CF Series Portable Chiller : Air & Water-Cooled : 5 - 40 Tons
Page: 46
TEMPTEK, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-6352 Fax: 317-881-1277
Email: service@Temptek.com
5.4 AUTOMATIC WATER MAKE-UP SYSTEM service
A.
The automatic water make-up system consists of a level
switch (figure 5.4A) and a solenoid valve (figure 5.4B).
When the tank level is low the level switch signals the
solenoid valve to open allowing make-up water to re-fill the
tank.
B.
Level switch maintenance and service.
1.
The level switch contacts engage and disengage
the water make-up solenoid valve.
2.
Poor water quality can allow debris or a film build-
up on the level switch contacts which can impair
operation. Clean the contacts on a regular basis.
If cleaning the contacts does not remedy the
problem the level switch must be replaced.
C.
Make-up solenoid valve service.
1.
The make-up solenoid valve may require service
for a failed coil or more often it will not fully close
because debris from poor make-up water quality
is in the valve mechanism.
2.
To replace the coil, disengage power from the unit following all lock-out tag-out
procedures. Remove the wires from the failed coil and remove the coil from the
valve stem. Install the new coil on the stem and reconnect the wires.
3.
To service the solenoid valve follow the procedure below.
a.
Disengage process operations according to the procedure outlined
in section 3.4. Be certain process fluid pressure is relieved (coolant
pressure gauge reads “0”) and water system flow is shut off.
b.
Disengage main power supply. The operator must follow all lockout/
tagout procedures.
c.
Remove or open any access cover panel and set aside to gain access to
the make-up solenoid valve.
d.
The solenoid valve can be disassemble by removing the 4 retaining
screws.
e.
Keeping all electrical connections intact, lift the coil and top solenoid
base assembly and set aside.
f.
Note the arrangement of the core spring and core assembly,
diaphragm spring and diaphragm assembly. (See diagram.)
g.
Clean all components as required.
Typical water make-up
solenoid valve
Figure 5.4B
Typical water make-
up level switch
Figure 5.4A
Summary of Contents for CF Series
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