VOKERA AquaFlow Release note

Supplied By www.heating spares.co Tel. [phone]
Installation
& Servicing
Instructions
THESE INSTRUCTIONS
TO BE RETAINED
BY USER
Vokèra is a licensed member of the Benchmark scheme
which aims to improve the standards of installation and
commissioning of domestic hot water systems in the UK.
AquaFlow Single coil water cylinder
AquaFlow Twin Twin coil water cylinder

Supplied By www.heating spares.co Tel. [phone]
-1-
PLEASE LEAVE THIS MANUAL WITH THE UNIT AFTER INSTALLATION
00142046
-
00
INSTALLATION MANUAL
This manual gives detailed advice for installation and should be read carefully
prior to fitting any unvented unit. This Vokera Aquaflow cylinder must be installed
by a competent person and be installed in compliance with the Vokera Aquaflow
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.
Components supplied with the unit for site fitting
(See also page 2/3 for component list)
*Multiblocvalve,includes pressure reducing valve, line strainer, balanced cold water take off, (for
shower or bidet only) check and expansion valve.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
DIMENSION AND WEIGHTS TABLE 1
PRODUCTREF. 150 200 250 210T250T
HEIGHT 900 1150 1600 1400 1600
DIAMETER 580 580 580 580 580
WEIGHT EMPTY 40 48 64 60 64
COIL RATING KW 12 26 26
UPPER COIL 12 12
LOWER COIL 12 26
* Tundish.
*1/2"F x 15 x 15 tee piece.
* Flexible hose.
* 3/4" x 22 mm Elbow / Drain Cock
*Commissioningvalve, 1/2" BSP male.
* Motorized valve.
* Expansion vessel
Components factory fitted
* Immersion heater(s).
* Thermostats / thermal cut-out.
* Temperature and pressure relief valve.
Installation details
The Vokera 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. Wall
mounting brackets are available for Vokera Aquaflow unvented units 120-200 litres capacity.
Aquaflow 150 - 200 - 250
AquaFlow Twin 210 - 250

Supplied By www.heating spares.co Tel. [phone]
General Layout Fig: 1
KEY Part No KEY Part No
1 Flow ¾" BSPF 10 Flexible Hose 202108
2 Return ¾" BSPF 11 Secondary Return ½”BSPF
Fit ½"Fx½"Mx15mm Tee piece (Not
supplied)
3 Pressure Reducing Valve
Includes Item 4 510503 12 Commisioning Valve / Fitting (½" MI Drain Cock) 250440
4 Check and Expansion Valve 510505 13 Elbow / Drain Cock 250445
5 Temperature and Pressure
Relief Valve 550803 14 Cable Entry
6 Tundish 219002 15 Electrical Box
7 Immersion Heater 71255 16 Tee Piece 250006
7A Thermostat Immersion Heater
Thermostat Cylinder 80400 80511 17 Discharge Pipe (Not supplied)
8 Cold Feed Tube
(Not Supplied See Table 2) 18 Motorised Valve Not Factory Fitted)
92000
9 Hot Water Outlet 22mm
TABLE 2
Series Length of tube (ø22) mm
120 480 mm
150 585 mm
200 760 mm
INDIRECT
2
2
2
2
RESET
RESET
1
1
1
1
2
2
3
3
1
1
3
3
4
4
1
1
4
4
2
2
RESET
RESET
7
5
9
1
2
2
1
4
15
1
1
8
16
9
13
7a
8
6
17
10
5
4
3
1
1
-2-

Supplied By www.heating spares.co Tel. [phone]
-3-
General Layout Fig: 1A
KEY Part No KEY Part No
1
1A Return ¾" BSP Return ¾" BSP 10 Flexible Hose 202108
2
2A Flow ¾" BSP Flow ¾" BSP 11 Secondary Return ½”BSPF Fit ½"Fx½"Mx15mm Tee piece (Not
supplied)
3 Pressure Reducing Valve
Includes Item 4 510503 12 Commissioning Valve / Fitting (½" MI Drain Cock) 250440
4 Check and Expansion Valve 510505 13 Elbow / Drain Cock 250445
5 Temperature and Pressure
Relief Valve 550803 14 Cable Entry
6 Tundish 219002 15 Electrical Box
7
7A Immersion Heater Immersion Heater Thermostat 71255 80020 16 Tee Piece 250006
7B
7C Thermostat Boiler Thermostat Solar 80030 80030 17 Discharge Pipe (Not supplied)
8 Cold Feed Tube
(Not Supplied See Table 2) 18 Motorised Valve Not Factory Fitted)
92000
9 Hot Water Outlet 22mm 19 Solar Sensor Bosses
20 Dip Pipe (removable)
20

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COLD WATER SUPPLY
1. To obtain the best performance from your Aquaflow 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 ½” 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 15 mm 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 ashower or bidet (over rim
type only, ascending spray type requires type AA,AB or AD air gap), remove the blanking
cap from the pressure reducing valve (3) and connect to the shower or bidet cold supply.
(Major shower manufacturers advise fitting a mini expansion vessel in the balanced cold supply
pipework 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.
12. Before connecting the cold supply, flush the cold supply pipework of all flux and debris.
13. Connect the cold supply 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 ½” F x ½” 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 pages 5 and 12).