C-RECESSED RANGE AIR CURTAINS
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING INSTALLATION
Thermoscreens Ltd
St. Mary’s Road Nuneaton
Warwickshire England
CV11 5AU
Email: sales@thermoscreens.com
Tel: +44 (0) 24 7638 4646
Fax: +44 (0) 24 7638 8578
www.thermoscreens.com
4001150-8 UK Page 1 of 16
UN-PACKING YOUR C-RECESSED AIR CURTAIN
The following items are supplied and packaged within the boxes.
C-Recessed Air Curtain
Motorised Valve
(Ecopower LPHW units only)
Remote Control
Ecopower
Electric & LPHW
Manual Ambient
Recessed Grille
If anything is missing or damaged please contact your place of purchase immediately.
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).
4001150-8 UK Page 2 of 16
INSTALLATION OF YOUR HORIZONTAL APPLICATION C-RECESSED AIR CURTAIN
The C-Recessed air curtain has been designed for recessing within ceiling voids
or bulkheads.
Location
Ensure that the unit is mounted within its height
specification of 1.8m to 2.75m maximum (from floor
level to the underside of the unit/grille) and that it is
situated as close to the door as possible.
Note: The air discharge should be nearest to the
door as shown in adjacent figure. Ensure the air
curtain is as close to the door opening as possible
for best performance, obstructions such as door
opening devices, structural beams etc will reduce
the performance.
Note the C-Recessed air curtain has a series of punched air ventilation slots along one side
panel of the unit which will be within the ceiling void once the unit is installed. There must
be an air gap of 50mm minimum between these ventilation holes and any
obstruction/bulkhead within the ceiling void to allow ventilation air to easily enter the air
curtain via these slots. Furthermore, the ceiling void must be sufficiently large and freely
ventilated so there will be an adequate supply of ventilation air (m
1. If the ceiling void is enclosed around the air curtain it will need an air ventilation grille of
effective free area (cm
to enter the punched air ventilation slots.
Table 1
Air curtain
2
) as given in Table 1 and an adequate air path within the void for air
Required air flow within
ceiling void (m3/hr)
Effective free area of ventilation grille
for an enclosed ceiling void (cm2)
3
/hr) to the unit, see Table
C1000R 353 500
C1500R 421 700
C2000R 707 1200
Ceiling Suspension
Make the cut-out in the ceiling to the dimensions given in Figure 1, ensuring the length of
the hole is exact. The air curtain will fit through the ceiling cut-out, ensure there is sufficient
height clearance in the ceiling void to do this. Alternatively, the ceiling can be fitted after the
air curtain has been installed.
Clearance holes for M8 threaded rod to enter from
above are provided on the top face of the casing (4x,
for dimensions see Figure 1) allowing the unit to be
suspended. Insert rod through each hole in top and
fixing
bracket
attach onto each fixing bracket at lower edge of air
curtain (see insert). Lock rod in place using M8 nut
above and below fixing bracket (threaded rod and
locking nuts are not provided). Ensure rod does not
come below bottom face of unit.
Ensure each of the threaded rods are secured on to
a suitable structure that can support the weight of
the unit (for unit weights see Table 2)*.
* It is the sole responsibility of the installer to ensure that the building fixing points and
suspension system used are suitable for the air curtain being installed
4001150-8 UK Page 3 of 16
Electrical
supply inlet
33
1m-140
1.5m-140
2m-150
165
B
206
CEILING LEVEL
C
25-85mm
A
22
2040
C2000R
2090
LPHW connectio n s
Rp 1/2 (1/2" BSP female)
257
22
301
Figure 1
353
1579
1529
C1500RC1000R
1179B(mm)
1129
A(mm)
1209 1609 2120
C(mm)
15791179 2090
301 301 301
Width(mm)
Length(mm)
Cut-Out
in Ceiling
4001150-8 UK Page 4 of 16
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.
A single phase or 3 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 air curtain must be earthed.
The appliance must be connected using cables having an appropriate temperature
rating (heat resistant).
Ensure that the supply cables, circuit breakers and other electrical installation equipment
are correctly sized for the air curtain being installed; see Table 2.
On a 3 phase electrical supply the unit requires a neutral connection (3N~).
Cable glands used for the Electrical Input must be rated IP21 or higher.
Table 2
Air Curtain Electrical
Supply
Rated Power
Input (kW)
Current per
phase (A)
Heat Output
(kW)
Weight
(kg)
(V/ph/Hz)
C1000AR 230/1/50 0.15 0.7 N/A 19
C1500AR 230/1/50 0.20 0.9 N/A 25
C2000AR 230/1/50 0.25 1.1 N/A 35
C1000WR 230/1/50 0.15 0.7 6.0 22
C1500WR 230/1/50 0.20 0.9 9.0 30
C2000WR 230/1/50 0.25 1.1 12.0 41
C1000ER 400/3/50 9.15 13.7 4.5/9.0 20
C1500ER 400/3/50 12.20 18.3 6.0/12.0 27
C2000ER 400/3/50 18.25 27.2 9.0/18.0 37
Fitting of the Recessed Grille
The grille consists of a frame, grille core (fitted within
the frame) and four brackets (note: the brackets are
fixed to the frame).
Removal of Grille Core
Prior to fitting the grille to the air curtain and the
ceiling the grille core will need to be removed from its
frame. Release the grille core by unfastening the two
conical head bolts fitted at each end of the grille core.
Push against the spring loaded pins and the grille
core can now be pulled clear of its frame.
Note: the grille core will still be attached to the
frame via cord safety ties.
The rectangular hole in the ceiling must be
sized to suit the grille frame, see Figure 1
for dimensions.
4001150-8 UK Page 5 of 16
Attaching the Grille to the Air Curtain
Before lifting the grille frame into position locate the four M6 bolts (two inside each end
of the air curtain). Remove the M6 bolts and lift the frame into position (ensure that
when fitted the air discharge vanes align with the air discharge of the air curtain, see
Figure 1), screw each M6 bolt through the slot in the grille bracket until all four are
located into place. Adjust the height of the grille frame (via slots in brackets) so the
frame fits nicely against the under side of the ceiling. Once the desired height is
achieved tighten each M6 bolt in place locking the grille frame into the correct position.
Adjusting the Separator Plate
Within the air curtain there is a sliding separator plate,
this needs adjusting up or down to stop the air
discharge re-circulating within the air curtain. To adjust
the separator plate release the M6 bolts at either end,
extend the slide plate so that it will just touch the
topside of the grille along its whole length and tighten
the bolts. It will be necessary to fit the grille core to
gauge where the separator plate should be fitted.
Fitting the Grille Core
Once the above is complete the grille core can be refitted, to do so locate each spring
loaded pin in its locating hole, push against the spring loaded pins to allow the fixed pins
to locate within their fixing holes. Tighten and secure the conical head bolts fitted at
each end of the grille core.
Once the ceiling is finished remove the protective plastic film from the recessed grille
frame.
LPHW Models
For LPHW models ensure suitable water mains isolation valves are fitted in the flow
and return pipework. When fitting the 3-port valve ensure that the pipe connections are
fitted as detailed below and are in accordance with the manufacturers leaflet supplied
with the valve.
4001150-8 UK Page 6 of 16
Air Curtain Water Flow Rate (l/s)
Coil Water Pressure Drop (kPa)
82/72 °C
C1000WR 0.14 2.77
C1500WR 0.21 6.74
C2000WR 0.29 13.40
Ambient Models
Ambient units are supplied with a remote switch unit.
The switch unit allows the air curtain to be powered
ON/OFF and select one of three fan speeds.
Fitting/Connecting the Remote Control
The Ecopower Plus controller uses extra low voltage to communicate via the RJ control
cable supplied. The controller should be located in a suitable place for easy access, it
can be fixed to the wall via various fixing slots
provided in the back case or onto an electrical
switch box (not provided). To mount controller
onto an existing switch box, feed one end of the
control cable through the switch box (see insert).
Using a screwdriver undo screw mounted on
the top of the controller case. Pull the front case
slightly forwards and lift the back case away.
Feed and secure the RJ control cable through
one of the openings in the back case and
secure back case to switch box using 2 x M3.5
mounting screws (not provided).
With the cable RJ plug locking clip lying nearest
to controller PCB, connect the RJ plug to the RJ
socket on the board.
Note: For controller DIP switch options refer to
Ecopower Plus Remote Control Operation and
DIP Switch Settings.
Refit the controller front case to the back case.
The air curtain end of the control cable should be
connected to one RJ socket fitted either on the
top panel for NT or the Ecopower motherboard
inside a recessed air curtain. Ensure the control
cable is safely secured.
4001150-8 UK Page 7 of 16
Multiple Installation (Ecopower only)
To Master/Slave two or more air curtains together the remote control is plugged into the
Master unit and a RJ lead should be connected from the Master to the Slave unit(s).
Thermoscreens 3m RJ extension leads are available and must be ordered separately.
Additional air curtains, up to a maximum of eight units, may be connected as indicated
below. For Master/Slave configuration an independent mains supply as per Table 2 must
be supplied to each air curtain.
Ecopower Controller Motherboard
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.
Disable Fan Run-on –
Disable fan run-on.
Thermostat Master –
Only the air sensor thermistor in
the master air curtain will be used
for measuring the reference air
temperature for the whole
master/slave installation.
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.
Fan run-on time set two minutes.
- white rectangle indicates the moveable head of each 4 way DIP switch
Function
Control Comments Standard
DIP1 Option
ON
OFF
1 2 3 4
DIP2 Option
(LPHW &
Ambient only)
ON
OFF
1 2 3 4
DIP3 Option
ON
OFF
1 2 3 4
Suitable on vertical electrically heated
Designer air curtain. 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.
Must only be used for LPHW and
Ambient air curtains. Independently
set-up DIP switch on each mother
board.
The air sensor thermistors in all the
slave air curtains will be ignored. This
will then avoid situations on larger
doorways with master/slave air
curtains 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 air curtain.
As supplied, the
default setting
would be for
heat and fan
settings to be
independent
(DIP1 OFF).
As supplied, the
default setting
would enable
fan run-on
(DIP2 OFF).
As supplied, the
default setting
would be for the
air sensor
thermistor on all
units to be
measuring
(DIP3 OFF).
The master air curtain 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.
DIP4 Option
(Electric only)
ON
OFF
1 2 3 4
Built-in
Independently set-up DIP switch on
each mother board.
To remove fault, isolate electrical
supply to air curtain, reset TOC and
reconnect supply.
If “FAN ONLY” has been selected, at
As supplied, the
default setting
would enable
fan if TOC trips
(DIP4 OFF).
switch off, no fan run-on.
4001150-8 UK Page 8 of 16
DIP switches fitted on the Ecopower board provide a selection of optional features as described
above. 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 Ecopower board.
As supplied, the board will not have the remote air sensor fitted.
An INHIBIT two screw terminal fitted on the Ecopower 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.
Customer Building Management System
ECOPOWER BOARD
A HEALTHY two screw terminal is included on the board for a fault signal indication if the electric
elements overheat cut-out has operated. A healthy system provides a 24V DC signal at the
terminals compared to an overheat fault which provides OV DC.
4001150-8 UK Page 9 of 16
4001150-8 UK Page 10 of 16
4001150-8 UK Page 11 of 16
4001150-8 UK Page 12 of 16
Ecopower Plus Remote Control Operation and DIP Switch Settings
7
Heating Level
Scale
6
4
3
5
1
2
On/Off (I/O)
Press On/Off switch (1) to turn the air curtain
On and operate as follows:-
Press Auto switch (2) to cycle between Manual
and Automatic modes. The Auto on indicator
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 (4).
Heating level indicator LED's go 0%, 50% or
100% to show the level selected.
Automatic:
If DIP switches 1, 2 and 4 on the Ecopower
motherboard are set to OFF, the air curtain
measures the incoming air temperature and
automatically selects the necessary amount of
heat to keep it at the level selected.
Fan Speed
Switches (5), (6) and (7) 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
air curtain off with all the LED’s switched off. If a
heated air curtain is heating when switched off
the fan will run-on at low fan speed for an
extended time (approx. 2 minutes) to dissipate
excess heat.
Do not switch the air curtain On/Off from the isolator. If the mains supply is
isolated or cuts-out during operation the safety thermal cut-out(s) for electric
heated air curtains within the air curtain may operate. If this happens the
thermal cut-out(s) will need to be reset by a competent technician.
DIP Switch Settings
At the back of the Ecopower Plus remote
control PCB there are four DIP switches (see
above) that provide the following optional
features.
DIP1 Restart on Power-Up – If electrical
supply to the air curtain 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 Ecopower
motherboard in the air curtain is
disabled. Temperature control for
Automatic Mode is then done at the
remote control, which may be an
advantage to limit overheating of the
door entrance area. The default
setting is with this feature OFF.
4001150-8 UK Page 13 of 16
Commissioning
Once the air curtain is functioning check 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. If the unit is electric heated or water heated check that the air stream
from the discharge grille warms up across the whole length of the air curtain when heating
is selected. Check that heating increases as higher heat is selected and feel to see that
the warm air stream is reaching across the doorway with door open or closed. If an
Ecopower controller is being used check its operation 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.
Explain to the end user that the doorway should be closed whenever possible but that during
times of high pedestrian use it will become effectively ‘open doorway’. The air curtain serves
an essential purpose by saving energy and providing comfort to the occupants when
compared to an open doorway with no air curtain fitted.
Before leaving site it is important that the air curtain 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
In the event of a fault with electrical heated air curtains the thermal cut out(s) may
operate. Note: If the mains supply is isolated during operation then the thermal cut outs
may operate.. The thermal cut out(s) are located within the unit directly above the
electric element banks (one on the 1 & 1.5m and two on the 2m model). For Ecopower
units two internal electrical fuses are located on the Ecopower board; 6.3A (T) supplies the
fan motors within the air curtain and 125mA (F) controls the operation of the Ecopower
board. For Ambient and Standard LPHW units the fuse is located within the control panel at
the left hand end of the air curtain.
If for an electric heated air curtain an overheat fault occurs, or if J2 link is missing for LPHW
models, the LED’s on the remote control will flash and the Ecopower board status LED on
the board will be permanently red to indicate a fault.
In the case of a fault condition (refer to flowchart) do not attempt to reset the thermal cut
outs or replace the fuses, arrange for a Thermoscreens appointed technician or certified
electrician to attend the unit to investigate the reason why the thermal cut outs/fuse(s)
have operated. Once the cause has been determined and rectified, they will
reset/replace the thermal cut out/fuse and function test the unit.
PCB Status
Fitted on the PCB board inside of the air curtain is an LED shown as LED1 on wiring
diagrams that will indicate the Ecopower control status.
1. LED flashing green – operation normal.
2. LED flashing red – low supply voltage or controller not plugged into Ecopower
motherboard.
3. LED permanently red – thermal cut outs open circuit (electrically heated models) or
J2 link missing (LPHW models). Remote Control LED’s will also flash to indicate the
thermal cut-out(s) has operated or J2 link is missing.
Note to reset the thermal cut outs please refer to Fault Conditions section detailed
above.
4001150-8 UK Page 14 of 16
User Fault Finding Flowchart (for Ecopower Control)
Service Agent to
reset thermal cut-
out(s)
Service Agent to
investigate why
thermal cut-out(s)
have operated
Is Electrical
Power
switched on
Yes
Are the fans
operating
correctly
Yes
Select heat output
No
No
Do the LED’s
light up on
the remote
control
Yes
Switch on Electrical
Power
Connect remote control
and push On/Off switch
to turn unit on
No
No
Is the remote
control
plugged in
and turned
on
Yes
Yes
Check if thermal
cut-out(s) have
tripped (Electric
Heated only)
No
Contact Installer
No
Contact Installer
Is the unit
discharging
warm air
Yes
Unit is working
satisfactorily
4001150-8 UK Page 15 of 16
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 Thermoscreens appointed
technician.
To ensure the air curtain 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 air-curtain).
Remove the grille from the air curtain. Vacuum and clean the build-up of dirt and
debris within the air-curtain (please note that the motor(s) are permanently lubricated
and require no additional lubrication).
Once the air curtain has been cleaned check all electrical connections within the unit
ensuring terminals are tight and that crimped connections have not become loose.
Re-install the recessed grille ensuring the straight louvers are directly under the air
discharge and the 45° louvers are directly under the air intake. Reconnect the
electrical supply and fully function test the air-curtain to ensure correct operation (See
Commissioning).
Warranty
If any problems are encountered, please contact your installer/supplier. Failing this
please contact the Thermoscreens warranty department. All units are covered by a
two year warranty period.
Care has been taken in compiling these instructions to ensure they are correct, although
Thermoscreens disclaims all liability for damage resulting from any inaccuracies and/or
deficiencies in this documentation. Thermoscreens retain the right to change the
specifications stated in these instructions.
Thermoscreens Ltd
St. Mary’s Road Nuneaton
Warwickshire England
CV11 5AU
Email: sales@thermoscreens.com
Tel: + 44 (0) 24 7638 4646
Fax: + 44 (0) 24 7638 8578
www.thermoscreens.com
4001150-8 UK Page 16 of 16
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