Overtemperature Protection - Process Technology DQ15D Instruction Manual

6 Remove the knockouts before reattaching the rear
cover or inserting the control in the panel.
7 Insert DQ15D through the prepared opening and slide
the retaining collar over the case from the rear of the
panel.
8 Hand tighten the collar, securely tighten the two (2)
collar screws.
9 Install a suitable liquid-tight conduit fitting through
the knock- out opening following manufacturer in-
structions and install field wiring.
10 Using the Power, Heating and Cooling Relay
Wiring illustration in this chapter, install the required
input and output wires. Use National Electric Code
and local codes for determining wire sizing, insula-
tion, terminations, etc.
This section provides wiring notes for Power Heat-
ing/Cooling relays and Overtemperature Protection.

Overtemperature Protection

Component failure (sensors, relays, temperature con-
troller, etc.) in a temperature controlled process can
result in damage to the product, heater over tempera-
ture, and the possibility of a fire.
To safeguard against these events, install over tem-
perature protection. This will interrupt the heater power
supply in the event of low solution level.
Process Technology heaters include a thermal device
(Protector 1, 2, or 3) on the heater to monitor the heat-
er's surface temperature. When wired properly, these
devices cut the power to the heater in low solution level
conditions. In addition to thermal protection, Process
Technology requires the use of liquid level controls to
monitor the solution level and shut off the heaters prior
to an overtemperature condition occurring.
Ensure you read and adhere to all Over-temperature
protector installation instructions and warnings.
M-34-01-06 3/31/2016
Wiring
Overtemperature protection is necessary in
any system where a fault condition could pro-
duce a fire or any other hazardous condition.
Operation without thorough safety precautions
can result in equipment failure, property dam-
age and personal injury.
La protection de surchauffe est nécessaire
dans n'importe quel système où une condition
fausse avec résultat d'une temperature haute
pourrait produire une incendie ou autre condi-
tion dangereuse. L'opération sans les précau-
tions complètes de sécurité pourrait mener à la
défaillance de l'equipement, l'endommagement
de la propriété, ou des blessures.
Overtemperature Protection Device with Low Level
Cutoff Sample Wiring Diagram
(your wiring may differ)
3
DQ15D/T-DQ15D Manual