Nibe 067 074, Руководство по установке, Страница: 15 / 48

Component positions
LE
K
2
3
4
EB1
PZ1
QM60
XL1
XL2
UB2
X1
QA41
QA3
QA2
FQ10
FC1
BT30
QA1
UB1
X2
Component list
Immersion heater EB1
Miniature circuit-breaker FC1
Temperature limiter FQ10
Terminal block, incoming X1
Terminal block X2
Contactor 4,0 kW (-K1) QA1
Contactor 7,0 kW (-K2) QA2
Contactor 15,0 kW (-K3) QA3
Contactor, overheat protection (-K4) QA41
Emergency mode thermostat BT30
Connection supply line, G 32 XL1
Connection return line, G 32 XL2
Cable gland UB1, UB2
Venting QM60
Rating plate PZ1
Designations according to standard EN 81346-2.
Pipe connections
GENERAL
The pipe installation must be carried out in accordance
with applicable standards.
A circulation pump must be used to ensure the flow
over the immersion heater. If the heating system valves
can close the circulation completely, the bypass valve
must be installed so that the flow through the electric
heater does not stop. In closed installations an approved
safety valve and pressure expansion vessel must be
used.
Caution
Also see the installer manual for your heat
pump/indoor module.
NOTE
The pipe work must be flushed before the
electric heater is connected, so that any con-
taminants do not damage the component parts.
DRAINING
The system is most easily drained by installing a drain-
age valve at the lowest point on the pipe installation.
The remaining water in ELK 26 is drained through the
return line connection (XL2), see "Component location"
on page
15 . If the return line connection on ELK 26 is
normally used for draining the unit, a drain valve can be
installed here.
PRESSURE DROP DIAGRAM ELK 26
Pressure drop
Flow (l/s)
0
0 0,1 0,2 0,3 0,4 1,1
1
2
3
4
6
(kPa)
(l/s)
0,5 0,6 0,7
5
1,0 0,9 0,8
(kPa)
15 ELK 26 | GB