Schreiber Chillers 1500ACsf - Manual (Page 11)

level. Do not fill the water reservoir with DEIONIZED WATER. If an automatic
water fill is installed on the unit then the proper water level will be controlled
automatically. Don’t over look the Deionized Water warning. Never use it. It
will damage the chiller.
8. Check the voltage on the chiller to see that it matches your power supply. When
applying power to the water pump (by turning the manual switch on), make sure
all the switches on the control panel are in the "off" position.
9. Power to the unit should be on for 3 hours prior to full usage to allow the crank
case heater to heat the compressor. PLEASE READ SECTION ON CRANK
CASE HEATER ON PAGE 17.
10. This unit has two switches that control the refrigeration; these are numbered "No.
1" and "No. 2". The unit disconnect switch must be in the "on" position. With the
power on you must first check the rotation of the water pump. Remove the access
panels to check this rotation, turn the water pump switch "on" for just enough time
to check water pump rotation. Running the water pump the wrong direction for too
long can back the pump seal off. When this pump is running the correct rotation,
as marked on pump housing, replace the access panel, and now set each
thermostat. In setting the thermostats since this is a two stage system they should
be set so there is no more than 1
0 F between the two controls. For example if you
want to maintain 50 0 F chilled water. You set one thermostat at 50 0 F, and then
set the #2 thermostat at 51 0 F. This will allow some delay in the starting of the two
refrigeration systems.
We suggest that if for some reason the second cycle does not run very often, you
should let the #2 system be the lead system. This should be done every week.
Long idle time is not good for either system.
The water pump manual switch controls the operation of the water pump. After
checking the rotation of the water pump. PLEASE NOTE when the water pump is
turning the proper rotation. The water pump switch must be on in order to check
rotation of fan motor. The refrigeration system will not run unless the water pump
switch is in the on position. Set the temperature controller to desired temperature.
If the temperature is set below freezing, antifreeze should be added through the
overflow pipe. Never add more antifreeze than necessary, since it is a poor
conductor of heat - the cooling capacity of the chiller will be reduced. 11.
With the temperature controller set, the compressor can be turned on by the
manual switch. The refrigeration system is now running. It should be noted that
there could be a two to three degree difference between the temperature control
setting and the dial thermometer. Use the dial thermometer as a guide. Once set,
the temperature controller will control the temperature of the water automatically. 12.
13. This unit is not weatherproof and should not be installed outdoors. Outdoor
installation is possible in some areas of the country. Please check with the factory
for more information.
PLEASE NOTE: THE 1ST AND 2ND STAGES ARE BOTH 7.5 TONS OF REFRIGERATION.
1500AC.doc
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