2 A
—MS2 Two Stage Electronic Temperature Control Installation Bulletin
Use this table, with function
So
, to compensate for long
sensor wire.
Table 1: Sensor Wire Size and Length
18 AWG
20 AWG
22 AWG
Offset
300-599 ft
91-183 m
190-374 ft
58-114 m
120 -239 ft
36-73 m
1F°
1C°
600-899 ft
183-274 m
375-564 ft
114-172 m
240-349 ft
73-107 m
2F°
2C°
900+ ft
274+ m
565+ ft
172+ m
350+ ft
107+ m
3F°
3C°
Table 2: Rating Table
Rating Category
120
VAC
240
VAC
24
VDC
Horsepower
1/4
1/2
-
Full Load Amperes
5.8
4.9
-
Locked Rotor Amperes
34.8
29.4
-
Inductive (non-motor)
Amperes
8
8
8
Pilot Duty VA
275
450
-
Relay outputs must not exceed 20 amperes total
connected load. Power supply is 24 VAC.
F
CC Compliance
This equipment has been tested and found to comply
with the limits for a Class A digital device pursuant to
Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful
interference when the equipment is operated in a
commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the
instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in
a residential area is likely to cause harmful
interference, in which case the user will be required to
correct the interference at his/her own expense.
C
anadian DOC Compliance
This digital apparatus does not exceed the Class A
limits for radio noise emissions from digital apparatus
set out in the Radio Interference Regulations of the
Canadian Department of Communications.
D
isplay
Press Up and Down buttons to scroll through process
temperature and binary input status (
On
or
OF
). After
15 seconds of inactivity, the display shows the process
temperature.
S
etting Up the Stage Control
To lock/unlock the unit for programming
Press the Enter, Up, and Down buttons
simultaneously and hold until “- - -” is displayed.
Hold for about 10 seconds until the current
temperature is displayed. This toggles the
keypad between locked and unlocked.
To run the self test procedure
IMPORTANT: Disconnect loads before beginning self-test
procedure. Cycle power to resume normal
operation.
Press the Up and Down buttons in sequence,
and hold for 5 seconds.
To select the mode of operation
1. Press and hold the Enter and Down buttons
simultaneously for approximately 7 seconds.
2. Press the Up or Down button until the desired
setting is shown.
2d
= Direct (cool)
2r
= Reverse (heat)
2b
= Deadband
2i
= Independent Setpoint
3. Press the Enter button to save the new mode
of operation.
To change the setpoint (modes b, d, and r only)
1. Hold the Enter button down for 3 seconds.
The display will change to show the setpoint.
2. Press the Up or Down button until you reach
the new setpoint.
3. Press the Enter button to save the new
setpoint.
Note: If you do not press the Enter button after selecting the new
setpoint, it is not saved. The control reverts to old setpoint.
To program other settings (modes b, d, r only) or to
program setpoints and settings (mode i only)
1. Hold the Enter button down for about
10 seconds. The display will change to
HY
.
(The display shows
S1
if in Mode i.)
2. Press the Up or Down button until the desired
setting is shown.
3. Press the Enter button. The
setting’s current
value is displayed.
4. Press the Up or Down button until the desired
value is shown.
5. Press the Enter button to save the new value.
After 10 seconds of inactivity, the display will
return to its normal function.
Note: If you do not press the Enter button after selecting the new
