GE CC-SCSTAT manual

g SmartCommand Thermostat Installation Manual[...]

Copyright Copyright © 2007 GE Security. All rights r eserved. This document may not be copied in whol e or in part or other wise reproduced without p rior written consent from GE Security except where speci f icall y permitted under US and international copyright law . Document number/r evision: 1060018A (July 20 07). Disclaimer The information in[...]

iii Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Conventions used in this documen t. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

SmartCommand Thermostat Installati on Manu al iv Serial communicati on test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 HVAC system test ing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

1 Preface This is the GE SmartCommand Thermostat Installation Manual for model CC-SCST A T . This document includes an overview of the product and detailed instructions explaining: • how to install; and • how to operate the thermostat. There is also informatio n describing how to con tact technical support if y ou have questions or concern s. T[...]

SmartCommand Thermostat Installati on Manu al 2 Product overview The SmartCommand thermostat (model CC-SCST A T) pr ovides typical thermostat functions as well as the capability to send and receive informa tion via serial communica tions. This capability a llows the thermostat’ s setpoint, mode, and fan operati on to be changed remotely . In addi[...]

3 WDU LEDs The four LEDs on the WDU display various status inform ation. The LEDs have dynamic on-screen labels tha t can change when you change screens. WDU screens One of the unique features of the WDU graphical display is the ability to have mu ltiple display screens. In addition to a main Thermostat contr ol screen, menus and other control scre[...]

SmartCommand Thermostat Installati on Manu al 4 Thermostat contr ol scr een The Thermostat contr ol s creen ( Figur e 2 ) is the default display screen normally displayed on the WDU. F igure 2 . The rmo sta t con trol scree n Temperature display The WDU will normally disp lay the current temperature from the inte rnal digital temperature sensor or [...]

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 pre ss Down to decrease the setpoi nt one degree. Press ing and holding a button down will cause the setpoint to continuously change until th e button is released. The setpoints can be set from 6 to 109° (F or C)[...]

SmartCommand Thermostat Installati on Manu al 6 Run/Hold button The Run/Hold button controls the automatic schedule operatio n. In hold mode, the current temperature is maintained until changed by manual or remote network command. In the run mode, the sche dule loaded into the thermostat is activated and setp oints will change according to the sche[...]

7 Main menu scr een The thermostat has a menu tree that can be accessed by pressing the Menu button on the main Thermostat contr ol screen. V arious configurations of the unit can have dif ferent screen contents. The first screen that will display is the Main menu screen ( Figur e 3 ). This is a list of the other menus or functions that you can acc[...]

SmartCommand Thermostat Installati on Manu al 8 Messages screen The Messages screen ( Figur e 4 ) allows you to retrieve text messa ges sent from the serial network to the thermostat. The Messages screen fea tures navigation buttons to read new and old messages and delete messages. Y ou can store up to 16 messages. If mo re tha n 16 messages are re[...]

9 Schedule setup screen The Schedule setup screen allows you to review and set the setback schedule fo r the ther mostat. The thermostat has a 4 by 7 schedu le. Four times a day can be selec ted for heating and coo ling setpoints. Each day o f the week can have a different schedule. Groups o f days can be c o pied with the same schedule. When the t[...]

SmartCommand Thermostat Installati on Manu al 10 Heat and cool schedule screen When you se lect the Heat and cool schedule menu item, the Heat and cool schedu le screen ( Figur e 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 h as been highlighted, use the[...]

11 Copy schedule screen The Copy schedule screen ( Figur e 7 ) is a sub screen of the Heat and cool sche dule scr een on page 10. The Copy schedule screen allows you to copy a day’ s schedule to another day or group of days. T o copy a day’ s sche dule, do the followin g: 1. Select the day to be copied in the Heat and cool schedule screen. Scro[...]

SmartCommand Thermostat Installati on Manu al 12 User settings screen The User settings screen ( Figur e 8 ) allows you to set or change various us er options of the thermostat such as the clock, minimized screen timeout, Fahrenheit/Centigrade mode, sensor calibratio n, and backlight settings. F igur e 8. User settings screen Screen options include[...]

13 Set clock screen The Set clock screen ( Figur e 9 ) is a sub screen of the User settings screen. The Set clock screen allows you to set the thermostat’ s internal clock. T o set the time and day , do the following: 1. Move the cursor with the navi gation arrows until the data you want to change is highlighted. 2. Press Up ( +) or Down (-) to i[...]

SmartCommand Thermostat Installati on Manu al 14 Sensor calibration screen The Sensor calibration screen ( Fi gur e 10 ) is a sub screen of the User settings scr een on page 12. The Sensor calibration screen allows you to change the temperature calib ration for the internal and any external remote temperature sensors attached to the thermostat. Y o[...]

15 Backlight display screen The Backlight display screen ( Figur e 1 1 ) is a sub screen of the User settings screen. The Backlight display screen allows you to set th e backlight on and of f brightness levels and contrast. F igur e 11. Backlight display screen Screen options include: Backlight timeout. Set the time after the last button press that[...]

SmartCommand Thermostat Installati on Manu al 16 Thermostat information screen The Thermostat information screen ( Figure 12 ) displays the current co nfigur ation of the thermostat wall display unit and the HV AC control unit. This information is useful for quick check of firmw are versions and HV AC system setup. It also shows the network address[...]

17 Installer settings screen The Installer settings screen is a hidden screen d esigned for installer use only . Do not change any settings in this screen unless you are a qualified service technician. Changing these settin gs will af fect the operation of the heating/cooling system. T o enter this screen, go to the Main menu scr een on pa ge 7 and[...]

SmartCommand Thermostat Installati on Manu al 18 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 lock ed (Y), you can still access the Menu screen, but you will not be allowed to select any menu options. The Installer settings screen hidden b[...]

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 of f at setpoint. Cooling delta stage 1 on: 1 to 8 deg rees (default 1). Set the delta from setpoint that stage 1 cooling starts. Stage 1 turns of f at setpoint. Cooling delta stage 2 on: 1 to 8 deg rees (default 3). Set t[...]

SmartCommand Thermostat Installati on Manu al 20 Installation over view Before you remov e an existing t hermostat and instal l the SmartCommand thermost at, 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 protecti[...]

21 Freeze protection In cold climates that require the heating system to be used for building freeze prot ection, a mechanical backup freeze protection device must be inst alled on the heating syst em. This can be a simp le mechanical heating thermostat or a preset thermoswitc h installed in the heated area ( Figure 15 ). F igu re 15. Freeze protec[...]

SmartCommand Thermostat Installati on Manu al 22 Wall display unit installation Choose a location for the wall display unit (WDU) that be st represents the temperature of the area to be controlled. A void locations that are subject to dr afts or areas with direct sunlight exposure. Mounting T o mount the WDU, see Figur e 16 and do the following: 1.[...]

23 Control unit installation Install the control unit in a protecte d, conven ient, ind oor location near the HV AC system or in a service accessible area such as an equipment cl oset or garage. Mount the control unit in a vertical position on a wall or sturdy structural member . If you mount the contro l unit on the HV AC system, be careful to avo[...]

SmartCommand Thermostat Installati on Manu al 24 HV AC system wiring W i ring 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 Figur e 18 shows the wiring diagram for a standard gas or electric HV AC system. W iring colors are typical thermostat wiring [...]

25 For standard HV AC system s, follow these guidelines: Single-stage systems. Use W1 for heating stage 1, and Y1 for cooling stage 1. T wo-stage heating systems. Use W1 for stage 1, and W2 for stage 2 heating. T wo-stage cooling systems. Use Y1 for stage 1 and Y2 for stage 2 cooling. HV AC sy stem 24 V AC tr ansformer If you have an integrated hea[...]

SmartCommand Thermostat Installati on Manu al 26 Heat pump HVAC system wiring Figur e 19 shows the wiring diagram for a heat pump HV AC system. W ire colors are typical thermostat color codes. Note: Do not cut JP1 for heat pump systems. RC and RH are common for heat pumps. F igur e 19. Heat pump HV AC system wiring C 24 V AC common R 24 V AC r etur[...]

27 For heat pump HV AC systems, follow these guidelines: Single-stage compressor systems. Use Y1 for stage 1 heating/cooling, and W1 for stage 2 heating (heat strips). T wo-stage compressor systems. Use Y1 for stage 1, Y2 for stage 2 heating/cooling, and W1 for stage 3 heating (heat strips). DIP switches T o set the SW1 DIP switches for standard HV[...]

SmartCommand Thermostat Installati on Manu al 28 Control unit connection The control unit requires 24 V AC power from the HV AC system it is controllin g. Connect the 24 V AC Common (blue wire/terminal) and 24 V AC R (red wire/terminal) from the HV AC system to the control unit’ s HV AC system terminal block J4’ s 24V Com and 24V RH (or 24V RC)[...]

29 Serial communication Serial communication includes: • RS485 com port • RS485 address • RS485 protocol • Thermostat netw ork commands RS485 com port The thermostat has a RS485 serial com port. This is a two-wire (plus ground) , half-duplex communication network. T ypically , the thermostat will be used on the SmartCommand network and conn[...]

SmartCommand Thermostat Installati on Manu al 30 RS485 protocol The thermostat has a robust serial protocol. It is based on a simple ASCII message forma t as described in the Serial Communications Protocol manual, DCN: 150-00225. Note: Not all of the comma nds/variable s def ined in the protocol document are applicable to the SmartCommand thermosta[...]

31 Syst em checklist W e strongly recommend that you hook -up and run a simple bench test be fore 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 T o bench test the thermostat, do the fol lowing: 1. Connect the WDU to the contro[...]

SmartCommand Thermostat Installati on Manu al 32 Serial communication test Connect the thermostat to a PC via an RS 232/485 converter to a PC serial com port. Note: Any RS232 to RS485 adapter used with SmartCommand serial thermostats mu st have au tomatic send data con trol. T o use W indows HyperT erminal, do the following: 1. Set up a direct conn[...]

33 HVAC system testing If you have diffi culty with the HV AC system operation, you can do the following test to verify the HV AC system is operational. Thermostats, like the SmartCommand thermostat, are just switches to the HV AC system as shown in the Figur e 20 . This is a simplified example of a thermostat and a standard HV AC wiring diagram. Y[...]

SmartCommand Thermostat Installati on Manu al 34 Standard HV A C system quick t est Y ou can do a quick test of the HV AC system by sh orting across the appropriat e terminals on the HV AC system’ s thermostat c onnector . Use a short 6-in . wire to connect across the terminals shown in Ta b l e 1 . Heat pump system quick t est Y ou can do a quic[...]

35 Control unit wiring Figur e 21 shows the control unit wired to a wall display uni t and the HV AC system. W ire colors are typical thermostat wiring colors. The fuse is a mini A TO 2 amp. Note: For heat pump HV AC systems, the orange wire (O) is the changeov er valv e. F igur e 21. Control unit wiring HV AC system tr ansformer Most central HV AC[...]

SmartCommand Thermostat Installati on Manu al 36 DIP switch SW1 settings White indicates a switch is in the On po sition. Set the DIP switches as follows: SW1-S1. HV AC system type selection. S tandard or heat pump. Set S1 to Off (STD) for gas/el ectric systems (default setting). Set S1 to On (HP) for heat pump systems. SW1-S2. This is a dual-use s[...]

37 Serial network command and variable list Refer to the Serial Communication s Pr otoco l Manual 150-00225 for format details. Network commands Ta b l e 3 shows the network commands an d a description of each command. Tab le 3. Netwo rk comma nds Command Description BF Set setback flag CFM Set F or C temperature mode Date Set date DL Set display l[...]

SmartCommand Thermostat Installati on Manu al 38 Network variables Ta b l e 4 shows the network variables for use w ith the system variable, SVx command. The system type, fan typ e, and changeo ver type vari ables are determined by th e controller DIP switch SW1 setting. They can be viewed by th e system variable comm and, but cannot be ch anged f [...]

39 Contacting technical suppor t For assistance installing, operating, maintaining, and troubleshooting this product, refer to this document and any other documentation provided. If you still have questions, you ma y contact technical support during normal business h our s (Mon day thro ugh Friday , excluding holid ays, b etween 6 a.m. an d 5 p.m. [...]

SmartCommand Thermostat Installati on Manu al 40[...]