SmartCommand Thermostat Installation Manual g
Copyright Copyright © 2007 GE Security. All rights reserved. This document may not be copied in whole or in part or otherwise reproduced without prior written consent from GE Security except where specifically permitted under US and international copyright law. Document number/revision: 1060018A (July 2007). Disclaimer The information in this document is subject to change without notice.
iii Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Conventions used in this document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Safety terms and symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv SmartCommand Thermostat Installation Manual Serial communication test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 HVAC system testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 Control unit wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Preface This is the GE SmartCommand Thermostat Installation Manual for model CC-SCSTAT. This document includes an overview of the product and detailed instructions explaining: • • how to install; and how to operate the thermostat. There is also information describing how to contact technical support if you have questions or concerns.
2 SmartCommand Thermostat Installation Manual Product overview The SmartCommand thermostat (model CC-SCSTAT) provides typical thermostat functions as well as the capability to send and receive information via serial communications. This capability allows the thermostat’s setpoint, mode, and fan operation to be changed remotely. In addition, the remote systems can request status of the thermostat’s temperature, setpoints, modes, and other system information.
3 WDU LEDs The four LEDs on the WDU display various status information. The LEDs have dynamic on-screen labels that can change when you change screens. WDU screens One of the unique features of the WDU graphical display is the ability to have multiple display screens. In addition to a main Thermostat control screen, menus and other control screens for special functions are provided.
4 SmartCommand Thermostat Installation Manual Thermostat control screen The Thermostat control screen (Figure 2) is the default display screen normally displayed on the WDU. Figure 2.
5 Up and down buttons The Up and Down buttons adjust the setpoint temperature. Press Up to increase the setpoint value by one degree and press Down to decrease the setpoint one degree. Pressing and holding a button down will cause the setpoint to continuously change until the button is released. The setpoints can be set from 6 to 109° (F or C), unless limited in the installer settings. You cannot lower the cooling setpoint below the heating setpoint.
6 SmartCommand Thermostat Installation Manual Run/Hold button The Run/Hold button controls the automatic schedule operation. In hold mode, the current temperature is maintained until changed by manual or remote network command. In the run mode, the schedule loaded into the thermostat is activated and setpoints will change according to the schedule and the time and day of the week. Away mode. There is also an away mode that you can select if you press and hold the Run button for three seconds.
7 Main menu screen The thermostat has a menu tree that can be accessed by pressing the Menu button on the main Thermostat control screen. Various configurations of the unit can have different screen contents. The first screen that will display is the Main menu screen (Figure 3). This is a list of the other menus or functions that you can access. Standard screens are listed in this manual, your screen may vary with different configurations or revisions. Figure 3.
8 SmartCommand Thermostat Installation Manual Messages screen The Messages screen (Figure 4) allows you to retrieve text messages sent from the serial network to the thermostat. The Messages screen features navigation buttons to read new and old messages and delete messages. You can store up to 16 messages. If more than 16 messages are received, the oldest is erased to make room for the newest message.
9 Schedule setup screen The Schedule setup screen allows you to review and set the setback schedule for the thermostat. The thermostat has a 4 by 7 schedule. Four times a day can be selected for heating and cooling setpoints. Each day of the week can have a different schedule. Groups of days can be copied with the same schedule. When the thermostat is set to run mode, the schedule will be executed daily, with the setpoints being changed as per that day’s schedule stored in the thermostat.
10 SmartCommand Thermostat Installation Manual Heat and cool schedule screen When you select the Heat and cool schedule menu item, the Heat and cool schedule screen (Figure 6) opens and the schedule for the current day will be displayed. Use the scroll buttons to highlight the data to be modified. Once the data has been highlighted, use the Up (+) and Down (-) buttons to change the value of the data.
11 Copy schedule screen The Copy schedule screen (Figure 7) is a sub screen of the Heat and cool schedule screen on page 10. The Copy schedule screen allows you to copy a day’s schedule to another day or group of days. To copy a day’s schedule, do the following: 1. Select the day to be copied in the Heat and cool schedule screen. Scroll to the C at the bottom of the Heat and cool schedule screen to highlighted it. The Next button will change to the Copy button.
12 SmartCommand Thermostat Installation Manual User settings screen The User settings screen (Figure 8) allows you to set or change various user options of the thermostat such as the clock, minimized screen timeout, Fahrenheit/Centigrade mode, sensor calibration, and backlight settings. Figure 8. User settings screen User Settings Set Clock Screen Timeout F/C Mode Sensor Calibration Done Done + Plus Up 30 F - Minus Down Select Select Screen options include: Set clock.
13 Set clock screen The Set clock screen (Figure 9) is a sub screen of the User settings screen. The Set clock screen allows you to set the thermostat’s internal clock. To set the time and day, do the following: 1. Move the cursor with the navigation arrows until the data you want to change is highlighted. 2. Press Up (+) or Down (-) to increase or decrease the value to the desired setting. 3. Press Set to set the time and return to the main Menu screen or wait for the screen to timeout.
14 SmartCommand Thermostat Installation Manual Sensor calibration screen The Sensor calibration screen (Figure 10) is a sub screen of the User settings screen on page 12. The Sensor calibration screen allows you to change the temperature calibration for the internal and any external remote temperature sensors attached to the thermostat. You can change the temperature calibration by ± 7 degrees. When the Sensor calibration screen is selected it will show the internal and all detected remote sensors.
15 Backlight display screen The Backlight display screen (Figure 11) is a sub screen of the User settings screen. The Backlight display screen allows you to set the backlight on and off brightness levels and contrast. Figure 11. Backlight display screen Backlite/Display Backlite Timeout 0 ON Level 100% OFF Level 0% Contrast 5 Done Done + - Plus Minus Up Down Select Select Screen options include: Backlight timeout.
16 SmartCommand Thermostat Installation Manual Thermostat information screen The Thermostat information screen (Figure 12) displays the current configuration of the thermostat wall display unit and the HVAC control unit. This information is useful for quick check of firmware versions and HVAC system setup. It also shows the network address setting Thermostat information displayed includes: Wall display unit. Model and firmware version number. Control unit. Model and firmware version number.
17 Installer settings screen The Installer settings screen is a hidden screen designed for installer use only. Do not change any settings in this screen unless you are a qualified service technician. Changing these settings will affect the operation of the heating/cooling system. To enter this screen, go to the Main menu screen on page 7 and press and hold the two inner control buttons for three seconds until the Installer settings screen (Figure 13) appears.
18 SmartCommand Thermostat Installation Manual Screen options include: Display lock: Y or N (default N). Use this setting to lock or unlock the thermostat wall display unit buttons. When the buttons are locked (Y), you can still access the Menu screen, but you will not be allowed to select any menu options. The Installer settings screen hidden button operation is always operational, allowing you to return to this screen and turn the display lock off. Service mode submenu: Y or N (default N).
19 Heating delta stage 3 on: 1 to 8 degrees (default 5). Set the delta from setpoint that stage 3 heating starts. Stage 3 turns off at setpoint. Cooling delta stage 1 on: 1 to 8 degrees (default 1). Set the delta from setpoint that stage 1 cooling starts. Stage 1 turns off at setpoint. Cooling delta stage 2 on: 1 to 8 degrees (default 3). Set the delta from setpoint that stage 2 cooling starts. Stage 2 turns off at setpoint. WDU settings submenu. Messaging enable: Y or N (default N).
20 SmartCommand Thermostat Installation Manual Installation overview Before you remove an existing thermostat and install the SmartCommand thermostat, follow these guidelines: • • • • Record existing wiring information. Do the bench test. Check WDU wiring before applying power to the control unit. Be sure to install a freeze protection device as required. Figure 14 shows the standard thermostat wiring versus retrofit applications. Figure 14.
21 Freeze protection WARNING: Do not use this thermostat for freeze protection. In cold climates that require the heating system to be used for building freeze protection, a mechanical backup freeze protection device must be installed on the heating system. This can be a simple mechanical heating thermostat or a preset thermoswitch installed in the heated area (Figure 15). Figure 15.
22 SmartCommand Thermostat Installation Manual Wall display unit installation Choose a location for the wall display unit (WDU) that best represents the temperature of the area to be controlled. Avoid locations that are subject to drafts or areas with direct sunlight exposure. Mounting To mount the WDU, see Figure 16 and do the following: 1. To open the WDU case, pull from the lower corners of the case. Figure 16.
23 Control unit installation Install the control unit in a protected, convenient, indoor location near the HVAC system or in a service accessible area such as an equipment closet or garage. Mount the control unit in a vertical position on a wall or sturdy structural member. If you mount the control unit on the HVAC system, be careful to avoid the hot burner section and high vibration areas.
24 SmartCommand Thermostat Installation Manual HVAC system wiring Wiring will differ depending on if your system is a standard gas or electric system or if your system is a heat pump system. Standard HVAC system wiring Figure 18 shows the wiring diagram for a standard gas or electric HVAC system. Wiring colors are typical thermostat wiring color codes. Note: For typical central heating/cooling systems, leave jumper JP1 installed.
25 For standard HVAC systems, follow these guidelines: Single-stage systems. Use W1 for heating stage 1, and Y1 for cooling stage 1. Two-stage heating systems. Use W1 for stage 1, and W2 for stage 2 heating. Two-stage cooling systems. Use Y1 for stage 1 and Y2 for stage 2 cooling. HVAC system 24 VAC transformer If you have an integrated heating and cooling system with a single transformer, do not cut jumper JP1. Wire the 24V Return (red) wire to either RH or RC. This is typical of most central systems.
26 SmartCommand Thermostat Installation Manual Heat pump HVAC system wiring Figure 19 shows the wiring diagram for a heat pump HVAC system. Wire colors are typical thermostat color codes. Note: Do not cut JP1 for heat pump systems. RC and RH are common for heat pumps. Figure 19.
27 For heat pump HVAC systems, follow these guidelines: Single-stage compressor systems. Use Y1 for stage 1 heating/cooling, and W1 for stage 2 heating (heat strips). Two-stage compressor systems. Use Y1 for stage 1, Y2 for stage 2 heating/cooling, and W1 for stage 3 heating (heat strips). DIP switches To set the SW1 DIP switches for standard HVAC systems, do the following: 1. Set SW1-1 (position 1) to the On (HP) position (to the right). 2.
28 SmartCommand Thermostat Installation Manual Control unit connection The control unit requires 24 VAC power from the HVAC system it is controlling. Connect the 24 VAC Common (blue wire/terminal) and 24 VAC R (red wire/terminal) from the HVAC system to the control unit’s HVAC system terminal block J4’s 24V Com and 24V RH (or 24V RC) terminals. The RH and RC terminals are connected together by JP1 (factory default).
29 Serial communication Serial communication includes: • • • • RS485 com port RS485 address RS485 protocol Thermostat network commands RS485 com port The thermostat has a RS485 serial com port. This is a two-wire (plus ground), half-duplex communication network. Typically, the thermostat will be used on the SmartCommand network and connected to the Smart Command automation controller. The RS485 com port communication setup is 9600 baud, 8 data bits, 1 stop bit, and no parity. Flow control is set to None.
30 SmartCommand Thermostat Installation Manual RS485 protocol The thermostat has a robust serial protocol. It is based on a simple ASCII message format as described in the Serial Communications Protocol manual, DCN: 150-00225. Note: Not all of the commands/variables defined in the protocol document are applicable to the SmartCommand thermostat, check Section 8 of the protocol manual for details.
31 System checklist We strongly recommend that you hook-up and run a simple bench test before installing the thermostat. Not only will this save you time in system checkout, but will also make you familiar with the thermostat’s operation. Thermostat bench test To bench test the thermostat, do the following: 1. Connect the WDU to the control unit with a short (12 to 24 in.) four-wire cable. 2. Before power up, set the control unit DIP switch, SW1 to ALL OFF. 3. Connect power to the control unit. 4.
32 SmartCommand Thermostat Installation Manual Serial communication test Connect the thermostat to a PC via an RS232/485 converter to a PC serial com port. Note: Any RS232 to RS485 adapter used with SmartCommand serial thermostats must have automatic send data control. To use Windows HyperTerminal, do the following: 1. Set up a direct connection session to the com port you will be using on the PC. 2. Configure port settings to 9600 baud, 8 bit, no parity, 1 stop bit, and no flow control. 3.
33 HVAC system testing If you have difficulty with the HVAC system operation, you can do the following test to verify the HVAC system is operational. Thermostats, like the SmartCommand thermostat, are just switches to the HVAC system as shown in the Figure 20. This is a simplified example of a thermostat and a standard HVAC wiring diagram. You can test the HVAC system operation by duplicating the thermostat switch operation by shorting across the thermostat terminals on the HVAC system. Figure 20.
34 SmartCommand Thermostat Installation Manual Standard HVAC system quick test You can do a quick test of the HVAC system by shorting across the appropriate terminals on the HVAC system’s thermostat connector. Use a short 6-in. wire to connect across the terminals shown in Table 1. Table 1. Standard system quick test Function test HVAC terminals Result Fan R to G Fan should come on. Heating R to W Heat cycle should start for heating.
35 Control unit wiring Figure 21 shows the control unit wired to a wall display unit and the HVAC system. Wire colors are typical thermostat wiring colors. The fuse is a mini ATO 2 amp. Note: For heat pump HVAC systems, the orange wire (O) is the changeover valve. Figure 21.
36 SmartCommand Thermostat Installation Manual DIP switch SW1 settings White indicates a switch is in the On position. Set the DIP switches as follows: SW1-S1. HVAC system type selection. Standard or heat pump. Set S1 to Off (STD) for gas/electric systems (default setting). Set S1 to On (HP) for heat pump systems. SW1-S2. This is a dual-use switch that depends on the switch S1 setting. If S1 is set to Standard HVAC system type, then S2 selects the HVAC fan type.
37 Serial network command and variable list Refer to the Serial Communications Protocol Manual 150-00225 for format details. Network commands Table 3 shows the network commands and a description of each command. Table 3.
38 SmartCommand Thermostat Installation Manual Network variables Table 4 shows the network variables for use with the system variable, SVx command. Table 4.
39 Contacting technical support For assistance installing, operating, maintaining, and troubleshooting this product, refer to this document and any other documentation provided. If you still have questions, you may contact technical support during normal business hours (Monday through Friday, excluding holidays, between 6 a.m. and 5 p.m. Pacific Time). Table 5. Sales and support contact information Sales Phone: Technical support Toll-free: 888.GESECURity (888.437.
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