Installation, Operation and Maintenance 6 - 1
8QLW6WDUWXS
Daily Unit Start-Up
NOTE: Unless the UCP2 and building automation
system are controlling the chilled water pump, the
manual unit start sequence is as follows. Operator
actions are noted.
1 Observe the red LED beside the CLD to verify that
all UCP2-controlled outputs (slide valve control,
electronic expansion valve, fill and drain solenoid,
and master oil solenoid) are all under automatic
control. The light should be
off
.
If the red LED is
on
(constantly), it indicates that
some outputs are in a manual override state and
this may prevent the chiller from starting or run-
ning normally. press the <Service Tests> key on
the CLD, enter the appropriate password as nec-
essary and advance through the menu to set the
outputs to automatic.
If the red LED is
flashing
, this means that a diag-
nostic is present requiring a manual reset. (See
the Diagnostics section 10 for more information.)
2 Verify that all menu items in the UCP2 are set to
the desired parameters. Review settings, if
desired, by checking the operator and service
settings (Press the <Operator Settings> or
<Service Settings> key on CLD.)
NOTE: Manual start will require that the External
Auto Stop input to the UCP2 from any generic
building automation system be closed. If control is
from Tracer, have the Tracer send a start signal
(SeeTracer Operation Manual.)
3 Turn power to the chiller on.
Once power is applied, two machine actions will
occur. All modules will go through a power-up reset
phase lasting about 20 seconds. Secondly, a restart
inhibit timer will begin and last up to five minutes.
This protects the compressor motor from damage in
the event of successive start sequences that are
aborted. The reset display that appears is:
The following status screens will be displayed and
require no operator action:
At the end of the power up sequence, the UCP2 will
energize the slide valve unload solenoid for a
minimum of 60 seconds, drive the EXV fully open,
and energize the compressor oil heater.
4 Press the <Auto> key on the CLD.
The unit will proceed to the next machine action
series unless the UCP2 detects that the unit was last
in stop or the unit is currently inhibited by a remote
source. If that occurs, one of two screens will be
displayed.
or
where <type> is External or Tracer.
Once the remote inhibit is cleared or the chiller mode
is set to Auto, the start sequence continues and the
chilled water pump relay is energized. The UCP2 will
confirm chilled water flow or time out if no flow is
detected.
Self Test in Progress
<Software PN> Local Configuration
Copyright American Standard Inc. 1996
<Software PN> Local Configuration
Updating Unit Data, Please Wait
Local Stop: Cannot be Overridden By
Any External or Remote Device
Remote Run Inhibit
From <type> Source
To Next Page
Loading...
Need help?
General
