MS4PMUHVT Multi-Stage Electronic Temperature Control with ...

Product/Technical MS4PMUHVT 

Issue Date 09/30/02 

MS4PMUHVT Multi-Stage Electronic 

Temperature Control with Relay Pack 

The MS4PMUHVT Multi-Stage Electronic Temperature 

Control is intended for multi-stage temperature control 

applications. The MS4PMUHVT control is specifically 

designed for the control of applications with up to 

four stages in the following configurations: 

• four cooling stages with common setpoint 

• four heating stages with common setpoint 

• four stages with deadband (two heating stages 

and two cooling stages with common setpoint) 

• two independent sets of two dependent stages 

(two heating stages and two cooling stages with 

independent setpoints) 

Figure 1: MS4PMUHVT Multi-Stage Electronic 

Temperature Control with Relay Pack 

❑ Single Package 

Features and Benefits 

Provides the functionality of multiple control 

components at a cost-effective price. 

❑ Easily Readable Display 

❑ Accurate, Interchangeable 

Temperature Sensor 

❑ Nonvolatile Memory 

❑ Heavy-Duty Relays 

Displays main sensor or evaporator sensor 

temperatures; Helps troubleshoot control, 

Provides alarm codes. 

Provides accurate control performance with 

up to 300 feet (91 m) of sensor wiring. (An 

offset is provided for longer wiring.) 

Retains user-programmed settings in event of 

power loss 

Allow direct control of equipment; Reduce 

installation time. 

© 2002 Johnson Controls, Inc. 1 

Part No. 24-8782-5, Rev. C 

www.johnsoncontrols.com 

Code No. LIT-125195

FCC Compliance Statement 

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. 

Canadian Compliance Statement 

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. 

Application 

IMPORTANT: The MS4PMUHVT Multi-Stage 

Temperature Control is intended to control 

equipment under normal operating conditions. 

Where failure or malfunction of the MS4PMUHVT 

control could lead to an abnormal operating 

condition that could cause personal injury or 

damage to the equipment or other property, other 

devices (limit or safety controls) or systems (alarm 

or supervisory systems) intended to warn of, or 

protect against, failure or malfunction of the 

MS4PMUHVT control must be incorporated into 

and maintained as part of the control system. 

The MS4PMUHVT control provides direct control in 

many applications: 

• cooling tower pump and/or fan control 

• rooftop heating or cooling units 

• boiler or pump control 

• space temperature control 

• compressor or chiller staging 

The MS4PMUHVT control has four heavy-duty 

relays. See electrical ratings in Table 6 for more 

information. 

Operation 

Mode Selection 

Mode Selection allows selection of one of several 

modes: 

• Direct mode for cooling applications 

• Reverse mode for heating applications 

• Deadband mode for applications requiring cooling 

and heating with a common setpoint and a 

deadband 

• Independent Setpoint mode for applications 

requiring cooling and heating with one setpoint for 

heating and a second (independent) setpoint for 

cooling 

Stage Control 

Several settings define the control functions for the 

stages: 

• Setpoints and Differentials setting establish the 

temperature-control ranges. 

• Cycle Delays establish a set time interval between 

heating or cooling cycle restarts to avoid excessive 

cycling. 

• Soft Start controls the rate at which temperature 

approaches the Setpoint on power-up or when 

Binary Input Option 3 is selected. This feature is 

useful when starting equipment where merchandise 

in the controlled space needs to be slowly brought to 

the desired temperature (Setpoint). If this feature is 

used, the control activates up to four stages in 

succession to slowly bring the sensed temperature 

to the desired temperature (Setpoint) at the 

user-selected rate. 

Alarm Management 

Several settings define the control functions for alarms: 

• High and Low Temperature Alarms provide 

notification of temperatures that exceed 

user-designated high and low limits. 

• Alarm Time Delay keeps short-duration 

temperature changes from triggering an alarm. 

• Alarm Differential keeps the alarm from cycling 

rapidly on and off due to minor temperature 

fluctuations. 

• Alarm Codes assist in troubleshooting. 

2 MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin

Binary Input Response 

Binary Input Function allows the user to select how 

the control responds to a binary input (switch) if the 

binary input contacts are open for a time (minutes) 

longer than the Binary Input Time Delay. 

Additional Features 

The MS4PMUHVT control uses several other 

settings to control specific features: 

• Keyboard Locking disables/enables change of 

the setpoint and other functions, reducing 

accidental or unauthorized changes of the 

control settings. 

• Self-test Procedure initiates a cycle of all 

outputs and tests all LEDs. See Initiating a 

Manual Self-Test. 

• Dual Sensor Temperature Reset resets the 

setpoint based on the difference between the 

Auxiliary Temperature Sensor (ATS) and the 

Setpoint to provide energy savings. See 

Temperature Reset. 

For additional information about control functions 

and how to program them, see Programming the 

Control and Control Functions. 

Control Module Front Panel 

The control module has an LED display and buttons 

for entering programming information and activating 

various features. 

The display has three LED digits and a minus 

indicator. It displays a temperature range from 

-40 to 176°F (-40 to 80°C) in increments of 1F° or 

C°. The display also features three relay status 

LEDs. 

• LED 1 indicates that the Stage 1 Relay is 

energized. 


energized. 


energized. 

Relay Status LEDs 

Up 

Button 

Installation 

See Mounting and Wiring for installation information. 

Dimensions 

3-5/8 

(92) 2-3/8 

(61) 

7-15/16 

(202) 

1-3/4 

(44) 

3 

(76) 

1-5/8 

(42) 

6 

(152) 

Figure 3: Relay Pack with Mounting Bracket 

Dimensions, in. (mm) 

2-3/4 

(70) 

3 

(75) 

2-5/16 

(58) 

1-3/8 

(35) 

2-11/16 

(68) 

1-1/8 

(28) 

Figure 4: Control Module Dimensions, in. (mm) 

1/4 

(6) 2 

(50) 

78-3/4 

(2000) 

Figure 5: A99BB-200C Sensor Dimensions, in. (mm) 

Enter 

Button 

Down 

Button 

Figure 2: Control Module Front Panel and 

Display 

MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin 3

D4 

Mounting 

The MS4PMUHVT control is not position-sensitive 

but should be mounted for convenient wiring and 

adjustment. The MS4PMUHVT control may be 

mounted as a single unit or the control module and 

relay pack may be separated and mounted 

individually. 

Mounting the MS4PMUHVT Control as a 

Single Unit 

Before mounting the relay pack, ensure that there is 

sufficient space. Follow these steps to mount the 

relay pack: 

1. Hold the MS4PMUHVT control against the 

surface and use it as a template to trace the 

mounting slots. 

2. Drill holes for mounting screws in the holes 

indicated. 

3. Use three screws (No. 8 or No. 10 size) to 

mount the MS4PMUHVT control. 

2. Drill holes for mounting screws in the slots indicated. 

3. Use three screws (No. 8 or No. 10 size) to mount the 

relay pack. 

Mounting the Control Module 

Before mounting the control module, ensure that there is 

sufficient free space [at least 2-3/4 inches (70 mm)] 

behind the mounting surface. Follow these steps to 

mount the control module: 

1. Cut a hole 1-3/16 x 2-13/16 inches (29 x 71 mm). 

2. Remove the mounting clip from the control module. 

3. Insert the control module into the hole. 

4. Install the retaining clip and slide forward to adjust 

for tightness. 

5. Reconnect the wires on the terminals in the relay 

pack to the corresponding terminals on the control 

module. See Figures 7-9. 

Mounting the Control Module and Relay Pack 

Separately 

Mount the relay pack and the control module within 

18 in. (46 cm) of each other. 

Control 

Module 

Mounting 

Clip 

Removing the Control Module from the 

Relay Pack 

Follow these steps to separate the control module 

and the relay pack. See Figures 6-7. 

1. Locate the mounting clip that holds the control 

module to the mounting bracket on the relay 

pack. 

2. Squeeze the forward portion of the mounting clip 

together and slide the mounting clip back to 

remove the mounting clip from the back of the 

control module. 

3. Pull the control module out of the mounting 

bracket on the relay pack. 

4. Disconnect the wiring from the control module 

and the relay pack terminals V1, V2, O1, and 

O2. See Figures 7-9. 

Mounting the Relay Pack 

Before mounting the relay pack, ensure that there is 

sufficient space. Follow these steps to mount the 

relay pack: 

1. Hold the relay pack with mounting bracket 

against the surface and use as a template to 

trace the mounting slots. 

Figure 6: Removing the Mounting Clip and 

Control Module 

D3 

Figure 7: Relay Pack Terminal Positions on the 

Circuit Board 

V2 V1 

O1 

O2 


Wiring 

! 

WARNING: Risk of Electric Shock. 

To avoid electric shock or damage to equipment, 

disconnect all power supplies before wiring any 

connections. More than one disconnect may be 

necessary to completely de-energize equipment. 

Wiring Sensors and Binary Inputs 

Wire the sensors and binary input (if used) as shown 

in Figures 8-9. The Sensor (S1 or S2) and Sensor 

Common (SC) wires are interchangeable when 

using the A99B temperature sensors. The binary 

input shares a common terminal with the sensors. 

Note: Black boxes indicate unused terminals. 

12VAC 

V1 

BLK 

V1 

V2 

WHT 

V2 

O1 

RED 

O1 

O2 

GRN 

O2 

Internal to Control 

Binary 

Input 

(Switch) 

D 

S2 

Auxiliary 

Temperature 

Sensor 

SC 

S1 

Sensor 

Common 

Main 


Sensor 

Figure 8: Wiring the Control Module MS 

Loosen screw to open terminal; 

tighten screw to secure wiring. 

Table 1: Sensor Wire Size and Length 

Wire Size and Length 

18 AWG 20 AWG 22 AWG 

Offset 

300-599 ft 190-374 ft 120-239 ft 1 F° 

600-899 ft 375-564 ft 240-349 ft 2 F° 

900+ ft 565+ ft 350+ ft 3 F° 

165-329 m 105-204 m 65-129 m 1 C° 

330-495 m 205-310 m 130-195 m 2 C° 

Wiring the Relay Pack 

! 

WARNING: Risk of Electric Shock. 

To avoid electric shock or damage to equipment, 

disconnect all power supplies before wiring any 

connections. More than one disconnect may be 

necessary to completely de-energize equipment. 

See Figure 10 for arrangement of terminals on the 

terminal block in the relay pack. See Figures 11-12 for 

sample wiring diagrams. Follow these wiring guidelines: 

• All wiring must conform to the National Electrical 

Code and local regulations. 

• Use 14 AWG copper wire for motor loads up to 12 FLA 

and non-inductive loads up to 15 A. 

• Use 12 AWG copper wire with an insulation rating of 

75°C (minimum) for motor loads up to 16 FLA and 

non-inductive loads up to 20 A. 

V1 V2 O1 O2 

D 

S2 SC S1 

• Use wire no longer than 50 feet (15 m). 

• All circuits must have a common disconnect and be 

connected to the same pole of the disconnect. 

V1 V2 O1 O2 

D S2 SC S1 

Relay 

Pack 

Terminal 

Block 

Insert wiring here. 

Note: Black boxes indicate unused terminals. 

Figure 9: Rear View of the Control Module 

Use Temperature Sensor Offset to compensate for 

sensor leads longer than 300 ft (if °F is used) or 

165 m (if °C is used). See Table 1 and Temperature 

Management Functions: Temperature Sensor Offset. 

Terminal 

Labels 

on 

Circuit 

Board 

NO1 CM1 L2 120 (Not NO2 CM2 

Used) NO4 

NO3 

NC1 

CM3 

NC3 

240 

NC2 

CM4 

Figure 10: Relay Pack Terminal Block 

NC4 


L1 

Note: All circuits must have a common disconnect and be connected to the same pole of the disconnect. 

Internal to Relay Pack 

L2 

Control Relay 1 Control Relay 2 Control Relay 3 Control Relay 4 

240 120 NO1 CM1 NC1 NO2 CM2 NC2 NO3 CM3 NC3 NO4 CM4 NC4 

Load 1 Load 2 Load 3 Load 4 

Figure 11: Typical 240 VAC Relay Pack Wiring Connections 

120 VAC 

Note: All circuits must have a common disconnect and be connected to the same pole of the disconnect. 

Neutral 

Internal to Relay Pack 

Control Relay 1 Control Relay 2 Control Relay 3 Control Relay 4 

240 120 NO1 CM1 NC1 NO2 CM2 NC2 NO3 CM3 NC3 NO4 CM4 NC4 

Load 1 Load 2 Load 3 Load 4 

Figure 12: Typical 120 VAC Relay Pack Wiring Connections 


Modes of Operation 

The MS4PMUHVT control performs temperature 

management for multi-stage applications. It can 

automatically adjust the setpoint to save energy, 

based on readings from the auxiliary temperature 

sensor and the function settings. 

The illustrations on the following pages show the 

modes of operation available on the MS4PMUHVT 

control. 

Direct Mode (Cooling) and Reverse Mode (Heating) 

Direct mode is used for cooling applications. (See 

Figure 13.) Reverse mode is used for heating 

applications. (See Figure 14.) Where desirable, stages 

may overlap or have space between them. 

Setpoint is the desired temperature. 

In Direct Mode (cooling applications), when Setpoint is 

reached on a temperature drop, the Normally Open 

(N.O.) relay contacts open, ending the On cycle of 

Stage 1. 

In Reverse Mode (heating applications), when Setpoint 

is reached on a temperature rise the N.O. relay 

contacts open, ending the On cycle of Stage 1. 

Differential is the operational range of Stage 1. 

Setpoint 2 is the offset from Setpoint that activates 


Differential 2 is the operational range of Stage 2. 






Interstage Time Delay is the minimum amount of time 

between two successive stages when multiple stages 

are called for in rapid sequence. 


On 

Stage 

1 

Interstage 

Time 

Delay 

Off 


On 

Off 


1 

On 


2 

Off 

Differential 

Setpoint 

Interstage 

Time 

Delay 

On 


3 

Off 

Differential 2 

Interstage 

Time 

Delay 

Setpoint 2 

(Offset from 

Setpoint) 


4 

Off 



Setpoint 4 

(Offset from 

Setpoint) 

Setpoint 3 

(Offset from 

Setpoint) 

Figure 13: Direct Mode (Cooling) 

Differential 

On 

Interstage 

Time 

Delay 

Setpoint 

Off 


2 

Setpoint 2 

(Offset from 

Setpoint) 

Setpoint 3 

(Offset from 

Setpoint) 


On 

Interstage 

Time 

Delay 

Off 


3 


Off 


4 

On 

Interstage 

Time 

Delay 

Time 

Setpoint 4 

(Offset from 

Setpoint) 


Time 

Figure 14: Reverse Mode (Heating) 


Deadband Mode 

Deadband mode is used for applications requiring 

cooling and heating. Where desirable, stages may 

overlap or have space between them. See Figure 15. 

Setpoint is the desired temperature. 

Setpoint 2 is width of the deadband, which is centered 

on Setpoint. 

In Direct Mode (cooling applications), the N.O. relay 

contacts open, ending the On cycle when 

Setpoint + (1/2 Setpoint 2) is reached on a 

temperature drop. 

In Reverse Mode (heating applications), the N.O. relay 

contacts open, ending the On cycle when Setpoint - 

(1/2 Setpoint 2) is reached on a temperature rise. 



Setpoint 3 is the offset from the low end of the 

deadband that activates Stage 3. 


Setpoint 4 is the offset from the high end of the 

deadband that activates Stage 4. 






Interstage 

Time Delay 

On 

Cooling 

Stage 4 


On 



Off 

Setpoint 4 

(Offset from Stage 2) 

Off 

Setpoint 

Off 

Setpoint + (1/2 Setpoint 2) 

Setpoint - (1/2 Setpoint 2) 

Setpoint 2 (Deadband) 

(Centered on Setpoint) 


Differential 

Off 

Setpoint 3 

(Offset from Stage 1) 

On 



Heating 

On 

Interstage 

Time Delay 

Time 

Figure 15: Deadband Mode 


Independent Setpoint Mode 

Independent Setpoint mode is used for applications 

requiring cooling and heating. Where desirable, stages 

may overlap or have space between them. See 

Figure 16. 

Setpoint is the desired heating temperature. It is the 

basis for the reverse stages. 

In Reverse mode (heating applications), when Setpoint 

is reached on a temperature rise, the N.O. relay 

contacts open, ending the On cycle. 

Setpoint cannot be set higher than Setpoint 2, nor can 

Setpoint 2 be set lower than Setpoint. If overlapping 

adjustment is attempted, the setting that is not being 

adjusted will adopt the value of the setting that is being 

adjusted. 


Setpoint 2 the desired cooling temperature 

programmed by the user. It is the basis for the direct 

stages. 

In Direct mode (cooling applications), when Setpoint is 

reached on a temperature drop, the N.O. relay 

contacts open, ending the On cycle. 





Setpoint 4 is the offset from Setpoint 2 that activates 







Interstage 

Time Delay 

Cooling 





Setpoint 4 

Setpoint 


Differential 

Setpoint 3 



Heating 

Interstage 

Time Delay 

Time 

Figure 16: Independent Setpoint Mode 


Programming the Control 

Use this section to program the control module. After 

programming, the control module retains its 

programmed settings, even in the event of a power 

failure or power-down. 

Using the Control Module 

During normal operation, the display shows the main 

sensor temperature. See Figure 2. 

• Press Up or Down repeatedly to display the main 

sensor temperature, auxiliary sensor temperature 

and the binary input status. 

• Press Enter to display the Setpoint value. 

After 15 seconds of inactivity, the display returns to 

main sensor temperature. 

Unlocking or Locking Access to Programming 

1. In sequence, press and hold Enter, Up, 

and Down. 

2. Hold these buttons until “- - -” displays. 

3. Continue holding until the main sensor 

temperature displays (approximately 

10 seconds). 

Selecting the Mode of Operation 

1. At the same time, press and hold 

Enter and Down for approximately 

three seconds. 

2. Press Up or Down until the display 

code for the desired mode displays: 

4d = Direct mode (cooling) 

4r = Reverse mode (heating) 

4b = Deadband mode (both) 

4i = Independent Setpoint mode (both) 

3. Press Enter to save the new setting. 

Changing the Setpoint in Independent Setpoint 

Mode and Changing Other Function Settings in 

All Modes 

1. Press and hold Enter for about 10 

seconds. The display changes to HY. 

(The display shows S1 if in Mode 4i.) 

2. Press Up or Down until the desired 

function displays. See Table 4 and 

Control Functions. 

3. Press Enter. The function’s existing 

value displays. 

4. Press Up or Down until the desired 

setting value displays. 

5. Press Enter to save the new value. 

After 10 seconds of inactivity, the 

display returns to normal operation. 

Note: If Enter is not pressed, the new value is not 

saved, and the control reverts to the previous saved 

value. 

Initiating a Manual Self-Test 

IMPORTANT: Disconnect controlled loads 

before running the self-test procedure. Reconnect 

controlled loads and cycle power to resume normal 

operation. 

1. In sequence, press and hold Up and 

then Down. 

2. Hold for five seconds. 

Note: If Enter is not pressed, the new mode of 

operation is not saved, and the control reverts to the 

previous mode of operation. 

Changing the Setpoint in Direct, Reverse, and 

Deadband Modes 

1. Press and hold Enter for 

approximately three seconds. 

2. Release Enter when the new Setpoint 

value displays. 

3. Press Up or Down to display the new 

Setpoint value. 

4. Press Enter to save the new setting. 

Note: If Enter is not pressed, the new Setpoint 

value is not saved, and the control reverts to the 

previous Setpoint value. 


Control Functions 

Temperature Management Functions 

SI (Displays in Mode 4i only) Setpoint is the primary 

temperature setting (°F or °C) programmed by the 

user. For information on function in each mode, see 

Modes of Operation. 

S2, S3, S4 Setpoint 2, Setpoint 3, Setpoint 4 depend 

on the mode used. For information on function in each 

mode, see Modes of Operation. 

30 o F 


Setpoint 

Sensed 


HI, H2, H3, H4 Differentials are the difference (F° or 

C°) between the value at which an output is switched 

Off and the value at which an output is switched On 

(relay contacts closing and opening, initiating or 

ending an On cycle). For information on function in 

each mode, see Modes of Operation. 

HL, LL High and Low Setpoint Stops are 

temperature values (°F or °C) that define how high or 

low the primary Setpoint may be adjusted. Setpoint 

stops deter unauthorized or accidental overadjustment 

of Setpoint. 

On 

Off 

On 

Off 

Load Demand 

Output Status 

20 o F 

Output Status 

(up to four stages) 

Time (Minutes) 

2 4 6 8 10 12 14 16 18 

Figure 18: Soft Start 

Soft Start Example: 

Temperature = 20° 

Setpoint = 30° 

Soft start = 2 minutes 

Rate of Increase = 

Soft start x (setpoint – sensor reading) 

20 

On 

Off 

Cycle Delay 

Time 

Figure 17: Cycle Delay 

Cc Cycle Delay, Cooling establishes the minimum 

time in minutes between two subsequent On cycles of 

cooling (direct) stages. See Figure 17. 

CH Cycle Delay, Heating establishes the minimum 

time in minutes between two subsequent On cycles of 

heating (reverse) stages. See Figure 17. 

iS Interstage Time Delay is the minimum amount of 

time between two successive stages when multiple 

stages are called for in rapid sequence. 

rt Soft Start controls the rate at which the controlled 

temperature is allowed to approach Setpoint on power 

up, both initially and when the binary input is 

configured as remote shutoff. The setting is 

minutes/temperature units, such as minutes/F°. See 

Figure 18. 

Controlled temperature increases by 1° every 

two minutes, until the setpoint temperature is 

reached. To go from 20° to 30° takes 20 minutes. 

So Temperature Sensor Offset allows compensation 

for temperature differences between actual and 

displayed temperature, such as when using long 

sensor leads. See Table 1 to determine the 

temperature value to compensate for long sensor lead 

extensions. 

Un Temperature Units Used allows selection of 

Fahrenheit or Celsius temperature scale. 

PU Display Refresh Rate establishes the time delay 

(seconds) between updates of the temperature 

display. 

Lc, Uc Heating Reset and Cooling Reset are 

automatic shifts of the setpoint, based on the 

temperature at the Auxiliary Temperature Sensor 

(ATS). See Temperature Reset for more information. 

NC Non-compensated Band establishes the 

temperature range (F° or C°) over which reset does 

not take place. 


Alarm Management Functions 

AH High Temperature Alarm establishes the 

temperature relative to Setpoint (F° or C°) at which the 

control goes into a high temperature alarm condition. 

(The temperature value is added to the Setpoint.) 

AL Low Temperature Alarm establishes the 

temperature relative to Setpoint (F° or C°) at which the 

control goes into a low temperature alarm condition. 

(The temperature value is subtracted from the 

Setpoint.) 

AH, AL High and Low Temperature Alarms are 

disabled during defrost and for 20 minutes after the 

defrost cycle. These alarms are also disabled for 

20 minutes after startup. 

Ad Alarm Differential establishes the difference (F° 

or C°) between the alarm activation temperature and 

the alarm deactivation temperature. 

Alarm Differential Example - Cooling Applications: 

Setpoint = 40°F 

High Temperature Alarm = 15F° 

Alarm Differential = 2F° 

When the room temperature exceeds 55°F 

(40+15=55°F) for a time greater than the alarm 

time delay setting, the alarm message is 

displayed; however, it will reset after the 

temperature drops below 53°F (40+15-2=53°F). 

At Alarm Time Delay establishes the time delay 

(minutes) between reaching a high or low temperature 

alarm condition and displaying an alarm message on 

the display. This function reduces alarm oscillation and 

nuisance alarms caused by temperatures that 

temporarily exceed alarm setpoint temperatures. 

Binary Input Functions 

iF Binary Input Mode allows selection of how the 

Normally Closed (N.C.) binary input activates the 

stage control contacts. 

Binary Input Mode can be disabled or can provide one 

of three predetermined responses to the binary input. 

(If a set of stage control contacts are used to control 

an external alarm, this function should be disabled.) 

• Shutoff and Alarm Signaling - If the binary input 

contact is open for a time longer than that set 

through the Binary Input Time Delay, the stage 

control contacts are switched Off, and an alarm 

message (A1) is displayed. 

• Setback - If the binary input contact is open for a 

time longer than that set through the Binary Input 

Time Delay, the setpoints are shifted by Setback. 

Reverse setpoints (heating) decrease. Direct 

setpoints (cooling) increase. 

• Remote Shutoff of the outputs. - If the binary 

input contact is open for a time longer than that set 

through the Binary Input Time Delay, the stage 

control contacts are switched Off. 

id Binary Input Time Delay establishes the time 

delay (minutes) between the binary input signal 

reaching the control and activation of the response 

selected by Binary Input Mode. 

Sb Setback determines the value of the Setpoint shift 

when the binary input is open and Setback is the 

response selected by Binary Input Mode. 


Temperature Reset 

The control module uses non-compensated band 

and heating reset or cooling reset to automatically 

adjust the setpoint. These functions appear only when 

the Auxiliary Temperature Sensor (ATS) is connected. 

If the ATS is connected after the control module is 

powered up, the control module must be powered 

down and then powered up for these functions to 

appear. 

Non-Compensated Band 

Non-Compensated Band (NCB) is a temperature 

differential from setpoint. Within the range of this 

differential, variations in the ATS temperature do not 

cause a temperature reset. See Heating Reset and 

Cooling Reset for more information. 

Note: When Deadband mode or Independent 

Setpoint mode are used, NCB is the same for heating 

stages and cooling stages. 

Heating Reset 

When (Setpoint – ATS Temperature) > NCB, the 

control adjusts the heating setpoint by the following 

amount: 

[ATS Temp. – (Setpoint – NCB)] / Heating Reset 

Heating reset only affects the setpoint for heating 

stages. 

Heating 

Reset 

Example 

Step 1 

Step 2 


ATS Temperature = 42°F 

NCB = 20F° 

Heating Reset = 2F° 

[ATS Temperature – (setpoint–NCB)] / heating 

reset = [42 – (70 – 20)]/2 = -4 

setpoint + reset 

70 + (-4) = 66 

Setpoint is reset to 66°F to save energy. See 

Figure 19. 

1° 

Heating 

Reset 

Setpoint 

Process 


Sensor 

70° 

Cooling Reset 

When (ATS Temperature - Setpoint) > NCB, the 

control adjusts the cooling setpoint by the following 

amount: 

[ATS – (Setpoint + NCB)] / Cooling Reset 

Cooling reset only affects the setpoint for cooling 

stages. 

Cooling 

Reset 

Example 

Step 1 


ATS Temperature= 92°F 

NCB = 10F° 

Cooling Reset = 2F° 

ATS Temperature – (setpoint + NCB) / cooling 

reset = [92 – (70 + 10)] / 2 = 6 

Step 2 setpoint + reset 

70 + 6 = 76 

Setpoint is reset to 76°F to save energy. See 

Figure 20. 

Process 


Sensor 

76° 

70° 

70° 

Setpoint 

Non- 

Compensated 

Band 

NCB = 10° 

1° 

Cooling 

Reset 

80° 92° 

Auxiliary Temperature Sensor (ATS) 

Figure 20: Cooling Reset 

Non- 

Compensated 

Band 

NCB = 20° 

66° 

42° 50° 70° 

Auxiliary Temperature Sensor (ATS) 

Figure 19: Heating Reset 


Table 2: Function Settings in Order of Programming in Control Module 

Display Code Function Useable Setting Range and Unit Value Factory-Set 

Values 

4d = Direct 

4r = Reverse 

4b = Deadband 

4i = Independent 

setpoints 

Modes of Operation 

4d = Direct 

4r = Reverse 

4b = Deadband 

4i = Independent setpoints 

4d 

SI (Mode 4i only) Setpoint 4d, 4r, 4b = -40 to 99°F (-40 to 80°C) 

4i = Low Setpoint Stop to High Setpoint Stop 

HI Differential 1 1 to 9F° (1 to 9C°) 5 (F°) 

S2 ∆ Setpoint 2 4d, 4r = 1 to 40F° (1 to 40C°) 

4b = 2 to 40F° (2 to 40C°) 

4i = Low Setpoint Stop to High Setpoint Stop 

— 

5 (F°) 

H2 Differential 2 1 to 9F° (1 to 9C°) 5 (F°) 

S3 ∆ Setpoint 3 1 to 40F° (1 to 40C°) 5 (F°) 


S4 ∆ Setpoint 4 1 to 40F° (1 to 40C°) 5 (F°) 


LL Low Setpoint Stop -40°F (-40°C) to High Setpoint Stop 32 (°F) 

HL High Setpoint Stop Low Setpoint Stop to 99°F (80°C) 90 (°F) 

Cc Cycle Delay, Cooling 0 to 9 minutes 2 (minutes) 

CH Cycle Delay, Heating 0 to 9 minutes 0 (minutes) 

rt Soft Start 0 to 99 minutes/degrees 10 

AH High Temperature Alarm 0 to 50F° (0 to 50C°) 15 (F°) 

AL Low Temperature Alarm -50 to 0F° (-50 to 0C°) -15 (F°) 

Ad Alarm Differential 1 to 9F° (1 to 9C°) 5 (F°) 

At Alarm Time Delay 0 to 99 minutes 15 (minutes) 

So Temperature Sensor Offset -20 to 20F° (-20 to 20C°) 0 (F°) 

Un Temperature Units Used 0 = °C 

1 = °F 

PU Display Refresh Rate 1 to 99 seconds 1 (second) 

iF Binary Input Mode 0 = No Response to Binary Input 

1 = Shutoff and Alarm Signaling 

2 = Setback Mode 

3 = Remote Shutoff 

1 (°F) 

Sb Setback -20 to 20F° (-20 to 20C°) 10 (F°) 

0 (no response) 

id Binary Input Time Delay 0 to 99 minutes 0 (minutes) 

iS Interstage Time Delay 3 to 90 seconds 3 (seconds) 

Lc Heating Reset 0 to 6°/ ° 4 

Uc Cooling Reset 0 to 6°/ ° 4 

NC Non-Compensated Band 0 to 20F° (0 to 20C°) 8 

Note: Temperature Reset Functions (Heating Reset, Cooling Reset, Non-compensated Band) are only enabled after the 

auxiliary sensor is installed and power is cycled. 


Alarm and Fault Display Codes 

These alarm and fault codes flash on the LED display 

when the control detects the following faults: 

Table 3: Alarm Display Codes (Flashing) 

Display 

Meaning 

Code 

F1 

A1 

OF 

HI 

LO 

Indicates an open or shorted main temperature 

sensor. 

Binary input is open for longer than the Binary Input 

Time Delay and Binary Input Mode Option 1 is 

selected. 

Binary input is open and Binary Input Mode 

Option 3 selected. 

Main sensor temperature has reached or exceeded 

the High Temperature Alarm value. 

Main sensor temperature has reached or fallen 

below the Low Temperature Alarm value. 

System Status 

Alarm message displays. Correct problem and cycle 

power to reset control. 

Control output is switched off; alarm message displays. 

Correct the condition to reset. 

Control output is switched off. Close the digital input to 

reset. 

Alarm message displays. Correct the condition to reset. 

Alarm message displays. Correct the condition to reset. 

EE Program failure Alarm message displays, other outputs off. Replace 

control. 

Table 4: Status Codes (Steady) 

Status Code Indicates: 

On 

Auxiliary temperature sensor (S2) is not connected or, if it is connected, the sensor (or binary input) is 

open or shorted. 

OF 

Binary input is closed. 

Ordering Information 

Table 5: Ordering Information 

Item Code Description Shipping weight 

MS4PMUHVT-11C Relay pack temperature control with two A99B sensors 2.9 lb (1320 g) 

MS4PM12C-11C Replacement control module for use in relay pack only 1.6 lb (726 g) 

RP4MSUHV-1C Relay pack without control module 2.3 lb (1060 g) 

A99BB-200C Sensor, cable length: 6-1/2 ft (2 m) 0.13 lb (60 g) 

Repair and Replacement 

Field repair of the control should not be made. In case 

of a defective or improperly functioning control, please 

check with your nearest Johnson Controls/PENN 

representative. 

Relay Electrical Ratings 

Relay Ratings in Table 6 are for ambient temperatures 

in the range -40 to 111°F (-40 to 44°C). Derate 

electrical ratings 3.45% per 1F° in the range 

111 to 140°F. Derate electrical ratings 6.25% per 1C° 

in the range 44 to 60°C. 


Table 6: SPDT Relay Electrical Ratings 

Single-Phase Ratings 

24 VAC 120 VAC 208 VAC 240 VAC 

Horsepower Rating — 1/3 3/4 1 

AC Full Load Amperes — 7.2 7.6 8 

AC Locked Rotor Amperes — 43.2 45.6 48 

Non-Inductive Amperes — 8 8 8 

Pilot Duty (VA) 50 325 625 750 

Technical Specifications 

Product 

Electrical Ratings See Table 6. 

Frequency 

MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack 

60 Hz 

Power Requirements 120/240 VAC ±10% 

Power Consumption 

Accuracy 

Sensor Input Range 

10 VA @ 120/240 VAC 

±1.8F° (±1C°) 

A99B Sensor Cable 6-1/2 ft (2 m) 

Ambient Operating 

Conditions 

Ambient Storage 

Conditions 

-40 to 158°F (-40 to +70°C) 

MS4PMUHVT-11C: 

MS4PM12C-11C: 

RP4MSUHV-1C: 

MS4PMUHVT-11C: 

MS4PM12C-11C: 

RP4MSUHV-1C: 

Dimensions (H x W x D) See Figures 3-5. 

Agency Listings 

Emissions Compliance FCC (US) 

DOC (Canada) 

Shipping Weight See Table 5. 

UL Listed (US), File SA516, CCN SDFY 

UL Listed (Canada), File SA516, CCN SDFY7 

+14 to +140°F (-10 to +60°C); 0 to 95 % RH (noncondensing) 

+14 to +140°F (-10 to +60°C); 0 to 95 % RH (noncondensing) 

-40 to +140°F (-10 to +60°C); 0 to 95 % RH (noncondensing) 




The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these 

specifications, consult Johnson Controls/Penn Application Engineering at 1-800-275-5676. 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 

Milwaukee, WI 53201 

Published in U.S.A. 

www.johnsoncontrols.com

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