31
ASSA ABLOY Hospitality
66 8003 016-3
4.2.2 Cooling
1. Click the plus sign at
HVAC
in
the left pane of the
Thermostat profile details
dialog and mark
Heating
.
2. In the drop-down-menu at
Type
, the following
alternatives are available:
n/a
; default
4 pipe fan coil
Heat pump reversed valve
(Type O)
2 pipe fan coil
2 pipe fan coil with
automatic switching
Proportional
Floating valve
Figure 33
4.2.2.1 2-pipe fan coil with automatic switching
Figure 34
If '2-pipe fan coil with automatic switching' is chosen as HVAC type, the further
alternatives
Pipe temperature sensor
and
Trigger level
are available.
If the pipe temperature sensor is a
bimetal switch
(open or closed depending
on the temperature it senses), choose for
Pipe temperature sensor
whether
it should be 'Cooling' or 'Heating'.
If the pipe temperature sensor is an
1k NTC resistor
, a
Trigger level
(in the
range 0-100%) for switching between heat and cool should be chosen. When the
temperature reaches the switch-over-temperature (default 3 ºF; this is chosen
under the
Deadband
alternative in the
Thermostat profile details
dialog),
it is checked whether the pipe temperature sensor has reached the trigger level
so that the thermostat can change mode from heating to cooling or vice versa.
Note:
When '2-pipe fan coil with automatic switching' is chosen as HVAC type,
the cooling relay (
Y
) is the only relay that applies, forced by the thermostat.
