Modu-Fire® Gas-Fired Boiler
Analog Input Direct Drive
The firing rate of the boiler is controlled by an ex- ternal analog signal, usually from a multiple boiler control. The boiler turns on and off as directed by the external control.
An operating limit control ensures that the boiler temperature does not exceed the set value.
Refer also to Section 3.12.1B.
Use of the Controller
Operating Limit Closed
Firing Rate Decreasing
| Firing Rate Increasing |
| |
Actual Value |
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| |
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Display (red) |
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Setpoint | Manual Opera- | ||
tion | |||
Display | |||
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(green) | Alarm Relay | ||
| Energized | ||
Decrease | Increase | ||
Value | Value | ||
PROGRAM | EXIT But- | ||
Button | ton | ||
The diagram shows the RWF40 after switching on power. This condition is called the basic display. The actual value and the currently active setpoint are shown here. Manual operation,
Operation of the Control
The temperature control has three levels of cascad- ing menus. They are:
USER level,
Installation
PARAMETER level, and the
CONFIGURATION level.
The following table indicates the menu options available from each level. The options available depend on the operating mode of the boiler.
User Level:
To access the User level from the basic display press PGM.
Change the setpoint SP1 with | or . |
Change to setpoint SP2 or dSP with PGM. Change the setpoint SP2 or dSP with or . Return to the basic display with EXIT.
Manual Operation of the Boiler
The boiler firing rate can be controlled manually.
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