Laars JVS Installation And Operation Instructions Manual

Laars JVS Installation And Operation Instructions Manual Manual pdf 13 page image

Mini-Therm II Hydronic Boiler Page 13Figure 6. Typical Plumbing Installations.JVFromSystemToSystemNON-LOW TEMPERATURE SYSTEMS(120°F+ Return Temps)Simple Primary/Secondary Piping - Hydronic - Not Low TempNOTE: All closed loop systems should include air elimination, expansion tank and feed water inlet. Place at point of lowest pressure (typicallyat the inlet of pump).NOTE: Ball valves should not be used as balancing valves. Only use for shutoff apps.LOW TEMP SYSTEMSJV120°+FromSystemToSystemPrimary/Secondary Piping with Variable Speed InjectionVariable SpeedControlPumpPumpIsolation ValveIsolationValveThe preferred piping configuration for JV boilers is always using primary/secondary piping.There are some applications that are acceptable without primary/secondary piping, see below.FromSystemToSystemPrimary/Secondary Piping with Field Balancing(for Fixed Low Return Temperatures)JVPumpIsolation ValveIsolationValveBalancingValveBalancingValvePumpFromSystemToSystemTempering Valve with System Loopand Boiler Loop PumpJVPumpIsolation ValveIsolationValveTemperingValvePumpFromSystemToSystemPrimary/SecondarySystem Loop with Tempering Valve and Pump with Boiler Loopwith Tempering Valve and PumpJVPumpIsolation ValveIsolationValveTemperingValvePumpTemperingValveIsolationValveIsolationValvePumpPumpJVFromSystemToSystemPrimary/Secondary Piping with By-Pass(for Fixed Low Return Temperatures)PumpIsolationValvePumpIsolationValveBalancingValveBalancingValvePrimary/Secondary Piping with Automatic By-PassPumpPump IsolationValveIsolationValveAutoBy-PassValveFromSystemToSystemJVJVFromSystemToSystemPrimary/Secondary Piping with LaarsThermostatic Union as an Automatic BypassPumpIsolationValvePumpIsolationValveLaarsThermostaticUnionPN 2400-030BalancingValve