modular room control (mrc) series digital thermostat product … · conditioning (hvac) equipment...

Product Bulletin MRCIssue Date July 19, 2002

© 2002 Johnson Controls, Inc. 1Code No. LIT-1201430 www.johnsoncontrols.com

Modular Room Control (MRC) SeriesDigital Thermostat

The MRC Digital Thermostat is an expandable,multi-purpose, high-quality Direct Digital Control (DDC)illuminated thermostat designed to control virtually anyFan Coil Unit (FCU) or Packaged Terminal AirConditioner (PTAC) found in hotel guestrooms. TheMRC comes standard with five relays, and can beequipped with an on-board Infrared (IR) transceiverand Passive Infrared (PIR) motion detector. Coupledwith a magnetic door switch (wired or wireless), theMRC becomes the brain of a highly effective EnergyManagement System (EMS) for guestrooms.

When connected to a Central Interface Network(CINET) with a pair of low voltage wires, a centrallycontrolled EMS package is created. The MRC isreadily expandable to include functionality such ashumidity control, outside temperature display, mini-baraccess reporting, occupancy reporting to housekeeping,automatic control of lights, and much more. Use ofinfrared or low voltage wiring enables remote control oflights, occupancy reporting, and other functions.

Figure 1: MRC Digital Thermostat

Features and Benefits

❑ Centrally Controlled, withMultiple ServicesIntegrated on a CommonPlatform

Provides fully automated guestroom control and acommunication system for the lodging industry, with the abilityto tie together the guestrooms and other systems within thehotel, including the Property Management and BuildingAutomation System.

❑ Passive Infrared (PIR) andEntry Door AccessDetection Combined

Provides reliable and automatic energy management byactivating programmable temperature setbacks when the guestroom is unoccupied.

❑ Lighting Controls that areExceptionally Versatileand Designed Specificallyfor Hotel Guestrooms

Allows the guests to control their lighting environment remotely.In addition, the lighting controls can be programmed to turn onone or more selected lights when guests first enter the room,after check-in, creating a warm, welcoming guestroomambiance.

❑ Infrared (IR) Technology Provides areas with high labor costs, or restrictive electricalcodes, practically wireless installation with this unique IRcapability.

❑ “Do-Not-Disturb/Make-Up-Room” and DoorChime System

Adds to the guests’ amenities and eliminates the use ofold-fashioned, outdated hanging cards and the need for staff toknock or yell through the door to guests. Guests caneffortlessly interact with hotel staff and services.

❑ Central Electronic LockSystem (CELS)

Provides hotel operational efficiency and greater guest securitywhen the door locks are controlled via this wireless, real-time,on-line lock control system.

2 Modular Room Control (MRC) Series Digital Thermostat Product Bulletin

Product Overview

The MRC as a Basic Direct Digital Control (DDC)Thermostat

In its most basic role, the MRC is a high-quality DDCthermostat. It is easily configurable to control virtuallyany FCU or other Heating, Ventilating, and AirConditioning (HVAC) equipment found in hotelguestrooms. The MRC is programmable through thefront keypad, allowing the thermostat to be configuredto the specific equipment requirements (that is, 4-pipe;2-pipe with reheat; 1, 2, or 3 speed fan). It providesprecise temperature control and automaticallydetermines proper valve and fan speed settings,eliminating the need for manual switching betweenheating and cooling modes.

The MRC as a Standalone Energy ManagementSystem (EMS)

Following are the three items needed for StandaloneEMS:

• the MRC Digital Thermostat

• a motion sensor (PIR)

• a door switch (wired or wireless)

Including the optional on-board motion sensor on theMRC, the actual number of components can bereduced to two: the MRC and a door switch.

The concept of Standalone Energy Management forguestrooms using the MRC is simple. The MRCcontrols the HVAC equipment in the guestroom andcan automatically execute a number of energy savingactions including:

• establishing minimum and maximum temperaturesettings (for example, 65°F [18°C] and 82°F [28°])to prevent overcooling or overheating a room.

• turning the HVAC equipment off when the entrydoor (or lanai/balcony door) is left open for anextended period of time.

• allowing the temperature to drift up or down withina band when the room is not occupied. This is themost significant factor and typically results inenergy savings of 15% or more.

It is important to note that all of the actions taken bythe MRC are software programmable. All actions canbe adjusted to best suit the needs of a particular hotelproperty.

A standalone energy management system can bequickly installed at a cost to the hotel or motel, whichcan provide a payback in 18 months or less.

The MRC as a Centrally Controlled EMS

Following are the four items needed for CentrallyControlled EMS:

• the MRC Digital Thermostat with motion sensorand door switch

• a Floor Bridge (MRC19-SFB-x or MRC19-DFB-x)on each floor (each bridge serving up to 50 rooms)

• a Riser Bridge (MRC19-DRB-x [serving up to 50floors])

• a Central Interface Server (CIS) (serving up to8 Riser Bridges) with associated Windows®Personal Computer (PC) display terminals

Standalone energy management in guestrooms isachieved principally by setting the temperature back(that is, allowing it to drift up or down within aprogrammable band) when the guestroom isunoccupied.

Centrally controlled energy management significantlyincreases savings by adding a broader setback bandwhen the guestroom is not rented. This will typicallyresult in an additional 10% - 15% savings resulting intotal savings with centrally controlled EMS of usuallymore than 25%.

Additionally, the unoccupied setback band can now beautomatically programmed above and below the “lastguest temperature setting.” For example, if the guest’slast setting was 70ºF (21°C), the unoccupied setbackmight be programmed for +/- 3ºF (-16°C) or 67ºF(19°C) to 73ºF (23°C). Since the guest typically entersthe room from an external environment which is cooleror warmer than the unoccupied setback level, thesmall temperature difference is not noticeable, and themoment the entry door is opened, the MRCautomatically adjusts the temperature to the lastsetting and displays that as SET temperature. After afew minutes, actual room temperature will return to theguest’s last setting, as the MRC manages FCUoperation to achieve that temperature.

The net result is a happier, more comfortable guestand greater energy savings for the hotel.

All the MRC setbacks are software programmable and,with central control, all can be remotely programmedfrom a Central Interface Terminal (CIT) with no need tovisit each room. Once set, setbacks becomeautomatic. This flexibility and system power arehallmarks of central control and contribute greatly toimproved hotel operating efficiencies and loweroperating costs.

Modular Room Control (MRC) Series Digital Thermostat Product Bulletin 3

Energy Savings

Calculating Energy Savings for EMS

There are many factors that affect energy consumptionand cost, and no two properties are precisely thesame. Here is a short list of the factors:

• climate (degree-days per year) and humidity

• type and age of HVAC equipment

• property type (deluxe, upscale, mid-level, limitedservice, and budget)

• guest demographics (resort gamblers,conventioneers, and business travelers)

• occupancy rates (during summer, winter, andshoulder seasons)

• guestroom area vs. public area

• non-guestroom facilities (in-house laundry,swimming pool, and restaurants)

• cost of electricity (per Kilowatt-Hour [KWH] plusadditional demand charges, if applicable)

• as appropriate, cost of non-electric energy sources(oil, gas, and steam)

• local position of property (for example, woodedarea, beach, and windy hill)

• orientation of property (for example, North orSouth)

• structural characteristics of guestrooms (forexample, K-factor, and window area)

• quality and training of engineering andhousekeeping staffs

• attitude of management

While standalone EMS is assuredly less expensive toinstall than centrally controlled EMS, the addedsavings of a centrally controlled system coupled withsignificant non-energy-related benefits to the propertycan frequently create an attractive system offering.

Property ManagementSystem

Door LockSystem

MetasysSystem

CIS Server

FCU or PTAC

Lighting

Remote Control

Door Bell & DND/MUR

Central Door Lock Control

Monitor Mini-bar

MAKE UPROOM

DO NOTDISTURB

F/ C

OFF/AUTO FAN DISPLAY

DO NOT DISTURB

MAKE UPROOM

Figure 2: System Components


User InterfaceAccurate, fingertip control of the room temperature isaccomplished with this intuitive and attractive userinterface (see Figure 3). The user interface isenhanced with the illuminated Liquid Crystal Display(LCD), making it possible to interact with thethermostat even in the dark.

The UP and DOWN buttons will allow the user tochange the desired temperature in 1°F or 0.5°Cincrements. The °F/°C button cycles betweenFahrenheit and Celsius.

DO NOT DISTURB

F/ C


MAKE UPROOM


F/ C

Figure 3: LCD Display and Control Buttons

The OFF/AUTO button cycles the MRC between OFFand AUTOMATIC modes. In AUTO mode, the MRCautomatically determines optimum valve and fanspeed settings needed to maintain the desiredtemperature. In the OFF mode, only the word “OFF” isdisplayed and the MRC is no longer in control of thefan speed or valve settings, except for maintainingroom temperature between programmed maximumand minimum limits.

The FAN button is only functional when the MRC is inAUTO mode. If pressed, the display will first show thecurrent fan speed. If pressed again, fan speed willcycle to the next higher speed, and that speed will bedisplayed. After 10 minutes, operation reverts to fullAUTO in which the MRC sets the fan speed bestsuited to maintain the desired temperature.

The DISPLAY button cycles between the desiredtemperature and the actual temperature. When theMRC is activated and in AUTO mode, the desiredtemperature will automatically be displayed. The actualtemperature will only be displayed if the DISPLAYbutton is pressed AND will then be displayed for only5 seconds. Following that 5-second period, the displaywill revert to SET temperature.

Digital Thermostat Optional Equipment

On-Board Passive Infrared (PIR) Motion Sensor

For most applications in which the MRC is installed ina guestroom, this is the most cost-effective solution.The built-in PIR has dual sensors and a field ofcoverage of 178° (see Figure 4). It is ordered with thethermostat, and requires no external wiring orcommissioning.

On-Board Infrared (IR) Transceiver

For areas with high labor costs or particularlyrestrictive electrical codes, installation can bepractically wireless with the addition of an on-boardInfrared (IR) transceiver (see Figure 4). With theaddition of this capability, other components of thesystem can become wireless, such as the door orwindow switch.

It also expands the capabilities, when used with the IRremote control, to adjust the temperature from thebedside. If lighting is used and integrated, wirelesslighting can be accomplished.

Do-not-Disturb and Make-up-Room

With the addition of the DND/MUR buttons on theMRC Thermostat (see Figure 4), guests can displaytheir privacy and service needs conveniently and costeffectively. This capability can eliminate the unsightlyand awkward doorknob tags. At the touch of a button,“Do-not-Disturb” or “Make-up-Room” is immediatelydisplayed on the CIT or remotely displayed tohousekeeping and other departments within the hotel.

F/ C


DO NOT DISTURB

MAKE UPROOM

On-Board IR

On-BoardDND/MUR Buttons

On-Board PIR

Figure 4: MRC On-Board Options


Humidity Control

There are a wide variety of strategies for effectinghumidity control, and selection of the most appropriateone depends upon the circumstances at any givenproperty. Factors include: outside humidity andtemperature conditions, make-up air supply methodand the condition of such air, occupancy, and guestcomfort.

One of the simplest methods, usually most appropriatein situations in which humidity is not a seriousproblem, is to simply cycle air conditioning equipmenton at preset intervals and for preset periods of time. Inthe event that the guestroom was rented and therewas guest-activated use of air conditioning, suchcycling would automatically be disabled, as it wouldnot be necessary. The electronic intelligence of theMRC is readily able to handle such humidity cyclingstrategies.

As part of a more sophisticated strategy, the MRC canbe ordered with a humidity sensor installed (seeFigure 5) to execute a number of different strategies.One strategy is that the MRC could enable coolingwhen humidity exceeds a preset value. This strategy,of course, must be dealt with carefully in terms ofpossible negative impact on guest comfort. Anotherstrategy, where allowed, is that the MRC could enableboth heating and cooling simultaneously in order tomaintain target temperature while keeping humiditybelow a maximum threshold.

When the humidity sensor is installed, the MRC canprovide an on-demand relative humidity display. Thedisplay is not available to guests and can be activatedonly by special sequencing of the control buttons onthe face of the MRC. This feature permits, forexample, engineering staff at a property to selectivelymonitor humidity conditions in guestrooms.

HumiditySensor

Figure 5: Humidity Sensor Location

Accessories

Passive Infrared (PIR) Motion Sensor

There are two alternative motion sensors, which maybe used with the MRC thermostat, instead of theon-board version (see Figure 4). When using theexternally mounted versions, the on-board version isnot used.

Wall-Mounted PIR

The wall-mounted PIR is a 3-wire, 12 VDC device andis normally mounted in an upper corner of theguestroom with a view of the bedroom area (seeFigure 6). The field of coverage is 90° in a horizontalplane. Since the field of coverage in the vertical is 45°,it is best to mount the device at a downward angle of15° to 20° for installation in smaller guestrooms.

Door Switch

Bath

MRCThermostat

Wall Mounted PIR

Figure 6: Wall Mounted PIR Field of Coverage

Ceiling-Mounted PIR

The ceiling-mounted PIR is a 3-wire, 12 VDC deviceand is normally mounted near the center of thebedroom ceiling (see Figure 7). The field of coverageis a 360° cone emanating downward and outward at a45° angle from the eye at the center of the device.

Door Switch

Bath

MRCThermostat

Figure 7: Ceiling Mount PIR Field of Coverage


Door Switches

The status of the door (open or closed) triggers thesequence of events that determines the occupancy ofthe room. When the door is opened, the MRCThermostat and the PIR Motion Sensor look for motionwithin the room. Once motion is detected, the MRCThermostat locks into the occupied mode. When thedoor is opened again, if no motion is detected for aperiod of time (default 15 minutes), then the MRC willdetermine the room is unoccupied. This sequenceoperates each time the door is opened.

In addition, when central control is used, the doorstatus can trigger alarms such as door ajar, if the dooris left open or propped open.

There are two choices in adding a door switch input tothe MRC for EMS.

Wired Magnetic Door Switch (MDS)

There are two parts to the MDS (see Figure 8): thewired cylindrical piece, which is installed in the doorframe and wired to the MRC thermostat, and thenon-wired cylindrical magnet, which is installed in thedoor in a location directly opposite the wired piecewhen the door is fully closed.

Wired CylindricalSwitch

Non-Wired CylindricalMagnet

Figure 8: Low Voltage Wired Door Switch

Wireless Magnetic Door Switch (MDS)

The wireless MDS is designed for circumstances inwhich structural limitations or prohibitive cost make itimpractical to use a wired switch. Using a wirelessswitch can significantly reduce installation time andcost, particularly where local code requires conduit forlow voltage wiring. When used, the on-board IRtransceiver option on the MRC thermostat is required(see Figure 4).

An IR transmitter is coupled with the wireless MDS(see Figure 9). The IR transmitter replaces the wiringbetween the MRC thermostat and the door switch. Thetransmitter communicates with the IR receiver in theMRC each time the door opens or closes. The IRtransmitter is available in black or white.

Power is provided by two AAA batteries, supplied withthe transmitter. A low battery signal will be sent to theCentral Interface Terminal if the MRC is networked.

Figure 9: Wireless Door Switch Transmitter

Room System Monitoring

The ability to monitor other systems within the roomadds value and efficiency to the hotel operation. Thefollowing are typical examples:

Guest Room Windows or Sliding Doors

With the installation of an MDS in the windows orsliding doors of a hotel room, the MRC can monitortheir status and use this information to disable theHVAC if left open too long. If multiple windows ordoors are present, then the switches can be wired inseries to present a single Window or Door status. If theguest leaves the window or door open upon checkout,the situation can be quickly communicated to the hotelstaff to prevent possible damage from rain or otheroutdoor conditions.

Mini-bar

Approximately 20% of the hotel/motel rooms in theU.S. have mini-bars. Most of them are non-automated,honor system units in mid-to-upscale hotel properties.Usage statistics indicate that 60% of guests neveropen the mini-bar. Another 10% open it but takenothing, and about 30% actually remove and consumegoods.

Checking mini-bar usage is problematic for both hoteloperators and guests. For operators, it means havingto check all rented rooms (even the 60% in which themini-bar was not opened) to determine whether itemswere removed. And the mini-bar checking typicallycannot be done early enough each day to determineand report usage before many guests check out, sincea high percentage of check-outs are in the earlymorning. For guests, mini-bar checks by hotel staff area nuisance. It means one more intrusive knock on thedoor.

A simple, yet highly effective, means of increasing staffefficiency is a periodic, real-time report of rentedguestrooms in which the mini-bar has been opened.This eliminates the need to check the 60% of therooms in which the mini-bar has not been opened andprovides a specific listing of guestrooms in which it hasbeen opened. It also improves guest comfort byreducing, by more than half, the number of guestroomintrusions for mini-bar checks.


To create a real-time report, a low-cost magneticswitch is attached to the mini-bar door in aninconspicuous location. When the door is opened, theswitch reports the opening to the MRC, which, in turn,reports it over the CINET to the Central InterfaceServer (CIS). Such data is then made available on CITterminals to housekeeping or dedicated mini-bar staff.Of course, this feature is only possible in MRCinstallations that are centrally controlled.

Smoke Detector

IMPORTANT: Neither the MRC SeriesThermostat, nor any component of it, is National FirePrevention Association (NFPA) approved ordesigned for, or intended to be sold as, a primary firesafety system or component thereof.

The MRC Thermostat can be a valuable tool forsecondary reporting of guestroom smoke alarmactivation.

Most local fire codes only require that hotel fireprotection systems report guestroom smoke detectoractivation by area, for example, “7th Floor, West Wing.”Since a centrally controlled system has real-timecommunication with all guestrooms, it is well suited tobe able to report smoke detector activation to securitystaff on a guestroom-specific basis.

A smoke detector with a normally open contact isrequired to implement guestroom-specific smokedetector annunciation. Such contact can be connectedto the MRC Thermostat with a low voltage twisted pairof wires.

Other Binary Inputs

Additional binary events can be monitored, such as“Water-on-the-Floor” and “SOS” signal. These types ofevents require external input sources, but couldlogically be added to any system and be monitoredand reported at a central location.

Guest ConvenienceConvenient interaction with the hotel and staff is amajor concern for your guests. You can facilitate thiscommunication through the MRC by integrating thefollowing functions into the rooms. These functions canbe used as separate systems or combined.

“Do-not-Disturb” and “Make-up-Room”

These functions can be integrated within the MRCthermostat, and provide the most cost effectivesolution for sending these important guest messagesto the hotel staff (see Figure 10). When used with aCentrally Controlled System, housekeeping and otherstaff can be informed of the guest’s requests.

On-BoardDND/MUR Buttons

DO NOT DISTURB

MAKE UPROOM

Figure 10: MRC with DND/MUR

INNtouch

INNtouch is a convenient, easy way for guests todisplay their privacy and service needs. INNtoucheliminates unsightly, awkward doorknob tags andprovides a pleasing doorbell chime to announce staffand other guests. At the touch of a button,“Do-not-Disturb” or “Make-up-Room” is immediatelydisplayed on the corridor wall plate (see Figure 11).

With the use of the motion detector inside the room,INNtouch allows the staff to determine the occupancyof a room without knocking or yelling through the door.This reduces embarrassing intrusions on the guest.

INNtouch operates on a standalone basis orseamlessly integrates in the Centrally ControlledSystem to remotely display guestroom status tohousekeeping and other departments within the hotel.

Do Not Disturb

MAKE UPROOM

DO NOTDISTURB

Figure 11: DND/MUR Package


Central Electronic Lock System (CELS)Another important benefit of installing the MRC systemis the ability to perform online lock control. By adding asmall infrared transceiver in the ceiling or on the wallnear the entry door, two-way, real-time communicationis established with each lock. The Central InterfaceServer (CIS) is then interfaced with the lock controlPC, and a powerful, fail-safe central lock controlsystem is established. The benefits are many,including:

• elimination of incorrect key card issuances

• simplified guest check-in procedures

• centralized staff and guest card cancellation

• real-time tracking of hotel employees

• detailed, unlimited access audit trail

• automatic time synchronization of all locks

• door ajar and forced entry alarms

• card cancellation upon checkout

• remote late check-out key card extension

• greater guest security

IMPORTANT: CELS capability requires theaddition of an IR Transceiver to be added to the lockmechanism, by the lock manufacturer. SafeLoc andTimeLox are the two companies that have integratedwith this system.

Expansion CapabilitiesThe MRC System has the ability to expand itsinput/output capabilities with the use of expansionboards. The expansion board allows control of theFCU or PTAC to be moved from the MRC Thermostatto a location that may better fit the specific needs ofthe hotel. For example, in a retrofit situation, there maynot be enough existing wires between the originalthermostat and the FCU. These wires could be usedas the local bus between the MRC Thermostat and theexpansion board, and the expansion board could belocated within the FCU to control the outputs. Anotherpossibility is using these boards as lighting controls.

The expansion boards communicate to the MRCThermostat through a wired connection or wirelesswhen used in conjunction with the IR transceiver.

5-Triac Expansion Board

The MRC19-EXP1 Triac Expansion Board is used toexpand the functionality of the MRC Thermostat when24 VAC triac operation is an option. It is used tocontrol other compatible low voltage relays or lowvoltage loads, such as a valve. This expansion boardalso has two additional Binary Inputs that could beused to monitor the window, used with an Aquastat forseasonal changeover, or monitor the compressoralarm on a Heat Pump.

This expansion board is also used as the motherboardfor the other expansion options.

6-Relay Expansion Board

The MRC19-EXP2 Relay Expansion Board has sixSingle-Pole, Single-Throw (SPST), 100-300 VAC20 Ampere relays on-board. Relays five and six can beconfigured to switch as a pair, allowing both legs of thecircuit to be controlled. The expansion board would beused where the use of triac switching on low voltage isnot preferred, or when line voltage switching isrequired. Typical applications would include linevoltage switching in FCU or PTAC units or lightingcontrols.

Analog Expansion Boards

The MRC19-EXP3 and -EXP4 expansion boards withproportional control capabilities can be used to provideproportional control (0-10 VDC) capabilities for hot orcold water valves when required.

The MRC19-EXP3 combines the MRC19-EXP1 5-triacboard with an additional Analog Output board.

The MRC19-EXP4 combines the MRC19-EXP26-relay board with an additional Analog Output board.

IR Transceiver (EYE)

The MRC19-EYE0 IR transceiver allows wirelesscommunication from the MRC Thermostat to theexpansion boards. It can be surface mountedunderneath the PTAC/FCU or mounted within a J box,behind a Decora style cover plate. Line of sight to theMRC thermostat is not required to communicateeffectively. Power for the IR transceiver is provided bythe expansion board.


Lighting ControlThe lighting controls that accompany the MRC Systemadd exceptional versatility to the guest room. Withcontrols designed specifically for hotel guest rooms,standard lamps or existing circuits can be configuredto work in conjunction with the MRC system. Inaddition to providing the guest with the ability toremotely control their lighting environment, thesecontrols can have other high-impact guest satisfactionvalue. For example, the MRC thermostat can beprogrammed to automatically turn on one or moreselected lights when the guest first enters the roomafter checkin, creating a warm, welcoming guestroomambiance.

Additional benefits include:

• automatic bulb outage reporting

• extended light bulb life by use of soft on operationof lights at slightly less than maximum ratedvoltage

• repeater capability to relay IR commands to otherdevices, not readily accessible

Lighting Module

The MRC19-LMP0 Lamp Module operates with apower supply that can be installed in an out-of-sightlocation. This device connects in the power line of thelamp, and provides for local on/off control. It can alsobe controlled wirelessly through the IR transceiver.

Wireless Wall Switch

The MRC19-LMP1 light switch provides wirelesscontrol of an existing or new hard-wired light circuit. Itreplaces any existing light switch where the circuitconsists of both a phase and neutral conductor.Standard Decora style cover plates can be used, so itcan be easily integrated within the existing roomdesign.

In addition to controlling the lighting, the light switchacts as a junction for other system components. It hasan input connection available for the MRC19-MDS0Magnetic Door Switch, eliminating the need for aseparate transmitter. It can be ganged with otherelectrical switches or with other products such as theMRC19-PKG0 DND/MUR/Chime package. The built-in12 VDC power supply is sufficient to provide power forthe DND/MUR/Chime package and a remote PIRmotion sensor, eliminating the need for a separatepower supply or wiring from the MRC DigitalThermostat.

When combined with these other systems, thisversatile light switch creates an attractive and costeffective solution to wiring multiple systems, whileusing wireless capabilities (see Figure 12).

Figure 12: Wireless Wall Switch with DND/MURMounted Together

Lighting Circuits and Scenes

With the use of these two devices and the expansionboards shown earlier, creative and guest-pleasinglighting control can be accomplished. Lighting scenescan be created to display a soft lighting feel whenentering the room. The last level of lighting can besaved and reenergized upon subsequent returns to theroom. Upon checkout, the lighting scenes can be resetto the original levels.

Upon checkout, all lights within the room can bede-energized, saving energy for the hotel, andextending the life of the light bulbs.

Additional Features

Handheld Infrared Temperature Control

The Handheld Remote Controller is a powerfullow-cost guest amenity. It seamlessly integrates roomcontrol into an intuitively easy-to-use device.In addition to controlling all standard TVs, includingthose used with pay-per-view systems, the handheldremote controller can provide guests with the ability toremotely control lighting, temperature settings, andautomated draperies.


Ordering Information

- - --1

Humidity Sensor Option

0 = No Humidity Sensor1 = Humidity Sensor

Passive IR Option

0 = No Passive IR1 = Passive IR

DND/MUR Option

0 = No DND/MUR1 = DND/MUR

-

IR Transceiver Option

0 = No IR Transceiver1 = IR Transceiver

Modular Room Control Thermostat

M CR

Voltage Option

3 = 24 VAC Relays4 = 24 VAC Triacs5 = 100-240 VAC Relays6 = 265-277 VAC Relays

9 -

Figure 13: MRC Thermostat Ordering Information


Table 1: Accessories

Description Part Number Corresponding LiteratureExpansion Boards

5-Triac Expansion Board MRC19-EXP1

6-Relay Expansion Board MRC19-EXP2

5-Triac/2 AO expansion Board MRC19-EXP3

6-Relay/2 AO expansion Board MRC19-EXP4 Lamp and Lighting Control Devices

IR Lamp Module - Non-Dimming MRC19-LMP0

IR Wall Switch - Non-Dimming MRC19-LMP1 Motion Sensors

Passive IR Sensor, Wall Mounted MRC19-PIRW MRC Series Motion Detector SensorsInstallation Instructions (Part No. 24-9778-49)

Passive IR Sensor, Ceiling Mounted MRC19-PIRC MRC Series Motion Detector SensorsInstallation Instructions (Part No. 24-9778-49)

IR EyesSmart IR Eye to Communicate with Locks,Wall Mounted

MRC19-SIRW

Smart IR Eye to Communicate with Locks,Ceiling Mounted

MRC19-SIRC

Do-Not-Disturb/Make-Up-Room/Door ChimePackaged Set of DND/MUR/Chime IncludingWiring Harnesses

MRC19-PKG0 DND/PUR/Door Chime Kit InstallationInstructions (Part No. 24-9778-22)

PeripheralsOversized Adapter Plate 6.25” x 6.25” MRC19-PLT0

Magnetic Door Switch, Wired, Core Mount MRC19-MDS0

Magnetic Door Switch, Wired, Surface Mount MRC19-MDS1

IR Transmitter w/ MRC-6MDS-0 (white) MRC19-MDS2

IR Transmitter w/ MRC-6MDS-0 (black) MRC19-MDS3

Remote IR Transceiver for Extender Cards MRC19-EYE0


Technical DataProduct MRC Series Digital Thermostat

Power Requirements 24 VAC at 60/60 Hz, 24 VDC Nominal, 2.4 VA (MRC19-3xxxx and MRC19-4xxxx)100 to 240 VAC at 50/60 Hz, 2.4 VA (MRC19-5xxxx)265 to 277 VAC at 50/60 Hz, 2.4 VA (MRC19-6xxxx)

Relay Contact Rating 240 VAC, 2 ampere maximum

Triac Contact Rating 50 mA minimum, 250 mA maximum

Recommended Wire Size 18 Gauge

Thermostat MeasurementRange

33 to 99°F (1 to 37°C)

Outdoor Air TemperatureIndication Range

0 to 99°F (-18 to 37°C)

Display Resolution Setpoint: one decimal point; actual temperature zero decimal point for °F and one decimalpoint for °C

Minimum Deadband 2°F (1°C) between heating and cooling

°C/°F Conversion Button located on front display

Ambient OperatingConditions

41 to 149°F (5 to 65°C) 0-95% RH non-condensing

Ambient StorageConditions

33 to 149°F (1 to 65°C)

Dimensions (H x W x D) 4.7 x 4.7 x 1.2 in. (120 x 120 x 30 mm)

Shipping Weight 0.6 lb (0.27 kg)

FCC Compliance This equipment has been tested and found to comply with the limits for a Class B digitaldevice, pursuant to Part 15 of the FCC Rules. These limits are designed to providereasonable protection against harmful interference when the equipment is operated in acommercial environment. This equipment generates, uses, and can radiate radio frequencyenergy and, if not installed and used in accordance with the instruction manual, may causeharmful interference to radio communications. Operation of this equipment in a residentialarea is likely to cause harmful interference, in which case the user will be required tocorrect the interference at his own expense.

The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond thesespecifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication ormisuse of its products.

Controls Group507 E. Michigan StreetP.O. Box 423 Printed in U.S.A.Milwaukee, WI 53201 www.johnsoncontrols.com

http://www.johnsoncontrols.com/

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