The setup and configuration of an FP AHU is one of the most involved processes of the WEMS user interface, with a wealth of features available to fine-tune the control of the FP AHU.
The topics below cover how to set up and configure an FP AHU:
Physical (Requires WEMScontroller4)
Modbus
- Set Up An FP AHU For The First Time
- Configure An Existing FP AHU (DXFAU)
- Configure An Existing FP AHU (FAU Only)
- Configure An Existing FP AHU (Adiabatic)
The FP AHU icon
FP AHU Versus AHU
A standard AHU requires a WEMScontroller3 in order to modulate certain parts of the equipment via a 0–10V output. An FP AHU controls the AHU via relays (digital outputs) and analogue temperature monitoring. The setpoints used by an FP AHU differ from those used by a standard AHU.
FP AHUs do not provide any heating controls – their primary use is to keep the space temperature cool, hence their typical use in a telephone exchange environment.
FP AHU Control Strategy
An outline of the control strategy can be seen in FP AHU Control Strategy Basics.
For a more detailed breakdown of the FP AHU control strategy, see the document below.
FP AHU Control Strategy Advanced (opens in a new window)
647KB PDF