Biddle Forceflow 900 Series Installation, Operating, & Maintenance Instructions page 2

Biddle Air Systems Limited
St. Mary's Road, Nuneaton
Warwickshire CV11 5AU
Tel: +44 (0)24 7638 4233
Fax: +44 (0)24 7637 3621
Email: sales@biddle-air.co.uk
http://www.biddle-air.com
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.
Electrical Data
Model Full Load Start Current
Current
(Amps)
915 0.33
930 0.49
935 0.45
940
0.50
975
1.70
All units are suitable for 240 volt, 1 phase, 50Hz
supply
Operation
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 (
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 (
of at least 40°C is detected by the low limit cut out (T4) thermostat.
(Amps)
0.47
0.68
0.67
0.68
3.55
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.
5.08
) position it over-rides the low limit cut out (T4)
) position. However the fans will not operate until a water temperature
A
Remote thermostat
Remote switch box
Nine Point High • Nuneaton • England