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Novar Savvy Service Manual

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®
Savvy
Service Manual

Introduction

Precautions

DOC. #TD-0240 11/30/06
The Savvy
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 complex
control requirements, regardless of facility size and/or
special monitoring and data collection requirements.
This document describes the Savvy, provides instructions
for replacing the electronics assembly and for taking a
milliamp reading, and provides troubleshooting guidelines
for:
WARNING! Before performing any of the operations outlined in
this document, review the Note and the Warning that
appear at the beginning of this manual.
NOTE! To perform any of the operations outlined in this manual,
a person must meet both of the following qualifications:
Be a licensed electrician or a licensed HVAC
technician.
Have experience in troubleshooting building
automation and HVAC controls.
®
functions as both a system network manager
®
1

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  • Page 1 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 complex control requirements, regardless of facility size and/or special monitoring and data collection requirements.
  • Page 2 Description The Savvy is mounted on a baseplate and powered by a 24-VAC, Class 2, transformer connected to a 120-VAC source. A second 120-VAC circuit powers the transformer for the outputs. The output terminal strip is rated 24-VAC, 2 amps, pilot duty.
  • Page 3 Savvy Service Manual ® Figure 1. Savvy transition board DOC. #TD-0240 11/30/06...
  • Page 4 Savvy Service Manual ® 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).
  • Page 5 Remove the bottom cover from the Savvy: Loosen the two Allen screws at the bottom of the Savvy. Pull the bottom of the cover away from the Savvy and down. Move all lighting HOA toggle switches to the center position to ensure that all lighting loads stay on.
  • Page 6 Perform a program download, if needed, and verify that the equipment is operating properly. Set all lighting HOA toggle switches to the AUTO position. Return the Savvy’s bottom cover and tighten the screws to secure it. Allen screws used to mount the electronics assembly to...
  • Page 7 NOTE! When the sensor is wired, polarity must be observed. The Savvy translates that signal into a 0–300 or 0–1500 footcandle reading. The sensor is permanently calibrated at the factory. The Analog Light Sensor Faults Troubleshooting Chart included in this document can be used to troubleshoot ALS faults.
  • Page 8 Savvy Service Manual ® 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 Remove the positive wire from the sensor terminal strip.
  • Page 9 Service Manual ® Analog Light Sensor Faults Troubleshooting Chart 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?
  • Page 10 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 with a light-emitting diode (LED).
  • Page 11 Savvy Service Manual ® Outdoor Temperature Sensor Faults Troubleshooting Chart NOTE! The sensor is polarity-sensitive and will read open fault if the polarity is not correct. The LED is not polarity-sensitive; it indicates power is present. Meter Savvy Terminals 60 to 61 and 62 to...
  • Page 12 The sensor is shorted. Replace it The wire is shorted. and make sure the replacement Trace and repair it. operates properly. Replace the sensor and Revers the make sure the replacement connections. operates properly. Refer to the Savvy Baseplate Installation Instructions. DOC. #TD-0240 11/30/06...
  • Page 13 Savvy Service Manual ® Phase Loss Faults Troubleshooting Chart Is the correct power coming into the main distribution panel? Is high voltage present in Call the local utility the phase loss monitor? for instructions. Are the circuit breakers Meter Terminals 65 and 66 on the...
  • Page 14 Determine which output is not working and if it is programmed to fail on or off. FAIL ON FAIL OFF Savvy switches 24 VAC to the relay to turn Savvy switches 24 VAC to the relay to turn the the load on and 0 VAC to turn the load off.
  • Page 15 Savvy Service Manual ® Digital Inputs Troubleshooting Chart Determine which digital input is not working and meter the appropriate terminals at the Savvy or IOM with the wires connected. Is 24 VDC present? Is the contact Is the contact opened or closed?
  • Page 16 Novar makes no representations or warranties with respect to this manual. In no event shall Novar be liable for technical or editorial omissions or mistakes in this manual, nor shall it be liable for any damages, direct or incidental, arising out of or related to the use of this manual. No part of this manual may be reproduced in any form or by any means without prior written permission from Novar.

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