AHS
sets whether or not the system has an additional heating source and, if it does, whether or not it should be used. If
the system does not have an additional heating source, select
NON
. If the system has an additional heating source and the
M-Thermal Mono unit should be able to control it, select
YES.
If the system has an additional heating source but the
M-Thermal Mono unit should not be able to control it, select
NON.
SOLAR ENERGY
sets whether or not a solar energy kit is installed. If a solar energy kit is installed select
YES
and the heat
pump will not provide heated water to the DHW tank when the solar energy kit is running.
7.10.2
BACKUP HEATER menu
MENU > FOR SERVICEMAN > OTHER HEATING SOURCE > BACKUP HEATER
To enter the
BACKUP HEATER
menu, navigate to the
OTHER HEATING SOURCE
menu,
scroll to
YES
on the
BACKUP HEATER
line and press
OK
.
HEAT MODE
sets whether or not the backup electric heater is used in space heating
mode.
DHW MODE
sets whether or not the backup electric heater is used in DHW mode. Note: If
YES
is selected for
TANK
HEATER
in
MENU
>
FOR SERVICEMAN
>
DHW MODE SETTING
, the backup electric heater is not used in DHW mode.
T4_IBH_ON
sets the ambient temperature below which the
backup electric heater is used. If the ambient temperature is above
T4_IBH_ON
, the backup electric heater is not used. The
relationship between operation of the backup heater and the
ambient is shown in Figure 3-7.30.
dT1_IBH_ON
sets the temperature difference between the heat pump’s leaving water set temperature (T1S) and the heat
pump’s leaving water temperature (T1) above which the backup electric heater heating element(s) are on. When T1S - T1 ≥
dT1_IBH_ON the backup electric heater is on (on models where the backup electric heater has a simple on/off control
function) or the backup electric heater’s first element is on (on models where the backup electric heater has a two-step
control function). On models where the backup electric
heater has a two-step control function, when T1S - T1 ≥
dT1_ 2°C, the backup heater’s second element is
on.
t_IBH_DELAY
sets the delay between the compressor
starting and the backup electric heater’s first element
being turned on.
t_IBH12_DELAY
sets the delay between the backup
electric heater’s first element being turned on and the
backup electric heater’s second element being turned on.
Figure 3-7.29:
BACKUP HEATER menu
Figure 3-7.30: T4_IBH_ON
Abreviations:
T4: Outdoor ambient temperature
IBH: Backup electric heater
Figure 3-7.31: t_IBH_DELAY, t_IBH12_DELAY
Abreviations:
IBH 1: Backup electric heater’s first heating element
IBH 2: Backup electric heater’s second heating element
T1: Heat pump leaving water temperature
T1S: Heat pump leaving water set temperature
T4: Outdoor ambient temperature
7.1 BACKUP HEATER
-5°C
5°C
30MIN
5MIN
HEAT MODE
DHW MODE
T4_IBH_ON
dT1_IBH_ON
t_IBH_DELAY
t_IBH12_DELAY
YES
YES NO
NO
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