STIEBEL ELTRON DHA 4/8 L Gebrauchs- Und Montageanweisung Seite 9

2.5 Installation location
The instantaneous water heater
should be installed in an enclosed
frost-free area, if possible close to the dra-
wing-off point (when dismantled, the unit is
to be stored in a place not subject to frost,
because there will always be some residual
water left inside). The unit is to be installed
vertically, as in Example
mounting, or for concealed mounting.
2.6 Installing the unit
Preparation
1
1
Remove the unit cover.
2
Position the unit, determine where the
2
1a
securing hole is to be and drill it, then in-
1
3
3
1b
sert the securing screw (ensure insertion
2
depth is sufficient).
4
4
2a
3
Cut the electrical connection to length
5
5
2b
and strip off the insulation..
4
6
3a 6 In cases of surface-fitted electrical connec- 4a
5 tions, the rear wall must be pierced at the
7
3b 7 4b
appropriate place.
1a
6
1a
8
5a
8
Cold water pipes must be thoroughly
1a
1b
7
1b
9
flushed through. Water connections
5b
9
1b
2a
must be provided with conventional com-
2a 8
1a
10
6a 7a
10
mercial pressure fittings.
2a
2b
2b 9
1b
11
Pierce holes for water connections: 6b 7b
11
2b
3a 4a
Concealed connection
3a 4a
10
2a
12
8a
12
3a 4a
3b 4b Surface connection
3b 4b
11
2b
13
8b
13
3b 4b
5a
5a Install water connection:
12
3a 4a
14
9a
14
5a Concealed connection:
5b
5b
13
3b 4b
Screw the connection nipple into the wa-
15
9b
15
5b
6a 7a
ter installation (ensure position and instal-
6a 7a
14
5a
16
10a
16
lation depth are correct).
6a 7a
6b 7b
6b 7b
15
5b Surface connection:
17
10b
17
6b 7b
8a
Screw the connection nipple with the flat
8a
16
6a 7a
18
seal to the pipe bend in the unit.
18
8a
8b
8b
17
6b 7b
Feed the electrical connection cable through
19
19
8b
9a
the rear wall and the cable aperture, guide
9a
18 8a
20
20
the unit onto the securing screw and over the
9a
9b
9b
19 8b
connection nipple, and slide it downwards.
21
21
9b
10a
Fit the water connection components with
10a
20 9a
22
the seal:
22
10a
10b
10b
9b
21
23
23
10b
22
10a
24
24
Table 3: Fault recovery by the qualified installer
10b 23
Fault
24
Differential pressure switch
does not switch the heating
on despite the hot water
valve being fully opened.
Unit does not supply any hot
water despite the sound
being audible of the
differential pressure switch
turning on.
Overheating light displayed.
2
3b 4b
3
5a
4
5b
1a
5
Concealed fitting
6a 7a
1b
Level and tighten the unit (14).
6
6b 7b
2a
2.7 Electrical connection
7
8a
2b
17 Terminal strip for electrical connection
8
18 Terminal bridges for basic power rating 8b
3a 4a
8,8 kW
9
9a
3b 4b
19 Terminal bridge for basic power rating
10
6,6 kW
9b
for surface
5a
20 Terminal bridge for basic power rating
11
10a
5b
4,4 kW
12
10b
6a 7a
13
1
The cable bushing must be used to
6b 7b
provide protection against the pene-
14
2
8a
tration of water.
15
3
8b
Connect the fixed lead for the electrical con-
16
nection in accordance with the circuit diagram.
4
9a
Mark the connected load according to the
17
5
9b electrical connection with a cross on the
unit rating plate and in Table 1 with the aid of
18
6
10a
a ballpoint pen.
19
7
10b
Conclude installation:
20
8
Fit the unit cover on and secure it with
1 screws.
21
9
2
22
2.8 First start-up
10
3
(only to be carried out by a qualified installer)
23
11
4
Before screwing the fuses in or
24
12
switching them on, all the hot water
5
valves connected are to be kept open until
13
the pipe network and the unit are free of
6
14
air. Check that the small instantaneous wa-
7
ter heater is functioning properly.
15
8
16
Adjusting the flow rate
9
If the desired temperature is not being
17
reached, the flow rate can be changed by
10
means of the adjustment screw (8).
18
11
Handing over the unit
19
Explain the function of the unit to the users,
12
20
and familiarise them with its use. Draw atten-
13
tion to possible risks (scalding), and hand over
21
these instructions; these are to be kept in a
14
22
safe place.
15
23
16
24
17
18
Cause
19
The water flow rate of > 3,0 l/min. required for
switching on is not being attained.
20
Dirt contamination or limescale formation in the
21
flow regulator in the fitting or the shower head.
Filter in the differential pressure switch clogged.
22
Flow rate too low.
23
The safety thermal cut-out has disconnected the
24
unit for safety reasons.
Heating system clogged with limescale (safety
thermal cut-out actuated by the heat build-up).
Heating system is defective.
Flow rate too low.
Inlet temperature too high.
5a
5b
6a 7a
2.9 Servicing instructions
Surface fitting
6b 7b
8a
8b
– Clean the filter (15)
Release the earthing screw
9a
connection pipe in the differential pressure
9b
switch
downwards
10a
ble in the reverse order.
Make absolutely sure the earthing screw is
10b
tightened up again!
– Activate the safety thermal cut-out:
The actuated safety thermal cut-out can be
reactivated after a fault has been rectified
by means of the reset push button (16).
2.10 Trouble-shooting
See Table 3.
3. Guarantee
For guarantees please refer to the respecti-
ve terms and conditions of supply for your
country.
should be carried out by a qualified instal-
ler.
The company does not accept liability
for failure of any goods supplied which
have not been installed and operated in
accordance with the manufacturer's
instructions.
Recycling of obselete appliances
disposed off according to local regulations.
Rectification
Cleaning or descaling the flow regulator in the fitting or the sho-
wer head.
Clean the filter (15) after closing off the cold water line.
Correct the flow rate setting
Rectify the cause of the problem, then press the reset button on
the safety thermal cut-out (16) (with the unit disconnected from
the mains).
Replace the heating system.
Replace the heating system.
Correct flow rate adjustment
Limit cold water intake to 25 °C.
When carrying out any work, discon-
nect the unit from the mains.
, rotate the
through 90°, and remove it
. Clean the filter. Reassem-
The installation, electrical connection
and first operation of this appliance
4. Environment and
Recycling
Appliances with this label must not be
disposed off with the general waste.
They must be collected separately and
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