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WRT-424

PI Controller

Number of views:

1049

Category

PI Controller

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Product description

Features:

1. For 2-pipe FCU, to control 0-10VDC & 4-20mA modulating valve, Fan on/off.

2. For 2-pipe FCU, to control float-point valve, Fan on/off.

3. For 2-pipe FCU, to control 0-10VDC & 4-20mA modulating valve, and 220VAC three-speed Fan (High-Mid-low).

4. For 4-pipe FCU, to control 0-10VDC & 4-20mA modulating valve, and 220VAC three-speed Fan (High-Mid-low).

5. For 4-pipe FCU, to control 0-10VDC & 4-20mA modulating valve, Fan on/off.

6. Fan speed stage and valve open angle both can be displayed in the screen.

7. Password protected programmable for user and control parameters.

8. Blue back light.

Application:

● Air system—Supply air cascade control;

● Air/water system—for 2-pipe or 4-pipe HVAC system, radiator or roof refrigeration;

● Water system: Ground heating, radiator or roof refrigeration;

● For temperature controlling of single room, apartment in hotel or meeting room

Input/output requirement:

1. Temperature control for 2-pipe or 4-pipe HVAC system.

2. One built-in temperature sensor and one external temperature sensor. Optional connection for external temperature sensor or built-in temperature sensor via setting parameter.

3. Two analog outputs configuration: analog output voltage (0-10VDC) or Current (0-20mA) control signals can be chosen via a jumper to control proportional valve.

4. Three digital outputs configuration: three 5A/24VAC or three 5A/250VAC.

According to the change of jumper, control float-point valve, air damper or remote boot Fan motor and three-speed Fan.

Technical Specification

1.Power Supply:Operating Voltage: 24V AC 50/60 Hz ± 10%

Power Consumption: Max 3W

Electrical Connection: terminal Connectors

Electrical specification: Signal ground = power ground

2.Product standard:Protection class:IP30 Safety Class:III

3.Environment:Ambient temperature:-10...50℃ Humidity:<95% r.h.

Contour dimension

Operation Illustration of Controller

1. "P" key function:① Press P key for 3 sec, start user parameter or expert parameter setting function;

② Enter into user parameter or system parameter, click "P" for confirming;

2. Power Key:① Press Power key for 3 sec, power on/ power off

② Enter into user parameter or system parameter, click power key, you can change the set point, via clicking up-down adjustment key.

3. "M" switch key:① Switching between heating and cooling;

② Enter into system parameter, press “M” key repeatedly, you can change the parameter between 1L00, 2L00, IP00 and OP00.

4. "▼" & "▲" key:① You can adjust setting temperature;

② you can adjust the numerical value correspond to user parameter and system parameter.

Parameter specification

Warn：Only professional person can adjust the user parameter and system parameter.

1. user parameter setting:

Operating steps: Press "P" key for 3 sec, "00" appears in the LCD screen flickering continually. Press "up" key, change the password to "08", then press "P" for confirming. You can enter into user parameter setting interface, after "08" stop flickering.

Enter into user parameter setting interface, "UP00" appears on the top of the LCD screen, and the number under "UPOO" is its corresponding value. You can press Power Key to adjust the value. Press "up" key and "down" key to adjust the parameter value, the press "P" key to confirm.

Then, press "up" or "down" key to change the user parameter from UP00 to UP08.

2. system parameter setting:

Operating steps: Press "P" key for 3 sec, "00" appears in the LCD screen, flickering continually. Press "down" key, change the password to "88", then press "P" for confirming. You can enter into system parameter setting interface, after "88" stop flickering.

Enter into user parameter setting interface, "1L00" appears on the top of the LCD screen, and the number under "1LOO" is its corresponding value.

① Press “Power” Key, when “1L00” flickering,can setting 1L system parameter. Press "up" key and "down" key to adjust the "1LOO" corresponding value then press "P" key to confirm.

Then press "up" and "down" key to change the system parameter from 1L00 to 1L12.

② Press “M” key repeatedly, you can change the parameter between 1L00, 2L00, IP00 and OP00.

Repeat ① to change the corresponding value.

1: User parameters

Parameter	Description	Range	Standard
UP00	Enable change of operation modes 00=can't 01=can	00，01	01
UP01	Enable change of temperature set points 00=can't 01=can	00，01	01
UP02	Enable change of working modes Working mode switch: heating/cooling 00=can't 01=can	00，01	01
UP03	State after power failure 00=off 01=last state	00，01	00
UP04	Energy-saving mode open function 00=off 01=on	00，01	00
UP05	Celsius or Fahrenheit 00=Celsius 01=Fahrenheit	00，01	00
UP06-UP18	Reserved parameters
UP19	Lighting time 0=Normally lighting unit: seconds	00，99	5

2: System parameter (The parameter values which can't be changed is the reserved parameters, have no impact on the controller's operation.

Parameter	Description	Ranger	Standard
1L00	Standby set point shift	02—06℃	05
1L01/1L03	Minimum set point limit for cooling/heating	00—10℃	05
1L02/1L04	Maximum set point limit for cooling/heating	00—99℃	35
1L05	Temperature correction value, The actual display/10	00—99℃	00
1L06	Temperature compensation 00=off 01=increase 02=decrease	00—02	00
1L07-1L19	Reserved parameters
IP00	Selection of temperature sensor 00=Internal sensor NTC，01=External sensor NTC,02=External sensor 0-10V	00—02	01
IP01	Samples taken for averaging control signal		10
IP02	Input overrun alarm 00=off 01=on	00，01	00
OP00	Floating point output signal 00=off DO1&DO2，01=on DO1&DO2	00，01	01
OP01	Analog output 00=on 01=off	00，01	00
OP02	Minimum Limitation of output signal	00—02	00
OP03	Maximum Limitation of output signal	03—10	10
OP04	Time setting for floating point output	15—95	90
OP05	2-pipe or 4-pipe system : 00= 2-pipe, 01= 4-pipe	00，01	00
OP06	Type of digital output: 00=float-point valve；01=3-speed fan output , 02=0-10V	00，01	00
OP07-OP15	Reserved parameters
OP16	Dead zone between heating & cooling set point, 0.1℃	00-99	00
OP17	PID Proportional constant	00-99	00
OP18	PID Integration time	00-99	00
OP19	PID Derivative time	00-99	00