Heatrae Sadia FBM 25 ECO 3KW, Инструкция по установке, эксплуатации и обслуживанию, Страница: 9 / 40

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4. Description of the product
4.1 General description
These water heaters are a series of wall mounted units
that store and produce domestic hot water efficiently.
These vented units (unpressurized) mount securely
to the wall. Where required additional pressure safety
components may be added.
There are four models in the range:
`
FBM 25 ECO
`
FBM 45 ECO
`
FBM 70 ECO
`
FBM 120 ECO
The unit is supplied complete with safety and control
devices needed to allow connection to the cold water
supply where the pressure is below 10 bar. All these
components are preset and should not be tampered
with. The units' hot and cold pipes are situated so as
to provide ease of installation. The unit also has a
breather connection at the top that provides a visual
indication, via the tundish supplied, of overfilling should
the unit fail. This must be vented to a suitable and safe
location, preferably an outside wall.
4.2 Operation principle
All the unit sizes produce DHW in the same way, by
heating the potable water volume via an immersion
heater. The hot water temperature programmed in the
unit is factory set to 60 degrees centigrade, but can
be adjusted to suit the installation requirements via the
digital interface panel.
4.2.1 Temperature Control
The temperature of the stored water can be adjusted
between 38 degrees centigrade and 78 degrees
centigrade, this is achieved by selecting manual
mode on the digital interface and then selecting the
temperature required using the temperature buttons,
up and down as shown on page 20.
4.2.2 Water inlet control
When hot water is drawn from the water heater, the unit
will detect a change in water level automatically and
request refill via a solenoid valve. The flow of potable
water is controlled via a flow restrictor, this ensures that
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4
5
6
7
8
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14
15
16
17
Number Part description
1 Product bracket
2 Breather gasket
3 Level sensor assembly
4 Sensor cover
5 Tank assembly
6 LCD screen cover
7 LCD board and display
8 Main electronic control
9 Base cover
10 22mm hot outlet pipe
11 15mm water inlet (push fit elbow)
12 Fixing bracket
13 Drain valve
14 Power cable clamp assembly
15 Inlet assembly
16 Immersion heater
17 Wall bracket
Figure 4: Main components diagram
Table 4: Main components list