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20 Paul W. Donoho, R.E.H.S. #6227 (530) 701-9972 AdvanTexO O&M COMMERCIAL TREATMENT SYSTEMS Inspection 'o (continued) Inspection Points-Vent Fan Assembly 3.Leak inspection:Ono A Current sensor monitors the distribution valve is pressurized,inspect the the vent fan operation.It unions on the distribution the fan fails,this sensor valve for leaks.Tighten any } will open and activate unions that are leaking. an alarm.Some vent fan assemblies are equipped 4.Operation inspection: with optional heater units Open and close the ball valve for reliable performance in to test the operation of the cold weather, Checkyour distribution valve. system plans to determine it your vent fan assembly includes a heater. • When the valve is closed and opened,the flow should transition 1.Current sensor operation:To test the current sensor,switch off from one leg of the valve to anollner.Observe the clear section of the leg to verify this transition.There may be flow in more than the power to the fan and verify the visual alarm on the control panel one leg,but there should only be full flow in one leg at anytime. is activated. • When the ball valve is fully closed,the system will fully pressurize NOTE:TCOMcontrol panels have a 12-hourdelayin the audible (deadhead condition).Incorrectly installed connections in the line alarm for the current sensor may separate and require reinstallation before testing can be completed. 2.Optional heater unit:There are two types of heater unit controls • If the distribution valve does not rotate correctly,open the available for vent fan assemblies:a single set-point style and a distribution valve and inspect for debris or breakage.It the multiple set-point style.If your system is equipped with an optional problem is not a mechanical issue,review the plans for potential heater unit,check your system plans to determine the type of heater installation issues,including elevation. included in the vent fan assembly. Housekeeping • Single set point—bate the heater inside the vent fan assembly enclosure,remove the heater cover in the vent fan assembly,and 1 Verify that all control panels are turned on and all"AUTO-OFF-MAN" set the thermostat to 43°F(6°C). switches are toggled to"AUTO." • Multiple set points—In the control panel,set the"Heater On" 2.Close all control panels. point at 35°F(1.6°L7,"Heater Off"point to 45°F(7.2°C),"Fan On"point to 35°F(1.6°C),and"Fan Off"point to 25°F(-3A°C). 3.Close and bolt down all tank access lids and riser lids. Inspection Points—Distribution Valve WARNING:ANUN80LTED RlSERLIDOROPEN TANKISA SAFETMAZARD?Tank and riser access lids must be properly To verify that the distribution valve is operational,the valve must be secured at all times.if bolts are lost or damaged contactOrenco hydraulically loaded with the conditions under which it will operate.Use the immediately forreplacements. system plans to find the location of all distribution valves in the system. 4.Police the area for 1.Verily liquid level:Make sure that the tank or basin[hat you are debris and tools. e pumping from has sufficient liquid to perform the test. ' WARNING:There is no motor protection in TCOM panels and panels without"RO-alarms.Before running a pump,always verify that there is sufficient liquid in the tank or basin. 2.Tum on pump:Toggle the"AUTO-OFF-MAN"switch for the pump that pressurizes the distribution valve to"MAN." AIM-OM-ATX-3,nEv.�2.1,0.5115 •••Copyright Orenco Sys#ems®,Inc�Pmperly of Orenco Systems°°,IVc o nal reproduce or di; ule wlinout wrL;authorizHtion from Orenw'80044i W437