AV-670:B-32 10/1/09 2:20 PM Page 1 Bulletin AV-670 Series 670 Hood Monitor Specifications - Installation and Operating Instructions DWYER INSTRUMENTS, INC. Phone: 219/879-8000 www.dwyer-inst.com P.O. BOX 373 • MICHIGAN CITY, IN 46361, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.
AV-670:B-32 10/1/09 2:20 PM Page 2 Operator Display Panel Built-in AIRFLOW SENSOR LED indicators Function buttons Calibration.
AV-670:B-32 10/1/09 2:20 PM Page 3 1.67 1.67 [42.55] [42.55] 0.16 [4] 4.96 [126] 4.65 [118] 0.16 [4] 2 x FIXING HOLES 2.5 mm DIAMETER FOR 2 x No. 4 SELF TAPPING SCREWS PROVIDED 3.35 [85] MOUNTING BRACKET PANEL CUTOUT DIMENSIONS 4.65˝ x 3.35˝ [118 mm x 85 mm] 2-1/64 [51.05] 13/64 [5.08] 1-1/16 [27.10] 3-29/64 [87.88] 3-17/64 [83.06] AIR VELOCITY MONITOR 4-9/16 [116.08] 5-45/64 [145.03] SAFE ENTER 4-61/64 [125.98] ALARM SET SERIES 670 www.dwyer-inst.
AV-670:B-32 10/1/09 2:20 PM Page 4 SPECIFICATIONS Service: Fume hood face velocity air flow. Alarm Range: 30-400 FPM (0.15-2.0 m/s). Alarm Indication: Red LED & audible alarm. Low Air Velocity Alarm Delay: Fixed 5 secs. Display: Visual LEDs: Red: Alarm. Green: Normal. Horn Silence: Yes-temporary and permanent. Accuracy: Face velocity ±10%. Operating Temperature: 55-86°F (13-30°C). Storage Temperature: -40 to 150°F (-40 to 65°C).
AV-670:B-32 10/1/09 2:20 PM Page 5 4.0 Fume Hood Installation 670 100mm 100mm N o rm a l S as h w o r k in g h e ig h t . e g . 5 0 0m m 25mm Female adapter 25mm Male bush 670 Face Open to the laboratory 25mm Tube Fume cupboard inner skin Fume cupboard outer skin It is very important to position the Series 670 airflow sensor in the correct position to give long term stable reading of the face velocity. Please read the INSTALLATION NOTES below and if in doubt contact us for further advice.
AV-670:B-32 10/1/09 2:20 PM Page 6 Standard Installation Installation using Duct Connection When using the Duct Connection method the 1/4˝ connection tube acts as a flow restrictor (due to the higher pressure in the duct). Use a 6 ft tube for pressures below 0.4 in w.c.
AV-670:B-32 10/1/09 2:20 PM Page 7 Wiring Diagram Relay output Rated 250V 5A AC1 2 Note: The Sash High alarm can operate with the Micro Switch OR the Proximity Switch. Both connection points are available as standard.
AV-670:B-32 10/1/09 2:20 PM Page 8 External Electrical Connections - The alarm unit will have the following connection points: Input 1 - Volt free relay input - (close contact to activate the input). This input is configured as: NIGHT SETBACK Output R1 - Volt free relay output - (contact closes on activation). This input is configured as: LOW AIR ALARM Sash High Input - a. Connection point for Sash High micro switch. (Switch contact to close and remain closed in Sash High condition). b.
AV-670:B-32 10/1/09 2:20 PM Page 9 1.1 General Description All systems comprise of the following components : 1 - 670 Alarm unit 1 - AC power supply 1 - 24˝ tubing 1 - IOM 1 - Vent kit 1 - Mounting bracket w/screws Operator Features - the alarm has the following operator features : Safe LED - Green LED (Not flashing) will be displayed if the airflow is greater than the Low air alarm point. Alarm LED - Red LED (Not flashing) will be displayed if the airflow is lower than the Low air alarm point.
AV-670:B-32 10/1/09 2:20 PM Page 10 1.2 Alarm Configuration/Calibration The alarm is supplied with a factory configuration. The only part of the configuration that can be changed is the setting for the Sash High timer delay and the percentage figure for the Low Air alarm point when using the two point calibration mode. The alarm has two modes for the calibration of the airflow alarm point. These two modes are selectable via a ‘jumper connection’ on the back of the alarm PCB.
AV-670:B-32 10/1/09 2:20 PM Page 11 1.3 Start up When unit is powered up the following sequence of events occur: 1. The 12V DC power is applied to the airflow sensor and the alarm then performs a self test on the functions, LEDs and audible alarm (approx 2 sec) and then initiates a delay timer to allow the airflow sensor to stabilize. 2. During the whole of the delay period all alarms and relay outputs are inhibited and the Red & Green LEDs will be permanently ON. 3.
AV-670:B-32 10/1/09 2:20 PM Page 12 1.4 Events / actions Safe airflow • Airflow above alarm level (eg > 80 fpm). • Green LED on. Low airflow • Airflow below alarm level for longer than the low air delay time (5 secs). • Red LED on (Not flashing). • Audible alarm sounds (Beep’ on/off every 1 sec) - can be muted via Enter pushbutton. • Low air relay R1 operates.
AV-670:B-32 10/1/09 2:20 PM Page 13 2.1 Quick Start Installation Follow the instructions below for installing and commissioning the unit: Before connecting the unit it is important to decide on the type of calibration that is to be used on the installation. The two methods are described in section 1.2 Alarm Configuration/Calibration. 1. Fit the alarm to the Fume Hood using the cut-out details provided with the unit. 2.
AV-670:B-32 10/1/09 2:20 PM Page 14 Calibration continued: Two Point Calibration (with CAL jumper on PCB not connected). a. Open the Sash to the normal operating height and adjust the face velocity to the normal operating value using a calibrated instrument to check the value. b. Press and hold the Enter button for 5 secs to go into the Calibration mode. This is indicated by both Red and Green LEDS flashing on/off together with the audible alarm sounding (‘Beep’ on/off 4 times every 1 sec). c.
AV-670:B-32 10/1/09 2:20 PM Page 15 2.2 Calibration Notes: 1. The two calibration methods are intended to give the installer two options for calibrating the alarm. 2. Using the Alarm Point Capture method it is necessary to adjust the face velocity on the fume hood using a mechanical damper (or fan speed control if available) to the desired alarm point and this is sampled by the unit. It is then necessary to re-adjust the face velocity back to the normal operating value.
AV-670:B-32 10/1/09 2:20 PM Page 16 MAINTENANCE Upon final installation of the Series 670 Hood Monitor, no routine maintenance is required. The Series 670 is not field serviceable and should be returned if repair is needed (field repair should not be attempted and may void warranty). Be sure to include a brief description of the problem plus any relevant application notes. Contact customer service to receive a return goods authorization number before shipping. ©Copyright 2009 Dwyer Instruments, Inc.
