Installation and Wiring Guide for the OnTrac® CS4 and CS8 Boiler Management System Riverside Hydronics®, LLC WWW.RIVERSIDEHYDRONICS.
TABLE OF CONTENTS Caution and Mounting of Control_________________________________________________ 2 Cabinet Details ______________________________________________________________ 3 Wiring of Control Panel ________________________________________________________ 4 Wiring RS485 Communication Bus _______________________________________________ 5 Wiring External Set Point and Remote Proving ______________________________________ 6 Wiring Remote Equipment and Remote Alarm _____________________________
CABINET DETAILS CS4 CS8 Riverside Hydronics®, LLC WWW.RIVERSIDEHYDRONICS.
PLUG IN POWER SUPPLY • A plug in 24VDC power supply is provided with OnTrac. Connect as shown. • Field connection terminal are located under access cover. Riverside Hydronics®, LLC WWW.RIVERSIDEHYDRONICS.
WIRING RS485 COMMUNICATION WIRES The RS485 serial line applied to the OnTrac is a “Two Wire” electrical interface in accordance with the EIA/TIA-485 standard. On such a 2 wire-bus, at any time only one driver has the right for transmitting. A third conductor is to provide shielding and a common ground for the system. A balanced twisted pair with shield is recommended. AWG26 or larger can run up to 1000m.
WIRING AN EXTERNAL SET POINT (4-20mA INPUT) The OnTrac can utilize an external 4-20mA input from an Energy Management System (EMS) or any other signal source as a means of adjusting the set point. The Remote Set Point menu on the OnTrac must be activated and set up correctly in order to achieve the desired adjustment. See Programming Manual 34-152 for details. Connect the current input to the Remote Set terminals as described in the illustration below. • • • Connect the positive wire to the + terminal.
WIRING THE REMOTE EQUIPMENT RELAYS The Remote Equipment feature is provided for the activation of equipment such as circulation pumps, air louvers and active ventilation systems. When there is a call for heat the OnTrac will energize the remote equipment contacts and wait for a set time for any Remote Proving circuits to be energized. There are two relay outputs provided. See Programming Manual 34-152 for details. • • • There are two Remote Equipment outputs available.
WIRING SYSTEM SENSOR AND OUTDOOR SENSOR The system and outdoor sensors for the OnTrac are typically connected through Boiler 1 for the system sensor and Boiler 2 for the outdoor sensor. This is the default assignment but the location can be changed in the event of a faulty control. Follow the instruction below for wiring termination. The wire leads for the system and outdoor sensor should be connected to the TempTrac control located on the control panel of the boiler.
TEMPTRAC CONTROL MODULE When non-Riverside Hydronics boilers are controlled by the OnTrac boiler management system, the optional TempTrac Boiler Control module can be applied as a fully functional operating control or used to enable and disable only. The communication interface is made as described on page 5 of this manual. Each TempTrac Control Module will be wired in a daisy chain fashion along with the other boilers in the OnTrac system.
TEMPTRAC CONTROL MODULE CONTINUED If the TempTrac Control Module is applied in the (FULL CONTROL), R1 & R2 terminals will interrupt the operation of the boiler and T1 and T2 terminals will provide a 4 to 20mA signal to modulate the firing rate of the burner. If applied, terminals A1 & A2 can be wired to an alarm input from the boiler. The TempTrac control will communicate boiler water temperature to the OnTrac Multiple Boiler Control.
SPECIFICATIONS • Control – Microprocessor based Control with HMI (Human Machine Interface) • Enclosure – 16 gauge, powder coated steel cabinet with hinged front door access • Dimensions – CS8: 16 1/8” H x 16” W x 9” D • Dimensions – CS4: 12 3/4” H x 9” W X 7” D • Weight – CS8: 25 LBS • Weight – CS4: 12 LBS • Approvals Electronic Hardware - UL, CUL, CE • Approvals Assembly – ETL panel shop • Environmental - 32 -122°F (0-50°C) 10-95% Non-Condensing • External Power Supply – 24 VDC 1.
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