Stimmen - 2, Durchschnittliche Bewertung: 5 ( )

Hersteller: Venmar Dateigröße: 1.64 mb Dateiname: Unterrichtssprache:

The connection from the ventilator to the control is low voltage and requires a 4 conductor (24 ga. minimum) LVT cable. Models are available with either a dehumidistat control or gas sensor. The following four options are available. Slide Switch Type Dehumidistat to engage high speed exchange. Slide switch operation supporting continuous low exchange and continuous high exchange. Push Button Electronic Type Dehumidistat to engage high speed exchange. Push-button operation supporting: intermittent (stand-by) ventilation, continuous low exchange, continuous high exchange, maintenance indicator light and exchange indicator light. Pool Electronic Type Ideal for pool dehumidification. Dehumidistat to engage high speed exchange. Push-button operation supporting: intermittent (stand-by) ventilation, continuous low exchange, continuous high exchange, maintenance indicator light and exchange indicator light. Pollutant Detector Type Pollutant monitor to engage low/high exchange. Push-button operation supporting: intermittent (stand-by) ventilation, continuous low exchange, continuous high exchange, maintenance indicator light and exchange indicator light. 4 Airflow Measurement and Balancing Once installation is complete, the supply and exhaust airflows should be balanced. This will ensure proper operation and a good quality installation. A well designed duct system with properly sized duct runs and equal static pressure losses of both the supply and exhaust will aid in balancing the unit. However, it will be necessary to take flow measurements with the proper equipment to ensure a balanced system. Magnehelic gauges and Flow Measuring Stations (FMS) are available for 14" x 8" (356 x 203mm) or 20" x 8" (508 x 203mm) rectangular duct and a range of round duct sizes. Please ask your supplier for more information. 4.1 Flow Station Positions Whether flow stations are permanently installed or used temporarily, the position they are placed in is very important to ensure accuracy as shown in Appendix C. The best locations for mounting the FMS is in the long straight sections of ducting where airflow has stabilized across the area of the duct. This position will provide the most accurate measurements. The next best location for the FMS is immediately before or after a 90 degree elbow and 12" (305mm) from any damper. In straight sections of pipe, the FMS should be installed at least 30" (762mm) from any fan outlet. This applies to the "Supply Air Opening" connection on the heat recovery ventilator and the "Exhaust Air Opening" connection. With airflow measuring stations permanently installed, balancing is done by measuring airflow on one side of the heat recovery ventilator and then the other. Adjustments can then be made to the damper to equalize airflows. When using the temporary method, an FMS is installed in one air duct of the heat recovery ventilator and the flow recorded. The FMS is then relocated to the other air duct and the airflow is recorded again. Dampers can then be adjusted to equalize airflow. This procedure should be repeated to ensure that the unit is balanced properly. Page 6 4.2 Balancing Procedure Before proceeding with balancing, all windows, overhead doors and walk-in doors should be closed and exhaust systems should be turned off. The connections between the flow stations and the ducts must be sealed with tape. Mount the magnehelic gauge in a convenient location where it is level and will not vibrate or be bumped. Zero the gauge. Measure the exhaust air first as it is often the lowest due to a longer duct system. With the fan speed at maximum, connect the hoses from the FMS to the magnehelic gauge. If the needle falls below zero, reverse the hose connections. Ensure that the damper is wide open. Take a reading from the magnehelic gauge and record it. Remove the FMS and place it in the supply duct. This process is not necessary if the FMS is to be permanently mounted. Repeat the procedure. If the reading is higher in the supply duct, adjust the damper until the reading is the same. If the reading is lower, return the FMS to the exhaust duct and adjust the damper to obtain the same reading as the supply duct. 5 Maintenance and Service 5.1 Bi-Monthly Maintenance WARNING Disconnect power before maintaining unit. Bi-monthly maintenance should include: Air Filters The standard foam filters are washable. Under normal conditions it is recommended that they be cleaned every two months. More frequent cleaning may be required under extremely dirty operating conditions. Use a vacuum cleaner to remove the heaviest portion of accumulated dirt, then wash with warm water. A medium efficiency filter for the supply air stream is available from your supplier. This filter is disposable and should be replaced when it becomes dirty. 1 1 VL0001 2 600 cfm and 1200 cfm 1. 2. Washable foam filter MEF filter - optional 1 or 2 1 VL0002A 700 cfm Drain Pans and Interior of Unit With the filters removed from the unit, the foil faced i...

Herunterladen

Geben Sie zwei Ziffern: