Johnson Controls MS1 Manual
FANs 125, 121
Pressure Controls Section P
Installation Bulletin
Issue Date 1199
© 1999 Johnson Controls, Inc. 1
Part No. 24-7664-1806, Rev. A www.johnsoncontrols.com
Code No. LIT-125503
IMPORTANT: All MS1 controls are designed for
use only as operating controls.
Where an operating control
failure would result in personal
injury or loss of property, it is the
responsibility of the installer to
add devices (safety, limit
controls) or systems (alarm,
supervisory systems) that protect
against, or warn of, control
failure.
Refer to the MS Series Multi-Stage Electronic Controls
Product Bulletin, LIT-125502, for necessary
information on operation and performance
specifications for this product.
Mounting
The MS1 control is not position-sensitive but should be
mounted for convenient wiring and adjustment.
To mount the MS1 DIN Rail Mount version, install the
DIN rail where appropriate. Snap the control onto the
rail in position.
Wiring
!
WARNING: Risk of Electrical Shock.
Disconnect power supply before
making electrical connections to
avoid possible electrical shock or
equipment damage.
Follow these wiring guidelines:
•All wiring must conform to the National Electric
Code and local regulations.
•Make all wiring connections using adequate gauge
copper conductors only. Connectors are rated for
14-22 AWG wiring.
V0
Internal
to Control
Power
Supply
Stage
➀
SCS1
Alarm
+
-
V1 V2 C1
Sensor
➀
Sensor
Common
Terminal
Not Used
A+ A-
Refer to Rating Table for more information.
Figure 1: MS1 DIN Rail Mount Wiring
INSTALLATION BULLETIN
MS1 One Stage Electronic Control
2 P—MS1 One Stage Electronic Control Installation Bulletin
Table 1: Control and Sensor Wiring
MS Series
Terminal
P99-1V
Wire Color
HE-6300 or
HE-6310
Terminal
VO Brown PWR
SC Green COM
S1 White OUT
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
888
Pilot Duty VA 275 450 -
Alarm circuit is 40 VDC, 100 mA maximum.
Alarm requires separate power source.
Power supply is 24 VAC.
Terminal VO output is 12-17 VDC.
Setting Up the Stage Control
To lock/unlock the unit for programming
Press the Enter, Up, and Down buttons in
sequence and hold until “- - -” is displayed. Hold
for about 10 seconds until the current condition
value 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.
1d = Direct 1r = Reverse
3. Press the Enter button to save the new mode
of operation.
To change the setpoint
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 values
1. Hold the Enter button down for about
10 seconds. The display will change to HY.
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
value, it is not saved. The control reverts to the old value.
P—MS1 One Stage Electronic Control Installation Bulletin 3
Table 3: Functions and Settings
Mode 1d = Direct 1r = Reverse 1d
Setting Description Setting Range Default
SI Setpoint d, r, relay cut-off point 0 to 99 —
HY Differential (Hysteresis) Difference relative to setpoint or offset at
which the load is switched On or Off
1 to 9 5
LL Low Setpoint Stop Lower limit of end-user setpoint adjustment 0 to HL 99
HL High Setpoint Stop Upper limit of end-user setpoint adjustment LL to 99 90
Cc Anti-short Cycle Timer,
Direct
Time delay between equipment On cycles for
direct stages
0 to 9 minutes 2
CH Anti-short Cycle Timer,
Reverse
Time delay between equipment On cycles for
reverse stages
0 to 9 minutes 0
rt Soft Start Rate at which condition approaches setpoint 0 to 99 minutes/(% or psi) 10
AH High Condition Alarm High condition alarm On, value relative to
setpoint
0 to 50 above setpoint 15
AL Low Condition Alarm Low condition alarm On, value relative to
setpoint
-50 to 0 below setpoint -15
Ad Alarm Differential Condition difference relative to high and low
alarms at which alarm output is switched Off
1 to 9 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 +20 0
Lr Low Range Analog Input Adjusted condition value when sensor input
is 0.0 VDC
-40 to Hr 0
Hr High Range Analog Input Adjusted condition value when sensor input
is 10.0 VDC
Lr to 99 99
PU Display Refresh Rate Time delay between display refreshes 1 to 99 seconds 1
Repair 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, refer to the model number
found on the data plate of the control.
Canadian 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.
FCC 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.
4 P—MS1 One Stage Electronic Control Installation Bulletin
Fault/Alarm Codes
Table 4: Fault/Alarm and Status Codes
Error Code (Flashing on Display) System Status
EE Program failure; control must be replaced. Alarm message displays, other outputs off.
FI Indicates an open or shorted sensor.Alarm message displays. Correct problem and cycle power to
reset.
HI Condition has reached or exceeded
(setpoint + AH).
Alarm message displays. Correct condition to reset.
LO Condition has reached or fallen below
(setpoint - AL).
Alarm message displays. Correct condition to reset.
Ordering Information
Table 5: Specifications
Power Requirements 3.7 VA @ 24 VAC, 50/60 Hz, Class 2 (20-30 VAC)
Ambient Conditions Operating: +14 to +140oF (-10 to +60oC); 0 to 95% RH (non-condensing)
Storage: -22 to +176oF (-30 to +80oC); 0 to 95% RH (non-condensing)
Agency Listings UL Recognized: File E194024, CCN XAPX2
Canadian UL Recognized: File E194024, CCN XAPX8
FCC Compliant per Class A Digital Device, Part 15
Canadian DOC Compliant per Class A, Radio Interference Regulations
Table 6: Ordering Information
Item Code Description
MS1DR24V-11C MS1 DIN Rail Mount Control; 0-10 VDC input; sensor sold separately
HE-6300 Series Humidity Sensor, Wall Mount, 0-100% RH
HE-6310 Series Humidity Sensor, Duct Mount, 0-100% RH
P99V-1C P99 Pressure Transducer, 0-100 psi
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these
specifications, consult Johnson Controls/Penn Refrigeration Application Engineering at (414) 274-5535. Johnson Controls, Inc. shall not be
liable for damages resulting from misapplication or misuse of its products.
Controls Group
507 E. Michigan Street
P.O. Box 423 Printed in U.S.A.
Milwaukee, WI 53201 www.johnsoncontrols.com.
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