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General| Brand | Drayton |
|---|---|
| Model | SHR 521 20 |
| Category | Temperature Controller |
| Language | English |
Details on how to physically attach the unit to the wall, including warnings and placement notes.
Explains the electrical connections for power, relays, and sensors.
Explains the operation of the three pushbuttons for adjusting settings and navigating menus.
Describes the system monitoring display, including mode indication, tool bar, and system screen.
Details the system screen which displays active system schemes and component statuses.
Covers heat quantity balancing, including activation, flow volume, antifreeze, and reset.
Describes how malfunctions are indicated on the controller display and control lamp.
Explains how to diagnose sensor defects and check resistance values.
Provides guidance on checking and replacing the controller's fuse.
Offers solutions for common system issues like pump overheating or temperature differences.
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