INTRONICS PI02 Floating Digital Thermostat INSTALLATION MANUAL

INTRONICS PI02 Floating Digital Thermostat

APPLICATION

PI series is a 24 VAC single fan speed Floating Digital Thermostat that provides Proportional + Integral (P+I) control for optimum temperature control and comfort in HVAC system. Other available features include the selection of Minimum / Maximum setting temperature, Digital input for energy savings and selectable display mode. The remote temperature sensor can also be provided as the optional

Model	Mounting	Operating voltage	Type of control	Power on/off switch
PI – 01	Vertical	24 VAC	Floating	No
PI – 02	Vertical	24 VAC	Floating	Yes

FEATURES

• Stylish design with digital display.
• Minimum temperature setting from 5 – 23 ºC (Default 11 ºC).
• Maximum temperature setting from 16 – 34 ºC (Default 30 ºC).
• Compatible with 10 different characteristics of modulating valve/damper.
• Setting valve running time.
• Kp setting.
• Ti setting.
• Temperature offset –2 to +2 ºC (Default 0 ºC).
• Digital input for energy savings.
• Mode of display : Room temperature, Setting temperature or % of valve/damper opening.
• Remote sensor (optional) with auto detect of temperature sensor (internal or remote sensor).
• Sensor error alarm.
• EEPROM permanently retains user setting in case of power loss.

Specification

Power supply	24 Vac nominal, 18 – 30 Vac, 50 / 60 Hz.
Electrical rating	1.5 Amp maximum
Temperature setting range	5 – 34 ºC
Operating relative humidity	5 to 90 % RH, non condensing
Output	Floating (24 Vac)
Mounting	Directly onto wall or 2”x 4 “ vertical junction box

Dimension

OPERATION

• Power on off (for Model PI – 02 only)
  Use ON/OFF switch to turn on / off the system.
• Temperature setting
  Use △or ▽to change the temperature setting.
• Minimum temperature set point
  The system provides the facility to program the minimum setting point in a range of 5 – 23 ºC (with 2 ºC incremental).
• Maximum temperature set point
  The system provides the facility to program the maximum setting point in a range of 16 – 34 ºC (with 2 ºC incremental).
• PI Control parameter
  The system provides the facility to program the value of Kp and Ti.
• Temperature offset
  The temperature offset can be set in a range of – 2 to + 2 ºC.
• Display mode
  The Display can be programmed to display room temperature, setting temperature or % of valve/damper opening.
• Temperature display in decimal number
  In case of selecting program 8.0 and 9.1, Press △and ▽key simultaneously to toggle showing room temperature in integer or decimal number. To exit this program, cut off the power.
• Remote sensor (optional)
  The Remote sensor can be provided as the optional. It can be the temperature module, epoxy or pipe type. The system will automatically detect whether the internal or the Remote sensor is used.
• Digital input for energy savings
  There is a Digital input port for energy savings provided in the system. If the input is NO contact, the system will not do anything. If the input is NC contact, it will delay for 2 minutes and then
  • raise up the setting temperature for 2 ºC, and
  • activate the dot LED after the second digit as an alarm.
• Sensor error alarm
  If the temperature sensor (either internal or remote) is failed, Display will show Er in blinking.
• Target error alarm
  If the target of the valve/damper opening can not be reached within 2 minutes (for Feed back type only), Display will show Ef in blinking.

INSTALLATION

Read these instructions thoroughly before installing the product. Failure to follow these instructions could damage the product or cause a hazardous condition. Check the voltage and current ratings on the product to ensure that it is suitable for your application. Installer must be a trained, experienced service technician. Check product for proper operation after installation.
CAUTION
Damage to the cooling system may occur.
Disconnect power from the equipment at the main breaker/fuse block while installing the thermostat.

Mounting Location.
Mount the thermostat approximately 5 ft. (1.5 m) above the floor in a location that is free from direct sunlight, heat from appliances, hot or cold air from ducts, concealed pipes and chimneys, and drafts or dead spots behind doors or in corners. Do not mount on an exterior wall, if possible. Failure to locate the thermostat mounting as indicated will result in poor temperature control.
NOTE: Level thermostat mounting is for appearance only and is not required for proper thermostat operation.

Mounting Thermostat
Take out the back plate by removing the locking screw (if any) at the bottom of the thermostat. Use a flat head screwdriver to unlock the snaps. Lift and pull it up to remove back plate.

Using a back plate as a guide, mark two mounting holes on the wall. Drill two mounting holes. Place anchors (provided) into the holes until flush with the hole. Position back plate on the wall and
thread the wires from the heating and cooling equipment through the wiring hole. Holding the back plate in place on the wall, secure it to the wall using mounting screws (provided).

Wiring

• Pull the connector from the back of the thermostat by inserting a screwdriver at the base of the connector and gently lift upThe 18-22 gauge wire is recommended for wiring.
• Loosen the terminal screw, strip the wire, and connect the wire Firmly tighten the terminal screw when finished
• Place the terminal back into the thermostat, and make sure it has the same orientation like in the picture described at the back. Snap the thermostat to its backplate

• Secure the thermostat by tightening the screw provided to protect the thermostat from access

INSTALLER SETUP

The following instructions provide information to test the cooling equipment and to change operating parameters from the factory settings.

Enter Installer Setup

• Press and hold △and key simultaneously for 10 seconds to enter the installer setup. The dot between the two digit display lits showing the Installer Setup mode

• The first digit shows the Programming number. The second digit shows the Parameter setting.
• Now follow the following steps to change each of the settings. Each time you press △key, you will advance to the next Programming number. The ▽key is used for Parameter setting.
• The first digit shows the Programming number. The second digit shows the Parameter setting.
• Now follow the following steps to change each of the settings. Each time you press △key, you will advance to the next Programming number. The ▽key is used for Parameter setting.

Program 1 : Minimum temperature setting
To set the minimum temperature (5-23 ºC) allowed for the user.

• Press △key until the first digit is 1.
• Press ▽key until the second digit is as required. See table below.

Second digit displays	0	1	2	3	4	5	6	7	8	9
Min. temp. setting	5	7	9	11	13	15	17	19	21	23

Program 2 : Maximum temperature setting
To set the maximum temperature (16-34 ºC) allowed for the user.

• Press △key until the first digit is 2.
• Press ▽key until the second digit is as required. See table below.

Second digit displays	0	1	2	3	4	5	6	7	8	9
Max. temp. setting	16	18	20	22	24	26	28	30	32	34

Program 3 : Setting of Minimum opening
The minimum valve/damper opening can be set in a range of 0 – 50%.

• Press △key until the first digit is 3.
• Press ▽key until the second digit is as required. See table below.

Second digit displays	0	1	2	3	4	5
Min. opening %	0	10	20	30	40	50

Program 4 : Setting valve running time
This program is used to select valve running time (from closed position to fully opened).It can be set in a range of 80-170 seconds.

• Press △key until the first digit is 4.
• Press ▽key until the second digit is as required. See table below.

Seconddigitdisplays	0	1	2	3	4	5	6	7	8	9
Openingtime(sec.)	80	90	100	110	120	130	140	150	160	170

Program 5 : Kp setting
Kp is the proportional factor that control the opening of the valve/damper. The higher K p, the faster the room temp. is brought to the set temp. However the fluctuation of the room temp. is also higher. Then K p shall be set properly

• Press △key until the first digit is 5.
• Press ▽key until the second digit is as required. See table below.

Second digit displays	0	1	2	3	4	5	6	7	8	9
Ti	40	50	60	70	80	90	100	120	160	200

Program 6 : Ti setting
Ti is the integral factor that control the opening of the valve/damper. The higher T i, the slower the room temp. is brought to the set temp. However the fluctuation of the room temp. is less. Then T i shall be set properly.

• Press △key until the first digit is 6.
• Press ▽key until the second digit is as required. See table below

Program 7 : Temperature offset
The temperature offset of the sensor’s reading can be set in a range of –2 to 2 ºC with the resolution of 0.5ºC.

• Press △key until the first digit is 7.
• Press ▽key until the second digit is as required. See table below.

Second digit displays	0	1	2	3	4	5	6	7	8
Offset temp. (ºC)	-2	-1.5	-1	-0.5	0	0.5	1	1.5	2

Program 8 : Display mode
The user can set the Display to show

• Room temperature or
• Set temperature or
• Valve/damper opening in %
• Press △key until the first digit is 8.
• Press ▽key until the second digit is as required. See table below.

Second digit displays	0	1	2
Display	Room temp.	Set temp.	% valve/damper open

Program 9 : Temperature display in decimal number
The user can set the temperature display to show

• Integer number
• Decimal number
• Press △key until the first digit is 9.
• Press ▽key until the second digit is as required. See table below

Second digit displays	0	1
Display	Integer number	Decimal number

Note: The default setting is 0 (Integer number).

REFERENCE:

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INTRONICS PI02 Floating Digital Thermostat INSTALLATION MANUAL

INTRONICS PI02 Floating Digital Thermostat INSTALLATION MANUAL