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00U07352260-A_EN
AHP60-50/70 -
Installation, Use and Maintenance
7. MAINTENANCE OF THE OUTDOOR UNIT
7.1.
Drainage of the outdoor unit on the water side
If the unit has to be completely drained, first close the manual inlet and outlet valves (not supplied)
and then disconnect the pipes provided on the outside of the water inlet and outlet so that the
liquid contained in the unit can be evacuated (to make this easier, we suggest installing two drain
taps on the outside of the water inlet and outlet between the unit and the manual valves).
If it is necessary to recharge the system or
to adjust the glycol content, the service valve
may be used. Unscrew the plug of the service
valve and connect a 14 or 12 mm hose (inner
diameter - check the type of valve installed on
the unit) connected to the water mains, then
charge the system by unscrewing the special
ring. When the operation is complete, tighten
the ring and refit the plug. In all cases, we
recommend filling the system using an external
tap that has been fitted by the installer.
7.2. Filling the outdoor unit
Refer to paragraph 3.6.4
7.3.
Prolonged shutdown
The methods for powering down depend on the application site and the shutdown period
corresponding to the installation. If the appliance has a frost-free system, even when the appliance
is switched off (“Off” position of the system in the appliance).
If the system is due to be shut down for a long period, we recommend draining the hydraulic
system unless there is some glycol in the system
Switching off the appliance completely after draining the installation:
•
Switch off the appliances using the “OFF” switch on each one.
•
Close the water taps.
•
Switch the differential circuit breaker to “OFF”.
7.4. Periodic checks
Ring
Plug with seal
CAUTION:
The frost-free protection function remains active as long as the appliance
is switched on.
CAUTION:
If the temperature drops below zero, there is a serious risk of freezing:
use a mixture of water and glycol in the system, otherwise drain the heat
pump’s system and hydraulic circuits.