Leviton MZD20-C02 User manual

IRC USER’S GUIDE

This manual applies to the following part numbers:

MODEL

NUMBER

MZD20-102 Dimming Version, Single Room, 120/277VAC 2 2

MZD30-101 Dimming Version, Single Room, 120/277VAC 3 1

MZD20-C02 Dimming Version, Single Room, 347VAC 2 2

MZD30-C01 Dimming Version, Single Room, 347VAC 3 1

Features vary between models. Not all information in this manual applies to all models.

DESCRIPTION

0-10VDC

Zones

Relay

Outputs

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NOTES

DEFAULT FEATURES

The IRC is shipped from the Factory with the following features and functions enabled:

· The system will respond to an Emergency Input signal and turn ON all Zones

· The system will respond to a Force OFF signal and turn OFF all Zones

· The system will function in the MANUAL ON mode

· Auto Cal is off

· Photocell is set to Fast response mode

· Burn In feature is off

· The Switch input is configured as a 4 Button Dimming Entry Station

· Blink Warn is disabled

· The Photocell maximum foot-candles range is set to 70 foot- candles

· The Partial ON target is set to 50%

· The Partial OFF target is set to 50%

· The Partial ON function is enabled

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TABLE OF CONTENTS

STEP 1 PHYSICAL INSTALLATION …………………………………………………………... 3

STEP 2 5

STEP 3 7

STEP 4 13CONFIGURE DIP SWITCH SETTINGS – BLOCK S2 ………………………………

STEP 5 15CONFIGURE DIP SWITCH SETTINGS – BLOCK S3 ………………………………

STEP 6 19ADJUST DIAL SETTINGS ………………………………………………………….……

FEATURES 22BURN-IN ……………………………..………………………………………………...

FEATURES 23AUTO CALIBRATION …………………………………………………………………..

FEATURES 25DAYLIGHT HARVESTING MODES ………………………………….……………...

FEATURES 27PARTIAL ON …………………………………………………….……………………..

FEATURES 28PARTIAL OFF …………………………………………….…………….……………...

DIAGRAMS 31LOW VOLTAGE WIRING DIAGRAMS……………………….……………………..

CONNECT LINE & LOAD VOLTAGE ……………………………………………...

CONNECT LOW VOLTAGE …………………………………………………………...

CHARTS 33CONFIGURATION SETTINGS REFERENCE…………….…………….……………...

35WARRANTY STATEMENT………..…………………………………………………...

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INSTALLATION

MOUNTING FEATURES

The IRC is suitable for plenum use, indoor only, 0 - 40°C, 5 - 95% humidity non-condensing.
The supply circuit and load circuits of the IRC are pre-wired to the control board. Color
coded lead wires are provided for quick connections in a junction box. One
3/4” threaded nipple is provided on the top of the IRC for this purpose.
There are three concentric knockouts provided in the Low Voltage Compartment of the
IRC. They are combination 1/2” and 3/4” knockouts. There is one knockout available on
each of the three sides of the Low Voltage compartment.

ENCLOSURE FEATURES

The enclosure of the IRC is divided into two compartments. The Low Voltage
Compartment is accessible through the cover-plate. The High Voltage Compartment has
no serviceable components and is factory sealed to prevent access.

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INSTALLATION

Threaded Nipple

The fitting on the top of the
IRC attaches directly to a
junction box or enclosure. Two

0.2" mounting holes through
the back of the IRC low
voltage compartment, provide
secure fastening to any flat
surface.

High Voltage Compartment

This area cannot be accessed in
the field. Lead wires exit the
compartment through the top of
the enclosure. There are leads
supplied for field connections to
circuits that energize the IRC and
feed the fluorescent fixture circuits.

Knockouts

There are three concentric
knockouts provided in the
Low Voltage Compartment of
the IRC. They are
combination 1/2” and 3/4”
knockouts. There is one on
each of the three external
sides of the area.

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Low Voltage Compartment

This area contains all of the low
voltage terminations required in the
field. All of the configuration settings
are made in this area as well. Class
2 wiring only.

4

CONNECT LINE & LOAD VOLTAGE

LINE VOLTAGE WIRING – 2 ZONE MODEL

CONTROL POWER CIRCUIT

Voltage Rating: 120/277Vac 20A or

347Vac 15A*

Color: Black – Line, 120 – 277Vac, 18 AWG

or

Orange – Line, 347Vac, 18 AWG

White – Neutral, 18 AWG

Load Rating: 10W

RBBK W

B

V/w

MZD20-102

MZD20-C02*

RELAYS LINE/LOAD

Type: Normally Open, Electrically held.
Ratings: 20A at 120VAC Tungsten/Ballast

20A at 277VAC Ballast
15A at 347VAC Ballast*

Color Relay 1: Blue – Line, 12 AWG

Blue – Load, 12 AWG

Color Relay 2: Red – Line, 12 AWG

Red – Load, 12 AWG

W

B

V

G

W

R

V

G

ZONE 1, 2 COMMON

Load

Zone 1

Load

Zone 2

Wire Color: Gray – 22 AWG

IRC

Alternate 0-10Vdc Control

Loop Route

ZONE 1

Color: Violet

22 AWG

Signal: 0 – 10 VDC

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Color: Violet w/Wh Stripe

Signal: 0 – 10 VDC

ZONE 2

22 AWG

CONNECT LINE & LOAD VOLTAGE

LINE VOLTAGE WIRING – 2 ZONE MODEL

CONTROL POWER CIRCUIT

Voltage Rating: 120/277Vac 20A or

347Vac 15A*

Color: Black – Line, 120 – 277Vac, 18 AWG

or

Orange – Line, 347Vac, 18 AWG

White – Neutral, 18 AWG

Load Rating: 10W

BBBK W

V/w

W/v

MZD30-102

MZD30-C02*

RELAY LINE/LOAD

Type: Normally Open, Electrically held.

Ratings: 20A at 120VAC Tungsten/Ballast

20A at 277VAC Ballast
15A at 347VAC Ballast*

Wire Color: Blue – Line, 12 AWG

Blue – Load, 12 AWG

ZONE 1, 2, 3 COMMON

Wire Color: Gray – 22 AWG

W

B

V

G

W

B

V

G

W

B

V

G

Load

Zone 1

Load

Zone 2

Load

Zone 3

IRC

Alternate 0-10Vdc Control

Loop Route

ZONE 1 ZONE 2

Color: Violet

22 AWG

Signal: 0 – 10 VDC

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Color: Violet w/Wh Stripe

22 AWG

Signal: 0 – 10 VDC

Color: White w/Violet

Signal: 0 – 10 VDC

ZONE 3

22 AWG

6

CONNECT LOW VOLTAGE

TB A.1

OCCUPANCY SENSOR DISABLE / EMERGENCY INPUT

Label: OCC DISABLE / EMERGENCY
Set by DIP Switch: Block 3 No. 1

This is a +24V input signal. Function can be set to either mode exclusively.

Occupancy Sensor Disable Mode

When the input goes high (+24V) the IRC will disable the Occupancy Sensor input and there will be no
change in the current state. When the input signal is removed, the Occupancy Sensor will return to the
normal mode.

Emergency Mode

Emergency mode is triggered when the Emergency input is connected to the common. The common can
be sourced from the unused Occupancy Sensor terminal block. When the signal is received, the IRC will
turn ON all zones by turning ON all relays and raising any 0 – 10Vdc outputs to 10Vdc. The IRC zones will
remain fully illuminated until the Emergency signal is removed.

TB A.2

PHOTOCELL DISABLE / FORCE OFF

Label: PC DISABLE / Force OFF
Set by DIP Switch: Block 3 No. 2

This is a +24V input signal. Function can be set to either mode exclusively.

Photocell Disable Mode

When the input goes high (+24V) the IRC will disable the Photocell input and there will be no change in the
current level. When the input signal is removed, the Photocell input will return to the normal mode.

Force OFF Mode

The outputs of the IRC are Forced OFF when the Force OFF input is connected to +24Vdc. When the signal
is received, the IRC will turn OFF all zones by opening all relays and lowering any 0 – 10Vdc outputs to 0
Vdc. The system will not respond to Entry Station button presses or Occupancy Sensor signals. The IRC
zones will remain OFF until the Force OFF signal is removed.

TB A.3

CLOCK INPUT – SWEEP OR PARTIAL OFF MODIFIER

Label: CLOCK

This signal would originate from a timing system and is a +24V input signal. If Partial Off is
active and the input goes high (+24V), the IRC will allow the Occupancy Sensor to turn OFF the
zones .
When the signal is removed, the Occupancy Sensor will only reduce the light level to the preset
minimal light level determined by Partial OFF functionality. If Partial OFF functionality is not
active, the Clock signal will act as a Sweep and turn the lights OFF.

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CONNECT LOW VOLTAGE

TB A.4

LOAD SHED - DEMAND RESPONSE

Label: SHED

This signal would originate from an energy management system and is a +24V input signal.
When the input goes high (+24V) the IRC will reduce the output load levels based upon the
position of the Shed trim pot dial.
In the event that you are in daylighting mode and less artificial light is required to meet the
target than is required by load shed, the lights will remain at the lower lighting level – meeting
the target.

TB A.5, A.6, A.7

OCCUPANCY SENSOR INPUT

Label: OCC

This three position terminal block is dedicated to the connection of the Occupancy Sensor. The
Occupancy Sensor signal wire connects to the OCC Sensor Signal terminal. Power for the
Occupancy Sensor is provided from the +24Vdc and Common terminals.

TB A.8, A.9, A.10

PHOTOCELL INPUT

Label: PC

This three position terminal block is dedicated to the connection of the Photocell. The
Photocell signal wire connects to the Photocell Signal terminal. Power for the Occupancy
Sensor is provided from the +24Vdc and Common terminals.

A

1 2 3 4 5 6 7 8ON9 10

G

GGGR A

Terminal Block A

1

10

2

10

3

10

4

10

R R

1 2 3 4 5 6 7 81 2 3 4 5 6 7 8

ONON

128

64

32

16

8

4

2

1 2 3 4 5 6 7 8

1

ON

G G

G

Z2 Z3

Z1

10 10 10

G

CONNECTIONS AND ADJUSTMENTS

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CONNECT LOW VOLTAGE

ZONE 1, 0-10VDC TB B.1, B.2

Label: GRAY – COMMON

Violet – positive conductor

These terminals provide an alternate location for connecting to the dimming ballast or LED
driver control circuit. The dimming circuit provides the analog output to control up to 20

dimming ballasts.

ZONE 2, 0-10VDC TB B.3, B.4

Label: GRAY – COMMON

Violet – positive conductor

These terminals provide an alternate location for connecting to the dimming ballast or LED
driver control circuit. The dimming circuit provides the analog output to control up to 20

dimming ballasts.

ZONE 3, 0-10VDC (IF APPLICABLE)TB B.5, B.6

Label: GRAY – COMMON

Violet – positive conductor

These terminals provide an alternate location for connecting to the dimming ballast or LED
driver control circuit. The dimming circuit provides the analog output to control up to 20

dimming ballasts.

A

1 2 3 4 5 6 7 8ON9 10

G

GGGR A

CONNECTIONS AND ADJUSTMENTS

9

1

10

2

10

3

10

4

10

R R

1 2 3 4 5 6 7 81 2 3 4 5 6 7 8

ONON

128

64

32

16

8

4

2

1 2 3 4 5 6 7 8

1

ON

G G

G

Z2 Z3

Z1

10 10 10

G

Terminal Block B

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CONNECT LOW VOLTAGE

TB B – 7,8,9,10
TB B – 11,12,13,14

LOW VOLTAGE SWITCH INPUT(S)

Label: Switch 1 Switch 2 (if equipped)

TB B - 7 ON - ON Button Input TB B - 11 ON - ON Button Input
TB B - 8 OFF - OFF Button Input TB B - 12 OFF - OFF Button Input
TB B - 9 +24V - +24Vdc Power TB B - 13 +24V - +24Vdc Power
TB B - 10 Pilot - Pilot LED on Switch TB B - 14 Pilot - Pilot LED on Switch

Switch Types

Set by DIP Switch: Block 2 Number 3
There are two general types of switch inputs; analog and switched.

Analog

In analog mode, the input is expecting to see a 0 - 24Vdc or a 0 - 10Vdc signal which
is used to dim the light levels proportionately to the level of the analog input.

Switched

In the switched mode, the input is expecting to see a +24Vdc level to indicate that a
switch is closed.

Switch Button Action

Set by DIP Switch: Block 2 Number 2

Momentary

The switch connected to these terminal blocks uses a pulse signal to communicate a
manual change in state request.

Maintained

The switch connected to these terminal blocks holds a signal to communicate the
desired state.

Button Quantity

Set by DIP Switch: Block 2 Number 1

One Button Mode

The switch connected to these terminal blocks uses the same button to turn on and
turn off the lights. Push the button once to turn on, push the button a second time to
turn off. The button signal wire should be connected to the On terminal. No wire is
required at the Off terminal.

Two Button Mode

The switch connected to these terminal blocks uses two different buttons to turn on
and turn off the lights. Push one button to turn on, push a different button to turn
off. The signal wires from each of the buttons should be connected to their
associated terminals.

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CONNECT LOW VOLTAGE

TB B – 7,8,9,10
TB B – 11,12,13,14

LOW VOLTAGE SWITCH INPUT(S) CONTINUED

Label: Switch 1 Switch 2 (if equipped)

TB B- 7 ON - ON Button Input TB B - 11 ON - ON Button Input
TB B - 8 OFF - OFF Button Input TB B - 12 OFF - OFF Button Input
TB B - 9 +24V - +24Vdc Power TB B - 13 +24V - +24Vdc Power
TB B - 10 Pilot - Pilot LED on Switch TB B- 14 Pilot - Pilot LED on Switch

Supply

The +24V source terminal supplies the power required to energize the Low Voltage switch
circuit. This source is shared with all circuits supplied from the +24V power supply to a
maximum of 120 mA.

Switch Connections

For a complete description of switch behaviors refer to the Settings section. Wiring of the Low
Voltage switch must match the manufacturer recommendations.

Pilot

This is the Pilot light output. To illuminate the button on the Low Voltage switch, connect the
appropriate wire from the switch to the Pilot terminal. If the button does not require
illumination no wire will be present. The Pilot output connects to common to turn on the pilot
light in your control device.

Wiring Diagrams

TB B-6

TB B-7

TB B-8

TB B-9

ON

OFF

+24V

PILOT

Signal

Signal

+24V

LED

COM

To Four Button
OR Two Button

Low Voltage

Switches

TB A-7 or 10

TB B-6

TB B-7

TB B-8

TB B-9

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COM

ON

OFF

+24V

PILOT

Signal

To One Button

+24V

LED

Low Voltage

Switch

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CONNECT LOW VOLTAGE

TB C – 1,2,3

EMERGENCY / HVAC RELAY

Label: RLY COM – COMMON

RLY NC – Normally Closed
RLY NO – Normally Open Contacts

There is one Low Voltage relay output rated for 1A @ 24V which can be switched
between HVAC and Emergency output functionality. This terminal block is connected to
the Emergency Output / HVAC relay.

Jumper Settings

A three (3) position pin header is located adjacent to the terminal block. The jumper
configuration of this header determines the functionality of the relay.

HVAC

A jumper between pins 1 and 2 will result in HVAC functionality. In this mode the relay
will change state when the room is occupied. In occupied state NO (normally open)
contact is closed.

Emergency

A jumper between pin 2 and 3 will result in Emergency output functionality. In this mode
the relay will change state when an Emergency Input signal is detected. In normal,
non-emergency state the NO (normally open) contact is closed.

EMERG/HVAC

RELAY TB C

A

1 2 3 4 5 6 7 8ON9 10

G

GGGR A

1

2

3

4

CONNECTIONS

R R

10

10

10

10

1 2 3 4 5 6 7 8

ON

ONON

128

G

64

32

16

Z1

8

4

2

1

1 2 3 4 5 6 7 81 2 3 4 5 6 7 8

G G

Z2 Z3

10 10 10

G

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CONFIGURE DIP SWITCH SETTINGS

EMERGENCY / OCCUPANCY SENSOR DISABLE

DIP SWITCH BANK S2

DIP Switch: Block 2 Switch 1
Label: Emerg / Occ Disable

This configures the response to a signal (common) at the
OCC Disable/Emergency input terminal. If the switch is in
the off position (EMERG), the response to a signal will be to
turn all relays on and raise all 0 – 10V outputs to ten volts.
During this condition no other control will have any effect
over the outputs. If this switch is set to on (OCC DISABLE),
the Occupancy Sensor input will be disabled and no change
in the current zone state will occur when +24Vdc is received
by the input. When the signal is removed, the IRC will
return to normal operation.

FORCE OFF / PHOTOCELL DISABLE

Occ Sensor Disable

Photocell Disable

Not Used

Auto ON

1 2 3 4 5 6 7 8

ON

Not Used

Force OFF

Emergency

Manual ON

Auto Calibration

Photocell Fast

Local

Photocell Slow

DIP Switch: Block 2 Switch 2
Label: ForceOFF / PC Disable

This configures the response to a signal (+24V) at the Force OFF/Photocell Disable input
terminal (TB1-2). If the switch is in the off position (Force OFF), the response to a signal
will be to turn all relays OFF and lower all 0 – 10V outputs to zero volts. During this
condition no other control will have any effect over the outputs. If this switch is set to ON
(Photocell DISABLE), the photocell will be disabled. When the signal is removed, the IRC
will return to normal operation.

NOT USED

DIP Switch: Block 2 Switch 3
Label: Local / Net Enabled

Burn In

Closed Loop

OFF

Open Loop

MANUAL ON / AUTO ON

DIP Switch: Block 2 Switch 4
Label: Man ON / Auto ON

This switch determines the method for turning zones ON in a dark room. In the OFF
position (MANUAL ON) the IRC will turn on all zones only with an Entry Station button
press. In this state the Occupancy Sensor will turn all of the zones OFF.
In the ON position (AUTO ON), the IRC will turn ON and OFF zones in response to signals
from the Occupancy Sensor. Occupancy will turn ON all zones and vacancy will turn OFF
all the zones. Entry Station button press will also change the state of the lighting zones.

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CONFIGURE DIP SWITCH SETTINGS

LOCAL / AUTO CALBRATION

DIP Switch: Block 2 Switch 5
Label: Local / Auto Cal

The setting activates the Auto Calibration cycle that sets the target level for the photocell
and Daylight Harvesting functions. For more information, see the discussion on the Auto
Calibration feature later in this guide.

PHOTOCELL SLOW RESPONSE / PHOTOCELL FAST RESPONSE

DIP Switch: Block 2 Switch 6
Label: PC Slow / PC Fast

This setting determines the speed at which the system will respond to changes in light
levels detected by the Photocell. In the off position (PC Slow), the response time will be 30
minutes. In the on position (PC Fast), the response time will be 30 seconds.

BURN IN OFF / BURN IN ACTIVATE

DIP Switch: Block 2 Switch 7
Label: Off / Burn In

This setting activates the 100 Hour Burn In feature when in the ON position. It is necessary
for fluorescent lamps to be conditioned prior to continuous service. This will ensure
smooth dimming from the light fixture. This is not required for LED fixtures.

OPEN LOOP / CLOSED LOOP

DIP Switch: Block 2 Switch 8
Label: Open Loop / Closed Loop

The switch determines whether the IRC should operate in open loop or closed loop
daylight harvesting mode. In closed loop mode, the photocell should be sensing the
amount of ambient or task light in the room. In open loop mode, the photocell should be
sensing the amount of light coming in through the skylight or windows. For details on the
two methods of operation, please see the discussion later in this guide.

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CONFIGURE DIP SWITCH SETTINGS

DIP SWITCH BANK S3

2 BTN/ON Only

Maintained/10V

Analog

2 BTN/ON Only

1 2 3 4 5 6 7 8

ON

Maintained/10V

Analog

Blink Warn

1 Btn

1 Btn

Switch

Momentary

S1 S2

Switch

Momentary

1 BUTTON ENTRY STATION CONFIGURATION

( RLVSW-1LX )

DIP Switch: Block 3 Switch 1, 2, 3 or 4, 5, 6

Activating the ON signal input with a +24Vdc level shall cause
the associated room to fade the lights to the daylighting
target level over three (3) seconds. If daylighting is not active
in the space, this function will fade the lights to the level of
the maximum trim pot. If the zone is already ON, then the
lights will fade to OFF over one (1) second.

Units that have Non- Partial Level dimming activated shall
dim the room on and off. Pressing the button shall fade the
room ON in three (3) seconds. Pressing the button again shall
fade the room down to OFF in one (1) second. If the button is
held, dimming shall continue until either FULL ON or OFF is
established or the button is released. When holding the
button, both up and down fade shall be three (3) seconds.

If the zone is OFF, tapping the button shall turn it ON. If
Partial Level is active and the zones are OFF, the first press
will turn ON zones to the Partial On Target level. The second
press will take the zones to full or the maximum level. A third
press will fade the zones to OFF.

2 BTN/ON Only

Maintained/10V

Analog

1 2 3 4 5 6

ON

1 Btn

Switch

Momentary

S1 S2

Off Off Off Off Off Off

2 BTN/ON Only

Maintained/10V

Analog

1 Btn

Switch

Momentary

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2 BUTTON ENTRY STATION CONFIGURATION

( RLVSW-2LX )

DIP Switch: Block 3 Switch 1, 2, 3 or 4, 5, 6

Activating the ON signal input with a +24VDC level shall
cause the associated room to fade the lights to the
daylighting target level over three (3) seconds. If daylighting
is not active in the space, this function will fade the lights to
the level of the maximum trim pot. If the zone is already ON,
then the lights will fade to OFF over one (1) second.

Units that have Non- Partial Level dimming activated shall
dim the room on and off. Pressing the button shall fade the
room to ON in three (3) seconds. Pressing the button again
shall fade the room down to OFF in one (1) second. If the
button is held, dimming shall continue until either FULL ON
or OFF is established or the button is released. When holding
the button, both up and down fade shall be three seconds.

If the zone is OFF, pressing the ON button shall turn the zone
ON. If Partial Level is active and the zones are OFF, the first
press will turn ON zones to the Partial On Target level. The
second press will take the zones to full or the maximum
level. A press of the OFF button will turn the zones OFF.

CONFIGURE DIP SWITCH SETTINGS

2 BTN/ON Only

Maintained/10V

Analog

2 BTN/ON Only

Maintained/10V

1 2 3 4 5 6

ON

1 Btn

S1 S2

On Off Off On Off Off

1 Btn

Switch

Momentary

Momentary

Analog

Switch

4 BUTTON ENTRY STATION CONFIGURATION

( RLVSW-4LX )

2 BTN/ON Only

Maintained/10V

Analog

2 BTN/ON Only

DIP Switch: Block 3 Switch 1, 2, 3 or 4, 5, 6

1 2 3 4 5 6

Activating the ON signal input with a +24Vdc level shall cause
the associated room to fade the lights to the daylighting
target level over three (3) seconds. If daylighting is not active
in the space, this function will fade the lights to the level of
the maximum trim pot. If the zone is already ON, then the
lights will fade to OFF over one (1) second.

Units that have Non- Partial Level dimming activated shall dim
the room on and off. Pressing the ON button shall fade the room
to ON in three (3) seconds. Pressing the OFF button shall fade the
room down to OFF in one (1) second. If the button is held, dimming shall continue until
either FULL ON or OFF is established or the button is released. When holding the button,
both up and down fade shall be three (3)seconds. Pressing the Bright ( ) button will
temporarily increase the light level above the Daylight Harvesting target level. Pressing
the Dim ( ) button will temporarily decrease the light level below the Daylight
Harvesting target level. If the zone is OFF, pressing the ON button shall turn the zone ON.
If Partial Level is active and the zones are OFF, the first press will turn ON zones to the
Partial On Target level. The second press will take the zones to full or the
maximum level. A press of the OFF button will turn the zones OFF.

ON

1 Btn

Momentary

S1 S2

On Off Off On Off Off

Maintained/10V

1 Btn

Switch

Momentary

16

Analog

Switch

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CONFIGURE DIP SWITCH SETTINGS

BLINK WARN OVERRIDE TIME

DIP Switch: Block 3 Switch 7

Block 3 Switch 8

Label: Blink Warn

This setting determines the length of time the zones will remain on
once the blink warn feature is activated and a request for the
override has been received. This request can be made by pressing the
On button at the low voltage switch. Pilot output will flash on and off
to indicate blink warn is active. Overriding blink warn by tapping the
On button will stop the flashing.

If no button is pressed after the Blink, the zones will turn OFF in 5
minutes.

Blink Warn

7 8

ON

OFF + OFF = OFF
OFF + ON = 30 min
ON + OFF = 1 hr.
ON + ON = 2 hrs.

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Intentionally left blank

CONFIGURE DIP SWITCH SETTINGS

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ADJUSTMENTS - DIALS

1 MAXIMUM TRIM LEVEL DIAL

TASK TUNING

Adjust this trim pot to set the upper limit for the 0 – 10VDC Ballast outputs. The full
range of the pot adjusts the upper limit in a range from 6 volts to 10 volts.

Default

The default position is full on (counterclockwise).

MINIMUM TRIM LEVEL DIAL2

TASK TUNING

Adjust this trim pot to set the minimum level the 0 – 10Vdc outputs will dim to during
daylight harvesting mode operation. The full range of the pot adjusts the lower limit in
a range from 0 volts to 4 volts.

Default

The default position is full off (clockwise).

LOAD SHED DIAL – DEMAND RESPONSE3

Adjust this trim pot to determine the action taken when the DEMAND RESPONSE (SHED) input is
active.

Application

All 0 – 10Vdc outputs will go to the level determined by the position of the Load Shed pot if the
output level of the zone is currently higher than that Shed level setting. If the Load Shed pot is
adjusted above the Max pot, no change shall occur.

19

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ADJUSTMENTS - DIALS

DAYLIGHT HARVESTING TARGET LEVEL OR LLF DIAL4

Open Loop

In this mode, the Offset dial is used to enter the desired footcandle value from 0 – 100
footcandles as measured at the photocell. A dial setting of zero (0) equals zero (0) foot­candles, a dial setting of 10 equals 100 foot-candles.

Closed Loop

In this mode, the Offset Dial is used to set the photocell target value. The dial scale of 0-10
represents a proportional 0-10 volt signal from the photocell. However, if you are using
AutoCal (DIP switch S2.5 is in the ON position), the Offset dial defines the Light Loss Factor
(LLF) applied to the target level. The LLF is 20% when the dial is set to the zero (0) position and
0% when the dial is in the 10 position. The assumption is that the AutoCal occurs when lamps
are new, the fixtures are clean, and the room is performing to the initial lumen output not the
maintained lumen output.

Z1, Z2, Z3

DAYLIGHT HARVESTING TARGET LEVEL OFFSET DIAL

These dials are used to determine the amount of daylight control that is applied to each zone.
The full range of rotation represents 5-100% of the photocell’s footcandle range. The
procedure for adjusting these dials is different depending upon whether the IRC has been
configured for Closed Loop or Open Loop control.
Open Loop: if daylight harvesting is not desired, turning the dials to full (clockwise) shall
disable the dimming function for the corresponding zone. When at full range, the lights of the
zone will stay On at the Max output level.

Closed Loop: a zone can be excluded from Daylight Harvesting by setting the dial to <5%.

Default

The default position is full on (clockwise).

A

1 2 3 4 5 6 7 8ON9 10

G

GGGR A

1

10

2

10

3

10

4

10

R R

1 2 3 4 5 6 7 81 2 3 4 5 6 7 8

ONON

128

64

32

16

8

4

2

1 2 3 4 5 6 7 8

1

ON

G G

G

Z2 Z3

Z1

10 10 10

G

ADJUSTMENTS DIALS

20

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ADJUSTMENT - DIALS

Performance Curve – Task Tuning

Illustrating Maximum and Minimum Trim Pot Ranges

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

Artificial Full

POT 1 - Maximum Trim Pot Range

1

10

Operating Range

2

Artificial

POT 2 - Minimum Trim Pot Range

0%

Zero

10

Time

Level

Design Light

Percentage of

See previous page for details

21

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FEATURE: BURN IN

BURN-IN FEATURE

Set by DIP Switch: Block 3 Number 7 – ON position

The Burn IN feature of the IRC provides an automatic initializing cycle for new
fluorescent lamps. The Burn In feature will maintain the fluorescent fixtures at full
illumination levels for 100 hours. At the conclusion of the Burn IN cycle the IRC will
exit the Burn IN routine and enter normal operation.

When to use it

Some manufacturers of fluorescent lamps require the lamp to be run at the full
illumination level for a ‘burn in’ period prior to any dimming activity. This feature
provides an easy method to satisfy that requirement.

Start

To initialize this function, move the DIP switch labeled Burn In to the ‘ON’ position.
Observe: The LED above the DIP switch will glow red and will remain in that state
until the cycle is complete. The fluorescent fixtures will also be illuminated at their
full level when turned ON until all Zones have been on for 100 hours.

Stop

The cycle can be stopped at any time by turning off the DIP switch.
Observe: The red LED above the DIP switch will turn off. When cycle is complete,
the LED will turn off even with the DIP switch in the On position.

Restart

To restart this function, move the DIP switch labeled Burn In to the ‘ON’ position.
Observe: The observations will be the same as the Start step.

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FEATURE: AUTO CALIBRATION

AUTO CALIBRATION (AUTO CAL)

(Closed Loop Operation Only)

Set by DIP Switch: Block 3 Number 5 – ON position

The Auto Calibration feature of the IRC Power Pack provides an automatic
daylight harvesting calibration. During the 24 hour calibration period all fluorescent
fixtures will remain at full illumination levels and cannot be turned off. The IRC will
monitor the Photocell readings to determine the lowest level during the calibration
period. This reading typically occurs at night. At the conclusion of the Auto
Calibration period the IRC will enter normal operation.

Note: Auto Calibration is only applicable to closed loop photocell operation. When
the device is configured in open loop mode, auto calibration can be activated but
the results of such will have no effect on the configuration or output of the IRC.

Start

To initialize this function, move the DIP switch labeled Auto Cal to the ‘ON’ position.
Observe: The LED above the DIP switch will begin to flash on and off in a steady
pattern until the calibration period is complete. The fluorescent fixtures will also be
illuminated at their full level for the duration of the cycle.

Stop

The cycle can be stopped at any time by turning off the DIP switch.
Observe: The red LED above the DIP switch will turn off.

Restart

To restart this function, move the DIP switch labeled Auto Cal to the ‘OFF’ position
and then back to the ‘ON’ position.

End of Cycle

Observe: The LED will be on steady at the end of the calibration period and the
IRC will automatically enter normal operation.

23

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Performance Curve

Illustrating AutoCal Feature

FEATURE: AUTO CALIBRATION

Photocell

90%

Natural

Light

80%

70%

60%

50%

40%

30%

20%

Percentage of Design Light Level

10%

0%

0 24 Hr

Measured
Light Level

Artificial Light

Designed
Light Level

12 Hr

Light Level

Natural + Artificial

Natural

Light

AutoCal
Value

24

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FEATURE: DAYLIGHT HARVESTING

DAYLIGHT HARVESTING MODES

Open-Loop Operation

Typical open-loop systems employ a photocell positioned towards the daylight source
(window, skylight, etc).
Important! For best results, the photocell should receive as little electric light as
possible.
To determine the setting of each of the PC Level trim pots, light meter readings must
be taken during the day with the electric lights off and during consistent daylight (i.e. if
a cloud covers the sun during meter recording, start over or wait for the cloud to pass).
Position the light meter at the photocell, pointing it in the same direction as the
photocell. Record the value. Next position the light meter at the work surface in each
room pointing it towards the ceiling. Record the value in each room.
Now calculate the ratio of the zone value to the photocell value for each room. Use the
chart below to determine the PC Level setting. For example, if the photocell reading is
400 foot candles and zone 1’s reading is 50 foot candles, the ratio is 50/400 = 0.125.
Find 0.125 on the chart’s x-axis (Room/Photocell Ratio) and follow a straight line up
until it intersects the diagonal. Then from that point, follow a straight line horizontally to
the left on the chart to obtain the trim pot setting noted on the y-axis. In this case the
setting would be 7.

Closed-Loop Operation

Closed-loop systems position the photocell so that it measures the amount
of light in the room being controlled. It is important to correctly position the
photocell so that it receives either the average amount of ambient light or if
sensing task lighting that it is directed at a surface which will reflect an appropriate
representation of the amount of task lighting in the room.

25

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FEATURE: DAYLIGHT HARVESTING

DAYLIGHT HARVESTING BASICS

150%

140%

130%

120%

Artificial Light

OFF

Maximum

Reduction

Natural

Light

Power

Natural

Light

Design Illuminance

Target Level

ON

Artificial Light

Artificial

Light

110%

100%

90%

80%

70%

60%

50%

40%

30%

Percentage of Design Light Level

20%

10%

0%

Artificial

Light

Full Power

Increasing

Savings

Power

Reduction

Time

Blend of Light Sources

Artificial and Natural Light

26

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FEATURE: PARTIAL ON

Entry

Station

BP

ON

90%

80%

70%

60%

50%

40%

Percentage of Design Light Level

30%

20%

Performance Curve

Illustrating Partial ON Feature

Entry

Station

BP

ON

OCC

Sensor

Vac

OFF

OCC

Sensor

Occ

ON

Entry

Station

BP

ON

OCC

Sensor

Vac

OFF

BP = button press
Occ = occupancy
Vac = vacancy

Daylight
Harvesting
Target

Partial ON
Level

10%

0%

0

Partial ON – Manual On

Partial ON – Auto On

Time

PARTIAL ON – MANUAL ON

Set by DIP Switch: Block 2 No. 4 Switch: Block 1 No. 9, 10

Set to: Manual ON Set to: Partial ON

When activated, this provides Title 24 2013 functionality for Manual ON to a preset level
other than 100% full ON. When entering a dark room, the zones will be illuminated to a
preset (50% shown) with a button press of the ON button of the Entry Station. A second
press of the same button will cause the zones to go to the Daylight Harvesting target level.
The Occupancy Sensor or the Switch will turn OFF the zones.

PARTIAL ON - AUTO ON

Set by DIP Switch: Block 2 No. 4 Switch: Block 1 No. 9, 10

Set to: Auto ON Set to: Partial ON

When activated, this provides functionality for Auto ON to a preset level other than 100%
full ON. When entering a dark room, the zones will be illuminated to a preset (50% shown)
with detection by the Occupancy Sensor. A second press of the ON button will cause the
zones to go to the Daylight Harvesting target level. The Occupancy Sensor or the switch
will turn OFF the zones.

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100%

90%

80%

70%

Performance Curve

Illustrating Partial OFF Feature

OCC

Sensor

Occ

ON

OCC

Sensor

Vac

OFF

Clock

Signal

ON

OCC

Sensor

Occ

ON

FEATURES: PARTIAL OFF

OCC

Sensor

Vac

OFF

BP = button press
Occ = occupancy
Vac = vacancy

Maximum
Power
Level

60%

50%

40%

50% Reduction in Power

Reduced
Power
Level

Percentage of Design Light Level

30%

20%

10%

Partial OFF

0%

0

Modified

with Clock

Signal

Time

PARTIAL OFF

Set by DIP Switch: Block 2 No. 4 Switch: Block 1 No. 9, 10

Set to: Auto ON Set to: Partial OFF

When activated, this provides Title 24 2013 functionality for maintaining a minimum zone
output. The function will initiate with a power cycle. The zones will be illuminated to a
predetermined minimum level (50% shown). When occupancy is detected, the Occupancy
sensor will set the zones to Full ON or the setting of the Maximum Trim Pot. Upon
vacancy, the zones will return to the predetermined minimum level and remain there.

PARTIAL OFF + CLOCK SIGNAL

The predetermined minimum level will be ignored if a signal is received and held at the
Clock Input (TB1-3). This will allow the Occupancy Sensor to turn the zones completely OFF
when vacancy is detected. The Occupancy Sensor will turn ON the zones when occupancy
is detected.

28

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LOW VOLTAGE WIRING DIAGRAMS

LOW VOLTAGE DEVICES

PILOT

+24V

OFF

ON

PILOT

+24V

OFF

ON

Violet

Gray

Violet

Gray

Violet

Gray

COM

+24Vdc

Photocell

COM

+24Vdc

Occ Sensor

Load Shed

Clock/Sweep

Force OFF/PC Disable

Emerg/OCC Sensor

TB B.14

TB B.13

TB B.12

TB B.11

TB B.10

TB B.9

TB B.8

TB B.7

TB B.6

TB B.5

TB B.4

TB B.3

TB B.2

TB B.1

TB A.10

TB A.9

TB A.8

TB A.7

TB A.6

TB A.5

TB A.4

TB A.3

TB A.2

TB A.1

Pilot

+24

OFF

Pilot

+24

OFF

COM

ON

ON

COM

Low Voltage Switch 2

Only on MZD20

COM

COM

ON

OFF

+24

Pilot

COM

ON

OFF

+24

Pilot

COM

ON

OFF

+24V

PILOT

COM

ON

OFF

+24V

PILOT

COM

Low Voltage

Switch 1

All connections are for
copper wire only.

BK

R

BK

R

COM

+24Vdc

BK

R

OO

BK

R

BLBL

BK

PC

R

O

BK

OS

R

BL

Contacts by

Others

WIRING DIAGRAM 1

31

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LOW VOLTAGE WIRING DIAGRAMS

PLUG LOAD CONTROL WITH OPP20

When the occupancy sensor detects occupants in the space, the HVAC relay will change
state. In this case the Normally Open contacts are used thus enabling power at the
receptacle.
When the occupancy sensor no longer detects occupants, the HVAC relay contacts will
open to cause the Power Pack to disable power at the receptacle.

H Line N

W

BK

BL

BL

NC

NO

Com

Power Pack

OPP20

Y/O

R

HVAC Relay

WIRING DIAGRAM 2

To Plug Load

OMNISTAT REMOTE SETBACK SWITCH

When the occupancy sensor detects occupants in the space, the HVAC relay will change
state. In this case the Normally Closed contacts are used, this allows normal operation of
the thermostat. When the occupancy sensor no longer detects occupants, the HVAC relay
contacts will close to enable the thermostat set back level.
This requires a +5-15VDC power supply.

Leviton

Com

+15VDC

Omnistat

Power

Supply

NC

NO

Com

HVAC Relay

GRN

BK

WIRING DIAGRAM 3

32

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CONFIGURATION SETTINGS

Switch

Number

1

2

3

4

5

6

7

8

Value

When Set to ON

10% ON*

10% ON*

10% ON*

10% ON*

10% ON*

10% OFF*

Spare OFF*

Spare OFF*

Default

Position

This is the Partial ON or OFF target

value associated with the Occupancy

Any switch in the ON position adds a

Sensor

Value Shown

10 + 10 + 10 + 10 +10 = 50%

value of 10% to the total

DIP Switch Bank S1

9

Occupancy Sensor Behavior

10

10

OFF

OFF

9

ON*

OFF*

9

OFF

10

No Partial ON or

Partial OFF control

ON

Partial ON

Is Active

Partial OFF

Is Active

or Disables These Functions

DIP Switch Combinations Enables

33

Switch

Number

1

2

3

4

DIP Switch Bank S4

5

Photocell Maximum FC

6

7

8

Value

When Set to ON

1 ON*

2 ON*

4 ON*

8 OFF*

16 OFF

32

64

128

OFF*

OFF*

OFF*

OFF*

Default

Position

Value Shown
1 + 2 + 4 = 7

7 x 10FC = 70FC

The photocell is

configured for

maximum range

of 70FC

*denotes Factory Default settings

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CONFIGURATION SETTINGS

DIP Switch Bank S2

Switch

Number

1

2

3

4

5

6

7

8

Switch

Number

1

2

3

4

Function

OFF Position ON Position

Emergency* Occ Sensor Disable

Force OFF* Photocell Disable

Not Used* Not Used

Manual ON* Auto ON

Burn In Local* Auto Calibration

Photocell Slow Photocell Fast*

Burn In OFF* Burn In Activate

Open Loop Closed Loop*

Function

OFF Position ON Position

Switch 1 – 1 Button

Switch 1 – Momentary

Switch 1 – Switch Button*

Switch 2 – 1 Button

Switch 1 – 2 Button ON Only*

Switch 1 – Maintained

Switch 1 – Analog*

Switch 2 – 2 Button ON Only

5

6

7

DIP Switch Bank S3

8

7

8

7

8

Switch 2 – Momentary

Switch 2 – Switch Button

OFF*

Blink-Warn OFF

OFF*

OFF

Blink-Warn Delay

ON

ON

Blink-Warn Delay

ON

30 minutes

2 Hours

Switch 2 - Maintained

Not Used On

3 Zone Model

Switch 2 – Analog

DIP Switch Combinations
Enables or Disables the Blink­Warn Function

*denotes Factory Default settings

34

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Leviton LES Division of Leviton Manufacturing Co. Inc warrants its Dimmer Systems and Controls

Limited 2 Year Warranty

to be free of material and workmanship defects for a period of two years after system
acceptance or 26 months after shipment, whichever comes first. This Warranty is limited to
repair or replacement of defective returned Freight pre-paid to Leviton LES Division. User
shall call and request a return authorization number to mark on the outside of the
returning carton, to assure that the returned material will be properly received at Leviton.
All equipment shipped back to Leviton must be carefully and properly packed to avoid
shipping damage. Replacements or repaired equipment will be returned to sender freight
prepaid, F.O.B. factory. Leviton is not responsible for removing or replacing equipment on the
job site, and will not honor charges for such work. Leviton will not be responsible for any loss
of use time or subsequent damages should any of the equipment fail during the warranty
period, but agrees only to repair or replace defective equipment returned to its plant in
Tualatin, Oregon. This Warranty is void on any product that has been improperly installed,
overloaded, short circuited, abused, or altered in any manner. Neither the Seller nor Leviton
shall be liable for any injury, loss or damage, direct or consequential, arising out of the
use of or inability to use the equipment. This Warranty does not cover lamps, ballasts, and
other equipment which is supplied or warranted directly to the user by their manufacturer.
Leviton makes no warranty as to the Fitness to Purpose or other implied Warranties.

WARNING: TO AVOID FIRE, SHOCK, OR DEATH, TURN OFF POWER AT CIRCUIT BREAKER OR FUSE
AND TEST THAT POWER IS OFF BEFORE SERVICING OR WIRING!

WARNING: TO BE INSTALLED AND/OR USED IN ACCORDANCE WITH APPROPRIATE ELECTRICAL
CODES AND REGULATIONS.

CAUTION: IF YOU ARE UNSURE ABOUT ANY OF THESE INSTRUCTIONS, CONSULT AN ELECTRICIAN.

CAUTION: USE THIS DEVICE ONLY WITH COPPER OR COPPER CLAD WIRE.

35

DI-000-IRCDM-00A

Revision A

9/2014

KP V5.18

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