4 A
—MS2 Two Stage Electronic Temperature Control Installation Bulletin
Table 3: Functions and Settings
Mode
2d
= Direct
2r
= Reverse
2b
= Deadband
2i
= Independent Setpoint
d
Setting
Description
Setting Range
Default
SI
Setpoint
Modes d, r, b: relay cut-off point
Mode i:
heating independent setpoint
-40 to 99°F
(-40 to 70°C)
—
HI
Differential (Hysteresis)
Temperature difference relative to setpoint or offset at
which the load is switched On or Off
1 to 9F° (1 to 9C°)
5
S2
Setpoint 2 (Offset)
Modes d, r:
difference between setpoint and Stage 2
Mode b:
deadband (centered on setpoint)
Mode I:
cooling independent setpoint
d, r: 1 to 40F°
(1 to 40C°)
b:
2 to 40F°
(2 to 40C°)
I:
LL
to
HL
5
H2
Differential (Hysteresis) 2
See Differential (hysteresis)
1 to 9F° (1 to 9C°)
5
LL
Low Setpoint Stop
Lower limit of end-user setpoint adjustment
-40F° (-40C°) to
HL
32
HL
High Setpoint Stop
Upper limit of end-user setpoint adjustment
LL
to 99°F (70°C)
90
Cc
Anti-short Cycle Timer,
Cool
Time delay between equipment On cycles for cooling
stages
0 to 9 minutes
2
CH
Anti-short Cycle Timer,
Heat
Time delay between equipment On cycles for heating
stages
0 to 9 minutes
0
rt
Soft Start
Rate at which process temperature approaches setpoint
0 to 99
minutes/degrees
10
AH
High Temperature Alarm
High temperature alarm setpoint relative to main setpoint 0 to 50F° (0 to 50C°)
above setpoint
15
AL
Low Temperature Alarm
Low temperature alarm setpoint relative to main setpoint
-50 to 0F° (-50 to 0C°)
below setpoint
-15
Ad
Alarm Differential
Temperature difference relative to high and low alarms at
which alarm output is switched Off
1 to 9F° (1 to 9C°)
5
At
Alarm Time Delay
Delay between alarm detection and activation
0 to 99 minutes
15
So
Sensor Offset
Compensates for long sensor leads or sensor location
-20 to +20F°
(-20 to +20C°)
0
Un
Units Used
Temperature units used
0 = °C 1 = °F
1
PU
Display Refresh Rate
Time delay between display refreshes
1 to 99 seconds
1
IF
Binary Input Function
Configuration for normally closed binary input
0 = No binary input
1 = Shutoff/alarm
signaling
2 = Setback
3 = Remote shutoff
0
Sb
Setback
Value of setpoint shift when binary input is open and
IF
=2 0 to 20F° (0 to 20C°)
10
Id
Binary Input Time Delay
Time between binary input detection and enabling of
IF
0 to 99 minutes
0
iS
Interstage Time Delay
Minimum amount of time between two successive stages 3 to 90 seconds
3
R
epair and Replacement
Field repair must not be made. In case of defective or
improperly functioning control, contact your nearest
authorized Johnson Controls/PENN distributor.
When requesting a replacement, reference the model
number found on the data plate of the control.
