MS2 Two Stage Electronic Temperature Control

Вид документа	Інструкція з монтажу
Виробник	JCI
Код документа	ms2-two-stage-electronic-temperature-control
Група обладнання	MS2 Multi‐Stage Temperature Controller
Сторінок	5
Мова документа	англійська
Розмір файлу	0.3 МБ

Текст документа

FANs 125, 121
Temperature Controls Section A
Installation Bulletin
Issue Date 1199

INSTALLATION BULLETIN

MS2 Two Stage Electronic Temperature Control

W iring
IMPORTANT: All MS2 controls are designed for !
use only as operating controls. WARNING: Risk of Electrical Shock.
Where an operating control Disconnect power supply before
failure would result in personal making electrical connections to
injury or loss of property, it is the avoid possible electrical shock or
responsibility of the installer to equipment damage.
add devices (safety, limit
controls) or systems (alarm,
supervisory systems) that protect Follow these wiring guidelines:
against, or warn of, control
failure.  All wiring must conform to the National Electric
Code and local regulations.
 Make all wiring connections using adequate gauge
Refer to the MS Series Multi-Stage Electronic copper conductors only. Connectors are rated for
Temperature Controls Product Bulletin, LIT-125198, for 14-22 AWG wiring.
necessary information on operation and performance Refer to Rating Table for more information.
specifications for this product. Internal to Control
Terminal Not Used

C1  C2  V1 V2 D SC
M ounting
Binary
Stage  Stage 
The MS2 control is not position-sensitive but should be Power Input Process
mounted for convenient wiring and adjustment. Supply Sensor
Binary and Sensor Common
To mount the DIN Rail Mount version, install the DIN
rail where appropriate. Snap the control onto the rail in Figure 1: MS2 Panel Mount Wiring
position.
To mount the Panel Mount version, ensure that there is Sensor Common Binary
Input
sufficient space behind the panel. At least Process Binary Stage 
2-3/4 inches (70 mm) are needed. Make a cutout Sensor Common
1-3/16 by 2-13/16 inches (29 by 71 mm). Remove S1 SC D CD C2 
retaining clip from control. Insert the control into the
hole. Install retaining clip and adjust for tightness. Internal to Control
V1 V2 C1 
Terminal Not Used
Power Stage 
Supply
Refer to Rating Table for more information.

Figure 2: MS2 DIN Rail Mount Wiring

© 1999 Johnson Controls, Inc. 1
Part No. 24-7664-1725, Rev. A www.johnsoncontrols.com
Code No. LIT-125209
S etting Up the Stage Control
Use this table, with function So, to compensate for long To lock/unlock the unit for programming
sensor wire. Press the Enter, Up, and Down buttons
simultaneously and hold until “- - -” is displayed.
Table 1: Sensor Wire Size and Length Hold for about 10 seconds until the current
temperature is displayed. This toggles the
18 AWG 20 AWG 22 AWG Offset keypad between locked and unlocked.
300-599 ft 190-374 ft 120 -239 ft 1F°
91-183 m 58-114 m 36-73 m 1C° To run the self test procedure
600-899 ft 375-564 ft 240-349 ft 2F° IMPORTANT: Disconnect loads before beginning self-test
183-274 m 114-172 m 73-107 m 2C° procedure. Cycle power to resume normal
900+ ft 565+ ft 350+ ft 3F° operation.
274+ m 172+ m 107+ m 3C°
Press the Up and Down buttons in sequence,
and hold for 5 seconds.
Table 2: Rating Table
Rating Category 120 240 24
To select the mode of operation
VAC VAC VDC
1. Press and hold the Enter and Down buttons
Horsepower 1/4 1/2 - simultaneously for approximately 7 seconds.
Full Load Amperes 5.8 4.9 -
Locked Rotor Amperes 34.8 29.4 - 2. Press the Up or Down button until the desired
Inductive (non-motor) 8 8 8 setting is shown.
Amperes 2d = Direct (cool)
Pilot Duty VA 275 450 - 2r = Reverse (heat)
Relay outputs must not exceed 20 amperes total 2b = Deadband
2i = Independent Setpoint
connected load. Power supply is 24 VAC.
3. Press the Enter button to save the new mode

F CC Compliance of operation.

This equipment has been tested and found to comply To change the setpoint (modes b, d, and r only)
with the limits for a Class A digital device pursuant to 1. Hold the Enter button down for 3 seconds.
Part 15 of the FCC Rules. These limits are designed to The display will change to show the setpoint.
provide reasonable protection against harmful 2. Press the Up or Down button until you reach
interference when the equipment is operated in a the new setpoint.
commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if 3. Press the Enter button to save the new
not installed and used in accordance with the setpoint.
instruction manual, may cause harmful interference to Note: If you do not press the Enter button after selecting the new
radio communications. Operation of this equipment in setpoint, it is not saved. The control reverts to old setpoint.
a residential area is likely to cause harmful
To program other settings (modes b, d, r only) or to
interference, in which case the user will be required to
program setpoints and settings (mode i only)
correct the interference at his/her own expense.
1. Hold the Enter button down for about
10 seconds. The display will change to HY.
C anadian DOC Compliance (The display shows S1 if in Mode i.)
2. Press the Up or Down button until the desired
This digital apparatus does not exceed the Class A setting is shown.
limits for radio noise emissions from digital apparatus
set out in the Radio Interference Regulations of the 3. Press the Enter button. The setting’s current
value is displayed.
Canadian Department of Communications.
4. Press the Up or Down button until the desired
D isplay value is shown.

Press Up and Down buttons to scroll through process 5. Press the Enter button to save the new value.
temperature and binary input status (On or OF). After After 10 seconds of inactivity, the display will
15 seconds of inactivity, the display shows the process return to its normal function.
temperature. Note: If you do not press the Enter button after selecting the new

2 A—MS2 Two Stage Electronic Temperature Control Installation Bulletin
value, it is not saved. The control reverts to the old value.

A—MS2 Two Stage Electronic Temperature Control Installation Bulletin 3
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 -40 to 99°F —
Mode i: heating independent setpoint (-40 to 70°C)
HI Differential (Hysteresis) Temperature difference relative to setpoint or offset at 1 to 9F° (1 to 9C°) 5
which the load is switched On or Off
S2 Setpoint 2 (Offset) Modes d, r: difference between setpoint and Stage 2 d, r: 1 to 40F° 5
Mode b: deadband (centered on setpoint) (1 to 40C°)
Mode I: cooling independent setpoint b: 2 to 40F°
(2 to 40C°)
I: LL to HL
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, Time delay between equipment On cycles for cooling 0 to 9 minutes 2
Cool stages
CH Anti-short Cycle Timer, Time delay between equipment On cycles for heating 0 to 9 minutes 0
Heat stages
rt Soft Start Rate at which process temperature approaches setpoint 0 to 99 10
minutes/degrees
AH High Temperature Alarm High temperature alarm setpoint relative to main setpoint 0 to 50F° (0 to 50C°) 15
above setpoint
AL Low Temperature Alarm Low temperature alarm setpoint relative to main setpoint -50 to 0F° (-50 to 0C°) -15
below setpoint
Ad Alarm Differential Temperature difference relative to high and low alarms at 1 to 9F° (1 to 9C°) 5
which alarm output is switched Off
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° 0
(-20 to +20C°)
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 0
1 = Shutoff/alarm
signaling
2 = Setback
3 = Remote shutoff
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 When requesting a replacement, reference the model
improperly functioning control, contact your nearest number found on the data plate of the control.
authorized Johnson Controls/PENN distributor.

4 A—MS2 Two Stage Electronic Temperature Control Installation Bulletin
F ault/Alarm Codes
Table 4: Status Codes (steady on display)
Status Code Indicates
On Binary Input is closed.
OF Binary Input is open.

Table 5: Fault/Alarm 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 temperature sensor. Alarm message displays. Correct problem and cycle
power to reset.
AI Binary input (IF) Option 1 selected and binary input open Control output is switched off; alarm message displays.
for longer than time delay (id). Correct condition to reset.
DF Binary input (IF) Option 3 is selected and binary input open. Control output is switched off. Close binary input to reset.
HI Temperature has reached or exceeded (setpoint + AH). Alarm message displays. Correct condition to reset.

LO Temperature has reached or fallen below (setpoint - AL). Alarm message displays. Correct condition to reset.

O rdering Information
Table 6: Specifications
Power Requirements 3.7 VA @ 24 VAC, 50/60 Hz, Class 2 (20-30 VAC)

Ambient Conditions Operating: +14 to +140°F (-10 to +60°C); 0 to 95% RH (non-condensing)
Storage: -22 to +176°F (-30 to +80°C); 0 to 95% RH (non-condensing)
Accuracy +1.8 F° (+1C°)

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 7: Ordering Information
Item Code Description
MS2DR24T-11C MS2 DIN Rail Mount Control; A99BB-200C sensor included
MS2PM24T-11C MS2 Panel Mount Control; A99BB-200C sensor included
A99BB-200C A99B Temperature Sensor; Cable length 6-1/2 ft (2 m)

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

A—MS2 Two Stage Electronic Temperature Control Installation Bulletin 5

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