Viesmann VITODENS 200-W Operations Instructions download pdf (Page 16)

Start-up / Shutdown

16

Shutting Down the Heating System

If you do not want to use your heating

sys t em temporarily, (e.g. during your

summer holidays), switch to stand-by

operation (see ”Shutting down a heating

circuit and stopping DHW heating”).

Note:

The circulation pumps are briefly s tarted

every 24 hours to prevent them from

seizing up.

If you do not want to use your heating

sys t em for a long period (several

months), you should shut down the

system.

We advise you to contact your heating

contractor before shutting down the

heating system for long periods. Your

heating contractor will take any

necessary action, (e.g. for frost

protection of the system or to safeguard

the heat exchanger s urfaces).

1. Switch the main ON / OFF switch

“8” OFF.

2. Close the gas shut-off valve.

3. Turn off the power supply switch or

disconnect power / pump module.

The power supply to the system is

now switched off.

There is no frost protection.

Note:

All control settings a re ret ained.

Starting a heating circuit and DHW heating

You want to heat your rooms and have

DHW av ailable.

Press “rw“for“Heating & DHW”.

If “Select heating circuit” is displayed

and “1r“ flashes:

H Select that heating circuit with ⊕ / ⊝,

to which the adjustment should apply.

H Confirm twice with

.

Press “rw“for“Heating & DHW”

again.

H Central heating will be provided with

normal or reduced room temperature

(frost protection) according t o the set

time program. Standard setting: from

06:00 to 22:00 hrs. with the normal

room temperature, otherwise with the

reduced room temperature.

H DHW heating (if a DHW tank or

instantaneous water heater is

installed) and DHW circulation pump

running (if connected to the control

unit) according to the selected time

program. Standard setting: from

05:30 to 22:00 hrs., DHW is heated

to the selected set temperature and

the DHW circulation pump is s witched

ON.

H Frost protection for the boiler and the

DHW tank is enabled.

Note:

“rw“ button illuminates:

H Symbol ”s” appears during central

heating with normal room

temperature.

H Symbol “m” appears during central

heating with a reduced room

temperature above 37ºF / 3ºC.

5369 299 v1.0 b

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