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Automation and Control Solutions

Honeywell International Inc.

Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North

35 Dynamic Drive

Golden Valley, MN  55422

Toronto, Ontario  M1V 4Z9

customer.honeywell.com

T7079A,B SOLID STATE REMOTE TEMPERATURE CONTROLLERS

® U.S. Registered Trademark
© 2009 Honeywell International Inc.
63-2572—04    K.K.  Rev. 07-09 

Summary of Contents for T7079A

Page 1: ...tion to remote sensing is desired FEATURES Switch selection of heat or cool mode Temperature sensing up to 400 feet Does not require field calibration 10K NTC temperature sensor Wide setpoint temperature range LED annunciation for both power on and relay state Dual setpoint scale F and C Isolation transformer for 24 Vac input Single or Dual stage output Dual stage output models can be configured a...

Page 2: ... only 120 230 Vac 50 60 Hz 10 15 Power Consumption See Table 2 Table 2 Power consumption ratings Contact Ratings At 120 Vac 1 2 hp 9 8 FLA 58 8 LRA At 230 Vac 1 4 hp 4 9 FLA 29 4 LRA At 120 230 Vac 125 VA pilot duty At 24 Vac resistive 8A Ambient Ratings Operating Temperature 40 to 140 F 40 to 60 C Storage Temperature 40 to 180 F 40 to 82 C Operating Humidity 5 to 95 RH non condensing Temperature ...

Page 3: ...t 122 meters from the T7079 using standard AWG 18 2 unshielded wire The sensor may be attached to pipes in an immersion well in a wall mounted case or on a bulb holder NOTES For cable runs greater than 25 feet shielded cable is recommended Multiple sensors can be parallel series wired to sense average temperatures in large spaces See Fig 2 To maintain control accuracy the number of sensors wired p...

Page 4: ...e temperature sensor wiring near welding equipment 5 Make sure good mechanical connections are made to both the sensor and the control 6 Use 90 C copper wire Fig 5 Board layout for T7079 NOTES 1 The larger conduit knockout on the enclosure bottom is for line voltage applications 2 The smaller knockout on the enclosure bottom is for low voltage applications 3 The sensor knockout is at the enclosure...

Page 5: ...r heating the stage 2 setpoint is the stage 1 setpoint minus the inter stage differential When stage 2 is used for cooling the stage 2 setpoint is the stage 1 setpoint plus the inter stage differential Fig 8 Adjustments potentiometers and switches TWO STAGE HEAT 1 Set ST1 and ST2 switches to HEAT 2 Set interstage INTER and differential DIFF1 DIFF2 to desired settings 3 Position the setpoint knob a...

Page 6: ... controlled equipment Keep in mind that based on the terminal board labels the stage 1 relay is J4 the stage 2 relay is J5 With the controller installed and wired use the following procedure 1 Verify all settings 2 Apply power 3 Check for proper equipment response a Cooling applications turn the setpoint knob counterclockwise until the stage LED lights b Heating applications turn the setpoint knob...

Page 7: ...T7079A B SOLID STATE REMOTE TEMPERATURE CONTROLLERS 7 63 2572 04 ...

Page 8: ...Limited Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley MN 55422 Toronto Ontario M1V 4Z9 customer honeywell com T7079A B SOLID STATE REMOTE TEMPERATURE CONTROLLERS U S Registered Trademark 2009 Honeywell International Inc 63 2572 04 K K Rev 07 09 ...

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