Operating Instructions

Network interface
Technical Information Logamatic LON-Gateway- Subject to modifications resulting from technical improvements!
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3.4.3 DHW heating
Format:
Changing the operating mode
With the HVAC_heat / HVAC_off setting, the operating mode for the consumer is changed
externally via the LON data bus.
Set range: 86 °F to 140 °F (30 °C to 60 °C) (with approval up to 176 °F (80 °C)); in 1-degree
intervals
Notes:
• The set point temperature for DHW heating specifies the temperature level for the consumer in
automatic mode or day mode.
• If for DHW heating temperatures > 140 °F (60 °C) are desired, the range up to 176 °F (80 °C)
can be released on the service level in the DHW menu.
16 Operating mode (D/N/A) SNVT_hvac_mode
(108)
nviHK1TgNtAt 1
Tab. 61 Value for changing the operating mode of DHW heating
Value Designation Description
0 HVAC_AUTO The DHW control follows the set DHW program (automatic mode).
1 HVAC_heat The DHW control operates in constant operation (manual day mode).
6 HVAC_off The DHW controls are turned off (manual night mode).
17 DHW set point temperature SNVT_temp_p(105) nviWW_Set_Tp 2
Tab. 62 Value for changing the DHW set point temperature (DHW heating)
WARNING: Risk of scalding at the hot water taps.
There is a risk of scalding at the hot water taps if DHW temperatures can be set above
60 °C and during thermal disinfection.
B Select settings > 140 °F (60 °C) only if a thermostatic mixing valve is installed as
protection against scalding.
18 Recirculation pump operating
mode (D/N/A)
SNVT_hvac_mode
(108)
nviZP_TgNtAt 1
Tab. 63 Value for changing the operating mode