Viessmann Dekamatik-M1 Operating Instructions Manual page 28

4.5 Settings Checklist
Default factory setting
H If boiler (shunt) pump
20 B
The boiler (shunt) pump switches on when the boiler water tem-
perature falls below the minimum value
Boiler isolation valve
45
H Off delay for boiler (shunt) pump and for boiler isolation valve:
10 minutes
Weather-dependent blocking
H Weather-dependent blocking of lag boilers is not
activated
H Automatic boiler sequence control (only when lead boiler
selector switch "FK/WA" is in setting "
Automatic change of boiler sequence takes
place after 1000 hours run of the first stage burner or of the
basic load stage of the first boiler
Domestic hot water heating
H Without DHW priority control:
The system pump pump
133
DHW production
H Adjustment range of DHW tank temperature is
50 to 140 ºF / 10 to 60 ºC
H A call for heat for DHW production causes activation of the
DHW pump only after the boiler water temperature is approx.
13 ºF / 7 ºC above the DHW tank setpoint temperature.
H After DHW production is complete, the DHW pump continues to
operate, until
- the temperature differential between the boiler and DHW tank
water is less than 13 ºF / 7 ºC or
- The DHW tank setpoint temperature is exceeded by
13 ºF / 7 ºC or
- the calculated boiler water temperature (required by outdoor
control) is reached.
The time delay for deactivation occurs for a maximum of 12
minutes.
H The boiler water temperature is approx. 36 ºF / 20 ºC higher
than the DHW setpoint temperature during DHW production
H "Supplementary DHW production function" is not activated.
H If supplementary DHW production function is activated:
DHW is briefly heated to a temperature of 140 ºF / 60 ºC
H Without remote operating program switching
(via telephone)
H Without remote operating program switching via
Dekatel-F
28
is utilized:
")
remains activated during
Alternative possibilities
j The boiler (shunt) pump switches on when the boiler is released
j Off delay for boiler (shunt) pump and for boiler isolation valve:
......... minutes
j Weather-dependent blocking is activated when the actual and
the damped outdoor temperature is at least 2 ºF / 1 ºC higher
than the entered value ........ ºF / ........ ºC
j Automatic change of on/off sequence of the boilers takes
place after ........ hours run
j With DHW priority over the circuit pump(s):
The system pump is switched off during
133
DHW production;
it is not switched on again until the DHW pump
for DHW tank is switched off (see also
21
the following changes)
j Adjustment range of DHW tank temperature is
50 to 176 ºF / 10 to 80 ºC
j A call for heat for DHW production causes immediate activation
of the DHW pump
j After DHW production is complete (DHW tank setpoint tempera-
ture is reached), the DHW pump deactivates immediately
j Boiler water temperature is restricted to the adjustable high limit
setting " " during DHW production.
j "Supplementary DHW production function"≙brief heating of
DHW tank
........ times per day/once every ........ days
j This temperature is set to ........ ºF / ........ ºC
j With remote operating program switching (telephone contact)
j With remote operating program switching via Dekatel-F