Product Description; Operating Principle - FLOWTECH flowpress Operation And Maintenance Manual

Required service
Storage transportation
Assembly, dissassembly, repairs, maintance.
Re- commissioning after adding or changing
components. Inspection.
First commissioning of configured control
unit (generic), re-commissioning after power
cut, operation (work on the terminal and
Flextronic control unit)
Electrical installation
Initial and re-inspection of electrical systems
Inspection before commissioning and
re-inspection of pressure equipment

Product Description

The Flowpress Direct is the most compact, wall-mounted, pressurisation unit in the portfolio. The
function of this pressurisation unit is to provide a means of automated water filling and top-up to
sealed heating and cooling systems. The equipment is designed to provide periodic water top-up to
compensate for minor losses in system pressure (e.g. slow leaks, air venting, etc.).
The Flowpress Direct is the latest in pumpless digital pressurisation technology for light commercial and
residential buildings. It's a slim, wall-mounted pumpless top-up pressurisation unit, with a top-up flow
rate of up to 14 l/min depending on the mains or boosted mains, water pressure. It is designed to be
connected directly to a building's incoming water supply using the included flexible hose. It is there to fill
and maintain the pressure of a heating or chilled water system without the need for a pump.
This equipment is not designed to cope with sudden, substantial, losses of system pressure (e.g.
manual draining) or major water losses (e.g. large leaks). The equipment is also not intended to be used
for water boosting (potable) applications.

Operating Principle

The following schematic shows the internal arrangement of the pressurisation unit:
1. Water enters the unit via the mains connection, isolation valve (IV) and through the back-flow
preventor.
2. Pressure sensors (P1 & P2) monitor the pressure in the mains water supply system and in the
heating or cooling system.
3. A solenoid inlet valve (S1) and a drain valve (S2) are activated when topping up is required.
4. The automatic air-vent (AAV) removes free air before it enters the sealed heating system.
5. Once the top up cycle is finished, the remaining water in the unit is removed by opening of the drain
valve (S2), to prevent legionella build up.
6. A filter on the mains supply to the unit is already installed. Where debris from the supply pipe is
expected, it is recommended to install an additional filter or Y-strainer on the mains water supply to
the unit.
Professional group
example
Logistics, transport,
warehousing
Installation and building
services
Electrical engineering
Installation and building
services engineering
performed in the context of
technical inspection
Relevant qualifications
example
Transport and warehousing
specialist
HVAC specialist
People with operations room
clearance with knowledge
gleaned from this guide.
Specialist in electrical
engineering/ installation
Qualified person (QP) with
certfication in Electrical
engineering.
Qualified person (QP)
8