IOM SYSLOOP (IOM SL 01 S 3GB)

English
Main return pipe work
Main water supply pipe work
Spherical
dome valve
INTERCONNECTED CONVEYANCES
Rubber hose
18 SYSLOOP
1. Before commissioning an appliance for the rst time, the water loop must be cleaned and rinsed out
to remove any dirt and manufacturing debris.
If the appliances are equipped with isolation valves (either electric or pressostatic), the water
supply and return conveyance circuits to and from
each machine must be connected to each other. This
will avoid any dirt being introduced into the units.
Flushing water through the units is acceptable if they
are not equipped with water ow control devices.
2. The system must be lled from the mains water supply.
All air bleeds must be open during lling. Close the air
bleeds once the system is lled.
The installer must start the main circulation pump with
the water top-up tap on the pressure reduction valve
in the open position. Check the air bleeds by increasing
order of height to ensure water ows freely throughout
the entire system.
Power supply to the cooling tower must be shut down,
and the water loop temperature regulation thermostat
must be set at 27 °C.
As the water circulates through the system, the installer
must seek out and repair any possible pipe work leaks.
The drain cocks, on the lowest points on the circuit,
must be open for ushing out and chasing out any impurities. Ensure that the mains water valves are
adjusted to allow water to enter at the same speed as it exits. Check the pump inlet pressure gauge
and manually adjust the compensating valve to maintain the same pressure before and after the
opening of the drain taps. Flushing must be performed for at least two hours, or longer if necessary,
until clear and clean water is obtained at the drain taps.
3. Stop the additional heating and the water circulation pump. Open all the bleed points and the drain
taps to empty the system completely. The short-circuited water supplies and returns must now be
connected to the units’ inlet and outlet connections. It is recommended to use Teon tape on the
pipe connector threads. Do not use sealing paste on the hoses’ rotating connecters.
4. Formerly, sodium tri-phosphate used to be recommended as a cleaning agent for ushing.
However, nowadays numerous countries forbid the introduction of phosphates into their wastewater
networks. Therefore, it is now recommended that the system is ushed out with hot water (30 °C).
5. Fill the system again with clean water. Test the water acidity level (litmus paper), and treat as
required to obtain a slightly alkaline water quality.
At this stage, the recommended percentage of anti-freeze can be added. Use commercial quality
anti-freeze specically intended for air conditioning systems. Do not use automobile radiator anti-
freeze.
6. On the main electrical cabinet, adjust the heater set temperature point at 20 °C and the cooling
tower set temperature at 30 °C. Connect the power supply to all motors and start the circulation
pumps.
When the normal ow level has been reached through all components, including the cooler (irrespective
of the season) and when the air is bled form the system and the loop temperature has stabilised, each
appliance is ready to be checked, tested and started for balancing the air and water ows.
13.3. RECOMMENDATIONS FOR CLEANING AND FLUSHING OUT THE SYSTEM