Friedrich EMWRT2 User manual

EMWRT2
Wireless Energy Management
Thermostat with an Occupancy
Sensor
INSTRUCTION MANUAL

3
Table of Contents
Introduction............................................................................................................ 5
Thermostat Installation .......................................................................................... 8
Pairing the Thermostat and the Control Card........................................................ 8
Installing the Wireless Control Card ...................................................................... 9
Mounting the thermostat to the wall..................................................................... 10
Thermostat Conguration.................................................................................... 11
Setting the thermostat clock ................................................................................ 12
Entering the room number................................................................................... 13
Conguring the Equipment Settings - Compressor Type .................................... 14
Conguring the Equipment Settings - Electric Heat ............................................ 15
Conguring the Equipment Settings - Reversing Valve....................................... 16
Conguring the Energy Saving Settings ............................................................. 17
Testing the thermostat ......................................................................................... 18
Accessing the Thermostat Settings..................................................................... 19
Custom Energy Savings Settings........................................................................ 19
Using the Thermostat Settings Screens.............................................................. 20
01 – FAN CONTROL MODE ............................................................................... 21
02 – 1ST STAGE DIFFERENTIAL - HEAT ............................................................ 22
03 – 2ND STAGE DIFFERENTIAL - HEAT............................................................ 23
04 – 1ST STAGE DIFFERENTIAL - COOL ......................................................... 24
05 – INCIDENTAL OCCUPANCY THRESHOLD................................................. 25
06 – NIGHT OCCUPANCY THRESHOLD........................................................... 26
07 – FORCED 2ND STAGE HEATING................................................................ 27
08 – NIGHT OCCUPANCY START ..................................................................... 28
09 – NIGHT OCCUPANCY END ......................................................................... 29
10 – TEMPERATURE RECOVERY TIME ........................................................... 30
11 – RECOVERY TEMPERATURE - HEAT ........................................................ 31
12 – TEMPERATURE SETBACK DELAY - HEAT............................................... 32
13 – MINIMUM SETBACK TEMPERATURE ...................................................... 33
14 – TEMPERATURE SETBACK DELAY - COOL.............................................. 34
15 – MAXIMUM SETBACK TEMPERATURE...................................................... 35
16 – RECOVERY TEMPERATURE - COOL ....................................................... 36
17 – MINIMUM SET POINT................................................................................. 37

4
Table of Contents
18 – MAXIMUM SET POINT ............................................................................... 38
19 – TEMPERATURE CONTROL MODE ........................................................... 39
20 – AUTO CHANGEOVER SET POINT OFFSET (DEAD BAND)..................... 40
21 – SETBACK SET POINTS / AUTO-RESTORE .............................................. 41
22 – AUTOMATIC HUMIDITY CONTROL†.......................................................... 42
23 – TEMPERATURE CALIBRATION................................................................. 43
Thermostat Maintenance..................................................................................... 44
Replacing Thermostat Batteries .......................................................................... 44
Troubleshooting................................................................................................... 45
Error Codes ......................................................................................................... 45
Thermostat is not controlling the HVAC unit........................................................ 46
APPENDIX 1 - Energy Saving Presets................................................................ 48
APPENDIX 2 - Glossary...................................................................................... 49
Warranty Information ........................................................................................... 50
Technical Specications ...................................................................................... 52

5
Introduction
Friedrich EMWRT2 Energy Management Thermostats for the hospitality industry
deliver unprecedented energy savings without compromising guest comfort.
An 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 online management. For
installation of a networking thermostat with online management, refer to the
“Network Installation” manual.

6

7
Before You Begin
➤Determine the appropriate installation location for the thermostat. The
thermostat should face the bed area of the room.
➤ Set the PTAC/ Vert-I-Pak unit to “External Thermostat” (Class 2) mode.
Consult the PTAC/ Vert-I-Pak unit documentation to determine how to set
the PTAC/ Vert-I-Pak unit to “External Thermostat” mode.

8
Before You Begin
Pairing the Thermostat and the Control Card
The Thermostat and Control Card must be paired in order to operate together.
Once paired, the thermostat cannot be used with another wireless control card
without repeating the pairing procedure. Friedrich thermostats are pre-linked with
the card in the box.
In case of Network Installation with Online management, the thermostat and the
Control Card must be paired with a Network Programmer specic to the property
before the installation.
The thermostat and Control Card must not be powered during the pairing
procedure - remove batteries from the thermostat and unplug the control card
from the
PTAC/ Vert-I-Pak unit during the pairing procedure.
➤Plug one programmer connector into the thermostat;
➤Plug the other programmer connector into the control card;
➤Push the black button on the programmer. The red light on the programmer
should turn on and remain steadily lit;
If the red light on the programmer is blinking or is not steadily lit, unplug the
programmer from the thermostat and the control card and repeat the steps
above.
➤Unplug the programmer from the thermostat and the control card;

9
Thermostat Installation
Installing the Wireless Control Card
➤ Unplug the PTAC/Vert-I-Pak* unit from power supply
➤ Connect the low voltage wires to screw terminals on the PTAC/Vert-I-Pak*
unit low voltage terminal block - refer to the Wiring Table to determine
proper connections.
➤ Mount the control card to the PTAC/ Vert-I-Pak* unit.
Ensure that the Wireless Control Card antenna is not touching any metal
components of the PTAC/ Vert-I-Pak* 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/ Vert-I-Pak* unit
do not obstruct the wireless communication to the thermostat and, in case
of a network installation, to other wireless control cards and the server.
Ensure that the control card is secured and cannot fall into the
PTAC/ Vert-I-Pak* unit Condensation Pan.
➤ Plug in the PTAC/ Vert-I-Pak* unit to power supply.
NOTE: If the PTAC/Vert-I-Pak* unit has only one (1) fan speed, connect both fan
control wires – Green and Purple – to the fan terminal (G).
Wiring Table - 24V AC
Wire
Color
Terminal
Letter
Terminal
Connection
Black C Common
Red R 24V
Yellow Y Compressor
White W Heat
Orange O or B Reverse Valve
Green GH Fan High
Purple GL Fan Low
Wiring Table - 24V DC
Wire
Color
Terminal
Letter
Terminal
Connection
Black R 24V
Red C Common
Yellow Y Compressor
White W Heat
Orange O or B Reverse Valve
Green GH Fan High
Purple GL Fan Low
* The wireless control card should never be installed inside the metal electrical control
enclosure/box of the PTAC/Vert-I-Pak unit. Failure to comply will result in obstruction to the
wireless communication. The control card is always to be mounted as shown on the pictures
on the next page.

PTAC Vert-I-Pak
Wireless Control Card-Typical Placement Location
10
Mounting the thermostat to the wall
➤ Remove the thermostat cover;
➤Use the supplied wall anchors and mounting screws to secure the
thermostat to the wall;
➤ Insert two (2) A-Cell batteries (not-supplied) into the thermostat battery
compartment;
➤ Follow the “Thermostat Conguration” instructions;
➤ Replace the thermostat cover and screw in the locking screw;
Thermostat Installation

CONFIGURATION
BUTTON
11
Thermostat Conguration
Once the thermostat is powered, thermostat conguration settings will appear on
the thermostat screen.
In order to properly operate the PTAC/Vert-I-Pak 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.

12
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

13
Thermostat Conguration
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 remotely
managed thermostats.

14
Thermostat Conguration
Conguring 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 default setting;
COMPRESSOR TYPE

15
Thermostat Conguration
Conguring 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 default setting;
ELECTRIC HEAT

16
Thermostat Conguration
Conguring 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 HVAC unit documentation to determine the correct OB
VALVE setting.
If incorrect OB VALVE Setting is selected, the HVAC 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 default setting;
REVERSING VALVE

17
Thermostat Conguration
Conguring 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 default setting;

18
Testing the thermostat
Following the thermostat conguration, test if the thermostat is controlling the HVAC
unit.
➤Press the “Power” button to turn the thermostat ON;
➤Press the “Up” and “Down” buttons to change the temperature set point
above and below the current room temperature to test if the thermostat
initiates heating and cooling - the HVAC 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

CONFIGURATION
BUTTON
19
Custom Energy Savings Settings
If you don’t want to use the one of the energy saving presets 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.

20
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;
Custom Energy Savings Settings
SCREEN NUMBER
SETTING VALUE