Baxi MULTIFIT Evacuated Tube Collector User manual

Evacuated Tube Collector
East West Array
THESE INSTRUCTIONS SHOULD BE READ IN CONJUNCTION WITH THE
Baxi SolarfloTM Installation Guide (Part No. 5130226) and Commissioning Guide (Part No. 5130227).
Please leave these instructions with the
User for Safe Keeping
The User Guide
(Part No. 5130229) covers the
controller functionality of this kit.
External fixing methods for
Pitched Roof,‘A’ Frame or
Facade Floor are covered in the
instructions (Part No. 5130229,
5130330, 5130331)
INSTALLATION & COMMISSIONING
GUIDANCE NOTES

2
Content
1.0 Introduction to Solar 3
2.0 Filling 4
3.0 Commissioning of Hydraulic Station 7
4.0 Pump & Sensor Connections 8
Section Page
The East West Array options are only for use with the existing
collector sets.
If correct system sizing demands that 30 tubes are necessary,
then 20 tubes must be fitted to the west facing roof aspect
and 10 tubes to the east roof aspect.
Where the roof orientation is not ideal ie; 10 degrees west of
south, a performance close to that of such an orientation can
be obtained by placing one solar collector on a opposite roof
aspects (one facing east, the other facing west). In this manner
the suns energy can be utilised throughout the day.The
standard solar kit will assume collector mounting on a single
roof aspect so the additional parts in the new kits will be
necessary to mount the collector panels on a separate roof
aspects and provide a additional pumped primary solar circuit.
The solar controller supplied with the main hydraulic station
(see Installation Guide) already has the facility built in, to
control such a system.
Collectors West Facing
20 Tubes
5130214
(20ETC on roof tile)
Collectors East Facing
10 Tubes
5129980
(East/West kit)
+

3
1.0 Introduction to Solar
Solar Transfer Fluid is not supplied with the East West array kit.
Where additional transfer fluid is required, it is available under
the part no. 5130225 (20 litres) as a accessory. Only this
approved Baxi fluid should be used on system and must not
be used with other types of fluid or diluted. Failure to observe
these requirements will invalidate the product warranty.
Where possible all pipe runs between collectors should be as
short as possible.
For system controller wiring of the east west array, refer to
the back page.
1 Cold Supply for Domestic Hot Water
2 Domestic Hot Water Outlet
3 Auxiliary Discharge Arrangement
4 Solar Collector 1 (West facing)
5 Solar Collector 2 (East facing)
6 Collector Sensor 1 (PT 1000)
7 Collector Sensor 2 (PT 1000)
8 Solar Pumping Station with Controller
9 Solar Pumping Station East Facing Collector
10 Solar Expansion Vessel
11 Auxiliary Heat Source (Central Heating Boiler)
12 Flow Meter on a ‘COMMON’ Return
1
2
3
4
5
6
7
8
9
10
11 12
Blending
Valve
Combi
Valve
System

2.0 Flushing & Filling the System
4
2.1 Filling the East/West pump station
When using the Multifit Electric Filling Pump (Part No 5130234)
or the Multifit Manual Filling Pump (Part No 5122761).
1. Ensure the pump is primed with Solar fluid prior to
commencing filling procedure.
2. Connect the filling pump as shown to the connection on the
safety group of the East / West pump station (Fig. 1 item1).
Electric Filling Pump - Place the suction tube into the transfer
fluid container with the hose approximately 50mm from the
bottom of the container, connect the drain hose to the drain
valve connection on the flow meter (Fig. 1 item 2). Place the
drain tube into the transfer fluid container. Check at this stage
that both valves are closed, the valves are closed when the
isolation levers are in the horizontal plane.
NOTE: Isolate the main pump station when filling the East/West.
3.Turn the combined isolation valve to 45° (Fig. 2 item 4).
4.Turn the flow meter adjusting screw off (Fig. 1a item 6). ‘Off ’ is
when the screw is in the 9 O’clock position.
5. The lever on the pump outlet should be turned to the closed
position (Electric Filling Pump).
6. Switch on the pump (Electric Filling Pump) and pressurise the
pump prior to opening the fill valve. Open fully the east west
pump station fill valve (Fig. 1 item1), and open the drain valve
(Fig. 1 item 2).
7. Electric Filling Pump - Turn the pump outlet lever slowly and
only open the pump outlet sufficiently to ensure the system can
be filled, and that over pressurisation of the circuit does not
occur.
8.The transfer fluid level should be monitored during the fill
procedure. If the fluid level gets near to the bottom of the
suction hose, approximately 1 litre is left in the container, it will be
necessary to stop the fill procedure, close valves 1 and 2 (Fig. 1),
switch off the pump and replenish the transfer fluid before
repeating from step 1 again. (If the level gets below this, the
pump is liable to damage and air will be introduced into the
system.)
9. During the flushing process air bubbles may be seen behind the
glass window of the flow meter, the air should gradually reduce
until there is a clear flow of fluid.The flushing process should be
run for several minutes to ensure the system is flushed of debris
and all air is removed.The debris will be caught within the inline
filter of the drain tube on the multifit electric pump. Debris
accumulation can be cleaned out from the filter when required.
10. Once the east west leg of the system is filled and a pressure
of 2 bar achieved, (Electrical Filling Pump - Close the valves
(Fig. 1 items 1 & 2).Turn the combined isolation valve (Fig. 2 item
4) back from 45°. Switch off the pump, disconnect the pump
hoses carefully releasing the pressure, and screw on the brass
sealing caps securely. Check for leaks.
11.Turn the flow meter adjusting screw back to 12 O’clock to
open, (Fig. 1a item 6). For flow rate adjustment see section 3.0.
Fig. 1
Fig. 1a
6
7
Key - Item Identification
1 Safety Group incorporating Pressure Relief
2 Drain with Isolation Connection Point
3 Non Return Valve Screw
5 Right Hand Isolation Valve with Integral Thermometer
6 Flow Meter Adjustment Screw (shown in open position)
7 Flow Meter
Outlet Lever to restrict
& close flow
Open position
Approx
50mm
3
5
7
6
On Off
1 (Fill Valve)
2 (Drain Valve)

2.0 Flushing & Filling the System
5
2.2 Completing the System fill of the Solar Pump
Station with Controller
1. Connect the filling pump to the solar pump station with
controller, on the fill and drain valve on the safety group (Fig. 2
item1) and connect the drain hose to the fill and drain valve on
the flow meter, (Fig. 2 item 2) and check that the valves are
closed. Ensure the drain hose is installed as prescribed earlier.
2.Turn the left hand isolating valve (Fig. 2, item 4) to 45°
anticlockwise and the flow meter adjusting screw (Fig. 2, item 6)
to off.
3. Fully open the fill and drain valves on the safety group (Fig. 2,
item 1 & 2)
4.Turn the slot of the adjusting screw (Fig. 2, item 3) in the return
so the slot is vertical to open the non return valve
5.The handle on the Multifit Electric Pump outlet should be
turned to the closed position.
6. Switch on the pump, and open the pump outlet lever slowly.
Only open the pump outlet sufficiently to ensure the system can
be filled, and that over pressurisation of the circuit does not
occur.
7. The transfer fluid level should be monitored during the fill
procedure. If the fluid level gets near the bottom of the suction
hose, approximately 1 litre is left in the container, it will be
necessary to stop the fill procedure, close items 1 and 2
(Fig. 2), switch off the pump and replenish the transfer fluid
before repeating from step 1 again. (If the level gets below this,
the pump is liable to damage and air will be introduced into the
system.)
8. During the fill process air bubbles may be seen behind the glass
window of the flow meter (Fig. 2 item 7 ), the air should gradually
reduce until there is a clear flow of fluid.The fill process should be
run for several minutes to ensure the system is flushed of debris
and all air is removed.The debris should be caught within the
inline filter of the drain tube. Debris accumulation can be cleaned
out from the filter at a later date on the Multifit Electric Pump.
9. Continue filling at the fill valve on the safety group (Fig. 2, item
1) until the system pressure reaches 2 bar.
10. Once the master pump station leg of the system is filled and a
pressure of 2 bar achieved, close the drain valve (Fig. 2 item 2),
switch off the pump, close the valves (Fig. 2 items 1 & 2). Check
for leaks.
11.Turn the left hand isolating valve (Fig. 2, item 4) back 45°
clockwise until the dot on the bezel is back at 12 o’clock
12.Turn the non return back to open (Fig. 2, item 3)(12 o’clock).
13.Turn the flow meter adjusting screw (Fig. 2, item 6) until it is
fully open on both pump stations (12 o’clock).
For step by step guide to operating the controller, refer to
commissioning instructions section 3 (Part No. 5130227).
Ensure collectors temperatures are cool before this process.
14.Turn on the power to the solar controller.This should display
the information screen.
15. Key the left button (Fig. 2a item 3) once to enter the main
menu screen.The ‘i’ icon will flash (See section 3.0 of the
commissioning booklet 5130227 for a description of the solar
controller button functions)
Fig. 2
1 (Fill Valve)
2 (Drain Valve)
3
4
5
6
Key - Item Identification
1 Safety Group incorporating Pressure Relief
2 Drain with Isolation Connection Point
3 Non Return Valve Screw
4 Combined Isolation Valve with Integral Thermometer
5 Right Hand Isolation Valve with Integral Thermometer
6 Flow Meter Adjustment Screw
7 Flow Meter
Outlet Lever to restrict
& close flow
Open position
7
45°
In-Line
Filter
On Off
1
2
4
35
Fig. 2a

2.0 Flushing & Filling the System
6
2.2 Completing the System fill of the Solar Pump
Station with Controller (cont)
16. Press the right button (Fig. 2a item 5) twice to select the
manual operation menu ( ). Press the down button and the
‘pump’ symbol and the ‘switch output 1 and 2 symbols should
now be seen with a ‘zero’ displayed. Changing the ‘zero’ to a ‘one’
will operate the pump.To do this, press the right button and the
‘zero’ will flash.
WARNING: During this commissioning stage the safety
temperature control is disabled. Ensure collectors are cool.
17. Each pump unit needs to be set up individually.
18. Press either the up or down button to manually activate pump
1, then key right to accept the setting. See commissioning section
to follow controller settings.
19. Leave the pump running for sufficient time to allow any
residual air to be purged from the system via the air separator
and any bleed points fitted to the system. Use the flow meter
window (Fig. 3, item 7) to as a visible indicator of the air bubbles.
NOTE: During this time the joints may be checked for leaks.
20. Stop the pump using the button procedure described
previously (paragraph 16). If pressure has been lost from the
system during the air bleeding process, the top up procedure
described earlier can be repeated to top up the system.
21. Repeat 18 to 20 for pump 2, and select pump 2.
Check pressure in the solar primary pipework
1. After flushing and filling the solar primary system with heat
transfer fluid the pressure must be checked.
2. Pressure test the system to between 2 to 2.5 bar. Observe the
maximum pressure ratings of all components concerned.
3. Check the solar heating system for leaks.
4. Close the fill and drain valve on the safety group.
Setting the System Pressure
a) During commissioning, the system pressure should be 0.7 bar
above the static pressure (1 metre height differential equals 0.1
bar). However, it must be at least 1.5 bar and no higher than 2.2
bar.
b) Determine the system pressure when the system is cold
(20°C).This should be recorded on the Commissioning Record
Sheet (page 21) of the Commissioning Booklet
Part No. 5130227.
c) If the pressure is too low you should pump additional heat
transfer fluid into the system; the fill & drain valve on the safety
group (Fig. 4 Item 1) needs to be opened for this purpose. When
system pressure is correctly set, ensure the fill and drain valve is
closed and remove filling hose from safety group.
d) Remove all tubing from the fill and drain valve on the safety
group (Fig 3, item 1) and the drain valve on the flow meter. (Fig 3,
item 2) and replace both the sealing caps securely, ensuring that
the rubber seals are fitted. Check for leaks.
1
3
5
2
7
6
Fig. 3
Fig. 4
1
2
Key - Item Identification
1 Safety Group incorporating Pressure Relief
2 Drain with Isolation Connection Point
3 Non Return Valve Screw
4 Combined Isolation Valve with Integral Thermometer
5 Right Hand Isolation Valve with Integral Thermometer
6 Flow Meter Adjustment Screw
7 Flow Meter
4

7
3.1 Checking and adjusting the flow rate East / West
1. Adjust the flow rate when the system is cold (20°C)
(see Fig. 5).
2.The flow rate should be adjusted to give the optimum flow.
3. Manually operate the solar pump (see section 2.2 paragraph
16).
Warning: The temperature control is disabled during this
procedure.
4. Set the solar pump speed selector so that the required flow
rate is achieved or exceeded with the lowest possible setting.
The flow limiter adjusting screw (Fig. 5) can be used to fine-
tune the flow rate.
5. Set the required flow rate of 2 litres for the 10 tube (East
facing).
6.The float in the flow meter will indicate the circulation flow
rate through the flow meter sight glass (Fig. 5 Item 7).
7. Adjust screw of the flow limiter with a screwdriver, until the
upper edge of the float in the sight glass indicates the required
flow rate. Turn the screw anticlockwise to increase the flow.
8. Ensure that the float is stable when the pump is running. No
air bubbles should be observed during this procedure.
9. Set manual pump operation to off (reset to zero).
3.2 Installation of the thermal insulation
1. Refit the front facia moulding onto the rear moulding.
3.3 Check & Adjusting the Flow Rate Master
Control
1. Follow section 3.1 paragraphs 1 to 4.
2. Set the flow rate to:
4 litres if 20 tubes facing West
or 6 litres if 30 tubes facing West
3.0 Commissioning of hydraulic stations
Fig. 5 Adjust the Flow Rate via the
Adjustment Screw
Adjustment
Screw
7
Read at top
of float

Comp No 5132322 - Iss 2 - 6/09
All descriptions and illustrations provided in this leaflet have been carefully prepared but
we reserve the right to make changes and improvements in our products which may affect
the accuracy of the information contained in this leaflet. All goods are sold subject to our
standard Conditions of Sale which are available on request.
MULTIFIT
A Registered Trademark of Baxi Heating UK Ltd (3879156)
A Division of Baxi Group
Brooks House, Coventry Road,Warwick. CV34 4LL
After Sales Service and Technical Enquiries 08700 603261
Our contact centre is open Monday to Friday 8am to 6pm,
Weekends and Bank Holidays 8.30am to 2pm.
We are closed Christmas Day and New Years Day.
Website www.baxi.co.uk
e&oe
4.0 Pump & Sensor Connections
4.1 Pump & Sensor Connections To Solar
Controller
Collector 1 (West facing) temperature sensor connected to
terminals marked T1 (polarity free)
Collector 2 (East facing) temperature sensor connected to
terminals marked T3 (polarity free)
Cylinder temperature sensor connected to terminals marked
T2 (polarity free)
Master Pump circuit to Collector 1 connected to terminals
marked A1 and N (240V terminals – observe polarity)
East/West Pump circuit to Collector 2 connected to terminals
marked A2 and N (240V terminals – observe polarity)
The collector temperature sensors must be installed in the
relevant sensor pockets mounted on the collector.
Refer to the relevant Collector Mounting Installation Guide for
details of the position of the sensor pockets. Only the BLACK
sleeved sensors should be used in the collector.
4.2 Setting The Solar Controller System Parameter
To East West Configuration
• Turn the power off to the solar controller (Master Pump
Station).
• Turn the power back on to the solar controller (settings can
only be adjusted in the first minute of powering up.
• Press the right button until the spanner symbol is displayed
( ).
• Press the down button until sub menu 16 is displayed.
• Now press the right button to access the icon will now be
flashing.
• Press the up/down button until 4 is shown in the display.
• Press the right button so that the OK symbol appears.
• Press the right button again to set and confirm new
parameter 4 (East/West Array).
PE
L
N
N
A1
N
A2
N
A3
WMM
T1
T2
T3
T4
T5
T6
mains 230/240 V area low voltage area (SELV)
PE Earthed connection
L Mains supply live conductor
N Mains supply neutral conductor
A1 Switch output to solar pump
N Neutral wire to solar pump
A2 Switch output 2 to second
system pump if used (east/west)
N Neutral wire switch output 2
A3 Switch output 3 to auxiliary
heating control
N Neutral wire switch output 3
WMM Flow meter
T1 Temp.- sensor collector 1
(West facing)
T2 Temp.- storage tank 1
T3 Temp.- sensor collector
(East facing)
T4 Temp.- sensor collector
return
T5 Temp.- sensor thermostat
or for 2nd temperature
differential controller
T6 Temp.- frost protection or
for 2nd temperature
differential controller
Fuse Rating:T 2A L 250V
8