| BT 1&2 |
Bubbler Tube - Used in conjunction with the LCP/ECP to pneumatically sense solution level |
| FM |
Flow Meter- Measures and controls the transfer of concentrated solution from the regenerator to the conditioner |
| HT |
Enthalpy Transmitter – Provides temperature & humidity signals to the PLC in LCP/ECP 1 for summer/winter mode operation |
| KV2 |
Solution Return Valve – Regulates the amount of energy transfer during the Null Cycle |
| KV3 |
Turn-down Set-point Valve – During off peak operation this valve is used to regulate energy transfer |
| LCP/ECP 1 |
Level & Electrical Control Panel 1 (PLC) - Provides:- High level, low level alarms- Modulating control of V6 based on TT leaving air set-point (Winter Mode)
- Switches between summer and winter mode based on signal from HT
- Modulates KV2 & KV3 during Null Cycle
- Motor starters & contactors |
| TT |
Temperature Transmitter - Senses leaving air temperature and transmits the signal to the PLC in LCP/ECP1 for V6 modulation control to maintain set-point |
| V5 |
Water Make-Up Valve- Receives a on/off signal from the PLC in ECP/LCP 2 based on BT 2 low level set-point |
| V6 |
Heater Valve- Receives a modulating signal from the PLC in ECP/LCP 1 to maintain TT set-point in winter operation |
| LCP/ECP 2 |
Level & Electrical Control Panel 2 - Provides:- High level, low level alarms- Modulating control of V5 based on BT2 level sensing in winter mode
- Motor starters & contactors |
