Rointe D SERIES User manual

Instruction Manual
Assembly, installation, start-up
and operating instructions
D Series with
Water Heater
DELTA Ultimate
technology

Many thanks for your confidence in our Rointe products. Before
you start to use the low-consumption digital electrical D Series
with Delta Ultimate technology water heater we recommend that
you read this manual carefully in order to use the product correctly
with the maximum guaranteed results.
Thank you.

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INDEX OF CONTENTS
1. INTRODUCTION ......................................................................................4
2. TECHNICAL ESPECIFICATIONS .............................................................4
3. GENERAL REQUIREMENTS ...................................................................8
4. PLUMBING INSTALLATIONS.................................................................11
5. ELECTRICAL INSTALLATION ................................................................19
6. FILLING AND COMMISSIONING...........................................................22
7. DESCRIPTION OF THE D SERIES WATER HEATER .............................23
7.1. Description of the front panel .......................................................24
7.2. Switch On and Off (Stand By) ......................................................26
7.3. Select Temperature........................................................................27
7.4. Lock the Control Panel .................................................................27
7.5. Adjust Date and Time ...................................................................28
7.6. Main Menu ...................................................................................29
8. ADVANCED FUNCTIONALITY ..............................................................43
9. FUZZY LOGIC ENERGY CONTROL .....................................................44
10. RECOMMENDATIONS ........................................................................44
11. SERVICING AND MAINTENANCE ......................................................45
12. FOULDT FINDING ...............................................................................47
13. GUARANTEE .......................................................................................48
14. INSTALLATION, COMMISSIONING AND SERVICE RECORD ............53

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1. INTRODUCTION
The D Series electric water heater is a high quality unvented enam-
elled steel domestic hot water cylinder suitable for domestic hot
water systems where the cold mains water supply has a maximum
supply pressure of 0.9 MPa. Reduced performance is available at
lower pressures but the units are not suitable for pressures lower
than 0.15 MPa and flow rate of 20 litres per minute.
Rointe offers the possibility to acquire all the necessary safety
equipment to comply with legislation governing the installation of
such systems.
2. TECHNICAL ESPECIFICATIONS
TECHNICAL SPECIFICATIONS - 50L, 75L & 100L
MODEL NOMBER DWI050DHW2 DWI075DHW2 DWI100DHW2
Storage capacity (l) 50 75 100
Power (W) 2,400 2,400 2,400
Depth (mm) 404 404 404
Width (mm) 404 404 404
Overall height incl T/P valve 780 1,000 1,250
Height excl T/P valve 680 900 1,150
Weight when full (kg) 68 100 132
Cold feed/hot draw off
connections (mm) 15 15 15
Maximum water supply
pressure (MPa) 0.9 0.9 0.9

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D Series with DELTA Ultimate technology
TECHNICAL SPECIFICATIONS - 50L, 75L & 100L
MODEL NUMBER DWI050DHW2 DWI075DHW2 DWI100DHW2
System operating
pressure (pre-set)
(MPa)
0.6 0.6 0.6
Expansion vessel
charge pressure
(MPa)
0.15 0.15 0.3
Expansion relief valve
set pressure (MPa) 0.6 0.6 0.6
Temperature and pressure relief valve settings:
Lift pressure (MPa) 0.7 0.7 0.7
Lift temperature (ºC) 90 90 90
INSTALLATION KIT (OPTIONAL) - 50L, 75L & 100L
0.3 MPa pressure
reducing valve • • •
0.6 MPa expansion
relief valve • • •
Expansion vessel ltr 8 8 12
15mm to 22mm
Tundish • • •
Isolation valve • • •
PERFORMANCE - 50L, 75L & 100L
Heat up time 15 to 65
ºC (min) 73 110 117
Reheat time for 70%
of contents (min) 51 77 82

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TECHNICAL SPECIFICATIONS - 150L & 200L
MODEL NUMBER DWI150DHW2 DWI200DHW2
Storage capacity (l) 150 200
Power (W) 2,400 2,400
Depth (mm) 580 580
Width (mm) 580 580
Overall height incl T/P valve 1,060 1,220
Height excl T/P valve 960 1,120
Weight when full (kg) 194 256
Cold feed/hot draw off connections
(mm) 22 22
Maximum water supply pressure
(MPa) 0.9 0.9
System operating pressure (pre-set)
(MPa) 0.6 0.6
Expansion vessel charge pressure
(MPa) 0.3 0.3
Expansion relief valve set pressure
(MPa) 0.6 0.6
Temperature and pressure relief valve settings:
Lift pressure (MPa) 0.7 0.7
Lift temperature (ºC) 90 90
INSTALLATION KIT (OPTIONAL) - 150L & 200L
0.3 MPa pressure reducing valve • •

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D Series with DELTA Ultimate technology
INSTALLATION KIT (OPTIONAL) - 150L & 200L
MODEL NUMBER DWI150DHW2 DWI200DHW2
0.6 MPa expansion relief
valve • •
Expansion vessel ltr 12 18
15mm to 22mm Tundish • •
Isolation valve • •
PERFORMANCE - 150L & 200L
Heat up time 15 to 65 ºC
(min) 175 235
Reheat time for 70% of
contents (min) 123 165
2.1. Component Check List
The D Series water heater comes with the following components.
Please check through the components supplied and ensure that
all parts are present:
• Water Heater with sheathed heating elements, digital
thermostat, TFT screen and manual reset thermal cut-out
• T/P valve 0.7 MPa 90ºC and electrolytic fittings
• Installation and user manual
Please contact our customer service department to find out how
to acquire the safety fittings.

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3. GENERAL REQUIREMENTS
3.1. The D Series domestic hot water cylinder MUST be installed
by a competent person in accordance with section G3 of the
current Building Regulations.
3.2. Important
It is important that the installer reads and understands these
instructions and unpacks and familiarises themselves with the
equipment before commencing the installation. Failure to observe
these installation instructions could invalidate the warranty.
3.3. Water supply
The water supply to the cylinder should be potable water direct from
a public mains water supply with any water treatment equipment
functioning correctly.
For optimum performance the unit should be fed via a 15 mm or
22 mm diameter supply pipe direct from the mains water entry
point to the property with supplies a maximum pressure of 0.9
MPa. The unit can operate with a minimum supply pressure of 0.15
MPa and a flow rate of at least 20 litres per minute, but flow from
the outlets will be low if several outlets are used simultaneously.
The cylinder control equipment is factory set to limit the system
operating pressure to 0.3 MPa. The maximum supply pressure
into the pressure-reducing valve is 0.9 MPa.
3.4. Taps and fittings
All taps and fittings incorporated in the unvented system should
have a rated operating pressure of 0.7 MPa or above.

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D Series with DELTA Ultimate technology
3.5. Location
The unit is designed to be vertically wall mounted, indoors, in
a frost-free environment. When choosing a suitable location for
the cylinder, consideration should be given to the routing of the
discharge pipe to a convenient point and also the availability of
an adequate power supply for connecting the sheathed heating
elements.
The wall onto which the cylinder is mounted should be of good
sound masonry construction capable of holding the weight of the
cylinder when full of water (see technical specifications for weights).
The position of the cylinder should be such that easy access is
provided for servicing the controls and replacing the sheathed
heating element should the need arise.
Pipe runs should be made as short as possible and lagged to
prevent heat loss.
To allow for servicing and repairs the unit must be mounted at
least 540 mm above any surface or object, so that access can be
gained to electric connectors and the heating elements may be
removed (see Fig. 1).
The unit should be mounted close to an external wall so that the
discharge pipe D2 (Fig. 2 - Pt. 6) can be routed to a safe visible
place.
The tundish should be mounted in a visible location so that it may
easily be inspected.

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150 mm
100 mm 100 mm
540 mm
H C
Figure 1 - Minimum margins for servicing and repairs.
The distance between holes for the wall mounting depends on the
model, see the following table for reference:
Model DWI050DHW2 DWI075DHW2 DWI100DHW2
Horizontal width between
holes 350 mm 350 mm 350 mm
Height between upper
and lower holes 340 mm 573 mm 768 mm
Model DWI150DHW2 DWI200DHW2
Horizontal width between holes 350 mm 350 mm
Height between upper and lower holes 595 mm 685 mm