13
OPERATION
COOLING
1.
Select
“ON”
on
the
DIRECT
OPERATION section of the control
panel.
2.
Select “COOLING” on the MODE
SELECT section of the control panel.
Cooling operation will commence after
all self-check functions have completed.
This can take as long as 5 minutes so do
not be alarmed if the unit does not seem
to respond immediately. If the unit is
being switched over from HEATING
mode, there is an enforced 30-minute
delay period before COOLING mode will
engage.
PRECAUTIONS
1.
Ensure that all AUTO-OFF-MANUAL
switches for external pumps and the
cooling tower fan are set in the AUTO
position during normal operation. The
chiller-heater
is
designed
to
automatically control the chilled/hot
water pump, cooling water pump, and
cooling tower fan signals as it
requires.
2.
At the beginning of the cooling
season, clean and refill the cooling
tower with fresh water. Check
strainers for debris and spray nozzles
for proper operation.
3.
During the heating season, the cooling
tower and cooling water circuit should
be drained in order to help prevent
freezing and scaling in the Absorber
and Condenser tubing bundles.
4.
When two or more absorption chiller-
heaters are installed in parallel, set all
units to the same operating mode.
HEATING
1.
Select
“ON”
on
the
DIRECT
OPERATION section of the control
panel.
2.
Select “HEATING” on the MODE
SELECT section of the control panel.
Heating operation will commence after
all self-check functions have completed.
This can take as long as 5 minutes so do
not be alarmed if the unit does not seem
to respond immediately. If the unit is
being switched over from COOLING
mode, there is an enforced 30-minute
delay period before HEATING mode will
engage.
REMOTE CONTROL
In order to respond to BMS signals,
the chiller-heater must be set to remote
operation. Simply press the “REMOTE”
button on the REMOTE OPERATION
section of the control panel. The LED
will illuminate on the “REMOTE” button
to indicate remote operation has been
engaged.
SAFETY CONTROLS
Safety and limit controls monitor
critical operating conditions in the chiller-
heater and may shut down the unit when
abnormal conditions occur. Not all
abnormal conditions are harmful to the
chiller-heater,
therefore,
the
chiller-
heater may not always shut down when
an error code is displayed.
An Error Code will be displayed when
an abnormal condition arises. This error
