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Menu 9
Valve Exercise
MOT.
0 - 30 days
This line exercises the valve to keep it from sticking after a long period of inactivity. The valve periodically opens
at 1:00 am and closes 3 minutes later. The line is inactive if it is set at "0"; otherwise the number is how often the
event occurs: "1" for every day, "7" for once a week, or "10" for every 10 days.
Invert Outputs
INV.
0 or 1
In program 1 this line inverts outputs 1 & 2 . 0 means the relay closes on demand; 1 means the relay opens.
Limits
LIM.L & LIMH
These are inactive in this program.
Outdoor Cutoff Temperature
CUT.O
-40º F to 122º F
This is the outside temperature when the valve closes completely. Above this temperature the valve wonʼt open
except the valve exercise function (MOT, above) does function.
Duty Rotation (boilers in sequence)
DR
Inactive in this program.
Go to Menu 6 REGUL
Minimum Water Temperature
MIN W
41º F - 203º F
When you set the minimum water temperature the supply water temperature does not go below the setting until
the outdoor temperature is above the cutoff temperature. Then the valve closes.
MAXW
41º F - 203º F
When you set the maximum temperature, the supply temperature never rises above the setting.
Proportional Band
P.W
0.5º C - 99.5º C
Integral Time
I.W
0 - 50 minutes
Room Proportional Band
P.R
0.5 - 50º C
Room integral Time
I.R
0.0 to 99.5 minutes.
Temperature Deviation Limit
≠P
0.0 to 5.0
This function only works when you change the room temperature setting.
MAX-
0º - 90º C
MAX+
0º - 90º C
These are the minimum and maximum amount the room temperature can cause the supply water temperature to
deviate from the outdoor reset curve. If there is no outdoor sensor or room temperature sensor these lines have
no meaning. If no deviation is permitted the effect is the same as having no room sensor.
VENT
0 or 1
This setting prevents open windows or doors from having too much effect on the supply water temperature.
When active, it only permits the water temperature to rise 10º C (18º F) above the calculated value of the reset
curve. It disables itself after 1 hour.
Default 0
Default 0
Default 86º F
Default 75º F (24º C)
Default 140º F (60º C)
Default 60º C
Leave at the default setting.
Default 0.5 min Leave at the default setting.
Default 2.0º C Leave at the default setting.
Default 30 min Leave at the default setting.
Leave at the default setting.
Default 80º
Leave at the default setting.
Default 80º
Leave at the default setting.
6
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