62-11389
4
−
10
4.7.2 Temperature Range Lock 1 & 2
Range Lock is a group of Configurations which may be
set to lock the unit into Start-Stop or Continuous
Operation for various set point ranges.
Two ranges are available for selection Range Lock 1
and Range lock 2. Each Range can be independently
set to lock it’s set point temperatures into either
Start-Stop or Continuous operation.
Each Range has it’s own selectable minimum and
maximum temperature, which define the span of the
range. If some set point temperatures are contained in
both ranges due to range overlap, Range 1 will always
have priority over Range 2.
Typically, both Range Lock 1 and Range Lock 2 are
used to control different set point ranges when IntelliSet
is not active. For units with IntelliSet active, because
each IntelliSet is generally programmed for a specific
product, only Range Lock 1 is used to hold the unit in
either the Start/Stop or Continuous Operation, and
Range Lock 2 is left off.
For example (see Figure 4
−
4), if Continuous Operation
is ALWAYS required whenever the set point is between
28
°
F and 55
°
F (-2.2
°
C and +12.8
°
C), Range 1 will be set
for Continuous, with a Minimum Temperature of 28
°
F
(-2.2
°
C) and a Maximum Temperature of 55
°
F
(-12.8
°
C).
Should Continuous Operation ALWAYS also be
required with set points between -22 and 0
°
F (-30 and
-17.8
°
C), then Range 2 will be set for Continuous, with a
Minimum Temperature of -22
°
F (-30
°
C) and a Maximum
Temperature of 0
°
F (-17.8
°
C). Any set point outside of
Range 1 or 2 will allow changes between Start-Stop and
Continuous.
Range Lock 1 & 2
Range 2 is set for
0
5
to -22
5
F
(-17.8
5
to -30
5
C)
Range 1 is set for
28
5
to 55
5
F
(-2.2
5
to +12.8
5
C)
-30
-23.3
-17.8
-12.2
-6.7
4.4
10.0
15.6
-1.1
21.1
26.7
5
C
-22
-10
0
10
20
40
50
60
30
70
80
5
F
Range 2
Range 1
Figure 4
−
4 Range Lock Settings - Non Overlapping
The primary time that it is important to determine which
range is to be Range 1 and which is to be Range 2 is
when the ranges overlap each other.
In example 2 (see Figure 4
−
5), the ranges have been
set to lock all set points into Start-Stop, except for a
small range b32
°
and +42
°
F (0
°
and 5.6
°
C)
where the unit will always operate in Continuous. Range
1 Minimum Temperature has been set for +32
°
F (0
°
C),
and Maximum Temperature of +42
°
F (5.6
°
C). Range 2
has been set for a Minimum Temperature of -22
°
F
(-30
°
C) and a Maximum Temperature of +89.6
°
F
(32
°
C). The unit will switch to Continuous when the
temperature is b32
°
and +42
°
F (0
°
and 5.6
°
C)
because, when the ranges overlap each other the
Range 1 settings will take priority.
