21
for the technician
First firing, regulation and servicing instructions
FIRST FIRING, REGULATION AND
SERVICING
INSTRUCTIONS
ATTENTION: the operations described below must be carried out only by qualified
personnel [authorized by HERMANN].
When regulation/measuring is over, remember to tighten pressure tapping point screws
and ALWAYS check for gas leaks!
Before boiler ignition, verify that pump is not blocked due to
its inactivity: unscrew the plug located in the middle of the
cap to gain access to the rotor shaft, and turn it manually
using a screwdriver or another suitable tool.
During the first ignition of the brand new boiler, it is necessary
that burner works for at least 30 minutes, before performing
combustion checks. During this time, the fumes of the eventual
residual manufacturing materials are produced, and they could
alter the measured values.
Note: When boiler is electrically connected (or is ignited) it is
necessary to wait about 90 seconds before having the comple-
te control of the boiler. Such delay can be temporary excluded
through programming parameter n° 9 (see “Regulation
programming”) and it must be activated to guarantee perfect
boiler working.
Gaining access to
manual regulation devices
1. Unscrew screws located above boiler, shift small blocking plate
1, remove front cover 2 lifting it up.
2. To remove lower grid, if any, unscrew screws [3], push, lower and shift it forward.
Note: lower grid is spare inside packing, not assembled.
3. Unscrew fixing screws [4] and extract control panel [5] forward, rotating it around hinges.
4. Once regulation are over, reverse perform steps from 3 to 1.
Preliminary gas control
All boilers are tested and factory set during manufacture; however, it is advisable to check that the
gas type and the burner pressures are correct. Follow the procedures described in this section.
— All connections to boiler (water, gas, heating system and electricity) must work. Green light on,
yellow and red light off.
— Open control cover and turn boiler on by pushing
knob. Green light on, on to display
symbol appears with its requested (set) domestic water temperature.
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