Biddle CASSETTAIR CEILING HEATER User manual

January 2013 Page 1 of 15
CASSETTAIR CEILING HEATER
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING INSTALLATION
Biddle Air Systems Ltd
St. Mary’s Road Nuneaton
Warwickshire England
CV11 5AU
Email: [email protected]
Tel: [phone]
Fax: [phone]
www.biddle-air.co.uk

January 2013 Page 2 of 15
DELIVERY CHECK
The following items are supplied and packaged within the boxes.
Cassettair Ceiling Heater
IEC C13 In-line Power Connector
(screw terminal)
Wall Controller
ECONTROL
Grille
Check the unit and all its packaging for correct delivery. Make sure that all
components and accompanying parts have been supplied. Immediately report
to the supplier if anything is missing or damaged.
For your records
Date of Purchase……………………………..
Place of Purchase…………………………….
Serial Number…………………………………
For warranty purposes proof of purchase is necessary so please
keep a copy of your invoice.
(All documentation supplied with each unit should be stored and kept for future reference)
Mounting
Strips (x2)

January 2013 Page 3 of 15
INSTALLATION OF CASSETTAIR CEILING HEATER
The Cassettair ceiling heater is designed to be recessed within ceiling voids or
bulkheads within a building and located horizontally. It must not be installed
outside of the building.
Location
Cassettair ceiling heaters may be installed anywhere that requires instant, discreet and
trouble-free heating. Cassettair ceiling heaters should be mounted within its height
specification of 1.8m to 3.5m maximum (from floor level to the underside of the
unit/grille).
Cassettair has been designed with the air
inlet and discharge located on the same
profiled face of the grille. Using high
performance centrifugal fans, air entering the
unit passes over the heating coil and is
immediately redistributed through the outlet
grille.
Ceiling Suspension
Cassettair can be mounted either before or
after the ceiling suspended grid system is
installed. The ceiling heater has been
designed to easily fit universal suspended
ceiling grid systems. Ensure there is sufficient
height clearance in the ceiling void for the
heater to be fitted, for dimensional details
refer to Figure 1.
Cassettair is supplied with two mounting
strips (A).
Fit and secure four M10 threaded rods and
locking nuts into each of the mounting strip
slots. These strips may be suspended
together with suitable Unistrut® (B).
Note: threaded rod, locking nuts and
Unistrut® are not supplied. For access,
inspection and maintenance ensure suitable
access is available.
Ensure each of the threaded rods are
secured on to a suitable structure that can
support the 36kg weight of the unit.
Carefully lift the Cassettair into place by
hooking the cassette heater hanging strips
onto the mounting strips (A).

January 2013 Page 4 of 15
Using self-tapped screws supplied fasten the
two safety brackets onto the mounting strips.
Suspending the Cassettair in this way will allow
the heater to be adjusted in any direction,
hence allowing the unit to fit unobtrusively.
Ensure the threaded rods do not come below
bottom face of unit.
It is the sole responsibility of the installer to
ensure that the building fixing points and
suspension system used are suitable for
the ceiling cassette heater being installed.
22mm LPHW Connections
Suitable water mains isolation valves should be fitted in the flow and return pipework.
With the 3-port valve ensure that the pipe connections are connected as detailed
below.
Table 1
KLV1
(2 row coil)
KLV1-CB
(4 row coil)
Water Flow & Return Temperatures (°C)
82/71
60/40
Entering Air Temperature (°C)
18
18
Water Flow Rate at 150V (l/s)
0.16
0.07
Coil + Valve Water Pressure Drop at 150V (kPa)
7.2
4.2

January 2013 Page 5 of 15
Figure 1 –Cassettair KLV1 & KLV1-CB
620 570 570
280
740 - 840
Controls Electrical
Connection
Valve Cable Entry Point
Water Return
Water Flow
620
610
260
180

January 2013 Page 6 of 15
Fitting of the Grille
The grille consists of a profile face with two fixed
hinge mount brackets.
Before lifting the recessed grille into position,
locate the two hinge mount brackets fitted on the
grille frame. With both mount brackets facing
upwards towards the cassette heater, raise grille
to the two spring loaded hinges.
Push one spring loaded hinge, as indicated on
the insert, and locate hinge pin into the
appropriate mount bracket. Repeat with other
spring loaded hinge and affix grille to cassette
heater.
Once the above is complete the recessed hinged
grille can positioned into place.
Fasten the recessed grille by twisting and locking
the two tabs.
For access and servicing the recessed grille is
opened by pulling these two tabs outwards.
Note: with the two tabs released the recessed
grille frame will hinge downwards. With the grille
hinged open caution should be taken.

January 2013 Page 7 of 15
Safety and Electrical Connections
All electrical wiring and connections MUST be carried out by a competent qualified
electrician in accordance with the latest edition of the IEE wiring regulations and/or
local statutory regulations (see Wiring Diagram on Page 11).
A single phase isolator with a contact
separation of at least 3mm in all poles
must be fitted to the supply wiring.
The isolator must be fitted in an
accessible position.
The cassette heater must be earthed.
Ensure that the supply cables, circuit
breakers and other electrical
installation equipment are correctly
sized for the cassette heater being
installed; see Table 2. Connect single
phase supply to IEC C13 in-line
connector plug supplied and fit the
plug to the appropriate IEC socket.
Table 2
KLV1
(LPHW = 82/71°C
EAT = 18°C)
KLV1-CB
(LPHW = 60/40°C
EAT = 18°C)
Heat Output (kW)
150V = 7.1
120V = 5.8
100V = 5.0
150V = 5.6
120V = 4.5
100V = 3.8
Weight (kg)
36
36
Electrical Supply
(V/ph/Hz)
230/1/50
230/1/50
Maximum Power
Consumption (W)
354
354
Maximum Running
Current (A)
1.7
1.7
IEC In-line plug to be
fitted to this socket

January 2013 Page 8 of 15
Fitting/Connecting the ECONTROL Wall Controller
The ECONTROL uses low voltage to communicate via the RJ control cable supplied. The
controller should be located in a suitable place for easy access.
RJ plug from controller to be
fitted to either socket
Open the ECONTROL.
Lead the control cable through an opening
in the back casing.
Fix the back casing to the wall and fasten
the cable, leaving 9cm protruding.
If required set the DIP switches in the front
casing (refer to pages 9 and 12).
Plug the control cable into the socket in the
front casing.
Re-attach the front casing to the back
casing.
The other end of the control cable should
be connected to either one of the sockets
on the side of the heater.
The other socket on the side of the heater
may be used to Master/Slave two or more
cassette heaters.
Always ensure the control cable is safely
secured.

January 2013 Page 9 of 15
Multiple Installation
To Master/Slave two or more cassette heaters together the remote control is plugged into
the Master unit (this can be any of the units) and a RJ lead should be connected from the
Master to the Slave unit(s). RJ control cable extension leads are available from Biddle and
must be ordered separately. Additional cassette heaters, up to a maximum of eight units,
may be connected as indicated below. For Master/Slave configuration an independent
mains electrical supply as per Table 2 must be supplied to each cassette heater.
ECONTROL Controller Motherboard
Function
Control
Comments
Standard
Fan Heat Interlock –
The heat output is governed by the
fan speed. If low or medium fan
speed is selected the heat output
will operate on only first heat stage.
Second stage heating will only
operate on high fan speed.
DIP1 Option
Maximum heat output achieved if
maximum fan speed selected.
Independently set-up DIP switch on
each mother board. This feature
operates in manual or auto mode.
As supplied, the
default setting
would be for
heat and fan
settings to be
independent
(DIP1 OFF).
Disable Fan Run-on –
Disable fan run-on.
DIP2 Option
Must only be used for LPHW cassette
heaters. Independently set-up DIP
switch on each mother board.
As supplied, the
default setting
would disable
fan run-on
(DIP2 ON).
Thermostat Master –
Only the air sensor thermistor in
the master cassette heater will be
used for measuring the reference
air temperature for the whole
master/slave installation.
DIP3 Option
The air sensor thermistors in all the
slave heaters will be ignored. This will
then avoid situations with master/slave
heaters where some units can blow
cold air whilst others can blow warm
air, because they currently all refer to
their own air sensor for control of the
heat output of each heater.
The master heater need not be the
one that the wall control is plugged
into. This dip switch setting must also
be used for Global Switching
(Master/Slave) via the INHIBIT
terminal –see next page.
As supplied, the
default setting
would be for the
air sensor
thermistor on all
units to be
measuring
(DIP3 OFF).
Overheat Fan Disable –
If DIP4 is on and thermal cut-out(s)
operate both heat and fan circuits
are isolated and LED’s on wall
switch flash. If DIP4 is off and
thermal cut-out(s) operate, only the
heating circuit is isolated and the
LED’s on the wall switch flash.
DIP4 Option
(Electric only)
Independently set-up DIP switch on
each mother board.
To remove fault, isolate electrical
supply to heater, reset TOC and
reconnect supply.
As supplied, the
default setting
would enable
fan if TOC trips
(DIP4 OFF).
Fan run-on time set two minutes.
Built-in
If “FAN ONLY” has been selected, at
switch off, no fan run-on.
- white rectangle indicates the moveable head of each 4 way DIP switch
ON
OFF
1 2 3 4
ON
OFF
1 2 3 4
ON
OFF
1 2 3 4
ON
OFF
1 2 3 4

January 2013 Page 10 of 15
DIP switches fitted on the ECONTROL board provide a selection of optional features as described
previously. Isolate and switch electrical power off before configuring and/or changing any DIP switch
settings.
Easy plug-in arrangement for remote air sensor thermistor on a 1m lead. Plugging-in the remote
air sensor to J3 disables the standard air sensor thermistor already fitted on the ECONTROL power
board. As supplied, the board will not have the remote air sensor fitted.
An INHIBIT two screw terminal fitted on the ECONTROL board for BMS remote On/Off feature.
If the terminal is linked, i.e. by 2 wires to a remote volt free contact, the unit will run. If it is open
circuit across the terminal the unit will switch off. This remote On/Off feature has global switching
logic, i.e. if you master/slave several units together you need connect the remote contact to only
one of them to turn all units on and off in the master/slave system. As supplied, a wire link will be
fitted to the terminal block on every unit. For summer settings place a 3.3kΩ resistance across the
INHIBIT terminal, with these settings fans only will run even if controller is requesting for heat.
ECOPOWER BOARD
Customer Building Management System
ECONTROL board

January 2013 Page 11 of 15
Wiring Diagram

January 2013 Page 12 of 15
ECONTROL Operation and DIP Switch Settings
On/Off (I/O)
Press Auto/Manual button (1) to turn the
cassette heater On and operate as follows:-
Press the Auto/Manual button (1) to cycle
between Manual and Automatic modes.
The LED is lit for "Auto Mode" and un-lit for
"Manual Mode".
Manual:
Heat output can be selected as Zero, Half Heat
or Full Heat. Heating levels are selected by
stepping up or down with switches (3) and (2).
Heating level indicator LED's go 0%, 50% or
100% to show the level selected.
Automatic:
The heater measures the incoming air
temperature and automatically selects the
necessary amount of heat to keep it at the level
selected by pressing switches (2) and (3).
Fan Speed
Switches (6), (5) and (4) select fan speed low,
medium or high respectively. The appropriate
LED above each fan speed indicator is
illuminated to show which fan speed is selected.
Pressing the On/Off switch (1) again switches the
heater off with all the LED’s switched off. If a
heater is heating when switched off the fan will
DIP Switch Settings
At the back of the PCB there are four DIP
switches (see above) that provide the following
optional features.
DIP1
Restart on Power-Up –If electrical
supply to the heater is interrupted,
upon restoring electrical supply, the
customer’s settings on the remote
control will be retained. The default is
with this feature ON.
DIP2
Stop Fan on Cold –Fans switch off
when heating level is achieved
(Automatic mode only). The default
setting is with this feature OFF.
DIP3
Never Blow Cold –Unit always
heats in Automatic mode (i.e. will
not go to ambient mode). The
default setting is with this feature
OFF.
DIP4
Air Sensor in Controller –The air
sensor in the remote controller is
enabled (DIP4 ON) and the air
sensor on the ECONTROL
motherboard in the heater is
disabled. Temperature control for
Automatic Mode is then done at the
remote control, which may be an
advantage to limit overheating. The
default setting is with this feature
OFF.
run-on at low fan speed for an extended time
(approx. 2 minutes) to dissipate excess heat.

January 2013 Page 13 of 15
Commissioning
Once the ceiling heater is functioning verify that the fans operate at Low, Medium and
High speeds, that there is no excessive mechanical noise coming from the fans and that
all fans are working. Establish that the air stream from the discharge grille warms up
when heating is selected. Confirm that heating increases as higher heat is selected.
Confirm the heater operates correctly in Manual Mode. Then select Auto Mode and
increase the heating set point until the air stream warms up. Reduce the heating set point
until the air stream goes cold.
Persons using the ceiling heater must be given adequate instruction and supervision
concerning the use of the appliance by a person responsible for their safety. The heater is
not intended for use by persons (including children) with reduced physical, sensory or
mental capabilities.
Before leaving site it is important that the cassette heater installation is “Handed-Over” to
the end user or his representative and the operation of it is fully explained and that they
understand how it operates. Explain also the service intervals and that the unit must be
regularly cleaned.
Fault Conditions
Cassettair ceiling heaters are fitted with two internal electrical fuses located on the
ECONTROL board; 6.3A (T) supplies the fan motors within the cassette heater and
125mA (F) controls the operation of the ECONTROL power board.
If J2 link on the ECONTROL power board is missing, the LED’s on the remote control
will flash and the ECONTROL power board status LED on the board will be permanently
red to indicate a fault. In the case of a fault condition (refer to flowchart), a Biddle
appointed technician or certified electrician should attend the unit to investigate the
reason for the fault. Once the cause has been determined and rectified, they will verify
all the functions operate correctly.
PCB Status
Fitted on the PCB board inside of the ceiling cassette heater is an LED, shown as LED1
on the wiring diagram that will indicate the ECONTROL power control status.
1. LED flashing green –operation normal.
2. LED flashing red –low supply voltage or controller not plugged into ECONTROL
power motherboard.
3. LED permanently red –for LPHW model J2 link missing. Remote Control LED’s
will also flash to indicate a fault.

January 2013 Page 14 of 15
User Fault Finding Flowchart
Yes
Yes
No
Yes
Yes
No
No
No
Yes
Yes
No
Yes
Unit is working
satisfactorily
Switch on Electrical
Power
Connect remote control
and push On/Off switch
to turn unit on
Select heat output
Contact Installer
Contact Installer
Contact Installer
No
Is Electrical
Power
switched on
Are the fans
operating
correctly
Is the unit
discharging
warm air
Are the water
flow and return
temperatures
adequate
Do the LED’s
light up on
the remote
control
Is the remote
control
plugged in
and turned
on
Is LED1
flashing
green
No

January 2013 Page 15 of 15
Service & Maintenance
Always disconnect and isolate the mains electricity supply before installing,
maintaining or repairing this equipment. Note: All maintenance/repairs should
only be carried out by a competent electrician or Biddle appointed technician.
To ensure the cassette heater operates at full efficiency the inlet/outlet grilles, fan
impellers, housings and motors must be kept free of dust and debris. Build up of dust
on the fan impellers can cause vibration, noise and excessive wear on the motor
bearings.
Frequency of cleaning will depend on the environment, but we would recommend that
the unit be cleaned a minimum of every 3 months (failure to adequately maintain the
unit and provide a suitable cleaning schedule will result in performance degradation
and reduce the life expectancy of the heater).
Open the hinged grille by pulling out the two tabs fitted on the side of the grille, see
Page 6. Vacuum and clean the build-up of dirt and debris within the ceiling cassette
heater (please note that the motor(s) are permanently lubricated and require no
additional lubrication).
Once the ceiling cassette heater has been cleaned check all electrical connections
within the unit ensuring terminals are tight and that crimped connections have not
become loose. Re-position the recessed grille ensuring the two tabs at the side of the
grille are correctly locked into place. Reconnect the electrical supply and test all the
functions operate correctly (See Commissioning).
Warranty
If any problems are encountered, please contact your installer/supplier. Failing this
please contact Biddle. All units are covered by a two year warranty period.
Care has been taken in compiling these instructions to ensure they are correct,
although Biddle disclaims all liability for damage resulting from any inaccuracies and/or
deficiencies in this documentation. Biddle retain the right to change the specifications
stated in these instructions.
Biddle Air Systems Ltd
St. Mary’s Road Nuneaton
Warwickshire England
CV11 5AU
Email: [email protected]
Tel: [phone]
Fax: [phone]
www.biddle-air.co.uk