TVR-Ex

Functional description

The VAV terminal unit is fitted with a differential pressure sensor for measuring the volume flow rate.

The control components (attachments) include a differential pressure transducer that transforms the differential pressure (effective pressure) into an electric signal, a controller, and an actuator.

For most applications, the setpoint value comes from a room temperature controller which is installed outside of the potentially explosive atmosphere.

The controller compares the actual value with the setpoint value and alters the control signal of the damper actuator if there is a difference between the two values.

The connections for the supply voltage and for the voltage signals are made in a terminal box that is suitable for use in potentially explosive atmospheres.

Quick sizing: Sound pressure level at differential pressure 150 Pa

Nominal size	V	V	Air-regenerated noise	Air-regenerated noise	Air-regenerated noise	Air-regenerated noise	Case-radiated noise
Nominal size	V	V	①	②	③	④	①
Nominal size	V	V	LPA	LPA1	LPA1	LPA1	LPA2
Nominal size	l/s	m³/h	dB(A)	dB(A)	dB(A)	dB(A)	dB(A)
125	22	79	36	25	16	<15	16
125	60	216	45	36	30	28	25
125	105	378	49	40	34	32	31
125	150	540	52	41	34	32	35
160	35	126	41	30	22	19	22
160	100	360	47	39	34	31	28
160	175	630	50	42	37	34	32
160	250	900	53	44	39	36	37
200	60	216	41	32	24	22	21
200	160	576	47	40	34	33	29
200	280	1008	50	44	40	38	32
200	405	1458	54	45	39	38	38
250	90	324	38	30	24	22	22
250	245	882	47	40	34	32	35
250	430	1548	48	42	38	37	37
250	615	2214	52	44	38	37	42
315	145	522	43	36	29	26	29
315	410	1476	47	42	35	34	39
315	720	2592	49	44	39	38	42
315	1030	3708	53	48	42	41	46
400	240	864	43	36	29	26	31
400	670	2412	44	38	32	30	37
400	1175	4230	47	42	36	35	41
400	1680	6048	50	44	38	37	46

① TVR-Ex

② TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 500 mm

③ TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 1000 mm

④ TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 1500 mm

Quick sizing: Sound pressure level at differential pressure 150 Pa

Nominal size	V	V	Air-regenerated noise	Air-regenerated noise	Air-regenerated noise	Air-regenerated noise	Case-radiated noise
Nominal size	V	V	①	②	③	④	①
Nominal size	V	V	LPA	LPA1	LPA1	LPA1	LPA2
Nominal size	l/s	m³/h	dB(A)	dB(A)	dB(A)	dB(A)	dB(A)
125	15	54	33	22	<15	<15	<15
125	40	144	39	29	22	19	20
125	70	252	46	37	31	29	26
125	100	360	49	40	34	32	31
160	25	90	40	28	20	16	20
160	75	270	45	35	29	26	25
160	125	450	49	41	36	33	29
160	175	630	50	42	37	34	32
200	40	144	40	31	23	20	20
200	125	450	46	37	31	30	26
200	210	756	48	41	36	35	30
200	300	1080	51	44	40	38	33
250	60	216	41	32	24	22	21
250	200	720	44	36	31	29	30
250	340	1224	47	40	35	34	36
250	475	1710	49	42	38	37	38
315	105	378	42	35	28	25	28
315	330	1188	45	40	33	31	35
315	555	1998	47	42	36	35	40
315	775	2790	50	44	39	38	43
400	170	612	43	36	30	26	30
400	545	1962	43	37	31	29	35
400	920	3312	45	40	34	33	39
400	1300	4680	48	42	37	35	43

① TVR-Ex

② TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 500 mm

③ TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 1000 mm

④ TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 1500 mm

VAV terminal units for variable and constant air volume systems in potentially explosive atmospheres, suitable for supply or extract air, available in 6 nominal sizes.

High control accuracy (even with upstream bend R = 1D).

Ready-to-commission unit which consists of the mechanical parts, the electronic control components, and parts for equipotential bonding and for use in potentially explosive atmospheres. Each unit contains an averaging differential pressure sensor for volume flow rate measurement and a damper blade.

Factory-assembled control components complete with wiring and tubing.

Differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)

Spigot with lip seal, for circular connecting ducts to EN 1506 or EN 13180.

Closed blade air leakage to EN 1751, class 4 (nominal sizes 125 and 160, class 3).

Casing air leakage to EN 1751, class C.

Special features

• ATEX mark and certification
• ATEX equipment group II, approved for use in zones 1 and 2; electronic control also for zones 21 and 22
• Volume flow rate can later be measured and adjusted on site; configuration is possible using personal computer software

Materials and surfaces

• Casing and inner tube made of galvanised sheet steel
• Control components made of die cast aluminium (pneumatic control: plastic)
• Plastic bearings
• Damper blade of stainless steel and with TPE seal (thermoplastic elastomer)
• Differential pressure sensor made of aluminium
• Air duct (inner tube) in stainless steel or powder-coated as options

Construction

• Galvanised sheet steel
• P1: Inner duct powder-coated, silver grey (RAL 7001)
• A2: Inner duct in stainless steel

Technical data

• Nominal sizes: 125 to 400 mm
• Volume flow rate range: 15 to 1680 l/s or 54 to 6048 m³/h
• Volume flow rate control range: approx. 15 – 100 % of the nominal volume flow rate
• Maximum differential pressure: 1000 Pa

Attachments

Variable volume flow control with electronic controller to switch a control signal and an actual value signal for integration into the central BMS.

• Supply voltage 24 V AC
• Supply voltage for actuator: 230 V AC
• Signal voltages 0 – 10 V DC
• The actual value signal relates to the nominal volume flow rate such that commissioning and subsequent adjustment are simplified
• Volume flow rate control range: approx. 15 – 100 % of the nominal volume flow rate
• Actuator with adjustable running time, 7.5 – 120 s