Typical Water System Schematics - Riello Steel Pro Power 114-2 P Installation, Technical Assistance Service And System Management Manual

9
Before connecting the thermal module the protection plugs
must be removed from the delivery, return and condensate
drain pipes.
9
Before connecting the thermal module, it is necessary to
clean the system. This step is absolutely required when the
appliance replaces another one on pre-existing systems.
In order to carry out this cleaning activity, if the old generator is
still installed on the system, it is advisable to:
− add a de-scaling additive.
− Operate the system with the generator on for around 7
days.
− Discharge dirty system water and flush the system one or
more times with clean water.
2.7

Typical water system schematics

Block diagram 1: Circuit with thermal modules with their own circulator, connected in cascade.
SE
Depending
PC
PC Thermal module circulator
PB Storage cylinder circulator
PR DHW circulation pump
PI
System circulator (high temperature zone)
P2 Zone 2 circulator (low temperature)
P3 Zone 3 circulator (low temperature)
S2 Zone 2 sensor
S3 Zone 3 sensor
SB Boiler sensor
SE Outdoor sensor
If the system is very dirty, repeat the last procedure one more
time.
If the old generator is not present or available, use a pump to
circulate the water + additive through the system for about 10
days and perform a final washing as described in the previous
paragraph.
Once the cleaning has been completed, it is recommended to
add a suitable protective fluid to the system's water before in-
stalling the thermal module.
In order to clean the heat exchanger's built-in water system,
please contact Technical Assistance Service
0
0
ZM
P
SS
SS
V2
V3
ZM
EAF
UAC
25
Do not use incompatible liquid detergents, including acids
(for instance, chloridric acid and similar) in any concentra-
tion.
Do not subject the heat exchanger to cyclical pressure
changes because fatigue stress is very dangerous for the in-
tegrity of system components.
PB
PI
V2 P2 S2
M
V3 P3 S3
M
EAF
EAF
Primary sensor
Mixer valve zone 2
Mixer valve zone 3
Electronic device for zone management (accessory)
Domestic cold water inlet
Domestic hot water outlet
INSTALLATION
.
R
UAC
PR
SB