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22
T
he selection of the correct ratio depends on the initial
temperature Set Point set on screen 02 and the
desired system water temperature. If the building is
too cold, increase the ratio value. After changing the
r
atio, wait several days and evaluate the comfort level
before making another change.
Advanced Programming
Feature
Line 2 may be modified by inserting the building
design characteristics into the formula. The Reset
Ratio will be modified to reflect those characteristics.
NOTE: This information works the same in °C (not
shown for clarity).
70SUTATSMETSYS
SY STEM NORMAL
Screen number
If more than one ERROR, all errors will be displayed in sequence.
ERROR Indications:
System Status:
To show the status of other boilers in the system, push either the "LEFT" or "RIGHT" button. If the controller is
in a fault condition, the boiler number can be displayed automatically.
NOTE: The alarm horn can be silenced by pushing
the mode button.
NO SAFETY SIGNAL Safety signal (24VAC) not present on J7 connector
NO CFH SIGNAL Call-for-heat signal (24VAC) not present on J6 connector
WATER TEMP>MAX System water temp > Maximum allowed temp
ILS>OLS Inlet water temp > Outlet water temp
SYS IS OPEN System water sensor or cable/connector is open
SYS IS SHORT System water sensor or cable/connector is shorted
OLS IS OPEN Outlet water sensor or cable/connector is open
OLS IS SHORT Outlet water sensor or cable/connector is shorted
ILS IS OPEN Inlet water sensor or cable/connector is open
ILS IS SHORT Inlet water sensor or cable/connector is shorted
OSS IS OPEN Outdoor air sensor or cable/connector is open
OSS IS SHORT Outdoor air sensor or cable/connector is shorted
Message
Meaning
Table I: Error Indications