Grain Systems PNEG-526 - Manual (Page 189)

OPERATING SEQUENCE
42-VA
Form 6642 VA
Single Burner Supervision, Manual Ignition,
Plug-in FLAME Plug-in Control Relays
Power on terminals and L2 3) N.O. contact in main valve circuit closes
provides power to electronic network.
to energize main valve (thru N.O. CHECK
relay contact). Neon light on
PROTECTOFIER chassis will glow to
Terminal L I must be powered before terminal 12.
dicate flame is established.
Power on PROTECTOFIER terminal (thru permissive
safety limits circuit) permits manual pushbutton ignition.
I Press and hold " S T A R T pilot pushbutton.
a. CHECK relay "C" is energized thru N.C.
contact of " A C F FLAME relay
Ignition transformer is energized thru contact of
"START" button (from PROTECTOFIER
terminal 4 ) to provide spark ignition to the pilot.
c. Pilot solenoid valve is energized to open (from
PROTECTOFIER terminal 4).
2. With pilot flame established FLAME relay
is energized.
a. FLAME relay contacts transfer.
I N.C. contact in safe-start checking circuit
opens.
2 ) N.O. contact between terminal and
terminal closes providing holding circuit
around "START" pilot push-button contact.
3. Release "START" button. Ignition is
de-energized.
Flame failure during operation de-energizes fuel
Power interruption to PROTECTOFIER terminal I
de-energizes relays and fuel valves.
Failure of Check Relay prove safe-start
prevent energizing fuel valves and ignition
Power Equipment Company
Manufacturers
Representative
201 1 Rd. Richmond. VA 2323 1
(804) (804) 236-3882
INSTALLATION, OPERATION AND MAINTE-
NANCE SHALL CONFORM
NATIONAL
PROTECTION ASSOCIATION STAND-
ARDS, NATIONAL AND LOCAL CODES, AND
AUTHORITIES HAVING JURISDICTION. ANY
MODIFICATION APPROVALS.
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