Precautions and preparations listed are for general knowledge and to define basic guidelines. Local codes and existing practices should be observed and preformed by a professional.
Due to Ice Air’s ongoing product development programs, the information in this document is subject to change without notice.
10
Permanent Override
1. Holding UP and DOWN button for two seconds to enter
Permanent Override mode. Permanent Override icon will turn on.
2. In Heat mode, Heat set point can be adjusted.
3. In Cool mode, Cool set point can be adjusted.
4. In Auto mode, Heat set point will be set first and press UP or
DOWN to set the Heat set point. Press FAN to confirm the Heat
set point. Cool set point will be set second and press UP or
DOWN to set the Cool set point.
5. Permanent Override will be canceled if user changes the
operation mode or turns off the unit.
6. Hold FAN button five seconds to cancel the Permanent
Override mode.
Sequence of Operations – Fan Coil
Manual Heat/Off/Cool System Switch:
A System Heat/Off/Cool
Switch, located on the thermostat’s cover, shall allow the operator
to manually select the Heating or Cooling mode of operation or to
disable the fan and control valve in the “Off” position. The fan shall
run continuously with the system switch in the Heat or Cool mode
(On) and shall stop when the system switch is placed in the “Off”
position.
Auto Seasonal Changeover (ASC):
A Auto Seasonal Changeover
switch mounted on the inlet piping to the fan coil, shall sense the
temperature of the water to determine whether the valve should be
open or closed.
If the switch is in Cooling mode and inlet water temperature is below
85°F, the Auto Seasonal Changeover switch shall open the valve
and allow cool water to circulate through the system else the valve
remains shut to prevent hot water from flowing through and heating
the space in cooling mode.
If the switch is in Heating mode and inlet water temperature is above
85°F, the Auto Seasonal Changeover switch shall open the valve
and allow hot water to circulate through the system else the valve
remains shut to prevent cold water from flowing through and cooling
the space in heating mode.
Cooling Mode:
With the ASC switch in the Summer (Cooling)
position, the Heat/Cool thermostat shall cycle the water control valve,
via the thermostat’s cooling signal, to maintain the desired space
temperature in reference to the thermostat’s set point.
Heating Mode:
With the ASC switch in the Winter (Heating) position,
the Heat/Cool thermostat shall cycle the water control valve, via
the thermostat’s heating signal, to maintain the desired space
temperature in reference to the thermostat’s set point.
Variable Fan-Speed:
Heating Only Mode
• High speed fan will run when room temperature is less than 4°
below set temperature
• Low speed fan will run when the room temperature is less than
or equal to 2° below the set temperature
• Fan speeds throttle from High speed to Low speed when
transitioning from a difference of 4°F to 2° of the set
temperature
• The fan will shut off when the room temperature meets the set
temperature.
Cooling Only Mode
• High speed fan will run when room temperature is higher than
4°F below set temperature
• Low speed fan and the compressor will run when the room
temperature is higher than or equal to 2°F of the set temperature
• The fan will shut off when the room temperature meets the set
temperature.
