Schreiber Chillers 1000ACsf - Manual (Page 11)

8. Set the temperature controllers to the desired temperature. If you want to stage
each refrigeration system set at 2 0 temperature difference between the two
temperature controllers. For example, if you want 48 0 F chilled water then set the
No. 1 thermostat at 48 0 F, and the No. 2 thermostat at 50 0 F. If the 1st stage cannot
maintain 48 0 F then the 2nd stage would start when the water temperature reaches
50 0 F. If the temperature is set below 38 0 F, antifreeze must be added. Never add
more antifreeze than necessary, because it is a poor conductor of heat.
9. 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 or 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.
Only on manual control units. Not the solid state controller.
10. 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. Solid state controllers will need outdoor protection. Call our
service separtment if help is needed.
INSTRUCTION FOR TEMPERATURE CONTROL
Manual Controls System Only
Please note the dial thermometer and thermostat are both an indicator of the chilled
water temperature. You will not necessary find the both to read the same temperature.
They are installed in a copper weld at the bottom of the chilled reservoir. We consider
the thermostat as the true chilled water temperature. This is the controller for cycling the
refrigeration system off and on. This does not apply to units with solid state controller.
NOTE: You can adjust the dial thermometer if you find it necessary. You do this by
removing the lens. The lens is removable by prying gently on the lens. Then with the
lens out you hold the pointer with one hand and turn the center knob. You then turn the
center pointer counter clockwise to lower and clockwise to raise the temperature. You
need not turn this knob too far. A slight turn will change its temperature enough. Only on
manual controls.
The dial thermometer should be set at the time the thermostat is cycling unit off. If you
do not care to make this change, it is important you let those operating the processing
equipment be aware that there will be a difference between the thermostat and the dial
thermometer. We recommend you note any difference between the thermostat and the
dial thermometer. See solid state controller for proper setting.
If you need help please call.
1000ac.doc
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