22
4.3.
System details
4.3.1.
Central heating circuit
The boiler is designed for use in a sealed central heating system in accordance with the requirements of BS 5449 and BS 6798. The system
should be designed to operate with flow temperatures of up to 78 °C. When designing the system, the pump head, expansion vessel size, mean
radiator temperature, ect. must all be taken into account. Refer to the pump performance table for guidelines.
System volume: the expansion vessel incorporated into the boiler is suitable for a sealed heating system. The boiler is supplied with the
following components built in:
Pressure relief valve:
set to operate at 3 bars. The outlet connection of the boiler safety valve must terminate to atmosphere in
accordance with current regulations. The manufacturer will not be held responsible for flooding caused by the operation of the safety valve in
the case of system overpressure.
Pressure gauge: to indicates the system pressure to be maintained.
Expansion vessel:
capacity of 8 litres.
By-pass:
The boiler incorporates an automatic by-pass.
All circulating primary water systems will be subject to corrosion unless an appropriate water treatment is applied. This means that the
efficiency of the system will deteriorate as corrosion (sludge) accumulates within the system, risking damage to pump and valves, boiler noise
and circulation problems.
All systems must be thoroughly drained and flushed out. System additives - corrosion inhibitors and flushing agents/descalers should comply
to BS7593 requirements. It is important to check the inhibitor concentration after installation, system modification and at every service in
accordance with the manufacturer’s instructions.
4.3.2.
filling the central heating system
The system design pressure (cold) should be set to 1,5 bar. This pressure is equivalent to a static head of 15,4 metres of water.
Provision should be made to replace water lost from the system. This can be by manual or automatic means as shown in figs. 6 and 7. A double
check valve assembly must be used as show in pic 7.
Filling of the system must be carried out in a manner approved by the local Water authority. Where allowed the system may be filled via a
temporary connection as shown in pic 6. After filling, always disconnect the flexible hose of the filling loop. All fittings used in the system must
be able to withstand pressures up to 3 bar. Drain taps must be fitted at the lowest point of the system to allow the system to be completely
drained.
In order to prevent scaling or deposits in the primary heat exchanger, the mains supply water to the heating circuit must be
treated according to the requirements of standard.
This treatment is indispensable in the case where the circuit is frequently topped-up or when the system is often either
partially or fully drained.
4.3.3.
Domestic Hot Water Circuit
All DHW circuits, connections, fittings, etc. should be fully in accordance with relevant standards and water supply regulations.
Your attention is drawn for GB: Guidance G17 to G24 and recommendation R17 to R24 of the Water Regulations Guide.
4.4.
Site requirements
4.4.1.
Choosing where to install the boiler
The following must be taken into account when choosing where to install the boiler:
- Approved document L1 + L2 government guidelines.
- Check the wall is strong enough to support the weight of the boiler.
- Do not fit the boiler above any equipment that may affect operation (kitchen appliances that emit steam or greasy vapour, washing machines,
etc.).
- Do not install natural draught boilers in corrosive or very dusty atmosphere areas, such as hairdressing salons or laundries as this would greatly
reduce the boiler’s lifespan.
Mains water
supply
Additional
stop valve
Hose unions
CH return
Temporary hose
(disconnect after filling) Double check valve
assembly
(note direction of flow)
Mains
water
supply
Overflow
Stop
valve
Test
cock
Double
check valve
assembly
Heating
circuit
return
Feed cistern to be
located above
highest point in
the system
fig. 6
fig. 6b
Summary of Contents for Antea 24kW Range
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