Munchkin HIGH EFFICIENCY HEATER with the "925" Controller Operating Instructions Manual page 11

DIAGRAM "A"
WIRING DIAGRAM CONNECTING TO CIRCULATOR
GREEN (GROUND)
WHITE (NEUTRAL)
BLACK
NORMALLY OPEN
THERMOSTAT
CONNECTION
GRAY
T
GRAY
T
ELECTRICAL
SWITCH JUNCTION BOX
120V 60 HZ
Figure 2-1: Connection Wiring Directly to
Central Heating Circulator
ZONE
THERMOSTAT
R845A
SWITCHING
RELAY ZONE
1K1
T
T
1
L1 HOT (BLACK)
120 VOLT
L2 NEUTRAL
(WHITE)
Figure 2-3: For circulator amp loads greater
than 4 amps (3 amps for "HA" models) use the
wiring diagram shown at left. The brown and
orange wires will not be used in this
application.
WHITE
(NEUTRAL)
BLACK
(HOT)
GREEN
(GROUND)
BOILER
"TT"
GRAY
5
3
1K1 1K2
BOILER
2
4
6
"TT"
GRAY
ZONE
CIRCULATOR
DIAGRAM "B"
WIRING DIAGRAM WITHOUT CONNECTION TO CIRCULATOR
NORMALLY OPEN
THERMOSTAT
CONNECTION
GRAY
T
GRAY
T
ELECTRICAL
SWITCH JUNCTION BOX
120V 60 HZ
Figure 2-2: Connection Wiring without Wiring
Central Heating Circulator
Note to Electrical Contractor: The orange
wire is 120 Volt/4 Amp maximum for central
heating circulator only. Loads greater than 4
amps or 3 amps for HA models only will blow the
fuse on the board. The brown wire is the neu-
tral wire for the central heating pump only.
ELECTRICAL
IMPORTANT NOTE:
BE CERTAIN THAT THE ORANGE
WIRE IS SECURELY CAPED.
FAILURE TO DO SO COULD
RESULT IN INJURY OR FIRE
AND COULD DAMAGE THE CONTROL.
WHITE
(NEUTRAL)
BLACK
(HOT)
GREEN
(GROUND)
GROUND
BUS
11