Thermon HELLFIRE 400, Инструкция по установке, эксплуатации и обслуживанию

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E. CONTROLS & INDICATIONS
E.1 AAR Signal Wiring - For non SCADA installations
Table 1 – AAR Signal Wiring
Terminals Label Description
A1 - A2 REMOTE START A contact closure across these terminals starts the heater when the heater is in REMOTE RTC
mode.
A3 - A4 RUN Dry contact closes to provide a run indication.
A5 - A6 ALARM Dry contact closes to provide alarm indication.
A7 - A8 FORCE OFF
Default is closed. If FORCE OFF function is desired, remove shorting link and replace with
customer supplied relay contact. Open contact disables heater.
A9 - A10 TANK VALVE
These terminals are intended to operate a 120Vac gas supply solenoid shut off valve. They
energize when the motor contact closes.
A11 RS-485 (+) Communications, RS-485 positive terminal (for RCMS operation only)
A12 RS-485 (-) Communications, RS-485 negative terminal (for RCMS operation only)
E.2 Controller
1. The controller manages the operation of the heater
and allows it to either operate on its own or be part
of a network of heaters.
2. The controller monitors various inputs, controls the
heater functions, communicates status and provides
indication LEDs.
3. The controller is DIN rail mounted and all wiring
connections are made with plug connectors to allow
quick replacement in the event of a failure.
4. With the addition of the EMS package, a stand alone
heater can operate automatically based on weather
conditions, or when connected to a network, act as a
weather station providing input to a SCADA system.
5. Its’ RS-485 serial communications port allows the
heater to interface with SCADA systems, and be
operated and managed by a Remote Control and
Monitoring System,.
NOTE:
Controllers are not interchangeable between HELLFIRE
400 (24Vac) and HELLFIRE 900 (120Vac).