9
■
Manual ignition (intermittent pilot)
Handling Precautions
• If the power supply high potential (H) and low potential (G) are differenti-
ated, connect the high potential to terminal 1 and the low potential to ter-
minal 2.
Chapter 2. MOUNTING AND WIRING
High potential
(H)
Low potential
(G)
Main valve 1
Main valve 2
Ignition
transformer
Pilot valve 1
Flame detector
Start check circuit
8
3
1K
1K
2K
4
Combustion
lamp
Power
Ignition switch
Flame voltage
0-5 Vdc
Internal circuit
B
A
7
Subbase
Burner start
contacts
(F)
(G)
6
5
Flame
amplifier circuit
2K
Power circuit
2
1
−
＋
Pilot valve 2
Prepurge
completion
signal
Blower on-off circuit /
Prepurge circuit
Limit/Interlock circuit
(limit switch, interlock switch)
Operation
input circuit
* The combustion lamp lights up
when the ignition switch is turned on.
*
Summary of Contents for FRS100
Page 10: ......
