Schreiber Chillers Excellon 150AC - Manual (Page 12)

Excellon 235785-01/02
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 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.
5. Make up two chilled water lines, a discharge and a return line. The fitting on the
chiller for these lines is 1" 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. Fill the chilled water tank through the 3/8” globe valves. Fill the tank until it reaches
the level as marked on the water sight glass. The water level should be kept within
1” of the marked level. This unit has a 3/8” NPT overflow nipple. Do not fill the
water tank with deionized water.
7. Check the voltage on the chiller to see that it matches your 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. On a three phase unit, it is
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