RS COMPACT FREEZE TUNNEL, Руководство по эксплуатации и обслуживанию

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OPERATION & MAINTENANCE MANUAL
CompactFreezer
17
5.1. ELECTRICAL WIRING CONNECTIONS
Typically, a single 2” conduit will be required to connect the cabinet on the freezer. Consult the wiring
diagrams inside the control box for proper sizing and location. For trouble ‐ fee operation of the
temperature control system, the shielded cable for the RTD sensors should be run in a separate conduit
away from control and power wiring
In Control Box and Apparatus Boxes (control panels mounted on wall)
A. Mixed voltages (AC or DC) from 110V up to 600 volts can be bundled and run together
without any appreciable problems.
B. Signal wires (usually shielded cable) must be run separately from the higher voltage
wires as far away as possible, and no closer than 6 inches. If the wires must cross each
other, they should do so at 90°. Terminal lead lengths should be as short as possible
with shielding grounded at one end only, preferably at the controller end. The location
of the controller and shielded wire should be as remote as possible relative to any AFC
generating unit controller to prevent pick
‐ up of RF noise. Six inches is too close.
1. Earth Ground – Earth ground must be attached to the unit’s chassis to make it
noise free
2. Neutral – It is necessary to assure that neutral is at, or near, ground potential.
A voltmeter check between neutral and ground should show no more than 50
millivolts.
In Conduit, Pipe or EMT
A. Control wires (115V) and power wires up to 600 volts (including DC) can be contained in the
same conduit unless specified otherwise by local code regulation! This conduit terminates on a
designated apparatus box, usually the number 1 module.
B. Signal wires for the RTD temperature probes (very low voltage and amperage). In our case, this is
the 3‐wire shielded cable which must be run in its own conduit. Each conduit should originate
from each apparatus box that contains a probe, and rise vertically to normal ceiling height where
these conduits may junction for the main signal run to the control cabinet. Keep at least 6 inches
from other conduits.
5.2. LN
2
SUPPLY CONNECTION
lock out/tag out (