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5. GENERAL INFORMATION
TO SHUT DOWN THE BOILER
Note. The inbuilt frost protection for the boiler
will not function if there is no mains supply
to the boiler.
1. For short periods
Set the external controls to OFF. Wait 4
minutes and then isolate the mains supply
to the boiler.
2. For longer periods
Set the external controls to OFF. Switch
the electricity supply to OFF. For longer
periods the entire system should be drained,
including the domestic hot water supply.
TO RELIGHT THE BOILER
Refill the system if it has been drained,
taking care to ensure no air is in the boiler
or system.
Repeat the procedure detailed in ‘To light
the boiler’.
FROST PROTECTION
The KESTON HEAT2 boiler has built into its
control system the facility to protect the boiler
only against freezing.
Note
. This may not protect remote parts of
the system, in which case a separate frost
thermostat should be fitted.
BOILER OVERHEAT THERMOSTAT
Boiler overheating is detected by electrical
sensors connected to the boiler control
module. If the boiler overheats it will shut
down and the display will show Overheat
Lockout. Press the reset button and the
boiler will relight. If the fault recurs turn off
the boiler and consult a suitably qualified
Gas Safe registered engineer or in IE a
competent person.
CONDENSATE DRAIN
This appliance is fitted with a siphonic
condensate trap system that reduces the risk
of the appliance condensate from freezing.
However should the condensate pipe to
this appliance freeze, please follow these
instructions:
a. If you do not feel competent to carry out
the defrosting instructions below please call
your local Gas Safe Registered installer for
assistance.
b. If you do feel competent to carry out the
following instructions please do so with care
when handling hot utensils. Do not attempt to
thaw pipework above ground level.
If this appliance develops a blockage in its
condensate pipe, its condensate will build
up to a point where it will make a gurgling
noise prior to locking out displaying “Ignition
Lockout” on the display. If the appliance is
reset it will make a gurgling noise prior to it
locking out displaying “Ignition Lockout” on
the display.
To unblock a frozen condensate pipe;
1. Follow the routing of the plastic pipe from
its exit point on the appliance, through its
route to its termination point.
Locate the frozen blockage. It is likely that
the pipe is frozen at the most exposed point
external to the building or where there is
some obstruction to flow. This could be at
the open end of the pipe, at a bend or elbow,
or where there is a dip in the pipe in which
condensate can collect. The location of the
blockage should be identified as closely as
possible before taking further action.
2. Apply a hot water bottle, microwaveable
heat pack or a warm damp cloth to the frozen
blockage area. Several applications may
have to be made before it fully defrosts.
Warm water can also be poured onto the
pipe from a watering can or similar. DO NOT
use boiling water .
3. Caution when using warm water as
this may freeze and cause other localised
hazards.
