STIEBEL ELTRON HDB-E 21 Si - Maintenance; Dimensions and Connections; Wiring Diagram

ENGLISH
www.stiebel-eltron.com HDB-E Si | 29
INSTALLATION
Maintenance
14. Maintenance
WARNING Electrocution
Before any work on the appliance. disconnect all poles
from the power supply.
Draining the appliance
You can drain the appliance for maintenance work or to protect
it from frost.
CAUTION Scalding
Hot water may escape when draining the appliance.
 Close the shut-off valve in the cold water supply line.
 Open all draw-off valves.
 Undo the water connections on the appliance.
 Store the dismantled appliance in a room free from the risk
of frost. as water residues remaining inside the appliance can
freeze and cause damage.
15. Specification
15.1 Dimensions and connections
b02
c01c06
470
100
414
40
11720225
140
35
368
30
338
47
b03
35
D0000023609
b02 Entry electrical cables I
b03 Entry electrical cables II
c01 Cold water inlet Male thread G 1/2 A
c06 DHW outlet Male thread G 1/2 A
15.2 Wiring diagram
3/PE ~ 380 - 415 V
85�02�02�0005
1 Bare wire heating system
2 High limit safety cut-out
3 Safety pressure limiter
Priority control with load shedding relay (LR 1-A)
See also chapter “Appliance description / Accessories”.
85�02�02�0003�
2
1
1 Control cable to the contactor of the second appliance (e.g.
electric storage heater).
2 Control contact opens when switching the instantaneous
water heater on.