User Instructions

† Read Installation Manual Carefully
† Ensure that there is at least 9 feet head of water pressure at the
top of the boiler.
† Ensure that the boiler(s) is connected to the system via a low
loss balance header.
† DO NOT remove the dust caps from the air and exhaust pipes
until ready to connect.
† Ensure that ALL dust particles, filings , plastic chips etc. are
removed from the inlet pipe.
† If the installation is a replacement the system must be flushed
clean. System should be drained hot, then refilled, then drained
again until the water is clean.
† Ensure that there is a proper electrical supply ie 230V fused at
13A for the permanent live.
† Ensure that the external controls are configured to form a link
between terminals 17 & 18 to enable boiler.
† Take great care with pipe connections to ensure that no
damage is done to the internal pipework.
† Ensure that the 22mm condensate pipe is not exposed to
freezing conditions.
† Make sure that the exhaust pipe terminates away from windows
or vents and is out of reach.
† Make sure that the air inlet and exhaust pipe outlets are at least
500mm apart.
† Check tightness of all connections in the boiler before firing.
† Ensure that the terminals supplied are fitted to both the exhaust
and air inlet pipes.
† The system must be free from air before firing.
† Gravity circuits are not allowed.
WD180/0/99
KESTON CONDENSING BOILERS
IMPORTANT
KESTON 260 & 340
INSTALLATION KEY POINTS