Johnson Controls MS4PMUHVT Bedienungsanleitung

Product/Technical MS4PMUHVT

Issue Date 09/30/02

Part No. 24-8782-5, Rev. C www.johnsoncontrols.com

Code No. LIT-125195

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

Features and Benefits

Single Package

Provides the functionality of multiple control

components at a cost-effective price.

Easily Readable Display

Displays main sensor or evaporator sensor

temperatures; Helps troubleshoot control,

Provides alarm codes.

Accurate, Interchangeable

Temperature Sensor

Provides accurate control performance with

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

offset is provided for longer wiring.)

Nonvolatile Memory

Retains user-programmed settings in event of

power loss

Heavy-Duty Relays

Allow direct control of equipment; Reduce

installation time.

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

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.

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

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.

LED 2 indicates that the Stage 2 Relay is

energized.

LED 3 indicates that the Stage 3 Relay is

energized.

Enter

Button

Down

Button

RelayStatusLEDs

Figure 2: Control Module Front Panel and

Display

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)

1-5/8

(42)

(152)

(76)

Figure 3: Relay Pack with Mounting Bracket

Dimensions, in. (mm)

2-5/16

(58)

2-3/4

(70)

(75)

1-3/8

(35)

1-1/8

(28)

2-11/16

(68)

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

1/4

(6) 2

(50)

78-3/4

(2000)

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

4MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin

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.

Mounting the Control Module and Relay Pack

Separately

Mount the relay pack and the control module within

18 in. (46 cm) of each other.

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.

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

Clip

Control

Module

Figure 6: Removing the Mounting Clip and

Control Module

V2V1

O1 O2

Figure 7: Relay Pack Terminal Positions on the

Circuit Board

MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin 5

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.

SC S1S2

Internal to Control

Auxiliary

Temperature

Sensor

Binary

Input

(Switch)

Main

Temperature

Sensor

Common

12VAC

Note: Black boxes indicate unused terminals.

BLK

WHT

RED

GRN

Figure 8: Wiring the Control Module MS

Loosen screw to open terminal;

tighten screw to secure wiring.

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.

Table 1: Sensor Wire Size and Length

Wire Size and Length

Offset

18 AWG

20 AWG

22 AWG

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.

Use12 AWGcopper wire with an insulation rating of

75°C (minimum) formotor loads up to 16 FLAand

non-inductive loads up to 20 A.

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.

Relay

Pack

Terminal

Block

Terminal

Labels

Circuit

Board

NO1 CM1 L2 120 (Not

Used) NO2 CM2 NO4

NC4CM4NC2

240

NC3

CM3

NC1

NO3

Figure 10: Relay Pack Terminal Block

6MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin

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

L1 L2

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

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

Internal to Relay Pack

Load 1 Load 2 Load 3 Load 4

Figure 11: Typical 240 VAC Relay Pack Wiring Connections

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

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

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

Internal to Relay Pack

Load 1 Load 2 Load 3 Load 4

120 VAC Neutral

Figure 12: Typical 120 VAC Relay Pack Wiring Connections

MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin 7

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

Stage 2.

Differential 2 is the operational range of Stage 2.

Setpoint 3 is the offset from Setpoint that activates

Stage 3.

Differential 3 is the operational range of Stage 3.

Setpoint 4 is the offset from Setpoint that activates

Stage 4.

Interstage Time Delay is the minimum amount of time

between two successive stages when multiple stages

are called for in rapid sequence.

Temperature

Off

Setpoint

Setpoint 2

(Offset from

Setpoint)

Setpoint 3

(Offset from

Setpoint)

Setpoint 4

(Offset from

Setpoint)

Time

Differential

Stage

Interstage

Time

Delay

Interstage

Time

Delay

Interstage

Time

Delay

Differential 2

Differential 3

Differential 4

Figure 13: Direct Mode (Cooling)

Time

Temperature

Off

Off Setpoint 2

(Offset from

Setpoint) Setpoint 3

(Offset from

Setpoint)

Setpoint 4

(Offset from

Setpoint)

Stage

Interstage

Time

Delay

Interstage

Time

Delay

Interstage

Time

Delay

Differential 2

Differential 3

Differential 4

Differential

Setpoint

Figure 14: Reverse Mode (Heating)

8MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin

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.

Differential is the operational range of Stage 1.

Differential 2 is the operational range of Stage 2.

Setpoint 3 is the offset from the low end of the

deadband that activates Stage 3.

Differential 3 is the operational range of Stage 3.

Setpoint 4 is the offset from the high end of the

deadband that activates Stage 4.

Differential 4 is the operational range of Stage 4.

Interstage Time Delay is the minimum amount of time

between two successive stages when multiple stages

are called for in rapid sequence.

Heating

Setpoint

Stage 1

Stage 2

Stage 4

Stage 3

Differential

Differential 2

Differential 4

Differential 3

Interstage

Time Delay

Time

Setpoint 4

(Offset from Stage 2)

Setpoint 3

(Offset from Stage 1)

Setpoint + (1/2 Setpoint 2)

Setpoint - (1/2 Setpoint 2)

Temperature

Cooling

Interstage

Time Delay

Setpoint 2 (Deadband)

(Centered on Setpoint)

Off

Figure 15: Deadband Mode

MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin 9

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.

Differential is the operational range of Stage 1.

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.

Differential 2 is the operational range of Stage 2.

Setpoint 3 is the offset from Setpoint that activates

Stage 3.

Differential 3 is the operational range of Stage 3.

Setpoint 4 is the offset from Setpoint 2 that activates

Stage 4.

Differential 4 is the operational range of Stage 4.

Interstage Time Delay is the minimum amount of time

between two successive stages when multiple stages

are called for in rapid sequence.

Cooling

Heating

Setpoint

Stage 1

Stage 2

Stage 4

Stage 3

Differential

Differential 2

Differential 4

Differential 3

Interstage

Time Delay

Interstage

Time Delay

Temperature

Time

Setpoint 4

Setpoint 3

Figure 16: Independent Setpoint Mode

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

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.

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.

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.

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