Service manual

Indoor Unit Functional Concept ESIE04-01

2–26 Part 2 – Functional Description

2.2 Thermostat Control

Purpose Based on the information received from the air return sensor, the thermostat control will decide the

required operation status of the system.

Thermostat control Cooling mode:

Heating mode:

Cool / heat changeover in automatic mode:

Preventing

thermostat OFF

conditions

The thermostat control prevents the thermostat from turning OFF in the following conditions:

P Initial operation for the first 2.5 minutes, or

P Defrosting, or

P Forced operating mode

Remark: The thermostat control will be changed when using field settings for low humidity applications, setting

16(26)-2-03 & 16(26)-2-04.

See "Part 4–Commissioning and Test Run" for details.

Thermostat OFF

–0.5 K

Set point

+1 K

Thermostat ON

–1 K

Set point

+0.5 K

Thermostat OFF

Automatic heating

–2 K

Set point

+2 K

Automatic cooling

RZQ - Final.book Page 26 Monday, September 20, 2004 11:24 AM