4 Dimensioning and planning
8
99640x6xx-mub-de – V08
2016/07
4
Dimensioning and planning
The FriwaMidi and FriwaMaxi are domestic hot water modules which heat potable
water operating on the principle of a flow-type water heater.
The FriwaMidi and FriwaMaxi can only work flawlessly if the installation meets certain
requirements. Please take some time to plan the installation.
WARNING
Danger of scalding due to hot water!
Undesirable circulation of water in the primary circuit can cause the exit of
water of up to 90 °C at the withdrawal point.
External pumps must not be installed between the domestic hot water
module and the buffer tank.
The domestic hot water module must not be connected to a distribution
manifold.
Mounting example
FriwaMidi with optional circulation set (item no. 640412) and with optional return distribution
(FriwaMidi: item no. 640423, FriwaMaxi: item no. 640424)
Safety group
according to DIN 1988
