Danfoss RESD Data sheet

Data sheet

RESD Series Thermostat

Description

RESD series thermostat adopts button-hidden fashion appearance design. It is used to control temperature for industry, commercial and residential. Models are available for heating, cooling, ventilating control. The application is Fan Coil control.

RESD series thermostats are with microprocessor and big LCD display included working state (cooling, heating, ventilating), fan speed, ambient temperature, setting temperature

etc. pushbutton includes turn on/off ( ), mode (), clock (), fan speed () and temperature adjustment ().

Shell is Fire retardant PC ABS, as figure 86×86 mm, thicker 13 mm.

Model denominations

RESD -

HC2: Control Motorized Valve and 3-speed fan. When the temperature reaches the setpoint, it will close the Motorized Valve and Fan both.

HC4: Control 4 pipe fan coil units, Control two Motorized Valves and 3-speed fan. When the temperature reaches the set-point, it will close the Motorized Valve and Fan both.

Basic features

•Room temperature setting

•Manual or Auto 3-speed changeover

•Defrost (low temperature protection)

•Clock, Timer, 7 days programmable (-T74)

•Blue backlight

•Auto Restart ( Option )

•Keypad Lock ( Option )

Status display

•Working Status: Cool ,

Heat , Ventilation

•Fan Speeds: Low , Medium , High and Auto

•Room temperature display

•Temperature setting display

•FCU valve

•Clock week display

	Ordering
		Type	Application	Pipe system	Control mode to	Fan running mode	Code No.
					zone valve
		RESD HC 2	Heating/Cooling	2 pipe system	On / off	Auto / Manual	193B0913
		RESD HC 4	Heating / Cooling	4 pipe system	On / off	Auto / Manual	193B0914

DH-SMT/SI

Vx.xx.xx.xx © Danfoss 09/2010

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Data sheet	RESD Series Thermostat

Technical data

Sensing element	NTC
Accuracy	Temperature ± 1 °C, time ± 1min./month
Set-point range	5-35 °C
Display range	0-55 °C
Operation environment	Tmin 0 °C, Tmax 45 °C
Power supply	85-260 V~, 50/60 Hz
Switch current rating	Resistive 2 A, inductive 1 A
Switching action	Type 1B
Control pollution	Degree 2
Rated impulse V	2.5 kV
Ball hardness	75 °C
Power reserve	24 hours minimum
Setting accuracy	± 0.5 °C, ±1 min.
Rated power	< 1 W
Wiring	Screw-in terminals, each terminal capable of accepting 2 × 1.5 mm2 wires
Housing	PC + ABS flame retardant
Dimensions	86 × 86 × 13 mm (W × H × D)
Hole pitch	60 mm (standard)
Protection class	IP30
Disply	LCD

Operation	• On/Off: Press “ ” to turn on, press “ ” again
	to turn off thermostat and its output.

•Setting temperature: press “” to reduce temperature, press “” to raise temperature (0.5 °C changed each press) set point

only valid in current period of time; Clock adjustment, turn on/off or 7 days

programming modification, it will perform

new settings.

Note:

When 4 periods function On, press “” or ”” to adjust current set-point, “Override” will show on LCD, it denote the thermostat will run as per current setting instead of 4 periods setting.

•Mode Selection: Press “” to change system working in cooling “”, heating “” or ventilation “” mode, the related icon will flash, and it will be confirmed automatically after 6 seconds.

•Fan speed select: Press “” to select “ (Hi),

(Med), (Low), (Auto)”.

In mode “ (Auto)”, the fan-speed changed automatically. Auto LOW-speed when the difference between room-temperature and setting-temperature exceed 1 °C, Auto MEDspeed when exceed 2 °C, Auto HI-speed when exceed 3 °C.

Clock calibration	• Clock calibration: Press “” till to display
	“hh:mm” and “hh” flash, press “” or “” to
	adjust hour, press “”, “mm” flash, press “” or
	“” to adjust minute; Press “”, “week” flash,
	press “” or “” to adjust Mon to Sun.

Timer ON and timer OFF	• Timer on: Press “”, till to display “” and
	“ON” and all flash, and also “hh” flash, press
	“” or “” to adjust hour. Press “”, “mm”
	flash, press “” or “” to adjust minute.
	• Timer off: Press “”, till to display “” and
	“OFF” and all flash, and also “hh” flash, press
	“” or “” to adjust hour. Press “”, “mm”
	flash, press “” or “” to adjust minute.

•Canceling timer on: Press “”, till to display “” and “ON” and all flash, and also “hh” flash, press “” or “” to adjust hour to “--:--”. Press “”, “mm” flash, press “” or “” to adjust minute to “--:--”.

•Canceling timer off: Press “”, till to display “” and “OFF” and all flash, and also “hh” flash, press “” or “” to adjust hour to “--:- -”. Press “”, “mm” flash, press “” or “” to adjust minute to “--:--”.

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Vx.xx.xx.xx © Danfoss 09/2010

DH-SMT/SI