OSO SOLARCYL User manual

SOLARCYL
IM/SC2
Installation details
The OSO unvented unit is designed for use with supply pressure up to 16 bar. For pressures over
16 bar an additional pressure reducing valve must be fitted in the supply pipe to the unit.
Components supplied with the unit for site fitting
(See also page 2 for component list)
*Multibloc valve, includes pressure reducing valve, line strainer, balanced cold water take off,
(for shower or bidet only) check and expansion valve.
*Tundish
*1/2''F x 15 x 15 tee piece.
*Flexible hose.
*3/4'' x 22mm Elbow / Drain Cock.
*Commissioning valve, 1/2'' BSP male.
*Motorised valve.
*2 x 1/2'' BSP male solar sensor pockets.
Components factory fitted
*Immersion heater.
*Thermostats / thermal cut-out.
*Temperature and pressure relief valve.
This manual gives detailed advice for installation and should be read carefully
prior to fitting any unvented unit.
This OSO cylinder must be installed by a competent person and be installed in
compliance with the OSO Installation and Maintenance Instructions, all current
legislation, codes of practice and regulations governing the installation of
unvented hot water cylinders in force at the date of installation.
-1-
PLEASE LEAVE THIS MANUAL WITH THE OSO UNIT AFTER INSTALLATION
INSTALLATION MANUAL
CAPACITY LITRES
HEIGHT
DIAMETER
WEIGHT EMPTY
MAX WEIGHT FULL
COIL RATING KW
UPPER COIL
LOWER COIL
210
1400
580
60
261
12
12
1600
580
64
303
12
26
2090
580
82
397
18
26
250 330
DIMENSION AND WEIGHTS TABLE 1
Health and Safety
Manual Handling Operations Regulations 1992 defines
manual handling as: “any transporting or supporting of
a load (including the lifting, putting down, pushing,
pulling, carrying or moving thereof) by hand or bodily
force”. The Regulations set no specific requirements
such as weight limits. However common sense still has
to be used based on an ergonomic approach for each
individual.

210
250
330
955 mm
1195 mm
1670 mm
TABLE 2
Series Length of tube (o22) mm
1
1A
2
2A
3
4
5
6
7
7A
7B
7C
8
9
Return 3/4’’ BSP Boiler
Return 3/4’’ BSP Solar
Flow 3/4’’ BSP Boiler
Flow 3/4’’ BSP Solar
Pressure Reducing Valve
Includes Item 4
Expansion Valve
Temperature and Pressure
Relief Valve
Tundish
Immersion Heater
Immersion Heater Thermostat
Thermostat Boiler
Thermostat Solar
Cold Feed Tube
(Not Supplied See Table 2)
Hot Water Outlet 22mm
510511
510505
550853
219002
71260
80020
80030
80030
10
11
12
13
14
15
16
17
18
19
20
Flexible Hose
Secondary / Return 1/2” BSPF
Fit 1/2'' F x 1/2'' M x 15mm Tee piece
(Not supplied)
Commissioning Valve / Fitting
(1/2'' MI Drain Cock)
Elbow / Drain Cock
Cable Entry
Electrical Box
Tee Piece
Discharge Pipe (Not supplied)
Motorised Valve (Not Factory Fitted)
Solar sensor bosses
Dip Pipe (removeable)
202108
250440
250445
250006
92000
KEY
SOLAR INDIRECT
Twin Coil Single Immersion Heater
SOLAR DIRECT
Single Coil Twin Immersion Heater
CUTAWAY
Part No KEY Part No
9
19
14
1
15
11,12
18
2
2A
14
19
7A
7
1A
3
4
10
5
16
6
17
7B
7C
8
15
13
9
19
14
15
11,12
7
2A
14
19
7A
7
1A
3
4
10
5
16
6
17
7A
7C
8
15
13
-2-
General Layout Fig: 1
20

-3-
1. To obtain the best performance from your OSO unvented system it is advisable to feed the unit
with an uninterrupted supply.
2. Locate the water heater in a suitable position to facilitate the installation of the cold water supply,
discharge fittings and pipework. Also take into account access to the immersion heaters and the
commissioning valve.
3. Fit the combined male elbow drain cock to cold supply point (13), so that the compression fitting
is vertical.
4. Fit the commissioning valve (12) to the commissioning fitting.
5. Fit both 1/2'' male solar sensor pockets to the Solar Sensor bosses (19).
6. Fit the female outlet of the tee piece to the temperature and pressure relief valve (5) with the
horizontal connection facing right at approx. 45°.
7. Fit the tundish (6) to the tee piece using a short length of 15mm copper tube.
8. Fit the length of copper tube 22mm specified in Table 2 to the cold feed elbow (see 3 above).
9. Fit the pressure reducing valve (3) to the top of the copper tube (see 7 above), so that the black
knob is facing right.
10. Connect the flexible hose to the 1/2’’ outlet of the expansion valve (4) and the horizontal outlet
of the tee piece (see 5 above). Discard compression nut & ring.
11. If a balanced mains pressure cold water supply is required to a shower or bidet (over rim type
only), remove the blanking cap from the pressure reducing valve (3) and connect to the shower
or bidet cold supply. Using the balanced cold connection to feed bath taps can reduce the flow
available to the unvented cylinder. (Major shower manufacturers advise fitting a mini expansion
vessel in the pipework to accommodate thermal expansion and prevent tightening of shower
controls)
12. Before connecting the multibloc, flush the cold supply pipework of all flux and debris.
13. Connect the multibloc to the pressure reduction valve (Multibloc) (3).
Hot water supply
14. Connect the hot water supply pipe to the outlet (9). Ensure connection is water tight.
Secondary return
15. A secondary return facility is provided on all units. Fit a 1/2’’F x 1/2’’M x 15mm Tee piece between
the commissioning valve (12) and the commissioning fitting. See also figure 4 on page 16.
Discharge pipe
16. Connect the discharge pipe from the tundish (6). This must have a continuous fall and be fitted
in accordance with The Building Regulations (see page 6 and 16).
Boiler Primaries
Primary flow & return and motorised valve
17. The boiler primary flow and return connections should be made to the upper coil connections
unit. The motorised valve must be fitted into the primary flow. The primary flow and return fittings
are 3/4’’ BSP female. The valve has 22mm x copper connections.
18. For electrical connection of the motorised valve and immersion heater, please read Electrical
Installation Instructions. (Pages 7 - 11)
Solar Primaries
19. The Solar flow and return connections should be made to the lower coil connections.
Temperature control from the Solar circuit is achieved using a differential solar controller. This
controller must be wired in series through the thermal cut-out on the OSO thermostat (see figure
4 pages 9 & 11).
If Solar Panels are to be installed at a later date then connect the boiler primaries to the lower
coil.
COLD WATER SUPPLY

20. If the solar primary circuit contains a mechanical shut-off device, ensure that a non return valve
in the circuit prevents thermal syphoning if the circulation is stopped. Should a mechanical shut-
off device not be present, one should be fitted and wired in series to the thermal cut-out. Care
should be taken to ensure the device is suitable for temperatures and fluids that may be present
in a solar-thermal system.
21. Temperature sensors for the cylinder provided with the differential controller should be inserted
into the pockets provided (see pt 5 above).
Filling up
1. Close all hot water taps.
2. Open the commissioning valve (12).
3. Open the cold water supply valve.
4. When water flows from the commissioning valve (12), close the valve.
5. Allow system to stabilise for five minutes.
6. Open each hot water tap in turn to expel air from the system pipe work.
7. Check for leaks.
8. Manually operate Temperature and Pressure Relief Valve (5) to ensure free water flow through
discharge pipe. (Turn knob to left.)
Draining
Switch the electrical power off (important to avoid damage to element). Isolate boiler from OSO unit.
Turn off the cold water supply valve. Open hot water tap. Open drain (13). The unit will drain.
Safety Cut-out
1. The safety cut-out operates if:
a. Wiring is incorrect.
b. The immersion heater thermostat or cylinder thermostat fails.
c. Thermostat is set too high.
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 and press the reset 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.
Cold or tepid water discharge from tundish
1. Turn off the electrical supply to the immersion heaters.
2. Turn off cold water supply valve.
3. Open a hot tap.
4. Drain water from commissioning valve (12) until water flow stops.
5. Turn the knob on the Temperature and Pressure Relief Valve (5) to the left and hold in this
position until water flow stops from the commissioning valve.
6. Close commissioning valve.
7. Close all hot taps.
8. Open cold water supply valve.
9. Turn on electrical supply to the immersion heaters.
The process described above recommissions the expansion air gap in the cylinder.
COMMISSIONING
SAFETY AND MAINTENANCE
RECOMMISSIONING INSTRUCTIONS
-4-

Hot water discharge from tundish
This indicates a malfunction of a thermal cut-out, operating thermostat or the combined temperature
and pressure relief valve. Turn off the electrical supply to the immersion heater and also isolate an
indirect unit from the boiler. Contact the installer or competent engineer.
Cold water inlet control (Multibloc) See Page 2 Items 3 - 4
This combination consists of a pressure reducing valve with integral strainer, check valve and
expansion valve with stainless steel seat. The pressure settings are set and locked in the factory and
are shown on the top of each valve. For optimum performance the following installation instructions
should be complied with.
Installation
1. Cold water supply to be 22mm nominal size.
2. Flush supply pipework before connection to remove all flux and debris prior to fitting the inlet
controls. Failure to do this may result in irreparable damage to the controls and will invalidate
the warranty.
3. The “MULTIBLOC” can be fitted in any orientation to suit the installation as long as it is fitted in
the correct flow direction. Check the flow arrows on the side of the body.
4. The expansion valve should be either horizontal or upright - if fitted inverted, debris may be
deposited on the seat and cause fouling of the seat when the valve operates. Check direction
of flow arrows.
5. The black plastic plugs in the body are pressure gauge connections to enable pressure
monitoring to be carried out, should the system develop a fault. It is recommended that these
be accessible (the pressure reducing valve has two - only one need be accessible).
6. Expansion relief drain pipework must be connected to a safe visible discharge point via a
tundish and the pipework must have a continuous fall.
7. The pressure reducing valve has two outlets, the second one is for a balanced cold water
supply, to a shower or a bidet (over rim type only, ascending spray type requires type AA, AB or
AD air gap). (Major shower manufacturers advise fitting a mini expansion vessel in the balanced
cold supply to accommodate thermal expansion and prevent tightening of shower controls).
Using the balanced cold connection to feed bath taps can reduce the flow available to the
unvented cylinder. If not required the balanced cold supply is blanked off.
The Benchmark Log Book enclosed with the cylinder should be completed after commissioning
of the system and handed to the customer for future use.
8. If an expansion vessel is to be fitted it must be connected to the cold feed pipe between the
pressure reduction valve, (Multibloc) (3) and the cylinder.
NOTE: If the unit has been commissioned and is to be unused for more than 8 weeks it is
advisable to turn off the cold supply and draw off approximately 5 litres of water through a hot
tap. NB The cold supply must be opened prior to use.
INSTALLATION AND SERVICING INSTRUCTIONS
-5-

MAINTENANCE
-6-
It is recommended that annually a competent person
(a) Inspects and cleans the line strainer.
(b) Checks the operation of the expansion relief valve and temperature & pressure relief valve.
(c) Recommissions the cylinder in accordance with the instructions on page 4.
Tundish
Install theTundish in a vertical position within a maximum of 500mm from the temperature and
Pressure Relief Valve drain connection. Ensure the expansion relief pipework discharges through the
tundish. Tundish pipework must be 22mm with a minimum vertical length of 300mm below tundish.
Maximum permitted length of 22mm pipework is 9m. Each bend or elbow is equivalent to 0.8m of
pipework.
All pipework must have continuous fall and discharge in a safe, visible position. If any doubt, refer to
Building Regulation G3.
Pressure reducing valve
1. Isolate the cold water supply.
2. Unscrew the retaining nut of the valve.
The complete operating mechanism,
including the strainer can be removed.
3. Clean the filter mesh and the cartridge
under running water.
4. Replace cartridge ensuring that strainer is
correctly located and reassemble the unit.
Pressure Reducing Valve cartridge and
strainer Part No. 100 510 2.1 Bar.
Expansion relief cartridge
1. Isolate the cold water supply.
2. Unscrew blue expansion relief headwork
from valve body.
3. Clean valve seat face and seating - do not
scratch or damage either seat face or
seating.
4. Refit in reverse order. Do not overtighten
Expansion valve cartridge and seat Part
No. 214009 8.0 Bar. Complete Expansion
Valve Part No. 510 505 8.0 Bar.
Spare Parts
Pressure reducing valve
Cartridge and strainer 2.1 bar
Part No. 510501 (green dial)
Part No. 100510 (blue dial)

Immersion heaters
All units are fitted with one immersion heater which is located behind the lower electrical box.
Wiring instructions for the immersion heater is located on the reverse side of the lower lid. Follow the
wiring instructions connecting the live, neutral and earth as indicated. The electrical connection to the
immersion heater must conform to current IEE wiring regulations. The unit must be permanently
connected to the electrical supply through a double-pole linked switch with a minimum break capacity
of 13 amps. All internal wiring is factory mounted. Each immersion heater has a working thermostat
adjustable between 40°C - 70°C. A safety cut-out is also incorporated within the thermostat and will
operate at 85°C ± 3°C. Should this happen, 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 replaced correctly and the
retaining screw is fitted.
Indirect Units upper coil
Motorised valve
To comply with regulations governing the installation of indirect unvented cylinders, a motorised valve
must be fitted in the primary flow. Your OSO unit has been supplied with a two port motorised valve,
which will act as a positive energy cut-out should the safety cut-out operate. The motorised valve will
also control the temperature of the domestic stored water via the cylinder thermostat, which is located
in the upper electrical box. The unit should be installed on an “S” or “Y” plan system. Cylinder
temperature control can also be achieved via the solar thermostat when the boiler is not operational.
Please follow the instructions carefully. All electrical connections must conform to current IEE wiring
regulations. The working thermostat is adjustable between 40°C - 70°C. A safety cut-out is also
incorporated within the thermostat and will operate at 85°C ± 3°C. Should the safety cut-out be brought
into operation, the motorised valve will operate and close down the primary flow to the cylinder. To
reset the safety cut-out and the motorised valve the reset button must be pressed in (see fig.4 page 9).
Lower (Solar) coil
Heat sources to unvented hot water cylinders must be controlled by a thermal cut-out as well as a
thermostat. The Oso Solarcyl is supplied both with bosses for solar sensor pockets and the pockets
themselves.
The top half of the thermostats fitted to the cylinder is a thermal cut-out. The solar controller (not
supplied) and solar sensor point should be wired through the Oso thermal cut-out.
Please note that the direction of flow in the solar coil is reversed compared to the boiler coil. If the
cylinder is not being used for solar use, follow the directions for the upper coil.
OSO Hotwater (UK) Limited can not be responsible if alternative wiring plans are used.
Important: Before resetting the safety cut-out or altering the thermostat setting isolate electrical supply
to the unit before removal of the lid.
ELECTRICAL INSTALLATION
-7-

S Plan Wiring Layout
UPPER ELECTRICAL BOX
For Other Boilers Refer To Boiler Manufacturer
-8-
The wiring plan shown is based on the use of a 10-way Junction Box
(Honeywell Part no. 42002116-001)
Junction Box terminal 10 is switched live and, if needed, terminal 9 is pump live.

S Plan System Schematic
L
N
4
3
1
2
4
6
L
N
4
3
1
2
4
6
1
2
3
4
2
5
L
N
E
1
2
3
Br
Bl
Gr
Or
5
2
1
1 0
3
Br
Bl
Gr
Or
9
2
1
1 0
3
1
2
3
4
5
6
7
8
9
10
-9-
Honeywell
ST 6400
Programmer 7 day
Honeywell
ST 6300
Programmer 24 Hr
ST 6360
Room stat
Mains
HTG Valve
V4043H
DHW Valve
V4043H
Immersion Heater
Immersion Heater Thermostat
Coil Thermostats
71255
80020
80030
Electrical spare parts:
Pump
Collector
Sensor
Cylinder
Sensor
Solar Controller
WIRING
SCHEMATIC - LOWER ELECTRICAL BOX
Thermostat
Sensor
Pocket
Thermostat
Pocket
Sensor
Collector
FIGURE 1 FIGURE 2
FIGURE 3
FIGURE 4

For Other Boilers Refer To Boiler Manufacturer
Y Plan Wiring Layout
-10-
UPPER ELECTRICAL BOX
The wiring plan shown is based on the use of a 10-way Junction Box
(Honeywell Part no. 42002116-001)
Junction Box terminal 8 is switched live and, if needed, terminal 10 is pump live.

Mid position Valve (not supplied)
L
N
4
1
3
1
2
4
7
6
Honeywell
ST 6400
Programmer 7 day
L
N
4
1
3
1
2
4
7
6
Honeywell
ST 6300
Programmer 24Hr
1
2
3
4
2
5
L
N
E
1
2
3
W
G
O
Bl
5
7
8
2
3
Br
Bl
Gr
Or
9
2
1
8
3
ST 6360
Room stat
Mains
V4073A1039
DHW Valve
V4043H
1
2
3
4
5
6
7
8
9
10
Y Plan System Schematic
-11-
Immersion Heater
Immersion Heater Thermostat
Coil Thermostats
71255
80020
80030
Electrical spare parts:
Pump
Collector
Sensor
Cylinder
Sensor
Solar Controller
WIRING
SCHEMATIC - LOWER ELECTRICAL BOX
Thermostat
Sensor
Pocket
Sensor
Pocket
Sensor
Collector
FIGURE 1 FIGURE 2
FIGURE 3
FIGURE 4

OSO FAULT FINDING GUIDE
-12-
FAULT
NOTE: Disconnect electrical supply before removing any electrical equipment covers
POSSIBLE CAUSE REMEDY
No water flow from hot taps 1. Mains supply off.
2. Strainer blocked.
3. Cold water inlet Pressure
Reducing Valve incorrectly fitted.
1. Check and open stopcock
2. Turn off water supply. Remove
strainer and clean. (See
Pressure Reducing Valve page
6 Installation Manual)
3. Check and refit as required,
(see item 3 page 5 of installation
manual).
Water from hot taps is cold. 1. Low solar gain.
2. Immersion heaters not switched
on.
3. Immersion heater thermal cut-
out has operated.
4. Programmer set to central
heating or not switched on.
5. Boiler not working.
6. Cylinder thermal cut-out has
operated. (Indirect units only).
7. Motorised valve not operating
correctly.
1. Activate alternative power source.
2. Check and switch on.
3. Check and reset button. (See
thermostat diagram page 9 and
safety cut-out on page 4 of
installation manual).
4. Check and set to hot water.
5. Check boiler operation. If fault
suspected consult installer or
boiler manufacturer.
6. As at No. 2.
7. Check wiring and / or plumbing
connections to motorised valve.
(See pages 8 or 10 of the
installation manual).
Intermittent water discharge. 1. Reduced internal expansion.
2. Thermal control failure.
(Note Water will be hot).
1. Recharge “air gap” (See cold
water discharge on page 4 of
installation manual).
2. Switch off power to immersion
heater(s) and boiler supply to
the unit. When discharge has
stopped, check thermal controls,
replace it faulty. Contact a
competent person.
Continuous water discharge. 1. Cold water inlet Pressure
Reducing Valve not working.
2. Temperature and pressure relief
valve faulty.
3. Expansion relief valve not
working correctly.
1. Check pressure from valve if
greater than 2.1 bar replace.
(See page 6 of installation
manual).
2. As No. 2 of above.
3. Check and replace if faulty.
(See page 6 of installation
manual).

OSO FAULT FINDING GUIDE
Intermittent water discharge
Reduced Internal
expansion volume
Thermal control
failure
Recharge “air gap”.
Follow correct
procedure
Switch off power to
immersion heaters and
boiler supply to the unit.
When discharge has
stopped check thermal
controls and replace as
necessary
If problem still persists
contact a competent
engineer / plumber
No water flow from hot taps
If problem still persists
contact a competent
engineer
Mains supply off Line strainer
blocked
Cold water PRV
incorrectly fitted
Open supply
valve
Clear line
strainer
Check and refit
as required
YES YES
NO NO
YESYESYES
-13-

-14-
OSO FAULT FINDING GUIDE
Hot water from taps is cold
Excessive Hot water from taps
If in doubt at any stage you must consult a qualified electrician
If problem still persists
contact a competent
engineer / plumber
Insufficient hot water
when boiler is used
Remove hot water dip pipe and
fit seperate expansion vessel.
(see page 15)
Is the
programmer set to
central heating or
not switched on?
Check and
set to hot
water
programme.
Is the
motorised
valve
operating
correctly?
Check wiring
or plumbing
connections
Check and
reset
button
Has
cylinder
thermal
cut-out
operated?
Is the boiler
working?
NO
NO
YES YES
YES YES
NO
Thermostat/Solar
controller set too high
Reduce
Temperature setting
Faulty
Thermostat
replace
Is Thermostat wired
as per layouts for
“S” or “Y” plan
installation
Is 2-port motorised
valve closing when
cylinder reaches
temperature?
Connect wiring as
per instructions
Check cylinder
Thermostat is switching
on & off with
programmer & hot water
on
Wiring Fault
Seek advice
from
electrician
Check wiring
on cylinder
Thermostat
NO
YES
NO
YES
NO
YES
NO
YES
Activate boiler
Low solar gain

-15-
INCREASED VOLUMES AND HIGH PRESSURE OPERATION
1. The capacity of all OSO cylinders can be increased by approximately 20% if the internal hotwater
dip pipe supply connection (see page 2 part no 20) is removed by unscrewing the hot supply
connection. On a Solarcyl, the increased capacity can also make a significant difference to the
amount of hot water available from the upper heating coil to accommodate the expansion of
secondary water, an expansion vessel suitable for potable water must be connected to the cold
feed pipe between the pressure reducing valve and the cold entry to the cylinder (See fig 3
below).
2. Increased pressures can be obtained by fitting an adjustable pressure reducing cartridge (part
no: 100511) in the pressure reducing valve. This cartridge is adjustable between 0.5 and 5 bar.
It is advisable to remove the hot supply connection and fit a suitable expansion vessel (see 1
above) (see Fig 3).
3. Table 3 gives details of cylinder and expansion vessel capacities for a range of pressure settings.
4. The expansion vessel must be suitable for potable water and charged to the same pressure as
the pressure reducing valve.
5. If the cylinder is to be used in this manner ignore the filling procedure on page 4. Leave one hot
tap open. Open the cold water supply valve. When water appears at the open hot tap close the
tap. Open each hot tap in turn to expel air. Manually operate the pressure and temperature relief
valve (5) to ensure free water flow through discharge pipe. (Turn knob to left.)
Table 3
Standard
Capacity 100 125 170 210 250 330
120 150 200 250 300 380
8 1212181824
8 1212181824
8 1212181824
12 18 19 24 30 40
12 18 19 24 30 40
Without DIP Pipe
PRV
Bar
2
2.5
3
4
5
8
8
8
8
8
Expansion
Relief Bar Expansion Vessel Volume (Litres)
SUGGESTED CONNECTION POSITION
FOR EXPANSION VESSEL
Figure 3
Expansion Vessel Sized
to System Volume. Connection is
between inlet control group and drain
elbow to cylinder. Pressure should be
set to that of the Pressure reducing
Valve. Expansion vessel can be floor
or wall mounted.
Drain Elbow
Inlet Control Group

-16-
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 or
The British Board of Agrément.
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 withstanding high temperature discharges
of water and 3m from any plastics guttering system
that would collect such discharges (tundish visible).
ALTERNATIVE DISCHARGE
SECONDARY RETURN
Downward discharges at low level, i.e. up to 100mm above external surfaces such as car parks, hard
standings, grassed areas etc, are acceptable providing that where children may play or otherwise
come into contact with discharges, a wire cage or similar guard is positioned to prevent contact, whilst
maintaining visibility.
5
6
43
2
1
HOT TAPS
HOT OUTLET COLD INLET
FIGURE 4
1 Secondary Return Fitting use 1/2''F x 1/2'' M x 15mm
2 Commissioning Valve
3 Non Return Valve
4 Circulation Pump
5 Secondary Return Line
6 Balanced cold supply for showers or bidet only
OSO HOTWATER (UK) LTD www.oso-hotwater.com
E15 Marquis Court
Team Valley Trading Estate
Gateshead
Tyne & Wear, NE11 0RU E-mail [e-mail]
Phone: [phone] E-mail [e-mail]
Fax: [phone] E-mail [e-mail]
All replacement parts must be supplied by OSO HOTWATER (UK) LIMITED.
To obtain the address of a local stockist contact:
ISSUE 6 - OS29 10/06