![]() ![]() In the case of grid tied systems where the batteries are kept at float voltage 24 hours/day it may be necessary to run the fan full time as the batteries are always gassing.Ī controller is usually used in the circuit to cycle the fan. The voltage set points for turning the fan on and off are above the full state of charge voltage of the battery but below the battery gassing voltage. Refer to the appropriate manual for hook up and programming instructions. Either an auxiliary relay in the Trace SW series inverter or a Solar Converters Simple Switch may be used. A controller is usually used in the circuit to cycle the fan. Place a 1 amp fuse (included) at the start of the positive circuit wire. Use 2" intake and 3" output PVC dwv pipe on 48 volt systems. Use 2" PVC dwv pipe on 12 and 24 volt systems. ![]() Put a screen on the outside pipe terminus to keep insects and debris out. Use no more than four 90° bends including one at the exterior terminus facing down. Place the POWER VENT higher than the top of the battery box and indoors, especially in cold climates. The POWER VENT must be placed vertically with the label right side up in order for the backdraft damper to function properly. The cost of an explosion proof rating is prohibitive. The fans are brushless dc motors using electronics to switch the fields without arcing. ![]() There is no explosion proof rating on the Power Vent. Is the Power Vent Explosion proof rated?Ī. combine two 24 volt Power Vents with 2" outputs into one 3" vent pipe using an inverted wye. You could combine the two exhausts into one larger vent. If you need to move more air you can use two vents, but each one must have its' own vent pipe. Can I stack two Power Vents in a row to move more air?Ī. The difference between the relay activation and deactivation. Two vents may be used for higher volume.Ĭomes in 3 voltages: 12, 24 and 48 Volts DC SPECIFICATIONSĪ. Systems larger than this can produce more hydrogen gas than the expel rate of the POWER VENT which operates in the 5 to 8 cubic foot per minute range. The POWER VENT is designed around typical home power systems with battery banks under 2,200 amp hours and charge rates under 150 dc amperes. Other systems require the addition of a voltage controlled switch. All TRACE SW model inverters have a programmable auxiliary relay which can operate the POWER VENT. A voltage sensitive switch is required in the system to make the on/off determination. When the batteries are "gassing" during charge periods the battery voltage will read above normal. The "fan on" mode is determined by the battery voltage. During these times the battery box is force vented with a low power, sparkless fan which overcomes the damper sending the gas outdoors. The POWER VENT alleviates this condition by keeping a gravity operated damper closed within the vent pipe except at times when the batteries are being charged and producing hydrogen gas. Quite often the NEC required venting was found back drafting, thus cooling the battery bank and lowering its' capacity as well as venting hydrogen gas into the structure. The concept arose from field experience of systems with enclosed battery boxes. The Zephyr POWER VENT was designed for use in remote home power systems.
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