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5.0 INSTALLATION PLUMBING
The installation must be carried out in accordance with the relevant requirements of:
The appropriate Building Regulations, either The Building Regulations, The Building Regulations (Scotland)
or Building Regulations (Northern Ireland)
The Water Fittings Regulations or Water Byelaws in Scotland.
IT IS THE INSTALLER'S RESPONSIBILITY TO ENSURE THAT THE INSTALLATION DOES NOT CONTRAVENE
THE REQUIREMENTS OF THE WATER SUPPLY REGULATIONS, BUILDING REGULATIONS OR LOCAL AU-
THORITY REGULATIONS.
The boiler must be installed by a qualified, competent tradesman who is aware of and will comply with
all relevant standards that are applicable: e.g. Building Regulations, the Local Authority Regulations, the
Water Supply Regulations and undertaking the relevant British Standards. The system must be flushed in
accordance with BS 7593 and in accordance with the supplied instructions and drawings to ensure proper
operation.
The boilers contain a very small amount of water, and so require a sufficient flow rate of water to ensure
proper operation. Insufficient flow of water through the boiler may cause nuisance trip outs. The maximum
temperature differential between input and output of the boiler must not exceed 14
C. If the temperature
0
across the boiler exceeds this then the flow rate is too low and will potentially damage the boiler. Set the
flow rate to give 5
0
C - 10
0
C across the boiler on full heat.
The output FLOW pipe at the TOP of the boiler is identified RED. The input RETURN pipe is located at the
BOTTOM. Ensure that the direction of flow is correct through the boiler after installation. Set the pump on
maximum flow rate.
Pipework connections on all models are 22mm.
Use standard size pipework. DO NOT SOLDER DIRECTLY ONTO THE BOILER TAILS. Push-on or
compression fittings are suitable for connecting directly onto the boiler tails. Fit a 22mm elbow to the top
of the boiler, and after 100 – 150mm of horizontal pipework on the positive pressure side of pump fit an
automatic air vent, or connect the expansion pipework on open vented systems to provide a route for air to
vent. DO NOT FIT THE AAV DIRECTLY ABOVE THE BOILER.
The Amptec boiler is suitable for operation in sealed or open vented systems. It is also suitable for schemes
such as heating only, W plan, S plan, zone heating, under floor heating, micro-bore via a manifold, etc. If you
are unsure about your application regarding suitability of the boiler please do not hesitate to contact your
local supplier or Heatrae Sadia specification team on 01603 420220.
The cost of installation can be reduced if the electric flow boiler is used for heating only. Use a direct type
cylinder with immersion elements and a time clock for the domestic hot water, then connect the electric
flow boiler directly to the heating circuit and control it by a programmable room thermostat. If the radiator
circuit has a continuously open route for the water flow then a bypass is not required. The boiler sizing is for
heating only in this case and does not have to be increased to allow for domestic hot water as well.
Ensure there is always an open route for the water to flow in any installation, to meet the required minimum
flow rate of the boilers and to allow for the pump over run. If an open route through the heating circuit can
not be guaranteed, then a bypass, fitted with an automatic bypass valve must be fitted, which meets the
required minimum flow rates for the boiler.
The bypass must have a minimum of either 2 metres of 22mm continuous pipework, or be routed through a
radiator with minimum dimensions of 600 x 600mm. Automatic pressure opening valves must be used with
the bypass circuit, ensure they are installed correctly as per the manufacturer's instructions. Gate valves are
not suitable. DO NOT FIT A VALVE BETWEEN THE BOILER AND THE SAFETY PRESSURE RELIEF VALVE OR
EXPANSION RELIEF SYSTEM.
The boilers are suitable for operating pressures up to 3 bar. Normal sealed systems operate at 1 to 1.5 bar.
Ensure a safety pressure relief valve is fitted to all sealed systems. With open vented installations, ensure
there is a sufficient head of water for the pump to supply the full flow through the boiler of at least 1½ Metres
between the bottom of the F & E tank and the top of the boiler.
6
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