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1 USER INSTRUCTIONS
1.1 User Warnings
Do not remove or adjust any part of this unvented water heater.
If the unvented water heater develops fault, such as a flow of water from the discharge pipe switch
the heater off.
In all cases contact a competent installer.
Documented records of annual services must be retained by the user.
If cold/warm water is discharged from the cylinder via the tundish, call your installer.
If extremely hot water is discharged,
immediately
switch off ALL heat sources (which may
include boilers, heat pumps, solar thermal systems and immersion heaters), isolate their
electrical supplies and call your installer.
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
The recommended storage temperature for both direct and indirect cylinders is 60-65°C. In hard
water areas consideration should be given to reducing this to 50-55°C. In some applications
guidance on Legionella control and safe water delivery temperatures can require a storage
temperature of 60 - 65°C, distributing to outlets at 50 - 55°C, using thermostatic mixing valves to
control the final outlet temperature. For details consult local regulations applicable to the
installation.
When a hot tap is turned on there may be a short surge of water
– this is quite normal with
unvented systems and does not mean there is a fault. When you first fill a basin, the water may
sometimes appear milky. This is due to air bubbles in the water which will clear very quickly.
1.2 Cylinder Thermostat
All cylinders (except Direct models) are fitted with one or more
cylinder thermostats to control the heat input to the cylinder from a
remote heat source, such as a boiler, heat pump or solar thermal
installation. The temperature of each cylinder thermostat is
adjustable between
nominally
40°C and 70°C. Turn the control
knob clockwise to increase temperature, and anticlockwise to
decrease.
Each cylinder thermostat has a built-in manually reset safety
thermostat which will ‘lock out’ in the event of the cylinder
overheating and which will need to be reset in order to restore
operation.
In the event of a lockout situation occurring, it is vital to contact the
installer of the appliance to determine and rectify the cause of lock
out.
All electrical supplies to the appliance must be isolated before attempting to reset the thermostat.
Control dial
Reset button