Specifications

51
FORM 160.80-NOM1
YORK INTERNATIONAL
condenser fluids other than water consult with the local
YORK Field Service Office for the correct condenser
approach.
CONDENSER WATER SIDE TUBE
CLEANING PROCEDURE
Two methods are used for waterside tube cleaning to
remove the scale; chemical and mechanical cleaning
procedures. The composition of the scale will deter-
mine which method will be most effective to remove
the scale and dirt.
Consult with the local YORK Field Service Office for a
recommendation of the method(s) used in the local area.
Chemical Cleaning Procedure
Chemical cleaning is an effective method to remove
scale from internally enhanced copper tubes. However,
a company knowledgeable with the chemical cleaning
procedure should be contracted or consulted. Follow
the chemical cleaning company recommendations con-
cerning solution cleaning strength and time duration of
the cleaning process.
Serious damage to the condenser
tubes will result if the chemical clean-
ing procedure is improperly applied.
Mechanical tube cleaning must al-
ways follow a chemical cleaning pro-
cedure.
When chemical cleaning of the condenser tubes is re-
quired, it may be necessary to calculate the internal vol-
ume of the waterside condenser tubes. This informa-
tion is necessary to properly mix the correct concentra-
tion of cleaning solution.
Standard materials of construction for YORK YS Chiller
condensers is copper tubes and mild carbon steel water
boxes.
The internal volume (waterside) of the condenser can
be calculated as follows:
Volume (in
3
) = N * L * 0.30680 in
3
/in
Where: N = Number of Condenser Tubes
L = Length of each Tube in inches
To covert in
3
to gallons, divide the Volume (in
3
) by
231 in
3
/gallon.
Mechanical Cleaning Procedure
1. Drain the water from the condenser.
2. Remove the water boxes from both ends of the
condenser. Use proper lifting equipment when re-
moving the water boxes. Use caution not to dam-
age the threads on the mounting studs that are
welded to the tube sheet.
3. Select a tube cleaning brush for 5/8 inch I.D cop-
per condenser tubes. If tubes other than 5/8 inch
copper are used, select a tube cleaning brush that
is made for the tube size. Generally, brushes made
of hard plastic or brass bristled wires are preferred
for cleaning copper tubes.
4. Attach the tube cleaning brush to the end of a clean-
ing machine or cleaning rod.
5. Flush the condenser with clean water to remove
the debris.
6. Replace the water box gasket with a new gasket
and reassemble the water boxes onto the condenser.
EVAPORATOR TUBES
The standard evaporator tubes used in YORK YS Chill-
ers are internally enhanced copper tubes.
If the equipment is located in an un-
heated area that is susceptible to freez-
ing, the water must be drained from
the evaporator to prevent tube dam-
age from freezing.
Maintain evaporator water or brine flow rates through
the evaporator tubes that the chiller was designed for.
Refer to the engineering data on the sales order form
for the correct flow rates.
Generally, the water or brine that is circulated through
the evaporator is part of closed loop circuit that is treated
with chemicals to prevent the formation of scale and
debris.
If cleaning of the evaporator tubes is required, follow
the condenser cleaning procedure.
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