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General| Model | RTAA-340 |
|---|---|
| Type | Air-Cooled Chiller |
| Cooling Capacity | 340 tons |
| Refrigerant | R-134A |
| Voltage | 460V |
| Sound Level | 85 dBA |
| Power Supply | 460V/3/60Hz |
Outlines the general tasks and responsibilities of the contractor during unit installation.
Requirements for a rigid, non-warping mounting pad or concrete foundation to support unit operating weight.
Step-by-step guide for safely lifting the unit using provided lifting plates and appropriate equipment.
Measures to protect the chilled water system from freezing at subfreezing ambient temperatures.
Steps to protect the domestic water heater and associated piping from freezing during cold ambient conditions.
Details system configurations, elevation, and distance affecting refrigerant and oil charges and line sizing.
Procedure and tables for sizing liquid lines based on equivalent length and circuit capacity.
Procedure and tables for sizing suction lines, considering horizontal, upflow, and downflow sections.
Process for determining the approximate refrigerant charge required for the system.
Method for calculating the amount of additional oil required based on refrigerant added for field piping.
Adherence to wiring diagrams, local codes, NEC, and specific cautions for electrical installations.
Requirements for sizing and selecting power supply wiring according to NEC and project engineer specifications.
Wiring recommendations for chilled water pump interlock and external auto/stop functions for unit control.
Procedure for connecting remote resistor/potentiometer for external current limit setpoint adjustment.
Procedures for flushing water piping, connecting chilled water lines, and installing gauges and strainers.
Steps for connecting unit power supply, control power, and other necessary wiring with safety precautions.
Explains the refrigeration cycle, including compression, condensation, and evaporation processes.
Explains how the UCM manages compressor starts, loads, and unloads to balance operation.
Instructions on using display keys to select and adjust variables, options, and setpoints within menus.
Configuration options for external controls, ice making, reset functions, and circuit lockout.
How the UCM monitors evaporator water temperatures to detect loss of water flow and initiate shutdowns.
How the UCM monitors compressor current to protect against overcurrent or locked rotor conditions.
Pre-start procedures to verify correct wiring, connections, valve positions, and power supply.
Steps for taking the unit out of service for an extended period, including draining and protection measures.
