Nordyne Light Commercial Air Handler B5SM -090 - Manual (Page 13)

13
SINGLE PHASE
THREE PHASE
G C
W2 W1 O/B
Y R
G C
W2 W1 O/B
Y R
L2 L1 G
L3 L2 L1 G
L1
L2
G
FIELD SUPPL
Y CONNECTIONS
L1
L2
L3
G
FIELD SUPPL
Y CONNECTIONS
L1
L2
T1
T2
L1
L2
T1
T2
L3 T3
208-230/460V
460
208-230
460
208
- 230
Electrical Configurations
1.
Three phase units are factory wired f
or
460V/60Hz or 380V/50Hz operation. 2.
T
o re
ver
se motor r
otation,
inter
change
an
y tw
o field wired line leads.
7109700
1009
FIELD WIRING
LEGEND:
LO
W V
OL
T
A
G
E
B5SM Series 7.5/10T Air Handler Systems
GENERAL NO
TES:
THREE PHASE ONL
Y NO
TES:
1.
Disconnect all po
wer bef
ore servicing.
2.
If wiring m
u
st be replaced,
use onl
y
105˚C copper wire of the same gaug
e
.
3.
For economizer application,
remo
ve blac
k wire
fr
om lo
w v
oltage boar
d
“Y”
terminal and connect
to yellow wire fr
om economizer
.
3.
Three phase
, 60 Hz units ma
y be
configured f
or 208-230V operation b
y
relocating the internal selector pin at the rear of the motor as sho
wn belo
w
.
(See pr
oduct literature f
o
r more
inf
ormation,
if necessar
y
.)
Frequency
Single Phase
Three Phase
60 Hz
208-230V
208-230/460V
50 Hz
220V
380V
GREEN
BLA
CK
BLA
CK
SEE
NO
TE 3
BLA
CK
SEE
NO
TE 3
GREEN
BLA
CK
BR
O
W
N
FREEZEST
A
T
BR
O
W
N
FREEZEST
A
T
Y
Tstat
Y
Tstat
Figure 6. Wiring for Single and Three Phase Units
ELECTRICAL INFORMATION