28
ASSA ABLOY Hospitality
66 8003 016-3
4.2.1 Heating
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 B)
2 pipe fan coil
2 pipe fan coil with
automatic switching
Proportional
Floating valve
Figure 29
4.2.1.1 2-pipe fan coil with automatic switching
Figure 30
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.
