Specifications

21
FORM 160.80-NOM1
YORK INTERNATIONAL
The adjusting bolts should now be rotated one (1) turn
at a time, in sequence, until the unit end sheets are about
7/8 inch (22mm) off the floor or foundation, and the unit
is level. Check the level of the unit both longitudinally
and transversely. If the adjusting bolts are not long enough
to level the unit due to an uneven or sloping floor or
foundation, steel shims (grouted, if necessary) must be
added beneath the isolator assemblies as necessary.
After the unit is leveled, wedge and shim under each
corner to solidly support the unit in this position while
piping connections are being made, pipe hangers ad-
justed and connections checked for alignment. Then the
unit can be filled with water and checked for leaks. The
adjusting bolts should now be finally adjusted and the
wedges and shims can be removed. The unit should
now be in correct level position, clear of the floor or
foundation and without any effect from the weight of
the piping. When the unit is properly supported, spring
isolator deflection should be approximately 1" (25 mm).
PIPING CONNECTIONS
After the unit is leveled (and wedged in place for optional
spring isolators) the piping connections may be fabricated;
chilled water, condenser water and refrigerant relief. The
piping should be arranged with offsets for flexibility, and
adequately supported and braced independently of the
unit to avoid strain on the unit and vibration transmission.
Hangers must allow for alignment of pipe. Isolators (by
others) in the piping and hangers are highly desirable, and
may be required by specifications. This is done to effec-
tively utilize the vibration isolation characteristics of the
isolator mounts on the unit.
CHECK FOR PIPING ALIGNMENT
When piping is complete, check for alignment try open-
ing a connection in each line, as close to the unit as
possible, by removing the flange bolts or coupling. If
any of the bolts are bound in their holes, or if the con-
nection springs are out of alignment. The misalignment
must be corrected by properly supporting the piping or
by applying heat to anneal the pipe.
It may be necessary to weld chilled
water or condenser water piping di-
rectly to the water pipe nozzles. Since
chilled and condenser water tempera-
ture sensor wells are often in close
proximity to these connection points,
sensors in the wells may often see tem-
peratures of several hundred degrees.
We have reason to believe that some
potential exists for damaging these sen-
sors from the transferred heat. Any
damage will most likely show up as er-
ror in the sensor.
It is advisable to remove the sensors
from the wells during the welding pro-
cess as a precautionary measure. If the
sensor is removed, assure that it bot-
toms out when it is placed back in the
well.
If the piping is annealed to relieve
stress, the inside of the pipe must be
cleaned of scale before it is finally
bolted in place.
1