Daikin EWYQ130DAYN [334/524] Thermostat control
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Daikin EWYQ130DAYN [334/524] Thermostat control

Daikin EWYQ210DAYN [334/524] Thermostat control
Functional Control for a Standalone Unit ESIE06-05
2–108 Part 2 – Functional Description
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1
2
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3.4 Thermostat Control
Introduction The thermostat control is used to generate a load -up or load-down according to the active thermostat,
if the load-up respectively load-down timer is finished (this means gone to "0").
The thermostat can be set to regulate on different signals:
■ Signal from the water sensor at the inlet of the evaporator.
■ Signal from the water sensor at the outlet of the evaporator.
■ Signal from the water sensor at the inlet of the condenser (only for EWYQ).
■ Signal from the water sensor at the outlet of the condenser (only for EWYQ).
There are several possible functions for the thermostat control:
■ Cooling: inlet evaporator control.
■ Cooling: outlet evaporator control.
■ Heating: inlet condenser control (only for EWYQ).
■ Heating: outlet condenser control (only for EWYQ).
■ External analog signal. ( 0 - 1V, 0 - 10V, 4 -20 mA, 0 - 20 mA).
■ Floating setpoint.
Mode change over Modechange inlet/outlet:
■ From Manual to inlet/outlet (or reverse): switch off all compressors.
■ From inlet to outlet (or reverse): switch off all compressors.
Modechange cooling/heating:
■ From cooling to heating (or reverse): switch off all compressors.
Thermostat timers
and actions
■ If the temperature is below the setpoint, the thermostat control will check every LOADDOWN
TIMER (example for cooling mode).
According to the deviation to the setpoint, no action, load up, load down is required.
■ If the temperature is above the setpoint, the thermostat control will check every LOADUP TIMER
(example for cooling mode).
According to the deviation to the setpoint, no action, load up, load down is required.
Default and limit
values
(*)
can only be modified in the service menu.
Default value
INLET CONTROL
Units 1
circuit
Units 2 cir-
cuit
Lower
Limit
Upper
Limit
Step difference - a (K)
4.0
(*)
2.0
(*) ______ ______
Steplength - c (K)
0.2
(*) _______
______
Loadup timer (sec) 180 15 300
Loaddown timer (sec) 30 15 300
Setpoint cooling (°C) 12.0 7.0 23.0
Setpoint heating (°C) 40 20.0 45.0

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