Carrier 40VM Series Service Manual

Also see for 40VM Series: Installation and operating instructions Installation and operating instructions Installation and operating instructions Installation and operating instructions

Contents

11Fig. 18 —For Heat Recovery Outdoor UnitTable 9 —List of 500P EEV Valve Opening in Heating ModeStart and Stop Control of 2000P EEVWhen the indoor unit receives any of the following signal:• Signal to turn off• Indoor unit error signal• Indoor unit turns to thermo-offThe EEV’s control uses the following logic:• If the outdoor unit shuts down without heating capacity requirement:The EEVs keep the previous opening for three minutes. Then all EEVs conduct 1200P opening (EEVs whose opening is notequal to zero will close to 0P first, and then open to 1200P).• If the heating capacity requirement of the outdoor unit is not equal to 0:The EEVs keep the previous opening for 25 seconds after the indoor unit turns off, and then close to -40P to reset the openingand open to 224P (Standby).When the indoor unit receives the signal to turn on, the EEV’s control uses the following logic:Fig. 19 —For Heat Pump CapacityFig. 20 —For Heat Recovery Outdoor UnitCAPACITYINDEXINITIAL OPENING MINIMUM OPENING MAXIMUM OPENINGHEAT PUMP ANDSINGLE PHASE VRF HEAT RECOVERY HEAT PUMP ANDSINGLE PHASE VRF HEAT RECOVERY HEAT PUMP ANDSINGLE PHASE VRF HEAT RECOVERY7~24 400 330 144 120 480 48030~54 400 330 200 160 480 480All theStartup signal indoor unitsopen to OP Heat Recovery UnitCompressor starts 200 sPc 362psiPc - Pe 123psiT2a 89.6°FReset, then open OPCapacityrequirement = 0Capacityrequirement = 0First open to 120P for oneminute, and then open toinitial opening for 4minutesAll theindoor unitsopen to 24PCompressor starts > 200sPc > 362 psiPc-Pe > 123 psiT2a > 89.6°FHeat Pump VRFSingle Phase VRFCapacityrequirement = 0Capacityrequirement = 0Startup Signal224P standby openingFirst open to max. openingfor one minute, and thenopen to initial opening for4 minutesAll theStartup signal indoor unitsopen to OP Heat Recovery UnitCompressor starts 200 sPc 362psiPc - Pe 123psiT2a 89.6°FReset, then open OPCapacityrequirement = 0Capacityrequirement = 0First open to 120P for oneminute, and then open toinitial opening for 4minutes