Technical information

Page: 12
VL Series Portable Chillers, 2 to 40 Tons UGH021/0301
B. Air flow is generated by the motor
driven fans (figure 2.4A) or
centrifugal blowers (figure 2.4B). Air
flow is from the outside of the
chiller, through the condenser and
exhausted through the top of the
unit. On centrifugal blowers models,
exhaust air can be ducted outside of
the plant’s interior environment.
Special duct work is required and a
HVAC contractor should be
consulted for sizing and material
specifications. Exhaust air can not be
ducted on motor driven fan models.
C. A free air space of at least two (2)
feet is required at the condenser
intake and six (6) feet at the
condenser discharge to allow for
proper air flow.
D. At full load, the chiller will discharge
approximately 15,000 BTU’s per
hour per ton of cooling.
E. On blower units, air discharge
duct work should be sized by
a qualified HVAC engineer.
Sizing shall be according to
rated VLM at the static
pressure of .90 inches of
water. See figure 2.4C at right.
F. On blower units, a damper
control assembly is required in
low ambient
temperature areas or
when outdoor air
make-up is used. The
assembly works in
conjunction with
refrigerant head
pressure to regulate
air flow to maintain
proper refrigerant
head pressure when
condenser intake air
temperature will be
less than 60°F. See
figure 2.4D to the
right.
Damper assembly
Punch hole
in top panel
1/4" Copper line
Liquid receiver
(located inside
chiller on base)
Angle valve and cap
1/4" copper line connection
Figure 2.4C
Figure 2.4D
Figure 2.4A
Typical fan assembly
Figure 2.4B
Typical blower assembly
MODEL CFM
VLA-15 15,000
VLA-20 20,000
VLA-25 25,000
VLA-30 30,000
CFM RATINGS