EL-UK

Electric air heater with plain stainless steel heating coil

EL-UK

For the electric reheating of airflows in circular ducting

Circular electric air heater for reheating airflows, suitable for VAV terminal units TVR and mechanical self-powered CAV controllers RN and VFC

Outlet airflow temperature 50 °C max.
Plain heating coil, stainless steel 1.4301
Integral overheating protection with temperature monitor (auto reset) and thermal cut-out (manual reset)
For horizontal or vertical ducts
Suitable for circular ducts to EN 1506 or EN 13180
With lip seal
Protection level: IP 43
Casing leakage according to EN 15727, class C

General information

Application

Electric air heater for reheating airflows up to 50 °C in circular ducts
For VAV terminal units Type TVR and for CAV controllers Type RN or VFC

Nominal sizes

100, 125, 160, 200, 250, 315, 400

Parts and characteristics

Ready-to-install air heater
Twofold overheating protection:
- Temperature monitor with automatic reset
- Thermal cut-out with manual reset
Connection terminals inside
Casing is ready for cable feedthrough; strain relief and cable gland (M20 or M25) to be provided by others

Construction features

Circular casing with rectangular switch cabinet
Spigot with lip seal, for circular connecting ducts to EN 1506 or EN 13180
The heating coil is an encased plain pipe
IP 43

Material and surfaces

Casing and switch cabinet made of galvanised sheet steel
Heating coil made of stainless steel 1.4301

Standards and guidelines

Casing air leakage to EN 15727, class C

Maintenance

Regular functional tests, especially of the thermal cut-out

Useful additions

Capacity control is required (to be provided by others)
Airflow monitoring is required (to be provided by others)

Technical information

Technical data, QUICK SIZING, SPECIFICATION TEXT, ORDER CODE

Nominal sizes	100 – 400 mm
Volume flow rate range	12 – 750 l/s or 43 – 2700 m³/h
Electrical power consumption	0.4 – 9 kW
Minimum airflow velocity	1.5 m/s (airflow monitoring required, by others)
Maximum outlet airflow temperature	50 °C (capacity control required, by others)
Maximum operating temperature	Without integral control = 40 °C max.
Release temperature – temperature monitor TW	Approx. 60 °C (automatic reset if the value falls below this temperature; hysteresis approx. 15 K)
Release temperature for thermal cut-out	Approx. 90 °C (manual reset on the air heater required)
Air-side static differential pressure	5 – 75 Pa
Supply voltage NS 100	230 V AC, 400 W
Supply voltage NS 125	230 V AC, 900 W
Supply voltage NS 160	230 V AC, 1200 W
Supply voltage NS 200	230 V AC, 2100 W
Supply voltage NS 250	400 V AC 2-phase, 3000 W
Supply voltage NS 315	400 V AC 3-phase, 6000 W
Supply voltage NS 400	400 V AC 3-phase, 9000 W
Protection level	IP 43
EC conformity	EMC to 2014/30/EU, low voltage to 2014/35/EU
Licence	CE, UKCA, S, EAC

Technical data – electric air heater

Basic units: TVR, RN and VFC

NG	q_v		∆p_st[Pa]	t_e = 16 °C
NG	l/s	m³/h	∆p_st[Pa]	P [kW]	t_a [°C]
100	12	43	5	0,4	44
100	20	72	10	0,4	33
100	30	108	15	0,4	27
100	40	144	25	0,4	24
100	45	162	30	0,4	23
125	24	85	5	0,9	48
125	35	126	20	0,9	37
125	50	180	40	0,9	31
125	65	234	60	0,9	27
125	75	270	80	0,9	26
160	30	108	5	1,2	49
160	50	180	10	1,2	36
160	70	252	15	1,2	30
160	95	342	25	1,2	26
160	115	414	35	1,2	25
200	59	210	5	2,1	46
200	80	288	20	2,1	38
200	115	414	35	2,1	31
200	150	540	55	2,1	28
200	180	648	80	2,1	26
250	77	275	5	3	49
250	125	450	15	3	36
250	180	648	25	3	30
250	235	846	40	3	27
250	290	1044	60	3	25
315	153	550	5	6	49
315	200	720	15	6	41
315	285	1026	25	6	33
315	375	1350	40	6	29
315	460	1656	60	6	27
400	228	820	5	9	49
400	325	1170	15	9	39
400	465	1674	30	9	32
400	605	2178	50	9	28
400	750	2700	75	9	26

P: Electrical power consumption
te: Inlet airflow temperature
ta: Outlet airflow temperature
qv: Volume flow rate
Δpst: Static differential pressure

Specification text

Electric air heater for reheating airflows in ventilation and air conditioning systems. Dimensions fit VAV terminal units TVR as well as CAV controllers RN and VFC. Integral twofold overheating protection with temperature monitor and thermal cut-out. Spigot with lip seal for ducts according to EN 1506 or EN 13180. Casing leakage according to EN 15727, class C.

Materials and surfaces

Casing and switch cabinet made of galvanised sheet steel
Heating coil made of stainless steel 1.4301

Technical data

Volume flow rate range: 12 to 750 l/s or 43 to 2700 m³/h
Electrical power consumption: 0.4 to 9 kW
Maximum outlet airflow temperature: 50 °C
Static differential pressure: 5 to 80 Pa
Supply voltage: 1 × 230 V AC to 3 × 400 V AC
Protection level: IP 43

Sizing data

q_v [m³/h]
P [kW]

EL	/	160
\|		\|
1		2

1 TypeEL Electric air heater for air terminal units TVE, TVR and for CAV controllers RN and VFC 2 Nominal size [mm]100, 125, 160, 200, 250, 315, 400
Order Example: EL/160

Nominal size

160 mm

Product details

Access to control equipment box and reset device for the thermal cut-out

④ Reset button

Installation and commissioning

Installation in horizontal or vertical ducts
Capacity control and supply connections to be provided by others
A straight duct section of at least 2D upstream or downstream is required between a bend, a branch, etc., and a component, fan, or flow adjustment damper.
Airflow direction is indicated by an arrow
Switch cabinet can be located on top or at the side

Space required for commissioning and maintenance

Sufficient space must be kept clear near any attachments to allow for commissioning and maintenance. It may be necessary to provide sufficiently sized inspection access openings.

Installation details

Access to control equipment box and reset device for the thermal cut-out

④ Reset button

General information on commissioning

Installation in horizontal or vertical ducts
Installation only in ducts made of non-cumbustible and temperature resistant material
An arrow at the side of the casing indicates the only acceptable airflow direction
A straight duct section of at least 2D is required upstream and downstream of:
- components such as volume flow controllers, flow adjustment dampers, valves and filters
- bends, junctions or a narrowing or widening of the duct
We recommend installing the air heater downstream of a VAV terminal unit, otherwise the terminal unit's flow rate measuring system may be affected by the higher air temperature
The control equipment box may be fitted on the top or at the side (90° max.). The control equipment box must not be fitted at the bottom of the duct
At least 30 mm distance between the sheet metal casing and wood or other combustible materials
Capacity control and supply connections to be provided by others
Airflow monitoring is required and to be provided by others

Correct assignment of types for installation, wiring and commissioning; see also the manufacturer's documentation

Order code	Type according to manufacturer (see installation manual)
EL/100	CV10 - 04 - 1M
EL/125	CV12 - 09 - 1M
EL/160	CV16 - 12 - 1M
EL/200	CV20 - 21 - 1M
EL/250	CV25 - 30 - 2M
EL/315	CV31 - 60 - 3M
EL/400	CV40 - 90 - 3M

Space required

NS	①	②	③
100	320	125	300
125	320	150	300
160	320	185	300
200	320	225	300
250	320	275	300
315	320	340	300
400	320	425	300

Downloads

product information

Product documentationType EL-UK

PD_2020_09_EL_UK_en 690 KB pdf

certificates

Certificate concerning statistical leakage tests

LC_v2_2024_10_DE_en Certificate 650 KB pdf
Certificate concerning statistical leakage tests

LC_v1_2024_10_DE_en Certificate 660 KB pdf

operation manuals

Operation Manual Type EL-UK

1,4 MB pdf

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NS	①	②	③
100	320	125	300
125	320	150	300
160	320	185	300
200	320	225	300
250	320	275	300
315	320	340	300
400	320	425	300

NS	①	②	③
100	320	125	300
125	320	150	300
160	320	185	300
200	320	225	300
250	320	275	300
315	320	340	300
400	320	425	300

EL-UK

For the electric reheating of airflows in circular ducting

General information

Technical information

Technical data, QUICK SIZING, SPECIFICATION TEXT, ORDER CODE

Product details

Installation details

General information on commissioning

Downloads

product information

Product documentationType EL-UK

certificates

Certificate concerning statistical leakage tests

Certificate concerning statistical leakage tests

operation manuals

Operation Manual Type EL-UK

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

FOR THE BEST TROX EXPERIENCE

NS	①	②	③
100	320	125	300
125	320	150	300
160	320	185	300
200	320	225	300
250	320	275	300
315	320	340	300
400	320	425	300