30
4.3
Cooling Solenoid Valve Maintenance
Note: For systems without a pressure regulator, consult factory for
maintenance/troubleshooting procedures of the cooling solenoid valve.
For Mokon temperature control systems equipped with both a cooling solenoid valve and an
optional pressure regulator with a safety relief, the following procedure can be used to detect which
valve, if any, requires maintenance or replacement.
With the system running cold (below 100
o
F / 38
o
C), set controller at 250
o
F (121
o
C) and disconnect
the 1/4" copper tubing from the pressure relief valve.
If water comes out of the copper tubing, the solenoid valve may require cleaning or
replacement. It may require cleaning, adjustment, or part replacement.
o
To Clean - Remove the coil from the valve. Remove center stem and flush with
water. Reassemble.
o
To Replace - Remove the valve from the system and replace.
With a system running at a constant temperature, disconnect the ¼” copper tube from the
pressure relief valve.
If water comes out of the pressure relief valve, then the valve is malfunctioning. The
pressure relief valve may need cleaning or replacement.
o
To Clean – Remove the adjust stem, spring, and piston. Clean any debris from the
seat and the piston then reassemble the pressure relief valve.
o
To Replace - Remove the pressure relief valve from the system and replace.
4.4
Low Pressure Safety Switch
Mokon Duratherm, Hydrotherm II, and Minitherm systems are equipped with low pressure safety
shut down switch as standard. This switch incorporates an interlock to prevent the operation of the
system should the supply water be insufficient. The switch is set to shut down at 8 PSI. CONSULT
MOKON FACTORY IF A PROBLEM IS SUSPECTED.
4.5
High Temperature Safety Switch
The High temperature safety shut off switch is located in or just after the heater manifold. This
switch is factory set to shut the Mokon temperature control system off. For Mokon temperature
control systems operating at a maximum temperature of 250
o
F (121
o
C), the switch will shut off the
system when the temperature reaches 260
o
F (127
o
C). For Mokon temperature control systems
operating at a maximum temperature of 300
o
F (149
o
C), the switch will shut off the system when
the temperature reaches 310
o
F (154
o
C). This switch should not be adjusted in the field. CONSULT
MOKON FACTORY IF A PROBLEM IS SUSPECTED.
NOTE: Refer to Section 1.8 for the No Flow Warning.
Содержание Duratherm
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