York YT ユーザーズマニュアル

FORM 160.55-O1 (604)

YORK INTERNATIONAL

The major por tion of maintenance on the condenser and 
cooler will deal with the maintaining of the water side 
of the con dens er and cooler in a clean condition. 

The use of un treat ed water in cool ing tow ers, closed 
water systems, etc. frequently re sults in one or more of 
the following: 
 1. Scale Formation 
 2. Corrosion or Rusting 
 3. Slime and Algae Formation 

It is there fore to the beneÞ t of the user to provide for 
proper water treatment to provide for a longer and more 
economical life of the equipment. The following rec-
 om men da tion  should  be  fol lowed  in  de ter min ing  the 
con di tion 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-
 fer ence be tween the water off the con dens er and the 
condenser liquid temperature is more than 4° great er 
than the dif fer ence recorded on a new unit it is a good 
in di ca tion that the condenser tubes re quire clean ing. 
They should be cleaned as instructed on page 143 of 
this manual. 

 2. The cooler tubes under normal cir cum stanc es will 

not require cleaning. If how ev er the temperature 
difference between the re frig er ant and the chilled 
wa ter increases slowly over the op er at ing 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 re place ment.

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 pres sure oil sup-
 ply line and allow the unit to com plete the 
drain cy cle. 

2)   Close con dens er gas and oil return valves and 

re place the dehydrator. 

3)  Open all valves to return the purge unit to 

nor mal  operation. 

1.  Clean and in spect all valves which are part of the 

purge unit sys tem. 

2.  Drain and ß ush the oil and refrigerant from the purge 

unit shell. 
a.  Before ß ushing remove the ß oat  as sem bly  from 

the purge unit shell.

b.  Disconnect the oil line from he bottom of the 

purge unit shell. 

c.  To clean - ß ush refrigerant from the top of the 

purge unit shell and let the re frig er ant drain from 
the bottom through the oil line connection. 

d.   After a complete ß ush ing, replace the ß oat as-

 sem bly and the oil drain line. 

3.   Clean the following or i Þ ce. 

a.   One (1) oriÞ ce in the liq uid line feed to the cool-

 ing  coil. 

b.   Purge unit ex haust oriÞ ce. 

4.   Inspect the foul gas inlet check valve. 

1.   Change the de hy dra tor in the oil re turn system semi-

annually or earlier if the oil re turn system fails to 
operate. 

2.  When the dehydrator is changed the noz zle of the 

eductor should be checked for any for eign particles 
that may be obstructing the jet. 

1.  All electrical controls should be in spect ed for ob-

 vi ous  mal func tions. 

2.  It is im por tant that the fac to ry set tings of controls 

(op er a tion and safety) not be changed. If the set tings 
are changed with out YORK’s ap prov al the war ran ty 
will be jeop ar dized. 

3.   A 5-11 year life bat tery is part of the RTC-Real Time 

Clock. To replace refer to Section 2.