Conair MPA - Manual (Page 74)

microKool Portable Chillers UGH004/0999
6-18
T ROUBLESHOOTING
The freezestat unit is a bulb and capillary thermostat. To
replace the unit:
Shut down the chiller and disconnect the
process fluid lines.
Disconnect and lockout the power supply.
Drain the tank
of all fluid
through
the drain valve in the
base of the tank.
Locate the
freezestat bulb.
The bulb sensor is
located on the
process piping just
after the evaporator.
Remove the insulation around the bulb.
Detach the bulb from the process line.
Open the chiller electrical enclosure and locate
the freezestat unit.
Disconnect freezestat unit wires from their ter-
minals.
Mark the wires so that you can easily reconnect
the new unit to the appropriate terminals..
Loosen the screws holding the freezestat unit to
the electrical panel.
Remove the entire freezestat unit.
Threat the bulb and capillary through the raceway.
Reverse the process to install the new unit. Be
sure to insert the bulb sensor completely into the process
piping well and replace the insulation around the bulb.
R
EPLACING THE
F
REEZESTAT
1
2
3
4
5
WARNING: Electrical shock hazard
Before attempting maintenance of any kind,
stop the unit and disconnect and lock out the
main power supply.
6
7
8
9
Drain valve
Evaporator
10
11