Handleiding
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EWWQ090G ÷ EWWQ720L - R410a - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410a - Condenser less
EWHQ100G ÷ EWHQ400G - R410a - Heat pump scroll chillers
EWAQ- - R410a - Air-cooled scroll chillers
EWAQ-G - R410a - Air-cooled scroll chillers
EWYQ- - R410a - Air-cooled scroll heat pumps
Air and Water cooled scroll chillers & heat pump
Operation
Manual
Operation Manual
40
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
heat pump
D-EOMHW00106-15EN
2. A compressor can stop only if since the last start-up or shut-down of any other compressor
the Stage Dn Delay has expired.
3. A compressor can start only if since its previous start-up the Start to Start Delay has
expired
4. A compressor can start only if since its previous stop the Stop to Start Delay has expired
The unit capacity remains constant if the controlled temperature is within the interval:
[ Setpoint - Stage Up DT ÷ Setpoint + Stage Down DT ]
The following table summarize the conditions for compressors start and shut down explained
above.
Cool Mode
Heat Mode
First Compressor Start
Controlled Temperature > Setpoint + Start Up DT
Controlled Temperature < Setpoint - Start Up DT
Other Compressor Start
Controlled Temperature > Setpoint + Stage Up DT
Controlled Temperature < Setpoint - Stage Up DT
Last Compressor Off
Controlled Temperature < Setpoint - Shut Dn DT
Controlled Temperature > Setpoint - Shut Dn DT
Other Compressor Off
Controlled Temperature < Setpoint - Stage Dn DT
Controlled Temperature > Setpoint - Stage Dn DT
A qualitative example of compressors start-up sequence in cool mode operation is shown in the
graph below.
SP
SP+StageUpΔT
SP+StartUpΔT
ELWT [°C]
First
Compressor
On
Other Compressors On
Compressor starting
inhibited for maximum
pull down rate
Dead band
zone
# Compressors On
1
2
3
4
Compressors start-up sequence - Cool mode
Time
Time
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Productinformatie
Merk | Daikin |
Model | EWAQ-G-SS |
Categorie | Airco |
Taal | Nederlands |
Grootte | 11467 MB |