Standard Installation For The Qualified Installer; General Installation Information; Place Of Installation; Equipment Preparation For Installation - STIEBEL ELTRON DEL 18 SL i 25A Operating And Installation Instructions

3. Standard installation
Electro: UP – bottom; Water: UP
Legend Diagram A - G
1 User interface
2 Equipment cap
3 Base, back wall
4 DHW compression fitting
5 Cold water compression fitting
(three-way shut-off valve)
6 Cable grommet (electrical supply cable
from below)
7 Mains terminal
8 Top, back wall
9 Electronics
10 Safety pressure limiter (AE 3) with reset
button
11 Heating system
12 Flow sensor (DFE)
13 Plug position of thermostat fly lead cable
14 LED for operating and fault display
15 Fixing bar
16 Plug of thermostat fly lead cable
17 Safety thermal cut-out (STB)
18 Outlet sensor (NTC)
19 Locating hook for mounting rack (Service)
20 Unit rating plate
21 Hanging bracket
22 Filter in cold water screw connection
23 Flow rate limiter (DMB)
24 Form disc
3.1 General installation
information
The equipment is prepared at the factory for
standard installation (see figs. C - I ):
• Installation above a worktop C (a).
• Water connection, unfinished walls, com-
pression fitting G (4 and 5).
• Electrical connection, unfinished walls, in
the lower equipment area F (6).
• Output 21 kW for the
DEL 18/21/24 SLi.
3.2

Place of installation

Install the DEL ... vertically in accordance with
C (a – above or b – below worktop) in a
room free from the risk of frost.
3.3 Equipment preparation for
installation
• Open the equipment D :
a Pull the flap forward.
b Open the flap downwards.
c Release the fixing screws.
d Remove the equipment cap.
• Remove the back wall base E :
a Press down both snap-in tabs.
b Remove the back wall base by pulling
forwards.
• Remove the fixing toggle F (15).
3.4 Securing the mounting bra-
cket
F
• Mark out the fixing holes for the mounting
bracket using the installation template
supplied.
• Secure the mounting bracket with 2
screws and rawl plugs (not supplied;
selection subject to the material of the
relevant wall).
20
for the qualified installer
3.5 Trimming the power cable
to size
Trim the power cable to size in accordance
with H .
Note: Cap (a) should be used as an aid for
installing the power cable.
3.6 Equipment installation
• Route the power cable through the cable
grommet (6) and press the back wall over
the threaded studs of the mounting bracket.
• Fit the equipment, secure the fixing toggle
(15).
3.7 Water connection
Important instructions:
Thoroughly flush cold water supply
!
line!
The filter supplied (22) must always be fitted
with the flow rate limiter (23, DMB) or the
form disc (24) (parts in the bag on the CW
connection and in the accompanying pack) in
the CW screw connection. Generally the DMB
- 12 l/min (brown) is to be installed.
Exception:

3.10 Initial start-up

(only by a qualified contractor)
1
Fill and vent the equipment. Please note:
risk of running dry! Open and close all
connected draw-off valves several times,
until the air has been purged from the
pipework and the equipment, see "2.2
Important information".
2
Activate the safety pressure limiter.
The DEL...is supplied with the safety
pressure limiter (AE 3) in a tripped state
(press the reset button).
3
Push set value transducer cable plug
onto the PCB.
4
Fit the equipment cap and secure with
the screw.
5
Switch on the mains power.
6
Check the instantaneous water heater
function.
7
Remove the protective film from the
user interface.
Equipment handover
Explain the equipment function to the user
and familiarise the user with its operation.
Important information:
• Make the user aware of possible dangers
(scalding).
• Hand over these instructions to the user
for safekeeping.
– DMB - 7.5 l/min (blue) for use with a ther-
mostatic fitting.
– Form disc for low water pipe pressure.
Upon replacement installation the presen-
ce of the filter must be checked.
Never use the three-way shut-off valve (5) to
reduce the flow rate.
F
3.8

Electrical connection

Connect the electrical supply cable to the ter-
minal strip (see Wiring diagram I ).
Important information:
The protection level IP 25 (hose-proof)
!
G
can only be ensured with a correctly
fitted cable grommet A (6) and seal on the
cable bush.
Connect the equipment to earth.
3.9

Completing the installation

1. Open the three-way shut-off valve G (5).
2. Fit the back wall base E .
1
3
4
5
2