Operating Program; Operating Programs For Central Heating, Dhw, Frost Protection; Special Operating Programs; With Frost Protection Monitoring - Viessmann vitocrossal 300 Operating Instructions Manual

Operation

Operating Program

Operating programs for central heating, DHW, frost protection

Symbol
Central heating and DHW heating
w
"Only DHW"
w
Frost protection
9
Legend
F Special operating programs

Special operating programs

"External hook-up"
Your heat pump control unit is regulated by a higher
control unit.
"External program"
The operating program was changed by a
communications interface (e.g. Vitocom 100).
"Holiday program"
Refer to page 23.
Note: In the extended menu, you can call up the set
operating program under "Information"
(refer to page 39).
16
Operating program
"Heating and DHW"
"Only DHW"
"Standby mode"
Vitocrossal 300 CU3A 26 to 57 Operating
Function
H The rooms of the selected heating circuit are heated
in accordance with the room temperature and time
program specified (see section "Central heating").
H DHW is heated in accordance with the DHW
temperature and time program specified (see section
"DHW heating").
H DHW is heated in accordance with the DHW
temperature and time program specified (see section
"DHW heating").
H No central heating.
H Frost protection enabled.
H No central heating.
H No DHW heating.
H Frost protection for the boiler and the DHW tank is active.

With frost protection monitoring

For every heating circuit select the "Standby mode"
operating program
H No central heating
H No DHW heating
H Frost protection for the boiler and the DHW tank
is active.
Single boiler system control: Refer to page 20
Without frost protection monitoring (shutdown)
When the boiler control and accessories are de-energized,
frost protection is not active for the boiler or the DHW
tank.
IMPORTANT
If outdoor temperatures of below 37°F (3°C) are expected,
take appropriate measures to protect the heating system
from frost.
If necessary, contact your heating contractor.

Information on a prolonged shutdown

H Circulation pumps may seize up as they are not being
supplied with power.
H It may be necessary to reset the date and time
(refer to page 28).