Carrier 19PV550 Installation, Operation And Maintenance Instructions

Also see for 19PV550: Control manual

Carrier 19PV550 Installation, Operation And Maintenance Instructions Manual pdf 17 page image

176 - APPLICATION DATA6.1 - Operating limits for 19PV units19PV Minimum MaximumEvaporatorEntering temperature at start-up °C - 35Leaving temperature during operation °C 3,3 20Entering/leaving water temperature difference K 3 11,1CondenserEntering temperature at start-up °C 13(1) -Leaving temperature during operation °C 14(1) 50Entering/leaving water temperature difference K 3 11,1(1) For lower condenser temperatures a water flow control valve must be used atthe condenser (two or three-way valve). Please refer to Control for option 152to ensure the correct condensing temperature.Note: Ambient temperatures: These units are dedicated for indoor environment. Theexternal temperature at chiller start up should be at least 5°C. For such lowambient, option 152 is recommended. During storage and transport of the 19PVunits (including by container) the minimum and maximum permissibletemperatures are -20°C and 66 °C.Evaporator leaving water temperature, °CCondenser leaving watertemperature, °C10203040500 5 10 15 206.2 - Minimum chilled water flowThe minimum chilled water flow is shown in the table in chapter 6.7.If the system flow is less than the minimum unit flow rate, theevaporator flow can be recirculated, as shown in the diagram.For minimum chilled water flow rate121Legend1. Evaporator2. Recirculation6.3 - Maximum chilled water flowThe maximum chilled water flow is limited by the permitted pressuredrop in the evaporator. It is provided in the table in chapter 6.6- Select the option 100C that will allow a higher maximum waterflow rate (see the option 100C in the table in chapter 6.5).- Bypass the evaporator as shown in the diagram to obtain alower evaporator flow rate.For maximum chilled water flow rate12Legend1. Evaporator2. Bypass6.4 - Condenser water flow rateThe minimum and maximum condenser water flow rates are shownin the table in chapter 6.6If the system flow is higher than the maximum unit flow rate, selectthe option 102C that will allow a higher maximum water flow rate.Please refer to option 102C in the table in chapter 6.5.