valutazioni - 2, GPA: 4
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Facilità d'uso
System design will dictate the feasibility of this. Natural convection losses and the entry of air into tanks are eliminated by connection to the side or underside of main pipe. The piping should be pitched up and away from the EXTROL® to eliminate any potential air traps. Installation THIS PRODUCT MUST BE INSTALLED BY A QUALIFIED PROFESSIONAL. 1. Note location of system connection, air charge valve and drain connection on tank. 2. Remove the plug or pipe cap from the system connection. 3. Remove the 1 1/2” NPT plug covering the air charge valve. 4. Before making any connection to the tank, check the tank and air charge (use an accurate pressure gauge). The air pressure must be equal to the minimum system pressure at the tank location. 5. After making sure the air charge is correct, replace the 1 1/2” plug over the air valve. 6. The EXTROL® may now be piped to the system (use the suggested EXTROL® piping diagrams on the next page). 7. Using the table below, select appropriate pipe size. Connection to each EXTROL® must have a lock shield gate valve and union to allow isolation and removal if required. Make up and fill valves, whether manual or automatic, should be tied into the connecting line. This will ensure that pump operation will not affect valve operation. Operational Limits Maximum Operating Pressure: As stamped on nameplate Maximum Operating Temperature: 240 °F Minimum Operating Temperature: 35°F (non-glycol application) If unit is being installed in a glycol system where minimum temperatures fall below 35°F, contact the AMTROL technical service department at (401) 535-1216. Operating Instructions 1. Check the expansion tank pre-charge before the system is filled with water. The charge is 12 psig unless noted otherwise on the tank label. Check to make sure this is the correct pre-charge pressure specified for the system. 2. If the tank pre-charge pressure needs to be changed on a dry system follow the following procedure: a. Check the expansion tank air pressures at the pre-charge connection with an accurate tire type pressure gauge. The pre-charge connection is the same kind of connection found on automobile tires. b. If the pressure is low, charge the tank with nitrogen gas or with oil free compressed air. Check the pressure frequently during this process as you would when filling a tire with air. Danger: Excessive pressure can cause tank to explode. Exercise care when filling a tank with air so the pressure does not exceed that required or does not exceed the working pressure of the tank as stamped on the nameplate. Failure to follow these instructions will result in serious personal injury or death and property damage. 3. If, after the system has been filled with water and operating, it is found that the expansion tank pre-charge must be changed use the following procedure: a. Turn off the heat source and allow the system water to cool to ambient temperature. b. Close the lock-shield valve in the tank-to-system piping. IMPORTANT: Expa...
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