Electronic Climate Control; How It Works - Intellitec ELECTROINC CLIMATE CONTROL Service Manual

ELECTRONIC CLIMATE CONTROL

HOW IT WORKS

The System contains two major components, the ECC Thermostat and the ECC Control Module, along with
additional external sensors which are connected to these modules.
THE ECC THERMOSTAT:
The Thermostat allows the owner to set the front and rear air conditioning and heating systems' modes and
temperatures. The electronics in this panel measure ambient temperatures via two external temperature
probes (front and rear). Based on the mode and set point temperature settings, the probes send appropriate
control signals to the ECC Control Module. These signals are sent via a two wire multiplexed communication
link labelled IPX SIG and IPX GND.
There are two identical sets of controls on the panel, one for each of the front and rear systems. The potenti-
ometers allow the user to select a desired temperature for each system in the range of 50 to 90 degrees
Fahrenheit. Moving the controls down, lowers the set point temperature. The two seven-position function
switches are used to select the furnace's and air conditioners' operating modes. A brief description of each
mode is as follows:
HEAT - The Thermostat controls the furnace/s to maintain the desired temperature in the coach. The
furnace/s will be energized at an ambient temperature 2 degrees below the set point tempera
ture and shut off when the ambient temperature is at the set point temperature.
Load shedding is not active in this mode.
OFF - All control settings are disabled and the Thermostat is placed in a low current "sleep"
mode in order to minimize battery drain. (35-45 mA)
LOW FAN - The air conditioner fan is energized on low speed. Load shedding is active.
INTELLITEC
131 EISENHOWER LANE NORTH
LOMBARD, ILLINOIS 60148-5413
630-268-0010 / 1-800-251-2408
2 53-22130A100