Table 7: Elastomeric isolator detail
Model P/N
Isolator color
Weight range, lb
Weight range, kg
YORK P/N
029-25335-001 (434002) Charcoal
Up to 825
Up to 374
029-25335-001
029-25335-002 (434004) Brick red
826–1688
375–766
029-25335-002
029-25335-004 (434005) Charcoal
1689–4000
767–1814
029-25335-004
Note:
•
All dimensions are in inches (mm) in accordance with ANSI Y14.
•
Installation of optional elastomeric isolators
for installation instructions.
•
Isolators are mount molded in weather-resistant Durulene™ compound as standard.
Isolators are also available in other materials such as natural rubber, extreme high
temperature silicone, high-damped silicone, nitrile, and EDPM.
•
AL = mounting hole center to center spacing.
•
HF = free height of mount, before loading. The operating height is calculated by the free
height less the static deflection under load. All dimensions are for reference only.
•
Hardware uses zinc electroplate coating.
Make piping connections
After the unit is leveled, place wedges or shims under each corner to solidly support the unit in
this position while connecting and hanging the piping, adjusting the connections, and checking for
correct alignment.
Compressor refrigerant piping and system external piping are factory installed on all units. On
units where the chiller refrigerant piping must be removed for any reason, the piping must only be
completed under the direct supervision of the Johnson Controls representative.
Evaporator freeze damage
CAUTION
Power must remain on the chiller whenever the ambient temperature drops below 32°F (0°C) with
water in the evaporator to avoid evaporator damage. To avoid damage, ensure that the correct heater
option for 0°F (-17.8°C) minimum ambient or -20°F (-28.9°C) minimum ambient temperature is installed,
based on the lowest expected ambient temperature at the chiller location.
CAUTION
If glycol is installed in the evaporator, the glycol concentration must ensure that the freeze point is
below the lowest expected ambient temperature at the chiller location to avoid evaporator damage.
Evaporator water piping
After the unit is leveled and wedged in place for optional spring isolators, the piping connections
can be made for the chilled water. The piping must be arranged with offsets for flexibility, and
YVAM Air-Cooled Centrifugal Liquid Chiller
24
