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920415 Comfort Zone Installation and Start-Up

1. A B 2 SPEED 2 SPEED HEAT PUMP HEAT PUMP 38YD 38YD COMFORT ZONE SYSTEM FAN COIL COMFORT ZONE SYSTEM FAN COIL dcum UNIT 24 VAC 6 D 1 ___L PA R UNIT 24 6 9 Red ___ TRH _ fA R coo vn amp egeeU Im ___ rs eare COOL 2 Y2 Blue L _____ pst eis v2 a p y HEAT 1 W1 See Bl HEAT 1 W1 a p n HeaT2 wa _ ___ _ HEAT 2 W2 eon ___ tye Ae FAN G Green FAN e gereen ___ N RV COOL O CERE HN Ic RV COOL 0 20 g Cranage _ RV HEAT 0 Gv epe E ReHEAT O epos E H H 4 10 fh chek L L L L LEX 4 Yi Li S Hog C C R1 uio eui ts Latent Capacity Control LCC R1 Relay DPST Pilot Duty 24 v coil HN61KK324 or Equivalent H Humidistat opens on humidity rise HL88MG026 Fig 22 Typical W
2. Fig 17 Shielding For A Single Comfort Zone System 8 COMM COMM BUS BUS HAM CONTROLLER 9401 e WRG G Ri Ri WR WR SHIELD dc kr ur 214 218 712 GROUND a d on enun p L Zone 2 X eec 4 Zone Controller mm 756 1 1 o Zone 3 I d gy TEHE NEN _ Zone 4 Zone 1 L 9 57 Dx Coil Outside Air Duct Remote Room Sensor Sensor Sensor Sensors C ication B optional optional ommunication Bus Custom Cable L duet gen dt fr 00 B SEF A 4984 a T m E O N 1 LOUT TOPHONE PHONE LINE POWER COMM BUS 22992 00000 00000 _ BYXA R BYGWR BYGWR Home Access Module Smart Sensor Power Pack optional optional Itis recommended that a 5 wire cable be used to install Remote Room Sensors to allow Z p for future upgrade to Smart Sensors 2 Smart Sensor optional 94311 5 WIRE CONDUCTOR INTERFACE BOARD 3 WIRE CONDUCTOR COMM BUS Ca GREEN e E O RED FIELD WIRING FEED THRU BOARD Fig 18 Wiring Four Zone Controller MON CAUTION
3. FURNACE UNIT 24 C geet 44R Li R cooL1 ees cooL2 v2 op 1 wi E go pee T N HEAT2 W2 6 e pg ew Ola Green FAN G ae RV COOL 0 jg Orange n RV HEAT 0 oE 1 1 L NOTE Put set up switch No 2 KGATT0101VSP 5 at the control board to the ON position up when using Two Stage Relay Kit Black KGATTO101VSP TO 7 Accessory Optional a 1 Cd L me cur NA m L 5 CONNECTION AT CONTROL BOARD 2 SPEED AIR CONDITIONER 38TD COMFORT ZONE CENTER FURNACE UNIT 24 Geet grew ssec al ea 7 cooL2 v2 e e gBue wt gme 71 119 HEAT 2 W2 jg Brown 8 FAN 8 i oposm ri e A Orange TP 1 1 0 OE 1 RV HEAT Gage l A Pi 1 Os CET R1 Latent Capacity Control LCC R1 Relay DPST Pilot Duty 24 v coil HN61KK324 or Equivalent Humidistat opens
4. 24 VAC Transformer Field Supplied 50 VAC req for basic To 4 damper system Please HVAC see Page 1 Electrical System Rating for details 16 AWG to Grounded to Water Pipe or Solid Electrical Ground ta 2 2 BYPASS 21 PWR 24VAC 598 5 x 5 5 ctorcom cor chm 9097 5 3383 5 0000 00000 000 3 gee UU pe pen yo qu gsn Power Em 56 5 C au 99 WPIS na 4 1HI el 4 F4 F FTTTT a PECES COMFORT ZONE oe 8 COMM COMM BUS CHR 06 BUS HAM CONTROLLER 2 ooo oo 190220909000 WRG G pu BE R WR SHIELD X ORT LAT Z 4 713 212 GROUND EXE E Zone 2 7 4 Zone Controller ien L Zone 3 l tl i Zone 4 Zone 1 UE Dx Coil Outside Air Duct Remote Room Sensor Sensor Sensor Sensors DA optional optional Communication Bus Custom Cable E
5. R1 roti Latent Capacity Control LCC R1 Relay DPST Pilot Duty 24 v coil HN61KK324 or Equivalent Humidistat opens on humidity rise HL38MG026 H 2 SPEED HEAT PUMP 38YD COMFORT ZONE CENTER FURNACE UNIT 24 R E 0 9 H 4 3 R cooi v agre Geben COOL 2 Y2 ope i Ed HERTAN 1 aea HEAT2 W2 amp ep wwi W3 Green FAN G e gp RV co0L 0 EXC poene 1 waro 4 e Meet eater E Sox Dy NOTE 38YD with dual fuel use the 38YD Furnace Interface and Balance Point feature on the heat pump control to operate dual fuel option Configure the 4 Zone controller to act as if it were controlling a single speed heat pump Turn T 6 ON Turn T 9 amp T 26 OFF Set S 7 to 0 Let the 38YD perform the dual fuel optimization In addition lock furnace into low fire This may help prevent over conditioning during the back up heat furnace mode This will also allow the furnace to stage between low and high fire Before using this feature read furnace Installation Instructions for two stage operation Connect W2 from the Comfort Zo
6. co 72 245 68 0 4i lt gt 93208 Fig 1 Comfort Zone System Hardware Failure Error Table see 22 Wiring Diagrams deeem n hee 23 32 Configuration ERE ERSUH Roue 33 SAFETY CONSIDERATIONS Improper installation adjustment alteration service maintenance or use can cause fire electrical shock or other conditions which may cause personal injury or property damage Consult a qualified installer service agency or your distributor or branch for informa tion or assistance The qualified installer or agency must use factory authorized kits or accessories when modifying this prod uct Refer to the individual instructions packaged with the kits or accessories when installing Follow all safety codes and wear safety glasses Have fire extinguisher available Read these instructions thoroughly and follow all warnings or cautions attached to the unit Consult local and state building codes and Sheet Metal and Air Conditioning National Associaton SMACNA for special installation require ments Recognize safety information This is the safety alert symbol A When you see this symbol on the unit or in instructions and manuals be alert to the potential for personal injury Understand the signal word DANGER WARNING or CAU TION These words are used with the safety alert symbol DAN GER identifies the most seri
7. with every scan or outside air temperatures on the bus ON Heat Pump mode No heat pump operation Used for electric OFF T6 Heat Pump Operation First stage heat pump will energize Y1 to turn compressor heat or gas furnace W1 will be energized on for heat The system assumes that an outside air temperature sensor 7 T7 Outside Air Temperature is attached and will broadcast the outside air temperature on 222 alr temperature sensor Is not OFF the communication bus if enable broadcast is turned on T8 Comfort Trend Stagin mand exceeds 2 F and the zone temperature as not im sii Te ging proved at least 0 1 F for 6 minutes The 6 minute timer is stages Er reset if the zone temperature trend is improving When the fan switch is set to AUTO the system will not en 5 T9 Auto Fan For Heat ergize the fan during heat modes This allows the equipment Cool is energized during heating OFF to control fan operation for proper heat exchanger warm up The system will check leaving air temperature measured by the duct sensor for excessive heating and cooling limits Operates the same as ON position but T10 High Low Temperature Limits Cool limits are fixed at 50 F second stage cool de dampers will not modulate open in a LAT ON energized and 45 F first stage cool de energized Heating trip limits are programmable between 105 110 to 155 175 F f Rotary switch positions 1
8. CONTROL BOARD HEAT PUMP 38YD COMFORT ZONE CENTER ye Ce UNIT 24 8 Red Li R cooivn DOs cooL2 Y e plc Fg HEAT 1 W1 p ge i nes 1 HEAT 2 W2 e op Laa wh L3 ws FAN 8 E gpgose er Inc LA s RV COOL 0 ao PI RV HEAT O jj Pack W3 Secon 0701 i L KGATT0101VSP D wet NE 1 Am 4Y1 2 C 1 2 O O E ra P5 FO CX CONNECTIONAT R1 Relay DPST Pilot Duty 24 v coil HN61KK324 or Equivalent NOTE Put set up Switch No 2 at the control board to the ON position up when using KGATT0101VSP Accessory Optional Fig 23 Typical Wiring Diagrams Furnace with Heat Pump Continued 31 2 SPEED HEAT PUMP 38YD COMFORT ZONE CENTER FURNACE UNIT 24 VAC 6076 He LX amp e mg ee D rc COOL 2 Y2 ggg it HEAT 1 W1 aor iy G HEAT 2 w2 OPPE ta E TW A Orange 1 Black RV HEAT O _ 20 67988 1 NE ERAN W3 1 L L4 H A LA
9. 3 Return selection dial to any run mode position 1 Turn selection dial to position S7 23 Dual Fuel Trip Temperature Error 2 Change the value 3 Return selection dial to any run mode position 1 Turn selection dial to position 9 24 Base Temperatures Error 2 Set base temperatures Do not overlap with 14 maximum cooling minimum heating set point range 3 Return selection dial to any run mode position 21 HF ERROR CODE Table 14 Hardware Failure Errors Error Display Dial Position T4 must be turned on DESCRIPTION SOLUTION 40 Zone 1 Temperature Sensor Bad sensor shorted or open 1 Check wiring and sensor 2 Replace failed sensor if necessary Valid temperature range 30 180 F 41 Zone 2 Temperature Sensor Bad sensor shorted or open 1 Check wiring and sensor 2 Replace failed sensor if necessary Valid temperature range 30 180 F 42 Zone 3 Temperature Sensor Bad sensor shorted or open 1 Check wiring and sensor 2 Replace failed sensor if necessary Valid temperature range 30 180 F 43 44 Zone 4 Temperature Sensor Duct Temperature Sensor Bad sensor shorted or open 1 Check wiring and sensor 2 Replace failed sensor if necessary Valid temperature range 30 180 F Bad sensor shorted or open 1 Check wiring and sensor 2 Replace failed sensor if necessary Valid temperature range 30 180 45 Outside Air Temper
10. Changing the base temperatures will change the Comfort Temperatures Setpoints used in the system schedules Always set the Base Temperatures prior to programming the system schedules Comfort Zone also uses a minimum temperature and a maximum temperature for the comfort setpoints The minimum and maxi mum temperatures are the same for all 4 zones The Maximum Temperature is only used for cooling It is set by selecting Rotary Switch Position S 2 The Maximum Temperature setting is used when a temperature above the 14 span is selected If the Cooling Base Temperature is set to 68 F and the cooling setpoint is 82 F any attempt to raise the cooling setpoint will select the Maximum Temperature The Minimum Temperature is only used for heating It is set by selecting Rotary Switch Position S 3 The Minimum Temperature setting is used when a temperature below the 14 span is selected If the Heating Base Temperature is set to 54 F any attempt to lower the heating setpoint below 54 F will select the Minimum Temperature Both the Maximum and Minimum Temperatures are intended for use with schedules or setpoints which are extreme compared to normal building temperatures Comfort Zone also has one additional set of temperature settings These are the Vacation Setpoints The Vacation Setpoints are the heating and cooling setpoints to be used in all 4 zones whenever the Four Zone Controller rotary switch is turned to Vacation The Vacation
11. SERES X Carrier ME ff 9 HEATING amp COOLING 920415 Comfort Zone Installation and Start Up Instructions NOTE Read the entire instruction manual before starting the installation TABLE OF CONTENTS PAGE Safety Consideration 2 1 Installation Considerations 1 2 Introductions ene 2 Installation eene 2 18 Check Equipment and Jobsite ees 2 WIFE 2 3 Shielded Cable 2 3 Install Comfort Zone Center eere 3 Install Zone Dampers eese 3 5 Round Metal Ductwork eese 4 Rectangular Metal Ductwork eene 4 Round Flexible Ductwork eene 4 5 Rectangular Fibrous Glass Ductwork 5 Install Barometric Bypass 5 Install Duct Temperature Sensor eee 5 6 Install Dx Coil Sensor eere 7 Install Four Zone 7 Comfort Zone System Wiring 7 8 Install Remote Room Sensor or Smart Sensors 6 Sequence Of Operation sss 6 13 Temperature Setpoints 6 Heating and Cooling Comfort Setpoints 6
12. The Outside Air Temperature Sensor must be used whenever an Outside Air Damper is installed An Outside Air Temperature Sensor must also be used for dual fuel applications Step 16 Troubleshooting This section contains information to assist you in troubleshooting problems and errors associated with the Comfort Zone System The most common operating problems and different types of errors associated with the Comfort Zone System are Operating Problems No display flashing display and flashing HEAT or COOL annunciators Comfort zone controller selects a 18 system mode but does not energize the heating cooling unit Hardware Failure HF Errors Occur when the comfort zone controller detects a problem with 1 of its own components or an associated device Storage Failure SF Errors Occur when the comfort zone controller detects and replaces faulty data contained within its memory with factory selected default values Transparent Errors Occur when the comfort zone controller detects a system or zone operating problem When any zone cannot maintain room temperature within 5 F of the desired setpoint for a period of 20 minutes a comfort trend error is declared This error is transparent and will not be shown on the controller display If a Home Access Module is on the system the ACS dealer or national ACS reponse center will receive a call identifying this error CARE AND MAINTENANCE For continuing optimum performance
13. 4 position when using ai Two Stage Relay Kit or Equivalent KGATT0101VSP q 5 Accessory Optional B STANDARD SINGLE SPEED HEAT PUMP COMFORT ZONE CENTER FURNACE UNIT 24 VAG 6 o 9 9 44R NR ve pret REM vval 4 rv coo2 vo m up peus nD appie _ lwwi fw2 ET HEAT2 W2 e poe W2 FAN gpo D O Orange 16 ITT 1 epo grapes RV HEAT 0 eps j J A NOTE Locking furnace into low fire may help prevent over conditioning in the heating mode This will allow the furnace to stage between low and high fire Before using this feature read furnace Installation Instructions for two stage operation Connect W2 from the Comfort Zone Center to W2 on the furnace control board See Furnace Installation Instructions For Details Involving Set Up Switch Configuration and Two Stage Furnace Operation D Fig 23 Typical Wiring Diagram Furnace with Heat Pump 2 SPEED HEAT PUMP 38YD COMFORT ZONE CENTER
14. 50 75va Step 3 Install Comfort Zone Center NOTE The Comfort Zone System is approved for indoor use only and should never be installed with any of its components exposed to the elements The enclosure must be installed with the center cover to help prevent damage from other sources Do not mount the Comfort Zone Center where it will be accessible to children Do not locate the center in areas of the home that are noise sensitive since relays are energized and de energized during operation and may be an annoyance Install Comfort Zone in an area with a temperature range between 32 F and 120 F Install the Comfort Zone Center in either a vertical or horizontal position Locate in an area that is easily accessible in case servicing should be required NOTE Four vent plugs and 2 bushings have been supplied Snap the bushings in the 1 in diameter holes that are to be used for wiring and the plugs in the remaining holes osi NOTE 1 NOTE 2 SHIELD DRAIN WIRE TYP Ig PORT 1 PORT 2 ISOSAT 01 DEVICE BUS TYP SHIELD DRAIN WIRE TYP 2 1 PORT 2 5 5 01 NOTES 1 Use butt splices or solder for shield connections Then tape up shield 2 Do not connect the shield drain wire at the end of Communication Bus Cut and tape up to avoid shorting PORT 1 PORT 2 ISOSAT 01 E ch PERSONAL COMPUTER OR MODEM PORT 1 J ISOSAT 0
15. A93230 Fig 20 Typical Wiring Diagrams Fan Coil with Air Conditioner Continued 24 STANDARD STANDARD SINGLE SPEED SINGLE SPEED AIR CONDITIONER AIR CONDITIONER COMFORT ZONE CENTER VARIABLE SPEED COMFORT ZONE CENTER FURNACE FURNACE lt Red 2 UNIT 24 VAC 670 8 R UNIT 24 R 6 B R coo v 06108 9 3 req eee coio mes 2 6 oe fe 67980 p ous coo2 v2 ge peus HEAT iw epe X pem iY HEAT 1 W1 gie ___ E Yr 1 HEAT2 W2 E eo sew L Hw HEAT2 w2 g e go ow NET L e Eg TG d o x 1 9 orange RV COOL 0 eon RV HEAT e ag Beck RV HEAT O Peck 2 KGATT0101VSP L O O Black af 1 3 m NOTE Put set up Switch P5 No 2 at the control CONNECTION AT poa Ue ON CONTROL BOARD position up wh
16. Apply 24vac directly across relay 1 Verify that there are no obstructions binding the damper blade or shaft 2 Check for 24 VAC across common and either the open or close terminals Damper Will Not Open or Close 3 Check stop switch If defective replace actuator 4 Verify that motor is operating correctly 5 Check damper fuse System is Too Nois 1 Make sure bypass damper is working properly y y 2 Verify that ductwork is properly sized 1 Check for drafts Unstable Temperature Readings 2 Use shielded cable 1 Make sure that the sensor wire is not run in parallel with any wires carrying AC voltage 2 Disconnect all other sensors from the comfort zone board and check to see if the sensor reading is still fluctuating 3 Disconnect all other sensors from the comfort zone panel and check to see if the problem still exist 4 Disconnect the 4 zone controller and re wire it directly to the board with a separate 5 conductor cable 5 If all sensors are still fluctuating replace the 4 zone controller 6 If only 1 sensor is fluctuating disconnect that sensor from the board and re wire it directly to Room Sensors Fluctuating the I O board using a separate 2 conductor cable 7 If the sensor still has the problem replace the I O board 8 Verify if shielded or non shielded cable is being used 9 If shielded follow through the remaining steps If non shielded go to No 6 10 Verify that the shield is connected to the comfo
17. UNIT 24 VAG 6070 8 5 9 R N 609 p IC US 80 cooL2 v2 e geuen HEAT 1 W1 cp gie 1 UT G HEAT 2 W2 6 epo borse wb L3 FAN G gp ro Ol Orange r3 Y n 112 RV COOL e e M ME RV HEAT O g Black di L i TU eee bl aps 8 amp C RI I OR AA AO Ics Ley etel ee he E ERE R1 Relay DPST Pilot Duty 24 v coil HN61KK324 or Equivalent E 2 SPEED HEAT PUMP 38YD COMFORT ZONE CENTER FURNACE UNIT 24 R o B9 9 R cooL v 618 1819 n use PL L3 coo2 2 Keepgse LO White EE HEAT1 W1 L44 7 HEAT 2 W2 aos on 43 F H W 1 4 w FAN G os Green a F O Orange 1Y EE 17 RV COOL 0 6009 1 Ex RV HEAT 0 e ge E 1 L 1 E 1 Or Mp ieee Ho ae OE Latent Capacity Control LCC R1 Relay DPST Pilot Duty 24 v coil HN61KK324 or Equivalent Humidistat opens on humidity rise HL38MG026 2 SPEED
18. Zones within a building Each zone has independent temperature settings The comfort temperature settings can change automatically through the use of schedules This allows Comfort Zone to change the temperature settings in zones to reflect occupancy or usage For example you may want to condition the bedrooms in a home from 5 00 PM through 7 00 AM or the kitchen from 3 00 PM through 6 00 PM The Comfort Zone System uses motorized air volume control dampers also called zone dampers to regulate the flow of conditioned air into the zones In this manner Comfort Zone can selectively heat or cool certain portions of a building depending upon the space temperature requirements INSTALLATION Step 1 Check Equipment and Jobsite INSPECT EQUIPMENT File claim with shipping company prior to installation if shipment is damaged or incomplete Step 2 Wiring WARNING To prevent personal injury or possible equipment damage disconnect the power supply before routing wire wiring must comply with local and state codes NOTE A remote room sensor requires a 2 wire cable however it is recommended that a 5 wire cable be installed to allow for a possible smart sensor upgrade Connect white wire to terminal labeled B if a 5 wire cable is used Connect red wire to Shielded cable is recommended to reduce noise interference NOTE Use No 22 AWG color coded insulated 35 min wire If thermostats are to be located more
19. all auxiliary heat will be off and vice versa NOTE The auxiliary heat must always have greater heating ability than the heat pump at low outdoor temperatures for this option to have any value NOTE If the Dual Fuel setpoint is set to 0 then this option is disabled If Dual Fuel option is used an outside air temperature sensor or refrigerated air sensor must be used When the dual fuel setpoint variable is set to the outdoor temperature 10 F to 60 F that is the crossover point between running the heat pump or using the auxiliary heat as the preferred method of heating The setpoint is used only when the first stage of heating is brought on If the outdoor temperature is above the setpoint the heat pump Y1 is energized If the outdoor temperature is below the setpoint the auxiliary heat W1 is used If the heat pump is started and the outdoor temperature goes below the setpoint the dual fuel option is not used for that heating cycle PROGRAMMABLE OPTIONS TOGGLES Turn the zone selector dial to position T See Fig 19 The controller display shows the setting number and its value The upper left 2 digits show the setting number while the right side shows the value of ON or OFF Press the COOL up or down setpoint buttons to change the toggle number and the HEAT up or down setpoint buttons to change the status of the toggle See Table 11 14 Step 12 Wiring Diagrams Table 7 Wiring Diagram Reference For Fig 20
20. Check your local codes NOTE All zone dampers and ductwork must be properly sup ported according to local codes or SMACNA standards RECTANGULAR FIBROUS GLASS DUCTWORK 1 Insert 1 end of zone damper into 1 end of fibrous glass ductwork approximately 2 to 3 in See Fig 14 2 Screw field supplied screws and tabs into zone damper 3 Properly seal joint using duct tape mastic or other approved method 4 Insulate damper using 1 1 2 in to 2 in insulation Check your local codes 1 2 STEEL STRAP A92481 Fig 13 Insulated Round Flexible Ductwork FIBROUS eS SUPPLIED DUCTWORK SCREWS ZONE x DAMPER 2 3 92480 Fig 14 Rectangular Fibrous Glass Ductwork 11 2 TO 2 INSULATION A92482 Fig 15 Insulated Rectangular Fibrous Glass Ductwork Step 5 Install Barometric Bypass Damper NOTE The barometric bypass damper is a critical part of the Comfort Zone System for control of minimum airflow and noise reduction It is recommended that the bypass be installed The bypass should be installed according to local codes and SMACNA standards Be sure the bypass is properly supported For proper installation refer to the Installation Instructions pack aged with the barometric bypass CAUTION Failure to properly install the bypass damper can cause permanent damage to the HVAC equipment For single speed furnace applications
21. Fig 6 Damper Motor Positioning A93248 ACTUATOR HOUSING DAMPER WIRING FIELD TERMINALS INSTALLED POWER INSTALLED WIRING WIRING gt OR CONDUIT e FACTORY INSTALLED WIRING A92474 Fig 7 Damper 24 vac Connections The damper will modulate counter clockwise to open and clock wise to close In the full open position the crank arm connection on the motors threaded shaft will be closest to the motor In full closed position it will be furthest away from the motor If in an emergency it becomes necessary to force a damper open manually loosen the set screws located on the crank and then turn the damper shaft To realign apply 24vac between COM and OP Adjust and tighten screws To avoid noise and vibration do not hard mount dampers to any solid structure i e joists NOTE There is a limit switch at the full open position and the full closed position to stop damper travel ROUND METAL DUCTWORK IMPORTANT If application exists with all metal ductwork without insulation flex connectors must be used on each end of the zone dampers to avoid noise and vibration 1 Crimp end of branch duct 2 Slip end of zone damper over end of ductwork Use self tapping sheet metal screw to secure See Fig 8 SUPPLY FLEX CONNECTOR Fig 8 Round Metal Ductwork ZONE DAMPER A92477 3 Properly seal joint using duct tape mastic or other approved metho
22. Low Temperature Limits Enabled Rotary Position T 10 2 High Temperature Trip Limit Rotary Position S 6 3 Dx Coil Sensor For Leaving Air Temperature Checking Rotary Position T 27 First High Low Temperature Limits Enabled must be turned ON This is the ON OFF switch for the control option The temperature used for this control is measured by the Remote Duct Sensor and optionally the DX Coil Sensor The High Temperature Trip Limit Rotary Position S 6 is the supply air temperature for heating that the Leaving Air Tempera ture control uses to detect a problem during heating modes only The Comfort Zone thermostat will display a number between 05 and 55 F The actual temperature is 100 F greater such that the actual range is 105 F to 155 F Comfort Zone cannot display the 100 s digit Selecting the Offset Temperature picks the temperature when Comfort Zone will start taking action to correct the Leaving Air Temperature If the limit temperature is between 105 F and 109 F then the temperature at which first stage will be shut down will be offset 5 F above the limit value 110 F to 114 F If the limit temperature is between 110 F and 155 F then the temperature at which the first stage will shut down will be offset 20 F above the limit value 130 F to 175 F For Cooling modes the temperature is fixed at 50 F 10 C for starting the control and 45 F 7 2 C for turning off first stage cooling The heating value must be set give
23. amp 9 Sequence of Events For a Normal Heating or Cooling Selection of Reference Zone In The System Pre positioning Dampers And Starting Phe System Controlling The Zone Dampers Operating The Heating And Cooling Equipment 10 Control Strategy For Heating Cooling Stages 11 Configuration Options For Equipment Operation 11 Relay To HVAC Equipment Connections 11 Starting The HVAC 11 12 Stage Control During Equipment Operation 12 13 Configuring Four Zone 13 14 Programmable Options Settings 13 14 Programmable Options Toggles sess 14 Wiring Diagram Reference Tables sss 14 Start Up eiie tee et Be RR 14 15 Programming Schedules sese 15 17 System Switches uie pee ee eret 15 Controller Display ss eere ERR 15 Zone Selector Dial eere 15 17 ANCCESSOTIES a esee ods a o ER E RE e 17 18 Troublesho ting a 18 Care And Maintenance 218 Toggle Summary Table 2 19 Operating Problem 20 Storage Failure Error 2 21 Comfort Zone Center
24. and to minimize possible equipment failure it is essential that periodic maintenance be performed on this equipment Consult your servicing contractor or User s Manual for the proper frequency of maintenance Fre quency of maintenance may vary depending upon geographic areas Step 1 Leave User s Manual With Homeowner Explain system operation and maintenance procedures outlined in User s Manual Table 11 Toggle Summary TOGGLE SETTING ON OFF DEFAULT Time guard delay is 30 sec overrides 5 minute delay be tween de energizing and re energizing HVAC stages This Time delay is standard 5 minutes be T1 Timeguard Override option automatically returns to OFF after 30 sec timeout If tween de energizing and re energizing OFF equipment has been shut down due to a leaving air tem HVAC stages perature trip the timeguard override has no effect Temperature and setpoints are displayed T2 Celsius Display Temperature and setpoints are displayed in Celsius degrees in Fahrenheit degrees OFF T3 2400 Baud Rate Communication baud rate is 2400 Communications baud rate is 4800 ON Non critical errors are displayed when set to ON both T4 Error Code Display SF HF errors are displayed Only critical errors are displayed ON B The system broadcasts the time on the communications bus The system does not broadcast the time
25. options is highly recommended Comfort Trend Staging is used by Comfort Zone as an aid to decide if second stage heating or cooling is needed The system must have at least 1 zone with a demand equal to or greater than 2 0 F to allow the use of second stage Comfort Trend looks at the temperature inside the zone and watches the trend over time If the zone demand is being lowered by the first stage operation the second stage is not energized Stage 1 would remain ON and Stage 2 would remain OFF as long as the temperature trend continued to improve Comfort Trend Staging uses a 6 minute timer and a record of the Reference Zone demand to control second stage When Comfort Trend Staging starts the demand in the Reference Zone is recorded and temperature in the zone is continuously monitored If the demand in the Reference Zone is reduced the temperature is approaching the comfort setpoints then the 6 minute timer is 12 restarted and the new demand is recorded If the 6 minute timer expires and the demand is the same or has grown greater the Comfort Zone will start second stage Comfort Trend works for all stages of heating and cooling operation Comfort Trend staging will be used if rotary Position T 8 is turned ON If T 8 is turned OFF then second stage will be energized whenever the Reference Zone demand meets or exceeds 2 0 F and after the 3 minute delay System Mode Reselect allows Comfort Zone to switch between heating an
26. than 100 ft from the Comfort Zone Center as measured along the control voltage wires use 18 AWG colored coded wires to avoid excessive voltage drop wiring is run back to the Comfort Zone Center Keep wires a minimum of 12 in from any AC voltage Do not tie wrap wires together When wiring to the COMM BUS a 3 wire cable must be separate from the 5 wire cable The thermostats should be located approximately 5 ft above the floor and must be located within 200 ft of the Comfort Zone Center SHIELDED CABLE General 1 wiring should be shielded except damper wiring with 18 or 22 gage The 3 wire 5 wire and Remote Sensor wire must be in seperate jacketed cable 2 system wiring must be within 1 building Never connect devices between 2 or more buildings Shielding For A Single Comfort Zone System 1 Fig 17 Shows a Comfort Zone System with all possible options The shield from all devices should be tied together at the I O board and terminated at the shield ground at the lower right hand corner of the board Be sure shielding does not touch any other wiring on the board NOTE Do not connect the shield wire at the device end Cut end and tape up to avoid shorting Shielding For Multiple Comfort Zone Systems 1 If more than 1 Comfort Zone System resides on 1 job they may be tied together for communications purposes If no communications are required then the Comfort Zone System should be wired separate and sh
27. the bypass air must never exceed 25 percent Step 6 Install Duct Temperature Sensor Locate the duct temperature sensor in the main supply trunk after the heating and cooling coil and before the bypass damper and the first branch The duct temperature sensor must be radiant shielded to prevent heat from affecting the correct air temperature 1 Drill a 7 8 in hole at the location in the unit where the sensor will be installed 2 Remove cover and insert sensor probe through the 7 8 in hole 3 Drill two 1 16 in holes to accept No 6 screws through the pre drilled holes in the duct temperature sensor back plate 4 Use the two No 6 sheet metal screws included with the sensor to mount the duct temperature sensor back plate to unit 5 Insert 2 conductor wiring through 1 of the pre drilled holes in side of back plate 6 Connect sensor to 2 wire conductor using wire nuts provided See Fig 16 for connection to Comfort Zone Center Step 7 Install Dx Coil Sensor The Dx coil temperature sensor is recommended for use in heat pump with fan coil applications only The sensor should be installed between the Dx coil and the electric heaters It measures the Dx coil temperature and adds extra protection for high low temperature limits The range is from 30 F to 180 F The Dx coil sensor interfaces to the Comfort Zone Center on terminal TB 1 See Fig 16 To activate the Dx coil temperature sensor Turn T 27 on Step 8 Inst
28. 2 PORT 2 BUILDING GROUND Fig 4 Communication Network With 9250 An ISOSAT 02 CAUTION To prevent possible damage to the Comfort Zone Center do not mount on plenum ductwork or flush against furnace 1 Separate Comfort Zone Center cover See Fig 5 2 Mount the back plate of the center cover to the wall using screws and wall anchors provided 3 Level the back plate and tighten screws Step 4 Install Zone Dampers IMPORTANT If conditions exist for possible condensing the motor must be positioned for adequate draining See Fig 6 Zone dampers may be installed in any direction Position the dampers so that the actuator is visible for inspection and accessible in the event it would ever need to be replaced The black mark on the end of the damper shaft represents the position of the damper NOTE In some areas where excessive condensing may occur carefully insulate over the actuator assembly Make sure insulation does not bind crank arm or interfere with operation of actuator Before insulating the ductwork check for proper damper opera tion Apply 24vac between COM and OP to open the damper and COM and CL to close the damper See Fig 7 COMFORT ZONE CENTER BACK PLATE INTERCHANGEABLE COMFORT ZONE CENTER COVER Fig 5 Comfort Zone Center A9324 DAMPER DAMPER MOTOR WIRE POSITION FOR ADEQUATE DRAINAGE
29. 9 A Jem are 4 ane 1 oe d ir mL 1490F E 0p O 5 CALLOUT TO PHONE PHONE LINE POWER COMM BUS 00002 20000 29990 _ BYXA R BYGWR BYGWR Home Access Module optional Itis recommended that a 5 wire cable be used to install Remote Room Sensors to allow for future upgrade to Smart Sensors Smart Sensor optional optional Smart Sensor Power Pack Fig 16 Comfort Zone System Wiring Diagram 7 A94310 Zone Dampers BYPASS IN IN DOODO 02000500 I pone T LLLI Per COMFORT ZONE I O 24 VAC Transformer Field Supplied 50 VAC req for basic 4 damper system Please see Page 1 Electrical Rating for details 16 AWG to Grounded to Water Pipe or Solid Electrical Ground 9 Power To HVAC System u 80 0 1009 0 Nv3 2 1v3H LM 1v3H ZA 2 1009 LA 1 1009 OWA ve LINN
30. ME PERIOD 4 6 AM TIME PERIOD 1 WRONG 2 AM TIME PERIOD 2 9 PM TIME PERIOD 3 5 PM TIME PERIOD 4 Press the ADVANCE TIME DAY button until the desired start time is diplayed 6 Adjust setpoints Adjust the setpoints using the up and down buttons until the desired temperatures for the selected time period appears in the display These setpoints will be used during the time period currently displayed in the clock window 7 Complete time period programming Repeat 4 through 6 to program remaining weekly period start times Each weekly period can be programmed with 4 differ ent time periods 8 Complete week schedule After completing start time programming press the SELECT MIN HR DAY until MTWTHF reappears in the clock dis play Repeat steps 3 through 7 to program weekly periods Once finished this will complete programming of 1 zone 9 Program a different zone To program a different zone turn the rotary switch to the desired zone to be programmed and repeat 2 through 8 10 Exit program mode Exit program mode by pressing SET SCHED ULES button Overriding Programming To override the time programming press any setpoint button This will also adjust the setpoints for the override period Once the setpoints are adjusted they will not change until the next pro grammed time period for that zone If the HOLD TEMPERATURES button is pressed then the current setpoints will not change with
31. NTROLLER DISPLAY INDICATES ZONE SETPOINTS ZONE TEMPERATURES AND PROGRAMMING INFORMATION AND ALLOWS SETPOINT ADJUSTMENT FOUR ZONE CONTROLLER ZONE 1 ZONE2 ZONE3 ZONE 4 VACATION ZONE SELECTOR DIAL CLOCK DISPLAY INDICATES THE CURRENT TIME AND DAY AND THE START TIMES WEEKLY PERIODS DURING PROGRAMMING TERN SET TIME TEMP SCHEDULES AN HOLD ADVANCE TEMPERATURES o TIME DAY PROGRAMMING ADJUSTMENT BUTTTONS ALLOWS FOR PROGRAMMING WEEKLY PERIODS START TIMES FOR EACH ZONE AND SETS THE CLOCK FOR DAY AND TIME OFF AUTO AUTO OFF AUTO ON OFF HEAT COOL FAN EMERGENCY HEAT 06 SYSTEM SWITCHES PROVIDES FOR SELECTION OF HEAT COOL FAN AND EMERGENCY HEAT OPERATION PROVIDES ACCESS TO INFORMATION AND PROGRAMMING FOR EACH ZONE AND SELECTION OF VACATION MODE OPTION AREA IS FOR USE BY INSTALLATION SERVICE Fig 19 Four Zone Controller Press SELECT MIN HR DAY button once again Press ADVANCE TIME DAY button to scroll to proper hour AM or PM 3 Set the day Press SELECT MIN HR DAY button once again Press ADVANCE TIME DAY button to scroll to proper day 4 Return to normal operation Press SELECT MIN HR DAY button once again The newly programmed time will be displayed Programming Schedules 1 Enter Pro
32. ON and the Fan Switch on the Four Zone Controller is ON Comfort Zone will operate the fan full time Operating the fan continuously will place Comfort Zone in a Float Mode any time no active heating or cooling is taking place During Float Mode Comfort Zone will position the Zone dampers based upon the demand in each zone Comfort Zone will check the air temperature in the ductwork and allow the air into the zones if it will help the zones reduce their individual demands For example if the temperature of the air in the ductwork is 65 F the cooling comfort setpoint for a zone is 72 F and the space temperature is 73 F then Comfort Zone will open the damper servicing that zone and allow the cooler air into the space Ventilation Mode is only in effect when the temperature of the supply air is between 65 F and 80 F Ventilation Mode establishes the minimum position of the zone dampers and is intended to help air movement throughout the zones and reduce the chance of having areas which are stagnant or have high humidities with respect to the rest of the system The changes to the dampers are detailed in the next section Controlling the Zone Dampers CONTROLLING THE ZONE DAMPERS The zone dampers have a total of 16 possible positions or increments which are numbered zero through 15 Position number 0 is fully closed and Position number 15 is fully open While the damper servicing the reference zone remains fully open all other zone d
33. Pilot Duty 24 v coil HN61KK324 or Equivalent STANDARD SINGLE SPEED HEAT PUMP COMFORT ZONE CENTER FURNACE UNIT 24 VAC R Red__________1 R H FA COOL ope doen ee a E ep us zu HEAT1 W _ H 774 we HEAT 2 w2 g e grew Green FAN G e n Orange RV COOL o e ge 19 STANDARD SINGLE SPEED HEAT PUMP COMFORT ZONE CENTER VARIABLE SPEED FURNACE UNIT 24 vac R amp 8 594 R 4 R cooL v HaTi w epe L 7d 1 2 p 1 HEAT2 w2 o op _ _ 1 11 EA Ol Orange 1 vO epe IRRE N RV HEAT 0 62 28 22 ee al 0101 5 Black LE lt I Rt 3 e SQ kyl s s p 4 PS Stal _ 1 CONNECTION AT CONTROL BOARD NOTE Put set up Switch No 2 at the oe board to the ON
34. Ready No correction possible Fatal Error 53 Non Volatile RAM Not Ready No correction possible Fatal Error 22 COMFORT ZONE SYSTEM UNIT 24 VAC R STANDARD SINGLE SPEED AIR CONDITIONER FAN COIL Ea R e c g Yelev gt 5 e e J Blue 9 Se gWe L Li Brown e Green a eg s W3 egpare ape L E COMFORT ZONE CENTER UNIT 24 VAC R R1 Relay DPST Pilot Duty 24 v coil HN61KK324 A 2 SPEED AIR CONDITIONER 38TD FAN COIL 5 Seuss e e e g Ped A mto TE ___ PA So helm Fen D pague L ze 8 Seay H 4 9 4v CALL Black p E e 9 L E A Iva A 5 E iet o THEN RI Latent Capacity Control LCC H Humidistat opens on humidity rise HL38MG026 C or Equivalent COMFORT ZONE SYSTEM UNIT 24 VAC R COOL 1 Y1 COOL 2 HEAT 1 HEAT 2 FAN G 0 0 w1 w1 2 STANDARD SINGLE
35. SPEED AIR CONDITIONER COMFORT ZONE CENTER UNIT 24 VAC R COOL 1 Y1 COOL 2 Y2 HEAT 1 W1 HEAT 2 W2 FAN G RV COOL O OR RV HEAT O Fig 20 Typical Wiring Diagrams Fan Coil with Air Conditioner FAN COIL c e e gRed Se 55 iR Yellow 9 E CES Yi Ol EN Y e gopr S e e 2 Orange on Black e 4 L W3 E B 2 SPEED AIR CONDITIONER 38TD FAN COIL aon N fR gt _____ rat aaa amp pte _ _ l Y Y2 e e CEREREM RUM a B D Orange Sop LE w3 L L L NE fA Y1 D 2 SPEED AIR CONDITIONER 38TD COMFORT ZONE CENTER FAN COIL UNIT 24 VAC R M occum Eig R 1 8 COOL 1 Y1 o GLL_ COOL 2 Y2 e pbue E NU HEAT 1 w1 eye pe he ap Yi HEAT2 W2 e __ FAN G 18 RveHEAT O 4 L L E W3 s E
36. Stages Vs Zone Demand HEATING amp COOLING EQUIPMENT STAGES DEMAND F DEMAND First Stage Cooling 1 5 0 83 Second Stage Cooling 2 0 1 11 First Stage Heating 1 5 0 83 Second Stage Heating 2 0 1 11 Third Stage Heating 2 5 1 39 Fourth Stage Heating 3 0 1 67 Normally Comfort Zone will start equipment operation when it has a demand of 1 5 F or greater In some cases Comfort Zone will be facing a demand greater than 1 5 F when a mode is starting This can occur when the user changes the setpoints in a zone or if a schedule change has reset the Comfort Setpoints NOTE Comfort Zone uses a 3 minute timer to delay the start of second stage heating or cooling This timer is started whenever first stage heating or cooling is energized This delay cannot be overridden or disabled STAGE CONTROL DURING EQUIPMENT OPERATION As shown earlier Comfort Zone has 6 configurable options which help govern the equipment operation They are 1 Comfort Trend Staging Rotary Position T 8 2 System Mode Reselect Rotary Position T 22 3 High Low Temperature Limits Enabled Rotary Position T 10 4 High Temperature Trip Limit Rotary Position S 6 5 Dx Sensor Rotary Position T 27 6 Smart Start Heat Pump Strip Heat Economy Feature Comfort Trend Staging and High Low Temperature Limits control the use of extra stages of heating and cooling Both can be turned off by the installer but the use of these
37. T25 14 Configuration Error 2 Check and correct the configuration 3 Return selection dial to any run mode position 1 Turn selection dial to position T26 and T27 15 Configuration Error 2 Check and correct the configuration 3 Return selection dial to any run mode position 16 Configuration Error Push HOLD button on off 1 Turn the errory display T4 off 7 2 Change any setpoint T6 Current Setpoints 3 Turn the error display T4 on 4 Return selection dial to any run mode position 1 Turn the error display T4 off 2 Turn the selection dial to Vacation 18 Vacation Setpoints 3 Change any setpoint 4 Turn the error display T4 on 5 Return selection dial to any run mode position 1 Turn selection dial to position S 19 Maximum Minimum Temperature Set 2 Change the maximum cooling setpoint 52 be outside 14 range points 3 Change the minimum heating setpoint S3 Must be outside 14 range 4 Return selection dial to any run mode position 1 Turn the selection dial to position S 20 Maximum Minimum Damper Ventila 2 Change the maximum damper position S4 Default 15 tion 3 Change the vent damper position S5 Default 0 4 Return selection dial to any run mode position 1 Turn the selection dial to position 1 21 Bypass Damper Total 2 Re program bypass damper pressure relief limit according to instructions on Programming Sec tion 1 Turn selection dial to position T1 22 Baud Rate 2 Toggle the baud rate twice T3
38. Valid temperature range 30 180 1 Turn selection dial to position 6 07 n Temperature Calibration Out of 2 Change temperature value 9 3 Return selection dial to any run mode position Valid temperature range 30 180 F 1 Turn selection dial to position 7 08 Temperature Calibration Out 2 Change temperature value 9 3 Return selection dial to any run mode position Valid temperature range 30 120 TS 1 Turn selection dial to position 8 09 Bu Temperature Calibration Out 2 Change temperature value 9 3 Return selection dial to any run mode position Valid temperature range 30 180 F 1 Turn selection dial to position S 2 Select variable number 6 10 DAT Error 3 Enter a new value 4 Return selection dial to any run mode position 1 Turn selection dial to position S 11 Device Address Error 2 address of the 4 zone controller is as shown in the Programming and Operation 3 Verify smart sensor address es are as shown in the Programming and Operation Section 1 Turn selection dial to position T2 T11 T12 T18 T20 T22 and T24 12 Configuration Error 2 Check and correct the configuration 3 Return selection dial to any run mode position 1 Turn selection dial to position T4 T5 T6 T13 and T17 13 Configuration Error 2 Check and correct the configuration 3 Return selection dial to any run mode position 1 Turn selection dial to position T7 T8 T9 T10 T19 T21 T23 and
39. Y1 and Y2 contacts are used for the compressor contacts only Comfort Zone operates the heat pumps by energizing the compres sor contacts and controlling the reversing valve through the Reversing Valve RV relay output The W1 and W2 contacts are always used for heat sources These are heating only units such as furnaces strip heaters etc The relay outputs for Comfort Zone 1 4 are shown in Table 4 CAUTION Under no circumstances may the W1 and Y1 contacts on the relay pack be jumpered together This is a common practice for many heat pump installations but will cause improper operation of the Comfort Zone 1 4 or greater system STARTING THE HVAC EQUIPMENT Once Comfort Zone selects a mode the controller will use the configuration options to modify control of the HVAC equipment The controller first selects the number of stages of heating and cooling that may be applied to the building load The available stages are determined by the Reference Zone temperature demand and are shown in Table 5 Using Table 5 if the Reference Zone has a 2 3 F demand then Comfort Zone may use 2 stages of cooling or 2 stages of heating The HVAC equipment may not have 3 stages of heat or even 2 stages of cooling The table is only used to determine what equipment Comfort Zone is allowed to turn on at any given time during a heating or cooling cycle Actual operation of the stages depends on other variables as well Table 5 HVAC Equipment
40. all Four Zone Controller The Four Zone Controller this is the zone 1 thermostat is typically located in the zone that represents the most occupied area of the house i e living room family room etc DO NOT locate the controller where the supply air can blow directly on it Avoid locating the controller where heat from any lamps appliances or direct sunlight will affect the temperature sensor on the controller Do not locate on an outside wall or next to a return air grill 1 Separate base plate from main body of controller 2 Pull 3 wire cable for communication bus and 5 wire cable for controller through 3 4 in round hole on base plate Three wire cable and 5 wire cable must be separate jacketed wiring Do not use one 8 wire cable See Fig 18 NOTE Insulate or seal field wiring feed through hole to reduce draft 3 Mount base plate using screws provided starting screw in round hole first then second screw in slotted hole On drywall it is recommended to use plastic wall anchors provided NOTE If you are mounting the controller using an electrical box mount the base plate using the pair of horizontal holes 4 Level base plate and tighten screw in slotted hole first then the screw in round hole 5 Connect the 3 wires for communications bus and the 5 wires for controller to base plate terminal screws See Fig 16 Ensure that there are no excess or bare wires exposed 6 Plug base plate connector into back of
41. ammable Options Settings DUM SETTING NAME VALUE 5 1 4 Zone Controller Bus Address 4 64 4 5 2 Maximum Cooling Setpoint 80 95 85 5 3 Minimum Heating Setpoint 34 64 65 S 4 Maximum Damper Position 8 15 15 5 5 Ventilation Minimum Damper Position 0 7 0 S 6 High Temperature Trip Limit 105 155 105 S 7 Dual Fuel Setpoint 0 or 10 60 0 1 Zone Controller Bus Address S 1 This setting establishes the identity of the 4 zone controller on the Carrier communications bus NOTE Remote room sensors do not require addressing If using optional Smart Sensors they must be addressed as follows ZONE 1 Address of 4 zone controller ZONE 2 Address must be 1 less than zone 1 ZONE 3 Address must be 2 less than zone 1 ZONE 4 Address must be 3 less than zone 1 To set address of a Smart Sensor rotary switch position 1 on the Smart Sensor must be selected first 2 Maximum Cooling Setpoint S 2 This is the highest temperature value to which the cooling setpoint can be adjusted All zones will use the same value The maximum cooling setpoint can be programmed from 80 F to 95 F This allows cooling setpoints to be programmed above the normal range Example Maximum cooling setpoint is programmed at 92 F The temperature range for the cooling setpoint is 70 F to 84 F When the COOL setpoint up button is pressed to adjust the cooling setpoint above 84 F the setpoint will jump to 92 F 3 Minimum Heating Setpoi
42. ampers are positioned by selecting a position equal to the demand of the space in tenths of a degree See Table 2 Table 2 Zone Damper Positions Damper Position Versus Zone Demand DAMPER POSITION DEMAND DEMAND 0 Fully Closed 0 0 1 0 1 0 06 2 0 2 0 11 3 0 3 0 17 4 0 4 0 22 5 0 5 0 28 6 0 6 0 33 7 0 7 0 39 8 0 8 0 44 9 0 9 0 50 10 1 0 0 55 11 1 1 0 61 12 1 2 0 67 13 1 3 0 72 14 1 4 0 78 Fully 15 0 83 For example a zone which has a 1 0 F demand will have the damper set to position number 10 while a zone which has a demand of 0 5 F will have the damper set to position number 5 A demand of 0 zero will fully close the zone damper Any zone which has a demand greater than 1 5 F will remain fully open 10 Notice that the positions are based upon tenths of a degree Fahrenheit If Comfort Zone has the Celsius Temperature Display option rotary position T 2 turned on the damper control is still based upon the Fahrenheit scale The damper positions in the table are also used during a Float Mode A zone with a demand of 0 5 F will be set to position number 5 The actual control of the zone dampers by the Comfort Zone system can be modified using 3 configurable options These are Maximum Damper Position Minimum Damper Position and Ventilation Mode These options apply to all zone dampers simultaneously Any dampers servicing Zone 1 cannot be configured di
43. and 21 FAN COIL WITH AIR CONDITIONER Indoor Unit Fig 20 FA4A FB4A FK4A FK4B FC4B Single Stage Air Conditioner 6 Two Speed Air Conditioner ct d E FURNACE WITH AIR CONDITIONER INDOOR UNIT FIG 21 58WAV 587 58PAV 58RAV 585 58DXC 58EJA 58MXA 58MCA A B B B C C 58PAP 58RAP 58GFA 58DFA 58EFA 58SXA 58DXA Outdoor Unit 58TUA 58VUANCA 58TMA 58MVP Single Speed Air Conditioner Two Speed Air Conditioner DE Ft H KGATT0101VSP Optional Two stage relay kit may help to control over conditioning T KSAIF01012SP B Furnace Interface Kit This is required to allow 2 speed outdoor units to select indoor airflow Latent capacity control Required field supplied See 2 speed Installation Instructions Table 8 Wiring Diagram Reference For Fig 22 and 23 FAN COIL WITH HEAT PUMP Indoor Unit Fig 22 OUTDOOR UNIT Ti FK4A FK4B FC4B le oe 8 Heat Pump P E FURNACE WITH HEAT PUMP INDOOR UNIT FIG 23 58WAV 58PAP 587 58RAP 58PAV i 58GFA 58RAV Outdoor Unit 58DFA 585 58MVP 58EFA 58DXC 58SXA 58DXA 58MCA Single Speed Epi Heat Pump B Two Speed puo Heat Pump ECT Gt Ht KGATT0101VSP Optional Two stage relay kit may help to control over conditioning T KSAIF01012SP B Furnace I
44. ated by the HVAC equipment must equal the tonnage placed into the zones If the zone s airflow decreases the cooling equipment will tend to drive down the supply air temperatures Conversely the heating equipment will tend to drive up the supply air temperatures With High Low Temperature Limits turned ON Comfort Zone will detect this condition and take corrective action The first step taken by Comfort Zone will be to start turning off extra stages of equipment this will continue until either the Leaving Air Tem peature problem is corrected or the system is operating on first stage heating or cooling only If the system is operating on first stage heating or cooling Comfort Zone will begin to gradually open zone dampers This can continue until the system has become a fully open constant volume system if needed The objective is to provide the required heating or cooling as best as possible prior to shutting off the equipment In practice the control tends to match the equipment capacity to the zone demands and will seldom revert back to a fully open system The Leaving Air Temperature control can also indicate problem zones within a system which are not receiving sufficient airflow If 1 area or zone within a building has difficulty becoming satisfied then there may be a sizing problem or an obstruction in the ductwork supplying that zone To use the Leaving Air Temperature Control 3 options must be setup properly They are 1 High
45. ation Mode OFF T26 Two Stage Heat Pump OFF T27 Dx Sensor For LAT Checking OFF T28 Cool Without Fan OFF SETTING S 1 4 Zone Controller Bus Address 04 S 2 Max Cooling Setpoint 85 5 3 Min Heating Setpoint 65 5 4 Damper Position 15 S 5 Ventilation Damper Position 00 S 6 High Temp Trip Limit 105 S 7 Dual Fuel Setpoint 00 ROTARY 09 Base Temp Setpoint Scale 08 Calibrate Dx Coil Sensor 07 Calibrate Outside Air Temp Sensor 06 Calibrate Duct Temperature Sensor 05 Calibrate Zone 4 Temp Sensor 04 Calibrate Zone 3 Temp Sensor 03 Calibrate Zone 2 Temp Sensor 02 Calibrate Zone 1 Temp Sensor 01 Damper Service Position 33 34 35 Copyright 1994 CARRIER Corp 7310 W Morris St Indianapolis IN 46231 49002c Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 11 11414 pc 101 Catalog No 809 552 Printed in U S A Form 920415 3SI Pg 36 9 94 Replaces 920415 251 Tab 3a 5a 2a
46. ature Sensor Bad sensor shorted or open 1 Check wiring and sensor 2 Replace failed sensor if necessary Valid temperature range 30 120 F 46 Dx Coil Sensor Bad sensor shorted or open 1 Check wiring and sensor 3 Replace failed sensor if necessary Valid temperature range 30 180 F 47 Bus Access Error Controller can not communicate on bus 1 Check 3 wire bus between controller and comfort zone center 2 Replace faulty controller center boards if necessary 48 Zone 2 Smart Sensor Cannot communicate with zone 2 smart sensor 1 Turn toggle 13 off if there is no smart sensor attached to zone 2 2 Check wiring between sensor and comfort center 3 Verify correct address 4 Must be addressed 1 less than 4 zone controller s address 49 Zone 3 Smart Sensor Cannot communicate with zone 3 smart sensor 1 Turn toggle 14 off if there is no smart sensor attached to zone 3 2 Check wiring between sensor and comfort center 3 Verify correct address 4 Must be addressed 2 less than 4 zone controller s address 50 Zone 4 Smart Sensor Cannot communicate with zone 4 smart sensor 1 Turn toggle 15 off if there is no smart sensor attached to zone 4 2 Check wiring between sensor and comfort center 3 Verify correct address 4 Must be addressed 3 less than 4 zone controller s address 51 Clock Not Ready No correction possible 52 Parker Custom Chip Not
47. ct temperatures sensor The low temperature trip limits are 50 F turn off second stage cooling and 45 F turn off first stage cooling and cannot be changed The second stage high temperature trip limit can be pro grammed from 105 F to 155 F If a value of 105 to 110 is selected second stage heating is turned off at this value then the first stage high temperature trip limit is the programmed value plus 5 F first stage is turned off If a value of 111 to 155 is selected second stage heating is turned off then the first stage high temperature trip limit is the programmed value plus 20 F first stage is turned off Example 1 High temperature trip limit selected is 105 F Shown as 05 in controller display Second stage heat will turn off when the duct temperature sensor measures a temperature greater than 105 F First stage heat will turn off when duct temperature sensor measures a temperature greater than 110 F Example 2 High temperature trip limit selected is 140 F Shown as 40 in controller display Second stage heat will turn off when the duct temperature sensor measures a temperature greater than 140 F First stage heat will turn off when duct temperature sensor measures a temperature greater than 160 F 7 Dual Fuel Setpoint S 7 This option is used with a system that has a heat pump and another heat source possibly gas that should not run at the same time as the heat pump When any heat pump is on
48. d 4 Insulate damper using 1 1 2 in to 2 in insulation Check your local codes 1 2 STEEL STRAP rd Fig 9 Insulated Round Metal Ductwork NOTE All zone dampers and ductwork must be properly sup ported according to local codes or SMACNA standards RECTANGULAR METAL DUCTWORK 1 Make connections using S lock and drives See Fig 10 2 Properly seal joint using duct tape mastic or other approved method 3 Insulate damper using 1 1 2 in to 2 in insulation Check your local codes NOTE All zone dampers and ductwork must be properly sup ported according to local codes or SMACNA standards NOTE There should be a minimum of 4 ft between the zone damper and the first branch duct if more than 1 branch duct is downstream of the zone damper ROUND FLEXIBLE DUCTWORK 1 Slip 1 end of flexible ductwork over 1 end of zone damper See Fig 12 2 Secure the flexible duct to zone damper using SMACNA or other approved method S LOCK 2 SUPPLY AIR DUCT N DRIVE 2 DAMPER 92478 Fig 10 Rectangular Metal Ductwork 112 2 INSULATION A92483 Fig 11 Insulated Rectangular Metal Ductwork FLEXIBLE ZONE DUCT DAMPER E A92479 Fig 12 Round Flexible Ductwork 3 Properly seal joint using duct tape mastic or other approved method 4 Insulate damper using 1 1 2 in to 2 in insulation
49. d cooling even if the current system demand has not been satisfied For example if Comfort Zone is providing heat System Mode Reselect allows Comfort Zone to look at any cooling needs which may also exist in the building If the cooling demand exceeds the heating demand for 20 minutes Comfort Zone will stop providing heat and switch into a cooling mode Once the cooling demand is satisfied or System Mode Reselect dictates a switch Comfort Zone will revert to a heating mode in order to try and satisfy that demand The need for System Mode Reselect usually indicates some type of system problem Common use of System Mode Reselect may be caused by poor or improper ductwork open windows or doors HVAC equipment failure improper equipment sizing etc The need for System Mode Reselect usually occurs in larger installa tions where the zone use or occupancy may vary widely For residential application the need for System Mode Reselect is normally not frequent unless the building has unusual architectural features or problems with the HVAC system High Low Temperature Limits is an option that allows Comfort Zone to control equipment stages and position dampers based upon the temperature of the supply air leaving the HVAC equipment As the Comfort Zone system operates through a heating or cooling cycle the zone demands and damper positions will change This changes the actual tonnage or BTUH that is applied to the HVAC equipment The tonnage gener
50. eat Pump On On O F off Off Heat Pump Furnace Dual On Off 10 to 60 F Off Fuel Two Stage Heat Pump Furnace Dual Fuel On On or on Furnace Heat Only Off Off O F off On or Off Strip Heater Only Off Off O F off Off Refer to the 2 speed heat pump Installation and Start Up Instructions for details regarding 2 speed heat pump operation It is recommended that the heat pump control board controls the operation of this equipment and not Comfort Zone Table 4 Available Heating and Cooling Stages Vs System Type TYPE OF HVAC EQUIPMENT USED COOLING STAGE 1 COOLING STAGE 2 HEAT STAGE 1 HEAT STAGE 2 HEAT STAGE 3 HEAT STAGE 4 Cooling Only any Heater Type Y1 Y2 W1 w2 Single Stage Heat Pump Y1 Y1 w1 w2 Two Stage Heat Pump Y1 Y2 Y1 Y2 W1 W2 For cooling applications the second stage of an air conditioner is not necessarily more expensive to operate than the first stage But additional cooling can drive down the efficiency of a 2 speed air conditioner and longer use of the first stage alone tends to deliver better humidity control in moist climates Again because of these advantages Comfort Zone will attempt to minimize the use of second stage cooling This is not as great of a concern for a heating application due to the fact that the majority of small air condi tioning systems sold today 5 tons and below are single stage cooling only CONFIGURATION OPTIONS FOR EQUIPMENT OPERA TION Com
51. eft hand setpoint buttons will toggle the zone number 1 4 and 5 NOTE No 5 not used for damper service mode see below for details when setting the motorized bypass damper pressure relief limit When this mode is selected all 4 zone dampers are activated and opened to position 15 See Table 2 Fan will energize Use the right hand setpoint buttons to toggle down from position 15 to position 0 This feature can verify that each zone damper is operating properly by manually opening and closing each zone When the rotary switch dial is moved onto another position the Damper Service Mode will be cleared and controller will resume normal operation Bypass Damper Pressure Relief Limit We do not encourage using a motorized bypass damper Using a barometric bypass damper is the preferred method to control the operating pressures in the supply duct The display shows the zone number in the upper left digits and the lower right digits show the damper position The left hand setpoint buttons will toggle the zone number 1 4 and also to 5 where the collective damper position is programmed in for the bypass When it is toggled to position 5 and the annunciator is toggled from OFF to ON with the right hand buttons the controller totals all of the dampers positions and stores it While displaying 1 4 the damper for that zone can be directed to any position with the right hand buttons The collective damper position that is programmed at positio
52. en using Two Stage Relay Kit 0101 5 Accessory Optional STANDARD 2 SPEED ASIE ORBE AIR CONDITIONER 38 0 COMFORT ZONE CENTER VARIABLE SPEED COMFORT ZONE CENTER FURNACE FURNACE ec Hed UNIT 24 VAG 67518 59 ranted ccs UMEN UNIT 24 VAC R l 2 18 pet 1 Y2 cooL v e pelo 4 D a p Bue i Bue 6 COOL 2 Y2 e ep COOL 2 Y2 ER ls es IX HEAT1 W 66 oe secs all Ww HEAT1 W 5 1 HEAT 22 a opp O HEAT2 W2 gt ANS 5 11 1 24 FAN G agp O Orange F 4 16 apr w2 RV COOL ep 6 9 e Black L3 oR O ED Blade S _ epo Y1 RV HEAT 0 6 609 1G NOTE Locking furnace into fire may help prevent over conditioning in the heating mode This will allow the furnace to stage between low and high fire Before using this feature read furnace Installation Instructions for two stage operation Connect W2 from the D Comfort Zone Center to W2 on the furnace control board See Furnace Installation Instructions For Details Involving Set Up Switch Configuration and Two Stage Furnace Operation C Fig 21 Typical Wiring Diagrams Furnace with Air Conditioner 25 COMFORT ZONE CENTER VARIABLE SPEED 2 SPEED AIR CONDITIONER 38TD S
53. ergency heat whenever a large heating demand occurs due to a scheduled setpoint change Smart Start looks at the scheduled comfort setpoints for the next hour If the scheduled setpoints will make the system provide heat the Smart Start will start the heat pump an hour early Smart Start will operate until the zone demand is brought within 0 5 F 0 28 C of the next hour s heat setpoint or the setpoints change due to the schedule the hour expires Smart Start assumes the auxiliary heat is more expensive to operate when compared to the heat pump and it assumes that the heat pump is a relatively slow source of heat Smart Start allows a zone to recover from a setback or unoccupied period and use the most economic source of heat in doing so The idea of using a setback or unoccupied schedule is to save money in operating costs There is little incentive to use schedules if the zone is heated with the most expensive source of heat available Step 11 Configuring Four Zone Controller PROGRAMMABLE OPTIONS SETTINGS Turn the zone selector dial to position S See Fig 19 The controller display shows the setting number and its value 13 The upper 2 digits show the settings number and the lower 2 digits show the value of the setting Press the COOL up or down setpoint buttons to change the setting number and the HEAT up or down setpoint buttons to change the value Refer to Table 6 for the settings and their definitions Table 6 Progr
54. fferently than those servicing Zone 2 The options are as follows 1 The Maximum Damper Position rotary position number S 4 sets the maximum open damper position for all 4 zones The allowable range for this option is damper positions number 8 through number 15 fully open The factory default is 15 The only time the zone dampers will exceed this position is if the system fan is off or the zone dampers are being calibrated 2 The Minimum Damper Position rotary position number S 5 sets the minimum open damper position for all 4 zones The allowable range for this option is damper positions number 0 through number 7 The factory default is number 0 fully closed If Ventilation Mode rotarty position T 25 is turned OFF then the minimum damper position will be an absolute minimum regardless of the operating mode If Ven Mode is turned ON then the minimum damper position will be the minimum position during a Ventilation Mode only and the dampers will be allowed to fully close at any other time 3 Ventilation Mode rotary position T 25 If Ventilation Mode is turned ON then any time the air inside the supply air ductwork is between 65 F and 80 F the system will be in a Ventilation Mode During a Ventilation Mode all zone dampers will have a minimum position which is set by the Minimum Damper Position rotary position S 5 The zone dampers are not allowed to fully close as long as the supply air temperature remains w
55. fort Zone has several configurable options which allow it to control different types of HVAC equipment and change the manner in which the equipment is controlled This first group must be set given the type of HVAC equipment installed These include 1 Heat Pump Operation Rotary Position T 6 2 Two Stage Heat Pump Rotary Position T 26 3 Dual Fuel trip temperature Rotary Position S 7 4 Auto Fan Off For Heat Rotary Position T 9 The second group modifies the way the HVAC equipment is controlled These include 1 Comfort Trend Staging Rotary Position T 8 2 System Mode Reselect Rotary Position T 22 3 High Low Temperature Limits Enabled Rotary Position T 10 4 High Temperature Trip Limit Rotary Position S 6 11 number of heating stages that it will actually control and which relay outputs will be used to control each stage of heat Comfort Zone can control up to 4 stages of heat depending upon the system configuration For cooling only applications with any type of heater Comfort Zone will only control 2 stages of heat If the system uses a heat pump then Comfort Zone will control 3 stages of heat The additional stage is the heat pump compressor contact The auxil iary heat is still 2 stages If the system uses a 2 stage heat pump then Comfort Zone will control 4 stages of heat Two stages for the heat pump and 2 stages for auxiliary heat The Comfort Zone Relay Pack outputs are shown in Table 4 The
56. g the system fan or the heating cooling equipment The intent is to provide the HVAC equipment with unrestricted ductwork and reduce pressure surges Comfort Zone also fully opens the dampers whenever a heating or cooling cycle is completed and the system fan is shutting down If the Fan Switch on the Four Zone Controller is set to Auto then all the zone dampers will remain fully open until the next heating or cooling cycle The other reason for opening the dampers is to provide unrestricted ductwork to other equipment which is not directly controlled by Comfort Zone One example may be Heating Recovery Ventilator If Comfort Zone is not actively controlling the HVAC system then it must not impose any control influences i e closed zone dampers on the system and prevent proper operation of other devices For Fan operation the switch settings on the Four Zone Controller and the system configuration can change the actual operation If the Auto Fan Off For Heating option Rotary switch position number T 9 is ON then Comfort Zone will only energize the fan for cooling cycles This option is intended for furnaces which will control their own fan internally If the Fan Switch on the Four Zone Controller is set to ON instead of Auto then the system fan will run continuously Any time Comfort Zone is operating the fan it will be in active control of the system NOTE If the Auto Fan Off For Heating option rotary switch position T 9 is
57. gram Mode Press SET TIME TEMP SCHEDULES button to enter pro gram mode The program mode and the current zone will be shown on the controller display 2 Select a zone Turn the rotary switch to the zone to be programmed 3 Select a weekly period The clock display will show MTWTHF Pressing the ADVANCE TIME DAY button selects the weekly period to be programmed Pressing the button 1 time will change the clock display to SA A second press will change display to SU A third press return the displays to MTWTHF 4 Program time periods There are 4 start times that can be programmed in each weekly period Press the SELECT MIN HR DAY button to program the start times for the selected weekly period Pressing the SELECT MIN DAY HR button once shows the first program start time on the clock display and the setpoints with the word PROGRAM for this start time on the controller display Additional presses display start times 2 3 4 and then back to weekly period display 16 NOTE While in program mode if a period of 4 1 2 minutes passes without a change to some value the controller will return to normal operation 5 Program start time NOTE Start times must be programmed in chronological order and must be in the same day Any times before the previous time period will be ignored In the WRONG example below periods 2 and 4 will be ignored RIGHT 6 AM TIME PERIOD 1 8 AM TIME PERIOD 2 5 PM TIME PERIOD 3 9 PM TI
58. he space temperature in a zone rises above the cooling setpoint then that zone needs to have heat removed from the zone which will lower the space temperature back to the cooling setpoint For example if the cooling setpoint is 76 F and the space temperature is 77 F the space temperature must be lowered 1 in order for the zone to be satisfied In this case the cooling demand for the zone is 1 F 77 F minus 76 F Comfort zone allows the owner or installer to set ranges for the comfort setpoints along with the maximum and minimum tem peratures which can be used by the system Comfort zone allows both the heating and cooling comfort setpoints to operate in a 14 9 span The heating and cooling temperature spans can be set to allow for a selected range of operation Rotary switch position 9 sets the base temperatures for both the heating and cooling spans When the switch is set to 9 both the heating and cooling base temperatures are displayed and each can be modified by using the up down setpoint buttons The base temperatures are the same for all 4 zones If the cooling base temperature is set to 68 F then the cooling comfort range will be 68 F to 82 F If the heating base temperature is set to 54 F then the heating comfort range will be 54 F to 68 F Zone Dampers
59. ielded as previously stated 2 When 2 to 4 systems are on 1 job and require communications they should be daisy chained together through the 3 wire communications bus at the COMM BUS HAM terminal The shielding should only be grounded at 1 point on the end of the communications bus as shown in Fig 2 SHIELD DRAIN WIRE Comfort Comfort Comfort Zone NOTE 1 7 2 SHIELD DRAIN WIRE Comfort NOTES 1 Use butt splices or solder for shield connections Then tape up shield 2 Do not connect the shield drain wire at the end of Communication Bus Cut and tape up to avoid shorting Fig 2 Daisy Chained Comfort Zone Systems 3 If more than 4 systems are used on 1 job multiple device buses must be used Each device bus must be separated by an ISOSAT 01 typical arrangement is shown in Fig 3 Communications Bus Guidelines for Maximum Number of Devices 1 The maximum number of Comfort Zone Systems allowed on 1 device bus is 4 2 Four Zone Controllers must be addressed 4 addresses apart example 4 8 12 16 for a device bus with 4 Comfort Zone Systems 3 Home Access Module optional will scan a maximum of 4 Comfort Zone Systems 4 Multiple device buses can be tied together for communications via ISOSAT 01 An ISOSAT 02 is required for remote or direct communications via personal computer or modem See Fig 4 5 Comfo
60. iring Diagrams Fan Coil with Heat Pump 28 2 SPEED HEAT PUMP 38YD COMFORT ZONE SYSTEM FAN COIL UNIT 24 Red JRH R Y peri gBue ES HEAT 1 W1 ao gWhite_____ roc Y1 HEAT 2 W2 ep En mv _____ RV co0L 2 geane RV HEAT OC 19 _ Nro L L w3 W3 E lt E Fig 22 Typical Wiring Diagrams Fan Coil with Heat Pump Continued 29 STANDARD SINGLE SPEED HEAT PUMP COMFORT ZONE CENTER VARIABLE SPEED FURNACE UNIT 24 R 675 ates 4 TRH 4 1 668 1819 COOL 2 Y2 rire 1 ge ate 1 2 HEAT 2 42 68 819 6 FAN G opos Dre a posso A Black es ORT 4 REATO 2678 o pps q 101 1 1 m L O R1 Relay DPST
61. ithin the 65 F 80 F range If the supply air temperature falls outside the 65 F 80 F range then the zone dampers may fully close NOTE If the Ventilation Mode option rotary position T 25 is turned ON and the Minimum Damper Position rotary position 5 is set to position 0 there is no difference between Float Mode and Ventilation Mode In other words the Ventilation Mode option has no effect on the system OPERATING THE HEATING AND COOLING EQUIPMENT Before any heating or cooling equipment is started Comfort Zone must first choose between heating or cooling For most of the year there is little question as to the need for heat or cooling But for portions of the year particularly during mid season a building may have simultaneous needs for both heating and cooling The first step in selecting heating or cooling is the determination of a Reference Zone If there is a single zone which has the greatest demand then it will become the Reference Zone and Comfort Zone will start the equipment based upon the needs of that zone If 2 zones have the same greatest demand but in different modes 1 needs heating and the other needs cooling then Comfort Zone will select the mode which has the greatest number of zones which require the same mode CONTROL STRATEGY FOR HEATING COOLING STAGES The Comfort Zone system will attempt to minimize the use of additional stages of heating or cooling equipment In an ideal case the building conditio
62. main body and ensure it is secure into connector located on the back of the 4 zone controller s main body Ensure connectors and main body are secure 7 Align main body with base plate and snap into place Step 9 Install Remote Room Sensors or Smart Sensors Optional Comfort Zone may have up to 4 zones The Four Zone Controller controls zone 1 Remote room sensors or smart sensors control the other 3 zones If using a smart sensor a smart sensor power pack must be used The remote sensors should be located 5 ft above the floor and must be less than 200 ft away from the Comfort Zone Center DO NOT locate the sensors where the supply air can blow directly on them Avoid locating the sensors where heat from any lamps appliances or direct sunlight will affect the temperature sensor on the room sensors Do not locate on an outside wall or next to a return air grill 1 Separate the 2 parts of the sensor and mount back plate with flat head screw provided 2 Pull a 2 wire conductor through hole on right hand side 3 Connect black or white wire to terminal labeled B and connect red wire to terminal labeled 4 Align sensor case with base plate then press firmly until the cover snaps into place Step 10 Sequence of Operation TEMPERATURE SETPOINTS The Comfort Zone System uses 2 temperature setpoints The setpoints are displayed in the left hand window on the Four Zone Controller See Fig 19 The temperature setpoint
63. mate control depending upon the day of the week and time of each day Each zone can be programmed independently See Table 9 NOTE zones must be programmed Table 9 Example Weekly Schedule WEEKDAYS SATURDAY SUNDAY 6 AM 72 70 7 72 68 8 72 70 8 85 65 10 85 65 10 85 65 5 PM 70 68 2 PM 70 68 7 PM 70 68 10 PM 85 65 11 PM 85 65 10 PM 85 65 WEEKLY PERIOD Cooling Setpoint Heating Set point Start Time Vacation Mode Vacation mode displays the current vacation temperature setpoints and allows the adjustment of these setpoints using the setpoint buttons These setpoints are used by all zones until the selector dial is returned to 1 of the zone selection positions At all times the setpoints displayed will be the temperature range that the system will maintain This mode can also be used to maintain the entire home at 1 constant temperature typically when unoccupied NOTE If the Fan Switch is set to ON the fan will continue to run in vacation mode To enter vacation mode turn the selector dial to VACATION The word VACATION will appear on the controller display when ever the system is in this mode Set vacation mode setpoints Setting The Clock The clock display will normally show the hour minutes AM or PM and the day 1 Set the minutes Press SELECT MIN HR DAY button once Press ADVANCE TIME DAY button to scroll to proper minutes 2 Set the hour CO
64. mbers Keep list for your future use 8 Instruct the owner to turn the cool switch OFF in the fall and turn it ON in the spring 9 Make sure the emergency heat switch is in the OFF position If a gas furnace is used this switch should never be turned on It is for heat pumps only 10 Be sure and set the clock to the correct time of day You only need to do this when you first power up the system or after a power outage lasting longer that 8 hours 11 Go to rotary switch setting 2 on the four zone controller Check calibration of room sensor Do the same for zones 2 3 and 4 rotary switch 3 4 5 Sensors must be calibrated 12 Instruct owner in operation of Comfort Zone System 13 Instruct owner to call 800 number supplied with Comfort Zone Center to receive free How to use Comfort Zone video tape 14 For toggle settings for configuration see Programmable Toggles and Options and Table 9 Step 14 Programming Schedules The four zone controller is the program center for your Comfort Zone System The Four Zone Controller provides the ability to program the system for the unique demands of each zone at different times during the day and week See Fig 19 to become familiar with the various parts of the Four Zone Controller SYSTEM SWITCHES System switches select the desired equipment operation Heat Switch OFF Heat will not come on AUTO Heat will come on when any zone is more than 1 5 F below the desired heat
65. n 5 is the minimum total damper open position The largest minimum open position is 60 4 zones with 15 positions each Whatever number is programmed in will be the minimum total damper open positions that the bypass will try to maintain The bypass damper positions are 1 for every 3 that the total needs Example The maximum total is 60 but only 3 dampers are open This is only 45 so the bypass takes 60 subtracts 45 comes up with 15 and divides this number by 3 The result is 5 so the bypass goes to position 5 Step 15 Accessories Refer to the individual instructions packaged with the kits or accessories when installing HOME ACCESS MODULE The Home Access Module HAM is designed to detect Comfort Zone System errors The HAM can report when the system is operating correctly or when an error is detected The can automatically call an ACS dealer or the ACS National Response Center NOTE The HAM must be programmed via Report Logger or PC Command Center Software prior to installation SMART SENSOR AND SMART SENSOR POWER PACK NOTE These 2 accessories must be used together The Smart Sensor provides the ability to view and adjust the setpoints in the zone where the sensor is located The Smart Sensor replaces a Remote Room Sensor and requires a single 5 wire conductor instead of a 2 wire conductor OUTSIDE AIR DAMPER The outside air damper allows fresh outside air into the building OUTSIDE AIR TEMPERATURE SENSOR
66. n the type of heater used in the system This is for the final heat source So a heat pump with strip heat would use a temperature appropriate for the strip heaters A furnace application may have a setting in the 130 F to 155 F range Strip heaters may fall into a 115 F to 130 F range Heat pump only systems may use 105 F to 115 F Check the equipment manufacturer recommendations and verify the setting is in accor dance with UL NFPA or any applicable Local or State Building Codes If there is any question about what may be an appropriate temerature setting use conservative low temperatures Dx Coil Sensor For Leaving Air Temperature Rotary Position T 27 allows Comfort Zone to use a DX Coil Sensor in addition to the Remote Duct Sensor for Leaving Air Tempeature Checking The DX Coil Sensor is used in heat pump with fan coil applica tions and will be located after the dx coil and before to any strip heaters This sensor is only active during heat pump operation The temperature setting for this sensor is fixed at 105 F for initiating the control option and 110 F for shutting down first stage Heat Pump Strip Heat Economy Feature Smart Start This is an automatic control within Comfort Zone and not a selectable option The Smart Start feature is used whenever the primary source of heat is a heat pump As such the Heat Pump toggle Rotary Position T 6 must be turned ON Smart Start is designed to help minimize the use of strip heat or em
67. ne Center to W2 on the furnace control board See Furnace Installation Instructions For Details Involving Set Up Switch Configuration and Two Stage Furnace Operation 38YDA with dual fuel same as above however in addition if T 26 is turned ON and stage 2 latch pot is set to zone position 4 stages of heat are possible See Heat Pump Installation Instructions For Details Involving Two Speed Configuration and Operation Fig 23 Typical Wiring Diagrams Furnace with Heat Pump Continued 32 Comfort Zone Configuration Table FACTORY RECORD TOGGLE DESCRIPTION DEFAULT JOB SETTING T1 Timeguard Override OFF T2 Celsius Temperature Display OFF T3 2400 Baud Rate ON T4 Error Code Display ON T5 Enable Broadcast ON T6 Heat Pump Operation OFF T7 Outside Air Temp Sensor Attached OFF T8 Comfort Trend Setting ON T9 Auto Fan Off For Heat OFF T10 High Low Temperature Limits ON T11 Installer Switch Lockout OFF T12 Force Outside Air Ventilation OFF T13 Smart Sensor Attached For Zone 2 OFF T14 Smart Sensor Attached For Zone 3 OFF T15 Smart Sensor Attached For Zone 4 OFF T16 Zone 2 Active ON T17 Zone 3 Active ON T18 Zone 4 Active ON T19 Economizer OFF T20 Alternating Display OFF T21 Outside Air Damper Attached OFF T22 System Mode Reselect OFF T23 System Error Checking OFF T24 50 Hz Operation OFF T25 Ventil
68. ning needs can be supplied by first stage cooling or first stage heating alone For most heat pump applications there may be only 2 or 3 stages of heat depending upon the type of emergency heater present For a heat pump the secondary heat source will generally be an electric strip heater The electric strip heat is much more expensive to operate when comparing the cost per unit of heat Because auxiliary stages of heating tend to be more expensive to operate Comfort Zone attempts to keep the number of stages at a minimum 5 Dx Sensor Rotary Position T 27 6 Smart Start Heat Pump Strip Heat Economy Feature The first options which must be set are based upon the type heater or heaters used These are shown in Table 3 The only option which appears to impact cooling operation is Two Stage Heat Pump which implies the availability of 2 stages of cooling In reality there are no changes to the cooling control scheme Comfort Zone assumes that there are always two stages of cooling present These are connected to the Comfort Zone Relay Pack on the Y1 and Y2 contacts RELAY PACK TO HVAC EQUIPMENT CONNECTIONS Given the system configuration Comfort Zone can determine the Table 3 Heating System Option Vs Type of Heater Used FAN ON HEAT PUMP TWO STAGE DUAL FUEL DERT ESTEM SYSTEMTOGGLE HEAT PUMP SYSTEM SWITCH FOR ange T 6 TOGGLE T 26 S 7 T 9 Single Stage Heat Pump On Off O F off Off Two Stage H
69. nt S 3 This is the lowest temperature value to which the heating setpoint can be adjusted All zones will use the same value The minimum heating setpoint can be programmed from 34 F to 64 F This allows heating setpoints to be programmed below the normal range Example Minimum heating setpoint is programmed at 56 F The temperature range for the heating setpoint is 66 F to 80 F When the HEAT setpoint down button is pressed to adjust the heating setpoint below 66 F the setpoint will jump to 56 F 4 Maximum Damper Position S 4 This is the highest open position to which a damper will change Full open is designated as position 15 Maximum open damper position can be programmed between 8 half open and 15 in increments of 1 All zone dampers will use the same programmed maximum value 5 Ventilation Minimun Damper Position S 5 When there is no demand for cooilng or heating this is the minimum position that every zone damper will maintain as long as the air temperature in the ductwork is between 65 F and 80 F Full closed is designated as position 00 Minimum open damper position can be programmed between 7 half open and 00 in increments of 1 All zone dampers will use the same programmed ventilation value 6 High Temperature Trip Limit S 6 The trip temperatures limits are the duct temperatures used to turn the HVAC equipment off to prevent damage to the equipment Temperature values are measured by the du
70. nter is receiving 24 vac 50 va minimum required with motorized dampers 5 va for each additional motorized damper 2 Check that the thermostat is receiving a steady 10 VDC across the red and white wires at the system controller terminal block on the comfort zone I O board and on the red white terminals on the base of the 4 zone controller 3 Check that the yellow or blue wires are connected properly and not broken at the system control ler terminal block on the comfort zone I O board and on the yellow blue terminal on the base of the 4 zone controller 4 Verify that the terminals are properly installed on the base plate of the controller 5 Wiring connector block for smart sensor could be defective ar 1 Check to see if high low temperature trip Limits have been exceeded Blinking HEAT or COOL Annunciator 2 Temperature sensor is improperly wired or defective Cooling or Heating is Requested But 1 Must have at least 1 zone with a demand greater than 1 5 F from setpoints The HEAT or COOL Annunciator is 2 Check system switches They must be set to AUTO or ON to operate displayed 3 Have you waited for timeguard 5 minutes to expire 1 Check that the LEDs on the 6 relay pack are indicating the correct relay is closed If not COOL or HEAT Annunciator is Lit But check for a bad relay Cool or Heat is Not On 2 Measure voltage across common red and any de energized relay Voltage should be 24vac 3
71. nterface Kit This is required to allow 2 speed outdoor units to select indoor airflow Latent capacity control Required field supplied See 2 speed Installation Instructions Field supplied isolation relay Step 13 Start Up 1 Verify that the zone number for remote room sensors and corresponding zone damper wire connections are the same in the Comfort Zone Center 2 Check that the AC power wires dampers and transformer are kept away from the DC wires remote room sensors four zone controller communication bus leading up to and in the Comfort Zone Center 3 Check location of four zone controller and remote room sensors to make sure that they are not near heat producing devices such as lamps sunlight and appliances 4 Make sure that the 3 wire communication bus cable for the four zone controller is not run in the same conduit or use the same cable jacket as the 5 wire conductor of the four zone controller 5 Make sure on a remote room sensor that you follow the wire guide stamped on the base by the terminal screws in order to keep polarity and voltages correct Otherwise the sensor will not work properly 6 Make sure the duct temperature sensor is placed in the supply air ductwork downstream of the furnace and evaporator coil and upstream of the bypass damper 7 Write down on a piece of paper AND GIVE TO THE OWNER a list showing what rooms are controlled by what dampers and their corresponding zone nu
72. on humidity rise HL38MG026 G COMFORT ZONE CENTER UNIT 24 VAG R COOL 1 Y1 COOL 2 Y2 HEAT 1 W1 HEAT 2 W2 FAN G RV COOL RV HEAT 2 SPEED AIR CONDITIONER 38TD FURNACE ES 77R ra LR E apel 5 N C au oppet 171 118 eS 44 E tw a E rash Ig 9 1 gt eg ii 5 L Laie cM XE lt gt 1 9 9 DNE Latent Capacity Control LCC R1 Relay DPST Pilot Duty 24 v coil HN61KK324 or Equivalent Humidistat opens on humidity rise HL38MG026 COMFORT ZONE CENTER UNIT 24 VAC R COOL 1 Y1 COOL 2 Y2 HEAT 1 W1 HEAT 2 2 RV COOL 0 RV HEAT 0 F 2 SPEED AIR CONDITIONER 88TD FURNACE aap 4 R A n e e g Yellow E 5 pei 2 L J Iva gp Green anl w2 e eg Orange agape t x L 5 NOTE Locking furnace into low fire may help prevent over conditioning in the heating mode This
73. option is used to place the entire building in setback during long unoccupied periods without the danger of freezing or extreme heat humidity SEQUENCE OF EVENTS FOR A NORMAL HEATING OR COOLING CYCLE Given the Comfort Setpoints and the space temperature for the zones within the system Comfort Zone will determine if active heating or cooling is required If so the Comfort Zone will perform the following 1 Select a reference zone 2 Make sure all zone dampers are fully open 3 Energize the HVAC equipment fan 4 Energize the heating or cooling equipment The equipment may be a compressor furnace strip heater etc 5 Set the zone damper positions based upon the zone demand 6 Energize additional stages of heating or cooling if demand warrants 7 Continue to adjust the zone dampers as the conditions within the zones change 8 Turn off the heating or cooling equipment when all zones are within 0 5 F of the desired comfort setpoint 9 Open all zone dampers when the equipment is turned off This is the basic Sequence of Operation for the Comfort Zone system The actual control of the dampers HVAC equipment and system fan will change with the configuration of the system Depending upon the configuration Comfort Zone can control heat pumps furnaces and dual fuel applications SELECTION OF A REFERENCE ZONE IN THE SYSTEM The first step in any heating or cooling cycle requires Comfort Zone to evaluate the zones dete
74. ous hazards which will result in severe personal injury or death WARNING signifies hazards which could result in personal injury or death CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage INSTALLATION CONSIDERATIONS 1 Install in a non condensing area with ambients between 32 F and 120 F Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 1 4 4 PC 101 Catalog No 809 552 Tab 5 2 5a Printed in U S A Form 920415 35 Pg 1 9 94 Replaces 920415 251 2 Use vibration isolators flex connectors on the zone dampers and ductwork to minimize noise 3 Place dampers away from areas that may be noise sensitive 4 TXV is required in air conditioning and heat pump applica tions 5 Use seperate isolated transformer to supply power to Comfort Zone System 6 Load calculations must be performed to determine equipment size Equipment selection is matched to block load It is imperative the equipment is not oversized 7 Duct work must be designed based off the sum of peaks plus 25 percent oversize It is imperative the duct work is not under sized INTRODUCTION This installation guide pertains to revision 1 6 or greater The Comfort Zone System allows the air conditioning and heating equipment to control temperatures in up to 4 distinct spaces or
75. rmine if heating or cooling is needed and select a Reference Zone The Comfort Zone system actively looks at the Comfort Setpoints and the space temperature in all zones If any zone in the system has a demand of 1 5 F or more then Comfort Zone will prepare to operate the heating or cooling equipment to reduce the demand First Comfort Zone will select a reference zone in the system The reference zone will be the zone with the greatest demand The zone damper serving the reference zone will be forced fully open and will remain fully open as long as that zone is used as the reference As long as any zone in the system has a demand greater than or equal to 1 5 F then the Reference Zone will be selected by the zone with the greatest demand Once all zones have a demand less than 1 5 F the Reference Zone selection will not change until the demand in that zone is below 0 5 F At this point Comfort Zone will re select the Reference Zone and position that particular zone damper fully open The objective of the Reference Zone is to ensure that the zone with the greatest demand is receiving as much conditioned air as the system will allow It also gives the Comfort Zone system a point of reference in observing the response of the zones to the equipment operation PRE POSITIONING DAMPERS AND STARTING THE SYS TEM FAN In order to minimize noise and enhance the system operation Comfort Zone maintains all Zone Dampers full open prior to startin
76. rt Zone Systems may reside on a bus with VVT system devices They may receive or broadcast time to these devices accordingly by toggling T5 enable broadcast on or off NOTE If multiple 4 zone controllers are on 1 bus only 1 can broadcast time Turn all others off T5 Comfort Comfort NOTE 1 5 2 2 SHIELD DRAIN WIRE Tk PORT 42 ISOSAT 01 DEVICE BUS SHIELD DRAIN WIRE TYP ISOSAT BUS v 2 zi PORT 1 PORT 2 ISOSAT 01 a NOTES 1 Use butt splices or solder for shield connections Then tape up shield PORT 1 6 2 Do not connect the shield 8 PORT 2 ISOSAT 01 drain wire at the end of Communication Bus Cut r and tape up to avoid shorting BUILDING GROUND Fig 3 Typical Communications Network Table 1 Wiring Requirements FROM NO MAX COMFORT ZONE GAGE CENTER TO OF WIRES LENGTH FT 3 18 22 200 100 Four Zone Controller 5 18 22 200 100 Remote Room Sen Sors 2 18 22 200 100 Remote Duct Sensors 2 18 22 200 100 Dx Coil Sensor 2 18 22 200 100 Home Access Module 3 18 22 1000 100 ISOSAT 3 18 22 1000 100 Transformert 2 18 75 When using ISOSATS in interfacing multiple buses together the length of wiring between ISOSATS cannot exceed 4000 ft with 18 gage T 24vac
77. rt zone panel and that the panel is properly grounded to the chassis 11 Remove the shield wire and check to see if the problem still exist 12 Verify that the shield wire has been clipped off at the sensor end and is not touching any other wires or any exposed metal 13 Ensure that there is a solid electrical ground on the electric power box 20 SF ERROR CODE Table 13 Storage Failure Errors Error Display Dial Position T4 must be turned on DESCRIPTION SOLUTION 01 Temperature Programming Error Reprogram the scheduled temperatures 02 Time Period Programming Error Reprogram the scheduled time periods ET 1 Turn selection dial to position 2 03 EL pod Calibration Out 2 Change temperature value 9 3 Return selection dial to any run mode position Valid temperature range 30 180 F EN 1 Turn selection dial to position 3 04 sone e Temperayre Calibration Out 2 Change temperature value 9 3 Return selection dial to any run mode position Valid temperature range 30 180 RET 1 Turn selection dial to position 4 05 A Calibration Out 2 Change temperature value 9 3 Return selection dial to any run mode position Valid temperature range 30 180 F 1 Turn selection dial to position 5 06 Calibration Out 2 Change temperature value 9 3 Return selection dial to any run mode position
78. s for any of the 4 zones can be displayed by the Four Zone Controller When the Four Zone Controller rotary switch points to zone 1 the setpoints for zone 1 at the Four Zone Controller are displayed Selecting zone 2 zone 3 or zone 4 will display the setpoints for each of these zones which use either remote room sensors or smart sensors The system is not required to have all 4 zones installed In the display window the cooling setpoint is shown on the upper left and heating setpoint is shown on the lower right HEATING AND COOLING COMFORT SETPOINTS If the space temperature is between the Heating and Cooling setpoints for the zone then the zone is said to be satisfied with respect to temperatures When a zone is satisfied no heating or cooling equipment will turn on to condition the space For example if the Cooling Setpoint is 76 F and the Heating setpoint is 72 F then a space temperature of 73 F is assumed to be satisfactory and no heating or cooling of the zone is required If the space temperature in a zone falls below the Heating setpoint then that zone needs to have heat added to the zone which will raise the space temperature back to the Heating Setpoint For example if the Heating Setpoint is 72 F and the space temperature is 70 F then the space temperature must be raised 2 degrees in order for the zone to be satisfied In this case the temperature heating demand for the zone is 2 F 72 F minus 70 F Otherwise if t
79. sed ON The system will use the outside air as first stage cooling and T19 Economizer mechanical cooling as second stage When the outside air The system will use only mechanical OFF temperature drops below 65 F the damper will modulate 10 cooling percent open Full open in cooling 1 The controller display will alternate between setpoints and The controller display will continuously T20 Enable Alternate Display zone temperatures show setpoints OFF The system will operate the fifth motor T21 Outside Air Damper Attached System wili oper te the ntthimotenized ua mper an ized damper as a motorized bypass OFF outside air damper d amper The system will re evaluate demand while still in a mode If simultaneous demand exists and the demand for the oppo The system will not change modes until 122 System Mode Reselect site mode exceeds the demand for the current mode for 20 current mode has been satisfied OFF minutes the system will change modes The system will report a transparent error when any zone T23 System Error Checking cannot be maintained within 5 F for longer than 20 minutes The system will not report the error OFF The system will be set to operate using OFF T24 50 Hz Operation The system will be set to operate using 50 hz power source 60 hz power source When the duct temperature is below 65 F or above 80 F the Damper position will not go below me minimum damper posi
80. setpoint Cool Switch OFF Cooling will not come on AUTO Cooling will come on when any zone is more than 1 5 F above the desired cool setpoint Fan Switch ON Fan will stay on continuously recommended AUTO Fan will come on only when heating or cooling is required Emergency Heat Switch Heat Pump Systems only OFF Electric strip heat will not come on unless there is a zone more than 2 F below the desired heat setpoint and comfort trend demand has been satisfied ON When any zone requires heat the electric strip heat will turn on The compresor will remain off CONTROLLER DISPLAY When set for normal operation the Four Zone Controller display shows the current zone temperature setpoints and allows the adjustment of these setpoints using the setpoint buttons By pressing both heating or cooling setpoint buttons simultaneously the controller will lock in and display the temperatures for that zone To release push both buttons simultaneously again This will only work when T 20 is off ZONE SELECTOR DIAL To view the setpoints for each zone turn the zone selector dial to the zone number you wish to view The setpoints for the selected zone will be displayed in the controller display Program Schedules Each zone has 3 different weekly periods Weekdays Saturday and Sunday and up to 4 different possible combinations of heating and cooling setpoints that can be programmed to provide auto matic cli
81. through 7 and S on the controller T11 Installer Switch Lockout display will display dashes All switch positions operate normally OFF 1 RR The outside air damper is forced to a minimum position of 2 The outside air damper is set to the posi OFF 712 Outside Air Ventilation when fan is on tion the system requests The system assumes a smart sensor is attached to zone 2 3 The 4 zone controller will read zone temperature and set The system reads zone 2 temperature via T13 Smart Sensor Attached For Zone 2 points for zone 2 via the 3 wire communications bus at 1 the remote room sensor OFF address below the controller The system assumes a smart sensor is attached to zone 3 The 4 zone controller will read zone temperature and set The system reads zone 3 temperature via T14 Smart Sensor Attached For Zone 3 points for zone 3 via the 3 wire communications bus at 2 the remote room sensor OFF address below the controller The system assumes a smart sensor is attached to zone 4 The system reads zone 4 temperature The 4 zone controller will read zone temperature and set T15 Smart Sensor Attached For Zone 4 points for zone 4 via the 3 wire communications bus at 3 the remote room sensor OFF address below the controller T16 Zone 2 Active Zone 2 is being used Zone 2 is not being used ON T17 Zone 3 Active Zone 3 is being used Zone 3 is not being used ON T18 Zone 4 Active Zone 4 is being used Zone 4 is not being u
82. time but remain at the last values entered for as long as the hold mode is active To release the hold mode press the HOLD TEMPERATURE button a second time The controller display will show the word HOLD whenever the hold mode is active Temperature Sensor Calibration NOTE Temperature sensors are factory calibrated however field calibration is recommended The setpoint display shows the actual temperature Fahrenheit or Celcius The upper left hand corner of the display indicates the whole number value The lower right hand corner indicated the tenths Pressing either the HEAT or COOL buttons either raises or lowers the displayed temperature by 1 10 of a degree 17 If temperature readings are not stable within 0 5 F refer to the troubleshooting section for details Table 10 Temperature Sensor Calibrations d rop SENSOR TO BE CALIBRATED Position 1 Damper Service Position Position 2 Zone 1 Temperature Sensor Position 3 Zone 2 Temperature Sensor Position 4 Zone 3 Temperature Sensor Position 5 Zone 4 Temperature Sensor Position 6 Duct Temperature Sensor 7 reir Position 8 Dx Coil Sensor Position 9 Base Temperature Setpoint Scale Damper Service Mode The Damper Service Mode can be selected to check full operation of each zone damper independently The controller display shows the zone number in the upper left digits and the damper position in the lower right digits The l
83. tion which is set as T25 Ventilation Mode damper will go fully closed i e below minimum damper po S5 hen the duct t t OFF sition in order to avoid over conditioning the zone PAVEN wen too cold or too hot Y2 will be used to turn on second stage of a 2 stage com T26 Two Stage Heat Pump pressor a heat pump system Second stage operation will be canceled OFF DX Sensor will be LAT checked in addition to the Duct Tem m T27 DX Sensor for LAT Checking perature Sensor T 10 must also be on DX Sensor is ignored for LAT checking OFF T28 Cool Without Fan The fan will not be energized The cooling equipment must The fan relay is energized anytime there OFF provide a way to turn fan on Pressing any setpoint button when a hardware error exists causes a reset if in a run position 19 is a cooling demand SYMPTOM Table 12 Operating Problems POSSIBLE CAUSE No Display Blinking Temperature Display Thermostat is not receiving power 1 Verify that comfort zone center is receiving 24 vac 50 va minimum required with 4 motorized dampers 5 va for each additional motorized damper 2 Check that the thermostat is receiving a steady 10 VDC across the red and white wires at the system controller terminal block on the comfort zone I O board and on the Red White terminals on the base plate of the 4 zone controller Low voltage 1 Verify that the comfort zone ce
84. urnace Installation Latent Capacity Control LCC Instructions For Details Involving Set Up Switch Configuration and Two Stage Furnace Operation R1 Relay DPST Pilot Duty 24 v coil HN61KK324 or Equivalent Humidistat opens on humidity rise HL38MG026 Fig 21 Typical Wiring Diagrams Furnace with Air Conditioner Continued 27 STANDARD STANDARD SINGLE SPEED SINGLE SPEED HEAT PUMP HEAT PUMP COMFORT ZONE CENTER FAN COIL C COMFORT ZONE SYSTEM FAN COIL C UNIT 24 VAC R Rp 4 R UNIT 24 VAC R 229 4 __ _ COOL 1 Y1 e e Yellow _ E COOL 1 Y1 e e Yellow fo 6 cooL2 v2 e op 2 oop HEAT 1 W1 HEATA AWI 2763 1 M HEAT2 W2 eo ge W2L w2 HEAT2 W2 6 eo pe i v FAN G e green FAN G B PET __ O orange w2 RV COOL 2703 pod 2 RV HEAT 0 e 1 RV HEAT O geak 19 drm LA L L E W3 E
85. will allow the furnace to stage between low and high fire Before using this feature read furnace Installation Instructions for two stage operation Connect W2 from the Comfort Zone Center to W2 on the furnace control board See Furnace Installation Instructions For Details Involving Set Up Switch Configuration and Two Stage Furnace Operation H Fig 21 Typical Wiring Diagrams Furnace with Air Conditioner Continued 26 2 SPEED AIR CONDITIONER 38TD COMFORT ZONE CENTER FURNACE UNIT 24 6 E 44R 18 O COOL 1 Y1 Yellow 9 Em 2p White ros HEAT 2 W2 e p OL RvoooL 0 2 eB gpaw _ TS COOL 2 Y2 FAN G e c p Green BV NEAT eap 2 O Blue _ HEAT 1 W1 W2 O Brown ER 02 Orange 541 3 Locking furnace into low fire may help prevent over conditioning in the sinsi D heating mode This will allow the furnace to stage between low and high fire Before using H this feature read furnace Installation Instructions for two stage operation Connect W2 from the Comfort Zone Center to W2 on the furnace control board Ezra See F

920415 Comfort Zone Installation and Start-Up

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