DeLUX DP, Operation Manual

Page: 163 / 298

Gas Electro-mechanical Valves
w w w . m a x o n c o r p . c o m
combustion systems for industry
Maxon reserves the right to alter specifications and data without prior notice.
© 2009 Copyright Maxon Corporation. All rights reserved.
10 - 30.1 - 31
E - m - 10/09
Installation
1. A gas filter or strainer of 40 mesh (0.6 mm) or smaller is recommended in the fuel gas piping to protect the downstream safety
shut-off valves.
2. Properly support and pipe the valve in the direction of the flow arrow on the valve body. Valve seats are directional. Sealing
will be maintained at full rated pressures in one direction only. Sealing will be provided in reverse flow only at reduced pres-
sures.
3. Mount valve so that open/shut window indicator will be visible to your operating personnel. The open/shut window indicator
should never face downward. The valve side plates should be located in a vertical plane for best performance. Valves are
usually installed in horizontal piping; however, other 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.
4. Wire the valve in accordance with all applicable local and national codes and standards. In U.S. and Canada, wiring must
conform to the NEC ANSI/NFPA 70 and/or CSA C22.1, Part 1.
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Supply voltages must agree with valve’s nameplate voltage within -15%/+10% for proper operation. For electrical wiring
schematic, see instructions or sample affixed inside valve terminal block cover.
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Grounding is achieved with a grounding screw, which is located in the top assembly.
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Customer connections are provided via terminal blocks located in the top assembly.
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Main power wiring (120 VAC or 240 VAC) must be segregated from lower voltage 24 VDC signal wiring, when both are
required.
5. Maintain integrity of the electro-mechanical actuator enclosures by using the appropriate electrical connectors for the (2) 3/4”
NPT conduit threaded connections. The electrical enclosure is NEMA 4 rated with an option for NEMA 4X.
6. All access cover plate screws should be tightened using an alternate cross-corner tightening pattern to the values shown in
Table 1 on page 10-30.1-31.
7. Verify proper installation and operation by electrically actuating the valve for 10-15 cycles prior to the first introduction of gas.
Auxiliary features
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Non-adjustable proof of closure switch(es) with valve seal over travel interlock
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Auxiliary switch for indication of full travel (open for normally-closed valves, closed for normally-open valves)
Operating environment
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Actuators rated for NEMA 4 or optional NEMA 4X
„
Ambient and fluid temperature range of -28°C to 60°C for standard and CP flow constructions
„
Ambient and fluid temperature range of -28°C to 52°C for high capacity flow constructions
„
All valves for oxygen service or using Ethylene Propylene body seals are limited to a minimum ambient and fluid temperature of
-18°C
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