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Installation
Electrical Connections
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized. Verify that
no power is present with a voltmeter.
Electrical wiring for the EarthWise™ purge unit requires
that four power connections be made to the chiller control
system; two connections for power from the chiller control
panel and one from the chiller RUN signal.
Electrical requirements are:
•
115 Vac, 60 Hz, 1-Phase, 10.3 Amps.
•
110 Vac, 50 Hz, 1-Phase, 10.3 Amps.
Note: Voltage range is +10%, -15%
Note: Use Class 1, 14 AWG copper wire and metal
conduit. All field-installed wiring must comply with
applicable NEC and local electrical codes.
Important:
Do not run Purge AC power supply circuit in
same conduit with any low-voltage (<30
Volt) wiring.
Power Wiring
The 115 Vac main hot line should be connected to the fused
purge output or to a similar connection point in the chiller
control panel that previously provided power for the
original purge unit. See
Figure 8
Use the 7/8" (22 mm) diameter hole on the back side of
purge control panel for 115 Vac power access. Power
supply terminations must be field connected to terminals
3X1-2 (Hot) and 3X1-7 (Neutral) in purge control panel.
Chiller RUN Signal
A 115 Vac chiller run signal must be supplied to 3A6, J2-2
whenever the chiller is running. The Dual High Voltage
Input LLID looks for a 115 Vac potential difference across
J2-2 and J2-1 to indicate the chiller is on. This signal may
be sourced from 3X1-4 and switched using a field-supplied
relay, or this signal may come from the hour meter, start
counter, or similar device that can provide 115 Vac
whenever the chiller is on.
If the Chiller RUN Signal is sourced from 3X1-4, a field-
supplied, normally open relay (5K91) will be required. The
contacts must be wired between 3X1-4 to 3A6, J2-2. The
relay coil must be energized from the chiller control panel
by wiring it in parallel with the hour meter, start counter, or
other similar device that is only energized when the chiller
is operating. The common terminal (3A6-J1) should be
returned to the purge neutral (3X1-8).
12
and
Figure
9.
Alternatively, a Chiller RUN Signal may be provided to
3A6, J2-2 with a 115 Vac source directly from the hour
meter, start counter, or other device that is powered only
when the chiller is on. The common terminal (3A6, J2-2)
should be returned to the purge neutral, 3X1-8. See
Figure
8.
Remote Human Interface
Guide the DynaView Cable (Item #7 of
the control panel, Human Interface Bracket, and Bushing
(Items #4 and 6 of
Figure
Connector (Item #13 of
Figure
Connector as shown in
Figure
If the retrofit human interface is remotely mounted from
the purge, factory wiring must be replaced. Maximum
wire length is 25 feet (7.6 m).This is not provided on chillers
that have CH530 or AdaptiView controls.
The purge based human interface is not provided on
chillers with CH530 style controls. For these systems, the
CenTraVac controls provide the interface duties.
Figure
3) through
3) before connecting the Cable
3). Connect the Cable
7.
PRGF-SVN001B-EN
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