Schreiber Chillers 750ACsf - Manual (Page 11)

INSTALLATION INSTRUCTION
Air or Water Cooled Chillers
1. When the chiller is received, check for any shipping damage. If any is found, a
freight claim should be filed at once with the carrier.
2. This water chiller is designed with a contaminant free chilled water system,
stainless steel reservoir, and all copper evaporator. Installed properly, it will give
you years of trouble free service. Therefore, it is important that the chilled water
piping system you are using to plumb this water chiller is also as contaminant free
as possible. When you take this into consideration you will have a most efficient
water cooling system
Should you need assistance to clean up an old chilled water system or to keep a
new system clean, we suggest you contact your local water treatment company.
3. Place the water chiller in an area that allows easy access to the service doors and
control panel for routine maintenance and inspection. For the air-cooled unit, make
sure it is in an area where there is good air circulation over the condenser inlet, 24
inches from any obstruction. For the water-cooled unit, make sure it has a good
water supply by keeping the piping to the condenser 1" in size. Restriction of air to
the air-cooled condenser or water to the water-cooled unit will not only affect the
efficiency of the unit, but will also cause damage to the refrigeration system. Note:
Do not mix up the inlet and the outlet to the condenser.
4. Make sure the ceiling above the fan discharge is over 12 feet to avoid re-circulation
of the condenser air, because re-circulating condensed air can cause the unit to cut
off on the high-pressure switch. If the ceiling is lower than 12 feet, a straight duct
out of the ceiling should be installed in order to prevent the air from re-circulating
over the condenser.
5. Make up two chilled water lines, a discharge and a return line. The fitting on the
chiller for these lines is 1 ½" pipe coupling. IT SHOULD BE NOTED THAT THERE
IS A 1/4" COPPER BY-PASS LINE BETWEEN THE WATER PUMP AND THE
WATER TANK. This by-pass allows just enough water to circulate through the
water system in order to prevent damage to the water pump in case the chilled
water discharge is shut off. This small amount of water will not affect the efficiency
of the unit.
6. It is necessary to check the rotation of the water pump. Before applying power to
the water pump using the manual switch, make sure the compressor switch is
turned off. To test the water pump rotation turn the pump switch on and off quickly.
The pump impeller should rotate in the direction of the arrow located on the pump.
NOTE: The water pump must be on in order for the refrigeration system to run.
Unless some on installing the unit changes the wiring to fan & water pump. If you
correct one, both should be running the correct rotation.