Johnson Controls YORK YHMH 20 Notice D'instructions page 36

FILLING AND DRAINING THE INSTALLATION
FILLING
- Before filling, put the installation on/off switch to "off".
- Check that the drain tap is closed
- Remove unit cabinet as described in Maintenance section
- Open the air valve on the fan coil and the installation (see
figure)
- Start filling by slowly opening the installation water supply
tap outside the appliance
- When water starts to come out the air valve, close it imme-
diately and continue filling until the pressure gauge shows
the value envisaged for the installation.
Check the air valve for leaks.
Check all the joints for leaks.
It is recommended that this operation be repeated after
the appliance has been working for several hours and
that the installation pressure be checked periodically.
This operation must be carried out by specialised techni-
cal personnel.
DRAINING
- Before draining, put the installation on/off switch to "off".
- Check that the installation supply tap is closed.
- Open the fan coil and the installation air valve.
If anti-freeze has been put into the system, it must not be
allowed to drain away freely since it is a pollutant. It must
be collected and if possible recycled.
This operation must be carried out by specialised techni-
cal personnel.
14
GB
Installer
ON
OFF
ON
OFF