Viessmann AWO-M-AC 101.A06, Assembly And Servicing Instructions

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5.6.3 Handbook
If you need more information about the possible configurations, there is a handbook which is a technical
notebook including a series of system diagrams that have been highlighted regarding the installation
configuration of our high efficiency heat pumps. The Handbook is also intended to show the symbiosis
potential with some of our elements found in the catalogue.
Consult the technical notebook at our headquarters.
5.6.4 Condensation discharge system
All Vitocal 100-A units are built in such a way that the base of the unit acts as a condensate drip tray. A
plastic fitting is standard supplied to be connected below the base in the specific slot in order to connect a
pipe which channels the condensate.
Each unit is therefore fitted with a hole on the base of the hydronic kit (on the coil side) to drain
condensation which could drip from the pipes of the plumbing system. Since these pipes are well insulated,
a minimum amount of condensation is produced anyway and therefore it is not mandatory to connect a
drain pipe to this fitting.
5.6.5 Filling the system
CAUTION: supervise all filling/top-up operations.
CAUTION: before filling/topping up the system, disconnect power to the units.
CAUTION: the system must always be filled/topped up in controlled pressure conditions (max 1
bar). Make sure that a pressure reducer and safety valve have been installed on the filling/top-
up line.
CAUTION: the water on the filling/top-up line must be appropriately pre-filtered from any
impurities and suspended particles. Make sure that a removable cartridge filter and dirt
separator are installed on the line.
CAUTION: regularly check and vent the air built up in the system.
CAUTION: install an automatic air venting valve at the highest point of the system.
5.6.6 Discharge of the plant
If the unit needs to be drained completely, first close the manual inlet and outlet gate valves (not included
in supply) and then detach the pipes on the outside of the water inlet and outlet to drain liquid from the
unit (to make this operation easier, it is recommended to install two drain valves between the unit and
manual gate valves on the outside of the water inlet and outlet).
All in bottom panel of
outdoor unit
Gasket
Gasket
Drain fitting