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2551868AB
First fill of apartment heating system
The ModuSat® unit is fitted with a pressure gauge that is mounted in the front panel. This gauge
reading should be used when filling the secondary circuit. An external filling loop should be used for
filling the secondary circuit with the mains cold water.
Open the isolation valves on the filling loop.
Cold fill should be done to about 1 bar. Pressure will depend on
the head of the system (difference between the lowest and
highest point).
Once the required pressure is reached, close the filling loop ball
valve, vent the system and if required repeat it again.
Disconnect filling loop.
Water treatment
The quality and cleanliness of the water within both the primary and secondary circuits is vitally
important to prevent damage to the ModuSat® components, and to ensure that the efficiency and
service life of the unit is maintained.
It is therefore necessary to fully flush and treat both primary and secondary circuits using suitable
water treatment chemicals.
Water treatment in accordance to these instructions.
Please confirm with the water treatment consultants that the chemicals used and
cleaning method statement complies with the requirements set out in this
section.
Water quality may damage the unit.
Poor water quality may damage the components used in the unit and invalidate
the warranty. The manufacturer cannot take responsibility for any damage of the
unit caused by poor water quality.
Chemical cleaning and dosing.
Chemical cleaning and dosing of the system should be in line with the current
regulations, standards and guidelines. Which are, but are not limited to:
BSRIA Application Guide BG29/2012
BS7593:2006
Requirements of Thames Water Utilities
The Water Industry Act 1991, Section 119
HSE The Control of Legionella 1991
HSC Approved Code of Practice and Guidance HSG274, Part 2
