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Installation
To avoid heat loss and improve appliance efficiency:
B Insulate all water connections.
1)
Safety valve
B Install a safety valve at the appliance's cold water inlet.
If the water inlet pressure is higher than 8 bar - 80% the
allowable maximum value (10 bar) -, install a check
valve. The safety valve is controlled as soon as the water
pressure in the appliance is more than 10 bar. In this
case it must be possible to divert the drain to a container.
NEVER SEAL OFF THE SAFETY VALVE'S DRAIN. Do not
install any accessories between the safety valve and the
appliance's cold water inlet.
NOTICE:
The safety valve drain tube must be installed in a frost
free environment and downwards oriented.
5.5
Connection for the internal indirect coil
The appliance is equipped with an internal indirect coil for backup
heating from solar thermal or central heating systems.
If DHW temperature in the tank reaches 80 °C, the external controller
must switch off the backup circuit. This is to prevent damage to the heat
pump's refrigerant circuit or failure of the safety temperature limiter.
WARNING: Danger of scalding!
Hot water can cause serious scalding.
B Warn occupants of risk of scalding.
B Install a thermostatic mixing valve to limit the hot
water outlet temperature.
If the internal indirect coil is not used:
B Do not remove the plugs from the internal indirect coil's inlet and
outlet apertures.
DHW temperature sensor in the storage tank
B Install DHW temperature sensor in the correct pipe (
B Insulate the pipe to prevent heat loss.
5.6
DHW circulation
With regard to the output, DHW circulation should only be used when it
is really needed. To avoid heat loss through a circulation system
connected to the DHW distributor system, this system must be
controlled using a valve or a similar device.
Heat recovering time will be higher when using a
recirculating system.
5.7
Condensate hose connection
The condensate is drained on the rear side of the appliance.
B Connect the condensate hose
to allow the condensate to drain freely.
B Drain condensate via an outlet siphon (Fig. 14, [2]).
1) Accessory not included in standard delivery
16
Fig. 3, [4]).
1)
to the condensate drain (Fig. 14, [1])
6720646160-26.1V
Fig. 14 Condensate drain
[1]
Condensate drain
[2]
Outlet siphon
5.8
Expansion vessel (accessories not included in
1)
standard delivery)
To prevent water loss from the safety valve, a DHW
expansion vessel can be installed.
B Install the expansion vessel at the cold water connection between the
storage tank and the safety assembly.
Table 6 serves as a reference for the selection of the expansion vessel.
The capacity of the expansion vessel must be selected subject to the
water pressure in the system. Details refer to a storage tank temperature
of 60 °C.
Safety valve
Storage
(max.
tank type
pressure)
6 bar
HP 270...
8 bar
10 bar
Table 6
5.9
Filling the storage tank
NOTICE: Damage to the appliance!
B Prior to commissioning the appliance, fill the storage
tank with water and ventilate it.
1
2
Capacity of the
expansion vessel
Water
corresponding to the
pressure in
switch-on pressure of
the system
the safety valve
2
12 l
3
18 l
4
25 l
2
12 l
3
12 l
4
18 l
2
12 l
3
12 l
4
18 l
SUPRAECO W – 6 720 646 161 (2012/04)
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