Precedent - Application Guide

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Introduction

The Symbio™ 700 installed on Precedent™ rooftop units is a factory-installed and programmed controller, providing digital control and protection of the equipment.

The Symbio 700 has two model options:

• Standard Controller — provides advanced troubleshooting and access to the Symbio Service and Installation mobile app via a Bluetooth connection. The Standard controller does not support remote communications of any type or custom TGP2 programming abilities. A Standard controller can be converted to an Advanced controller

• Advanced Controller — supports Building Automation System interface via BACnet® (ANSI/ASHRAE Standard 135- 2016), Modbus™, Air-Fi®, or LonTalk®. The Advanced Controller also allows optional (field applied) TGP2 programming utilizing optional XM30 and XM32 Expansion Module points. The advanced controller is a purchased feature.

The Symbio 700 offers multiple equipment configuration options regardless of controller model. The Precedent rooftop unit can be configured as the following system types:

• Conventional Thermostat Control (T-Stat) - Heating and cooling operation for space comfort managed by conventional thermostat inputs.

• Constant Volume Zone Temperature Control (CVZT) - Multi-speed supply fan control to manage space comfort.

• Variable Volume Zone Temperature Control (VVZT) - The modulating supply fan speed modulates with heating or cooling capacity to maintain space comfort.

• Variable Volume Discharge Air (VVDA) - The supply fan modulates air volume to maintain duct static pressure control. Also known as Multi-Zone VAV.

These configurations can be used with standard cooling systems.

This guide provides information about the configuration, control capabilities and troubleshooting of the Precedent system with Symbio 700 controller.

WARNING:

Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.