IOM 1242-2 • PATHFINDER
®
MODEL AWV CHILLERS
26 www.DaikinApplied.com
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Table 4: Fitting Losses Equivalent Feet of Pipe
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:
1. The 110V liquid line solenoid valves (LSV) have to
be wired back to the outdoor unit. All the conduit and
wiring is to be field supplied (14 gauge, red and white
wires, 3/8” conduit with straight and 90 degree fittings).
If additional length is required, use 14 gauge wire up to
a maximum of an additional 100 feet. A din connector
is supplied with refrigerant specialties kits. Field to wire
directly into compressor terminal box terminal block:
•
Compressor #1
: (LSV-1) wire 740-1A (red) wires
into compressor #1 terminal box terminal block at
TB1-2-9. Wire 740-1B (white) wires to TB1-2-10.
•
Compressor #2
: (LSV-2) wire 740-2A (red) wires
into compressor #2 terminal box terminal block at
TB2-2-9. Wire 740-2B (white) wires to TB2-2-10.
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.
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.
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.
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. Beyond that, a junction box must be
located within 30 feet of the evaporator, and up to 170
additional feet of 14GA wire connected from the cable
to the unit, allowing up to a total distance of 100 feet.
When splicing is required, the connections must be
soldered together and individually shrink-wrapped to be
made water resistant. The expansion valve wiring cannot
run in conduit with other wiring that is over 24 Volts
AC. Shielding must cover the wiring from the unit to the
electronic expansion valve (EXV), including the splice
connection. NOTE: 14 AWG Wire Gauge sizes will use
Beldon part number 83754 or equivalent for a distance
up to 250 feet. For distances greater than 250 feet, 12
AWG wire is recommended (Beldon part number 83804
or equivalent).
6.
A flow switch must be installed in the leaving chilled
water line per manufacturer’s instructions and wired to
terminals 8 and 23 on terminal block M5 in the chiller
control panel. See Unit Field Wiring Diagrams -
Figure 27
and
Figure 28.
7. Do not reduce the wire lengths of factory wiring.
Piping Layout
Figure 33
shows the piping layout for one of the two refrigerant
circuits for AWV units with a remote evaporator without the
optional economizer circuit. The outdoor unit, the evaporator,
and a kit of refrigerant components are shipped as separate
pieces for field mounting, wiring, and piping. The suction
shutoff valve is standard on remote evaporator units.
Note:
Field insulation of the suction lines and the liquid line on
circuits with economizers is required. The outdoor unit will have
a refrigerant charge equal to that of a packaged unit pumped
down into the condenser. Any additional charge of refrigerant
and oil required by the field piping is supplied by the customer.
The location and size of the refrigerant connections are shown
on dimensional drawings available from a Daikin Applied sales
representative.
Figure 32: Remote EXV Field Wiring
Line Size
Inches OD
Angle
Valve
Globe
Valve
90-Degree
Std . Radius
Elbow
90-Degree
Long Radius
Elbow
2 5/8
29.0
69.0
6.0
4.1
3 1/8
35.0
84.0
7.5
5.0
3 5/8
41.0
100.0
9.0
5.9
4 1/8
47.0
120.0
10.0
6.7
5 1/8
58.0
140.0
13.0
8.2
6 1/8
70.0
170.0
16.0
10.0
Summary of Contents for Pathfinder AWV Series
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