System Testing And Maintenance; System Testing; Environmental Control Functions; Cooling - Emerson VERTIV Liebert Mini-Mate2 Series User Manual

Table of Contents

9.0

YSTEM

ESTING

This section describes system testing, maintenance and replacement procedures. Use copies of the

Maintenance Inspection Checklist on page 63 to record preventive maintenance inspections.

WARNING

Risk of electric shock. Can cause injury or death.

Open all local and remote electrical power disconnect switches before working within the

electrical enclosures.

Line side of the factory disconnect remains energized when factory disconnect is Off.

WARNING

Risk of high-speed moving parts. Can cause injury or death.

Open all local and remote electrical power disconnect switches and verify that fans/blowers

have stopped rotating before working inside the unit cabinet

9.1

System Testing

9.1.1

Environmental Control Functions

The performance of all control circuits can be tested by changing the setpoints, which actuates each of

the main functions.

9.1.2

Cooling

To test the cooling function, set the setpoint to a temperature of 10°F (5°C) below room temperature.

A call for cooling should register and prompt the equipment to begin cooling cycle. (Disregard any

temperature alarms). Upon completion of testing, return the setpoint to the desired temperature.

9.1.3

Heating

Reheat may be tested by setting the setpoint for 10°F (5°C) above room temperature. A call for

heating should register and prompt the equipment to begin heating cycle. (Disregard any

temperature alarms). Upon completion of testing, return the setpoint to the desired temperature.

9.1.4

Humidification

To check humidification, set the humidity setpoint at 10% RH above the room humidity reading. After

a short delay, the canister will fill with water and steam will be produced. Upon completion of testing,

return the humidity setpoint to the desired humidity.

9.1.5

Dehumidification

The dehumidification performance can be tested by setting the humidity setpoint at 10% RH below

room relative humidity. The compressor should turn on and the fan should switch to low speed. Upon

completion of testing, return the humidity setpoint to the desired humidity.

9.1.6

High-Temperature Sensor—Optional

The optional high-temperature sensor feature is a bi-metal operated sensing device with a closed

switch under normal conditions. Connected between pins 1-8 and 1-9, this device will shut down the

entire unit when the inlet air temperature exceeds a preset setpoint.

9.1.7

Smoke Sensor

While the smoke sensor is located in the unit, the power supply for the smoke sensor is located in the

electric panel. It constantly samples return air through a tube. No adjustments are required.

9.1.8

Remote Shutdown

A connection point is provided for remote shutdown devices supplied by the customer. This terminal

strip is on the printed circuit board. (Terminals TB1-4 and TB1-5 are fitted with a jumper when no

remote shutdown device is installed.)

AINTENANCE