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NewAir 8625 manual

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Table of contents for the manual

  • Page 1

    1 Application The Robertshaw 8625 is a multi-stage thermostat designed to control 24 V AC heat pump systems. Features • Large back lit display . • Four preprogrammed E NERGY S TA R ® setpoints for each day of the week. • Adjustable 1 st stage temperature differential: 1.0°F to 3.0°F (0.5°C to 1.5°C). • Adjustable 2 nd stage temperature[...]

  • Page 2

    IMPORT ANT SAFETY INFORMA TION WARNING: • Always turn off power at main fuse or circuit breaker panel before installing, removing, cleaning, or servicing thermostat. • Read all the information in this manual before installing this thermostat. • DO NOT CONNECT TO 120 V AC. This is a 24 V AC low-voltage thermostat. Do not install on voltages hi[...]

  • Page 3

    IMPORT ANT SAFETY INFORMA TION WARNING: In heat pump applications, do not connect anything to the W1 terminal. When switched to HP mode, W1 is connected internally to Y1 on the thermostat. Connect AUX heat to the W2/E terminal. 1. T urn off power to heating and cooling system. 2. Remove cover of old thermostat to expose wires. Do not disconnect wir[...]

  • Page 4

    6. Mark placement of mounting holes (see Figure 3). Set base aside. 7. Drill the marked holes using a 3/16” (5mm) drill bit. NOTE: Enclosed plastic anchors do not require a drilled hole for drywall. 8. T ap plastic anchors into the wall. 9. Align base with plastic anchors and feed wires through opening (see Figure 3). 10. Secure base to wall with[...]

  • Page 5

    Wiring Diagrams The following is just a sample of the most common types of HV AC systems. Refer to your system’ s installation manual for wiring information. 5 Hot Heating Control Cooling Control Transformer T H E R M O S T A T W1 C R Y1 G O B 24 VAC 120 VAC Hot Heating Control Fan Control Transformer 24 VAC 120 VAC Hot Heating Control Transforme[...]

  • Page 6

    6 T o T est Thermostat WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS V AL VE OR SYSTEM CONTROL TO TEST OPERA TION. THIS WILL DAMAGE THE THERMOST A T AND VOID YOUR W ARRANTY . CAUTION: DO NOT SWITCH SYSTEM TO COOL IF THE TEMPERA TURE IS BELOW 50°F (10°C). THIS CAN DAMAGE THE AIR CONDITIONING SYSTEM AND CAUSE PERSONAL INJURY . 1. Place the[...]

  • Page 7

    Programming Guide SETTING TIME OF DA Y AND DA Y OF WEEK 1. Press SELECT until the cursor is over SET CLOCK. Press SET . The HOURS segment will be blinking. Use the or button to adjust the time. NOTE: The AM or PM indicator will change as the HOURS display rolls through a 24 hour cycle. 2. Press SET . The MINUTES segment will be blinking. Use the or[...]

  • Page 8

    6. After pressing SET for the 4th event, the day of the week along the top will switch to SA T SUN and AM1 will be displayed. Repeat steps 2-4 to program the weekend settings. 7. With the weekend settings programmed, place the HEA T -OFF-COOL switch in the COOL position. Repeat steps 2-6 to program the cooling settings. CUSTOMIZING THE THERMOST A T[...]

  • Page 9

    6. Press SET . The display will switch to the differential setting for 2 nd stage heating and cooling. 7. The display will read diF2 . Press the or button to adjust the differential up or down. 8. Press SET . The display will switch to the differential delay . 9. The display will read dL Y2 . The differential delay is the length of time (in minutes[...]

  • Page 10

    Another way to select a temporary hold is: 1. Press SELECT until the cursor is over TEMP HOLD. Press SET . The temperature will be blinking. Use the or button to change the temperature. 2. Press SET . T o cancel a temporary hold, press SELECT until the cursor is above RUN/SET PROG. Press SET . Vacation Hold Y ou can set your thermostat to hold a de[...]

  • Page 11

    T roubleshooting Symptom Remedy Thermostat does not turn Check wiring. on system. (See Installing Item 8625 Thermostat ) Thermostat turns on and off too Increase temperature differential. frequently . (See Programming Guide ) System fan does not operate Move the Electric/Gas switch to properly . either gas or electric, to match system. (See Install[...]

  • Page 12

    12 ©2004 Climate Controls Americas 110-1101 Climate Controls Americas 191 E. North Avenue Carol Stream, Illinois 60188 United States of America TWO-YEAR LIMITED W ARRANTY Climate Controls Americas warrants to the original contractor installer or to the original consumer user , each new Robertshaw thermo- stat to be free from defects in materials a[...]