Safety Summary & Control Device Setting; General Standard For Hydraulic Installation - Hitachi DHWT-200S-3.0H2E Manual De Instrucciones

SAFETY SUMMARY & CONTROL DEVICE SETTING
10 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
Electric Power
Voltage
Ø
Resistances whole fixing flare nut
Specific heat load
Material
Resistance cord
DHWT sensor

11 GENERAL STANDARD FOR HYDRAULIC INSTALLATION

• The safety valve unit will fitted at the sanitary water
installation.
• 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
reducer 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,
depending 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
atmosphere, free of frost and in continuous slope to the
down side.
• Dielectric bushes must be fitted at the input and output
sanitary 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.
11 PMML0347B rev.1 - 06/2016
Model
Thermostat
Heating resistances
Units DHWT
Manual Reset
ºC 90
A 20 (AC1)
V 230V
kW 3.0
V 230V
mm 6.4
"G 1-1/4"
W/cm 14.2
²
INCOLOY 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