Daikin Navigator WWV Installation, Operation And Maintenance Manual page 12

code requirements and ANSI/ASHRAE Standard 15 code
recommendations must be followed.
In order to ensure proper installation, it is important to know
how the three-way relief valve functions. One valve remains
active at all times and the second valve acts as a standby.
When the stem of the three-way valve is turned into the valve
completely, the valve is in "Front Seated Position" and all
refrigerant will flow through the back outlet port, as shown
in Figure 7. When the stem of the three-way valve is turned
back completely, the valve is in "Back Seated Position" and all
refrigerant will flow through the front outlet port as shown in
Figure 8.
Figure 6: Three-Way Relief Valve
Figure 7: Three-Way Valve, Front Seated Position
Figure 8: Three-Way Valve, Back Seated Position
When the valve stem is not turned forward or turned back
completely, the valve is in "Mid Position," as shown in
IOM 1264-1 • NAVIGATOR
®
Figure 9.
MODEL WWV CHILLERS
I
nsTallaTIon and
Do not operate the system with the three-way valve stem in
the Mid Position.
Figure 9: Three-Way Valve, Mid Position
Electrical Connections
Power wiring connections to the chiller may be done with
either copper or aluminum wiring. Copper wire should be sized
and installed per the required version of NEC and/or local
codes. Aluminum wire shall be installed in accordance with
the required version of NECA/AA 104, Standard for Installing
Aluminum Building Wire and Cable (ANSI). All wiring within the
unit is sized in accordance with the U.S.A. National Electrical
Code. Refer to the unit nameplate and the unit selection report
for the correct electrical ratings.
Qualified, licensed electricians must perform wiring. Electrical
shock hazard exists that can cause severe injury or death.
The field power wiring required varies depending on unit
model. See page 14 for wiring information. These wiring
diagrams are also provided with the chiller.
NOTE: Wiring, fuse, and wire size must be in accordance
with the National Electric Code (NEC). The voltage to
these units must be within ±10% of nameplate voltage
(415V units must have voltage within -13% and +6%
of nameplate voltage) and the voltage unbalance
between phases must not exceed 2%. Since a 2%
voltage unbalance will cause a current unbalance
of 6 to 10 times the voltage unbalance per the
NEMA MG-1 Standard, it is most important that the
unbalance between phases be kept at a minimum.
Do not use power factor correction capacitors with WWV
chillers. Doing so can cause harmful electrical resonance in
the system. Correction capacitors are not necessary since
VFDs inherently maintain high power factors.
Control panels are rated for the amount of current that can
be passed through it and still contain the damage within the
enclosure; this value is known as the short circuit panel rating
as shown in Table 5 and is standard on all WWV models.
12
a C
pplICaTIon onsIderaTIons
CAUTION
DANGER
CAUTION
www.DaikinApplied.com