G—G770BGJ 100% Lockout, Microprocessor-Based Intermittent Pilot Ignition Control 7
!
CAUTION: Equipment Damage Hazard. Connect the high-
voltage cable to the spark transformer terminal and
spark electrode (pilot burner assembly) before
applying power to the control. Ensure that the ground
wire is attached to the pilot burner and control ground
terminal strip.
!
CAUTION: Equipment Damage Hazard. Locate all limit and
operating controls in series with the thermostat
terminal (THS 2) on the ignition control.
All wiring should be in accordance with the National Electrical Code
(NEC) and all other local codes and regulations. The high-voltage spark
transformer cable must not be in continuous contact with a metal surface.
Use standoff insulators. Ensure that the flame sensor wire and high-
voltage spark transformer cable are separated from one another by a
minimum distance of 6.35 mm (1/4 in.) and not wrapped around any pipe,
other wiring, or accessories.
Check the voltage rating marked on the control and make sure it is suited
to the application. Use an NEC Class 2 transformer to provide 24 VAC
under maximum load, including valves. A transformer having excessive
primary impedance due to poor coupling will affect the ignition potential.
T ra n s fo rm e r
T h e rm o sta t
Lim its in
T he rm ostat
Line O nly
M ain B urner
G round
P o we r
S u pply
P ilot B urner/
Ign ite r-S ensor
A ssem bly
G 770 B G J
Ign itio n C ontro l
S E N S E
T H S
M .V .
P .V .
P ilo t G as
S up ply
L E D
G
R
O
U
N
D
P ilo t V a lve
M ain V alve
P V
M V
A
B
A
B
2
1
3
4
Figure 3: Connection Diagram
Electrical
Connections