Manuals+

INSTALLATION INSTRUCTIONS

MODELS RXRD-11MCDAM3

VERTICAL AIRFLOW ECONOMIZERS

▲ WARNING

THIS ACCESSORY IS TO BE INSTALLED BY A QUALIFIED, LICENSED SERVICE PERSON. TO AVOID UNSATISFACTORY OPERATION OR DAMAGE TO THE PRODUCT AND POSSIBLE UNSAFE CONDITIONS, INCLUDING ELECTRICAL SHOCK, REFRIGERANT LEAKAGE AND FIRE, THE INSTALLATION INSTRUCTIONS PROVIDED WITH THIS ACCESSORY MUST BE STRICTLY FOLLOWED AND THE PARTS SUPPLIED USED WITHOUT SUBSTITUTION. DAMAGE TO THE PRODUCT RESULTING FROM NOT FOLLOWING THE INSTRUCTIONS OR USING UNAUTHORIZED PARTS MAY BE EXCLUDED FROM THE MANUFACTURER'S WARRANTY COVERAGE.

▲ WARNING

DISCONNECT ELECTRICAL POWER TO THE UNIT. FAILURE TO DO SO CAN CAUSE ELECTRICAL SHOCK RESULTING IN PERSONAL INJURY OR DEATH.

▲ WARNING

ADDING POWERED EXHAUST MAY BE REQUIRED IN BUILDINGS WITH EXCESSIVE ENVELOPE AIR LOSSES AND/OR RESTRICTIVE RETURN AIR CONDITIONS TO THE UNIT PREVENTING ADEQUATE RETURN AIR TO THE UNIT WHEN ECONOMIZER IS OPEN TO OUTSIDE AIR.

TOOLS REQUIRED FOR INSTALLATION:

TABLE 1

ITEM DESCRIPTION QTY PART NO.
1 Economizer with actuator and outside air enthalpy sensor 1 ECD-RRC0CC-DCES/XCES
2 Economizer TPNL 1 EC1124
3 Hood left side 1 EC1119
4 Hood right side 1 EC1120
5 Hood divider A/B 1 EC1118/EC1123
6 Hood front support bracket 1 EC1121
7 Permanent water entrainment filter 34 3/4" x 12 1/4" x 1" 1 9460-3413
8 Hardware bag, Hood 1 9908-1080
9 Hardware bag - Siemens controller with attached wiring harness, MAT Sensor 1 9908-1381
10 Patch harness 45-42522-237 1 9908-2571

Note: This economizer meets state and national codes for leakage. The economizer must be installed square with +/- 1/32" to maintain tight damper seal. SEE PAGE 4 FOR ILLUSTRATIONS.

FIGURE 1

Diagram showing the unit with labels for Horizontal Return Cover, Top Filter Access Panel, and Lower Panel.

STEP 1:

Immediately upon receipt, all cartons and contents should be inspected for transit damage. Units with damaged cartons should be opened immediately. If damage is found, it should be noted on the delivery papers and a damage claim filed with the last carrier. Compare carton(s) contents to the PACKAGE CONTENTS List (Table 1) above to note any missing items.

STEP 2:

Remove HORIZONTAL RETURN COVER, TOP FILTER ACCESS DOOR, and LOWER PANEL from the unit and retain screws for reuse (SEE FIGURE 1). Note: the lower panel will be used for the top of the economizer hood. Note: The economizer upper panel is shipped taped to the top of the economizer. Remove and set aside.

STEP 3:

Route the jumper harness as required. Reference the IO for the Jumper Wire Harness for installation.

STEP 4:

Remove the jumper plug (PL36) from economizer harness in HVAC unit. Slide the economizer into the return air section (SEE FIGURES 2 and 3). Screw in place. After economizer is installed, connect unit's 12-pin ECONOMIZER PLUG (PL34) to economizer mating plug (PL38). If not using a field-installed smoke detector kit, reinstall the jumper plug (PL36) into other 12-pin plug from economizer - note this 12-pin plug will have only 3 wires connected to it. If using a field-installed smoke detector, retain the jumper plug (PL36) and attach it to the harness with one of the supplied zip ties for future troubleshooting, then install the smoke detector kit using provided instructions.

STEP 5:

Install outside air sensor on economizer per FIGURE 3, then remove the tape holding relief dampers closed.

FIGURE 2

Diagram showing the economizer plug and smoke detector plug connections. Labels include: 12 PIN (Male) PL34 plug on economizer harness in unit, 12 PIN (Female) PL38 plug from economizer, Either J7 jumper plug or optional smoke detector, Smoke Detector Plug, Economizer Plug, 12 PIN (Male) plug from economizer.

STEP 6:

Install the economizer as shown in FIGURE 2. With supplied screws secure economizer on both side flanges and bottom flange with screws provided. Install ECONOMIZER TPNL (shipped taped to economizer damper) onto unit, at top of economizer (SEE FIGURE 5). This panel provides a transition between the filter door and the hood top. Screw in place through pre-punched hole in panel and into top hole of economizer damper. To ensure proper location, TPNL will be 25 7/8" from bottom of unit (SEE FIGURE 5).

STEP 7:

Locate the lower panel removed in STEP 2. Easier if assembled upside down. Attach the left and right hood side to mounting flange on inside of panel. Use supplied screws to screw in place through pre-punched holes in panel. SEE FIGURE 4.

STEP 8:

Locate hood divider A/B from hood package and assemble it per FIGURE 4 between the Left and Right hood sides using supplied screws.

STEP 9:

Insert the permanent filter into the hood using the hood divider to rest the filter on the hood divider. SEE FIGURE 4.

STEP 10:

Mount the hood assembly to RTU over the economizer. SEE FIGURE 7. You will need to temporarily remove the TPNL to install the hood kit. Then use supplied self tapping TEK screws into hood top as shown in FIGURE 6.

STEP 11:

Remove the unit panel covering the indoor blower section. Mount the provided mixed air / discharge air sensor in the indoor blower section. Wire tied to harness bundle. Connect two black wires with the 2-pin plug to the sensor. SEE FIGURE 9. See wiring diagram. SEE FIGURE 11.

STEP 12:

Installing the Siemens Controller - Secure Controller in the left side of the control panel as shown in FIGURE 10 using existing pre-punched holes. Route the wiring harness as shown in Figure 10 and plug in as shown in Figure 10.

STEP 13:

Reinstall the unit's horizontal return panel and the filter access panel. If the unit has a hinged filter access, screw the hinges into the provided holes in the TPNL.

STEP 14:

Upon unit startup, follow the Siemens economizer controller setup instructions on the following pages. See set points menu.

NOTE: FOR THOSE UNITS WITHOUT PREPUNCHED HOLES FOR THE SIEMENS CONTROLLER, A SEPERATE MOUNTING BRACKET IS INCLUDED. (TO BE ADDED WHEN CONTROLLER IS MOUNTED)

FIGURE 3

Diagram showing the economizer with labels for Outside Air Damper, Outside air sensor mounted here, and Barometric Relief Dampers. An asterisk indicates to attach partially assembled hood onto unit with supplied screws (SEE FIGURE 7).

FIGURE 4

Diagram illustrating the assembly of the TPNL, Left Hood Side, Right Hood Side, Hood Divider A/B, Filter, and Hood Front Bracket.

FIGURE 5

Diagram showing the TPNL and Economizer assembly.

FIGURE 6

Diagram showing the TPNL, Left Hood Side, and Self Tapping Screw connection to the Hood Top (Lower Panel).

FIGURE 7

Diagram showing the TPNL, Hood Top / Lower Panel, Right Hood Side, Hood Divider, and Economizer assembly. An asterisk indicates to install after hood filters are in place.

FIGURE 8

Diagram showing the Economizer Hood, Permanent Filter, and Hood Divider A/B assembly.

FIGURE 9

Diagram indicating where to mount the mixed air sensor.

FIGURE 10

Diagram showing the placement of the Siemens economizer controller and the unit control board in the control compartment of the HVAC unit.

FIGURE 11-WIRING

Wiring diagram for MAT/DAT NTC10K, Siemens economizer controller, and Damper Actuator (2-10V). The diagram details connections for various inputs and outputs including T+, T-, BLACK, COM, OAT, OAH, RAT, RAH, S-COM, S-24V, ACT-FB, ACT-COM, ACT-24V, U, V, G, Y, R, C, and various output terminals like AUX2-O, AUX1-O, Y20, Y21, Y10, Y11, C, R.

Interface Overview

Powering the Economizer Controller

Connect a 24 Vac external power supply source to the following terminals to power the Economizer Controller.

Diagram showing terminals C, R, and Power connection.

LED Indication

Table listing LED descriptions: 1. Free Cooling LED, 2. Sensor LED, 3. DAC LED.

Table detailing LED status for Commissioning mode, Power start-up, Free cooling is running, Free cooling is available but not running, Not economizing when it should, Economizing when it should not, Sensors working ok, Humidity sensor error, CO2 sensor error. Statuses include Yellow Blinking, Yellow On, Green On, Green Blinking, Red Blinking, Red On.

User Interface

Diagram showing the user interface with numbered buttons: 1. One-line LCD, 2. Operation button (Up button), 3. Operation button (Down button), 4. Operation button (Enter button).

Table describing the User Interface functions:

Menu Structure

Menus are displayed in the Economizer Controller as per categories. There are eight first-level menus, each represented by a number on the LCD. Pressing Enter + Up or Down toggles between menus. Submenus follow numbered menus. Pressing Up or Down toggles between submenus. The LCD displays the value of the current submenu. If editable, pressing Enter enters Edit mode.

Example display: 1FREECOOL NO

Table listing menu items:

* See Setup and Configuration [→ 29] for detailed submenus.

Functions

Free Cooling Economizing

Free cooling uses unconditioned outside air to cool the space directly. The Economizer Controller enables or disables free cooling based on the active control mode. It uses hysteresis for smooth switchover. There are four different control modes depending on the sensors used.

Control Mode Used Sensors Enable Free Cooling?
Control Mode 1 Fixed Dry-bulb OA (outside air) temperature sensor and MA (Mixed Air) temperature sensor The outside-air dry-bulb temperature is compared with the set temperature shutoff setpoint. If the outside-air dry-bulb temperature is below the temperature shutoff setpoint, the outside air is used to meet all or part of the cooling demand.
Control Mode 2 Differential Dry-bulb (Dual Dry- Bulbs) OA temperature sensor, RA (Return Air) temperature sensor and MA temperature sensor The outside-air dry-bulb temperature is compared with the return-air dry-bulb temperature. If both OAT and RAT are higher than the temperature high limitation, free cooling is prohibited. If OAT or RAT is lower than the temperature high limitation and the outside-air dry-bulb temperature is lower than the return-air dry-bulb temperature, the outside air is used to meet all or part of the cooling demand.
Control Mode 3 Combination Fixed Enthalpy and Fixed Dry-bulb Control OA temperature and humidity sensor, and MA temperature sensor The outside-air dry-bulb temperature and enthalpy are compared with the set temperature and enthalpy shutoff setpoints. If the outside-air enthalpy is lower than the set enthalpy shutoff setpoint, and the outside-air dry bulb temperature is lower than the temperature shutoff setpoint, the outside air can be used for economizing.
Control Mode 4 Combination of Differential Enthalpy and Fixed Dry-bulb OA temperature and humidity sensor, RA humidity sensor, and MA temperature sensor The outside-air dry-bulb temperature and enthalpy are compared with the temperature shutoff setpoint and return-air enthalpy. If both OA enthalpy and RA enthalpy are higher than the enthalpy high limitation, free cooling is prohibited. If OA enthalpy or RA enthalpy is lower than the enthalpy high limitation, outside-air enthalpy is lower than the return-air enthalpy, and the outside-air dry-bulb temperature is lower than the set temperature shutoff setpoint, then outside air can be used for economizing.

Default hysteresis setting

Hysteresis setting (DB) defaults to 2 °F.

Diagram illustrating hysteresis.

Damper modulation during free cooling

Once outside air is suitable for free cooling, the controller modulates the damper based on MAT (mixed air temperature, default) or OAT (outside air temperature). If MAT is used when free cooling is enabled, MAT setpoint ('3MAT SET') is used for MAT modulating. When MAT falls below the anti-freeze setpoint (3FRZ PROT), the damper either fully closes or opens to the minimum position.

Note: When both free cooling and mechanical cooling are on, damper remains fully open regardless of the modulating logic.

5.2 Location-based Shutoff Setpoints

The Economizer Controller can get location-based temperature and enthalpy shutoff setpoints automatically if it is connected to the Climatix Mobile application. Once a WLAN stick is plugged, the Economizer Controller can establish network connection with the Climatix Mobile application. The temperature and enthalpy shutoff setpoints obtained via the phone or tablet's GPS functionality can then be synchronized to the Economizer Controller.

5.3 Cooling Stage Operation

The Economizer Controller accepts inputs for 1-, 2- and 3-stage cooling inputs, and reroutes to the RTU through the relay connection Y1, Y2 and AUX1/AUX2. The operation of the cooling stages is determined by the availability of Free Cooling provided by the economizer operation mode. See Cooling Stage I/O Logic tables [→ 19]. Based on the use of Free Cooling, the operating modes are as follows:

Economizer condition met Y1 Y2 Cooling Stage 1 Cooling Stage 2
No On On On On
No On Off On Off
No Off Off Off Off
Yes On On On On/Off*
Yes On Off Off Off
Yes Off Off Off Off

Table 1: 1- and 2-Stage Cooling I/O Logic

* If OAT < MAT setpoint (3MAT SET), then Relay 2 is always OFF to disable Cooling Stage 2. Otherwise, if both stages of cooling (Y1 and Y2) are ON for more than a set time (15 minutes by default), Y2 remains ON, and the OAT is higher than MAT setpoint, then Relay 2 energizes to allow Y2 pass-through to enable Cooling Stage 2. If you want to change to another set time, configure '3STG3 DLY' as desired. See Advanced Settings [→ 33] for more details of '3STG3 DLY'.

Economizer condition met Y1 Y2 Y3 Cooling Stage 1 Cooling Stage 2 Cooling Stage 3
No On On On On On On
No On On Off On On Off
No On Off Off On Off Off
No Off Off Off Off Off Off
Yes On On On On On/Off* On/Off*
Yes On On Off On On/Off Off
Yes On Off Off Off Off Off
Yes Off Off Off Off Off Off

Table 2: 1-, 2- and 3-Stage Cooling I/O Logic

* If OAT < MAT setpoint, then Relay 3 is always OFF to disable Cooling Stage 3. Otherwise, if all cooling stages (Y1, Y2 and Y3) are ON for more than a set time (15 minutes by default), Y3 remains ON, and the OAT is higher than MAT setpoint, then Relay 3 energizes to allow AUX1/AUX2 pass-through to enable Cooling Stage 3. If you want to change to another set time, configure '3STG3 DLY' as desired. See Advanced Settings [→ 33] for more details of '3STG3 DLY'.

Multi-Speed Fan Support

The Economizer Controller supports connection to 2- and 3-speed fans. When the unit is equipped with a multi-speed fan, the damper responds to multiple fan speeds via multiple minimum positions (MIN POS) to keep minimum airflow. A multi-speed fan is not controlled by the Economizer Controller but an external logic board.

Y1 Y2 Spd L1) Spd H2) PosL3) PosH4)
X X X X X X
X X X X X X

Table 3: Damper MIN POS for 2-Speed Fan (No W1 or O/B)

Y1 Y2 W1 or O/B = B (Heating) OB = O (Cooling) Spd L1) Spd H2) PosL3) PosH4)
X X X X X X X X
X X X X X X X X
X X X X X X X X

Table 4: Damper MIN POS for 2-Speed Fan (With W1 or O/B)

1 Spd L = Low Speed (Fan)

2 Spd H = High Speed (Fan)

3 PosL = Damper MIN POS for Low-Speed Fan

4 PosH = Damper MIN POS for High-Speed Fan

Y1 Y2 Y3 Spd L1) Spd M2) Spd H3) PosL4) PosM5) PosH6)
X X X X X X X X X
X X X X X X X X X
X X X X X X X X X

Table 5: Damper MIN POS for 3-Speed Fan (No W1 or O/B)

Y1 Y2 Y3 W1 or O/B = B (Heating) OB = O (Cooling) Spd L1) Spd M2) Spd H3) PosL4) PosM5) PosH6)
X X X X X X X X X X X X
X X X X X X X X X X X X
X X X X X X X X X X X X
X X X X X X X X X X X X

Table 6: Damper MIN POS for 3-Speed Fan (With W1 or O/B)

1 Spd L = Low Speed (Fan)

2 Spd M = Medium Speed (Fan)

3 Spd H = High Speed (Fan)

4 PosL = Damper MIN POS for Low-Speed Fan

5 PosM = Damper MIN POS for Medium-Speed Fan

6 PosH = Damper MIN POS for High-Speed Fan

If a single-speed fan connects to the Controller, it opens directly on the call of cooling/heating. The damper position is PosH.

1-stage Cooling2) 2-stage Cooling2) 3-stage Cooling2)
1-speed Fan1) Spd H3) (regardless of cooling demand, OCC=Yes) Spd H3) (regardless of cooling demand, OCC=Yes) Spd H3) (regardless of cooling demand, OCC=Yes)
2-speed Fan1) Spd L4) (0 or 1 cooling demand) Spd L4) (0 or 1 cooling demand) Spd L4) (0 or 1 cooling demand)
Spd H3) (2 cooling demands) Spd H3) (2 cooling demands) Spd H3) (2 or 3 cooling demands)
3-speed Fan1) Spd L4) (0 or 1 cooling demand) Spd L4) (0 or 1 cooling demand) Spd L4) (0 or 1 cooling demand)
Spd H3) (2 cooling demands) Spd H3) (2 cooling demands) Spd M5) (2 cooling demands)
Spd H3) (3 cooling demands)

Table 7: Different Fan Speeds with Different Configured Outputs

1 Configured by '6FAN'.

2 Configured by Y1O, Y2O or Y3O.

3 Spd H = High Speed (Fan)

4 Spd L = Low Speed (Fan)

5 Spd M = Medium Speed (Fan)

If a variable-speed fan is configured, the fan speed control logic is the same with 3-speed fan.

1-stage Cooling2) 2-stage Cooling2) 3-stage Cooling2)
1-speed Fan1) PosH3) (regardless of cooling demand, OCC=Yes) PosH3) (regardless of cooling demand, OCC=Yes) PosH3) (regardless of cooling demand, OCC=Yes)
2-speed Fan1) PosH3) (regardless of cooling demand, OCC=Yes) PosL4) (0 or 1 cooling demand) PosL4) (0 or 1 cooling demand)
PosH3) (2 cooling demands) PosH3) (2 cooling demands)
3-speed Fan1) PosH3) (regardless of cooling demand, OCC=Yes) PosL4) (0 or 1 cooling demand) PosL4) (0 or 1 cooling demand)
PosH3) (2 cooling demands) PosH3) (2 or 3 cooling demands)
PosL4) (0 or 1 cooling demand)
PosM5) (2 cooling demands)
PosH3) (3 cooling demands)

Table 8: Different Damper Minimum Positions with Different Configured Outputs

1 Configured by '6FAN'.

2 Configured by Y1O, Y2O or Y3O.

3 PosH = Damper MIN POS for High-Speed Fan.

4 PosL = Damper MIN POS for Low-Speed Fan.

5 PosM = Damper MIN POS for Medium-Speed Fan.

If DCV (demand control ventilation) is enabled, each fan speed corresponds to two damper position ventilation setpoints (VENT MIN, VENT MAX), e.g., PosL corresponds to 2VENTMIN L... 2VENTMAX L.

1-stage Cooling2) 2-stage Cooling2) 3-stage Cooling2)
1-speed Fan1) 2VENTMIN H to 2VENTMAX H (regardless of cooling demand, OCC=Yes) 2VENTMIN H to 2VENTMAX H (regardless of cooling demand, OCC=Yes) 2VENTMIN H to 2VENTMAX H (regardless of cooling demand, OCC=Yes)
2-speed Fan1) 2VENTMIN H to 2VENTMAX H (regardless of cooling demand, OCC=Yes) 2VENTMIN L to 2VENTMAX L (0 or 1 cooling demand) 2VENTMIN L to 2VENTMAX L (0 or 1 cooling demand)
2VENTMIN H to 2VENTMAX H (2 cooling demands) 2VENTMIN H to 2VENTMAX H (2 cooling demands)
3-speed Fan1) 2VENTMIN H to 2VENTMAX H (regardless of cooling demand, OCC=Yes) 2VENTMIN L to 2VENTMAX L (0 or 1 cooling demand) 2VENTMIN L to 2VENTMAX L (0 or 1 cooling demand)
2VENTMIN H to 2VENTMAX H (2 cooling demands) 2VENTMIN H to 2VENTMAX H (2 cooling demands)
2VENTMIN L to 2VENTMAX L (0 or 1 cooling demand)
2VENTMIN M to 2VENTMAX M (2 cooling demands)
2VENTMIN H to 2VENTMAX H (3 cooling demands)

Table 9: Different Damper Position Setting with Different Configured Outputs (DCV is Enabled)

1 Configured by '6FAN'.

2 Configured by Y1O, Y2O or Y3O.

If CO2 sensor is connected but DCV is disabled, each fan speed corresponds to one minimum damper position ventilation setpoint.

1-stage Cooling2) 2-stage Cooling2) 3-stage Cooling2)
1-speed Fan1) 2VENTMIN H (regardless of cooling demand, OCC=Yes) 2VENTMIΝ Η (regardless of cooling demand, OCC=Yes) 2VENTMIΝ Η (regardless of cooling demand, OCC=Yes)
2-speed Fan1) 2VENTMIN H (regardless of cooling demand, OCC=Yes) 2VENTMIN L (0 or 1 cooling demand) 2VENTMIN L (0 or 1 cooling demand)
2VENTMIN H (2 cooling demands) 2VENTMIN H (2 cooling demands)
3-speed Fan1) 2VENTMIN H (regardless of cooling demand, OCC=Yes) 2VENTMIN L (0 or 1 cooling demand) 2VENTMIN L (0 or 1 cooling demand)
2VENTMIN H (2 cooling demands) 2VENTMIN H (2 or 3 cooling demands)
2VENTMIN L (0 or 1 cooling demand)
2VENTMIN M (2 cooling demands)
2VENTMIN H (3 cooling demands)

Table 10: Different Damper Position Setting with Different Configured Outputs (DCV is Disabled, CO2 sensor is connected)

1 Configured by '6FAN'.

2 Configured by Y1O, Y2O or Y3O.

Cooling Delay via Increasing Fan Speed

If there is cooling demand while outside air is suitable for economizing, the Economizer Controller tries to increase fan speed to maximize the use of outside air first. If the cooling demand is not reached within a set time, mechanical cooling will be enabled.

Typical Field Application

Prerequisites:

1. If it is a 2-speed fan and there are two cooling demand inputs/outputs, Y1-Input is called, the controller sets fan speed to Speed Low. Damper is fully open (100%).

2. If it is a 3-speed fan, Y1-Input is called, the controller sets fan speed to Speed Low. Damper is fully open (100%).

3. If a variable-speed fan is configured, cooling delay functions the same with 3-speed fan.

NOTICE: See more information about '2FAN DLY' and '3STG3 DLY' in Setup and Configuration [→ 29]. The default time is 5 and 15 minutes respectively.

Demand Control Ventilation (DCV)

The controller modulates the outside air damper based on the CO2 level through the ppm value selected between the range of 500 and 2000 ppm. The measured CO2 concentration value is compared with the set DCV setpoint. If the measured CO2 concentration value is below the DCV setpoint, keep the damper to the minimum position. Otherwise, enable DCV.

Once DCV is enabled, the DCV PID starts to run to control the indoor CO2 concentration value towards the DCV setpoint. The damper opens to the maximum position.

DCV is disabled if the controller receives no occupancy signal.

Setup and Configuration

Before setup and configuration, it is recommended to obtain some location-based values such as shutoff points or utilize the location services in the Climatix mobile application.

Set up and configure the Economizer Controller before putting it into usage. This can be accomplished by using the Climatix Mobile app or the inbuilt display. After sensor, compressor, thermostat or actuator is connected to the Economizer Controller, values/statuses are displayed in the Operating section of the Climatix Mobile application and on the LCD. You can manually change basic and advanced settings, configure I/Os and test the damper operation and any configured outputs by modifying the corresponding parameter values in the local device or Climatix mobile application. Following chapters describe a complete list of all parameters that you can find on the LCD display. Refer to it during your setup and configuration process. Note that parameters and display menus may display differently/dynamically if different applications are configured.

Not all operations are available on the local POL224.00. For example, you can only obtain shutoff setpoints and perform CFM commissioning via the Climatix mobile application. Setup and configuration on the local device are only recommended if operations from the Climatix mobile application are unavailable. Check the Climatix mobile application for all operations that can be performed from the mobile application end.

By connecting the RS485 port to a PC, all parameters are also readable or writable from PC tools such as Modbus Poll.exe via Modbus and Yabe.exe via MSTP (Bps 38400 (default), Bps 9600, Bps 19200, Bps 115200). Note that an external End of Line (EOL) element is required to achieve Baud Rate 115200 at a maximum cable length of 4000ft (1.2km).

Status Display

Parameter Description Value
1FREECOOL Indicates if the system can use outdoor air for free cooling. YES
1ECON ENAB Indicates if outdoor air is being used for the 1st stage of cooling. NO
1OCCUPIED Indicates if the space is occupied. If you choose 'ALWAYS' for '6OCC' when configuring I/Os, the parameter value is 'YES'; if you keep the default selection 'T-STAT' for '6OCC' and the controller receives 24V signal from OCC input, the value is 'YES'. Otherwise, the value is 'NO'.
1Y1-IN Y1-In call from thermostat for Cooling Stage 1 ON
1Y1-OUT Y1-Out signal to compressor for Cooling Stage 1 OFF
1Y2-IN Y2-In call from thermostat for Cooling Stage 2
1Y2-OUT Y2-Out signal to compressor for Cooling Stage 2 Dynamic item. Appears only if Y2-Out terminal is configured.
1AUX1-1 Aux1-In signal
1AUX1-0 Aux1-Out signal Dynamic item. Appears only if Aux1-In terminal is configured.
Parameter Description Value
1AUX2-1 Aux2-In signal Dynamic item. Appears only if Aux1-Out terminal is configured.
1AUX2-O Aux2-Out signal Dynamic item. Appears only if Aux2-In terminal is configured.
1COMP STAGE Indicates compressor current stage. Off
1
2
3
1HEAT ENAB Indicates if heating is enabled. YES
1MIX AIR LOW Indicates if the anti-freeze protection function is enabled for a mixed air temperature sensor. If the detected air temperature is lower than the anti-freeze protection setpoint (3FRZ PROT), the parameter value is 'YES'. Otherwise, it is 'NO'. NO
1MAT PRES Indicates the present value of the mixed air temperature (MAT) sensor. Dynamic item. Appears only if 'MAT' or 'AUTO' is selected for '3DIF T LOC' under Advanced Settings [→ 33]. The corresponding detected value is displayed on the LCD.
1LAT PRES Indicates the present value of the leaving air temperature (LAT) sensor. Dynamic item. Appears only if 'LAT' or 'AUTO' is selected for '3DIF T LOC'.
1OAT PRES Indicates the present value of the outdoor air temperature (OAT) sensor. Dynamic item. Appears only if an OAT sensor is configured.
1OAH PRES Indicates the present value of the outdoor air relative humidity (OAH) sensor. Dynamic item. Appears only if an OAH sensor is configured.
1RAT PRES Indicates the present value of the return air temperature (RAT) sensor. Dynamic item. Appears only if a RAT sensor is configured.
1RAH PRES Indicates the present value of the return air relative humidity (RAH) sensor. Dynamic item. Appears only if a RAH sensor is configured.
1CO2 PRES Indicates the present value of the CO2 sensor. Dynamic item. Appears only if a CO2 sensor is configured.
1DCV STATUS Indicates the demand control ventilation (DCV) status. Dynamic item. Appears only if a CO2 sensor is configured. Displays ON if the measured CO2 concentration value is above the DCV setpoint and OFF if below the DCV setpoint. ON
OFF
1FAN SPD LV Indicates the current fan speed status (low, medium or high). If a one-speed fan is connected and configured, this item is invisible. If a variable-speed fan is configured, the fan speed control logic is the same with 3-speed fan. Dynamic item. Appears only if '6FAN' is configured as '2SPEED', '3SPEED' or 'VFD FAN' under I/O Configuration [→ 35]. L
M
H
1VFD SPD Indicates the current VFD fan speed. 60%
Parameter Description Value
1ACT OUT Indicates current position of damper actuator in V. Dynamic item. Appears only if '6FAN' is configured as 'VFD FAN'. 80%
100%
1ACT FB Indicates feedback signal of damper actuator in V. The corresponding detected value is displayed on the LCD.
1ACT POS Indicates current position of damper actuator in % Open.
1ACT CNT Indicates number of times actuator has cycled (1 cycle = 180 degrees of movement in any direction). Resettable via HMI item '8ACT CNT RESET' under Enter Running State [→ 38].
1EQUIP Indicates the equipment type. If 'HP(O)' or 'HP(B)' is chosen for '6AUX1-I', the parameter value is 'HP(O)' or 'HP(B)' respectively. If neither is chosen, the value is 'CON RTU'. HP(O)
HP(B)
CON RTU
1INS Indicates the installation date of the Economizer Controller. If the installation date is incorrect, press Enter to change and confirm month, date and year.

Basic Settings

Note: Editable in 1TOP LEVEL. Do not have to use '5ENTER CONFIG?' to change values.

Parameter Description Range Default
2TEMP OFF Temperature shutoff setpoint. Automatically obtainable if a smartphone or tablet is connected to the network, a WLAN stick is plugged into the Economizer Controller and the mobile application is installed on the phone or tablet. You can also manually define this setpoint. 48...80 °F; increment by 1 63 °F
2ENTH OFF Enthalpy shutoff setpoint. Automatically obtainable if a smartphone or tablet is connected to the network, a WLAN stick is plugged into the Economizer Controller and the mobile application is installed on the phone or tablet. You can also manually define this setpoint. Dynamic item. Appears only if an OAH sensor is configured. 22...30 Btu/lbm; increment by 1 28 Btu/lbm
2DCV Demand control ventilation setpoint. Automatically obtainable if a smartphone or tablet is connected to the network, a WLAN stick is plugged into the Economizer Controller and the mobile application is installed on the phone or tablet. You can also manually define this setpoint. Dynamic item. Appears only if a CO2 sensor is configured. 500...2000PPM; increment by 100 1100PPM
2FAN L ACT Damper minimum position when fan runs at a low speed. Dynamic item. Appears only if '6FAN' is configured as '2SPEED', '3SPEED' or 'VFD FAN' under I/O Configuration [→35]. 2...10V; increment by 0.1 3.6V
2FAN M ACT Damper minimum position when fan runs at a medium speed. Dynamic item. Appears only if '6FAN' is configured as '3SPEED' or 'VFD FAN'. 2...10V; increment by 0.1 3.2V
2FAN H ACT Damper minimum position when fan runs at a high speed. Dynamic item. Appears only if '1SPEED', '2SPEED', '3SPEED' or 'VFD FAN' is configured. 2...10V; increment by 0.1 2.8V
Parameter Description Range Default
2VENTMAX L DCV maximum position when fan runs at a low speed. Dynamic item. Appears only if a CO2 sensor is configured and '6FAN' is configured as '2SPEED', '3SPEED' or 'VFD FAN'. 2...10V; increment by 0.1 3.6V
2VENTMAX M DCV maximum position when fan runs at a medium speed. Dynamic item. Appears only if a CO2 sensor is configured and '6FAN' is configured as '3SPEED' or 'VFD FAN'. 2...10V; increment by 0.1 3.2V
2VENTMAX H DCV maximum position when fan runs at a high speed. Dynamic item. Appears only if a CO2 sensor is configured and '6FAN' is configured as '1SPEED', '2SPEED', '3SPEED' or 'VFD FAN'. 2...10V; increment by 0.1 2.8V
2VENTMIN L DCV minimum position when fan runs at a low speed. Dynamic item. Appears only if a CO2 sensor is configured and '6FAN' is configured as '2SPEED', '3SPEED' or 'VFD FAN'. 2...10V; increment by 0.1 3.1V
2VENTMIN M DCV minimum position when fan runs at a medium speed. Dynamic item. Appears only if a CO2 sensor is configured and '6FAN' is configured as '3SPEED' or 'VFD FAN'. 2...10V; increment by 0.1 2.7V
2VENTMIN H DCV minimum position when fan runs at a high speed. Dynamic item. Appears only if a CO2 sensor is configured and '6FAN' is configured as '1SPEED', '2SPEED', '3SPEED' or 'VFD FAN'. 2...10V; increment by 0.1 2.3V
CFM COMM Air Flow Chart. CFM commissioning can only be initiated from the mobile application. When CFM commissioning is in progress, the local device reads 'CFM COMM'. - -
2DEGREES Temperature unit (°F or °C) °F 5000CFM
2FAN Fan CFM 100...50,000CFM; increment by 100
2ERV SET ERV outside air temperature setpoint. Dynamic item. Appears only if 'ERV' is selected for '6AUX1-O' or '6AUX2-0'. 0...50 °F; increment by 1 32 °F
2EX1 L Exhaust Fan 1 low-speed parameter setting. Dynamic item. Appears only if: Exhaust Fan 1 is configured. '6FAN' is configured as '2SPEED', '3SPEED' or 'VFD FAN'. 0...100%; increment by 1 65%
2EX1 M Exhaust Fan 1 medium-speed parameter setting Dynamic item. Appears only if: Exhaust Fan 1 is configured. '6FAN' is configured as '3SPEED' or 'VFD FAN'. 0...100%; increment by 1 60%
2EX1 H Exhaust Fan 1 high-speed parameter setting Dynamic item. Appears only if: Exhaust Fan 1 is configured. '6FAN' is configured as '1SPEED', '2SPEED', '3SPEED' or 'VFD FAN'. 0...100%; increment by 1 50%
2EX2 L Exhaust Fan 2 low-speed parameter setting. Dynamic item. Appears only if: Exhaust Fan 2 is configured. '6FAN' is configured as '2SPEED', '3SPEED' or 'VFD FAN'. 0...100%; increment by 1 80%
Parameter Description Range Default
2EX2 M Exhaust Fan 2 medium-speed parameter setting Dynamic item. Appears only if: Exhaust Fan 2 is configured. '6FAN' is configured as '3SPEED' or 'VFD FAN'. 0...100%; increment by 1 77%
2EX2 H Exhaust Fan 2 high-speed parameter setting Dynamic item. Appears only if: Exhaust Fan 2 is configured. '6FAN' is configured as '1SPEED', '2SPEED', '3SPEED' or 'VFD FAN'. 0...100%; increment by 1 75%
2THL Temperature high limitation Dynamic item. Appears only if an RAT sensor is configured. 0...100%; increment by 1 83 °F
2EHL Enthalpy high limitation Dynamic item. Appears only if an RAH sensor is configured. 22...30 Btu/lbm; increment by 1 33 Btu/Lbm
2FAN DLY Cooling delay via increasing fan speed 0...30 min; increment by 1 5 min

Advanced Settings

Parameter Description Value/Range Default
3FREEZE POS Anti-freeze protection damper position (closed or minimum) CLO
MIN		 CLO
3STG3 DLY Highest stage cooling delay time 0...240m; increment by 5 15m
3SD ACT POS Damper position during shutdown (open or closed) CLO
OPN		 CLO
3DIF T LOC MAT sensor location: Choose 'MAT' if the sensor is installed before the DX (Direct Expansion) coil. Choose 'LAT' if the sensor is installed after the DX coil. Choose 'AUTO' to let the Economizer Controller automatically detect the location. MAT
LAT
AUTO		 LAT
3LAT LOW Low limit of leaving air temperature Dynamic item. Appears only if 'LAT' or 'AUTO' is selected for '3DIF T LOC'. 35...65 °F; increment by 1 45 °F
3LAT HIGH High limit of leaving air temperature Dynamic item. Appears only if 'LAT' or 'AUTO' is selected for '3DIF T LOC'. 70...180 °F; increment by 1 80 °F
3OAT CAL OAT sensor calibration -2.5...2.5 °F; increment by 0.5 0 °F
3RAT CAL RAT sensor calibration Dynamic item. Appears only if an RAT sensor is configured.
Parameter Description Value/Range Default
3OAH CAL OAH sensor calibration Dynamic item. Appears only if an OAH sensor is configured. -10...10%; increment by 0.5 0%
3RAH CAL RAH sensor calibration Dynamic item. Appears only if an RAH sensor is configured.
3MAT CAL MAT or LAT sensor calibration -2.5...2.5 °F; increment by 0.5 0 °F
3MAT SET Setpoint of MAT or LAT sensor 38...70 °F; increment by 1 53 °F
3FRZ PROT Anti-freeze protection setpoint of MAT sensor 35...55 °F; increment by 1 45 °F
3OAT LOCK OAT lockout setpoint for anti-freeze protection -45~80 °F; increment by 1 32 °F

Alarms

Parameter Description
NO ALARM No alarm is activated.
4MAT SEN ALARM MAT sensor has failed, gone out of range or become disconnected.
4CO2 SEN ALARM CO2 sensor has failed, gone out of range or become disconnected.
4OAT SEN ALARM OAT sensor has failed, gone out of range or become disconnected.
4OAH SEN ALARM OAH sensor has failed, gone out of range or become disconnected.
4RAT SEN ALARM RAT sensor has failed, gone out of range or become disconnected.
4RAH SEN ALARM RAH sensor has failed, gone out of range or become disconnected.
4FREEZE ALARM Anti-freeze notification when MAT sensor is below anti-freeze protection setpoint.
4RTU SHUTDOWN Notification of Shutdown Active when 'SHUTDWN' is chosen for '6AUX1-I' or '6AUX2-I'.
4ACTUATOR ALARM Actuator gets disconnected or has failed.
4ACT UNDER V Voltage received by the actuator is below expected range.
4ACT OVER V Voltage received by the actuator is above expected range.
4ACT STALLED Damper actuator stopped before achieving commanded position.
4ACT SLIPPING Damper actuator slips after reaching commanded position.
4NOT ECON Not Economizing when it should
4ECON SHOULDNT Economizing when it should not
4EXCESS OA Excess outdoor air. Outside air intake is significantly higher than it should be.
Parameter Description
4LLA ALARM Leaving air temperature is lower than the low limit (3LAT LOW).
4HLA ALARM Leaving air temperature is higher than the high limit (3LAT HIGH).
4HEAT ALARM Economizer heating error
4COOL ALARM Economizer cooling error

All alarms are dynamic items. An alarm appears only if a related symptom mentioned above is detected. An alarm activation triggers a general alarm, then the configured system alarm output (AUX1-O or AUX2-O) is activated. If there is no alarm, 'NO ALARM' is displayed on the HMI.

Enter Configuration State and Restart

Parameter Description
5CONFIG STATE Change to Configuration State. Press Enter to confirm the change.
5ENTER CONFIG? Confirm the change to Configuration State.
5RESTART Restart the Economizer Controller. Press Enter to confirm the restart.
5CONF RESTART? Confirm the restart.

I/O Configuration

Programming NOTE: The Siemens controller can be programmed using the buttons on the front face of the controller, or a phone app can be used. The phone app, which also allows for many other features, can be downloaded on Android or Apple devices and can be found by searching "Climatix". The controller requires a USB WLAN stick to use the phone app: MicroMetl PN 9901-5057 or Siemens PN POL903.00, and can be removed and reused on other units after programming.

Climatix Phone App: IOS version 15 or later required for IPhone. Default Username: Administrator Default Password: OneBT

Siemens WLAN Stick: Default Password: SIBPAdmin

Parameter Description Value Default
60CC Configures if occupancy status receives signal from the connected thermostat or is displayed as 'ALWAYS' in the Economizer Controller. T-STAT
ALWAYS		 T-STAT
6AUX1-1 None
Cooling stage 3 (Y3) from thermostat
Heat Conventional (W1) from thermostat
Heat pump (reversing valve O)
Heat pump (reversing valve B)
Pre-occupancy signal from thermostat
Shutdown signal from RTU		 NONE
W1
Y3 IN
W1
HP(O)
HP(B)
PREOCC
SHUTDWN		 NONE
6AUX2-1 None
Cooling stage 3 (Y3) from thermostat
Heat stage 1 (W1) from thermostat
Heat pump (reversing valve O)
Heat pump (reversing valve B)
Pre-occupancy signal from thermostat
Shutdown signal from RTU		 NONE
Y3 IN
W1
HP(O)
HP(B)
PREOCC
SHUTDWN		 NONE
Note: Whichever is chosen for '6AUX1-I' doesn't appear in the list of '6AUX2-I'.
6OAT SIG Configures signal type of OAT sensor. 0-10V
NTC10K		 NTC10K
6RAT SIG Configures signal type of RAT sensor. 0-10V
NTC10K		 NONE
6OAH SIG Configures signal type of OAH sensor. 0-10V NONE
6RAH SIG Configures signal type of RAH sensor. 4-20mA NONE
6MAT SIG Configures signal type of MAT or LAT sensor. 0-10V
NTC10K		 NTC10K
6AUX-AI1 Auxiliary Al-1. Configurable as: CO2 sensor
Static pressure (temporarily for CFM commissioning) sensor
None		 PRESSURE
CO2
NONE		 NONE
6X-AI1 SIG Configures CO2 sensor type. 0-10V
2-10V
0-5V		 0-10V
6CO2 Rng L Configures the low limit of CO2 measuring range. 0...500; increment by 10 0
6C02 Rng H Configures the high limit of CO2 measuring range. 1000...3000; increment by 50 2000
6AUX-AI2 Choose 'ACT FB' if feedback signal is available from the connected damper actuator. Otherwise, choose 'NONE'. ACT FB
NONE		 ACT FB
6AUX-AO Choose 'VFD' if a VFD (Variable Frequency Drive) is connected to the Economizer. Otherwise, choose 'NONE'. VFD
NONE		 NONE
6Y20 Choose 'COOL 2' if Cooling Stage 2 is available (another compressor is connected to the Economizer). Otherwise, choose 'NONE'. COOL 2
NONE		 COOL 2
6AUX1-O Auxiliary DO-1. Configurable as: None
Cooling stage 3 output
Exhaust fan (1 or 2)
Variable speed supply fan
Alarm output to thermostat (Title 24)
ERV		 NONE
Y3Q
EXHAUST
SUP FAN
ALARM
ERV		 EXHAUST
6AUX2-O Auxiliary DO-2. Configurable as: None
Cooling stage 3 output
Exhaust fan (1 or 2)
Variable speed supply fan
Alarm output to thermostat (Title 24)
ERV		 NONE
Y3Q
EXHAUST
SUP FAN
ALARM
ERV		 ALARM
Note: Of all but Exhaust Fan, whichever is chosen for '6AUX1-O' doesn't appear in the list of '6AUX2-O'.
6FAN Configures fan speeds of the variable speed supply fan. 1SPEED
2SPEED
3SPEED
VFD FAN		 2SPEED
6RS485 Switch between MSTP and Modbus slave. MSTP
MODBUSSLV		 MSTP

Test

Parameter Description
7DAMPER MIN POS Press Enter to test if the Economizer Controller can drive damper to minimum position.
7DAMPER CLOSE Press Enter to test if the Economizer Controller can drive damper to 100% Closed.
7DAMPER OPEN Press Enter to test if the Economizer Controller can drive damper to 100% Open.
7DAMPER ALL Press Enter to perform all the above tests.
7DAMPER Press Enter to test if the Economizer Controller can drive damper to the selected voltage.
7Y1O Press Enter to test if the Economizer Controller can turn on or off the first stage of cooling (close or open relay Y1O).
7Y2O Press Enter to test if the Economizer Controller can turn on or off the second stage of cooling (close or open relay Y2O).
7AUX1-O Press Enter to test AUX1-O connection (close or open relay AUX1-O).
7AUX2-O Press Enter to test AUX2-O connection (close or open relay AUX2-O).
7AUX AO Press Enter to test if the Economizer Controller can set the AUX AO (VFD0-10) to the selected voltage.

Enter Running State

Parameter Description
8RUN STATE Change to Running State. Press Enter to confirm the change.
8ENTER RUN? Confirm the change to Running State.
8FACTORY DEF Perform factory resetting. Press Enter to confirm the reset.
8DEF CONFIRM? Confirm the factory resetting.
8ACT CNT RESET Damper count reset
8VER x.x.x Firmware version information such as 0.1.10.

Troubleshooting

Symptom Reason Solution
The Economizer Controller/ Mechanical Cooling is not operating No input power Use a multi-meter to check if there is 24 Vac +/- 25% (18 Vac - 30 Vac) at the POWER terminals. If there is no voltage or if the voltage is significantly low, check the transformer output voltage at the RTU. If 24 volts is not present at the transformer secondary side, check the primary line voltage to the transformer. If the line voltage is not present at the transformer primary side, check the primary power to the RTU, fuses, circuit breaker, and so on.
Brownout If voltage is below 17 Volts, the Economizer Controller may be in Brownout Protection mode. This mode disables all of the relay outputs. When the power is 19 Vac or higher, the Economizer Controller and RTU operate normally.
Free Cooling LED is solid RED Y1/Y2 signal is missing from the thermostat Mechanical Cooling doesn't run until there is cooling demand (Y1/Y2 Active). Check the wiring from Y1I and Y2I terminals to the commercial thermostat. 24V should be present between Y1I/Y2I andY1O/Y2O respectively.
Free Cooling LED is blinking RED 24 Vac~ and 24 Vac ± are incorrectly wired 24 Vac power supply has polarity when all devices are powered by the same 24 Vac transformer; reversing polarity may cause a short circuit that can damage the system. Follow the transformer polarity mark, check the wring of 24V~ (or G or 24V+) and ensure that they are tied to the same polar of 24 Vac power supply; while checking the wiring of (or G0 or 24V- or COM) and ensure that they are all tied to another polar of 24 Vac power supply.
Sensor LED is solid RED Sensor, damper or the whole working system may not work properly Check sensor, damper or the whole working system following the detailed alarm information.
Mixed Air (MA) sensor error Check the MA sensor, it must be either a Type II NTC 10K or 0-10Vdc sensor.
Not economizing when it should Outside Air (OA)/Return Air (RA) sensor error Check the wiring and signal of OA sensor. If in Differential (DIFF) mode, check the RA sensor too. The following sensor signals are valid: Type II NTC 10K or 0-10Vdc temperature
0-10Vdc or 4-20 mA humidity
Air temperature failure/fault Check the air temperature sensor signal. The valid signal must be Type II NTC 10K or 0-10Vdc.
Sensor LED is blinking RED Excess outdoor air Check the whole Economizer working system such as sensor, damper and thermostat.
Sensor LED is yellow Humidity sensor error Check humidity sensor connection, sensor signal (under range or over range) and sensor signal type.
Sensor LED is OFF CO2 sensor error Check CO2 sensor connection, sensor signal (under range or over range) and sensor signal type.
DAC LED is blinking RED Damper slippage Check if the damper works properly.
DAC LED is blinking RED quickly Damper unplugged Check if the damper is connected or not.
Symptom Reason Solution
DAC LED is OFF Terminal ACT-FB is configured but no available feedback signal Check if the feedback signal is connected or not; check if ACT-FB is faulty or not.
The controller has no alarm, but the Free Cooling LED never turns on even though the OA seems to be suitable for Free Cooling Shutoff SP setting error The shutoff temperature and/or enthalpy setpoint is incorrectly set up. Consult an HVAC professional to set up the shutoff setpoint correctly.
OA temp is too low The OAT is too low; therefore, there is no cooling demand. This could possibly enable anti-freeze protection.
OA temp is too high or too humid In DIFF mode, even though OA temperature is lower than RA temperature, if both OA and RA temperatures exceed the high limit, Free Cooling turns off. In Differential Enthalpy control mode, even though OA enthalpy is lower than RA enthalpy, if both OA and RA enthalpy exceed the high limit, Free Cooling turns off.
An alarm is displayed on the LCD Sensor, damper or the whole working system may not work properly Check sensor, damper or the whole working system following the detailed alarm information.
RS485 communication failure RS485 signal or configuration error Check wiring, configuration, Baud Rate (using mobile app) and other network communication parameters.
Firmware update failure Application file is damaged Reload a BIN file, restart the controller, update firmware following Firmware Update [→ 28] or change a USB flash disk. Contact your service provider if failure still exists.
WLAN connection failure WLAN stick error or wrong user name and password Plug out and plug in the WLAN stick, enter a correct user name and password, restart the controller or change a WLAN stick. If the WLAN stick is POL903.00/100, the default user name and password are Siemens-WiFi-Administrator and OneBTAdmin. See document CC1N7219en for more details.
Models: RXRD-11MCDAM3, RXRD-11MCDAM3 Vertical Airflow Economizers, Vertical Airflow Economizers, Airflow Economizers, Economizers

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