Frost Protection; Boiler Overheat Thermostat; Condensate Drain - Keston HEAT 45 Instruction Manual

To shut Down 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 Heat 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 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.
Keston Heat -
User's
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.
4. Once the blockage is removed and the condensate can flow
freely, reset the appliance. (Refer to "To Light the boiler")
5. If the appliance fails to ignite, call your Gas Safe Registered
engineer.
Preventative solutions
During cold weather, set the boiler stat to maximum, (Must return
to original setting once cold spell is over)
Place the heating on continuous and turn the room stat down to
15ºC overnight or when unoccupied. (Return to normal after cold
spell).
Escape of Gas
Should a gas leak or fault be suspected contact your local gas
supplier without delay.
Do NOT search for gas leaks with a naked flame.
Cleaning
For normal cleaning simply dust with a dry cloth.
To remove stubborn marks and stains use a damp cloth and mild
detergent.
DO NOT use abrasive cleaning materials.
5