25 of 36 © 2009 D 664 - 07/09
B1
∆T Maximum The maximum ∆T for the snow
melting system.
PRIORITY ≠ NONE
10 to 70°F, OFF
(5 to 39°C, OFF)
Default = OFF
C1
Differential The differential for the snow
melting system.
Boil SENS = SUP
AUTO, 2 to 42°F
(AUTO, 1 to 23°C)
Default = AUTO
A
C1
Boiler Minimum The minimum temperature
allowed for the boiler target temperature.
Boil SENS ≠ NONE
OFF, 80 to 180°F
(OFF, 27 to 82°C)
Default = 140° (60°C)
C1
Fire Delay The time delay the control can expect
between the time the Boiler contact closes and
the boiler fi res.
Boil SENS = SUP
0:00 to 3:00 minutes
Default = 0:10 min
C1
Boiler Mass The thermal mass characteristics of
the boiler(s) that is being used.
Boil SENS = SUP
LITE, MED, HEVY
Default = MED
C1
Stage 1 Selects stage 1 as operational or not.
Boil SENS = SUP
AUTO, OFF
Default = AUTO
C1
Stage 2 Selects Stage 2 as operational or not.
Boil SENS = SUP
AUTO, OFF
Default = OFF
C1
Rotate Sets the rotation time for the stages.
This item is used by the Equal Run Time
Rotation function.
Boil SENS = SUP
10 to 72 hours,
OFF
Default = 48 hr
A
Exercise The frequency with which the control
exercises the pumps and valves that are operated
by the control.
30 to 240 hours,
(in 10 hour steps)
Default = 70 hr
Item Field
Access
Level
Description
Range
Actual
Setting
Section
LTD
USER
INST
ADV
664 Adjust Menu (3 of 3)
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