Biddle Forceflow 900 Series Assembly instructions

UNPACKING
Remove protective cardboard outer packaging
and any polystyrene padding.
You should have received your fan convector
in perfect condition. Please advise us within
24 hours of receipt if it is damaged in any
way whatsoever.
TOOLS REQUIRED
We suggest the following tools are used
during installation :
•posi-drive screwdriver
• flat-head electrical screwdriver
•7mm and 10mm nut-driver/socket and ratchet,
with 75mm and 450mm extension pieces
INSTALLATION
1 Remove the access panel by unscrewing
the 2 x retaining screws, or unlocking the
2 x key operated locks, within the front of
the casing
2 Securely fix the unit to the wall or ceiling
using the four fixing holes on the rear
3Checkwhether the water connections are
on the most appropriate side of the unit.
If not, change the ‘handing’ following the
instructions overleaf
4 Using proprietary fixings, connect the flow
and return pipework to the coil (it is usual
to have the water flow connection on the
air leaving side of the coil), bringing the
pipework in through the holes in the base
of the unit - connections areall sized 3/4"
Female BSP
5 Test and vent the coil to expel any air from
the system
6 Feed the power supply cable, and any
other necessary wires (eg remote switch
box, remote thermostats etc), through the
casing utilising the cable gland supplied,
and use the plug supplied to blank off the
hole on the opposite end of the unit
7Remove the black/yellow electrics box by
unscrewing the 2 x retaining M5 hex bolts
8Locate the wiring diagram on the fan scroll
9Carefully following the wiring diagram connect the power supply, and any other
necessaryitems (eg remote switchbox, remote thermostats), to the terminal block
within the black/yellow electrics box
10 Check the electrical connections and supply power
11 Refix the electrics box
12 Set the neon on/off switch to the ‘on’ position
13 Set the speed control switch, typically, to the ‘low’ position
14 Set the summer/winter switch to the appropriate position (see note on back page)
15 Set the on/off thermostat to, typically, 20°C
16 Set the speed change thermostat to, typically, 16°C
17 Re-fix the access panel
MAINTENANCE
Beforecarrying out any maintenance work it is obviously important to isolate the unit
from the power supply, and to ensure it cannot be accidentally restored by
unauthorised personnel.
The standard cardboard frame panel filter is not designed to be cleaned, and should
be replaced at appropriate intervals, which will vary from site to site.
The coil and fans should be cleaned by vacuuming, again at appropriate intervals.
SPARES
Biddle will supply spares for the Forceflow 900 Series fan convector for at least 5
years from the date of manufacture of the unit.
When ordering spares please state the model and serial number from the silver
identification label inside the unit.
Forceflow 900
Series
Fan Convector
Installation Operating
&Maintenance
For specific unit mounting model, please refer to
the brochure or contact Biddle (024 7638 4233)

Biddle Air Systems Limited
St. Mary’s Road, Nuneaton
Warwickshire CV11 5AU
Tel: [phone]
Fax: [phone]
Email: [e-mail]
http://www.biddle-air.com
Controls are either built in to the unit as part of the electrics box, and concealed
behind the access panel, or supplied loose for remote fixing on site.
On/off (T1) thermostat – this is usually set to around 20°C. Once room temperature
reaches this setting the fans automatically turn off.
Speed change (T2) thermostat – this is usually set to circa 16°C. If the speed control
switch is in the ‘low’ position, the fans automatically run at medium speed when room
temperature is below this setting and at low speed when room temperature is above
this setting.
Low temperature cut out (T4) thermostat – clipped on to the return bends of the coil,
this monitors the temperature of the water in the coil and automatically turns the fans
off when it drops below circa 40°C.
On/off switch – the unit can be switched on or off using the neon rocker
switch/remote slider.
Speed control switch - the unit can be set to run at one of three fan speeds. However
it is usual to set the rocker switch to the ‘low’ position/remote slider to position 1.
Summer/winter switch – when the rocker switch is set in the ‘summer’
position/remote slider to the ( ) position it over-rides the low limit cut out (T4)
thermostat and the on/off (T1) thermostat. This allows the unit to continually
re-circulate ambient air when heating is turned off.
When heating is required, the rocker switch should be set in the ‘winter’ position/remote
slider to the ( ❆)position. However the fans will not operate until a water temperature
of at least 40°Cis detected by the low limit cut out (T4) thermostat.
WARNING –if a remote on/off (T1) thermostat is installed with a remote switch box the on/off (T1)
thermostat will remain live even when the on/off switch is in the ‘off’ position.
Remote thermostat
Remote switch box
Model
915
930
935
940
975
Full Load
Current
(Amps)
0.33
0.49
0.45
0.50
1.70
Start Current
(Amps)
0.47
0.68
0.67
0.68
3.55
All units aresuitable for 240 volt, 1phase, 50Hz
supply
Operation
Electrical Data
5.08 Nine Point High • Nuneaton • England
If electric heated unit:
The T1 and T2 thermostats should be set at
around 20°C and 16°C respectively.
The T2 thermostat will change heat output
(as the room warms from 3kW to 1.5kW)
rather than fan speed.
The T1 thermostat will turn the fans and
heating off when the set-point temperature
is reached.
The fans will run at a single speed as set by
the speed control rocker switch/remote slider.

1Removing Access Panel 2 Removing Top Panel 3 Removing Filter
4Removing Blanking Plates 5 Removing Coil 6 Removing Electrics Box
7Removing Fan Deck 8 Removing Fan Brackets 9 Moving Fan Brackets
Changing the Unit Handing
Steps 1 - 9

Clip T4 thermostat on
return bends of coil.
Coil is attached to back
plate using 4x M6 nuts.
Coil can be plumbed in at this stage.
10 Changing Coil Handing 11 Re-attaching Fan Deck 12 Changing Electrics Box Handing
13 Re-attaching Electrics Box 14 Re-attaching Coil 15 Re-attaching Blanking Plates
16 Re-attaching Filter 17 Re-attaching Top Panel 18 Re-attaching Access Panel
Changing the Unit Handing
Steps 10 - 18