Compex Technologies 400 User Manual
HIGHFLOW 400 ELECTRONIC
SERIES
USER INSTRUCTIONS &
CUSTOMER CARE GUIDE
G.C. NUMBERS
APPLIANCE NATURAL GAS L.P.G.
Fanned Flue (RSF) 47 311 61 47 311 64
Balanced Flue (BF) 47 311 62
Open Flue (OF) 47 311 63
EXCELLENCE COMES
AS STANDARD
Thank you for purchasing a Highflow 400 Electronic
gas-fired combination appliance.
Highflow 400 Electronic Series appliances are made by
Worcester Heat Systems and the strictest quality control standards are demanded throughout every stage of production.
Indeed, Worcester Heat Systems have led the field in inno-
vative appliance design and performance for more than 30
years.
The result is that
your new Highflow 400
Electronic appliance offers
you the very best of everything - quality, efficiency,
economical running costs,
proven reliability and
value for money.
What’s more,
you also have the assurance of our no-nonsense 1
year parts and labour guarantee.
And it’s backed up by
Worcester Care Call - a complete maintenance scheme to keep
your boiler operating at peak condition and efficiency.
No wonder that more and more people are agreeing that
when it is gas, it has to be Worcester Highflow 400 Electronic
Series.
Page No.
Operating Instructions
.................................... 3-11
Fault and Breakdowns 12
Maintenance and
Extended Warranty
Information ............ 13-14
Guarantee Details .. 15-16
CONTENTS
2
GAS SAFETY (INSTALLATION AND USE)
REGULATIONS 1998
It is the law that all gas appliances must be installed by a competent 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 shower 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 continue to operate, the burner will cycle a number of times, until the heatbank 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
3
Hot Water and Central Heating Mode:
The appliance will supply heat to the central heating system as
required. A demand for hot water at a tap or shower will override the
central heating function for the period of the domestic hot water
demand.
When domestic hot water is no longer required the burner and
pump will continue to operate until the heatbank is back to the
required temperature.
The appliance will then return to the central heating state and
its normal mode of operation.
Similarly the hot water is occasionally diverted from the central
heating system into the heatbank to maintain the stored primary hot
water temperature.
NOTE: If in doubt about the use of the controls ask your
installer to assist you.
Central Heating Mode:
When a demand is made for heating by the system controls (i.e.
a programmer or room thermostat).
The water diverter valve will open, the pump will energise circulating primary water around the heating system and the burner will
light. The appliance will operate as necessary to maintain the temperature of the radiators at the level set by the adjustment of the Heating
Temperature Control. (See Fig. 2.)
If the system no longer requires heat to maintain the desired
room temperature, the burner will extinguish. The pump will contin-
ue to run for a short period to
dissipate the residual heat from
the appliance and then switch
off.
4
Fig. 1. System Diagram of Highflow 400 Electronic Series.
Primary
Water
circulation
Water
diverter
valve
From
radiators
Mains
cold in
Flow tur-
bine
Domestic hot
water out
Expansion
vessel
Slot in
front cover.
(O.F. only)
Pilot observation window.
To
radiators
Circulating
pump
Heat
exchanger
Heatbank
Burner
Boiler
5
CENTRAL HEATING SYSTEM
During the first few hours of operation of the central heating
system, check that all radiators are being heated at an even rate.
Should the upper area of a radiator be at a lower temperature than
the base of the radiator, it should be vented by releasing air through
the venting screw at the top of each radiator. Make sure your installer
shows you how to carry out the operation. Repeated venting will
reduce the quantity of water in the system and this must be replenished for safe and satisfactory operation of the appliance. Should
water leaks be found in the system or excessive venting be required
from any radiator, a service engineer should be contacted and the system corrected.
SEALED HEATING SYSTEM
The appliance can be fitted to a sealed heating system which is
pre-pressurised. In this case your installer will advise you on the minimum and maximum pressure that should be indicated on the pressure gauge. See Fig. 3. Check regularly that this pressure is maintained and contact your installer or maintenance engineer if there is a
permanent significant drop in pressure indicated on the gauge. If the
system loses pressure it should be re-pressurised as instructed by the
installer.
NOTE: Some sealed systems do not require pre-pressurisation. If
this type of system has been used by your installer he will advise you
of any special maintenance that is required to ensure that the system
is always full of water.
Should any water leaks be found in the system or excessive
venting be required from any radiator, a service engineer should be
contacted and the system corrected.
OPEN VENTED HEATING SYSTEM
The appliance may be fitted to an open vented heating system
your installer will advise you. There is no need to check the pressure
gauge.
CLEARANCES
Your installer will have provided adequate space around the
appliance for safety and servicing. Do not restrict this space by the
addition of cupboards, shelves etc. close to the appliance.
Minimum clearances in millimetres.
GENERAL NOTES
BF Models OF Models RSF Models
Left-hand side 5 5 5
Right-hand side 5 70 5
In Front 600 600 600
Above 10 10 10
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