Control of energy recovery system
Start-up
On initial start-up, after after power failure, the energy recovery system will (after a delay, defined by parameter SYS-01) be enabled before the energy recovery assumes normal control.
Description |
Default value |
SYS-01: start-up delay |
5 sec |
Control of energy recovery system
The module can work in several configurations. In a typical sequencing application the module receives an energy recovery control signal (ERCCtrlSig) from the control strategy module. The energy recovery output signal with minimum and maximum limitation values, defined by parameters ERS-01 and ERS-02, will command the valve as shown in the next figure.
Description |
Default value |
ERS-01: minimum energy recovery control signal |
0 % |
ERS-02: maximum energy recovery control signal |
100 % |
The "EnRecTemp" sensor is mounted in the liquid system to maintain a minimum liquid temperature for freeze protection. The setpoint of the liquid temperature will be calculated against the outside air temperature, defined by parameters OAT-01 and OAT-02. The minimum and maximum values of the setpoint are limited by parameters ERT-01 and ERT-02, as shown in the next figure.
For display purpose of the calculated setpoint is parameter DISP-01 available.
Description |
Default value |
ERT-01: energy recovery temperature low setpoint |
10 °C |
ERT-02: energy recovery temperature high setpoint |
15 °C |
OAT-01: outside air temperature minimum value |
-10 °C |
OAT-02: outside air temperature maximum value |
10 °C |
This module calculates the actuator position as shown in the next figure.
Description |
Default value |
ERT-03: P-band energy recovery temperature control |
10 K |
ERS-01: minimum energy recovery control signal |
0 % |
ERS-02: maximum energy recovery control signal |
100 % |