Atag iR 15 - Page 36

Installation & Servicing instructions ATAG iR-Range
36
a CH system
The CH program is always active after start-up.
This is indicated by the upper
.
Ifthereisheatrequest,itisindicatedbyaashing
and the heating will be put into
operation
.
The circulation pump will switch on and the boiler will switch on after 1 to 2 minutes.
When there is no more heat requested the radiator symbol
maybesolidorashing,buttheame
symbol will disappear. The pump will continue to run due to the pump over run feature (overrun time
conrmedintechnicalspecicationtablepage7).
b Pump function
The central heating pump is wired to the pump electrical connections on the back of the control panel. See
gure10.a.
Danger of frost
If there is danger of frost damage to the CH installation, it is advisable to let the pump
run continuously.
By pressing both - buttons at the same time for 8 seconds the pump can be switched on
continuously.
If the pump is set to continuously this is displayed by
.
Boiler frost protection
Ifthe(T1)owsensorregistersatemperatureof5°Corbelowintheboiler,theboilerwillreup.Theboiler
keepsonringuntilthetemperaturereaches10°C(measuredontheowsensor)andtheboilerswitcheso󰀨
again.
In this mode the
symbolwillash.