1 60-2034—7
RA890F
Flame Safeguard
Primary Control
The RA890F Protectorelay™ Primary Control
is a nonprogramming, amplifying relay that pro-
vides solid state electronic flame safeguard pro-
tection for industrial and commercial gas, oil, or
combination gas-oil burners.
■ Employs rectification principle of electronic flame
detection using a flame rod, rectifying photocell, or
C7012A,C Ultraviolet Flame Detector.
■ Clipping pilot link jumper wire permits use with
standing pilots.
■ Can directly replace RA890E and mount on same
Q270A Subbase.
■ Solid state circuitry eliminates vacuum tube replace-
ment and increases resistance to vibration. Power
application not required during Off cycle; no tube to
warm up before starting.
■ Push-to-reset safety switch in dust-resistant enclosure.
■ Built-in protection against ignition crossover in flame
rod systems.
■ Does not start if flame-simulating failure occurs in
flame detector circuit.
■ Automatic safety shutdown if flame fails on start, or
if flame not re-established after flame failure.
■ Flame signal current is directly measurable at test
jack.
■ Line or 24 volt, automatic or manual controller can be
used. (Manual controller must open circuit on either
power or flame failure.)
■ Captive mounting screws allow easy mounting and
removal. Thermoplastic mounting base.
■ Optional alarm circuit indicates safety shutdown.
S.Y. • Rev. 11-94 • ©Honeywell Inc. 1994
60-2034-7
CONTENTS
Specifications ................................................. 2
Ordering Information..................................... 2
Installation ..................................................... 4
Operation ....................................................... 7
Checkout......................................................... 8
Service .......................................................... 10
Troubleshooting and Maintenance ..............10
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