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OPTIONAL BLOWER PACK ( BUILT-ON OR REMOTE )
TRANSFORMER
( IF REQUIRED )
DEDICATED
B L O W E R
DISCONNECT
PA C K
BY OTHERS
T E R M I N A L
S
S
S
B L O C K S
L3
L2
L1
EXTERNAL
x
x
x
INTERNAL
T R A N S F O R M E R
030 OR SMALLER)
3 P H A S E
C O N N E C T I O N
S
S
S
OPTIONAL
S
S
S
INTERNAL
FUSE BLOCK
(NHB 050
OR LARGER)
CONTACTOR(S)
INTERNAL
EXTERNAL
TWO SPEED SWITCH
3 A
FUSE
FAN
24 V
THERMODISC ( N.O. )
RELAY
COIL
T
INTERNAL
EXTERNAL
JUMPER OR
ON/OFF
CONTROLS
GROUND
IN SERIES
CLAMP
G
8 10
PRI. TERMINAL
BLOCK OR
OPTIONAL FUSE
BLOCK ( NHB
MAIN SWITCH
1/3
3 A
FUSE
1/2
1/1
STEP DOWN
2/3
TRANSFORMER
DOOR
2/1
2/2
INTERLOCK
SWITCH
24 V
COIL
FILL
24 V
VALVE
24 V
COIL
COIL
DRAIN
24 V
VALVE
COIL
HIGH
3
4
WATER
SENSOR
2
1
RED WIRE
6 8 10
2 4
S S
Si 1
Si 2
Si 1= 3.15A FUSE
Si 2= 3.15A FUSE
Sx % = MANUAL CAPACITY ADJUST
NHB HUMIDIFIER
w OR w/o OPTIONAL BLOWER PACK
(BUILT-ON OR REMOTE)
WIRING DIAGRAM NO. 92-0-A REV. 9
- 23 -
FAN
HIGH
LOW
OPTIONAL BLOWER PACK
MOUNTED ON/OFF HUMIDISTAT
or JUMPER
81
82
83
84
85
OPTIONAL REMOTE
YELLOW
INDICATOR
81
82
83
84
85
61
0N
OFF
DRAIN
4
7
6
8
STATUS
INDICATOR
LED's
Y
G
_
_
14 12 16
26 22 24
18 20
Sx %
NHB MAIN BOARD
RESETABLE
THERMODISC ( N.C. )
T
Y
20
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