SLD/DLD/PLD AIR COOLED CONDENSING UNITS
3
All equipment should be carefully checked
for damage as soon as it is received. If any
damage is evident, a notation must be made
on the delivery receipt before it is signed
and claim should then be filed against the
freight carrier.
B) CHECK VOLTAGE
Carefully check nameplate voltage and
current characteristics to be sure unit is
compatible with power supply.
C) HANDLING
Never hoist the unit from any point
excepting the base lifting holes provided for
this purpose.
Lift with spreader and hooks as shown in
Figure 1. When moving unit by forklift, lift
from compressor end ONLY. Do not lift
from condenser end.
D) LEVELING AND BOLT DOWN
PROCEDURE
A solid level foundation should be provided
for the unit large enough to accommodate
the full length of the base rails. If the
mounting location is not sturdy and perfectly
level, place shims under low points before
tightening down with hold-down bolts.
Improper bolting-down procedure can
seriously warp the framework, particularly
with the large condenser fan units (3 fans or
more).
E) UNIT LOCATION
Large air-cooled condensing units dissipate
a tremendous amount of heat and require
large volumes of air. Short-circuiting of the
condenser air, or restricting the free entry of
air into the coil will result in reduced
capacity and highpower consumption. Take
care to reduce such negative operation
effects by providing for unrestricted free air
flow into and from the unit. At most, the
unit should not be positioned so as to have
no more than one of its sides positioned
close to a vertical building side or wall. At
that point, this should be a minimum of 3’
unit-to-wall free air clearance distance.
F) LOSS OF GAS HOLDING CHARGE
Each Condensing unit is evacuated to
remove moisture, leak tested, and then
shipped with a gas holding charge. Absence
of this charge may indicate a leak has
developed in transit. The system should not
be charged with refrigerant until it is
verified that there is no leak or the source of
the leak is located.
G) CHECK COMPRESSOR
The compressor is bolted to the base of the
condensing unit using solid mounting
techniques.
Check the compressor mounting bolts.
Tighten these bolts as much as possible to
prevent excess vibration. Check electrical
junction connections of the compressor;
tighten only those that may have come loose
during transit.
II. PIPING
1) REFRIGERATION PIPING
Use ACR grade copper tubing, or conform
otherwise to local and national codes.
Piping methods must meet these codes and
result in acceptable piping practice.
A) SUCTION LINE
Design and sizing of the suction line is
critical to maintain:
1) Proper refrigerant velocity
