Service manual

once
p
er hour is tested the waitin
g
for heat demand O stand-b
y
the difference if not,
p
um
p
is started
difference between flow and continuous between flow and
return tem
p
eratures. return tem
p
eratures
must be less than 5°C if needed, turn on heatin
g
(
room thermostat
)
If the flow sensor tem
p
erature frost
p
rotection 8°C o frost check heat demand re
p
air heat demand on the
becomes below 8°C, the continuous
p
rotection
(
room thermostat
)
g
reen connector
re
g
ulation starts the
p
um
p
(
contacts 1 and 2
)
frost protection is finished, when
the temperature of return sensor
is above 15°C.
If the flow sensor tem
p
erature frost
p
rotection 3°C o. frost check heat demand re
p
air heat demand on the
becomes below 3°C, the continuous
p
rotection
(
room thermostat
)
g
reen connector
re
g
ulation starts the burner
(
contacts 1 and 2
)
frost protection is finished, when
the temperature of return sensor
is above 15°C.
If the
p
um
p
is not connected the
p
um
p
wirin
g
o
p
en P
p
um
p
wirin
g
check wirin
g
re
p
air
p
um
p
wirin
g
,
boiler will not start-u
p
. continuous disconnected connector or connection
Trouble shooting manual EN E000129004