Friedrich EMWRT-1 User manual

Friedrich Wireless Thermostat
with an Occupancy Sensor
EMWRT-1
Instruction Manual
99211002_00

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Table of Contents
Introduction ................................................................................................................4
Installing the Wireless Control Card ................................................................. 5
Mounting the thermostat to the wall ................................................................. 5
Thermostat Conguration...........................................................................................6
Setting the thermostat clock .............................................................................6
Entering the room number ................................................................................7
Conguring the Equipment Settings - Compressor Type...................................7
Conguring the Equipment Settings - Electric Heat ..........................................8
Conguring the Equipment Settings - Reversing Valve .....................................8
Conguring the Energy Saving Settings ...........................................................9
Testing the thermostat ......................................................................................9
Accessing the Thermostat Settings.................................................................10
Custom Energy Savings Settings .............................................................................10
USING THE THERMOSTAT SETTINGS SCREENS ........................................... 11
01 – FAN CONTROL MODE ....................................................................................... 11
02 – 1ST STAGE DIFFERENTIAL - HEAT .................................................................... 11
03 – 2ND STAGE DIFFERENTIAL - HEAT.................................................................... 12
04 – 1ST STAGE DIFFERENTIAL - COOL.................................................................. 12
05 – INCIDENTAL OCCUPANCY THRESHOLD ......................................................... 13
06 – NIGHT OCCUPANCY THRESHOLD ................................................................... 13
07 – FORCED 2ND STAGE HEATING........................................................................ 14
08 – NIGHT OCCUPANCY START ............................................................................. 15
09 – NIGHT OCCUPANCY END .................................................................................15
10 – TEMPERATURE RECOVERY TIME ................................................................... 16
11 – RECOVERY TEMPERATURE - HEAT................................................................. 16
12 – TEMPERATURE SETBACK DELAY - HEAT........................................................ 17
13 – MINIMUM SETBACK TEMPERATURE .............................................................. 17
14 – TEMPERATURE SETBACK DELAY - COOL....................................................... 18
15 – MAXIMUM SETBACK TEMPERATURE .............................................................. 18
16 – RECOVERY TEMPERATURE - COOL................................................................ 19
17 – MINIMUM SETPOINT ......................................................................................... 19
18 – MAXIMUM SETPOINT........................................................................................20
19 – AUTO CHANGEOVER SETPOINT OFFSET....................................................... 20
20 – SETBACK SETPOINTS / AUTO-RESTORE........................................................ 21
21 – TEMPERATURE CALIBRATION ......................................................................... 21

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Thermostat Maintenance..........................................................................................22
Replacing Thermostat Batteries......................................................................22
Troubleshooting .......................................................................................................23
Error Codes ....................................................................................................23
Thermostat is not controlling the PTAC unit. ...................................................23
APPENDIX 1 - Energy Saving Presets .....................................................................24
APPENDIX 2 - Glossary...........................................................................................25
Technical Specications .........................................................................................26Z
Table of Contents

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Introduction
Friedrich Air Conditioning EMWRT-1 Energy Management Thermostat for the hospitality industry
deliver unprecedented energy savings without compromising guest comfort.
Integrated occupancy sensor uses a combination of motion and thermal sensing technologies for
accurate occupancy detection. Reliable occupancy detection allows saving energy when rooms
are unoccupied.
Energy saving presets eliminate the guesswork and make it easy to adjust the energy saving
settings. (Patent Pending)
Fully congurable energy saving settings allow customizing the thermostat energy saving settings
to t any situation.
Large buttons with international symbols make it easy to adjust the temperature in ±1° °F or °C
and control the fan speed.
Comprehensive conguration options ensure full compatibility with virtually any existing or
emerging hospitality HVAC system with up to 2 heat and 1 cool stages.
Built-in wireless mesh-networking enables optional remote management. For installation of a
networking thermostat with remote management, refer to the “Network Installation” manual.
Before You Begin:
➤Determine the appropriate installation location for the thermostat. The thermostat should face
the bed area of the room.
➤Set the PTAC unit to “External Thermostat” (Class 2) mode. Consult the PTAC unit
documentation to determine how to set the PTAC unit to “External Thermostat” mode.
➤Please note that the thermostat and the wireless control card are paired to operate together.
The thermostat cannot be used with another wireless control card. Each PTAC unit requires
a separate thermostat and a wireless control card pair.

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Thermostat Installation
INSTALLING THE WIRELESS CONTROL CARD
➤Unplug the PTAC unit power cord from the electrical outlet;
➤Remove the PTAC cover;
➤Connect the wires to screw terminals on the PTAC unit - refer to the Wiring Table to
determine proper connections.
➤Mount the control card inside of the PTAC unit.
Ensure that the Wireless Control Card antenna is not touching any metal components of the
PTAC unit.
Ensure that the Wireless Control Card Antenna is facing the thermostat on the wall
and is oriented so that any metal parts of the PTAC unit do not obstruct the wireless
communication to the thermostat and, in case of network installation, to other wireless
control cards and the server.
Ensure that the contol card is not and cannot fall into the PTAC unit Condensation Pan.
➤Replace the PTAC front cover;
➤Plug in the PTAC unit power cord into an electrical outlet.
WIRING TABLE
MOUNTING THE THERMOSTAT TO THE WALL
➤Unscrew the xing screw and remove the thermostat cover;
➤Place the thermostat on the wall in the installation location and mark location for drilling holes
for the three (3) mounting screws;
➤Drill three (3) 3/16” holes in the wall and insert the three (3) supplied wall anchors;
➤Use the three (3) supplied #6 x 1”screws to securely mount the thermostat to the wall;
➤Insert two (2) C-cell batteries (not-supplied) into the thermostat battery compartment;
➤Follow the “Thermostat Conguration” instructions to correctly congure the thermostat.
➤Replace the thermostat cover and screw in the xing screw;

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Once the thermostat is powered, thermostat conguration settings will appear on the thermostat
screen.
In order to properly operate the PTAC unit:
➤Set the thermostat clock;
➤Enter the room number;
➤Congure the equipment settings;
➤Select Energy Savings Preset;
The thermostat conguration screens have a 3-minute time-out. If no action is taken within three (3)
minutes, the thermostat will exit conguration settings.
NOTE: If the thermostat is connected to a network, the equipment settings congured on the
thermostat will be ignored and the thermostat settings congured through the network will be
applied.
Thermostat Conguration
SETTING THE THERMOSTAT CLOCK
Set the thermostat clock to current time in 24h (Military Time) format.
➤Use the “Up” and “Down” buttons to set the hours;
➤Press the “Fan” button to advance to the minutes setting;
➤Use the “Up” an “Down” buttons to set the minutes;
➤Press the “F/C” button to advance to the next menu;
Setting the clock correctly is crucial for proper operation of the thermostat.
HOURS MINUTES
CONFIGURATION
BUTTON
NOTE: You can access Thermostat Congu-
ration settings at any time by pressing the
“Conguration” button.

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ENTERING THE ROOM NUMBER
Enter the room number by changing the digits on the screen. Leading zeros “0” preceding
other digits will be ignored, i.e. Room number “123” should be entered as “00123”.
➤Use the “Up” and “Down” buttons to change the digit;
➤Press the “Fan” button advance to the next digit;
➤Press the “F/C” button to advance to the next menu;
Entering the room number correctly is crucial for proper operation of networked thermostats.
Thermostat Conguration
CONFIGURING THE EQUIPMENT SETTINGS - COMPRESSOR TYPE
➤Use the “Up” and “Down” buttons to change the compressor type by changing the rst digit;
0 No Compressor
1 * Heat Pump
2 Air Conditioner
➤Press the “Fan” button to advance to the next setting;
* Indicates factory setting;
COMPRESSOR TYPE

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CONFIGURING THE EQUIPMENT SETTINGS - REVERSING VALVE
➤Use the “Up” and “Down” buttons to change the Reversing Valve setting by changing the third
digit;
0 OB contact is energized to cool;
1 * OB contact is energized to heat;
Refer to the PTAC unit documentation to determine the correct OB VALVE setting.
If incorrect OB VALVE Setting is selected, the PTAC unit will turn on the heating when air
conditioning is requested and turn on the air conditioning when heating is requested;
➤Press the “Fan” button to advance to the next setting;
➤Press the “F/C” button to advance to the next menu;
* Indicates factory setting;
CONFIGURING THE EQUIPMENT SETTINGS - ELECTRIC HEAT
➤Use the “Up” and “Down” buttons to change the Electric Heat setting by changing the
second digit;
0 No Electric Heat
1 * Electric Heat
➤Press the “Fan” button to advance to the next setting;
* Indicates factory setting;
ELECTRIC HEAT
Thermostat Conguration
REVERSING VALVE

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CONFIGURING THE ENERGY SAVING SETTINGS
➤Use the “Up” and “Down” buttons to select the Energy Saving preset:
E-0 Energy Savings Off - No Temperature Setback;
E-1 Lowest Energy Savings;
E-2 Lower Energy Savings;
E-3* Standard Energy Savings;
E-4 Higher Energy Savings;
E-5 Highest Energy Savings;
Refer to the APPENDIX 1 for Energy Saving Preset details.
E-C Indicates “Custom Energy Savings Settings” in case the active thermostat savings
settings differ from any Energy Saving preset;
For details, refer to the “Custom Energy Savings Settings” section;
➤Press the “Power” button to save the Thermostat Conguration and start using the
thermostat;
* Indicates factory setting;
TESTING THE THERMOSTAT
Following the thermostat conguration, test if the thermostat is controlling the PTAC unit.
➤Press the “Power” button to turn the thermostat ON;
➤Press the “Up” and “Down” buttons to change the temperature setpoint above and below
the current room temperature to test if the thermostat initiates heating and cooling - the
PTAC unit should turn heating and air conditioning on and off.
➤Change the fan speed by touching the “Fan” button to test if the thermostat is controlling
the fan speed.
Thermostat Conguration

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If you don’t want to use the one of the energy saving presets listed on page 17 and detailed in
the Appendix 1, you can enter the custom energy savings settings.
ACCESSING THE THERMOSTAT SETTINGS
Press and hold the “Conguration” button until the rst thermostat settings screen appears.
The thermostat must be turned on to access the thermostat settings.
USING THE THERMOSTAT SETTINGS SCREENS
➤Use the “Up” and “Down” buttons to change the setting;
➤Press the “F/C” button to advance to the next setting;
➤Press the “Fan” button to return to the previous setting;
➤Press the “Power” button to save and exit thermostat settings;
CONFIGURATION
BUTTON
NOTE: You can access Thermostat
Settings by pressing and holding the
“Conguration” button.
Custom Energy Savings Settings
SCREEN NUMBER
SETTING VALUE

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01 – FAN CONTROL MODE
Select Fan Control Mode:
00 MANUAL - fguest can select automatic or continuous fan mode;
01 * AUTOMATIC - fan runs only when there is a demand for heating or air conditioning;
* Indicates factory setting;
Custom Energy Savings Settings
02 – 1ST STAGE DIFFERENTIAL - HEAT
02-30 (0.2°F - 3.0°F; 0.5°F* factory setting) Select the number of degrees the thermostat
has to sense between the automatic changeover temperature for heat and the room
temperature before a call for the 1st stage heating is initiated.

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03 – 2ND STAGE DIFFERENTIAL - HEAT
10-20 (1.0°F - 2.0°F*; 2.0°F* factory setting) Select the difference between 1st stage heating
and 2nd stage heating initiation.
04 – 1ST STAGE DIFFERENTIAL - COOL
02-30 (0.2°F - 3.0°F; 0.5°F* factory setting) Select the number of degrees the thermostat
has to sense between the automatic changeover temperature for cool and the
room temperature before a call for the 1st stage cooling is initiated.
Custom Energy Savings Settings

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05 – INCIDENTAL OCCUPANCY THRESHOLD
00-60 (05* factory setting) Select the minimum period of time (in minutes) for which occupancy
needs to be detected to enter the guest occupancy mode.
When occupancy is detected, thermostat will switch to occupied mode for a duration of
“Incidental Occupancy Threshold” selected here.
If occupancy is detected for a period of time shorter than the “Incidental Occupancy
Threshold” selected here, the thermostat will automatically revert to unoccupied mode at
the end of the “Incidental Occupancy Threshold” period and continue to observe energy
saving functions that were in effect before the room became occupied. This setting allows
ignoring incidental room visits.
If occupancy is detected for a period of time longer than the “Incidental Occupancy
Threshold” selected here, the thermostat will enter the guest occupancy mode. When the
thermostat is in the guest occupancy mode, it will revert to unoccupied mode and initiate
the setback temperature only when occupancy is not detected for the duration of the
setback delay (Heat or Cool) period.
06 – NIGHT OCCUPANCY THRESHOLD
00-60 (01* factory setting) Select the minimum period of time (in minutes) for which occupancy
needs to be detected in order to consider the room occupied during the “Night
Occupancy”period.
Custom Energy Savings Settings

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Custom Energy Savings Settings
When occupancy is detected during the “Night Occupancy Period” for longer than the “Night
Occupancy Threshold” selected here, the thermostat will instantaneously switch to occupied mode.
If occupancy is detected for a period of time shorter than the “Night Occupancy Threshold” selected
here, the thermostat will automatically revert to unoccupied mode and continue to observe energy
saving functions that were in effect before the room became occupied.
If occupancy is detected for a period of time longer than the “Night Occupancy Threshold” selected
here, the thermostat will disable the occupancy sensor and consider the room occupied until the end
of the “Night Occupancy” period.
This feature ensures that energy saving functions that may affect guest comfort will not come in
effect during the “Night Occupancy” period.
07 – FORCED 2ND STAGE HEATING
00-60 (30* factory setting) Select a number of minutes 1st stage heating will run before 2nd
stage heating is automatically initiated if the guest setpoint is not reached and the 2nd
stage heating is not initiated through differential settings.
This feature allows automatically turning on 2nd stage heating to avoid excessive
compressor use.
Set to 00 to disable the feature.

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08 – NIGHT OCCUPANCY START
00-23 (21* factory setting) Select the start time (in hours - 24-hour clock) for “Night
Occupancy”
If occupancy is detected for a period of time longer than the “Night Occupancy
Threshold” during “Night Occupancy” period, the thermostat will disable the
occupancy sensor and consider the room occupied until the end of the “Night
Occupancy” period.
This feature ensures that energy saving functions that may affect guest comfort will
not come in effect during the “Night Occupancy” period if room was occupied for a
period of time longer than “Night Occupancy Threshold”.
Custom Energy Savings Settings
09 – NIGHT OCCUPANCY END
00-23 (09* factory setting) Select the time (in hours - 24-hour clock) for “Night Occupancy” to end.
The time of day the “Night Occupancy” ends and the thermostat switches back to the room
sensing settings chosen in the other occupancy modes.

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10 – TEMPERATURE RECOVERY TIME
00-60 (25* factory setting) Select the maximum time allowed for a PTAC unit to attain
temperature as dened by Heat and Cool “Recovery Temperature”;
“Temperature Recovery Time” selected here and the actual temperature recovery
ability of the PTAC unit are used to calculate setback temperatures. Calculated setback
temperatures maximize energy savings and at the same time ensure that a comfortable
room temperature (dened as Heat and Cool “Recovery Temperature”) will be restored
within the selected “Temperature Recovery Time”.
Setting the “Temperature Recovery Time” to “00”, disables temperature recovery. When
temperature recovery is disabled, thermostat will use the Minimum and Maximum Setback
Temperatures as setback setpoints.
Custom Energy Savings Settings
11 – RECOVERY TEMPERATURE - HEAT
62-82 (66°F* factory setting) Select the room temperature in °F that a PTAC unit will have to
attain within the selected “Temperature Recovery Time” when there is a need for heating.

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12 – TEMPERATURE SETBACK DELAY - HEAT
00-120 (20* factory setting) Select the time delay (in minutes) for which the room
that is in the guest occupancy mode needs to be unoccupied before the temperature
setback is initiated.
This feature prevents initiating temperature setback prematurely while the guest is
still in the room but in an area where occupancy cannot be detected by the occupancy
sensor.
Setting the “Temperature Setback Delay - Heat” to “00”, disables the setback in the heat
mode. Set to “00” to disable EMS.
Custom Energy Savings Settings
13 – MINIMUM SETBACK TEMPERATURE
52-72 (64°F* factory setting) Select the “Minimum Setback Temperature” in °F.
Setback temperature is calculated by measuring PTAC unit’s ability to attain “Recovery
Temperature - Heat” within “Temperature Recovery Time”.
If recovery is disabled (“Temperature Recovery Time” is set to “0”) or if setback
temperatures have not yet been calculated, the “Minimum Setback Temperature” value
will be used as the setback temperature for heating.
If calculated setback temperature for heating is lower than “Minimum Setback
Temperature”, then the “Minimum Setback Temperature” will be used as setback
temperature for heating.
This feature allows dening the minimum temperature in a room when room is
unoccupied and the thermostat is in the setback mode.

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14 – TEMPERATURE SETBACK DELAY - COOL
00-120 (20* factory setting) Select the time delay (in minutes) for which the room
that is in the guest occupancy mode needs to be unoccupied before the temperature
setback is initiated.
This feature prevents initiating temperature setback prematurely while the guest is
still in the room but in an area where occupancy cannot be detected by the occupancy
sensor.
Setting the “Temperature Setback Delay - Cool” to “00”, disables the setback in the
cool mode. Set to “00” to disable EMS.
15 – MAXIMUM SETBACK TEMPERATURE
72-92 (78°F* factory setting) Select the “Maximum Setback Temperature” in °F.
Setback temperature is calculated by measuring PTAC unit’s ability to attain “Recovery
Temperature - Cool” within “Temperature Recovery Time”.
If recovery is disabled (“Temperature Recovery Time” is set to “0”) or if setback
temperatures have not yet been calculated, the “Maximum Setback Temperature” value
will be used as the setback temperature for cooling.
If calculated setback temperature for air conditioning is higher than “Maximum Setback
Temperature”, then the “Maximum Setback Temperature” will be used as setback
temperature for air conditioning.
This feature allows dening the maximum temperature in a room when room is
unoccupied and the thermostat is in the setback mode.
Custom Energy Savings Settings

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Custom Energy Savings Settings
16 – RECOVERY TEMPERATURE - COOL
62-82 (75°F* factory setting) Select the room temperature in °F that a PTAC unit will have to
attain within the selected “Temperature Recovery Time” when there is a need for air
conditioning.
17 – MINIMUM SETPOINT
64-84 (65°F* factory setting) Select the minimum setpoint in °F that a guest can select.

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18 – MAXIMUM SETPOINT
60-82 (80°F* factory setting) Select the maximum setpoint in °F that a guest can select.
19 – AUTO CHANGEOVER SETPOINT OFFSET
00-04 (01°F* factory setting) Select the difference between the guest-selected set point and
the heat and cool changeover temperatures.
This value plus the 1st stage differential dened in steps 02 and 04, denes the value
at which the thermostat would automatically change heating/cooling modes.
This feature allows adjustment between heat and cool changeover temperatures to
avoid the system from bouncing back and forth between heating and cooling under
normal operating conditions.
.
Custom Energy Savings Settings