SECTION 1: INTRODUCTION
SECTION 1: INTRODUCTION
1.1 What is ROBERTS GORDON® ULTRAVAC™?
The ROBERTS GORDON® ULTRAVAC™ is a micro- processor based control package designed for modulating control of CORAYVAC® heaters based on outdoor temperatures.
This controller is capable of giving control outputs to one vacuum pump and three heating zones. The controller also features inputs which are used for indoor and outdoor signal condition monitoring.
System status and settings are viewed and altered from a PC (not supplied) running
ROBERTS GORDON® ULTRAVAC™ Software.
1.2 CORAYVAC® Design Requirements
CORAYVAC® burners shall be CRV
CORAYVAC® systems designed shall have minimum radiant pipe length and 1.5 - 2.0 feet per flow unit of tailpipe length.
CORAYVAC® systems designed shall have recommended radiant pipe length and 1.2 - 1.5 feet per flow unit of tailpipe length. See the CORAYVAC® Design Manual (P/N 127500NA) for minimum and recommended radiant pipe length.
1.3 General Requirements
The ROBERTS GORDON® ULTRAVAC™ series of controllers are supplied
ROBERTS GORDON® ULTRAVAC™ Software requires a PC (not supplied) running Windows® 95 or higher, with a Pentium® class processor and at least 64k of RAM.
The controller, variable frequency drive, burners, pump and outside air blower must be electrically grounded in accordance with the National Electrical Code® ANSI/NFPA 70 - latest revision.
Before proceeding with the installation of the control- ler, it will be necessary to check that the following points have been considered.
1.4Check Installation Materials 1.4.1 Switchable Loads
The controller relays are rated for switching loads no greater than 3 A. The total added current load for all 8 relays must not exceed 25 A.
1.4.2 Control Wiring
Shielded cable (four twisted pairs of stranded 24 AWG minimum wire) is required for use with indoor sensors.
Shielded cable (one twisted pair of stranded 22 AWG minimum wire) is required for the outdoor air sensor, VFD signal wiring, pressure switch and wiring from controller #1 to the PC.
Shielded cable (one twisted triad of stranded 22 AWG minimum wire) is required for
1.4.3 Control Board and Sensor Power
The power supply for all sensors is from the “+32 V” terminal to be found on the board of the controller. Power for the control board is 24 V provided by the relay board.
1.4.4 Programming Details
Every controller is
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