Air Supply Connections; Hydraulic Connections - Ariston 200 Mode D'emploi

Heat pump water heater - TECHNICAL INFORMATION FOR INSTALLERS

4.3 Air supply connections

Please bear in mind that using air from heated environments may hamper the building's thermal performance.
There is one connection for the air intake and one for the air exhaust on the rear side of the appliance. It is important to
not remove or tamper the two grilles.
The outlet air may reach temperatures that are 5-10°C lower compared to that of the inlet air and, if not ducted, the
temperature of the room of installation may drop sensibly. If the water heater is intended to function by externally (or
through another room) expelling or intaking the air processed by the heat pump, pipes specifically designed for the
passage of air may be used. Make sure that the pipes are securely connected and fixed to the product so as to avoid
any accidental detachments (for example, use suitable silicone). Do not in any way manipulate or break the air
intake/exhaust grilles.
Even if the product is not ducted it is advisable to install a curve in the suction line to prevent by-pass between the air
inlet and outlet (fig. 4).
In the case of product ducted with rigid tubes adopt during installation all the precautions necessary to ensure the
maintenance operations (fig.4)
WARNING: Do not use outdoor grills resulting in high losses, such as anti-insect grilles. The grids used should
allow good air flow, the distance between the inlet and outlet air should not be less than 26cm.
Protect pipes from the external wind. The expulsion of air in the chimney is allowed only if the draft is
appropriate, is also required periodic maintenance of the barrel, and chimney accessories.
The total static pressure loss due to installation is calculated by adding the loss of the single installed
components; this sum must be lower than the static pressure of the fan which is equal to (55 Pa).
See diagram on the last page.
WARNING! A type of canalization not suitable affects product performance and significantly
increases the heating time!
Figure 5 Inlet air: Not ducted / Outlet air: externally ducted
Figure 6 Inlet air: internally ducted / Outlet air: externally ducted
Figure 7 Inlet air: externally ducted / Outlet air: externally ducted
Figure 8 Installation without ducting

4.4 Hydraulic connections

Before using the product, we recommend filling its tank with water and draining it completely so as to remove the residual
impurities.
Connect the water heater inlet and outlet to pipes or pipe fittings that can withstand the operating pressure and
temperature of the hot water, which may reach 75°C. It is not advisable to use materials that cannot withstand such
temperatures. The dielectric union fitting (with joint supplied with the product) must be applied to the hot water outlet
pipe, prior to performing the connection.
Screw a "T" fitting identified by a blue collar onto the appliance's water inlet pipe. It is mandatory to screw on said fitting
a cock for draining the product with a tool on one side, and a suitable device against overpressure on the other side.
In countries which acknowledge EN 1487 It is mandatory to fit a safety valve onto the
appliance's water inlet pipe. The device must comply with the EN 1487:2002 standard
and must have a maximum pressure of 0.7 Mpa (7 bar). Moreover, it must at least
include the following components: a cut-off valve, a non-return valve, a control
mechanism for the non-return valve, a safety valve and a water pressure shut-off
device.
See Figure 9.
The accessory part codes are:
1/2" hydraulic safety device (for products with 1/2" diameter inlet pipe)  code 877084;
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3/4" hydraulic safety device (for products with 3/4" diameter inlet pipe)  code 877085;
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Syphon 1"  code 877086.
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Some countries may require the use of alternative safety devices, as required by local law; the installer must check
the suitability of the safety device he tends to use. Do not install any shut-off device (valve, cock, etc.) between the
safety device and the heater itself.
EXAMPLES
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