Connecting the Air Ambient to the Air conditioning Unit
Can we make a saving?
The first stage is to gather information on the type of HVAC or AC system (Make, Model) and to review the client’s usage of the unit onsite.
- Is it a type of HVAC/AC we can control or make a saving from?
- Is it strictly run during operation hours or left to run outside hours?
- Is it set to too low a temperature (i.e. 18 Degrees C) or adequate (i.e. 23 Degrees C)?
- Is there other room for improvement (I.e. do we need all AC on at the same time or set in stages or rotation?).
Can we connect to it?
The Air Ambient does not connect to the outside units or compressors directly, instead to control the system we need to remove its temperature sensor (located within the room it is cooling/heating) and connect the Ambient to it instead.
This means looking inside the building for the Thermostat or the ACs remote/wall control unit and finding out the make/model.
Or the indoor AHU (i.e. evaporator, etc) for Make/Model details.
We need to know the Make and model of these units so we can check if the sensor is accessible and analog (variable resistance thermister). If you are unable to find datasheets or information, you might need to open them to inspect (There is a diagram inside the unit with the details).
How to connect to the Indoor unit?
When it comes time to install the Ambient or pre-inspect, we need to remove the outer cover of the indoor units and look for its Control board and diagram within. From here look for the room/air/ return sensor.
Example 1: In this example, the sensor is labeled as Thermistor (Return Air) and is linked to connector CNH BK on the control board.
Example 2: For this one there are thermistors for return air and heat exchanger, we want the return air, linked to connector CNH Bk on the control board.
Example 3: For this one there are thermistors listed for the coil and air, we want the air, linked to connector X16A on the control board.
Example1: white connector
Example 2: Red connector
We next locate this connector on the Control board, the above 2 pictures illustrate sensor positions in two examples.
From the control board, we can then follow the wire to find the sensor to determine our resistance values (please refer to the manual) for setting up the Air Ambient.
Measure the resitance
Determine the type and values.
Splice into the exisiting wire and connect in the Air Ambient, but leave the original sensor available to reconneced at anytime for servicing.