Saunier Duval ECOSY 24 E User manual

1
ECOSY
Heating and hot water for the professionals
ECOSY 24 E, ECOSY 5B 24 E is CAT
II2H3+ appliances
ECOSY 28 E, ECOSY 5B 28 E is CAT
I2H appliances
01773 828100
IN WARRANTY
TECHNICAL HELPLINE
01773 828400

2
INSTALLATION AND OPERATING INSTRUCTIONS
ECOSY 24 E, ECOSY SB 24 E
ECOSY 28 E, ECOSY SB 28 E
Note!
The boiler serial number is marked on the label attached to the top of the inner bulkhead. Refer to
the 'Introduction' section page 3 for a description of the basic functions of the boiler. The 'Users'
section describes how to safely operate the boiler.
INSTALLATION SECTION
Introduction .................................................. Page 3
Commissioning ....................................................... 3
Controls & lighting ............................................ 4 - 6
Draining................................................................... 7
Servicing/maintenance ........................................ 7
Introduction ................................................. Page 3
Technical data ...................................................... 8
Dimensions ............................................................. 9
Boiler schematic ................................................... 9
Connections plate.............................................. 10
Piping system installation ................................... 10
Heating system design ....................................... 11
Domestic hot water system design .................. 12
Boiler location ..................................................... 12
Boiler installation ................................................. 13
Flue installation ............................................. 14 - 15
Electrical installation ........................................... 16
Commissioning .................................................... 17
Operating safety devices .................................. 18
Settings ................................................................. 19
Changing gas type ............................................ 20
USERS SECTION
Mandatory warning for CEE countries
Warning: This appliance is designed, approved and inspected to meet the requirements of the
English market. The identification plate located on the inside of the appliance certifies the origin
where the product was manufactured and the country for which it is intended.
If you see any exception to this rule, please contact your nearest Saunier Duval dealer.
Thank you in advance for your assistance.

3
INTRODUCTION
The ECOSY 24 E and ECOSY 28 E boilers are wall
mounted combination boilers providing central
heating and instantaneous hot water.
The ECOSY SB 24 E and ECOSY SB 28 E boilers are
wall mounted system boiler providing central
heating only.
The ECOSY 24 E and ECOSY SB 24 E boilers are of the
II2H3+ category for use with Natural Gas (G20) and
Liquide gas (G30 and G31)as distributed in the
United Kingdom.
The ECOSY 28 E and ECOSY SB 28 E boilers are of the
I2H category for use with Natural Gas (G20) as
distributed in the United Kingdom.
The boilers have a fan assisted balanced flue which
both discharges the products of combustion to and
draws the combustion air from the outside of the
room.
The boilers are suitable for top outlet flue connection
only but, can be fitted with horizontal flue, vertical
flue or twin-pipe flue. Refer to flue catalogue for
further details.
On ECOSY 24 E and ECOSY 28 E, both the central
heating and domestic hot water temperature are
user adjustable from the boiler control panel.
On ECOSY SB 24 E and ECOSY SB 28 E, the central
heating temperature is user adjustable from the
boiler control panel.
On the ECOSY 24 E and ECOSY 28 E, domestic hot
water demand always has priority over heating
demand.
The boiler is designed for use as part of a sealed
water central heating system with fully pumped
circulation. The pump, expansion vessel and
associated safety devices are all fitted within the
boiler.
The boiler can be installed against either an external
wall or on an adjacent inside wall, that is, the flue
system will pass directly to the rear or to either side
to the terminal fitted on the outside wall face.
The installation must be carried out by a competent
person in accordance with the relevant
requirements of The Building Regulations, The Water
Byelaws, The Building Standards (Scotland)
Regulations and any applicable local regulations.
These instructions should be carefully followed for
the safe and economical use of your boiler.
Ancillary equipment
A range of flue accessories are available including
vertical flues, twin-pipe flues, bends etc.
For further information contact your supplier.
COMMISSIONING
Ins 048a
Diagram. 1
OPENING THE CONTROL PANEL COVER
Gas safety (Installation and use) Regulations
In your interests and that of gas safety, it is the law
that ALL gas appliances are installed and serviced
by a competent person in accordance with the
above regulations.
Gas leak or fault
If a gas leak or fault exists or is suspected, turn the
boiler off and consult the local gas supply company
or your installation/service company.
Boiler controls
The control panel, located at the lower front of the
boiler casing, see diagram 1, allows the boiler to be
started, shut down, controlled and monitored dur-
ing use.
Flue
Do not obstruct the outside terminal of the boiler.
Starting the boiler
Before starting the boiler check that:
- The gas meter tap is open.
- The boiler gas service cock is open.
- The boiler is connected to the electrical supply and
turned on.

4
CONTROLS AND LIGHTING
The control panel, located at the lower front of the boiler casing, see diagram 2, allows the boiler to be
started, shut down, controlled and monitored during use.
Hab 197a
Diagram 2
Control panel description (diagram 2):
1 - ON/OFF switch
2 - Summer/winter switch
3 - PC connector
4 - Reset button
5 - Display
6, 7, 8 and 9 - Program selection buttons
10 - Pressure gauge
0 6 5
O
123
4
bAR
IMIT
MODE ENTER SETPC
98 10 765431 2
SETTING TO SUMMER MODE
(Hot water only)
➜PUSH BUTTON TO POSITION TO SET THE
BOILER TO SUMMER MODE
2
SETTING TO WINTER MODE
(heating and hot water)
➜PUSH BUTTON TO POSITION TO SET THE
BOILER TO WINTER MODE
Make sure that:
●The boiler is connected to the electrical supply.
●The boiler gas service cock is open.
●The pressure gauge reads between 1 and 2 bar.
➜PUSH IN BUTTON TO START BOILER
➜
OFF
ON
➜PUSH IN BUTTON IN SUMMER POSITION TO
STOP THE BOILER
Assuming that any remote heating controls are
calling for heat, the above procedure is all that
is required to start the boiler in heating mode.
Hot water has priority over heating.
To obtain domestic hot water, open a hot water
tap.
OFF
ON
➜
OFF
ON
➜
OFF
ON
➜
To ensure maximum life of the boiler control
system, it is recommended that the mains is left
switched on all the time. Power consumption
during stand by is only 7 to 8 watts.
1
2
2
Stopping the boilerStarting the boiler

5
CONTROLS AND LIGHTING
Setting domestic hot water temperature
0 6 5
In all cases, by pressing the «Mode» button until the decimal point disappears, the display reverts to
normal position :
No decimal point displayed
1 - Press «Mode» button once
3 - Press «enter» until the display starts flashing, and press «mode» twice : the boiler is now
operational at the desired hot water temperature.
twice
Note : On the SB versions, this setting is done using the tank thermostat in the tank.
1. 6 5
set
➭➭
2. 6 5
set
mode
➭➭
1. 6 5
enter
-
➭2. 60
+
2. 60
➜
➜
2 - Press «+» or «-» button to set the desired hot water temperature from 40°C to 65°C
(factory set at 65°C)
Hab 198a
Setting heating temperature
Note :
1/ In case of under floor heating systems, the CH flow temperature can be set to between 20 ° C and
45 ° C - contact the Saunier Duval Technical Helpline 01773 828400.
6. 7 0
set
mode
➭➭
6. 85
+
-
➭
1. 6 5
mode
➭
-
1. 60
3 - Press «+» or «-» button to set the desired heating temperature from 20°C to 90°C
(factory set at 70°C)
1 - Press «Mode» button once 2 - Press «Set» button 4 times to show 5on the left
4 - Press «enter» until the display starts flashing, and press «mode» twice : the boiler is now
operational at the desired heating temperature.
Hab 198a
twice