ACV E-Tech S 160 Release note

160 - 240 - 380
Installation, Operating and
Servicing Instructions
 664Y4600 • D
ENFRRU PL DE IT ES NL


664Y4600 • D
ENFRRU PL DE IT ES NL
PEOPLE WHO SHOULD READ THESE
These instructions should be read by:
- the specifying engineer
- the installing engineer
- the user
- servicing technicians
SYMBOLS
The following symbols are used in these instructions:
Essential to ensure that the system works properly.
Essential for personal safety and environmental
protection.
Danger of electrocution
Danger of burns.
WARNINGS
These instructions are an integral part of the equipment to which
they refer and the user must be provided with a copy.
The product must be installed and serviced by qualified engineers,
in compliance with current standards.
ACV cannot accept liability for any damage resulting from
incorrect installation or from the use of components or fittings
not specified by ACV
Any failure to follow instructions relating to tests and
test procedures may result in personal injury or risks of
pollution.
ACV reserves the right to change the technical
specifications and components of its products without
prior notice.
IntroductIonIndex
INTRODUCTION 2
People who should read these instructions 2
Symbols 2
Warnings 2
INSTALLATION 3
Boiler room 3
Central heating connection 3
Domestic hot water connection 5
Control wiring diagram : E-Tech S 160 5
Control wiring diagram : E-Tech S 240 6
Control wiring diagram : E-Tech S 380 7
Power wiring diagram : E-tech s 160 8
Power wiring diagram : E-tech s 240 9
Power wiring diagram : E-tech s 380 10
STARTING UP 11
Filling the heating and domestic hot water circuits 11
SERVICING 12
Recommendation 12
Servicing the safety devices 12
Emptying 12
Recommendation 12
DESCRIPTION 13
Overview 13
Description of operation 13
Build features 13
TECHNICAL SPECIFICATIONS 15
Dimensions 15
Maximum operating conditionsn 15
Domestic hot water performance 15
Boiler specifications 15
USER GUIDE 16
Using the boiler 16
Boiler room 17

YY
2
3
4
8
8
7
5
9
1
YY
2
3
4
88
6
5
9
Hydraulic diagram with circulator controlled by
a room thermostat.
Hydraulic diagram with motorised mixer valve
 664Y4600 • D
ENFRRU PL DE IT ES NL
BOILER ROOM
ACCESSIBILITY
The boiler room must be large enough to allow proper access to
the boiler. The following minimum distances around the boiler are
required
- at the front: 500 mm
- above: 300 mm
- on the central heating connection side: 150 mm
This boiler can be connected to the central heating circuit in any one
of three directions.
BASE
The boiler must be laid on a base made of non-combustible materials.
CENTRAL HEATING CONNECTION
The drain cock (9) and safety valve (2) must be connected to the
waste water disposal system.
The boiler is fitted with an expansion chamber with a
capacity of:
 
 
If the expansion volume is not sufficient for your needs
then it is possible to install an additional tank.
 
1. Motorised 3-way manual mixer valve
2. Safety valve preset to 3 bar with pressure gauge
3. Circulator
4. Non-return valve
5. Expansion tanks
6. Room thermostat
7. Control Unit controller (in option)
8. Central heating isolation valves
9. Discharge outlet
I n s ta ll at I o n
Hydraulic Connections

Connection without thermostatic mixing valve
1
2
4
6
5
7
9
8
Connection with thermostatic mixing valve
1
2
4
6
5
7
9
8
3

664Y4600 • D
ENFRRU PL DE IT ES NL
DOMESTIC HOT WATER CONNECTION
Pressure reducer
If the water mains pressure is greater than 6 bar, a pressure reducer
calibrated to 4.5 bar must be fitted.
Safety unit
The tank safety unit must be ACV approved and calibrated to 7 bar.
The valve discharge must be connected to the waste water disposal
system.
Domestic hot water expansion tank
Installing a domestic hot water expansion tank avoids any risk of
overpressure due to pressure surges and also makes sure that there
is a always water flowing through the safety unit when refilling the
domestic hot water tank.
Hot water circulation
If the tank is located a long way from the point of use, then installing
a closed recirculation circuit ensures that a faster supply of hot water
is always available.
2.2.3.5 Description
1. Safety unit
2. Pressure reducer
3. Thermostatic mixing valve
4. Hot water circulator
5. Non-return valve
6. Domestic hot water expansion tank
7. Inlet valve
8. Draw-off valve
9. Bleed valve
IMPORTANT
As a safety measure against burns, we strongly advise
installing a thermostatic mixing valve (recommended

This is available as an optional accessory
Safety unit Ø 3/4”
Pressure reducer Ø 3/4”
Thermostatic mixing valve Ø 3/4”
Expansion tank 5 liter
I n s ta ll at I o n

 664Y4600 • D
ENFRRU PL DE IT ES NL
N
L1
3
1
4
2
10 11
t
P
6 9
5
8
7
17 18
14 1512 13
t
t
(78 - 53°C)
(85 - 60°C)
M
16
Or
B
Br
B
Br Br Bk
Bk Bk
B
B
Br
Bk Bk
Y
YGG
G
G
Or
W
Pk
R
Or Or B
B
B
B
B
B
B
Or
WPk
R
Pk
R
W
W
BB B
B
Bk
B
B
Bk
B
B
B
B
BB B B
BB
t
C
2
1C
1
2
1.1. 1.2.
2.1. 2.2.
A
BC
D
EGH
IJ
LF
K1
K3
K2
B. Blue
Bk. Black
Br. Brown
G. Grey
Or. Orange
Pk. Pink
R. Red
V. Violet
W. Withe
Y. Yellow
A ON/OFF switch
B Manually reset safety thermostat
C Water pressure switch
D Alarm indicator
E Limit thermostat 95°C
F Summer / Winter switch
G Control thermostat 60 - 85°C
H Power level switch 1
I Timer
J Power level switch 2
K1 Power Relay 1 - Level 1
K2 Power Relay 1 - Level 2
K3 Power Relay 2 - Level 1
L Room thermostat (optional)
M Loading pump
1-2: Life (230V ~ 50Hz)
3-4: Neutral
5-6: Time Clock (optional)
7-8: Safety switch
10-11: Stop Bridge
12-13: Room thermostat (optional)
14-15: Heating pump (optional)
17-18: Relay K3 disactivated
I n s ta ll at I o n
21 3 5 15 174 7 9 10 11 12 13 16 19 216 8 14 18 20 22
CONTROL WIRING DIAGRAM : ETECH S 160
The control circuit is automatically powered from the power circuit.
It is also protected by a 3A magneto-thermal circuit breaker.
CONNECTING THE ACCESSORIES
The electrical accessories are connected to the numbered terminals
on this diagram below.
IT IS IMPORTANT TO SWITCH THE BOILER OFF
BEFORE CARRYING OUT ANY WORK.


664Y4600 • D
ENFRRU PL DE IT ES NL
N
L1
3
1
4
2
10 11
t
P
6 9
5
8
7
17 18
14 1512 13
19 20
t
t
(78 - 53°C)
(85 - 60°C)
M
16
Or
B
Br
B
Br Br Bk
Bk Bk
B
B
Br
Bk Bk
Y
Y G G
G
G
Or
W
Pk
R
Or Or B
B
B
B
B
B
B
B
Or
WPk
R
Pk
R
Pk
W
V
W
V
B B B
B
Bk
B
B
Bk
B
B
B
B
B B B B
B B
t
C
2
1 C
1
2
1.1. 1.2.
2.1. 2.2.
A
BC
D
EGH
I J
LF
K1
K3
K2
K4
B. Blue
Bk. Black
Br. Brown
G. Grey
Or. Orange
Pk. Pink
R. Red
V. Violet
W. Withe
Y. Yellow
A ON/OFF switch
B Manually reset safety thermostat
C Water pressure switch
D Alarm indicator
E Limit thermostat 95°C
F Summer / Winter switch
G Control thermostat 60 - 85°C
H Power level switch 1
I Timer
J Power level switch 2
K1 Power Relay 1 - Level 1
K2 Power Relay 1 - Level 2
K3 Power Relay 2 - Level 1
K4 Power Relay 2 - Level 2
L Room thermostat (optional)
M Loading pump
1-2: Life (230V ~ 50Hz)
3-4: Neutral
5-6: Time Clock (optional)
7-8: Safety switch
10-11: Stop Bridge
12-13: Room thermostat (optional)
14-15: Heating pump (optional)
17-18: Relay K3 disactivated
19-20: Relay K4 disactivated
I n s ta ll at I o n
21 3 5 15 174 7 9 10 11 12 13 16 19 216 8 14 18 20 22
CONTROL WIRING DIAGRAM : ETECH S 240
The control circuit is automatically powered from the power circuit.
It is also protected by a 3A magneto-thermal circuit breaker.
CONNECTING THE ACCESSORIES
The electrical accessories are connected to the numbered terminals
on this diagram below.
IT IS IMPORTANT TO SWITCH THE BOILER OFF
BEFORE CARRYING OUT ANY WORK.

 664Y4600 • D
ENFRRU PL DE IT ES NL
B. Blue
Bk. Black
Br. Brown
G. Grey
Or. Orange
Pk. Pink
R. Red
V. Violet
W. Withe
Y. Yellow
A. Bipolar magneto-thermal circuit breaker
B. ON/OFF switch
C. Manually reset safety thermostat
D. Water pressure switch
E. General shutdown bridge
F. Neutral safety switch
G. Automatically reset 95° C cut-off thermostat
H. Minimum thermostat
I. Two-stage control thermostat
J. Power limitation switch
K. Shutdown bridges for the various stages
L. Power relays
M. Day / night signal
N. Booster pushbutton
O. Calibrator relay preset for a period of one hour
P. Reverse current relay
Q. Summer / winter selector switch
R. Room thermostat (optional)
S. Circulation pump
I n s ta ll at I o n
CONTROL WIRING DIAGRAM : ETECH S 380
The control circuit is automatically powered from the power circuit.
It is also protected by a 3A magneto-thermal circuit breaker.

The electrical accessories are connected to the numbered terminals
on this diagram below.
IT IS IMPORTANT TO SWITCH THE BOILER OFF
BEFORE CARRYING OUT ANY WORK.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Power supply for optional clock (230 Volt ac)
General shutdown bridge
Contact for day / night signal connection
Room thermostat connection
Load shedding for the 1st power stage
Load shedding for the 2nd power stage
Load shedding for the 3rd power stage
Load shedding for the 4th power stage
2
30
v ac
1.1.
1.2.
2.1.
2.2.
11
8
6
5
1
3
15
1
6
18
Y1
A1
A2
(85-60)°C)
Booster Li
g
ht
On-Peak Li
g
ht
C
1
C
2
1
0
9
12
11
14
1
3
1
6
15
2
1
8
7
6
5
4
3
1
2
A
A
B
E
G
C
D
F
I
H
(78-53°C)
I
J
J
K
K
K
K
L
L
L
L
M
N
O
P
Q
R
S


664Y4600 • D
ENFRRU PL DE IT ES NL
POWER WIRING DIAGRAM : ETECH S 160
POWER CIRCUIT POWER SUPPLY
The power circuit must be connected using three phase
3 x 400 V + Neutral.
K1 K2 K3
R
Bk
B B B B B B
Bk
Or Or
R
R
Bk
B B B B B B
Bk
Or Or
R
3 x B 3 x B
3 x Or
2 x Bk
1 x R
1 x R
123456
A
E-Tech S 160 14,4 kW 12 kW 9,6 kW 7,2 kW
TRI
PHASE 1
N
23
L1
4
L2
5
L3
61
N
23
L1
4
L2
5
L3
61
N
23
L1
4
L2
5
L3
61
N
23
L1
4
L2
5
L3
6
17 18
17 18
17 18
17 18
17 18
17 18
17 18
17 18
I n s ta ll at I o n
B. Blue
Bk. Black
Or. Orange
R. Red
A Safety switch
K1 Level 1 - power relay 1
K2 Level 2 - power raelay 1
K3 Level 1 - power relay 2
        
fixed wiring and must be earthed.
          
person and in accordance with the current IEE Wiring
Regulations.

 664Y4600 • D
ENFRRU PL DE IT ES NL
POWER WIRING DIAGRAM : ETECH S 240
POWER CIRCUIT POWER SUPPLY
The power circuit must be connected using three phase
3 x 400 V + Neutral.
I n s ta ll at I o n
4 x B
4 x Or
3 x Bk 1 x Bk
3 x R 1 x R
12 34 5 6
K1 K2 K4
Or
R
Bk
B
Or
R
Bk
B
Or
R
Bk
B
Or
R
Bk
B
Or
R
Bk
B
Or
R
Bk
B
Or
R
Bk
B
Or
R
Bk
B
K3
A
E-Tech S 240 28,8 kW 26,4 kW 24 kW 21,6 kW
TRI
PHASE 1
N
2
L1
3
L2
4 5
L3
61
N
2
L1
3
L2
4 5
L3
61
N
2
L1
3
L2
4 5
L3
61
N
2
L1
3
L2
4 5
L3
6
19 20
19 20
19 20
19 20
19 20
19 20
19 20
19 20
B. Blue
Bk. Black
Or. Orange
R. Red
A Safety switch
K1 Level 1 - power relay 1
K2 Level 2 - power raelay 1
K3 Level 1 - power relay 2
        
fixed wiring and must be earthed.
          
person and in accordance with the current IEE Wiring
Regulations.


664Y4600 • D
ENFRRU PL DE IT ES NL
I n s ta ll at I o n
POWER WIRING DIAGRAM : ETECH S 380
POWER CIRCUIT POWER SUPPLY
The power circuit must be connected using three phase
3 x 400 V + Neutral.
A Control circuit power supply
B Safety switch
C Power terminal block
K Power relays
L1
L2
L3
N
4 x or
4 x nr
4 x rg
4 x bl
T
bl
rg
nr
or
bl
rg
nr
or
bl
rg
nr
or
bl
rg
nr
or
4 x or
4 x nr
4 x rg
4 x bl
A
K
K
K
K
C
B
bl. Blue
nr. Black
or. Orange
rg. Red
T. Green and yellow
        
fixed wiring and must be earthed.
          
person and in accordance with the current IEE Wiring
Regulations.
 

 664Y4600 • D
ENFRRU PL DE IT ES NL
FILLING THE HEATING AND DOMESTIC HOT
WATER CIRCUITS
1. Fill the domestic hot water circuit and bring it up to pressure.
IMPORTANT
The hot water tank must be pressurised before the
heating circuit is filled.
2. Fill the central heating circuit making sure that any air in the
upper part of the boiler and any air in the system is bled.
3. Remove the front of the boiler.
4. Check the electrical connections paying particular attention to
the quality of the connections on the power circuit terminals.
5. Set all the switches on the control panel to the OFF position and
set the internal magneto-thermal circuit breaker to ON. Replace
the front of the boiler.
6. Switch the boiler on from the external box.
7. Set the ON/OFF switch to the ON position and the summer/
winter selector switch to the winter position.
8 After allowing the circulator to work for a few minutes, set the
ON/OFF switch to the OFF position, bleed the circulation pump
and make sure that both the boiler and the system are properly
bled. Adjust the pressure to the static pressure 

9. The boiler is now ready to operate. Set the ON/OFF switch to the
ON position, the summer/winter selector, the half and full power
switches and the control thermostat all to the desired positions.
After a few days in operation we advise you to check the
quality of the electrical connections and also make sure
there is no air in either the boiler or the system.
Switch the power supply off from the outside box before
carrying out any work.
startInG uPI n s ta ll at I o n
ELECTRICAL SAFETY DEVICES
• The boiler must be effectively earthed.
• A box fitted with a magneto-thermal circuit breaker must be
fitted on the outside of the boiler. This is to protect the boiler
and allow the power supply to be switched off during servicing or
other work on the boiler.
First make sure that the system complies with all current
standards.
• To avoid any risk of electrocution, the electrical circuit must be
fitted with a differential circuit breaker.
• The control circuit is protected by a 3A magneto-thermal circuit
breaker.
• The boiler is protected against overheating even if one or more
power switches malfunction by means of a magnetic power
switch placed in series with the power switches.
COMPLIANCE
The installation must be carried out in accordance with the current
local technical standards and legislation.
1
4
5
3
2
6
Electrical terminal block
1. Power terminal block
2. Magneto-thermal circuit breakere
3. Calibrator relay
4. Safety switch
5. Contacteurs de puissance
6. Control terminal block

Primary Draining
Domestic Hot Water Draining
YY
11
5
2
B
A
C
D

664Y4600 • D
ENFRRU PL DE IT ES NL
SERVICING THE BOILER
1. Set the on/off switch on the control panel to the OFF position and
switch the power off from the external box.
2. Remove the top panel and the front and carry out a visual
inspection of the boiler looking out for any leaking water.
3. Inspect the wiring looking for any sign of overheating.
4 . Check that the screws on the connection terminal block are
properly tightened.
5. Replace the front and the top panel.
6. Switch the boiler back on again.
SERVICING THE SAFETY DEVICES
1. Check that the thermostats and safety devices are working
properly.
2. Check the safety valves on both the central heating and the hot
water circuits.
EMPTYING
EMPTYING THE PRIMARY CIRCUIT CENTRAL HEATING:
1. Switch the power to the boiler off at the mains switch installed by
the electrician.
2. Close the boiler system’s isolating valves (1).
3. Connect a hose to the drain cock (2) and make sure that it is
properly connected.
4. Open the drain cock and allow hot water to flow out into the
waste water disposal system, check that air is being taken into the
system, by opening the air vent, for instance.
5. Once you have finished, put the drain cocks back into their
original positions and adjust the pressure to the static pressure +
0.5 bar.
EMPTYING THE DOMESTIC HOT WATER TANK:
1. Switch the mains power to the boiler off at the external switch
installed by the electrician.
2. Close valves (A) and (B).
3. Open valves (C) and (D) (first C then D).
4. Let the water drain away.
5. When you have finished, return the valves to their initial positions.
           
situated at ground level.
There is a risk of burns from hot water!
RECOMMENDATION
ACV recommend that boilers should be serviced at least once a year.
This servicing work should be carried out by a competent technician.
serVIcInG

 664Y4600 • D
ENFRRU PL DE IT ES NL
descrIPtIon
DESCRIPTION OF OPERATION
THE TANKINTANK CONCEPT
The Etech’s series differs from traditional hot water producers in that
it has a tank immersed in the primary fluid contained in the outer
body.
When there is a temperature drop in the boiler because the central
heating system or the domestic hot water circuit needs hot water, the
internal thermostat starts up the power on the immersed electrical
resistors. The heating elements quickly heat up the primary fluid, thus
creating a natural circulation around the tank.
INDIRECTLY HEATING DOMESTIC HOT WATER
This circulation allows easier heat exchange between the primary fluid
and the domestic water, all over the tank surface. The corrugations
on the outer shell of the tank increase the area of heat exchange still
further and thus speed up the process of heating the domestic water.
EASY TO SET AND TOTALLY SAFE
With a single command, the water temperature of both the primary
circuit and the domestic hot water circuit can be set by the adjustable
thermostat situated underneath the tank in the primary circuit.
A cut-off thermostat, placed on the top of the boiler, automatically
switches off the power when the temperature of the water in the
primary circuit reaches 95° C. A manually reset safety thermostat
switches off the system if the temperature reaches 103° C.
BUILD FEATURES
OUTER BODY
The outer body containing the primary fluid is made of thick STW 22
steel.
TANKINTANK TYPE EXCHANGER ACCUMULATOR
The internal tank which has a large heating surface for the production
of domestic hot water is made of Chrome/Nickel 18/10 stainless
steel. It is corrugated all the way up using an exclusive manufacturing
process and is entirely argon arc welded using the TIG (Tungsten Inert
Gas) process.
INSULATION
The boiler body is fully insulated by rigid polyurethane foam, with a
thickness of 70mm, with a high thermal insulation coefficient. This is
sprayed onto the tank without using any CFCs.
JACKET
The boiler is covered by a steel jacket which has been scoured and
phosphated before being stove finished at 220° C.
HEATING ELEMENTS
nding on the model, the boiler is fitted with either six or seven
detachable stainless steel AISI 304L immersion heaters.
OVERVIEW
• Combination boiler (central heating and domestic hot water).
•  indirect storage type domestic hot water production.
• The central heating connections are designed so that they can be
connected in all three directions, this means that the boiler can be
installed against a wall or in a corner without having to leave any
free space .
• Internal two-stage temperature control thermostat, which allows
the power to be adapted according to actual heat requirements.
• The day/night function allows you to store up a volume of water
at a high temperature during cheap rate periods (at night) and use
the energy stored up in this way at peak rate times (during the
day).
• The boiler is fitted with expansion tanks, a safety valve, a
manothermometer, a water low safety device (pressure switch)
and a circulation pump.
•    boilers have an effective output of 14.4 kW for the 
model and 28.8 kW for the  and  models. These outputs
can be adjusted either using the power limiting switch on the
boiler’s control panel or by removing the bridges from the control
terminal block.
Stainless steel domestic hot water tank

CONTROL PANEL
1 - ON/OFFswitch
2 - Power selection switch
3 - Summer/Winter selector switch
4 - Mano-thermometer
5 - Thermostat adjustable between 60 and 85 °C
6 - Safety thermostat:
7 - Safety indicator light
8 - Control Unit (optional)
Control panel
1 274 385
Cutaway boiler
1
7
11
8
6
10
5
2
9
3
4

664Y4600 • D
ENFRRU PL DE IT ES NL
descrIPtIon
1. Central heating flow pipe
2. Domestic hot water connections
3. Expansion tank
4. Heating resistors
5. Central heating return
6. Internal stainless steel tank
7. Primary tank
8. Water low safety device
9. Primary safety valve (3bar)
10. Rigid polyurethane foam insulation (70 mm)
11. Cold water inlet

 664Y4600 • D
ENFRRU PL DE IT ES NL
Dimensions E-Tech S 380
B C
GF
D
A
E
J
KK
H
L
DIMENSIONS
Units are shipped fully assembled, tested and packed on a timber base
with shockproof edges and protected by a heat-shrunk plastic film.
On reception and after unpacking, check the equipment for any
damage. For transportation purposes, please see the weights and
dimensions shown (see table of dimensions).
MAXIMUM OPERATING CONDITIONS
Maximum operating pressure (tank full of water)
- Primary circuit: 3 bar
- Secondary circuit: 10 bar
Test pressure (tank full of water)
- Primary circuit: 4,5 bar
- Secondary circuit: 13 bar
Operating temperature
- Maximum temperature: 85° C
DOMESTIC HOT WATER PERFORMANCE E-Tech S 160 E-Tech S 240 E-Tech S 380
Operating at 80°C
Peak ow at 40 °C (∆T = 30 °C) liter /10' 356 545 875
Peak ow at 40 °C (∆T = 30 °C) liter /60' 700 1234 1564
Continuous ow at 40 °C (∆T = 30 °C) liter /h 413 827 827
Tank rell time at 60 °C
Initial heating time minutes 36 41 67
After drawing o 140 liters at 45 °C minutes 16 12 12
BOILER SPECIFICATIONS E-Tech S 160 E-Tech S 240 E-Tech S 380
Output kW 14,4 28,8 28,8
Operating voltage Volt 3 x 400 + N 3 x 400 + N 3 x 400 + N
Heating elements 6 x 2 6 x 2 7 x 2
Total capacity liter 167 250 394
Primary circuit capacity liter 68 86 131
Heating connection Ø1" 1" 1"
Domestic hot water connection Ø3/4" 3/4" 1"1/2
Hot water tank heat exchange surface m21,26 1,94 2,65
Expansion vessel 1 x 12 litres 1 x 12 litres 2 x 8 litres
Weight empty kg 115 155 230
E-Tech S 160 E-Tech S 240 E-Tech S 280
A mm 1342 1818 2134
B mm 590 590 720
C mm 728 728 800
D mm 928 1403 1985
E mm 249 249 300
F mm 402 402 92
G mm 181 181 265
H mm 958 1433 435
J mm 295 295 360
K mm 180 180 135
L mm 150 150 135
Dimensions E-Tech S 160 & 240
B C
G
F
AD
E
H
K
K
L
J
tecHnIcal sPecIFIcatIons

USING THE BOILER
LEARNING YOUR WAY AROUND THE CONTROL PANEL
Before carrying out any work on the boiler, switch the
power off at the mains switch fitted in the boiler room
by the electrician.
 
This must be used to switch the boiler off before carrying out any
work on it.
 
The control panel is fitted with two switches allowing the user to
select the boiler power according to his needs.
When only the first switch is pressed down, the boiler power is limited
to the first stage using +/- half of the power (ideal in summer). In
order for the boiler to run at full power, both of the switches must be
pressed down.
 
“Winter” position: provides both domestic hot water and central
heating functions. “Summer” position: The central heating circulator
is switched off. Only the domestic hot water function is provided. If
there is not enough hot water available, we recommend setting the
thermostat (9) to a higher
value. When the weather turns cold again, simply select “Winter” to
reactivate the heating system..
 
Reads the boiler primary circuit (central heating) temperature
andpressure directly.
 
Central heating systems are generally designed to operate at a
maximum of 80° C. When used at lower temperatures, a 3-way mixer
valve installed on the heating flow pipeallows the temperature to be
set manually or, if you decide to install a regulator, automatically.
We recommend that you set the thermostat to the maximum values
to get the best out of the domestic hot water system.
There is a risk of burns from hot water!
The water stored in the domestic hot water tank in the boiler can be
at a very high temperature.
In all cases, install the thermostatic mixer on the domestic hot water
flow pipe which must not exceed 60° C.
A mixer or mixing valve at each point of use is recommended.
 
When the temperature in the boiler exceeds 103°C, the manually reset
safety thermostat is started up.
CENTRAL HEATING SYSTEM GAUGE PRESSURE
Your boiler is fitted with a central heating safety valve, set to 3 bar, and
with a pressure gauge.
First make sure that the water in the system is still pressurised. When
cold and after the air in the system has been bled, the pressure gauge
should show a pressure of between 1 and 2, depending on the height
of the building: (1 bar = 5m / 1.5 bar = 10 m and 2 bar = 15 m).
To add water, open the filling valve.
Make sure that the drain cock is properly closed after filling and isolate
the filling circuit from the central heating circuits. Bleed the air in the
system to get an accurate water pressure reading.
 
This light is lit when the safety thermostat starts up or when the water
pressure in the boiler is too low.
8 - Control Unit
Please see the enclosed instructions if you have chosen this option.
Control panel
1
2
6 3
7
548

664Y4600 • D
ENFRRU PL DE IT ES NL
user GuIde

 664Y4600 • D
ENFRRU PL DE IT ES NL
user GuIde
SAFETY VALVE CENTRAL HEATING
A monthly inspection is recommended:
Lift the lever on the emptying device for a few seconds to ensure that
the safety valve is working properly
The water which may flow out of the safety valve
is very hot and may cause serious burns.
The pipe discharging into the waste water disposal
system should be open to the atmosphere.
Make sure there is nobody near the flow of hot
water.
If you notice anything unusual after this short trial,
please inform the installing engineer.
SAFETY UNIT DOMESTIC HOT WATER
A monthly inspection is recommended:
Lift the lever on the emptying device for a few seconds to ensure that
the safety valve is working properly.
The water flowing out of the safety unit may be
extremely hot.
The pipe discharging into the waste water disposal
system should be open to the atmosphere.
Make sure there is nobody near the flow of hot
water.
If you notice anything unusual after this short trial,
please inform the installing engineer.
BOILER SHUTDOWN
If the red light on the control panel lights up, this indicates an
operating fault.
1. Check the boiler pressure, it should be between 1 and 2 bar
depending on the height of the building.
2. Once you have checked the pressure, wait until the boiler has
cooled down before resetting the safety thermostat.
3. Unscrew the safety thermostat’s protective cap.
4. Restart the thermostat using a blade end.
5. If the system shuts down again, please inform the installing
engineer.
To ensure your system operates properly, have it
professionally serviced once a year before the cold
weather starts.
BOILER ROOM
• Keep vents free at all times.
• Do not store any inflammable products in the boiler room.
• Take care not to store any corrosive products, such as paints,
solvents, chlorine, salt, soap and other cleaning products, near the
boiler.


664Y4600 • D
ENFRRU PL DE IT ES NL