RECTANGULAR VAV DAMPER TECHNICAL CATALOGUE

Transcription

1 RECTANGULAR VAV DAPER ERVA TECHNICAL CATALOGUE

2 Rectangular VAV damper ERVA - Technical catalogue 2 KEY FEATURES Variable airflow Constant airflow Real-time airflow measurement with FläktGroup compact controller odbus version easily connected to the Building Automation System Available in IPSU compatible version RECTANGULAR VAV DAPER ERVA ERVA is a rectangular VAV damper for OPTIVENT system. It is used to control and regulate the supply air flow and the exhaust air flow. It can be used for many different purposes, for example to regulate the temperature and the air quality in a room. The damper can be used both for variable and constant flow and, if appropriate, forced shut-off for both the supply and exhaust air. All control equipment is installed on the apparatus casing. Standarly ERVA VAV damper is equipped with compact actuator FG 227V. Other controllers are available on request. Controller has limiting flow value V nom preset by manufacturer. FläktGroup compact controller 227V is a complete unit comprising of actuator, a dynamic differen tial pressure sensor for pressure-independent controls and user interface with 3-digit display which enables monitoring the air flow and setting up values of V max and V min without external equipment. For more information on the actuators see Optivent controls technical catalogues. ERVA is available also as an insulated version. Insulation material is glass wool with a thickness of 50 mm. SPECIFICATIONS Intended for air volume regulation Acoustically insulated or uninsulated Available in vast number of sizes PRODUCT CODE EXAPLE VAV damper ERVA VAV box equipped with FG 227V actuator width 25 and height 20 cm without insulation. QUICK SELECTION Flow range, l/s Height, cm Flow range, m 3 /h Width, cm The recommended air flow limits with compact controller 227V correspond to air velocity m/s.

3 Rectangular VAV damper ERVA - Technical catalogue 3 OPERATING RANGE OPERATING RANGE OF PARTICULAR CONTROLLER SIZES Following table shows recommended minimum V min [m 3 /h] and limiting V nom [m 3 /h] airflow value 1) preset by manufacturer. Width W (cm) Height H (cm) Width W (cm) Height H (cm) ) Other settings of V nom value on request. V max corresponds to air going through the VAV damper with velocity of 10 m/s. V min corresponds to air going through the VAV damper with velocity of 1.5 m/s. EASURING ACCURACY When air velocity is below 1.5 m/s measuring accuracies cannot be guaranteed. CHANGE OF OPERATION POINT Velocity m/s easuring accuracy % 1.5 ±14 4 ± 0 6 ±8 10 ±5

4 4 Rectangular VAV damper ERVA - Technical catalogue DIENSIONS AND WEIGHTS FLANGE JOINT WITHOUT INSULATION E = W FLANGE AND SLIP JOINT WITH INSULATION E = W H H1 = H W 475 W W1 = W + 76 D = W H H1 = H H H1 = H + 60 D = H W1 = W + 60 C = W + 82 SLIP JOINT WITHOUT INSULATION W W1 = W + 40 C = W Dimensions given in mm. WEIGHT (KG) WITHOUT INSULATION W (cm) H (cm) WEIGHT (KG) WITH INSULATION W (cm) H (cm)

5 Rectangular VAV damper ERVA - Technical catalogue 5 INSTALLATION GUIDELINES Due to accuracy of airflow control it is recommended to install ERVA VAV damper in a certain distance from other elements of ventilation VERTICAL system which may disturb the airflow pattern. Rules of controller s installation are shown below: HORIZONTAL 3H 2H H 1H 3W 2W W 1W WIRING DIAGRAS EXAPLES OF ERVA ELECTRIC CONNECTIONS WITH COPACT ACTUATOR GRUNER 227V PARALLEL CONTROL OF TWO DAPERS BU BN BK GY BU BN BK GY / V DC 24 V AC/DC ASTER-SLAVE CONTROL OF TWO DAPERS BU BN BK GY BU BN BK GY / V DC 24 V AC/DC NOTE! V min must be set to 0. V max must be set to V nom CAV CONSTANT AIR VOLUE FORCED CONTROL BU BN BK GY BU BN BK GY / V DC 24 V AC/DC NOTE! V max must be set to 0 the controller will have V min as setpoint. For more information and options see Optivent controls technical catalogues.

6 6 Rectangular VAV damper ERVA - Technical catalogue WIRING DIAGRAS EXAPLES OF ERVA ELECTRIC CONNECTIONS WITH COPACT ACTUATOR BELIO (L,N)V-D3-P PARALLEL CONTROL OF TWO DAPERS ASTER-SLAVE CONTROL OF TWO DAPERS CONTROL VIA P-BUS CAV CONSTANT AIR VOLUE

7 Rectangular VAV damper ERVA - Technical catalogue 7 ACOUSTIC DATA SOUND PRESSURE LEVEL IN ROO L p10a db(a) t (Pa) Face area velocity v (m/s) SOUND POWER LEVEL IN DUCT Correction Koct (db) iddle frequency (Hz) Tolerance ± Correction KA (db) ERVA face area (m 2 ) The sound power level in the duct for each octave band is obtained by adding the corrections Koct of octave bands and K A of the face area (see tables above) to the total sound pressure level L p10a, db(a), according to the following formula: L Woct = L p10a + K oct + K A Correction factor Koct is the average in the area of application of ERVA. SOUND POWER LEVEL EITTED TO SURROUNDING, CONTROLLER WITHOUT ACOUSTIC INSULATION ERVA-a L WA, db(a) ERVA-a L WA, db(a)

8 8 Rectangular VAV damper ERVA - Technical catalogue ERVA-a L WA, db(a) ERVA-a L WA, db(a) ERVA-a L WA, db(a) ERVA-a L WA, db(a) ERVA-a L WA, db(a)

9 Rectangular VAV damper ERVA - Technical catalogue 9 ERVA-a L WA, db(a) SOUND POWER LEVEL EITTED TO SURROUNDING, CONTROLLER WITH ACOUSTIC INSULATION ERVA-a L WA, db(a) ERVA-a L WA, db(a) ERVA-a L WA, db(a)

10 10 Rectangular VAV damper ERVA - Technical catalogue ERVA-a L WA, db(a) ERVA-a L WA, db(a) ERVA-a L WA, db(a) ERVA-a L WA, db(a)

11 Rectangular VAV damper ERVA - Technical catalogue 11 PRESSURE DROP PRODUCT CODE ERVA VAV DAPER (DAPER FULLY OPEN) VAV damper ERVA-a-bbb-ccc-d-e Δp, Pa v, m/s Actuator (a) 1 = Compact controller FG 227V 2 = Compact controller EBL 3 = Compact controller KNX 4 = Alternative controller (coding separately) 5 = Compact controller for odbus, 227V-B 6 = Compact controller for odbus, IPSU version 227V-B-ST Width (bbb) 020, 025, 030, 035, 040, 045, 050, 055, 060, 070, 080, 100, 120, 140, 160 Height (ccc) 020, 025, 030, 040, 050, 060, 070, 080, 100 SCHEATIC DIAGRA Joint type and casing insulation (d) 1 = Slip joint without insulation 2 = Flange joint without insulation 3 = Slip joint with insulation 4 = Flange joint with insulation Tightness class (e) 2 = Tightness class 2

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