Weil-McLain EGH-105 Control Supplement page 15

MANUAL RESET
PRESSURETROL
PRESSURETROL
BK
OPERATING
EQUIPMENT
CONTROL
GROUND
(NOTE 9)
(NOTE 7)
Y Y
THERMOSTAT
BK
OR EMCS
BK
BK
SERVICE
Y
W
SWITCH
G
G
(BY OTHERS)
G
H
C
R
BK
TRANSFORMER
120/24 V.A.C.
N
W
WIRE NUTS (2)
JUNCTION BOX
EGH-105 to EGH-125 EGH-105 to EGH-125
EGH-105 to EGH-125 EGH-105 to EGH-125 EGH-105 to EGH-125
(NOTE 6)
IMPULSE
MANUAL RESET
RELAY
PROBE LWCO
FLOAT LWCO
BK BK BK
Y
G
(NOTE 5)
R
G
BK
1 2
G
PLUG-IN
Y
DPST
RELAY
CABLE
TO
DAMPER
Control Supplement
SCHEMATIC WIRING DIAGRAM
MOMENTARY
SWITCH
R R
R
W
R
R
G
G
R
Y
G R
R
TERMINAL
BLOCK
A 1 A 2
PRE-WIRED PANEL
NOTE 10
CSD-1 control system — Natural gas
R
D
D
TH TR
W
ROBERTSHAW
BK W
R
GAS VALVE
MV
MV/PV
PV
R
ALARM
R
ALARM
Y
24V
G
24V (GND)
SENSE
SPARK
O
W
W
BK
PILOT
SOLENOID
VALVE
UNIVERSAL SPARK
IGNITION CONTROL
PILOT
(NOTE 8)