| 1.3.1-Fresh water circuit connections Follow the installation schematic, with particular regard to the sense and position of components. Keep in mind the accessibility of components for the following steps of installation and also for maintenance. Respect the flow sense marked on the unit. Keep accessible the purging valve installed on the fresh water return. Respect the nominal diameters of the manifold. Manifold: install it in an accessible position, if possible with a certain heel (purging valve higher). Check that each calibrating valve (if installed) of the manifold is fully open. Expansion tank: respect the schematic. Connecting port must be upwards to drain out of it. Fresh water pump: respect the layout schematic. Fresh water circuit keep in mind that the easiest and shortest is the best. Theoretically any "high" point in the circuit must have a purging valve. Siphoning and "up-and-down" must be avoided as anyway they make the air purging difficult and trap air. Fan coil: respect the flow sense. Each fan coil is equipped with a purging valve that must be accessible both at installation and also for maintenance. The FC type fan coils should be installed with a " backwards " heeling. 1.3.2- Automatic air-bleeder This device makes much simpler both the bleeding of the new system and the following routine maintenance. It must be installed vertically on the outlet of the fresh water pump. Thie automatic air-bleeder, once the fresh water pump is primed, bleeds any air which has been trapped inside the circuit automatically. It will be necessary only to bleed the fan coils installed in the highest position as all the remaining air will be bled automatically by this device. 1.3,3 - Safety Flow switch This item is installed on the fresh water manifold. It must be accessible for maintenance and calibration. The flow switch is needed as a safety device which cuts out the compressor if the fresh water circulation stops or is not enough. The flow switch must be electrically connected to the electrical box (two wires cable), as specified in the electrical schematic. The commissioning will test that this safety by simulating a reduction of the fresh water flaw. 1.3.4- Pressurizing the fresh water circuit The gauge set installed in the fresh water circuit is equipped with two charging ports each ( H -H1) with a manual valve and an automatic check valve, which prevents the internal charge to come back to the pressurized sanitary water circuit in case of mistake. Use one of the two valves to charge and pressurize the circuit with fresh water up to 1.5 Bars checking it with the pressure gauge. This port must be permanently connected to the boat yachts sanitary water system, preferably thru an additional manual valve. MODUL_GB_20H7.doc page 10 of 28 10/04/07 |