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Novar Savvy Service Manual

Summary of Savvy

  • Page 1

    Savvy ® service manual introduction the savvy ® functions as both a system network manager and intelligent local controller in novar’s logic one ® automated building control system by combining the capabilities of an executive processor and an input/output module. The savvy can be configured to meet...

  • Page 2

    Warning! Some service and maintenance checks in this manual require that the unit’s power be turned on. Multiple voltages at the rooftop unit present an electrical shock hazard that can cause injury or death. Before attempting to service novar equipment, turn off power to the rooftop unit at the dis...

  • Page 3

    Doc. #td-0240 11/30/06 3 savvy ® service manual figure 1. Savvy transition board.

  • Page 4

    Note! The savvy is a class 2 low-voltage device. Do not connect 120 vac to any terminal. Do not connect ac voltage to module network class 2 communication terminals. Do not connect dc voltage to module output class 2 terminals (the triacs will not work). Do not ground the transformer for this module...

  • Page 5

    Replacing the savvy electronics assembly if the troubleshooting procedures provided in this document indicate that the savvy should be replaced the following procedure should be used. Step procedure 1 remove the bottom cover from the savvy: § loosen the two allen screws at the bottom of the savvy. §...

  • Page 6

    Step procedure 4 loosen the two retaining allen screws used to mount the electronic assembly to the savvy baseplate (see figure 2). 5 push the assembly straight up off the base. 6 slide the replacement electronics assembly down from the top of the baseplate assembly, over the mounting posts, guiding...

  • Page 7

    Analog light sensor the analog light sensor (als-300 and als-1.5k; figure 3) is mounted on the outdoor sensor assembly on the roof, facing north. It uses a shielded, two-wire cable to: § receive 24-vdc power from the savvy or an input/output module (iom). § send a 4- to 20-milliamp signal proportion...

  • Page 8

    Taking a milliamp reading at a sensor the following procedure should be used when it is necessary to take a milliamp reading at a sensor. Step procedure 1 remove the positive wire from the sensor terminal strip. 2 move the meter leads to the amp socket of the meter and set the meter to an amp range ...

  • Page 9

    Doc. #td-0240 11/30/06 9 savvy ® service manual no yes no yes no yes typically, the als is wired to savvy terminals 42 and 43 (input #1). Refer to the savvy baseplate installation instructions for exceptions or contact your novar controls account representative. Is the sensor properly wired? Meter t...

  • Page 10

    Outdoor temperature sensor the outdoor temperature sensor (ots; figure 5) is a digital pulse sensor designed for use with novar’s executive controller or savvy. The ots/2 model is a 4- to 20-ma analog sensor designed for use with novar’s executive processor (ep/2) or savvy. The ots/2 comes equipped ...

  • Page 11

    Doc. #td-0240 11/30/06 11 savvy ® service manual no yes if voltage is incorrect with wires connected to the terminals & correct with wires disconnected from terminals no yes meter terminals 60 to 61 and 62 to 61 with the wires connected and again with the wires disconnected: with the wires connected...

  • Page 12

    12 doc. #td-0240 11/30/06 savvy ® service manual no yes no yes no yes no yes no yes determine the input number and meter the appropriate terminals at the or iom with the wires connected. Is 24 vdc present? Savvy analog sensor faults troubleshooting chart take a milliamp reading at the terminal strip...

  • Page 13

    Doc. #td-0240 11/30/06 13 savvy ® service manual no yes no yes remove the wires from terminals 65 and 66 and meter them. Is 5 vdc present? No yes reconnect the wires to terminals 65 and 66. Remove the wires from the relay on the phase loss monitor and meter them. Is 5 vdc present? Replace the using ...

  • Page 14

    14 doc. #td-0240 11/30/06 savvy ® service manual move the hoa switch to the up position and, at the control relay for that load, meter the coil. Is 24 vac present? No yes determine which output is not working and if it is programmed to fail on or off. Outputs troubleshooting chart the 24 vac to the ...

  • Page 15

    Doc. #td-0240 11/30/06 15 savvy ® service manual digital inputs troubleshooting chart closed opened determine which digital input is not working and meter the appropriate terminals at the or iom with the wires connected. Is 24 vdc present? Savvy no yes is the contact opened or closed? Closed opened ...

  • Page 16

    Savvy ® and logic one ® are registered trademarks of novar. The material in this manual is for information purposes only. The contents and the product it describes are subject to change without notice. Novar makes no representations or warranties with respect to this manual. In no event shall novar ...