Hitachi DHWT200E-2.5H1E, Инструкция по установке и эксплуатации

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22 PMML0198A-rev.1 - 04/2011
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.
Model Units DHWT
Thermostat Manual Reset
Cut-Out ºC 90
Contactors
Current A 20 (AC1)
Voltage V 230V
Coil Voltaje V 207~253V
Heating resistances
Electric Power kW 2.5
Voltage V 230V
ø mm 8
Resistances whole fixing flare nut “G 2 (brass)
Specific heat load W/cm
²
8
Material iNCOLLOY 825
Resistance cord Ni-Cr 80/20 ø 0.45mm
Sensor
NTC 20k
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.
Ref. Name

Main inlet water

DHWT inlet connection

Security valve and manual empty

Emptying connection

Check valve

Close valve
1
6
4
3
5
2
17