146
CONTROL PANEL
INSTALLATION
3.7.2
Heating / Cooling / Standby
The
Connect Touch
control system determines the unit heat/
cool status.
9
Chillers can work in cooling mode only.
9
The heat pumps can work in cooling or heating mode.
In case of heat pumps, the user can enable the automatic heat/
cool switching option; the option can be manually set by the
user (the automatic switching is disabled by default).
The automatic switching logic is the following:
− when the outdoor air temperature exceeds the cooling
threshold [cauto_sp] the cooling mode is activated;
− when the outdoor air temperature is lower than the
heating threshold [cauto_sp] the heating mode is ac-
tivated;
− when the outdoor air temperature is within the switch-
ing threshold range indicated above the unit does not
activate the cooling nor the heating mode: in fact, it is
in Standby mode, i.e. the compressors are stopped and
the water pump can be running. However, it is possi-
ble that the pump is stopped in Standby mode if the
parameter [pump_sby] in the Pump Configuration menu
(PUMPCONF) is set to "yes".
Outdoor
air
temperature
Heating
threshold
[hauto_sp]
Cooling
threshold
[cauto_sp]
Heating
Standby
Cooling
Heating / Cooling switching for heat pumps
Control of the operating modes
The operating mode, i.e. cooling or heating, is set according to
the following parameters:
−
Control type
: Local, Remote or Network
−
Local heat/cool selection [hc_sel]
: Heat/Cool selection
when the unit is in Local mode
−
Remote heat/cool selection [onsw_cr]
: Heat/Cool selec-
tion when the unit is in Remote mode
−
Network heat/cool selection [HC_SEL]
: Heat/Cool selec-
tion when the unit is in Network mode
−
Outdoor air temperature [OAT]
: Heat/Cool setpoint se-
lection when automatic switching is enabled.
Control type
Heat/Cool (Local)
Heat/Cool (Remote)
Heat/Cool (Net-
work)
Outdoor air tempera-
ture
(2)
Operating mode
local
cool
-
-
-
cool
local
heat
-
-
-
heat
local
auto (1)
-
-
>ca 1 K
cool
local
auto (1)
-
-
<hauto_sp -1 K
heat
local
auto (1)
-
-
ha 1 K < oat <
cauto_sp -1 K
standby
local
-
on_cool
-
-
cool
local
-
on_heat
-
-
heat
local
-
on_auto
-
>ca1 K
cool
local
-
on_auto
-
<hauto_sp - 1 K
heat
remote
-
on_cool
-
-
cool
remote
-
on_heat
-
-
heat
remote
-
on_auto
-
>ca 1 K
cool
remote
-
on_auto
-
<hauto_sp - 1 K
heat
remote
-
on_auto
-
ha 1K< oat <
cauto_sp – 1K
standby
network
-
-
cool
-
cool
network
-
-
heat
-
heat
network
-
-
auto
(1)
>ca 1 K
cool
network
-
-
auto
(1)
<hauto_sp - 1 K
heat
network
-
-
auto
(1)
ha 1K< oat <
cauto_sp - 1 K
standby
(1) If automatic switching has been selected through the user configuration, otherwise set by default to "cooling".
(2) cauto_sp = cooling switching setpoint; h auto_sp = heating switching setpoint; oat = outdoor air temperature.
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Страница 169: ...169 ALARM CODES INSTALLATION ...
Страница 185: ...185 OVERVIEW OF THE PARAMETERS INSTALLATION ...
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