Riello 20120391, Instructions For The Installer And For The Technical Support Service

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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.