Equipment Description; Standard Delivery; Spare Parts - STIEBEL ELTRON SOKI plus Installation Installation

Operating instructions

1.1 Equipment description

The SOKI compact solar assembly enables
the simple installation of a solar heating
system and provides an optimum connection
between the solar collector array and the
solar buffer cylinder.
The compact solar assembly can be wall
mounted or can be installed on the cylinder
itself, with the SAS SOKI cylinder connection
set (part no. 22 04 63). SOKI comprises
all components required for the hydraulic
circuit. To minimise thermal losses, the SOKI is
equipped with EPP thermal insulation.
The pump assembly includes a thermometer
for flow and return, as well as an optical flow
meter. An integral non-return valve prevents
the undesirable thermo-siphon effect, i.e. the
solar buffer cylinder does not lose its heat
when the circulation pump is idle.
1.2 Applications
The compact solar assembly can be used with
single line lengths of up to 20 m and up to the
following number of collectors:
SOL 20 plus: up to 16 panels
SOL 23 plus: up to 16 panels
SOL 25 plus: up to 16 panels
SOL 27 plus: up to 16 panels

1.3 Standard delivery

● 1 x compact solar assembly SOKI plus
● 1 x hose ferrule with union nut for the fill
& drain valve 3/4" and sealing cap 3/4"
● Rawl plugs and fixing screws
● 1 x thermometer with threaded sleeve
1.4 Accessories
Cylinder connection set SAS SOKI
(22 04 63)
The SAS SOKI enables the installation of the
compact solar assembly on the cylinder itself.

1.5 Spare parts

● Insulation set (26 77 17)
● Pressure gauge (26 77 18)
● Flow thermometer (26 77 19)
● Ball valve w. gravity brake (26 77 20)
● Flow meter (26 77 21)
● Thermometer on the SOKI (26 77 22)
● Pump ST 20/6 (26 78 88)
(for users and contractors)
1.6 Specifi cation
Type
Part no.
Height
Width
Depth
Weight
Safety valve
Thermometer display range
Pressure gauge display range
Pump
Stages
Power consumption
Max permiss. pressure
Max. permiss. temperature
at peak times
Flow meter connection, top
Flow meter connection, bottom
Expansion vessel connection
Safety assembly connection
Fill and flush facility
Thermal insulation
Power supply
Flow meter
A
Pressure drop diagram
9
8
7
6
5
4
3
2
1
0
0 200 400
SOKI plus
22 04 58
mm 550
mm 200
mm 180
kg 5.1
bar 6
°C 0 to 160
bar 0 to 6
type ST 20/6-3 P
three-stage
44/63/82 W
bar 6
°C 120
°C 180
R 1" (
union nut
Rp ¾" (female thread)
Rp ¾" (male thread)
Rp ¾" (female thread)
provided
EPP (extruded polypropylen)
210 ... 250 V~
1 ... 13 l/min (standard)
ST 20/6
SOKI pressure drop
600 800 1000 1200
Volume flow [l/h]
)
88,2
78,4
68,6
58,8
49,0
39,2
29,4
19,6
9,8
0,0
1400 1600 1800
9