Conair HTC 120, Руководство пользователя

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3-70
l I n s t a l l a t i o n - C o n t r o l & C o m m u n i c a t i o n W i r i n g
Connecting the RTD Sensors
(HTC only)
The routing of the RTD sensor cables should be neat and not parallel with the
power connections. When a sensor cable must cross over power wiring, the inter-
section should be made at right angles (90 degree) to reduce the RFI noise trans-
mitted to the sensor cable.
Process Temperature RTD Probe
The process RTD sensor connection should be made to the HTC’s control panel
CAUTION:
Always disconnect and lock out the main power sources before making elec-
trical connections. Electrical connections should be made only by qualified personnel.
1
Disconnect and/or lock out main power to
the HTC.
2
Route the process temperature RTD cable
from hopper inlet to the HTC’s control
panel.
Plug the connector into receptacle in
the side of the control center labeled
“Process”. Hand tighten the connector. Coil
any excess cable and secure it with a wire tie.
Process Protection RTD
Probe
The process protection RTD probe is a safety sensor that prevents the HTC’s
heater from overheating in case of a process temperature sensor failure or insulated
hose failure.
The process protection RTD sensor senses the temperature leaving the heater
assembly to prevent damage to the process or the product in the CH Hopper. It
generates an alarm (A-49 or A-50) at the HTC control panel and shuts the heater
off if the air temperature exceeds the process protection setpoint. The element for
this sensor is to be mounted in the heater assembly outlet nozzle before the insulat-
ed hose is connected.
IMPORTANT: Always refer
to the wiring diagrams
that came with your HTC
before making electrical
connections.
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