AAON LN-140 - Manual (Page 22)

22
Water Connection
Connect the supply and return water lines.
The connection size is listed on the unit
rating sheet, along with the designed
volumetric flow rate. The maximum
operating pressure for AAON LN Series
units is 125 psi.
Mounting Isolation
For roof mounted applications or anytime
vibration transmission is a factor, vibration
isolators may be used.
Access Doors
Lockable access door is provided to the
compressor and control compartment. A separate access door is also provided to the
pumping package compartment.
A light switch with service lights is provided
on the wall of the compressor and control
compartment.
End Flashing Installation
On all LN Series units the cabinet width will
overhang the shipping trailer on each side.
In order to secure and protect the unit during
transit the sheet metal end flashings have
been removed from the unit. The slot created
at the base of each end of the unit allows the
unit to set firmly on the trailer deck.
Sheet metal flashings are shipped loose with
the unit and once the unit is set into place
the flashings must be installed on each end
of the unit to complete the finished seal at
the base. The flashings are unit specific and
designed to cover the slot at each end of the
unit to prevent water run-off into the curb.
Failure to attach and seal the end of unit
with the flashings may result in water
leakage into the curb.
Figure 6 - Factory Supplied End Flashings
PVC (Polyvinyl Chloride) and CPVC
(Chlorinated Polyvinyl Chloride) are
vulnerable to attack by certain
chemicals. Polyolester (POE) oils
used
with R-410A and other
refrigerants, even in trace amounts,
in a PVC or CPVC piping system will
result in stress cracking of the piping
and fittings and complete piping
system failure.
CAUTION
The chiller must be operated only
with liquid flowing through the
evaporators.
WARNING
In order to prevent water leakage into
the roof curb, the factory provided
sheet metal flashings MUST BE
attached to the unit base to cover the
shipping slots at both ends of the
unit.
CAUTION
Installing Contractor is responsible
for proper sealing of the water piping
entries into the unit Failure to seal the
entries may result in damage to the
unit and property.
CAUTION