SECTION 6 – OPERATION
FORM 155.32-ICOM2.EN.UL
ISSUE DATE:1/10/2018
92
JOHNSON CONTROLS
OPERATING STATUS
On the upper left of the screen below the
LOCAL
and
REMOTE
buttons is a list of options.
Each has a lamp to indicate ON or OFF for the following:
•
Startup:
Lights if the chiller-heater is ready to start. Light is off if the chiller-heater is
stopping or if it is not ready to start.
•
Low Combustion:
The light is lit when the low combustion hold is operating. The
combustion stays in the low position before the automatic temperature control process
runs.
•
Temp. Control:
Light is lit if the temperature control of the microcomputer panel
changes to RUN status. Turns off if the chiller-heater stops.
•
Thermo OFF:
In cooling mode, lights if the chilled water temperature falls to the au-
tomatic stop temperature. Turns off when the temperature rises enough to allow an
automatic restart. In heating mode, it lights if the hot water temperature rises to the
automatic stop temperature. It turns off when the temperature falls enough to allow an
automatic restart.
•
Load Limit:
Light is lit if the load restriction activates due to the cooling water tem-
perature, refrigerant temperature, or HG temperature or pressure is higher than the
set point. Light turns off when the load restriction is removed.
•
Dilution:
Light is lit during the dilution operation after the chiller-heater stops. It turns
off when the dilution operation is complete.
Set Point:
The set point of chilled/hot water leaving temperature is shown on the left of the
screen.
The system illustration lights (lines fill in) when the system is operating.
An illustration of the system shows the following information:
• Fuel Control Valve Control Output
• Chilled/Hot Water Entering or Leaving Temperature
• Cooling Water Entering or Leaving Temperature
• Refrigerant Temperature
• Absorber Temperature
• High Temperature Generator Pressure
• High Temperature Generator Temperature
• High Temperature Generator Concentration
• Purge Tank Pressure
