Daikin EWYA004D2V3P Installer's Reference Manual page 155

EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688013-1B – 2022.09
Pump outside range
When the pump operation function is disabled the pump will stop if the outdoor
temperature is higher than the value set by the Space
temperature [4‑02] or if the outdoor temperature drops below the value set by
the Space cooling off temperature [F‑01]. When the pump operation is
enabled, the pump operation is possible at all outdoor temperatures.
# Code
[4.9] [F-00]
Increase around 0°C
Use this setting to compensate for possible heat losses of the building due to the
evaporation of melted ice or snow. (e.g. in cold region countries).
In heating operation, the desired leaving water temperature is locally increased
around an outdoor temperature of 0°C.This compensation can be selected when
using an absolute or a weather dependent desired temperature (see illustration
below).
T T
t t
L
R
T
A
0°C
a
a Absolute desired LWT
b Weather dependent desired LWT
# Code
[4.A] [D-03]
Overshoot
Restriction: This function is only applicable in heating mode.
This function defines how much the water temperature may rise above the desired
leaving water temperature before the compressor stops. The compressor will start
up again when the leaving water temperature drops below the desired leaving
water temperature.
# Code
[4.B] [9-04]
Undershoot
Restriction: This function is only applicable in cooling mode during compressor
startup. It is NOT applicable for stable operation.
Pump operation:
▪ 0: Disabled if outdoor temperature is higher
than [4‑02] or lower than [F‑01] depending on
heating/cooling operation mode.
▪ 1: Possible at all outdoor temperatures.
L
R
T
A
0°C
b
Increase around 0°C:
▪ 0: No
▪ 1: increase 2°C, span 4°C
▪ 2: increase 4°C, span 4°C
▪ 3: increase 2°C, span 8°C
▪ 4: increase 4°C, span 8°C
Overshoot:
▪ 1°C~4°C
11 Configuration
|
heating
Description
Description
Description
Installer reference guide
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