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GAS SAFETY (INSTALLATION AND USE)
REGULATIONS 1998
It is the law that all gas appliances must be installed by a compe-
tent person in accordance with the above regulations. Failure to
install appliances correctly could lead to prosecution. It is in your
interest and that of safety to ensure compliance with the law. The
manufacturers notes must not be taken, in any way, as over-riding
statutory obligations.
WARNING: This appliance must be earthed and protected by a
3 amp fuse.
ELECTRICITY SUPPLY: 230V ~ 50Hz
IMPORTANT: To get the best from your Highflow please read
these instructions carefully.
NOTE: In the event of a fault the appliance should not be used
until the fault has been corrected by a competent person.
GENERAL DESCRIPTION
(See Fig.1.)
The HIGHFLOW 400 ELECTRONIC MODELS are combined
domestic hot water and central heating appliances. They consist of a
gas fired boiler having a varying output of between 8.8/11 kW and 24
kW, a heatbank containing stored primary water, a heat-exchanger to
provide domestic hot water via the boiler, a circulating pump, water
diverting valve and all necessary controls to provide central heating
and mains fed domestic hot water and central heating.
The hot water delivery rate is limited to 18 l/m. The specific
rate, declared as part of the relevant standard, is 20 l/m. To achieve
this a tank temperature of 75°C is required.
The appliances can operate in one of three modes. Hot water
only or hot water and central heating or heating only.
Hot Water Mode:
When a demand is made for hot water by opening a tap or show-
er hot water will be delivered almost immediately. The flow turbine
will energise the pump and circulate primary hot water around the
boiler and water to water heat exchanger. The burner will light to
maintain the temperature of the heatbank.
When hot water is no longer required the appliance will contin-
ue to operate, the burner will cycle a number of times, until the heat-
bank has returned to temperature. The pump will continue to run for
a few minutes to dissipate the residual heat around the appliance.
If no hot water demand is made then the boiler will only use
enough energy to maintain the temperature of the heatbank.
The maximum temperature of the water drawn off from the
heatbank is governed by the setting of the Hot Water Temperature
Control. (See Fig.2.)
A flow restrictor is fitted within the appliance which limits a hot
water delivery rate to a maximum of 18 (±15%) litres/minute.
The restrictor is removed by the installer if a cistern feed hot
water system is installed.
GENERAL
INFORMATION
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