Important Notice; Model Description - Hitachi DHWT Serie Manuel D'installation Et De Fonctionnement

4

1 Important notice

4 IMPORTANT NOTICE
• Verify in accordance with the manual that all the information
required for the correct installation of the system is included. If
this is not the case, contact your distributor.
• HITACHI pursues a policy of continuing improvement in de-
sign and performance of products. The right is therefore re-
served to vary specifications without notice.
• HITACHI cannot anticipate every possible circumstance that
might involve a potential hazard.
• This DHWT has been designed for standard water heating for
human beings only. Do not use this for other purposes such
as for drying clothes, heating foods or for any other heating
process.
• No part of this manual should be reproduced without written
permission.
• If you have any questions, contact your service contractor of
HITACHI.
• Check and make sure that the explanations of each part of
this manual correspond to your DHWT model.
• Signal words (DANGER, WARNING and CAUTION) are used
to identify levels of hazard seriousness. Definitions for iden-
tifying hazard levels are provided below with their respective
signal words.
• It is assumed that this unit will be operated and serviced by
people speaking some of the languages used in this Manual.
If this is not the case, the customer should add safety, caution
and operating signs in the native language of the personal.
• This DHWT has been designed for the following water tempe-
ratures. Operate the DHWT within this range:
Tank operation Temperature
• This manual should be considered as a permanent part of the
DHWT. This manual gives a common description and informa-
tion for this DHWT
D A N G E R
General norm for hydraulic connections.
5 SYSTEM DESCRIPTION

5.1 MODEL DESCRIPTION

Model Description
DHWT200E-2.5H1E, 1~ 230V 50Hz
DHWT300E-2.5H1E, 1~ 230V 50Hz
DHWT200S-2.5H1E, 1~ 230V 50Hz
DHWT300S-2.5H1E, 1~ 230V 50Hz
9 PMML0198A-rev.1 - 04/2011
All manuals and user guides at all-guides.com
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Min. Max.
Out of Freeze 70ºC
Model Code
70544000 DHWT-CP-01
70544001 DHWT-CP-02
70544100 DHWT-SWG-01
70544101 DHW-CP-03
DHW-CP-04
PART I- OPERATION
The secondary circuit (domestic water circuit) should be fitted
with a pressure and temperature relief valve (pressure set-
ting 7 bar; temperature setting 90ºC). (See DHWT-SWG-01
accessory).
The safety valve evacuating pipe must lead to a drain but this
pipe must not be directly connected to the drain.
The primary circuit (heating water circuit) should be fitted with
a safety valve which is set at 3 bar, maximum Once the tank
has been installed, firstly fill the secondary circuit (domestic
water) and pressurise it.
Once step 4 has been carried out, fill the primary circuit.
lf the main pipe is not a stainless steel pipe then dielectric
bushes must be fitted at secondary circuit connections.
lf the cold water entry pressure is higher than the equipment's
design pressure a pressure reducer must be fitted with a pres-
sure setting of less than the design pressure.
To prevent heat loss through the hot water pipe in night rate
storage systems, an anti-thermal siphon should be fitted at
the storage tank outlet. The hot water pipe should be lagged
(at least up to the anti-thermal siphon).
Return circuits should be avoided when made of copper.
This installation is subject to building regulations approval, no-
tify local authority of intention to install.
Please, leave the manual with the householder after installa-
tion.
Cylinder relief valve connections should not be used for any
other purpose.
Siphoning the water from the secondary circuit (instructions):
• I solate the tank from the net pressure, i.e. through a cut-
off valve in the cold water inlet.
• Open the relief valve of the tank.
• T hrough the cold water inlet tube, that goes directly to
the bottom part of the tank and by syphon effect, the
hot sanitary water tank will be emptied through the relief
valve discharge tube.
Model Description Model Code
70544900
70544901
70544902
70544903
70544904