Installation, user and maintenance manual
– GAHP-A
25
If you wish to disconnect the appliance during the winter, one of the following two con-
ditions must be met:
make sure that the hydraulic plant connected to the appliance contains an ad-
1.
equate percentage of glycol antifreeze (see Paragraph 5.6 FILLING OF HYDRAULIC
CIRCUIT
→
34 and Table 5.3 Technical data for filling the hydraulic circuit
→
36);
activate the antifreeze function, which runs the circulation pumps and the appli-
2.
ance when water temperature is below 4°C or in case the outdoor temperature is
lower than 2 °C. To do this, contact your installer. This function requires the appli-
ance to be ALWAYS powered up (electricity and gas) and power failures excluded.
otherwise the manufacturer declines all contractual and extra-contractual li-
ability for consequent damage�
Connecting the appliance before it is used again (to be carried out by the instal ler)
Before starting this procedure, the hydraulic system installation technician must:
ascertain whether the appliance requires any maintenance operations (con-
•
tact your authorised Robur Technical Assistance Centre or consult Paragraph 7.2
MAINTENANCE
→
73);
check that the water content of the plant is correct; if necessary, top up the cir-
•
cuit to at least the minimum quantity (see Paragraph 5.6 FILLING OF HYDRAULIC
CIRCUIT
→
34);
if necessary add, to the water of the system (free of impurities), inhibited monoeth-
•
ylene glycol antifreeze in a quantity in proportion to the MINIMUM winter temper-
ature in the area of installation (see Table 5.3 Technical data for filling the hydraulic
circuit
→
36);
bring the plant to the correct pressure, making sure that the pressure of the water
•
in the plant is not less than 1 bar and not over 2 bar;
In case of winter saesonal switch-off or long period of stopping, we suggest to not emp-
ty the hydraulic circuit: in that case possible oxidation process can occur.This oxidation
process could damage both the hydraulic system and also the Robur heat pump.It’s im-
portant to verify that no leakages occur in the hydraulic circuit that may empty part of
the system. The above recommendation is necessary in order to avoid to fill continuously
with water that may imply the additional introduction of oxygen and the consequent
dilution of the used inhibitor, for ex glycol. In case of precence of glycol, Robur advices to
use inhibited glycol. Galvanized pipes are not recommended, as they are not compatible
with glycol.
You will need: the appliance disconnected from the electricity/gas supply
open the plant gas supply valve to the appliance and make sure that there is no
1.
smell of gas (indicating possible leaks);
if you smell gas, close the gas valve again immediately without operating any other
electrical device and, from a safe place, request the assistance of professionally qualified
personnel.
If no smell of gas is detected, connect the appliance to the electricity supply mains
2.
via the external circuit breaker provided by the installation technician in the ap-
propriate panel (set the "GS" circuit breaker to the "ON" position, see Figure 6.7
Electrical wiring diagram
→
47);
power up the CCP (if present) or DDC (if present);
3.
