Schreiber Chillers 1500ACsf User Manual

Page 10

INSTALLATION INSTRUCTIONS

Air or Water Cooled Chillers

When the chiller is received, check for any shipping damage. If any is found,
freight claim should be filed at once with the carrier.

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.

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" from any obstruction. For a water-cooled unit, make sure it has a
good water supply by keeping the piping to the condenser 1" in size.
Restrictions 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 reverse the inlet and the outlet line to the
condenser.

Make sure the ceiling above the fan discharge is over 12 feet to avoid
recirculation of the condenser air, because recirculating 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
recirculating over the condenser.

The supply water lines must be kept at full size on water-cooled condenser units.
These units have 1" N.P.T. inlet and outlet. The unit requires 3 GPM per ton of
refrigeration or 45 GPM. A common condenser supply line can be used, but the
condenser outlet water cannot be a common water line because of the possibility
of one system being "off" and the other unit running causing a feed back of
condenser water.

Make up two chilled water lines; the discharge and return line are 2" N.P.T.
female coupling. IT SHOULD BE NOTED THAT THERE IS A 1/4" COPPER BY-
PASS LINE BETWEEN THE WATER PUMP AND THE WATER RESERVOIR.
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.

Fill the water reservoir through the reservoir fill until it reaches the level as marked
on the water sight glass. The water level should be kept within ½" of the marked

1500AC.doc