Page 450 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair

428 Major Process Equipment Maintenance and Repair

Junction Box

Junction boxes should always remain closed except during the actual
installation period. In no case should it be allowed to stand open over-
night or for extended periods. This will protect the electrical circuitry
from dirt, rain, moisture and other sources of potential electrical abuse.

Electrical Conduit Seals

If the process gas is combustible, electrical conduit seals are to be
poured only after verifying that all electrical components and circuitry
are functioning correctly.

Control Panel

Install and check instrument air lines and electrical sensor lines as indi-
cated on control panel junction box and system schematic drawings fur-
nished by vendor. Before applying power, check that there are no shorts
to ground.

Operating Instructions
Precautionary lnstructlons

If, after installation, it is believed there is significant possibility of in-
jurious foreign matter having entered the unit, it must be disassembled
and all parts cleaned and reassembled before initial startup. Verify that
the cold section of the expander is free of oil or grease. Assembly and
disassembly instructions must be carefully observed.
This may be a good time to have the manufacturer’s service person in-
struct your operating personnel in the assembly and disassembly of the
unit.
It should be noted that there is a danger of overspeed until the compres-
sor suction reaches design pressure. The expander could reach full speed
with less than full expander power until the compressor suction design
pressure has been established.

Procedure for Filling Reservoir

Refer to the system schematic drawing furnished by the expander man-
ufacturer.
Fill the lube oil reservoir with lubricant in accordance with specifica-
tions given by the manufacturer.