Daikin Pathfinder AWV Installation, Operation And Maintenance Manual page 17

Figure 36: Case 5 for AWV020-024 - IWSE Option
Full Load % Capacity Reduction/Power Increase (AWV020-024)
13.0
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0 8 10
Depth of Pit / Wall Height (ft)
Dist = 8 ft Capacity
Dist = 8 ft Power
Figure 37: Case 5 for AWV026-030 - IWSE Option
Full Load % Capacity Reduction/Power Increase (AWV026-030)
13.0
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0 8 10
Depth of Pit / Wall Height (ft)
Dist = 8 ft Capacity
Dist = 8 ft Power
www.DaikinApplied.com
12 13
Dist = 10 ft Capacity Dist = 12 ft Capacity
Dist = 10 ft Power Dist = 12 ft Power
12 13
Dist = 10 ft Capacity Dist = 12 ft Capacity
Dist = 10 ft Power Dist = 12 ft Power
Installation and Application Considerations
Chilled Water Piping
Startup procedures should confirm that the chilled water piping
system had been properly flushed out before being connected
to the chiller vessel.
All evaporators have OGS-type grooved water connections
(adhering to Standard AWWA C606) or optional flange
connections. The installing contractor must provide matching
mechanical connections. Be sure water inlet and outlet
connections match certified drawings and nozzle markings.
PVC and CPVC piping should not be used.
Polyolester Oil, commonly known as POE oil is a synthetic
oil used in many refrigeration systems, and is present in this
Daikin product. POE oil, if ever in contact with PVC/CPVC, will
coat the inside wall of PVC/CPVC pipe causing environmental
stress fractures. Although there is no PVC/CPVC piping in
this product, please keep this in mind when selecting piping
14
materials for your application, as system failure and property
damage could result. Refer to the pipe manufacturer's
recommendations to determine suitable applications of the
pipe.
To prevent damage to the evaporator and potential chiller
failure, a supply strainer is required in the inlet water piping
which connects to the evaporator. This strainer must be
installed prior to operation of the chilled liquid pumps.
Field installed water piping to the chiller must include:
• A cleanable strainer installed at the water inlet to the
evaporator or IWSE connection to remove debris and
impurities before they reach the evaporator. Install
cleanable strainer within 5 feet (1500 mm) of pipe length
from the evaporator inlet connection and downstream of
any welded connections (no welded connections between
strainer and evaporator). AWV models require a strainer
as specified in Inlet Strainer Guidelines on
• A water flow switch must be installed in the horizontal
piping of the supply (evaporator outlet) water line to avoid
evaporator freeze-up under low or no flow conditions.
14 See page 20 for more information.
• Purge air from the water system before unit startup to
provide adequate flow through the evaporator.
• Piping for units with brazed plate evaporators must have
a drain and vent connection provided in the bottom of
the lower connection pipe and to the top of the upper
connection pipe, respectively, see
evaporators do not have drain or vent connections due to
their construction.
• Adequate piping support, independent from the unit,
to eliminate weight and strain on the fittings and
connections.
17 IOM 1242-8 • PATHFINDER
WARNING
CAUTION
page
Figure 39. These
MODEL AWV CHILLERS
®
18.