Operating instructions

5
CONTROLS
GENERAL INFORMATION
A control panel, shown in Fig. 3, is built
into each absorption chiller or chiller-heater and
is located on the control box, behind the front
panel as shown in Fig. 4. After inspecting the
control panel or changing the mode of operation,
make sure that the front panel is replaced and
secured with screws to prevent rain from
entering the cabinet and unauthorized tampering
with the controls.
The chiller or chiller-heater may also be
supervised and controlled by external control
systems when the necessary interconnections
are installed. Additional controls and interlocks
can be explained by your Authorized Yazaki
Service Provider.
Once COOLING or HEATING operation is
selected and the unit is started, the chiller or
chiller-heater will function automatically and
remain in operation as long as there is a
demand for chilled water or hot water. The heat
medium pump or bypass valve is cycled ON
and OFF to control flow of heat medium
through the generator in response to the
chilled/hot water temperature. When the chilled
water temperature is satisfied, the solution is
automatically diluted and the cooling water
pump is stopped after 4 minutes.
Cooling Mode Switch (chiller-heater only)
Fig.3 CONTROL PANEL
Heating Operation Lamp
(chiller-heater only)
Cooling Operation Lamp
Heating Mode Switch
(chiller-heater only)
Power ON Lamp
Alarm Reset
Error Code
Run Lamp
Stop Lamp
Standby Mode Lamp
Freeze Protection ON Lamp
REMOTE-STOP-RUN Switch
ERROR No.
RESET
POWER
COOL
HEAT
STOP
REMOTE
RUN
RUN
STOP
IF RUN
PRETIME