User guide

5
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 CONTRA-
VENE THE REQUIREMENTS OF THE WATER SUPPLY REGULATIONS, BUILDING REGUALTIONS OR
LOCAL AUTHORITY REGULATIONS.
The boiler must be installed by a qualied, 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 ushed 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 sufcient ow rate of water to ensure
proper operation. Models 400 and 600 require a minimum ow of 6 litres/minute, and models 900, 1100
& 1200 require a minimum ow of 12 litres/minute. Insufcient ow 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
0
C. If the temperature across the boiler exceeds this then the ow rate is too low and will
potentially damage the boiler. Set the ow rate to give 5 - 10
0
C across the boiler on full heat.
The output FLOW pipe at the TOP of the boiler is identied RED. The input RETURN pipe is located at the
BOTTOM. Ensure that the direction of ow is correct through the boiler after installation. Set the pump on
maximum ow rate.
Pipework connections on all models are 22mm.
Use standard size pipework. DO NOT SOLDER DIRECTLY ONTO THE BOILER TAILS. Push-on or
compression ttings 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 t 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 oor 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 ow 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 ow
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 ow, 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 ow in any installation, to meet the required minimum
ow 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, tted with an automatic bypass valve, must be tted which meets the
required minimum ow 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 tted to all sealed systems. With open vented installations, ensure
there is a sufcient head of water for the pump to supply the full ow through the boiler of at least 1½ metres
between the bottom of the F & E tank and the top of the boiler.