H Maximum Temperature Limit; H Differential Temperature - Viessmann Dekamatik-M1 Operating Instructions Manual

Maximum temperature limit
Electronic temperature high
A
limit (factory setting)
Maximum boiler water temperature
B
(factory setting)
BCE/EHEATING CURVE
SLOPE:
SHIFT:
MAX. LIMIT:
>CHANGE: . . . . . . . . . . . . . . . .
>BACK: . . . . . . . . . . . . . . . . . .
>MAIN MENU: . . . . . . . . . . . .
Example of display for changing the
"electronic temperature high limit"
Differential temperature
(only in conjunction with a Dekamatik-HK/SH heating circuit control unit)
The differential temperature is the minimum
difference by which the boiler water
temperature should exceed the highest
currently required supply temperature of the
heating circuit(s) with mixing valve.
Factory setting: 14 ºF / 8 ºC.
BC /EDIFF. TEMPERATURE
DIFFERENTIAL TEMP.:
EPREVIOUS: 08 ºC
R
CURRENT: 10 ºC
RE
>CHANGE: -/+, THEN
>MAINTAIN: . . . . . . . . . . . . . . .
Example of display for changing the
differential temperature
Maximum boiler water temperature limit
The Dekamatik incorporates two devices for
limiting the maximum boiler water
temperature:
- electronic temperature high limit
(factory setting 261 ºF / 127 ºC).
- adjustable high limit "
boiler water temperature
(factory setting 167 ºF / 75 ºC).
To change the maximum supply
1.4 temperature limit:
0 ºC
H Use selector buttons as per menu
127 ºC
structure (Overview 1, page 8) to select
the heating curve for the boiler
A
circuit.
C
D
H Make the change with the "
adjustment knob and confirm with the
appropriate key.
Changing the differential temperature
H Use the selection buttons as per menu
structure (Overview 1, page 8) to call up
the differential temperature.
H Enter new value and confirm.
. . . . . A
B
2.4 Settings and Adjustments
The adjustable high limit "
precedence over the electronic
temperature high limit
i.e. you can only effectively influence the
maximum supply temperature below the
value set on the adjustable high limit "
" for limiting the
Note:
When domestic hot water is being heated,
the boiler water temperature
is limited by the electronic calculation and
the adjustable high limit "
The maximum limit of the supply
temperature set here is not affected
by this.
"
" takes
" .
".
15