To Shut Down The Boiler; Frost Protection; Boiler Overheat Protection - Keston 30C User Manual

Central Heating
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The boiler controls the central heating radiator temperature to a maximum of 80 C, adjustable via the CH temperature control (C).
Approx. flow temperatures for the boiler thermostat settings are:
Knob Setting Flow Temperature
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Minimum 40 C (104 F)
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Maximum 64 C (147 F)
The Keston 30C is a high efficiency combination boiler which is most efficient when operating in condensing mode.
The boiler will operate in this mode if the CH temperature control (C) is set to the 'e' position (economy mode) or below. This
control should be set to a maximum for very cold periods.

TO SHUT DOWN THE BOILER

Set the mode knob control to OFF.
TO RELIGHT THE BOILER
Repeat the procedure detailed in 'To light the boiler'.

FROST PROTECTION

If no frost protection is provided and frost is likely during a short absence from home, leave the heating controls (if fitted) at
a reduced temperature setting. For longer periods, the entire system should be drained.
If the system includes a frost thermostat then the timer can be left off (if fitted). The mains supply should be left switched ON,
with the boiler thermostat left in the normal running position.

BOILER OVERHEAT PROTECTION

The boiler controls will shut down the boiler in the event of overheating. Should this occur, a fault code "Overheat Lockout"
- "1 Fill system to 1.0 bar" - "2 Bleed radiators" - "3 Check radiator valves open" - 4 Reset boiler" - "5
Contact Installer" will be displayed.
Reset boiler by turning the mode control knob (D) to reset position and immediately turn knob back to required setting. The
boiler will relight. If the fault recurs, turn off the boiler and consult a Gas Safe Registered Engineer or in IE a Registered Gas
Installer (RGII).
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