Installation Plumbing - Heatrae Sadia Amptec 95 022 001 C-400 Fitting Instructions And User Manual

INSTALLATION PLUMBING

IT IS THE INSTALLER’S RESPONSIBILITY TO ENSURE THAT THE INSTALLATION DOES NOT
CONTRAVENE THE REQUIREMENTS OF THE WATER SUPPLY REGULATIONS, BUILDING
REGUALTIONS OR LOCAL AUTHORITY 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. Models 400 and 600 require a minimum flow of 6 litres/minute, and models 900, 1100 &
1200 require a minimum flow of 12 litres/minute. Insufficient flow of water through the boiler will cause
nuisance trip outs. The maximum temperature differential between input and output of the boiler must not
exceed 14 C. If the temperature across the boiler exceeds this then the flow rate is too low and will
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potentially damage the boiler. Set the flow rate to give 5 - 10 C across the boiler on full heat.
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The output FLOW pipe at the TOP of the boiler is identified RED. The input RETURN pipe at the BOTTOM
is identified BLUE. 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 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 directly.
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.
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