Sterlco Royal Series Compact Temperature Control Unit - Manual (Page 31)

Royal Series Water Temperature Control Units Page 31
Pressure Switch
A pressure switch built into each unit keeps the system from
starting until the water supply is turned
On and subjected to the
minimum water supply pressure. This feature protects the pump
seal and the heater from damage through attempted operation
without water. The pressure switch is set at approximately 16 psig
(110.32 kPa/1.10 bars) for 250°F (121ºC) units or 55 psig (379.23
kPa/3.79 bars) for 300°F (149ºC) units prior to leaving the factory.
4-2 The Microprocessor Controller
These temperature control units can be manufactured with different
controllers (M2B, M2B+, or any off-the-shelf PID controller).
Please refer to your enclosed controller manual for a detailed
description of the operation of the controller.
4-3 Operating the Unit with the Controller
M2B
Start Up
1. Turn disconnect switch to ON position.
2. Press START. The unit will automatically vent for approximately one
minute.
3.
4. If needed, press and hold the vent button to purge any additional air
from the process loop.
5. Set process temperature (SETPOINT) by pressing the Up
Arrow or Down Arrow keys.
6. If the unit does not maintain its process value, allow your process to
reach the set point temperature. Refer to the controller manual
should the controller need to be tuned.
Shut Down
1. Push STOP button.
2. Turn disconnect switch to OFF position.
Disconnect Switch