CVHH-SVX001G-EN
95
X39003892001A
N
No
otte
e:: Graphic labels (shown above) are used for CE
application only.
IIm
mp
po
orrtta
an
ntt::
•
Before servicing, disconnect all power
sources and allow at least 30 minutes
for capacitors to discharge.
•
All electrical enclosures—unit or remote
—are IP2X.
Daily Unit Start-up
1. Verify the chilled water pump and condenser water
pump starter are in ON or AUTO.
2. Verify the cooling tower is in ON or AUTO.
3. Check the oil tank oil level; the level must be visible
in or above the lower sight glass. Also, check the oil
tank temperature; normal oil tank temperature
before start-up is 128°F to 133°F (53.3°C to 56.1°C).
4. Check the chilled water setpoint and readjust it, if
necessary, in the Chiller Settings menu.
5. If necessary, readjust the current limit setpoint in
the Chiller Setpoints menu.
6. Press AUTO.
The control panel also checks compressor motor
winding temperature and a start is initiated after a
minimum restart inhibit time if the winding
temperature is less than 265°F (129.4°C). The chilled
water pump relay is energized and evaporator water
flow is proven. Next, the control panel checks the
leaving evaporator water temperature and compares it
to the chilled water setpoint. If the difference between
these values is less than the start differential setpoint,
cooling is not needed.
If the control panel determines that the difference
between the evaporator leaving water temperature and
chilled water setpoint exceeds the start differential
setpoint, the unit enters the initiate Start Mode and the
oil and refrigerant pump and the condenser water
pump are started. If flow is not initially established
within 4 minutes 15 seconds of the condenser pump
relay energization, an automatically resetting
diagnostic “Condenser Water Flow Overdue” shall be
generated, which terminates the prestart mode and de-
energizes the condenser water pump relay. This
diagnostic is automatically reset if flow is established
at any later time.
N
No
otte
e:: This diagnostic does NOT automatically reset if
Tracer
®
AdaptiView
™
is in control of the
condenser pump through its condenser pump
relay, since it is commanded off at the time of
the diagnostic. It may reset and allow normal
chiller operation if the pump was controlled from
some external source.
If the compressor motor starts and accelerates
successfully, Running appears on the display. If the
purge is set to AUTO, the purge will start running and
will run as long as the chiller is running.
N
No
otte
e:: If a manual reset diagnostic condition is detected
during start-up, unit operation will be locked out
and a manual reset is required before the start-
up sequence can begin again. If the fault
condition has not cleared, the control panel will
not permit restart.
When the cooling requirement is satisfied, the control
panel originates a Shutting down signal. The inlet
guide vanes are driven closed for 50 seconds, the
compressor stops, and the unit enters a 3-minute post-
lube period. The evaporator pump may continue to run
for the amount of time set using Tracer
®
AdaptiView
™
.
After the post-lube cycle is done, the unit returns to
auto mode.
Seasonal Unit Start-up
1. Close all drain valves, and reinstall the drain plugs
in the evaporator and condenser headers.
2. Service the auxiliary equipment according to the
start-up and maintenance instructions provided by
the respective equipment manufacturers.
3. Fill and vent the cooling tower, if used, as well as
the condenser and piping. At this point, all air must
be removed from the system (including each pass).
Then, close the vents in the condenser waterboxes.
4. Open all of the valves in the evaporator chilled
water circuit.
5. If the evaporator was previously drained, fill and
vent the evaporator and chilled water circuit. After
Summary of Contents for CVHH CenTraVac
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