EDM SYSHP MINI DCI

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7.10.3 ADDITIONAL HEATING SOURCE MENU
MENU > FOR SERVICEMAN > OTHER HEATING SOURCE > ADDITIONAL
HEATING SOURCE
To enter the ADDITIONAL HEATING SOURCE menu, navigate to the OTHER
HEATING SOURCE menu, scroll to YES on the ADDITIONAL HEATING SOURCE
line and press OK.
Figure 3-7.32: ADDITIONAL HEATING SORUCE menu
T4_AHS_ON sets the ambient temperature below which the addional heang source is used. If the ambient temperature is
above T4_ASH_ON, the addional heang source is not used. The relaonship between operaon of the addional heang
source and the ambient is shown in the picture below.
dT1_ASH_ON sets the temperature dierence between the heat pump’s leaving water set temperature (T1S) and the heat
pump’s leaving water temperature (T1) above which the addional heang source is on. When T1S - T1 ≥ dT1_AHS_ON the
addional heang source is on.
dT1_ASH_OFF sets the temperature dierence between the heat pump’s leaving water set temperature (T1S) and the heat
pump’s leaving water temperature (T1) below which the addional heang source is o. When T1 - T1S ≥ dT1_AHS_OFF the
addional heang source is o. Note: dT1_ASH_OFF can take values in the range -5°C to 0°C.
t_ASH_DELAY sets the delay between the compressor starng and the addional heang source being turned on.
Abreviaons:
AHS: Addional heang source
T1: Heat pump leaving water temperature
T1S: Heat pump leaving water set temperature
T4: Outdoor ambient temperature
Compressor
Time
Heat mode by
AHS only
Heat mode by heat
pump and AHS
Heat mode by
heat pump
Figure 3-7.33: T4_AHS_ON
Abreviaons:
AHS: Addional heang source
T4: Outdoor ambient temperature
Figure 3-7.34: Addional heang source delay