SYSHRW – Installation Operation Manual (IOM HRW 03 N 13GB)

English
40mm
40mm
2%mini
INTERCONNECTED CONVEYANCES
Return conveyance
Supply conveyance
Rubber
hose
Main
circuits
14 SysHrw
5. Each unit must be equipped with isolation valves on the water inlet and outlet pipes. The return
isolation valve is used for both cutting off the water supply and balancing the installation’s water
ow. As it is used to establish the balance of the ows, it must be equipped with a lockable position
end stop. This end stop ensures that, after the valve is closed, it can only be re-opened as far as the
position required to maintain a balanced water ow.
6. Never connect a unit to the water supply and return lines without completely cleaning and
flushing out the hydraulic loop beforehand. After performing these operations, the
units must be connected, with all valves completely open, ready for the system to be
lled with water.
COMMENT: In order to limit clogging the plate heat exchanger and to optimise unit
operation, it is advisable to equip the system with a sieve lter (Ø 0.8 mm) on the unit
water inlet pipe work. This lter should be installed between two isolation valves and
should remain accessible to the user for periodic checks.
7. Use steel, copper or P.V.C. pipes for the condensates drainage pipe. Each unit is supplied with a
connector for condensates drainage.
8. The condensates drainage line must
comprise a siphon and run from
the unit on a downward slope of
at least 2%. Generally, the siphon
is connected directly to the unit’s
condensates drainage outlet. A length
of plastic pipe can be used between
the siphon and the condensates
drainage line.
A complete condensates drainage
system with copper or P.V.C. pipe can
also be used.
Screw-on connectors shall be tted
to facilitate drainage pipe removal if
copper pipe is used for the drainage
pipe work.
9. No point of the condensates drainage pipe work should be located above the level of one of the
units’ condensate drainage outlet connection.
10. The circuits’ high points must be bled of air.
11. Comply with current regulations in terms of dielectric isolation of the connectors and the pipe
work.
12.2. RECOMMENDATIONS FOR CLEANING AND FLUSHING OUT THE SYSTEM
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.