Energy Recovery; Rotational Heat Exchanger (Rothexg21Y) - Siemens Climatix S300 HRV Application Manual

5.9 Energy Recovery

5.9.1 Rotational Heat Exchanger (RotHExg21y)

Available parameters
A6V10733786_en_c
The purpose of energy recovery is to absorb heat/cold from the exhaust air and
transfer it back to the supply air side. Energy recovery is usually used as the first
heating/cooling element. The control of the energy recovery can be advantageous
in the off-season depending on the required supply air temperature. Depending on
the setting and temperature conditions, the energy recovery unit can also be
selected so that it is only used for heating or for heating and cooling.
ERC is an active element that uses 0..10 V signal for wheel speed control. To limit
the PI control of the acceleration and deceleration of the ERC speed too slow or
too fast, the ramp-up/ ramp-down time can be set.
When configured, the bypass damper is automatically used to reduce the system
pressure differential at times when ERC is off (< 1% speed). The delay time to
activate the bypass after ERC is 1 min (fixed).
Current values
ERC speed
Prio2: Fire / Smoke
Prio5: Protection
External fault detection for ERC
Bypass damper
Prio2: Fire / Smoke
Prio5: Protection
Setpoint supply air temperature for heating
Setpoint supply air temperature for cooling
Heat exchanger heating / cooling state
Prio 8, 13: manual override
Prio 15: automatic change
Basic settings
Minimum ERC speed
Special settings
Ramp up/down time, ERC speed
ERC Kp
Application functionalities
Energy Recovery
BACnet object R/RW
RotHExgSpd RW
AO,106 (A1)
AO,115 (A2)
AO,124 (A3)
AO,133 (A4)
AVAL,385 (POS9)
AVAL,474 (AO1)
AVAL,481 (AO2)
RotHExgFlt R
BI,110 (X3)
BI,127 (X8)
BI,76 (D1)
BI,93 (D2)
HExgDmpBypCmd RW
BO,55 (Q1)
BO,70 (Q2)
BO,85 (Q3)
BVAL,246 (POS9)
SpTSuHHExg R
AVAL,159
SpTSuCHExg R
AVAL,160
HExgEcmSta RW
BVAL,181
BACnet object R/RW
RotHExgSpdMin RW
AVAL,162
BACnet object R/RW
TiRmpRotHExg RW
PINTVAL,83
GainHExgCtr RW
AVAL,165
5
Note
%
%
°C
°C
0: Heating
1: Cooling
Note
%
Note
s
%/K
91 | 170