Buderus 500-24S Installation And Maintenance Instructions Manual page 37

NOTE
When summer operation is active then the
boiler will not operate for central heating until
summer operation has been deactivated.
Setting the flow temperature
NOTE
It is not possible to set the flow temperature
when the boiler is set to summer operation.
V Press
button ( fig. 54, item 2) four times then
adjust the flow temperature to the desired temperature
(30 °C – 80 °C) using the
item 1). Factory setting is 80 °C.
Frost protection
The boiler has an automatic frost protection. When the
CH flow temperature drops below 7 °C then the boiler will
start up.
2.1.3 Checking for gas leaks
Use a suitable pressure gauge for the different pressure
readings. It should be able to handle pressures up to
50 mbar with an accuracy of 0.01 mbar minimum.
V Disconnect the system from the power supply.
V Check all sections of gas pipework and connections
for signs of leaks before starting up the system for the
first time. If a leak is detected during tightness testing,
use an approved leak detector to check all connections
for possible escapes. The product must be certified as
a gas leak-testing agent. DO NOT allow the product to
come into contact with electrical wiring.
The test pressure of the gas pipe when the gas shut off
valve is open may not exceed 150 mbar.
Warning: ATTENTION
Check the used measuring nipples for gas
tightness.
Buderus 500-24S - Subject to modifications resulting from technical improvements
and keys ( fig. 49,
2
Commissioning
37