FORM 160.55-O1 (920)
153
YORK INTERNATIONAL
COOLER AND CONDENSER
The major portion of maintenance on the condenser and
cooler will deal with the maintaining of the water side
of the condenser and cooler in a clean condition.
The use of untreated water in cooling towers, closed
water systems, etc. frequently results in one or more of
the following:
1. Scale Formation
2. Corrosion or Rusting
3. Slime and Algae Formation
It is therefore to the benefit of the user to provide for
proper water treatment to provide for a longer and more
economical life of the equipment. The following rec-
ommendation should be followed in determining the
condition of the water side of the condenser and cooler
tubes.
1. The condenser tubes should be cleaned annually or
earlier if conditions warrant. If the temperature dif-
ference between the water off the condenser and the
condenser liquid temperature is more than 4° greater
than the difference recorded on a new unit it is a good
indication that the condenser tubes require cleaning.
They should be cleaned as instructed on page 143 of
this manual.
2. The cooler tubes under normal circumstances will
not require cleaning. If however the temperature
difference between the refrigerant and the chilled
water increases slowly over the operating season, it
is an indication that the cooler tubes may be fouling
or that there may be a water by-pass in the water box
requiring gasket replacement.
PURGE UNIT
Every Three Months
1. Change the purge unit dehydrator.
a. If the unit is operating;
1) When the purge unit is in the drain cycle,
close the valve in the high pressure oil sup-
ply line and allow the unit to complete the
drain cycle.
2) Close condenser gas and oil return valves and
replace the dehydrator.
3) Open all valves to return the purge unit to
normal operation.
Annually
1. Clean and inspect all valves which are part of the
purge unit system.
2. Drain and flush the oil and refrigerant from the purge
unit shell.
a. Before flushing remove the float assembly from
the purge unit shell.
b. Disconnect the oil line from he bottom of the
purge unit shell.
c. To clean - flush refrigerant from the top of the
purge unit shell and let the refrigerant drain from
the bottom through the oil line connection.
d. After a complete flushing, replace the float as
-
sembly and the oil drain line.
3. Clean the following orifice.
a. One (1) orifice in the liquid line feed to the cool
-
ing coil.
b. Purge unit exhaust orifice.
4. Inspect the foul gas inlet check valve.
OIL RETURN SYSTEM
1. Change the dehydrator in the oil return system semi-
annually or earlier if the oil return system fails to
operate.
2. When the dehydrator is changed the nozzle of the
eductor should be checked for any foreign particles
that may be obstructing the jet.
ELECTRICAL CONTROLS
1. All electrical controls should be inspected for ob-
vious malfunctions.
2. It is important that the factory settings of controls
(operation and safety) not be changed. If the settings
are changed without YORK’s approval the warranty
will be jeopardized.
3. A 5-11 year life battery is part of the RTC-Real Time
Clock. To replace refer to Section 2.
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