INSTALLATION, WIRING & CONFIGURATION

Transcription

1 INSTALLATION, WIRING & CONFIGURATION REVISION 1 FORM # Easy-PTAC (Wireless Packaged Terminal Air Conditioner Controller) BUILDING INTELLIGENCE WORLDWIDE

2 Easy-PTAC (Wireless Packaged Terminal Air Conditioner Controller) 1 Overview The Easy-PTAC is a wireless controller designed to control PTAC (Packaged Terminal Air Conditioner) units within a Walker Wireless mesh network. Different algorithms can be programmed into the Easy-PTAC for a variety of different applications. The Easy-PTAC features a setpoint knob in Celsius, built in motion detection, a room temperature sensing thermistor with Walker Temperature Predicting Software and two inputs for additional sensors (CO2, door, etc ). Heating, cooling and 2 fan speeds (high and low) are controlled by the Easy-PTAC. Features Front Back 1.Backlit Display - Displays room temperature and current setpoint. 2.Motion indication LED When the Easy-PTAC has detected motion the LED turns on. 3.Motion detector Make sure the motion detector is never obstructed or covered. 4.Setpoint Knob Adjust the Setpoint Knob to the desired room temperature. The minimum and maximum allowed temperature can be adjusted in the Easy-PTAC. 5.Radio Programming Header This header is used to program the onboard radio and should never be used for programming in the field. 6.I/O Terminal Block All connections to the Easy-PTAC are made through this Terminal Block. 7.Processor Programming Header If a different algorithm is to be used or the settings are being changed via Easy-TOOL use this header to reprogram the processor. 8.Input Range Settings Used to select the type of device connected to the Inputs of the Easy-PTAC. 9.Communication Port Used to view and change all settings locally in the Easy-PTAC.

3 2 Backlit Display The Easy-PTAC uses a 2 line display with status indicators to display what the thermostat is doing. When the knob is turned, the backlight will turn on and stay on for 30 seconds after the setpoint has been changed Fan Indicator - Indicates if the Fan is on. 2.Heat Indicator - Indicates if heating is active. 3.Cool Indicator - Indicates if colling is active. 4.Object Name - Displays what is being displayed (Room Temperature, Time or Setpoint) 5.Object Value - Displays the value of the current displayed object.

4 3 Motion Detector The built in motion detector allows the Easy-PTAC to turn down the Setpoint when no bodies are detected in the zone. The motion detector has a range of 10 meters at a viewing angle of 150 degrees. Below are the objects pertaining to the motion detector: TM_MOTN Is the amount of time in minutes to wait after no motion is detected before changing the Setpoint to unoccupied. STSAV_H The heating Setpoint to control to when the TM_MOTN time has expired and the Easy-PTAC goes into unoccupied mode. STSAV_C The cooling Setpoint to control to when the TM_MOTN time has expired and the Easy-PTAC goes into unoccupied mode. When motion is detected, the Easy-PTAC will revert back to knob Setpoint for control. When no motion is detected for the specified time the Easy-PTAC will go into unoccupied mode. Make sure not to block or limit the vision of the motion detector. If the motion detector can not see motion it will always control to the no motion setpoint (STSAN_H OR STSAV_C).

5 4 Power Requirements The Easy-PTAC requires 24VAC and draws a maximum of 1.5VA to operate when maximum load (IPs and OPs). Ensure that one side of the 24VAC is grounded to Earth ground. Hardware Configuration The I/O Terminal Block is where all connections to the Easy-PTAC are made. Below is a breakdown of the Terminal Block connections. Inputs 24VAC - Connect 24VAC to this connection. GND - Connect this to the Earth Ground side of the 24VAC transformer. IP2 - Input for an external sensor. IP3 - Input for an external sensor. GND - Ground for IP2 and IP3. Both Grounds are connected internal in the Eay-PTAC. DO4 - When loaded with the default PTAC program controls the Fan High setting. DO3 - When loaded with the default PTAC program controls the Fan Low setting. DO2 - When loaded with the default PTAC program controls Cooling. DO1 - When loaded with the default PTAC program controls Heating. COMMON - The common between the four DOs. The two inputs are jumper configurable for multiple device types. These allow many different types of external sensors to be connected to the Easy-PTAC (i.e. CO2 sensor, Door contact switch, window switch, etc...). 10V - For sensors that produce 0 to 10VDC as a signal. 5V - For sensors that produce 0 to 5VDC as a signal. I - For sensors that produce 4 to 20 ma as a signal T - For a 3K NTC type thermistor or a contact closure. In the picture above IP2 is configured for a 0-5V input and IP3 is configured for a 3K thermistor. When shipped, the default Easy-PTAC algorithm does not use IP2 and IP3 to control outputs. The data from IP2 and IP3 are passed through the wireless network to the Walker System to view and be programmed in GCL. Caution: Make sure the jumper settings are correct for the input type into the Easy-PTAC. Damage may occur if settings are incorrect.

6 5 Outputs There are 4 Digital Relay Outputs on the Easy-PTAC. With the shipped default Easy-PTAC algorithm they control Heating (DO1), Cooling (DO2), Fan Low (DO3) and Fan High (DO4). To switch 24VAC to the relays for use with a PTAC, use a wire to jumper the 4 relays common; labeled COMMON; to the 24VAC applied to the Easy-PTAC. Tie the Common Ground (C) from the PTAC unit to GND on the Easy-PTAC. Other voltages can be switched as long as they do not exceed the maximum ratings: 1.2A 1.2A Software Configuration Easy-TOOL To connect the Atmel AVRISP mkii programming dongle to the Easy-PTAC, connect the ribbon cable header from the AVRISP mkii to the Easy-PTACs processor programming header as shown in the picture below. If connected correctly the LED on the AVRISP mkii will turn green. Please see the Easy-TOOL user guide on how to program through the Atmel AVRISP mkii.

7 6 Communication Port The communication port on the base of the Easy-PTAC allows all settings to be changed locally via a terminal program on a computer. To connect the Easy-PTAC to a computer for local changes a Cable-ROOMSTAT and DB9F6 (Both from Walker Technologies Corp.) are required. Connect the 3-pin end of the Cable-ROOMSTAT to the communication port on the base of the Easy-PTAC with the painted white strip facing the corner of the Easy-PTAC. Connect the RJ12 end of the Cable-ROOMSTAT to the DB9F6 and then connect the DB9F6 to an available comm. port on the computer or an USB to Serial adapter. DB9F6 Cable-ROOMSTAT To comm. port or USB to serial adapter The appropriate settings must be set in the terminal program used for proper communication to the Easy- PTAC. The settings are: - Bits per Second: Data bits: 8 - Parity: None - Stop Bits: 1 - Flow Control: None

8 7 Terminal Screen The terminal screen can be broken down into 4 sections: Detailed Object data Lists all information about each object in the Easy-PTAC 2. Control Overview Displays a summary of all the control points for the Easy-PTAC 3. Radio Overview Displays a summary of the radio settings 4. Selected Object Displays the current selected object for changing 4 3

9 8 Object Breakdown Each object is listed with an abundance of information. 10 Object number. If there is a lower case s the object can be commanded in GCL, if it is mapped to a point and s SUPERANBLE. USED_HT The name of the object The current value of the object. A Displays if the object is in control by software (Auto A ) or has been set by a user (Manual M ). If an L is displayed the objects value was written by the firmware in the Easy-PTAC. L If an S is displayed the objects value was written by GCL. If an e is displayed SUPEREANBLE is on and allows GCL to command the object. If an m is displayed SUPERMANUAL is on and the object can be commanded in manual mode. emlt If an l is displayed SUPERLOCAL is on and GCL is able to command objects displaying L. If a t is displayed TIMEDMANUAL is on and the point will revert to auto after the time set in EC_T_SUPER expires when command to manual (Physical Outputs only). The point the object will be mapped to in the Walker System. Displayed by a single letter (point type) followed by the point number (0-9). V VA point V2 C VC point F VF point I IP point O OP point Count down timer. If the object was command by GCL or a Physical Output was command to 0 manual, this displays the time left in minutes until the command is overwritten by the pervious value. Time is set in EC_T_SUPER. Navigating Through the Terminal Screen The keyboard and arrow keys are used to navigate through the terminal screen and change objects. (Left Arrow) (Right Arrow) (Up/Down Arrows) (Enter/Return) Q W N Other Letters Used to select the current displayed object. Used to set the current setting to the selected object. Scroll through objects and change values on selected objects. Cancel the change to an object or return to the object from its status menu. Writes settings to the radio. Reads the settings from the radio. Causes the radio to dump its Channel and Operational PAN ID and search for the network again. Pressing a letter other than the 3 listed above will cycle through objects starting with that letter.

10 9 To change an object from Auto A to Manual M follow the steps below: - Select the object so it is displayed in the Selected Object area of the terminal window. - Press the Left arrow key to select the object. - Press the Left arrow key again to display STATUS in place of the object name. - Press the Left arrow for a third time to select the STATUS - Press the Up/Down arrow keys until Man (Manual) is displayed - Press the Right arrow key to enter set the command. - Press Enter/Return to go back to the selected object. To change the value of the selected object: - Select the object so it is displayed in the Selected Object area of the terminal window. - Make sure the point is in manual. Most objects need to be in manual to command. - Press the Left arrow key to select the object. - Use the Up/Down arrow keys until the desired value is reached. Or some objects let you enter the value by typing it in on the keyboard. - Press the Right arrow key to enter set the value. ZigBee Mesh Network Settings These objects are the settings required for communication over the Wireless ZigBee mesh network. Refer to the Walker Wireless Setup Document (WW01-709) for further information on setting up the ZigBee mesh network. DEST_HI DEST_LW SET_PAN MY PAN SAC_ADR ADDRESS TIMESAC The top 32bits of the MAC address. Set to the destination device (usually Zcoord) The bottom 32 bits of the MAC address. Set to the destination device (usually Zcoord) The PAN ID of the network to join. The read PAN ID from the radio. The MicroSAC address the data is to be sent to. The wireless address of the device. Set to the MicroSAC address that is sending out the time. Set the channels to scan. Each bit of the 2 bytes represents a channel to scan. The radio will only scan channels selected. If the desired network is on a channel not scanned the radio will not join. Channel Bit Channel Bit Channel Bit ST_ATSC B C D E A 15 F I.e. to scan all channels set to FFFF. To on scan 1A set to 8000.