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Exercising
In a hydronic snow melting system, the
control operates the system pump every
three days to prevent pump seizure.
Alert relay
The control includes an auxiliary relay that
can be configured to be either a system
pump or an alert output. When the Auxiliary
Relay setting in the System menu is set to
Alert, the relay closes whenever there is a
local error code. The Alert Relay is connected
to the input power R and provides a 24 VAC
powered signal when closed. An isolation
relay may be installed if a dry contact switch
is required on the third-party equipment.
Pump post purge
After a zone has finished heating, the boiler
or heat source is shut off and the zone
continues to operate for 20 seconds to
post purge heat from the boiler to the zone.
Troubleshooting
It is recommended to complete all wiring to ensure trouble free operation. Should an error
occur, simply follow these steps:
1. Find: If the control flashes on the screen, it is indicating a problem on the system.
2. Identify: Hold the Home button for 3 seconds, touch the NEXT key to locate the Toolbox
Menu, then touch the ENTER key. The error code should appear as the first item.
3. Solve: Use the chart below to match the error code to the one on the control. Use the
description to solve the problem
Error messages
Field
Description
SET TEMP MENU SAVE ERROR
— The control failed to read the Set Temp menu
settings from memory and has reloaded the factory default settings. The control stops
operation until all settings in the Set Temp menu are checked.
To clear the error, set the access level to Installer and check all settings in the Set
Temp menu.
SYSTEM MENU SAVE ERROR
— The control failed to read the System menu
settings from memory and has reloaded the factory default settings. The control
stops operation until all settings in the System menu are checked.
To clear the error, set the access level to Installer and check all settings in the
System menu.
BOILER MENU SAVE ERROR
— The control failed to read the Boiler menu settings
from memory and has reloaded the factory default settings. The control stops
operation until all settings in the Boiler menu are checked.
To clear the error, set the access level to Installer and check all settings in the
Boiler menu.
