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Manafacture: Roberts Gorden File size: 2.16 mb File name: Language of manual:

Failure to follow these instructions can result in death or electrical shock. WARNING Explosion Hazard Turn off gas supply to heater before service. Failure to follow these instructions can result in death, injury or property damage. There are several methods of controlling CRV-Series systems. The options are as follows: 8.1 ROBERTS GORDON® System Control (P/N 02770002) The ROBERTS GORDON® System Control is an electronic controller designed for the control of CORAYVAC® and VANTAGE® NP (multiburner only) systems. The System Control is capable of giving four zones of burners' temperature control and power. The control will also give power output to as many as two pumps, provided that the load is not greater than 20 A and 1 O. For additional electrical specifications see the System Control Installation, Operation and Service manual (P/N 10091601NA). Electronic 24 Vac thermostats and mechanical thermostats with heat anticipator can be used. The system control offers a 24 Vac power supply to power electronic thermostats. Roberts-Gordon offers a selection of low voltage thermostats approved for use with the system control. A System Control operated system has two minutes post purge pump operation to completely exhaust products of combustion from the system. A system control provides indication of power to the pump and zones and indicates the status of the pressure switch with lights. The System Control is ETL listed in accordance with UL873 – Standard for Temperature Indicating and Regulating Equipment. 8.2 ROBERTS GORDON® ULTRAVAC™ The ROBERTS GORDON® ULTRAVAC™ is a micro processor based control package designed for modulating control of CRV-Series heaters based on outdoor temperatures. The controls offer full modulation between 60% and 100% of system maximum rated input. This controller is capable of giving control outputs to one 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. 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. Special design requirements apply for CRV-Series systems using the ROBERTS GORDON® ULTRAVAC ™ Controller, See Page 31, Section 10. SECTION 8: CONTROL METHODS Buildings today demand all sorts of control options based on the user’s preference. ULTRAVAC™ controls offer a host of communication options for integration with controls’ networks to best serve individual needs: BACnet®: Interface ULTRAVAC™ with other building management control platforms with our BACnet option. TCP/IP (LAN): Connect to ULTRAVAC™ via your local area network of computers. Load ULTRAVAC™ software onto any computer on the network and control and view your heating system from your computer. MODEM: Dial into ULTRAVAC™ from anywhere in the world via modem. Supplied as standard on all central controllers! RS-485: Hard wire ULTRAVAC™ directly to your computer. There are references in this manual to various trademarks. All trademarks mentioned herein, whether registered or not, are the property of their respective owners. Roberts-Gordon is not sponsored by or affiliated with any of the trademark or registered trademark owners, and make no representations about them, their owners, their products or services. Roberts-Gordon LLC is not sponsored by or affiliated with BACnet®. 8.3 SPST Transformer Relay (P/N 90417600K) The transformer relay can be used to control an EP100 or EP-201 pump CORAYVAC® system. The single pole relay can only be used to control one zone of burners. The electrical circuit is a 120 V AC (20 A) supply. The transformer 24 V AC output for the thermostat is rated at 40 V A. Thermostats used with the transformer must not exceed this power requirement. A transformer relay operated system will not give any post purge pump operation to completely exhaust products of combustion from the system or provide indication of operating conditions. The transformer relay wiring diagram is shown in the CORAYVAC® Installation, Operation and Service Manual (P/N 127102NA). 8.4 DPST Transformer Relay (P/N 90436300) The transformer relay can be used to control an EP100 or EP-201 pump CORAYVAC® system. The double pole relay can only be used to control two zones of burners. The electrical circuit is a 120 V AC (20A) supply. The transformer 24 V AC output for the thermostat is rated at 40 VA. Thermostats used with the transformer must not exceed this power requirement. A transformer relay operated system will not give any post purge pump operation to completely exhaust products of combustion from the system or provide indication of operating conditions. The transformer relay wiring diagram is shown in the CORAYVAC® Installation, Operation and Service Manual (P/N 127102NA). 8.5 Pressure Switch A pressure switch is required to confirm...

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