Daikin Pathfinder AWV Installation, Operation And Maintenance Manual page 32

Table 5: Fitting Losses Equivalent Feet of Pipe
Line Size In . Angle
OD Valve
2 5/8 29.0
35.0
3 1/8
41.0
3 5/8
4 1/8 47.0
5 1/8 58.0
6 1/8 70.0
6 Steel 70.0
SOURCE: ASHRAE 2014 Handbook Refrigeration
NOTE: TEL values for the filter-drier and solenoid valve are already
included and should not be added to the liquid line drop.
Remote Evaporator Field Wiring Notes:
Installations requiring longer lengths of wire than provided
with the chiller will need to field supply the materials and
make a splice connection. For all field wiring connections, use
watertight boxes at splice locations that may be exposed to
weather. Individual connections must be soldered and shrink
wrapped. An outer shrink wrap is also required and should be
wrapped with electrical tape to make it more water resistant.
Wire should be routed in conduit per national and local codes.
If code allows wiring to be run outside of conduit, the wiring
needs to be suitable for outdoor use in direct sunlight. If
running wiring through plenums, it will also need to be plenum
rated. Additional considerations should be made to:
• keep power and signal wiring separate to avoid induced
voltages or exposure to EMI sources. Never run power
cables and signal wires in same conduit.
• avoid any sharp edges or other sources of potential
physical damage.
• route and secure cables away from hot surfaces, high
voltage lines, and moving components.
• do not reduce the wire lengths of factory wiring, except as
specifically noted in item #5.
Specific Wiring Guidance per Component
1. The 120-V liquid line solenoid valves (LSV) come with a
din connector and have to be wired directly back to the
outdoor unit. Minimum wire gauge to be 14 AWG. Field
to wire:
• Compressor #1: (LSV-1) wire 741-1A (red) wires
into the unit control box terminal block at MQ74.
Wire 741-1B (white) wires to MQ17.
• Compressor #2: (LSV-2) wire 741-2A (red) wires
into the unit control box terminal block at MQ84.
Wire 741-2B (white) wires to MQ17.
2. Two evaporator water temperature sensors with 100
feet of cable coiled up and attached to the unit base
for extension to the evaporator and insertion in fittings
located on the side of the inlet and outlet nozzles. If
additional length of cable is required, the cable needs to
be a 2 conductor, twisted pair, shielded cable, with drain
wire. This wire within this cable needs to be a minimum
of 22 AWG gauge wire for both conductors. Preferably
the conductors are colored white and black but not
IOM 1242-8 • PATHFINDER
Installation and Application Considerations - Remote Evaporators
90-Degree 90-Degree
Globe
Std . Radius Long Radius
Valve
Elbow Elbow
69.0 6.0 4.1
84.0 7.5 5.0
100.0 9.0 5.9
120.0 10.0 6.7
140.0 13.0 8.2
170.0 16.0 10.0
170.0 16.0 10.0
MODEL AWV CHILLERS
®
necessary provided notation is made on schematic to
aid field servicing of equipment. When sourcing cable,
consideration should be made towards Alpha Wire H1
p/n 5481C or equivalent as suitable.
3. One suction line refrigerant temperature sensor per
circuit with 100 feet of cable coiled up and attached to
the unit base for extension to the evaporator. If additional
length of cable is required, the cable needs to be a 2
conductor, twisted pair, shielded cable, with drain wire.
This wire within this cable needs to be a minimum of
22 AWG gauge wire for both conductors and drain
wire. Preferably the conductors are colored white and
black but not necessary provided notation is made on
schematic to aid field servicing of equipment. When
sourcing cable, consideration should be made towards
Alpha Wire H1 p/n 5481C or equivalent as suitable.
4. One suction line pressure transducer per circuit with
100 feet of cable coiled up and attached to the unit base
for extension to the evaporator. If additional length of
cable is required, the cable needs a 3 conductor, twisted
triad, shielded cable, with drain wire. This cable needs
a minimum of 22 AWG gauge wire for both conductors.
Preferably the conductors are colored red, white, and
black but not necessary provided notation is made on
schematic to aid field servicing of equipment. When
sourcing cable, consideration should be made towards
Belden 9363 or equivalent as suitable.
Figure 53: Remote EXV Field Wiring
5. The electronic expansion valve has a 30 foot long cable
attached and can be used when the outdoor unit is less
than 30 feet away. For lengths greater than 30 feet but
no more than 200 feet, cut the factory supplied 22 AWG
cable/wire as close to the M12 connector (connects to
the EXV Stepper Motor) as possible to make a splice.
The extension cable needs a 4 conductor, shielded
cable, with drain wire and a minimum of 14 AWG to total
distances up to 200 ft. Preferably the conductors are
32 www.DaikinApplied.com