SECTION 8: CONTROL METHODS

CORAYVAC® Modulating system. The system will modulate based on the temperature sensed at the modulating thermostat, not outdoor temperature. The modulating controls offer many features like 7 day programmability, four time periods per day (2 occupied, 2 unoccupied), temporary temperature setpoint override, keypad lockout security and more. Remote sensors or outdoor sensors are optional, not required. Remote sensors will allow for zone temperature averaging, if required.

8.3.1 Analog Signal Modulating Thermostat

Aprogrammable, 7-day programming, modulating thermostat can be installed to supply an analog (4- 20mA) or (2-10Vdc with 500 Ohm resistor) control signal to dictate the speed of the pump. Optional room sensors (P/N 10081520) and outdoor air sensors (P/N 10081521) are available.

Room temperature averaging networks can be created with up to nine room sensors (P/N 10081520). Refer to thermostat installation instructions for wiring.

8.3.2Analog Signal Modulating Thermostat with LonWorks® Communication

If LonWorks® communication is required, a

modulating thermostat can be installed to supply an analog (4-20 mA or 2-10 Vdc) signal to control the pump speed. An optional room sensor (P/N 10081520) and outdoor air sensors

(P/N 10081521) are available for this thermostat as well.

The modulating thermostat with LonWorks® provides networking capability in a LonWorks® system. With communications port running at 78 kilobits per second (kbs), this thermostat can be configured to perform a variety of activities in which data is sent or received via LonWorks®. Information that can be shared, viewed and modified with the network includes:

•Current year, month, day, hour, minute, second.

•System Mode.

•Space Temperature

•Outdoor air temperature

•Current setpoint

•Occupied/Unoccupied schedule commands.

•Space Temperature

8.3.3Analog signal Modulating with BACnet®

Programmable Thermostat

If BACnet® communication is required, a BACnet® enabled modulating thermostat can be installed to

supply an analog output (0-10VDC) signal control to dictate the speed of the pump.

This thermostat is a flexible, wall-mounted stand- alone control with combined controller/sensor. BACnet® connections allow integral peer to peer BACnet® MS/TP LAN network communications with configurable baud rates and can easily integrate with

abuilding automation system.

MS/TP Wiring

Connect the -A terminal in parallel with all other -A terminals on the network and the +B terminal in parallel with other +B terminals. Connect the shield of cable (Belden cable #82760 or equivalent). Connect the cable shield to a good earth ground at one end only.

8.4 SPST Transformer Relay Kit (P/N 90417600K)

The transformer relay can be used to control an EP- 100 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.

8.5 SPDT Transformer Relay (P/N 90436300)

The transformer relay can be used to control an EP-

100or EP-201 pump CORAYVAC® system. The dou- ble pole relay can only be used to control two zones of burners. The electrical circuit is a 120 V AC (20 A) supply. The transformer 24 V AC output for the ther- mostat 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.

8.6 Pressure Switch

A pressure switch is required to confirm pump opera- tion on all systems.

A pressure switch is also required on the inlet duct of a non-pressurized air supply.

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Roberts Gorden CRV-B-9 Analog Signal Modulating Thermostat, MS/TP Wiring, Spst Transformer Relay Kit P/N 90417600K
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CRV-B-9 specifications

The Roberts Gordon CRV-B-9 is a state-of-the-art infrared radiant heater designed for industrial and commercial heating applications. Renowned for its efficiency and effectiveness, the CRV-B-9 represents a significant advancement in the world of space heating solutions.

One of the main features of the CRV-B-9 is its advanced infrared technology, which allows for precise heating without the necessity of warming the entire space. This targeted heating provides immediate comfort, as it directly warms objects and people rather than the air around them, making it particularly effective in large warehouses, manufacturing facilities, and retail spaces.

The heater boasts an impressive output of up to 80,000 BTUs, making it suitable for a wide range of applications. It utilizes natural gas as fuel, which contributes to its efficiency and cost-effectiveness. With a robust design and durable construction, the CRV-B-9 is built to withstand the rigors of industrial environments while ensuring a long product lifespan.

Another significant characteristic of the CRV-B-9 is its ability to integrate with advanced control systems. This includes compatibility with programmable thermostats and energy management systems, allowing for optimized temperature control and reduced energy consumption. The heater can be adjusted to suit different operational needs, making it a flexible solution for various heating scenarios.

The CRV-B-9 also features a compact design, allowing for easy installation in a variety of spaces. Its low-profile shape and modular capability enable users to arrange multiple units to achieve the desired heating coverage without compromising floor space, a crucial aspect for busy, high-traffic areas.

Safety is a priority with the CRV-B-9, which is equipped with various safety features such as a flame safety cutoff switch and over-temperature protection. These mechanisms ensure safe operation, providing peace of mind for users in demanding environments.

In summary, the Roberts Gordon CRV-B-9 infrared radiant heater stands out for its innovative technology, impressive output, energy efficiency, and safety features. Its flexibility and robust design make it an ideal choice for businesses looking to enhance comfort while minimizing energy costs. Whether in a manufacturing plant or a retail outlet, the CRV-B-9 provides a reliable and effective heating solution.
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