Honeywell perfect climate comfort center control system - Manuals

68-0173—3 6 CAUTION Disconnect power supply before wiring to prevent electrical shock or equipment damage. Mounting the W8900A-C Remote Module Locate the W8900A-C in the equipment room near the HVAC equipment. See Fig. 8. CAUTION Do not mount the W8900A-C inside any HVAC equipment. Mounting the W890...

7 68-0173—3 IMPORTANT Be sure to connect the C terminal to transformer common. IN NEW INSTALLATION: 1. Locate the terminal strip(s) on the HVAC equipment. 2. Refer to Fig. 11 through 20 for wiring diagrams for spe- cific equipment applications. 3. Connect all loads to the appropriate W8900A-C wiring...

68-0173—3 8 Table 3. Heat Pump Applications (W8900B). a AUX controls the auxiliary heat like W2, and allows additional stages of auxiliary heat with outdoor thermostats while maintain- ing the proper second stage anticipation. b For systems without 2nd stage heat, configure W2 to No. c For systems r...

9 68-0173—3 WIRING DIAGRAMS W8900A,C Hookup Diagrams Fig. 11. Hookup diagram for heating/cooling system in conventional system with multiple transformers. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. JUMPER R TO RH FOR SINGLE HEAT TRANSFORMER APPLICATIONS. CONFIGURE PC...

68-0173—3 18 W8900A,B,C Humidity Control Hookup Diagrams Fig. 20. Hookup diagram connecting cooling humidity control in parallel with temperature control. Fig. 21. Hookup diagram connecting humidifier using separate transformers for humidity control in the heating mode. Mounting the PC8900A Control ...

68-0173—3 20 CAUTION Disconnect the power supply before connecting wiring to prevent electrical shock or equipment damage. All wiring must comply with all applicable electrical codes, ordinances and regulations. 1. Loosen the PC8900A terminal screws and insert one wire beneath each terminal (1, 2, 3...

21 68-0173—3 Fig. 25. Typical location for C7189A Remote Sensor (C7189A must be mounted in living space and not in return air duct). Wiring the C7189A Remote Sensor (if needed) CAUTION Failure to follow these wiring practices can introduce electrical interference (noise), which can cause erratic sys...

68-0173—3 22 Fig. 26. Wiring diagram for C7189A Remote Sensor to W8900A-C Remote Module. Mounting the C7089A Outdoor Sensor (if needed) Location Guidelines • Locate the C7089A Outdoor Sensor where it will be safe from tampering. • Choose an outdoor location for the sensor where there is good air cir...

23 68-0173—3 — Mount it high enough to prevent tampering or coverage by snow, ice or debris. • The wire distance between the C7089A and W8900A-C should not exceed 200 ft. Mounting 1. Remove the sensor from the mounting clip. 2. Mark the area on the surface where the C7089A mount- ing clip will be mo...

68-0173—3 24 CAUTION Disconnect power supply before connecting the wiring to prevent electrical shock or equipment damage. Wiring must comply with applicable codes, ordinances and regulations. 1. Wire the C7089A Outdoor Sensor to the terminals marked OUT on the W8900A-C Remote Module. If the leadwir...

25 68-0173—3 TO ENTER THE INSTALLER SETUP MODE: 1. Hold the PC8900A CHECK key until all display seg- ments are displayed (approximately three seconds). See Fig. 29. 2. Press the up and down arrowhead keys at the same time. The display goes blank, except for up to four seg- ments (SYSTEM, HEAT, COOL,...

68-0173—3 26 a The humidity option can only be set for heat or cool. If both are set to Y, it will not honor either one. Fig. 30. Initial display for installer setup. Heat Options When HEAT is flashing, refer to Table 5 for the options pertaining to the heat equipment that appear in the PC8900A disp...

27 68-0173—3 Press the up or down arrowhead key until the word HEAT is flashing on the PC8900A display. The PC8900A/W8900A-C is designed to be used on most types of heating systems. Initially, the PC8900A/W8900A-C are factory-set to be used on the following systems: PC8900A/W8900A,C models: Stage 1 ...

68-0173—3 28 The current day and time are now programmed. The preprogrammed schedule is activated. The preprogrammed settings can be customized or cleared. When using the preprogrammed settings as is, programming is done. To customize or create a new program, follow the steps in the Setting a Custom...

29 68-0173—3 4. Setting Ventilator a. Press VENTILATE to display VENT when increased ventilation is desired during the WAKE period. b. When normal ventilation is desired, press VENTI- LATE until VENT is not displayed. 5. Programming LEAVE, RETURN and SLEEP a. Repeat steps 2a through 4b for each peri...

68-0173—3 30 10. Programming the System Setting a. Press SYSTEM until desired setting ( HEAT, OFF, COOL, AUTO, EM HEAT ) is displayed. HEAT : The Comfort Center™ program controls the heating system. OFF : Both the heating and cooling systems are off. OFF flashes in the display. COOL : The Comfort Ce...

68-0173—3 32 Canceling Program Settings. Each period can be canceled. 6. Canceling Period a. Press DAY until the desired day appears in the dis- play. b. Press and hold SELECT PERIOD until the desired period to cancel for that day appears in the display. c. Press CANCEL. The time and temperature dis...

33 68-0173—3 h. Press CHECK again to display the system setting. i. Press CHECK or RUN to return to the program. Activating or Deactivating Keyboard Lockout When the keyboard lockout is activated, the programs, time and day, humidity and installer setup information cannot be changed. However, hold, ...

68-0173—3 34 Table 10. Heat Pump System Checkout. a a The polarity configuration of the reversing valve relay (O/B) determines if the O/B is always energized on first call for heat or cool. If the reversing valve energizes with heat, then it de-energizes with cooling. Factory setting is for O/B to e...

35 68-0173—3 Adaptive Intelligent Recovery™ Operation Adaptive Intelligent Recovery™ operation is Honeywell’s trademark for the way the Comfort Center™ system controls the heating and cooling equipment during recovery from an energy savings setting (SLEEP, LEAVE) to a comfort setting (WAKE, RETURN)....

68-0173—3 36 Heat Pump Recovery In Mild Weather When outdoor temperature is mild; for example 50°F (10°C), the recovery from energy savings is handled completely by the heat pump, without the need for auxiliary heat. The heat pump starts only after the setpoint has risen above the sensed temperature...

37 68-0173—3 outdoor temperature, humidity, current setpoint, system mode, alarm out on High-Low temperature, filter status and equipment failure. See separate instructions on CM8900A and W88735B for more detailed information. Minimum-Off Timing A minimum-off timer in the Comfort Center™ control sys...

68-0173—3 38 dehumidification requirement is still not met, cooling starts again. This switching continues until the dehumidification and cooling setpoints are met. This feature assures that the occupants do not experience excessive temperature drop due to the need for dehumidification. CO 2 Monitor...

39 68-0173—3 setup mode for a few seconds. After the RUN key is pressed, the discharge air temperature is displayed when the CHECK key is pressed (until another power outage occurs). NOTE: When a discharge air temperature sensor is installed and configured in an application, we recommend interruptin...

68-0173—3 40 TROUBLESHOOTING See Fig. 41 for troubleshooting procedures. Fig. 41. Troubleshooting procedures. 1. PRESS THE CHECK KEY. PC8900 DISPLAY SHOWS: WRONG DISCHARGE AIR SENSOR IS INSTALLED. • CHECK THAT C7100 DISCHARGE AIR SENSOR IS BEING USED. • CHECK THAT C7100 DISCHARGE AIR SENSOR IS BEING...

41 68-0173—3 Fig. 41. Troubleshooting procedures ( Continued ). • RECONFIGURE PC8900 FOR LOCAL SENSOR ONLY. PC8900 CONFIGURED FOR OUTDOOR TEMPERATURE SENSOR, BUT NOT INSTALLED. • CHECK THAT C7189 REMOTE TEMPERATURE SENSOR IS BEING USED. WRONG REMOTE SENSOR IS INSTALLED. • CHECK WIRING OF SENSORS AND...

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