ETS 09 User manual

66401300
Installation, Operating and
Servicing Instructions
ETS 09 - 15
Single phase
ETS 09 - 15 - 24
Tri phase
excellence in hot water
ETS
Electric boilers

CONTENTS
1
INTRODUCTION 2
MANUAL HANDLING INFORMATION 3
USER INSTRUCTIONS 4
ELECTRICAL SPECIFICATION 5
PUMP CHARACTERISTICS 6
INSTALLATION 7
COMMISSIONING 12
COMPONENT REPLACEMENT 13
WIRING AND FAULT FINDING
ETS 09-15 Single phase : Control Circuit 18
ETS 09-15 Tri phase : Control Circuit 19
ETS 24 Tri Phase : Control Circuit 20
ETS 09-15 Single phase : Power Circuit 21
ETS 09-15 Tri phase : Power Circuit 22
ETS 24 Tri phase : Power Circuit 23
Honeywell Sundial Wiring Diagrams 24
ETS 09-15 Fault Finding 26
ETS 24 Fault Finding 27
MAINTENANCE & SERVICE LOG 28
Note :
ACV reserves the right to modify the technical specifications and components of its products without prior notice.

INTRODUCTION
2
Introduction
The ETS is a wall hung electric system boiler with
three models in the range :
-ETS 09 and 15 are available in either single phase
or tri phase.
-ETS 24 is tri phase.
The boiler is equipped with all the necessary
components to allow direct connection to a heating
system without the need for a feed and expansion
cistern. These components include; primary 8 litre
expansion vessel (suitable for a system water
content of up to 128 litres), pressure and
temperature gauge, safety valve, circulating pump,
low water pressure switch, control and high limit
thermostats, on/off and power level switches.
The boiler heat exchanger is constructed from mild
steel with welded joints and is insulated with a glass
wool jacket and with aluminium cover. The steel
casing has a white stove enamelled finish and a grey
control panel.
Immersion heaters, constructed from stainless steel
and mounted in the top of the boiler, provide the
power source for the ETS Boiler. The ETS 09 and
ETS 15 have 6 in total, and the ETS 24 has 10 (9 used
with 1 spare).
The boiler is suitable for connection to most heating
and hot water systems, with a maximum working
pressure of 3bar and a maximum temperature of
85˚C. The ETS can also be used in multiple boiler
installations allowing greater outputs to be achieved.
Electrical connection access is located underneath
the boiler, and connection glands for both the main
power supply and optional external controls are
provided, suitable for single or three phase electrical
supply depending upon boiler output required. An
internal 3 amp MCB is linked to the incoming
electrical supply to provide the internal control
circuit, from which optional controls can be
connected e.g. internal or external timeclock, room
thermostat or Honeywell Sundial controls.
The temperature of the boiler is controlled by a dual
stage thermostat which is set by the user to give the
desired boiler temperature. When the boiler has
heated up to within 7°C of the set temperature, the
thermostat switches off one power stage and
therefore reduces the heat input.
Thanks to this simple but effective form of
modulation, the ETS has longer working cycles and
requires less stops and starts, thus resulting in a
more even temperature across the boiler. It also
means less wear and tear on components and,
importantly it uses less power once it has reached
working temperature.
The ETS Boilers have been manufactured to comply
with the following standards BS EN60335-2-35:
1998, BS EN55014-2:1997 and BS EN50081-1-1:
1992.

MANUAL HANDLING INFORMATION
3
REMOVING THE BOILER FROM THE PACKAGING
•Before lifting the boiler from the packaging, ensure that the installation area is clear and that there are no
obstacles making installation difficult or unsafe.
•Lay the boiler on its back (as shown on the box side), open the box and remove the cardboard
packaging.
•Remove the polythene cover and the polystyrene corner protection pieces.
•With the boiler still in the box, remove the boiler front cover panel screws “A” as described on page 7.
•Put the front cover panel safely aside to avoid damage.
•With the front cover panel removed, the two panel bottom retaining tabs on the casing can be
seen - these can be sharp and care must be taken when lifting the boiler.
•With help from another person, lift the boiler from the packaging holding the lipped front edges of the
side panels.
•Do not lift or carry the boiler using the top automatic air vent and bottom pump.
The weight of this
boiler is 36Kg, which
could present a risk of
injury.
Care should be taken
when loading and
unloading the boiler to
and from vehicles.
We recommend that
the boiler be handled
by two people until it is
securely fixed to a wall.
The safest route from
the vehicle to the point
of installation should be
carefully assessed
before unloading the
boiler.
Mechanical lifting aids
should be utilised
whenever possible.

USER INSTRUCTIONS
4
User Data
All user controls are situated on the front panel of the
boiler, there are no user controls inside the boiler
casing. The following instructions assume that the
boiler has been commissioned, and that the system is
filled with water and has been fully vented.
Setting Up
•Before switching on any electrical supplies to the
boiler ensure that the combined temperature and
pressure gauge reads at least 1 bar and the control
thermostat is set to the desired temperature.
•If an internal time clock is fitted ensure that this is
switched on (see “Optional Internal Time Clock”)
and if any other auxiliary controls are fitted e.g.
programmer, room thermostats, cylinder thermostats
etc, consult appropriate manufacturers' instructions
to switch these on.
•Switch on any local means of isolation to boiler.
•Switch the boiler on using the ON/OFF switch (the
red neon light on the switch should now glow).
•Turn on both power level switches - after a short
period of time the boiler temperature should start
to rise, indicated by the combined temperature
and pressure gauge. If the boiler fails to operate,
the overheat safety thermostat should be checked.
Access to the thermostat reset button is obtained
by unscrewing (anti-clockwise) the domed button
cover on the front panel (a screwdriver is not
required).The reset button can then be seen - press
the button, a click should be heard and the button
is reset. If no click was heard the device is not at
fault and further investigation is required by a
suitably qualified engineer.
•The internal clock or external programmer can
now be set to allow on/off periods as desired.The
ON/OFF switch and 2 power level switches should
be left in the ON position during normal use.
NOTE : the power level switches will automatically
switch on and off during normal boiler operation,
depending on boiler temperature.
•If the boiler is not in regular daily use during cold
periods, it is recommended that it be fitted with a
frost sensing thermostat to override the timeclock
and prevent the system from freezing.
•As with most boilers and heating appliances the
casing and pipework can get hot during normal
running so the boiler must not be covered and the
surrounding area must be kept clear.
Optional Internal Timeclock
•This operates on a 24-hour sequence. Around
the outside of the clock there are a number of
white tabs - these allow 15 minute switching
times. To set a boiler cycle simply push outwards
the number of tabs required for your heating
period.
Remember : tab OUT = BOILER ON
tab IN = BOILER OFF
The time of day is marked by an arrow on the
inner part of the clock - set the outer time to
coincide with this arrow.
On the centre part of the clock there is a switch.
This has three positions :
•Switch down - timeclock off
•Switch middle - timeclock timed (normal position)
•Switch up - timeclock on constant.
1
2
3
4
ON / OFF switch
Power levels switch
Control
thermostat :
4 = 85° - 75°
3 = 75° - 65°
2 = 65° - 55°
1 = 55° - 45°
Manual reset high
limit thermostat
Combined temperature
and pressure gauge
Optional internal timeclock

ELECTRICAL SPECIFICATION
5
The electrical installation of this boiler including cable sizes and protection devices and switches must comply
with the current IEE Regulations.
BOILER TYPE ETS 09 ETS 09 ETS 15 ETS 15 ETS 24
Single phase Tri phase Single phase Tri phase Tri phase
Code 00608708 00608808 00608908 00609008 00609108
Gas Council N° EB 052 01 EB 052 01 EB 052 02 EB 052 02 EB 052 03
kW RATING (based upon 230 volts)
STAGE 1 POWER RELAY 1 (kW) 2.8 4.2 4.8 7.2 7.2
STAGE 1 POWER RELAY 2 (kW) 2.8 - 4.8 - 7.2
STAGE 2 POWER RELAY 1 (kW) 2.8 4.2 4.8 7.2 7.2
TOTAL kW 8.4 8.4 14.4 14.4 21.6
See table below
NOMINAL VOLTAGE 230 V / 50 Hz 400 V / 50 Hz 230 V / 50 Hz 400 V / 50 Hz 400 V / 50 Hz
Power variation (kW) relative to voltage
BOILER TYPE ETS 09 ETS 09 ETS 15 ETS 15 ETS 24
Single phase Tri phase Single phase Tri phase Tri phase
220 V 7.6 - 13.1 - -
230 V 8.4 - 14.4 - -
240 V 9.0 - 15.6 - -
3 x 380 V - 7.6 - 13.1 19.5
3 x 400 V - 8.4 - 14.4 21.6
3 x 415 V - 9.0 - 15.6 23.3
(*) Only 9 used 1 spare.
Technical Data
MODEL ETS 09 ETS 09 ETS 15 ETS 15 ETS 24
Single phase Tri phase Single phase Tri phase Tri phase
Code 00608708 00608808 00608908 00609008 00609108
Gas Council N° EB 052 01 EB 052 01 EB 052 02 EB 052 02 EB 052 03
Nominal output (kw) 8.4 8.4 14.4 14.4 21.6
Height (mm) 720 720 720 720 720
Width (mm) 430 430 430 430 430
Depth (mm) 300 300 300 300 300
Weight empty (kg) 36 36 36 36 36
Weight full (kg) 49 49 49 49 49
No of elements 666610(*)
Element 1400 Watts 1400 Watts 2400 Watts 2400 Watts 2400 Watts
Water capacity (L) 13 13 13 13 13
Primary expansion vessel capacity (L) 88888
Primary connections BSP 3/4” 3/4” 3/4” 3/4” 3/4”
Max working pressure (bar) 33333
Primary pressure drop (mbar) 11225
Max temperature (˚C) 85 85 85 85 85
Nominal supply voltage (V) 230 3 x 400 + N 230 3 x 400 + N 3 x 400 + N
Nominal supply amps (total) 36 36 63 63 94
Nominal supply amps (per phase) 36 12 63 21 31
Protection against electric shock Class 1 Class 1 Class 1 Class 1 Class 1
IP rating IPX I IPX 1 IPX 1 IPX 1 IPX 1
ELECTRICAL SPECIFICATION

PUMP CHARACTERISTICS
6
DESCRIPTION
- Screwed end single head pump
- Manual 3-speed control
- Non-overloading single phase motor
WILO-STAR-RS 25/6 - 130 MM

INSTALLATION
7
720mm
720mm
430mm
300mm
WEIGHT
EMPTY FULL
36Kg 49Kg
430mm 300mm
Dimensions
Connecting to the System
The ETS boiler is designed to operate on a sealed
system (ie. no open vent or feed and expansion
cistern). Hot water expansion within the system is
taken up by the internal 8 litre expansion vessel.This
is suitable for systems up to 128 litres
capacity. If the system capacity is more than this then
an additional expansion vessel may be required.This
can be fitted external to the boiler at a convenient
place on the pipework.
Please note that the circulation pump is fitted to the
flow connection.
Safety Valve Connection
The boiler safety valve (set at 3 bar) must be piped
to drain using metallic pipe (eg. copper) minimum
size 15mm.
Frost Protection
The boiler is NOTfitted with frost protection. If the
boiler is being installed in a position where freezing
could take place, then a suitable external frost
thermostat should be fitted.

INSTALLATION
8
Mounting Boiler
•The boiler must be fixed to a non flammable wall.
•Observing the clearances shown below, drill 2 off 14mm x 100mm holes.
•Fit the 2 bolts supplied and hang the wall bracket.
•Fit washers and nuts
•Hang the boiler (see instructions on next page)
Clearances and Fixings
Minimum clearance
400mm
Minimum clearance
25mm
Minimum clearance
25mm
50
83
11
2020
295
215mm
145mm
Allow 100mm clearance below the boiler.
Ceiling

INSTALLATION
9
Panel Removal
To mount the boiler, first remove the front cover panel :
-undo screws marked (A)
-tilt panel towards you and lift clear.
Then hang the boiler by positioning the hooks on the boiler over the wall bracket.Take care to ensure that the
automatic air vent does not touch the bracket bolts.
The final fixing point can be found behind the pump - drill an appropriate hole and fit the bolt supplied together
with the washer and nut.
For future maintenance only (not required when fitting the boiler) :
-To remove the control panel, undo screws marked (B) and draw panel towards you taking care not to pull off
any connections to the rear of the panel.
-To remove the top cover, unscrew the automatic air vent then undo screws marked (C).
C
B
B
B
B
A
A

INSTALLATION
10
Pipework & System Connection
HEATING ONLY
Suitable connection point for mains
filling device Minimum size 15mm
Suitable connection point for mains
filling device Minimum size 15mm
Primary Flow
3/4" female
BSP
Primary Return
3/4" female
BSP
BOILER
"S" PLAN
"Y" PLAN
MM
M

INSTALLATION
11
E
bk
b
y
r
E
400 Volts
TP+N
Supply
g/y
4 Pole MCB
Contact separation
3mm min
This appliance must be
permanently connected to fixed
wiring and must be earthed.The
wiring must be carried out by a
competent person and be in
accordance with the current IEE
Wiring Regulations. 4 Pole
isolation must be provided with a
minimum contact clearance of
3mm.The 4 Pole MCB must be
readily accessible and adjacent to
the appliance.
Electrical Connections
400V TP+N Installation
Electrical Connections
230V - 240V SP+N Installation
This appliance must be
permanently connected to fixed
wiring and must be earthed.The
wiring must be carried out by a
competent person and be in
accordance with the current IEE
Wiring Regulations. 2 Pole
isolation must be provided with a
minimum contact clearance of
3mm.The 2 Pole MCB must be
readily accessible and adjacent to
the appliance.
g/y
E
230-240 Volts
Supply
E
bk
r
2 Pole MCB
Contact separation
3mm min

COMMISSIONING
12
Commissioning - Water
1.The system must be thoroughly cleansed prior to
connection of the boiler.The system water should be
treated to prevent general corrosion and deposition
of scale or sludge in the boiler, please refer to
BS7593. If installing the boiler onto an existing
system, ACV recommend that an approved system
cleaner is used.
2. Fill and pressurise the boiler and system to 1.5 bar,
making sure to vent the boiler via the automatic air
vent on top of the boiler. Note that the black dust
cap on the air vent should be left loose to allow the
auto vent to function.
3. Check for leaks.
For specialist advice on water treatment products,
contact:
Fernox, Britannia Works
Clavering, Essex CB11 4QZ
Te l 01799 550811
Commissioning - Electrical
The Electrical installation supplying this boiler must
conform to the current IEE Regulations.
1. Remove the front panel and check all electrical
connections for tightness.
2. Ensure all internal relays, contactors etc are secure
on the DIN rails.
3. Set all panel control switches to off.
4. Check the power stage delay timer settings -
Adjuster (A) is factory set to the 1 to 10 minute
position which is the optimum setting for the boiler
and should be verified during commissioning.
- Adjuster (B) is used to set the DELAY ON time of
the following stage contactors, the available settings
are in 1 minute increments if A is set to 1 to 10
minutes.
This function is particularly useful in areas where
gradual switching of electrical load is required and
the resulting maximum demand kept to a
minimum.The timers add to the flexibility of the
installation but must be optimised by a qualified
engineer.The normal setting is 1.
5. Set internal MCB to off position.
6. Set the control thermostat to desired temperature.
Starting the Boiler
1. Switch on the internal or external timeclock (if fitted)
2. Switch on internal MCB
3. Switch on local isolator to boiler
4.Turn the boiler on using the ON/OFF switch
5. Switch on the power levels switch stage 1, the first
stage contactors will energise
6. Switch on the power levels switch stage 2, after a
short delay the second stage contactors will
energise. Note: the power stage delay timer settings
should be verified as shown in item 4 under
"Commissioning - Electrical"
7.The boiler temperature will now rise as indicated
by the combined temperature and pressure gauge
8. The temperature will continue to rise until the
control thermostat temperature setting is reached
then the boiler will switch off.
Once these procedures have been followed the
system can be left to operate normally by the
following method.
1. Ensure that boiler thermostat is set to the desired
temperature
2.Turn the boiler on using the ON/OFF switch
3.Turn on power level switch 1
4.Turn on power level switch 2
5. Set timeclock (if fitted) and/or external controls
to desired boiler operating on/off times.
After one week of operation all electrical
connections should be re-checked for tightness and
the boiler water system checked for leaks and air
and rectified if necessary.
A
B

No. Description ACV Gas
Part council
number
11 Main boiler casing 21474065 E75-016
12 Control circuit MCB 54766015 E75-001
13 60A Terminals 54428179 E75-004
14 20 Way connector 54428199 E75-003
15 Expansion vessel 55301200 E75-010
16 Pressure safety valve 55426017 E75-008
17 Water pressure switch 557D3011 E75-009
-Boiler casing lid 21475052 E75-017
-Boiler casing front 21473052 E75-018
-Circulating pump 557A4009 E75-002
No. Description ACV Gas
Part council
number
1Control thermostat 54764014 E74- 998
2Panel control switches 54428116 E75-007
3Manual reset high
limit thermostat 54764009 E75-000
4Optional timeclock 54452000 E75-011
5Combined temperature
and pressure gauge 54441008 E74-998
6Control panel (no parts) 21477053 E75-015
7Automatic air vent 55445007 E75-014
8a Element ETS 9 54428183 E75-012
8b Element ETS 15/24 54428182 E75-013
920A Contactors 54452082 E75-005
10 Stage delay on timers 54428189 E75-006
1
2
3
4
COMPONENT REMOVAL AND REPLACEMENT
13
Parts Location and Numbers
6
13
245
7
8
9
10
16
17
14
13
12
11
15

COMPONENT REMOVAL AND REPLACEMENT
14
Part N
o
55
44
5007
Part N
o
5
442
8
1
82
5
442
8
1
83
Part N
o
2147
3052
Part N
o
21474
065
Part N
o
2147
5052
Part N
o
21477
053
Part N
o
5
47
660
1
5
Part N
o
5
442
8
17
9
Part N
o
5
442
8
19
2
Part
N
54452082
Part No
5
442
60
1
7
Part N
Part No 54428116
Part No
5
47
6
4
009
P
art N
o
5
47
6
4
0
1
4
Part N
o
5
44
5
2
000
P
art N
o
5530
12
00
Part N
o
55
7A4
00
9
Part N
o
5
4441
008
Part N
o
5
442
8
19
9

COMPONENT REMOVAL AND REPLACEMENT
15
Component Removal
(Not requiring boiler draining)
Control Thermostat
ACV Part No 54764014
GC Part No E74-998
1. Isolate all electrical supplies to the boiler and
remove the front panel fixing screws (2 off), then
remove the control panel screws (4 off) and let panel
hang forward.
2. Pull thermostat knob off the shaft and remove
Phillips screws (2 off) holding bezel to panel.
Disconnect the push-on electrical connectors from
the thermostat body and remove from rear of panel.
3. Remove the capillary tube retaining clip from the
control thermostat pocket next to elements,
carefully remove the thermostat bulb.
4. Reverse the procedures to replace components.
Manual Reset High Limit Thermostat
ACV Part No 54764009
GC Part No E75-000
1. Isolate all electrical supplies to the boiler and remove
the front panel fixing screws (2 off), then remove the
control panel screws (4 off) and let panel hang
forward.
2.Turn the black slotted domed cover on the control
panel anti-clockwise and remove the lock nut holding
the thermostat to the panel. Disconnect the push-on
electrical connectors from the thermostat and
remove the thermostat from the rear of the panel.
3. Remove the capillary tube retaining clip from the
high limit thermostat pocket next to elements,
carefully remove the thermostat bulb.
4. Reverse the procedures to replace components.
Combined Temperature and Pressure Gauge
ACV Part No 21477053
GC Part No E74-999
1. Isolate all electrical supplies to the boiler and
remove the front panel fixing screws (2 off), then
remove the control panel screws (4 off) and let panel
hang forward.
2. Remove the capillary tube retaining clip from the
thermostat pocket next to elements, carefully
remove the thermostat bulb.
3. Undo the 14mm pressure gauge capillary nut on
the pressure safety valve. Take care not to remove
the miniature ball check valve. A small droplet of
water may appear, this is normal.
4. Remove the gauge from the front of the control
panel.
5. Reverse the procedures to replace components.
Timeclock
ACV Part No 54452000
GC Part No E75-011
1. Isolate all electrical supplies to the boiler and
remove the front panel fixing screws (2 off), then
remove the control panel screws (4 off) and let panel
hang forward.
2. Disconnect the push-on electrical connectors
from the timeclock.
3. On the front of the timeclock turn the 2 plastic
slot screws anti-clockwise and pull the clock from
the front of the panel.
4. Reverse the procedures to replace components.
Panel Control Switches
ACV Part No 54428116
GC Part No E75-007
1. Isolate all electrical supplies to the boiler and
remove the front panel fixing screws (2 off), then
remove the control panel screws (4 off) and let panel
hang forward.
2. Disconnect the push-on electrical connectors
from the rear of the switch.The switches are push fit
through the front of the panel so must be pushed
out from the back of the panel.
3. Reverse the procedures to replace components.

COMPONENT REMOVAL AND REPLACEMENT
16
Component Removal
(requiring boiler draining)
Expansion Vessel
ACV Part No 55301200
GC No E75-010
1. Isolate all electrical supplies to the boiler.
2. Drain the heating system, (if isolating valves are
fitted immediately below the boiler, then only the
boiler requires draining).
3. Remove the vessel retaining bracket screws (2 off).
4. Undo the union on the top of the vessel and
remove vessel from the boiler casing.
5. Reverse the procedures to replace the components.
Water Pressure Switch
ACV Part No 557D3011
GC No E75-009
1. Isolate all electrical supplies to the boiler.
2. Drain the heating system, (if isolating valves are
fitted immediately below the boiler, then only the
boiler requires draining).
3. Undo the 14mm pressure gauge capillary retaining
nut and coupling from the pressure safety valve and
pull aside the capillary tube.
4. Using a slim 14mm spanner on the brass part of
the switch, remove the switch from the tee fitting -
do not use any tools on the main switch body.
5. Using a suitable jointing compound, reverse the
procedures to replace the components taking care
to ensure that the jointing compound does not
enter the pressure switch.
Pressure Safety Valve
ACV Part No 55426017
GC No E75-008
1. Isolate all electrical supplies to the boiler.
2. Drain the heating system, (if isolating valves are
fitted immediately below the boiler, then only the
boiler requires draining).
3. Undo the 14mm pressure gauge capillary retaining
nut and pull the tube aside.
4. Remove the discharge pipe from the valve body.
5. Remove the two 17mm nuts holding the electrical
component mounting plate, and move the plate to
the right just enough to enable the anti-clockwise
removal of the pressure safety valve.
6. Using a suitable jointing compound, reverse the
procedures to replace the components taking care
to ensure that the jointing compound does not
enter the safety valve.
Automatic Air Vent
ACV Part No 55445007
GC No E75-014
1. Isolate all electrical supplies to the boiler.
2. Drain the heating system, (if isolating valves are
fitted immediately below the boiler, then only the
boiler requires draining).
3. Using a 17mm spanner remove the automatic vent
and check valve.
4. Using a suitable jointing compound, reverse the
procedures to replace the components taking care
to ensure that the jointing compound does not
enter the automatic air vent.
5. Remember to leave the black dust cap on the
automatic air vent loose to allow correct operation
of the vent.
Circulating Pump
ACV Part No 557A4009
GC No E75-002
1. Isolate all electrical supplies to the boiler.
2. Drain the heating system, (if isolating valves are
fitted immediately below the boiler, then only the
boiler requires draining).
3. Undo the pump unions above and below the
pump, remove the pump.
4. Reverse the procedures to replace the components
ensuring that the pump union gaskets are fitted to
each end of the pump.

COMPONENT REMOVAL AND REPLACEMENT
17
B
B
B
C
C
B
Procedure For Element Removal
1. Switch off all electrical supplies to the boiler and
remove the panels.
2. Drain the boiler.
3. Disconnect the push-on electrical connectors
from the elements taking note of the connecting
order.
4. Use a 17mm socket to undo the four nuts from the
element retaining plates (C) and remove the plates.
5. Use a socket to slacken the 10mm nut (A) and
remove. Push the 10mm bolt into the boiler body
(note: the bolt is captive and will not fall into the
boiler body). This will de-compress the element
gasket enabling the element to be withdrawn from
the boiler.
6. Insert new element/s.
7. Refit the two element retaining plates (C) and
nuts (B), tighten nuts (B). Then tighten the 10mm nut
on the element until the gasket is compressed and
the element is tight in the boiler body.
8. Reconnect the push-on electrical connectors.
Important - ensure that the connections are tight.
9. Refill the system and pressurise to 1 bar ensuring
that ALL the air is removed from the system and
boiler.
10. Reinstate the electrical supply and set the boiler
thermostat to 40˚C.
11. Run the boiler for approx 30min at this
temperature checking for leaks around the element
gaskets.
12. Check again for air in the system and the boiler,
and vent if necessary. Set the timeclock and boiler
thermostat appropriately.
13. Remember to leave the black dust cap on the
automatic air vent loose to allow correct operation
of the vent.
Heating Elements
ETS 09
ACV Part No 54428183
GC No E75-012
ETS 15 and ETS 24
ACV Part No 54428182
GC No E75-013

WIRING DIAGRAMS - ETS 09-15 Single phase : Control Circuit
18
3 amp
MCB
230 - 240 V ac
Panel
On Off
Switch
High Temp
Limit
(manual reset)
Water
Pressure
Switch
Panel
Stage 1
Switch
Stage 1
Delay
Timer
Stage 1
Power
Relay 2
Stage 1
Power
Relay 1
Boiler Stat
(85 - 60
°
C)
Boiler Stat
(78 - 53
°
C)
Panel
Stage
2
Stage 2
Power
Relay 1
Optional
Clock
Switched
Contacts
1
3
4
7
8
C
2
C
2.1.
2.2.
1.
1.2
A1
A2
1
2
1
10
11
12
13
14
15
Switch
Indicator
Switch
Indicator
Switch
Indicator
Circulating
Pump
r
br
br
o
o
o
o
y
v
y
gr
r
r
r
r
r
w
w
w
w
17
Optional Internal -
External Clock
Supply
16
9
br
bk
6
5
w
All bold numbers indicate a DIN rail terminal connection
b
b
b
b
b
b
b
b
bk
2
PLEASE NOTE: Due to the potential risk of ELECTRIC SHOCK this section of the manual is intended for
use by a service engineer or qualified electrician, not the user.
ETS 09-15 Single phase : Control Circuit
Cable colour codes b-blue bk - black br - brown r-red w-white y-yellow o-orange v-violet p-pink gr - grey

WIRING DIAGRAMS - ETS 09-15 Tri phase : Control Circuit
19
3 amp
MCB
230 - 240 V ac
Panel
On Off
High Temp
Limit
(manual reset)
Water
Pressure
Switch
Panel
Stage 1
Switch
Stage 2
Delay
Timer
Stage 1
Power
Relay 1
Boiler Stat
(85 - 60
°
C)
Boiler Stat
(78 - 53
°
C)
Panel
Stage 2
Switch
Stage 2
Power
Relay 1
Optional
Clock
Switched
Contacts
1
3
4
7
8
C
2
C
2.1.
2.2.
1.1.
1.2.
A1
A2
1
2
1
10
11
14
15
Switch
Indicator
Switch
Indicator
Switch
Indicator
Circulating
Pump
r
br
br
o
o
o
y
v
gr
r
r
r
r
w
w
w
w
17
Optional Internal -
External Clock
Supply
16
9
br
bk
6
5
w
All bold numbers indicate a DIN rail terminal connection
b
b
b
b
b
b
b
bk
2
p
Tri phase : Control Circuit ETS 09-15
PLEASE NOTE: Due to the potential risk of ELECTRIC SHOCK this section of the manual is intended for
use by a service engineer or qualified electrician, not the user.
Cable colour codes b-blue bk - black br - brown r-red w-white y-yellow o-orange v-violet p-pink gr - grey