Viessmann VITOCAL 151-A Installation And Service Instructions Manual page 7

Safety instructions
Safety instructions for operating the system
What to do if refrigerant escapes
Danger
Escaping refrigerant can lead to fire
and explosions that result in very
serious injuries or death. There is a
risk of asphyxiation if it is breathed
in.
Ensure very good ventilation
■
especially in the floor area of the
outdoor unit.
No smoking! Prevent naked
■
flames and sparks. Never switch
lights or electrical appliances on
or off.
Evacuate any people from the
■
danger zone.
From a safe position, switch off
■
the electricity supply for all system
components.
Remove ignition sources from the
■
danger zone.
Let the system user know that no
■
ignition source may be brought
into the danger zone for the dura-
tion of the repair.
Repair work must be carried out
■
by an authorised contractor.
Only recommission the system
■
after it has been repaired.
Danger
Direct contact with liquid and gas-
eous refrigerant can cause serious
damage to health, e.g. frostbite
and/or burns. There is a risk of
asphyxiation if it is breathed in.
Prevent direct contact with liquid
■
and gaseous refrigerant.
Never breathe in refrigerant
■
vapours.
(cont.)
If water escapes from the appliance
Danger
If water escapes from the appliance
there is a risk of electric shock.
Switch off the heating system at the
external isolator (e.g. fuse box,
domestic distribution board).
Danger
If water escapes from the appli-
ance, there is a risk of scalding.
Never touch hot heating water.
What to do if the outdoor unit ices up
!
Please note
A build-up of ice in the condensate
pan and in the fan area of the out-
door unit can cause damage to the
equipment.
Please note the following:
Do not use mechanical items/aids for
■
the removal of ice.
Before using electrical heating applian-
■
ces, check the refrigerant circuit for
leaks with a suitable measuring device.
The heating appliance should not be
–
a source of ignition.
The heating appliance must meet the
–
requirements of EN 60335-2-30.
If ice regularly builds up on the outdoor
■
unit (e.g. in areas where frost and
heavy fog occur frequently), install fan
ring heating (accessories) that is suita-
ble for refrigerant R290 and/or an elec-
tric ribbon heater in the condensate
pan (accessories or factory-fitted).
Safety instructions
7