OSO HOTWATER Super Xpress SX iQ Series User manual

142228-02 - 08-2019
Super Xpress - SX iQ
120-150-180-210-250-300 l.
EN
SAFETY INFORMATION
O&M INFORMATION
INSTALLATION MANUAL
TDS - TECHNICAL DATA SHEET

2
CONTENTS
1. General information
1.1 Product identification..........................................4
1.2 CE Marking. ............................................................4
1.3 ErP data......................................................................4
1.4 General information ...........................................4
1.5 Handling. ..................................................................5
1.6 Clearances. ...............................................................5
2. lnstallation.
2.1 Health and safety regulations ........................ 6
2.2 Siting the Super SX .............................................6
2.3 Component check Iist........................................ 6
2.4 Supply requirements .........................................6
2.5 Expansion vessels. ..............................................6
2.6 Wall mounting .....................................................6
2.7 Preliminary wiring................................................ 7
2.8 Pipework...................................................................7
2.9 Electrical connections ........................................7
2.10 Pipe connections................................................8
2.11 Vessel connections ...........................................8
2.12 Remove the template .....................................8
2.13 Combination valve ...........................................8
2.14 Cold mains supply. ...........................................8
2.15 Hot water outlet .................................................8
2.16 Balanced cold water supply. ........................8
2.17 Expansion vessel (300 litre) .......................... 8
2.18 Flexible Y. Hose ...................................................8
2.19 Tundish....................................................................8
2.20 Secondary return...............................................8
2.21 Discharge pipe.....................................................9
3. Commissioning
3.1 Commissioning and filling. ............................. 9
3.2 Draining ....................................................................9
3.3 System flushing ...................................................9
4 Electrical installation
4.1 lmmersion heaters. ............................................ 10
4.2 Wiring of immersion heaters ...................... 10
4.3 Smart control settings. ................................... 12
4.4 Smart technology. ............................................. 13
4.5 Smart control RED LED indicator .............. 14
4.6 Software reset. .................................................... 14
4.7 Anti-Legionella Cycle ...................................... 14
4.8 Smart control OFF PEAK function ............ 14
4.9 Smart control power supply ....................... 14
4.10 Smart control technical data ..................... 15
Symbols used in this manual:
!
WARNING Could cause serious injury
or death
!
CAUTION
Could cause minor or
moderate injury or damage
to property
DO NOT
!
DO
!
This document should be kept in a
suitable place where it is accessible for
future reference.
5. Safety and servicing
5.1 Safety cut out........................................................ 16
5.2 Intermittent discharge from tundish ...... 16
5.3 Continuos hot discharge from tundish .16
5.4 Expansion vessel maintenance .................. 16
5.5 Guarantee. ............................................................ 16
5.6 Service procedure ............................................. 16
5.7 Combination valve ........................................... 17
5.8 Drain cock ............................................................. 17
5.9 Alternative discharge. ...................................... 17
6. OSO fault finding guide .................................... 18
7. Technical specification
Commissioning and service logbook ............ 19
Service interval record.............................................23
8. Guarantee conditions
Guarantee......................................................................22
8.1 Customer service ................................................22
9. Removing the product
9.1 Removal...................................................................22
9.2 Returns scheme ..................................................22

3
Safety instructions
• Read the following safety instructions
carefully before installing, maintaining or
adjusting the water heater.
• Personal injury or material damage may
result if the product is not installed or
used in the intended manner.
• Keep this manual and other relevant doc-
Safety instructions for installers
!
WARNING
The overflow from the safety valve must NOT be sealed or plugged.
!
Discharge must comply with current building regulations.
!
Fixed electric fittings should be used for installation in new homes or when changing an
existing electrical setup in accordance with regulations.
!
The mains cable should withstand 90°C. A cable clamp/strain reliever must be fitted.
!
The product should be filled with water before the power is switched on.
!
The relevant regulations and standards, and this installation manual, must be followed.
Safety instructions for users
!
WARNING
The overflow from the safety valve must NOT be sealed or plugged.
The product must NOT be covered over the cover on the front.
The product must NOT be modified or changed from its original state.
Children must NOT play with the product or go near it without supervision.
!
The product should be filled with water before the power is switched on.
!
Maintenance/settings should only be carried out by persons over 18 years of age, with
sufficient understanding
!
CAUTION
The product must not be exposed to frost, over-pressure, over-voltage or chlorine treat-
ment. See warranty provisions.
Maintenance/settings should not be carried out by persons of diminished physical or
mental capacity, unless they have been instructed in the correct use by someone respon-
sible for their safety.
!
CAUTION
!
The cylinder must be installed complying with current building regulations. Liability for
consequential damage will only apply if this is followed.
!
The product should be properly aligned vertically and horizontally, on a floor or wall suit-
able for the total weight of the product when in operation. See type plate.
!
The product must have a clearance for servicing of 400 mm in front of the immersion cover
/ 150 mm above cylinder.
uments where they are accessible for fu-
ture reference.
• The manufacturer assumes compliance
(by the end-user) with the safety, oper-
ating and maintenance instructions sup-
plied and (by the installer) with the fitting
manual and relevant standards and regu-
lations in effect at the date of installation.
This OSO product is certified according to building and water regulations by
KIWA Watertec Ltd. Tel: [phone] • Email: [email protected]

4
1. GENERAL INFORMATION
1.1 Product Identification
Identification of your product can be found on
the label attached to the product. The label con-
tains information about the product according to
EN 12897: 2016 and EN 60335-2-21, in addition to
other useful data. See Declaration of Conformity
at www.osohotwater.com for more information
OSO products are designed and manufactured
according to:
• Tank standard EN 12897:2016
• Safety standard EN 60335-2-21
• Welding standard ISO 3834-2
OSO Hotwater AS is certified according to
• Quality ISO 9001
• Environment ISO 14001
• Working Environment ISO 45001
1.2 CE conformity
The CE mark shows that the product complies
with the relevant standards. See Declaration of
Conformity at www.osohotwater.co.uk for more
information.
The product complies with he directives for:
• Low Voltage Directive LVD 2014/35/EU
• Electromagnetic Compatibility EMC 2014/30/EU
• Pressure Equipment Directive PED 2014/68/EU
1.4 General information
Thank-you for purchasing the OSO Super SX un-
vented hot water cylinder. Designed to be simple
and neat to install, the Super SX differs from oth-
er unvented cylinders in that all of the principle
connections, including hot and cold water pipes
and expansion vessel are connected to the top
of the cylinder. Full size template is provided to
facilitate pipe positioning.
OSO advise that the connecting pipes and elec-
trical cables are fixed in place prior to the posi-
tioning of the cylinder. Moving the cylinder into
position should be the last thing done before
connection of pipes and commissioning of the
cylinder.
This manual gives detailed advice for installation
and should be read carefully prior to fitting any
unvented unit. OSO Super SX cylinders are not
suitable for gravity fed primary systems. In known
hard water regions, precautions should be tak-
en to prevent limescale formation in hot water
cylinders, in accordance with Building Regulation
Part L, Domestic Heating Compliance Guide.
This OSO cylinder must be installed by a com-
petent person and be installed in compliance
with the OSO Installation and Maintenance In-
structions, all current legislation, codes of prac-
tice and regulations governing the installation of
unvented hot water cylinders in force at the date
of installation.
1.3 ErP data - Technical Data Sheet
Trade mark M T.
item no. Model/identifier ErP profile
ErP
Rating
Energy
eff. %
AEC
kWh/a
Th. stat
setting
Storage
volume L
OSO Hotwater AS 10802651 SX120 - 2.8kW @ 230V/3.0kW @ 240V iQ M C 38 1336 70 111
OSO Hotwater AS 10802652 SX150 - 2.8+2.8kW @230V/3.0+3.0kW @ 240V iQ L C 38 2670 70 143
OSO Hotwater AS 10802653 SX180 - 2.8+2.8kW @230V/3.0+3.0kW @ 240V iQ L C 40 2559 70 164
OSO Hotwater AS 10802654 SX210 - 2.8+2.8kW @230V/3.0+3.0kW @ 240V iQ L C 39 2641 70 193
OSO Hotwater AS 10802655 SX250 - 2.8+2.8kW @230V/3.0+3.0kW @ 240V iQ XL C 39 4298 70 242
OSO Hotwater AS 10802656 SX300 - 2.8+2.8kW @230V/3.0+3.0kW @ 240V iQ XL C 39 4325 70 281
Directive: 2010/30/EU Regulation: EU 812/2013 Directive: 2009/125/EC Regulation: EU 814/2013
Water heater efficiency according to standard: EN 50440: 2015
TDS - Technical Data Sheet - Direct electric water heater - ErP data

5
1.5 Handling, location and positioning
The product should be transported carefully as
shown, with packaging. Use the handles in the
box.
1.6 Clearances
!
CAUTION
Tappings, valves etc. should not be used to
lift the product as this could cause malfunc-
tion.
!
CAUTION
!
The cylinder must be installed complying with current building regulations.
!
The product should be placed in a dry and permanently frost-free position.
!
The product should be placed on a floor or wall suitable for the total weight of the prod-
uct when in operation. See type plate.
!
The product must have a clearance for servicing of 400 mm in front of the immersion cover
/ 150 mm above cylinder.
!
The product should be easily accessible in the home for servicing and maintenance.
Min. 150 mm
Min. 400 mm
Min.
400 mm

6
2. INSTALLATION
2.1 Health and safety regulations
Handling Operations Regulations 1992 defines
manual handling as: “any transporting or support-
ing of a load (including the lifting, putting down,
pushing, pulling, carrying or moving thereof by
hand or bodily force”. The Regulations set no spe-
cific requirements such as weight limits. However
common sense still has to be used based on an er-
gonomic approach for each individual. The Super
SX should be transported and stored in a vertical
position.
2.2 Siting the Super SX
The cylinder should not be positioned un-
til the connecting pipework and cables are
fitted. There are few restrictions on the siting of
the OSO Super SX, however it should not be sited
anywhere open to frost attack. The unit should be
placed on a stable flat surface capable of with-
standing the weight of the cylinder when full (see
table on page 20) and access must be allowed for
maintenance purposes. Prior to positioning the
cylinder, wind out the feet in the base to protrude
by 10 mm (35 mm if using optional wall bracket). If
wall mounted with an OSO wall bracket, the wall
should be capable of withstanding the forces gen-
erated by the weight of the full cylinder. Provision
should also be allowed for the routing of the dis-
charge pipe away from the cylinder to an outside
point according to building regulation G3.
2.3 Component check list
Components supplied with the unit in a separate
accessory kit for site fitting:
• Expansion vessel with wall bracket (300 l. only)
• Tundish (incl. screws)
• Plastic cable clamp
Components factory fitted:
• Expansion vessel(s) with T piece connector
• Flexible hose for expansion vessel
• Combination valve, includes line strainer,
pressure reducing valve, balanced cold water
connection (for shower or bidet only), blank-
ing cap for balanced cold water connection,
temperature & pressure relief valve and hot
water blending valve.
Documentation supplied:
• Installation manual & service logbook
• Template for connecting pipework
• Immersion heater(s) - 3 kW
• Thermostat(s) / thermal cut-out
• Drain cock
• Lid for cylinder.
2.4 Supply requirements
An uninterrupted 22 mm cold water mains supply
is recommended, however if only a 15 mm supply is
available, this may be used provided there is suffi-
cient flow rate available. A minimum standing pres-
sure of 2.5 bar and a flow rate of 20 litres per minute
with a 1 bar dynamic pressure is recommended. The
cylinder will operate at lower pressures and flow
rates however the performance will be compro-
mised. The OSO unvented unit is designed for use
with supply pressure up to 8 bar. For pressures
over 8 bar an additional pressure reducing valve
must be fitted in the supply pipe to the unit.
2.5 Expansion vessel
Super SX 120-250: Twin expansion vessels
(single on 120) are factory fitted to the multi-
function valve using the supplied flexible hose.
SuperSX 300: An external expansion vessel is pro-
vided to be connected to the multifunction valve.
The vessel(s) accommodate expanded water when
the cylinder is heated and prevents the cylinder
reaching its maximum working pressure.
2.6 Wall mounting
Wall mounting brackets are available for OSO un-
vented units Super SX 120-180.
210

7
Tail lengths from wall Above Below
Cold feed in 202 242
Hot water out 274 314
Balanced cold water out 188 228
No. Description Dim.
1 Domestic hot water outlet (DHW out) ø22 mm
2 Balanced cold water connection (Bal. CW) ø22 mm
3 Cold water main supply inlet (CW in) ø22 mm
4 Line strainer -
5 Pressure reducing valve - 3 bar -
6 Expansion relief valve - 8 bar 1/2”
7 Hot water blending valve -
8 Temp&pressure relief valve - 90°C / 10 bar 1/2”
9 Flexible hose and T-piece (120-250 l. only) -
10 Expansion vessel(s) (120-250 l. only) -
11 Flexible Y-hose -
12 Tundish -
13 Expansion vessel connection point
1/2” BSPM
1 2
3
5
7
8
11
12
13
6
1010 9
4
2.7 Preliminary wiring
Before final installation and pipe fitting it is recom-
mended to feed the electrical wires to the electri-
cal box. The OSO Super SX is provided with two
channels in the base to feed electrical cables to
the cylinder. The channels run diagonally from the
front centre to the rear left and right, and ensures
a neat installation with minimum visible cabling.
When the cylinder is moved into position remove
the electrical box covers. The power cables should
be fed up from the base channels into the electri-
cal box. When cables are connected they must be
secured using the cable clamp (1) supplied in the
fittings bag.
Use only a suitable heat resistant round cable
with a minimum rating of 90°C compliant to BS
EN 50525-1, for example H05V2V2-F (309-Y) ac-
cording to BS EN 50525-2-11. Cables should be
sufficient length to reach from the junction box
through the base channels and leave an amount of
tail from the front of the cylinder sufficient to reach
the electrical connection point.
For more information about electrical installations
see chapter 4. ELECTRICAL INSTALLATION.
2.8 Pipework
The OSO Super SX has all pipework connections
at the top of the cylinder with these pipes secured
to the rear wall. A template is provided to assist in
the placement of these pipes. Decide where the
cylinder is to be positioned and secure the wall
template with the cross on the back wall at least
326 mm from the left wall.
Ensure the cylinder feet are wound out to pro-
trude correct amount. Refer to included template
to position the cross at the correct height above
the base for the appropriate capacity of the cyl-
inder. Please note that if the cylinder is raised on
its feet or on a plinth higher than floor level, the
height of the template above the floor will need
to be raised accordingly.
The connecting pipe tails should be fitted so they
reach out away from the back wall horizontally,
perpendicular to the wall and parallell with each
other. The table below shows the exact lengths
these tails should be cut from wall to reach the
cylinder connections. If pipes are clipped up the
back wall behind the cylinder position, the tails
should be longer. Use the lengths marked ‘be-
low’. If the pipes approach the template points from
above/side, use the lenghts marked ‘above’.
OSO recommend that the discharge pipe should be
located at the left side of the cylinder.

8
2.10 Pipe connections
Before connecting the cold supply (3), flush the
cold supply pipework of all flux and debris. Lift off
the cylinder lid to allow access to the combina-
tion valve and other connections.
2.11 Vessel connections
Check the expansion vessel(s) and hose connec-
tions are tight. SX 300: Fit the expansion vessel
and bracket on a suitable wall close to the cyl-
inder.
2.12 Remove the template
Position the cylinder to meet the heating and do-
mestic water pipes.
2.13 Combination valve
The combination valve at the top of the cylinder
is factory fitted and is water-tight. If necessary it
can be rotated in either direction to suit the con-
necting pipework, up to half a turn without losing
its seal.
2.14 Cold mains supply
Connect the cold mains supply to the combi-
nation valve cold feed (see illustration below).
The OSO unvented unit is designed for use with
supply pressure up to 8 bar. For water pressures
above 8 bar an additional pressure reducing valve
must be fitted to the cold water supply pipe.
2..15 Hot water outlet
Connect the hot water distribution pipe to the
combination valve hot water outlet (see illustra-
tion).
2.16 Balanced cold water supply (optional)
If no balanced cold supply is required, tighten the
supplied blanking cap.
!
Do not use the balanced cold connection
to feed any outlets other than mixer showers.
Under no circumstances use the balanced cold
connection to feed all cold water outlets as
this practice contravenes Section 10 of water
regulations.
!
If a balanced mains pressure cold water supply is
required to a shower or bidet (over rim type only,
ascending spray type requires type AA, AB or AD
air gap), remove blanking cap and connect to the
shower or bidet cold supply (2) on the combina-
tion valve. Major shower manufacturers advise
fitting a mini expansion vessel in the balanced
cold supply pipework to accommodate thermal
expansion and prevent tightening of shower con-
trols.
2.17 Expansion vessel (300 l. only)
Site the expansion vessel on the wall using the
supplied bracket and connect to the expansion
vessel connecting point (13) on the multifunction
valve with copper pipe.
2.18 Flexible Y-hose
The flexible Y-hose (11) is preformed to the cor-
rect shape. Connect the inlet ends to the expan-
sion relief valve (6) and the temperature and
pressure relief valve (8).
2.19 Tundish
Recommended position of the tundish (12) is to
the left of the cylinder as seen from the front.
Connect the tundish inlet to the outlet end of the
flexible Y-hose (11). Tundish should be visible and
positioned away from electrical devices. Tundish
can be secured with supplied screws.
2.20 Secondary return (optional)
If a secondary return is connected reduce ther-
No. Description Dim.
1 Domestic hot water outlet (DHW out) ø22 mm
2 Balanced cold water connection (Bal. CW) ø22 mm
3 Cold water main supply inlet (CW in) ø22 mm
1 2
3
13
8
11
12
6

9
mostat settings to ‘smart -’ (if you require water
to remain at 70 an additional potable expan-
sion vessel is required) A secondary return can
be connected via the expansion vessel connec-
tion to the combination valve. Remove the hose,
connect a short length of 15 mm copper tube, fit
a T piece, connect in the secondary return and
reconnect the expansion vessel hose to the re-
maining T piece outlet. An additional expan-
sion vessel will be required if the secondary re-
turn ‘loop’ exceeds 10% of the cylinder capacity.
1 metre of 22 mm pipe holds approximately 1/3
litre of water. 15 mm pipes carry approximately
half that volume. Secondary return must be
pumped by a bronze pump and fitted with non
return valves to ensure correct direction of flow.
2.21 Discharge pipe
Connect the tundish outlet to the discharge pipe.
Install the tundish in a vertical position within a
maximum of 500 mm from the Temperature and
Pressure Relief Valve drain connection. Ensure
the expansion relief pipework discharges through
the tundish. Tundish pipework must be 22 mm
with a minimum vertical length of 300 mm below
tundish. Maximum permitted length of 22 mm
pipework is 9 m.
Each bend or elbow is equivalent to 0.8 m of
pipework. All pipework must have continous fall
and discharge in a safe, visible position. If any
doubt, refer to Building Regulation G3. Discharge
pipe must be dedicated to the cylinder and must
not be used for any other purpose.
3. COMMISSIONING
3.1 Commissioning and filling
1. Check all connections for tightness. Open hot
water tap furthest away from the OSO water
heater.
2. Open the mains stop cock to fill the water
heater. When water flows evenly from tap, al-
low to run for a few minutes to flush through
any dirt, swarf or residue, then close the tap.
Open successive hot taps to purge any re-
maining air.
3. Check all water connections for leaks and rec-
tify if necessary.
4. Manually operate Expansion relief valve (6)
(see illustration on previous page) to ensure
free water flow through discharge pipe by
turning knob counter-clockwise. To close
continue to turn counter-clockwise until the
valve shuts.
5. Manually operate Temperature and Pressure
Relief Valve (8) (see illustration on previous
page) to ensure free water flows through dis-
charge pipe (Turn knob counter-clockwise).
6. Switch electrical power on.
7. Replace the cylinder lid – this is important as
the lid prevents heat loss from the cylinder
and combination valve, conserving valuable
energy. Do not place heavy objects on the lid.
3.2 Draining
Switch off the electrical power (important to avoid
damage to element). Turn off the cold water sup-
ply valve. Open hot water tap. Open drain at base
of cylinder using a 6 mm hex key. The unit will
drain. Draining process may be speeded up by
opening the temperature and pressure relief valve.
An internal ø18 mm hose can be applied to bot-
tom drain cock to lead the water to a gully, sink
or similar.
3.3 System flushing
System flushing will not be necessary under nor-
mal circumstances as the line strainer will prevent
ingress of foreign materials, however if flushing is
required, run at least 50 litres of water from the
cylinder at the highest possible flowrate. Close the
taps and follow draining procedure above.

10
4. ELECTRICAL INSTALLATION
4.1 Immersion heaters
Power to immersion heaters should not be switched
on until the unit is filled with water. All units are fit-
ted with 2 no. 3 kW immersion heaters except SX
120 which has 1 no. 3kW immersion heater. Immer-
sion heaters must be wired through the factory fit-
ted thermostat and thermal cut-out according to
diagram on the reverse of the electrical box cover.
Alternative thermostats should not be used, regula-
tions require immersion heaters on unvented cylin-
ders to be connected with a thermal cut-out.
4.2 Wiring of immersion heaters & thermostats
Follow the wiring instructions connecting the line,
neutral and earth as indicated. A dedicated perma-
nent supply complying with current IET regulations
should be used, and each circuit must be protected
by a suitable fuse and double pole isolating switch
with a contact separation of at least 3 mm in both
poles. All electrical wiring should be carried out by
a competent electrician and be in accordance with
the latest Edition of IET (formerly IEE) Wiring Regu-
lations.
Use only a suitable heat resistant round cable with
a minimum rating of 90°C, for example H05V2V2-F
(309-Y). All internal wiring is factory mounted.
Upper immersion thermostat (ThermODisc)
The recommended screw torque is 0.2 kp (2.0Nm).
End terminal fork width must not exceed 10 mm,
see illustration.
A safety cut-out is also incorporated within the
upper thermostat and will operate at 85°C ± 3°C.
Should this happen, check reasons for thermal cut-
out button being released and when satisified press
the reset button. Important: Before resetting the
safety cut-out or altering the thermostat setting,
isolate electrical supply to the unit prior to removal
of the lid. Ensure the lid to the electrical box is re-
placed correctly and the retaining screw is fitted.
Bottom immersion thermostat:
The 80323 thermostat for 120 litre and 80322 ther-
mostat for all other sizes with embedded iQ Smart
Technology has been designed for compliance with
European regulations newly introduced for Electric
Storage Water Heater (ESWH) efficiency and en-
ergy saving. The thermostat has a wide range of
configurations to provide the maximum flexibility
with the OSO Sole 109 blending valve. The 80322/3
configuration maximizes efficiency improvement
and provides all mandatory smart control features.
R
E
S
E
T
R
E
S
E
T
M2
1
2
3
4
THERM-O-DISC
40°C70°C
60°C 50°C
1
2
COTHERM
iQuaFlex
A
T60
220-240V~ 14A
B
V
D E
S
L
L
N
N
Upper
Immersion
Bottom
Immersion
and iQ
smart ther-
mostat
Cable
clamp
Immersion
thermostat
MAX
10 mm
Fork for upper immersion thermostat (ThermODisc)

11
The unit must be connected to a minimum 16 amp
dedicated permanent supply complying with cur-
rent IET Wiring regulations, isolation is required via
a minimum 20 amp double pole isolation switch
with a minimum 3 mm separation required. All
electrical wiring should be carried out by a compe-
tent electrician, using a heat resistant cable (mini-
mum 90°C), and be in accordance with the latest IET
Wiring Regulations.
Conductor length - wire stripping
When connecting electric wires to the iQ thermo-
stat: If multiwire, fine wire or very fine wire conduc-
tors are used, the conductor ends shall be suitably
treated. One suitable treatment for the above point
(OSO Hotwater recommends) is the use of DIN
46228-4 Tubular end-sleeves with plastic sleeves
(commonly known as ferrules with insulation), with
a conductor length of 12 mm as shown in the dia-
gram (right).
Follow the manufacturers instruction for the ap-
propriate assembly of DIN 46228-4 Tubular end-
sleeves with plastic sleeve. Use the appropriate
crimping tool with correct jaw profile & jaw length.
For Solid round single conductors, an insulation
strip length of 12mm ± 1 is suitable with no treat-
ment.
Upper diagram (1) shows wire cutting for solid wire,
lower diagram (2) for multiwire.
Cutting the cable wires to the lengths shown will al-
low the thermostat to be removed without discon-
nection of the Line (L) and Neutral (N) wires.
According to IET Wiring Regulations. Every connec-
tion between conductors or between a conductor
and other equipment shall provide durable electri-
cal continuity and adequate mechanical strength
and protection.
Earth (E) connector specifics: See illustration (right).
!
WARNING
Failure to provide durable electrical continuity
may result in a fire hazard.
Solid wire
Multiwire
Earth connector
Cable
clamp
Power cable
ThermODisc
(upper th. stat)
12 mm
12 mm
See de-
tails left
L N E
10 mm
Max.
10 mm
Max.
8 mm
M5
screw
Treatment
M4
screw
10 mm
10 mm
350
mm
L/N
L/N
L/N
E
1
2

12
Position Label Description Temperature
1Antifrost/vacation Prevent water freezing 6°C
2Smart - Energy saving: Automatically adjust volume of hot water ability based on past consumption From 45°C to 60°C
3Smart Energy saving: Automatically adjust volume of hot water ability based on past consumption From 45°C to 65°C
4Smart + (default) Energy saving: Automatically adjust volume of hot water ability based on past consumption From 50°C to 70°C
5Smart ++ Energy saving: Automatically adjust volume of hot water ability based on past consumption From 55°C to 70°C
6Manual Continous manual temperature setting 60°C
7Manual Continous manual temperature setting 70°C
Program overview
Smart +
Factory preset
Min. 50°C
Max. 70°C
Smart standard
Min. 45°C
Max. 65°C
Smart ++
Min. 55°C
Max. 70°C
Smart -
Min. 45°C
Max. 60°C
Manual
mode
Starting point
60°C
Antifrost
Min. rotating
position
6°C
Power on
LED
Manual
Reset
Manual mode
Max. rotating
position
70°C
COTHERM iQuaFlex
A
T60
220-240V~ 14A
B
V
D E
S
4
3 5
2 6
1
A B
1
Electrical connectors:
Connector Description
A Line connection
B Neutral connection
Earth Connects to grub screw on element head
4.3 Smart Control settings
The rotating knob allows selection of desired
comfort level, factory default setting is Smart +.
Outline of thermostat
when in position
Thermostat probe
pocket
Faston connections
Earth connection
grub screw
Further to the initial installation, end-users or install-
ers may select a different position if the factory pre-
set position doesn’t meet hot water expectations.
The factory default position, designated by a small ar-
row on the top cover, is the recommended position
for usage after water heater installation. This position
is the setting applied to determine the energy label in
conformance with ecolabelling European directive.

13
4.4 Smart Technology
Smart Control for water heaters will save en-
ergy and money for consumers by adapting
the energy used to the typical household re-
quirements for water heating. When the water
heater is first switched on, the smart control
operates like a normal thermostat for 7 days,
but during this time, will monitor and learn the
habits of the household. After 7 days the smart
control will reduce the energy used by the wa-
ter heater to match the requirements of the
household. The smart system stays in learning
mode and will alter the energy usage in a ac-
cordance with changes in household hot water
usage. 80322/3 includes embedded software
with a high performance algorithm which has
been tested and approved in both laboratories
and in field conditions.The algorithm has been
also tested as per the procedure defined in
prEN50440. 80322/3
Thermostat software implements a self setting
algorithm which is performed at first power
ON and repeated throughout the product life
whenever there is a need for product perfor-
mances optimization. This automatic setting
determines a set of parameters in direct rela-
tionship with the power of the heating element
and the tank capacity.
The Smart Themostat is designed to be directly
plugged into an immersion heating element
and includes:
• Mechanical double pole disk safety
• Safety limiter set between 65°C and 90°C
depending on ESWH
• Manual reset safety
• LED indicator : Power, Error, Warm-up
• 2 pins connector for remote LED (not used)
• Rotating knob for product setting
• Smart Sensor
• Horizontal or Vertical mounting
• Riveted tamper proof cover
• Screw pillar terminals
• Anti-Legionella function
• 14A / 220V – 240V / 50 Hz / 3000 W max.
4.5 Smart Control red LED indicator
The red LED on the top cover of 80322/3 Ther-
mostat Standalone provides information about
product status as described in the table (right).
Thermostat
probe sensor
Heating ele-
ment faston
plugs
Safety disk
Rear view
Side view
2 pins connec-
tor for LED
Thermostat
probe sensor
Heating ele-
ment faston
plugs
LED
mode
Description Indication
Off Off full time, or desired
temperature is achieved
Product is in OFF mode
or fully heated
Blinking every
10 sec. OFF for 10s and ON for 1s Product is ready and in normal operation
Solid ON Full time ON In normal operation -
heating up in progress
Fast blinking OFF for 1s and ON for 1s
Fault detected (see
‘Causes of potential
defects
Fast double
blinking at start
2 times, OFF for 0.5s and
ON for 0.5s
Confirmation of factory
preset position of the
rotating knob

14
4.6 Software Reset
A software reset is required after any error
detection. To perform a software reset, switch
the main power supply of the water heater
off, select the vacation antifrost position and
switch the power back on. After a software
reset smart and comfort level can be selected
by rotating the knob. OSO recommends
selection of the Smart factory preset position.
4.7 Anti Legionella cycle
The anti-legionella cycle reduces the risk of
development of bacteria in the water stored
inside the tank. When the water heater is
installed and in operation a process will
permanently monitor the water temperature.
The process is applicable in all modes.
Whenever risk conditions are detected that
might cause the development of bacteria, the
80322/3 thermostat will automatically perform
full water heat cycle above 65°C.
4.8 Smart Controll OFF PEAK function
The 80322/3 thermostat can support smart
function in off-peak installation configuration.
The 80322/3 thermostat will automatically
detect the installation in Off-peak con-
figuration based on presence or absence of
power supply during a day. In smart mode,
the controller will self manage the adaptation
of the algorithm to enable the smart energy
saving. During power-off periods, the red LED
indicator is turned off.
4.9 Smart Control Power Supply
Power supply has been designed to cover
a wide range of voltages and operating
conditions, the 80322/3 thermostat operates
from 195Vac to 275Vac.
A minimum space clearance is requested to
avoid ambient overheat. A minimum of 5 mm
from the top cover and 10 mm from the side of
the product are recommended.
COTHERM iQuaFlex
A
T60
220-240V~ 14A
B
V
D E
S
66 ±2
33 ±2
82
±2
22
±2
25
±2
ø6,5±0,2
11,25±0,2
12,5
±0,2
43
±2
?
±2
39
±2
28 ±0,5

15
4.10 Smart Control - Technical Data
Items Description
Product purpose Energy controller for Electric Storage Water Heater including thermal safety cut-off
Product constructiom Hybrid control including electronic regulation and mechanical safety cut-out: 2-pole bimetal cut-out
Terminal type Power terminals: screw pillar terminal
Method of connection & disconnection Faston connector to Heating Elements
Wiring type Power : Power connection to pillar terminal are suitable for the range of wires as mentioned in Table
10.1.4 of EN 60730-1
Method for mounting
OEM manufacturers of ESWH ensure that this product will have dedicated space in respect with
product size. A clearance of 5mm from top cover and 10 mm from each side of the product are
recommended
Manual reset cut-out Manual reset of safety cut out can be applied after a minimum of 30°C drop in tank temperature
Action Thermostat 1.B ; thermal cut-out 2.B
Extent of sensing elements Smart sensor regulation + 1 disk safety cut-off
Rate impulse voltage 2500V
Light connector Male XH-2 connector
Light connector, max. current Forward voltage 3.2V for 20mA
Maximum power of electric heating
element supported 2.8 kW @ 230V / 3.0 kW @ 240V
Maximum current Amp. 14 A
Max. ambient temperature operation 60°C
Thermostat temperature range 5°C - 70°C
Thermal cut-out 78°C ± 3°C for 120 litre - 85°C ± 3°C for 150 - 300 litre
Heat and fire resistance category D
Horizontal heating elements Yes
Vertical heating elements Yes
Horizontal water heater Yes
Vertical water heater Yes
Lever control No
Smart off peak Yes
Power supply max cut off 20 h
Water heater size 120-300
Switching capacity 65°C - 90°C

16
5. SAFETY AND SERVICING
Maintenance must be carried out by a compe-
tent person.
5.1 Safety cut out
1. The safety cut-out operates if:
a. Wiring is incorrect.
b. The immersion heater thermostat or
cylinder thermostat fails.
2. Remember before resetting the safety cut-
out or altering the thermostat setting, isolate
electrical supply to the unit prior to removal
of the electrical box lid
3. Reduce thermostat setting an press the re-
set button. After adjustments are completed,
ensure the lid to the electrical box is replaced
correctly and the retaining screw is fitted
4. If still out of operation, contact installer.
5.2 Intermittent or slow discharge from tundish
1. Turn off the electrical supply to the immer-
sion heaters.
2. Turn off cold water supply valve.
3. Open a hot tap.
4. Turn the knob on the Temperature and
Pressure Relief Valve (C) to the left and hold
in this position for 30 seconds
5. Check pre-charge on vessel and adjust
pressure if necessary.
6. Open cold water supply valve.
7. When water flows through open tap, close
tap. Turn on electrical supply to the immer-
sion heaters.
5.3 Continous very hot water discharge from
tundish
This indicates a malfunction of a thermal cut-out,
operating thermostat or the combined tempera-
ture and pressure relief valve. Turn off the electri-
cal supply to the immersion heater and also iso-
late an indirect unit from the boiler. Contact the
installer or competent engineer.
5.4 Expansion vessel maintenance
The expansion vessels do not require annual
maintenance and should not be tampered with
unless an intermittent or slow discharge from the
tundish occurs when water is being heated. In this
situation, maintenance must be carried out by a
competent person and the precharge pressure
must be restored to the original value. An annual
visual inspection is recommended.
Important: to check the precharge the expansion
vessel must be completely empty of water. if the
pressure is different from the value shown on the
label it must be restored to the original value.
Do not remove expansion vessel without depres-
surising the cylinder and draining 10 litres of water
from the drain valve at the base of the cylinder
5.5 Guarantee
Cylinder should be serviced annually (as below)
and logbook should be updated in order to vali-
date guarantee. Logbook and service records act
as guarantee document. For terms of guarantee
see Service logbook at rear of manual.
5.6 Service procedure
The following maintenance work has to be carried
out annually by a competent person:
1. Inspection of pressure/temperature relief
valve and expansion relief valve.
2. Manually operate each valve by twisting the
operating cap, and check if water flows un-
obstructed via the tundish to the discharge
point.
3. Ensure that both valves re-seat satisfactorily.
4. Visual inspection of expansion vessel.
5. If the pressure is below 3.0 bar, top up with
suitable air pressure pump to pressure on
vessel label.
6. Complete the service section of Benchmark/
Cylinder Commissioning Checklist included
in the inside back pages of these instructions.
7. Remove , clean and replace line strainer.
8. The immersion heater element must be
removed for inspection on service after 5
years. The threads must be checked for cor-
rosion. If signs of corrosion are evident, the
element must be replaced. Subsequently
the element must be removed and exam-
ined every 3 years. Failure to do so in ar-
eas of aggressive water may result in the
element separating from the cylinder with
consequential escape of water.
9. Visual inspection of valves, external fittings,
immersion heaters and electrical connec-
tions.
5.7 Combination valve
The combination valve can be separated into two
sections by disconnecting the compression fitting
in the middle. The entire valve can be removed by
unscrewing from the top connection. When refit-

17
Valve Outlet size
Minimum size
of discharge
pipe D1
Minimum size of
discharge pipe D2
from tundish
Maximum resistance allowed
expressed as a length of straight
pipe (i.e. no elbown or bends)
Resistance created by each
elbow or bend
G 1/2 15 mm
22 mm
28 mm
35 mm
up to 9 m
up to 18 m
up to 27 m
0.8 m
1.0 m
1.4 m
G 3/4 22 mm
28 mm
35 mm
42 mm
up to 9 m
up to 18 m
up to 27 m
1.0 m
1.4 m
1.7 m
G 1 28 mm
35 mm
42 mm
54 mm
up to 9 m
up to 18 m
up to 27 m
1.4 m
1.7 m
2.3 m
ting, the valve does not tighten, the seal is created
by a double O-ring. To create the seal, the valve
should be wound down until it will not go any fur-
ther, then wound back up less than one full turn
to point in the desired direction.
5.8 Drain cock removal/replacement
To remove drain cock, turn off power supply and
drain cylinder fully. When cylinder has drained,
unscrew rear locking ring behind drain cock (turn
clockwise. Pull drain cock off. Reverse procedure
to refit drain cock.
5.9 Alternative discharge
Discharge pipes must be metal, change to dis-
charge pipes should be suitably temperature
rated as defined by G3 building Regulations.
The pipe must have a continuous fall and should
terminate in a safe and visible place. Downward
discharges at low level, i.e. up to 100 mm above
external surfaces such as car parks, hard stand-
ings, grassed areas etc. are acceptable providing
that where children may play or otherwise come
into contact with discharges, a wire cage or simi-
lar guard is positioned to prevent contact, whilst
maintaining visibility. Discharge at high level, i.e.
into a metal hopper and metal down pipe with the
end of the discharge pipe clearly visible (tundish
visible or not) or onto a roof capable of withstand-
ing high temperature discharges of water and 3
m from any plastics guttering system that would
collect such discharges (tundish visible). Where a
single pipe serves a number of discharges, such
as in blocks of flats, the number served should be
limited to not more than 6 systems so that any
installation discharging can be traced reasonably
easily. The single common discharge pipe should
be at least one pipe size larger than the largest
individual discharge pipe to be connected.
For further information contact your Building
Control Office.

18
6. OSO FAULT FINDING GUIDE
No water from
hot taps
Water from taps
is cold
Intermittent
water discharge
Continous
water discharge
Mains supply off
Strainer blocked
Immersion heaters
not switched on
Cylinder thermal
cutout has
operated
Immersion heater
thermal cutout has
operated
Reduced expansion
vessel charge
Thermal control
failure (note: water
will be hot
Expansion relief
valve not working
properly
Cold water inlet
pressure reducing
valve not working
Temperature and
pressure relief valve
faulty
Check and open stopcock
Turn off water supply, remove and clean strainer
Check and switch on
Check and press reset button
Check and press reset button
Follow instructions 5.2 Intermittent or slow discharge
from tundish
Switch off power to immersion heater(s). When dis-
charge has stopped check thermal controls, replace if
faulty
Check and replace if faulty
Check pressure from valve, if greater
than 3 bar - replace
Drain 10 litres from cylinder and replace valve

19
Description Unit SX 120 iQ SX 150 iQ SX 180 iQ SX 210 iQ SX 250 iQ SX 300 iQ
Part number
- 10802651 10802652 10802653 10802654 10802655 10802656
EAN number
-
7070644005894 7070644005900 7070644005917 7070644005924 7070644005931 7070644005948
Actual capacity of the water tank at 20°C
L. 111 143 164 193 242 281
Outer diameter of the tank
mm 580 580 580 580 580 580
Height of the appliance
mm 870 1050 1160 1300 1550 1750
Gross weight of the appliance
kg 37 42 47 52 59 65
Net weight of appliance once lled with sanitary water
kg 148 185 211 245 301 346
Material of element
- incoloy 825 incoloy 825 incoloy 825 incoloy 825 incoloy 825 incoloy 825
Thermal insulation material
- PUR PUR PUR PUR PUR PUR
Thermal insulation of the tank, average thickness
mm 35 35 35 35 35 35
IP classication
- 21 21 21 21 21 21
Standby heat losses / 24 hour kWh/24h
1.03 1.27 1.42 1.56 1.75 2.04
Standby heat losses
Watts 43 53 59 65 73 85
Thermal energy eciency
% 38.00 38.00 40.00 39.00 39.00 39.00
Annual Electrical Consumption (AEC)
kWh 1336.00 2670.00 2559.00 2641.00 4298.00 4325.00
Load prole
- M L L L XL XL
Hot water capacity(1) >40°C
L. 192 245 279 344 451 490
Primary owrate for Reheat time & Primary heating power
l/h 900 900 900 900 900 900
Heat up (bottom element) 10°C - max (min)
min 130 174 201 235 297 347
Recovery (bottom element) after 70% (min)
- 91 121 141 165 208 243
Heat up (top element) 10°C - max (min)
min N/A 74 101 135 132 132
Recovery (top element) after 70% (min)
- N/A 52 71 95 92 92
ErP class
- C C C C C C
Pressure information
Maximum design pressure of cylinder (rated pressure)
MPa/Bar 1 / 10 1 / 10 1 / 10 1 / 10 1 / 10 1 / 10
Operating pressure of cylinder
MPa/Bar 3 3 3 3 3 3
Max. operating temperature of cylinder
°C 70 70 70 70 70 70
Expansion solution
-GWS 3.5bar GWS 3.5bar GWS 3.5bar GWS 3.5bar GWS 3.5bar Aquasys-
tem 3 bar
Expansion vessel capacity
L. 62 x 6 2 x 6 2 x 6 2 x 6 24
Hydraulic connections
Secondary return
mm 15 15 15 15 15 15
Cold water
Inch 3/4” 3/4” 3/4” 3/4” 3/4” 3/4”
Hot water
Inch 3/4” 3/4” 3/4” 3/4” 3/4” 3/4”
Immersion heater
Inch 5/4” 5/4” 5/4” 5/4” 5/4” 5/4”
Safety valve (factory tted)
Inch 1/2” 1/2” 1/2” 1/2” 1/2” 1/2”
T&P valve (factory tted)
Inch 1/2” 1/2” 1/2” 1/2” 1/2” 1/2”
Pressure reducing valve
Inch 3/4” 3/4” 3/4” 3/4” 3/4” 3/4”
Electrical characteristics
Supply voltage and frequency
WHz
220-240 VAC 220-240 VAC 220-240 VAC 220-240 VAC 220-240 VAC 220-240 VAC
Power of the electrical resistance
kW
3.0kW@240V
2.8kW@230V
3.0kW@240V
2.8kW@230V
3.0kW@240V
2.8kW@230V
3.0kW@240V
2.8kW@230V
3.0kW@240V
2.8kW@230V
3.0kW@240V
2.8kW@230V
Electrical installation
- IEEE regs IEEE regs IEEE regs IEEE regs IEEE regs IEEE regs
Thermostat type - upper junction box
-
Surface Surface Surface Surface Surface Surface
Thermostat type - lower junction box
-
Probe Probe Probe Probe Probe Probe
Immersian Heater - Phase
Phase single single single single single single
Immersion thermostat - temp range Top
°C N/A 40-70 40-70 40-70 40-70 40-70
Immersion thermostat - set temp Top
°C N/A 70 70 70 70 70
Immersion thermostat - temp range Smart
°C 5-70 5-70 5-70 5-70 5-70 5-70
Immersion thermostat - set temp Smart
°C Smart+ Smart+ Smart+ Smart+ Smart+ Smart+
Safety
Safety valve opening pressure +/- 5%
Bar 8 8 8 8 8 8
T&P valve opening pressure/Temp.
Bar/°C 10/90 10/90 10/90 10/90 10/90 10/90
Safety thermostat cutout - Top
°C N/A 85 85 85 85 85
Safety thermostat cutout - Smart
°C 78 85 85 85 85 85
Technical data - SX iQ
7. TECHNICAL AND PERFORMANCE SPECIFICATIONS

20
The code of practice for the installation,
commissioning & servicing of mains pressure hot water storage
Installation,Commissioning
and Service Record Log Book
CUSTOMER DETAILS
NAME
ADDRESS
TEL No.
IMPORTANT
1. Please, keep the Log Book in a safe place for future reference.
2. This Log Book is to be completed in full by the competent person(s) who
commissioned the equipment and then handed to the customer. When this is done,
the Log Book is a commissioning certicate that can be accepted as evidence of
compliance with the appropriate Building Regulations.
3. Failure to install and commission this appliance to the manufacturer’s
instructions may invalidate the guarantee.
The above does not a󰀨ect your statutory rights.
For full details on the HWA charter please visit http://www.hotwater.org.uk/
© HEATING AND HOTWATER INFORMATION COUNCIL
IT IS THE RESPONSIBILITY OF THE INSTALLER TO COMPLETE THIS
LOG BOOK AND PASS IT ON TO THE CUSTOMER. FAILURE TO DO
SO MAY INVALIDATE THE CYLINDER GUARANTEE
HWA charter members agree to:
• To supply t for purpose products clearly and honestly described
• To supply products that meet, or exceed appropriate standards and building and water regulations
• To provide pre and post sales technical support
• To provide clear and concise warranty details to customers