FRENGER systems FRT Series Manual

AIR CURTAIN
FRT RANGE
INSTALLATION, OPERATION
AND MAINTENANCE
INSTRUCTIONS

FR-T Recessed Air Curtain
Operation and Maintenance
Frenger Systems Limited
Page 1 of 30
FR-T Recessed Air Curtain
Riverside Road, Pride Park, Derby, DE24 8HY
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
www.frenger.co.uk
Frenger Systems is an FTF Group Company
Registered in England No.03064483. Registered office: 14 Park Row, Nottingham, NG1 6GR. VAT Registration No. 646 6229 20
1.0 –Electrical Safety
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 1 phase or 3 phase local isolator having a contact separation of at least 3mm on all poles must be fitted in
the electrical supply to the air curtain and located in an accessible position adjacent to the unit.
•The appliance must be connected by cables having an appropriate heat resistant temperature rating.
•All supply cables, circuit breakers and other electrical installation equipment must be correctly sized for the
air curtain model being installed; see section 3: Specifications.
•Models operating on 3 phase electrical supply - see section 3: Specifications - require a neutral connection
(3N~).
•A 25mm size cable gland or conduit connector of IP21 rating or above should be used for the Electrical
Supply into the air curtain.
•See Wiring Diagram for connecting electrical supply and control cables to the air curtain. The air curtain must
be earthed.
2.0 –Specifications
Air Curtain
Model No.
Electrical Supply
(V/ph/Hz)
Rated Electrical
Power Input
(kW)
Rated Current
per phase (A)
Heat Output
[Low/High] (kW)
Weight (kg)
FR-T 1000AR
230/1/50
0.25
1.1
N/A
27
FR-T 1500AR
230/1/50
0.35
1.7
N/A
40
FR-T 2000AR
230/1/50
0.45
2.0
N/A
50
FR-T 1000WR
230/1/50
0.25
1.1
6.0 / 12.0
29
FR-T 1500WR
230/1/50
0.35
1.7
9.0 / 18.0
42
FR-T 2000WR
230/1/50
0.45
2.0
12.0 / 24.0
53
FR-T 1000E9R
400/3/50
9.25
14.1
6.0 / 9.0
28
FR-T 1000E12R
400/3/50
12.25
18.7
6.0 / 12.0
28
FR-T 1500E12R
400/3/50
12.35
18.9
6.0 / 12.0
41
FR-T 1500E18R
400/3/50
18.35
27.9
9.0 / 18.0
41
FR-T 2000E18R
400/3/50
18.45
28.1
12.0 / 18.0
52
FR-T 2000E24R
400/3/50
24.45
36.8
12.0 / 24.0
52

FR-T Recessed Air Curtain
Operation and Maintenance
Frenger Systems Limited
Page 2 of 30
FR-T Recessed Air Curtain
Riverside Road, Pride Park, Derby, DE24 8HY
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
www.frenger.co.uk
Frenger Systems is an FTF Group Company
Registered in England No.03064483. Registered office: 14 Park Row, Nottingham, NG1 6GR. VAT Registration No. 646 6229 20
3.0 - Introduction
Frenger is a market leading brand, renowned worldwide for specialist heating and cooling solutions. As with all our
products, the FR-T range of Air Curtains are designed with energy-efficiency in mind.
FR-T models suffixed ER, WR or AR are designed to be recessed inside a building and located horizontally over a doorway.
Please complete the following details for your reference:
Date of Purchase:
Place of Purchase:
Serial Number:
Proof of purchase is required to make a claim under warranty.
Frenger Systems Ltd.
Riverside Road
Pride Park
Derby
DE248HY
Email: [e-mail] | https://www.frenger.co.uk
Tel: [phone] | Fax: [phone]

FR-T Recessed Air Curtain
Operation and Maintenance
Frenger Systems Limited
Page 3 of 30
FR-T Recessed Air Curtain
Riverside Road, Pride Park, Derby, DE24 8HY
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
www.frenger.co.uk
Frenger Systems is an FTF Group Company
Registered in England No.03064483. Registered office: 14 Park Row, Nottingham, NG1 6GR. VAT Registration No. 646 6229 20
4.0 –Delivery Contents
The following items are supplied in the box at delivery.
Recessed Grille 3-port control valve Outdoor Air Thermostat (for water heated units) (Optional –supplied by installer)
NOTE: If any parts are missing or damaged contact your place of purchase.
FR-T Recessed Air Curtain
Ecopower Remote Control
(for Electric and Water Heated units)
Remote Control Switch
(for Ambient units)
Recessed Grille
3-port control valve
(for water heated units)
Outdoor Air Thermostat
(Optional –supplied by installer)

FR-T Recessed Air Curtain
Operation and Maintenance
Frenger Systems Limited
Page 4 of 30
FR-T Recessed Air Curtain
Riverside Road, Pride Park, Derby, DE24 8HY
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
www.frenger.co.uk
Frenger Systems is an FTF Group Company
Registered in England No.03064483. Registered office: 14 Park Row, Nottingham, NG1 6GR. VAT Registration No. 646 6229 20
5.0 –Tools Required
The following tools are required for installation:
•Flat blade screwdrivers
•Pozi head screwdrivers
•10mm spanner
•Adjustable spanner
•Electric drill
•Ladders
•Appropriate lifting equipment
•Appropriate tools for cutting ceiling aperture
6.0 –Installation
The air curtain is designed to be recessed within ceiling voids or bulkheads within a building and located horizontally
over a doorway. It must not be installed outside of the building.
6.1 –Location
Mount the air curtain above and as close to the doorway as possible
with:
•The recessed grille not more than 3m above floor level
•The air discharge (see 1, Fig 1) section of the recessed grille
nearest the doorway and the air inlet section (see 2, Fig 1)
furthest from the doorway.
•Beware of doorway top edges, structural beams, door
opening/closure devices etc. which may interfere with the air
stream and affect the location of the unit.
NOTE: For the air curtain to work well, the doorway should be less than the width of the airstream.
Fig 1

FR-T Recessed Air Curtain
Operation and Maintenance
Frenger Systems Limited
Page 5 of 30
FR-T Recessed Air Curtain
Riverside Road, Pride Park, Derby, DE24 8HY
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
www.frenger.co.uk
Frenger Systems is an FTF Group Company
Registered in England No.03064483. Registered office: 14 Park Row, Nottingham, NG1 6GR. VAT Registration No. 646 6229 20
6.2 –Ceiling Suspension
Step 1
Step 2
Depending on whether a standard or wider
width recessed grille is used, cut an aperture in
the ceiling to the dimensions in Appendices 1.
Cut notches, if necessary, to clear screws in the
air curtain casing.
NOTE: For LPHW models, pipework will need to be
installed above the curtain. Allow sufficient access and
height clearance within the ceiling void to do this.
Fix M10 threaded rods (not supplied) through
the 2 holes at each end in the top casing (see
Fig 2). Feed the rods through the casing and
attach to fixing brackets near the bottom of the
unit (see Fig 3, looking up into the air curtain).
Use M10 lock-nuts either side of fixing brackets
to secure hanging rods. An additional threaded
rod is fitted on a 1.5m unit with two extra
threaded rods fitted on a 2m unit, see
Appendices 1.
NOTE: Do not let the hanging rods come below the
bottom of the unit casing or they may prevent the
recessed grille fitting properly.
Fig 2
Fig 3

FR-T Recessed Air Curtain
Operation and Maintenance
Frenger Systems Limited
Page 6 of 30
FR-T Recessed Air Curtain
Riverside Road, Pride Park, Derby, DE24 8HY
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
www.frenger.co.uk
Frenger Systems is an FTF Group Company
Registered in England No.03064483. Registered office: 14 Park Row, Nottingham, NG1 6GR. VAT Registration No. 646 6229 20
Step 3
Step 4
Step 5
If you are installing model FR-T 1500R, fit a 5th M10 threaded rod into the hanging point in the
middle of the unit. For model FR-T 2000R, fit 5th and 6th threaded rods, see Appendices 1 and
Fig 4.
Secure each rod to a suitable structure than can support the weight of the unit (see section 3:
Specifications for weights).
Adjust the height of the unit on its hanging rods so the bottom surface of the casing goes
between 25-50mm up into the ceiling as shown in Fig 4. Ensure the unit is level.
WARNING: It is the sole responsibility of the installer to ensure that the fixing locations and suspension system
used are suitable for the air curtain being installed.

FR-T Recessed Air Curtain
Operation and Maintenance
Frenger Systems Limited
Page 7 of 30
FR-T Recessed Air Curtain
Riverside Road, Pride Park, Derby, DE24 8HY
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
www.frenger.co.uk
Frenger Systems is an FTF Group Company
Registered in England No.03064483. Registered office: 14 Park Row, Nottingham, NG1 6GR. VAT Registration No. 646 6229 20
6.3 –Attaching the recessed grille to the air curtain
The recessed grille consists of:
•Metal frame
•Hinged standard or wider width inlet/discharge grille
•Slotted fixing brackets
There are 4 fixing slotted brackets on the FR-T 1000R with 6 brackets fitted on FR-T 1500R and FR-T 2000R (see Fig 5a
and Fig 5b).
Fig 5a; standard width grille
Fig 5b; wider width grille

FR-T Recessed Air Curtain
Operation and Maintenance
Frenger Systems Limited
Page 8 of 30
FR-T Recessed Air Curtain
Riverside Road, Pride Park, Derby, DE24 8HY
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
www.frenger.co.uk
Frenger Systems is an FTF Group Company
Registered in England No.03064483. Registered office: 14 Park Row, Nottingham, NG1 6GR. VAT Registration No. 646 6229 20
Fix the grille as follows:
Step 1
Step 2
Step 3
Step 4
Step 5
Open the hinged inlet grille using a flat bladed
screwdriver to release the quarter turn
fasteners (see Fig 6). There are two fasteners on
FR-T 1500R and FR-T 2000R units. Before lifting
the grille frame into position, remove four (six
on FR-T 1500R/FR-T 2000R) M6 bolts fitted on
the inside edge of air curtain.
Make sure the grille will go the correct way
around (discharge nearest to doorway). Offer
the recessed grille up through the cut-out in the
ceiling.
Using the M6 bolts removed in Step 1, secure
grille by fixing each bolt through the slotted
brackets as shown in Fig 8. For illustration
purposes Fig 8 details a wider recess grille. With
the hinged grille open, adjust the height of the
grille frame via slots in each bracket, so frame is
snug fit against the ceiling with no gaps all the
way around.
To stop discharge air re-circulating within the
air curtain a sliding separator will need
adjusting up or down (see Fig 9). To adjust plate
release M6 bolts either end, extend the slide
plate so that it will touch the topside of the
grille along its whole length and tighten the
bolts. It will be necessary to close the hinged
grille core to gauge where the separator plate
should be fitted.
Once the above steps are complete the hinged
grille core can be closed, and all the quarter
turn fasteners tightened up.
NOTE: Open the hinged grille core to gain access to
electrical connections, and for servicing and
maintenance.
Fig 6
Fig 7
Fig 8
Fig 9
Fig 10

FR-T Recessed Air Curtain
Operation and Maintenance
Frenger Systems Limited
Page 9 of 30
FR-T Recessed Air Curtain
Riverside Road, Pride Park, Derby, DE24 8HY
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
www.frenger.co.uk
Frenger Systems is an FTF Group Company
Registered in England No.03064483. Registered office: 14 Park Row, Nottingham, NG1 6GR. VAT Registration No. 646 6229 20
7 –LPHW Models
For LPHW models ensure that water isolation valves are fitted in the flow and return pipework adjacent to the air
curtain and connected correctly as shown in the diagram in Appendix 1.
For the design of the water pipework system and pump, water flow rates and pressure drops for maximum heat
output of the air curtain are given in Table 2 below.
Air Curtain
Water Flow Rate
(l/min at 82/71°C)
Water Pressure Drop
(kPa)
FR-T 1000WR, 2-row (12kW)
15.6
16.1
FR-T 1500WR, 2-row (18kW)
23.4
10.4
FR-T 2000WR, 2-row (24kW)
31.2
16.3
Air Curtain
Water Flow Rate
(l/min at 60/40°C)
Water Pressure Drop
(kPa)
FR-T 1000WR, 3-row (12kW)
8.6
8.3
FR-T 1500WR, 3-row (18kW)
12.9
18.2
FR-T 2000WR, 3-row (24kW)
17.1
15.0
The installer must connect the 3-port valve in the heating pipework as shown in Figure 11 below:
NOTE: Water Pressure Drop is across the flow and return pipework to the air curtain and includes for the coil
fitted inside the unit and the valve fitted in the heating pipework to the unit. Water flow rated and pressure
drops at different water temperatures can be calculated using the coil calculation programme.
Fig 11