Installation instructions, Corporation – Grain Systems PNEG-526 User Manual
Page 116
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CORPORATION
MUNCIE, INDIANA, USA
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
Page 6100-S-2
Electro-Mechanical Valves
Installation Instructions
(cont'd.)
orientations are acceptable, subject to the
above limitations. The top assemblies of all
Maxon valves are field rotatable to allow
installations involving conflicts with these
mounting restrictions.
F. Main system shut-off should always use a
manual leak-tight upstream fuel cock.
G. Time lag between valve action and fluid flow
(or flame response) is reduced if valve is
located near the burner (or outlet).
4.
Wire the valve in accordance with all applicable
codes and standards. Supply voltages must agree
with valve’s nameplate voltage within -15%/+10%
AC or DC for proper operation. For electrical
wiring schematics, refer to appropriate Maxon
catalog literature and/or the wiring schematic
diagram affixed inside your valve’s access cover
plate or in the terminal block cover housing.
A. The Maxon valve must be electrically
interlocked with your safety-limit devices in
accordance with all applicable codes, stan-
dards, and the authority having jurisdiction
over the safety requirements for your overall
system installation. Normally, Maxon valves
are electrically wired in series with all of your
safety-limit devices. Therefore, any one
device can cause the valve to react. Each
valve was production tested when manufac-
tured. If it now appears inoperative, make
sure it is being powered properly from and
through your control circuit.
B. Maintain integrity of Maxon top assembly
enclosure by using dust and water-tight
electrical connectors. Use cable-sealing grips
and strain-relief loops for any cord or cable.
Use internal sealing materials on all conduit
connections. Moisture can have a harmful
effect on valve internals if permitted to enter
through wiring connectors. Make sure that all
access cover plates are in place and securely
fastened. All cover screws should be tight-
ened using an alternate cross corner tighten-
ing pattern to the values shown below.
While all covers are torqued at time of produc-
tion testing, torque should be rechecked
periodically to ensure adequate sealing
protection.
5.
Pre-operational exercising:
Prior to initial fluid flow start-up and with upstream
manual cock still closed, operate the valve
electrically for 10-15 cycles. This not only pro-
vides an electrical check, but also wipes valve
body disc and seat free of accumulated foreign
matter.
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