Conviron BDR16, Руководство пользователя

Страница: 17 / 35

Start Up
October 2018 | 287849-ENG, R00 15
4
START UP
Once the cabinet is assembled, leveled, and all connections have been made, the cabinet can be
powered on. Verify that the cabinet is operating properly before introducing any research material.
4.1 Power ON
Before powering on the system:

Ensure all mechanical, fluid, and electrical connections are secure.

Ensure all local, municipal, and facility inspections are complete.

Ensure no service personnel are performing work on the cabinet.
All chambers using a direct expansion (DX) refrigeration system are equipped with scroll
compressors with crankcase heaters. Crankcase heaters help avoid compressor damage caused
by condensation of refrigerant in the compressor crankcase when the unit is off.
4.1.1 Starting a Chamber with DX Systems
Perform these checks before starting the chamber.
4.1.1.1 Before Starting the Unit
1. Check that the proper electrical power is connected to the main terminals, identified
with the MAIN SERVICE CONNECTION label. See Figure 3-2: Wiring Connection
Order on page 14.
2. Ensure that all breakers are ON.
It is critical that the crankcase heater be allowed to run for a minimum of two hours
before running a program and powering ON the compressor.
The crankcase heater is active whenever the main disconnect switch is turned to ON
and the chamber is not running.