York EX Series Installation, Operation & Maintenance Instructions Manual page 50

SECTION 4 - TECHNICAL DATA
FIGURE 11 - POWER SUPPLY WIRING (CONT'D)
50
Air Full
Pressure Close
Switch Confirm
Main
Pilot Ignition
Shut-Off
Valve(1) Transformer
Valve(1)
Main
Pilot
Shut-Off Valve(2)
Valve(2)
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
Full Full
Close Open
Confirm Confirm
Flame
Detector
LD20251
JOHNSON CONTROLS