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17
1 Safety summary & control device setting
17 SAFETY SUMMARY & CONTROL DEVICE SETTING
Protection:
This switch cut out the operation on the DHWT when the water temperature inside DHWT exceed 90ºC.
Cut-Out
Contactors
Current
Voltage
Coil Voltaje
Electric Power
Voltage
ø
Resistances whole fixing flare nut
Specific heat load
Material
Resistance cord
Sensor
DHWT sensor
18 GENERAL STANDARD FOR HYDRAULIC INSTALLATION
•
The safety valve unit will fitted at the sanitary water installa-
tion.
•
A pressure reducer must be placed in the DHWT installation.
The nominal pressure of the safety unit will be 8 bar.
•
When the main pressure is more than 6 bar a pressure redu-
cer should be installed.
•
The water discharge during heating (expansion) is normal.
The volume of this discharge can be up to 3% of the storage
tank's capacity.
•
The pressure regulator device must be working regularly, de-
pending on the quality of water, in order to remove the lime's
deposits and verify that it is not blockade.
•
A water leakage in the pressure protection device can exist.
The discharge pipe should be always open to the atmosphe-
re, free of frost and in continuous slope to the down side.
•
Dielectric bushes must be fitted at the input and output sani-
tary water and at the tank circuit connections.
•
Emptying the DHWT: Close the main inlet water valve and
open the relief valve of the security water group.
22
Model
Thermostat
Heating resistances
PMML0198A-rev.1 - 04/2011
Units
DHWT
Manual Reset
ºC
90
A
20 (AC1)
V
230V
V
207~253V
kW
2.5
V
230V
mm
8
"G
2 (brass)
W/cm
8
²
iNCOLLOY 825
Ni-Cr 80/20 ø 0.45mm
NTC 20k
Ref.
Main inlet water
DHWT inlet connection
Security valve and manual empty
Emptying connection
Check valve
Close valve
1
6
4
Name
2
5
3
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