nt
V
o
lu
me Wiring Sc
he
m
a
tic
a50-8250
LEG
E
ND
NO
TES:
1.
Se
e u
n
it
na
mepla
te
fo
r el
ectr
ical
ra
ti
ng.
2.
All
f
ield
wir
ing
m
u
st
b
e
i
n
a
c
cor
dance
wit
h NE
C-NF
P
A
#70.
3.
208
/2
30-v unit
s
are f
a
ct
or
y wire
d
f
o
r 208
-v
o
per
ati
on.
F
o
r 230
-v
o
per
a
tio
n,
r
e
mo
v
e
O
R
G lead
a
nd rep
lace
with RE
D le
ad. Cap
a
ll u
n
u
sed
le
ads
.
4.
Chec
k p
hase r
o
tati
on o
n
all
sc
ro
ll comp
ressor u
n
its
. Re
v
e
rse ro
tation
will
damage
the comp
ressor an
d
v
o
id unit
w
a
rr
an
ty
.
5.
F
o
r
a
lte
rnat
iv
e EMS coil v
o
lta
ges
, consult
f
a
ctor
y.
6.
UPM boa
rd includ
es
b
u
ilt in 30
t
o
60
-second r
a
ndom
st
ar
t,
5
-min
u
te de
la
y on
b
reak,
90-second
l
o
w
p
res-
sure
b
y
p
a
ss
, a
nd
5-second
second
st
age
del
a
y.
7.
Se
tt
ing t
he UPM
b
oard
t
e
st
mod
e
j
u
mper t
o
y
e
s
re
duces all time
d
e
la
ys to
5 second
s
.
8.
“F
re
ez
e
” pins on U
P
M
b
oard
m
u
st
be jumped
if
fr
eez
e
sen
s
o
r
is
not
insta
lled.
St
anda
rd C
o
mpone
nts Leg
end:
#1
—
First St
age
#2
—
Second
S
tag
e
BM
—
Blo
w
er
Mot
o
r (1
or
2
pe
r Un
it)
BR
—
Blo
w
er
Rel
a
y
CB
R
—
24-v
a
c Circuit
B
reak
e
r
CC
—
Compressor Cont
act
o
r
CPM
—
Compressor
Pr
ote
c
ti
on
Mod
u
le
(15
T
o
n
an
d
Large
r Co
mpressors)
HPS
—
High Pre
s
sur
e
S
witch
LP
S
—
Lo
w P
ressure
Switch
RV
—
Re
v
e
rsin
g V
a
lv
e
Opt
iona
l Co
mpone
nts
Lege
nd:
AU
X
—
A
u
x
iliar
y
Rel
a
y (f
or Pu
mps
, V
a
lv
es
, etc.)
BMR
—
Blo
w
er
Motor
Rela
y
CMF
R
—
Compressor Malfun
c
tion Rela
y
CMR
—
Compressor Mon
ito
r
Rel
a
y
CS
—
Conde
nsate
S
ensor (On
e
per Dr
ain
P
a
n)
EMS
—
Ener
g
y
Manag
ement
Syst
em Rela
y
FS
—
F
reez
e Sen
s
o
r
HGL
—
Hot Ga
s Limi
t (By
p
a
s
s
Only
)
PM
—
Phase Mon
ito
r
F
a
ct
or
y
Wire
Fie
ld
Wire
TRANSFORMER PRIMAR
Y
LEAD COLOR
120
Whi
te
208
Red
240
O
rang
e
277
Br
o
w
n
380
P
u
rp
le or Y
e
llo
w
460
Blac
k/
Red
575
Gra
y