6
CONTROLS
GENERAL INFORMATION
A control panel, shown in Fig. 3, is
built into each absorption chiller-heater
and is located on the front of the control
box. The control box is located behind
the right-hand service door, as shown in
Fig. 4. After inspecting the control panel
or changing the mode of operation, make
sure that the front panel is latched and
locked in order to prevent rain from
entering the cabinet and damaging the
controls. This will also help to prevent
unauthorized tampering with controls and
settings.
The chiller-heater may also be
supervised and controlled in a limited
manner by Building Automation Systems
(BAS, BMS)
when Remote Operation is
engaged. Additional controls and
interlocks may be required in some
instances. These controls and their
functions can be explained by your
Yazaki Authorized Service Provider.
Once
COOLING
or
HEATING
operation is selected and the unit has
started, the chiller-heater will function
automatically and remain in operation for
as long as there is a demand for chilled
or hot water. The burner modulates the
Generator heat input in response to the
leaving chilled/hot water temperature.
When the chilled water temperature
demand is satisfied, the solution pump
automatically changes to Dilution Mode
and the cooling water pump demand
stops after a minimum of 4 minutes
additional time.
Fig. 3
– Chiller-Heater Control Panel
