5 | Installation
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M2050222_en | Installation instructions Lambdamat LM 1500 KOM
▪ The diaphragm pressurised expansion tank must conform to EN 13831 and hold at least
the maximum expansion volume of the heated water in the system, including a water
seal
▪ Its size must comply with the design information in EN 12828 - Appendix D
▪ Ideally it should be installed in the return line. Follow the manufacturer’s installation
instructions
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We recommend installing some sort of monitoring device (such as a thermometer)
5.8.2 Thermal discharge safety device with zone valve
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Install the 2-way zone valve (A) in the fresh water pipe between the thermal discharge
safety device (B) and the boiler’s safety heat exchanger (C)
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Fit the 2-way zone valve (A) with the supplied double nipple directly to the
discharge safety device (B). The remaining pipework is to be provided by the
customer.
IMPORTANT: Pay attention to the flow direction of the discharge safety device (B)!
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Remove the stop from the rotary drive
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The stop is no longer required
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Place the rotary drive on the zone valve in such a way that the flat area of the pin fits
into the drive housing
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Turn the rotary drive clockwise by approx. 90° until both torque supports (E) of the
drive match the bores (F) on the zone valve
