Dunkirk DWB Series - Manual (Page 32)

Water system pressure adjustment
The fi lling pressure with system cold, read on the boiler
water gauge, must be approximately 11 psi.
If the system pressure falls to values below minimum, the
boiler control will activate fault F37.
Low system pressure fault
Once the system pressure is restored, the boiler will
activate the 120-second air venting cycle indicated on the
display by FH.
TEST mode (heating power = 100%)
Press heating buttons simultaneously for 5 seconds to
turn on TEST mode. The boiler will ignite at the maximum
heating power set as described in the following paragraph.
On the display, the heating and tap water symbols will
blink; alongside, it will show the heating power and the
ignition power respectively.
To turn off TEST mode, repeat the sequence for turning it
on.
10 - OPERATING INSTRUCTIONS
32