Service Manual Damcos LPU: General Service Instructions for LPU
SM 8000-100-01 Ed 04 February 2017
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LPU and Optional Equipment
The LPU can be equipped with additional equipment, such as switches, indicators etc. Further more
the LPU can be bulkhead mounted, mounted with blocks or otherwise mounted in respect to cus-
tomer requirements and system. Always check your specific system drawings and documents for
correct information. This manual is a guide on how to perform the service parts of your system. For
further information please contact Emerson service engineer or appointed agent.
Description
The LPU offers installation in both safe and hazardous area in two basic versions:
• LPU-S (fail safe) for single acting actuator
• LPU-D (fail set) for double acting actuator
Depending on safety zone requirements the LPU’s can be of Ex or Ex-ia, designed to meet the
requirements for mounting in hazardous areas. Be sure to use the designated equipment and spare
parts when performing service on your system.
The LPU system is designed to be controlled by two electrically different types of controls:
• Power controlled
• P-NET® bus controlled
The LPU can also be used as a stand-alone system.
LPU with an LED Position Indicator
LPU (except the Ex version) with an IP 68 LED indicator, showing clear RED or GREEN light when the
valve is CLOSED respectively OPEN is available in Power controlled and P-NET controlled LPU systems.
This may especially be useful if LPU is operated from a local hand pump, were the LPU is mounted in a
distance so the indication of the actuator is not visible. The LED must be supplied with 24 VDC.
LPU Mounting
The LPU can be mounted in the following ways:
• Direct mounting on BRC 250 - 16000, BRCF 250 - 16000, KC 65 - 400 and KF 65-250.
• Mounting on BRC 052, 072 and 092 is via inter-mediate block and with external position indica-
tion cable.
• Mounting on BRCF Fail Open and KF Fail Open is via special intermediate block.
• Mounting on BRC 125 and BRCF 125 has to be bulkhead mounted or supported otherwise.
• LPU may be bulk-head mounted via a standard B-block. - It is possible to use a B-block with inte-
grated VPI, (please see illustration). No external indication cable.
When decided on mounting method the pipe dimensions has to be considered as well.
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