GREYSTONE IN-GE-HAHTRCXXX High Accuracy Room Relative Humidity Temperature Transmitter Instruction Manual

GREYSTONE IN-GE-HAHTRCXXX High Accuracy Room Relative Humidity

Temperature Transmitter

Temperature Transmitter

The HAHTRC Series is a room RH/T transmitter that uses highly accurate and field-proven RH and temperature sensors in an attractive, low-profile enclosure to monitor room relative humidity and temperature levels. It comes with additional options including an occupancy override button and an LCD display. The RH and temperature outputs are available in either a 4-20 mA, 0-5 or 0-10 Vdc signal.

Product Before Installation

Read the installation instructions carefully before installing and commissioning the device. Ensure that you do not use it in an explosive or hazardous environment, with combustible or flammable gases, as a safety or emergency stop device, or in any other application where failure of the product could result in personal injury. Take electrostatic discharge precautions during installation and avoid exceeding device ratings.

Product Mounting

The room RH/T transmitter installs directly on a standard electrical box and should be mounted five feet from the floor of the area to be controlled. Do not mount the sensor near doors, opening windows, supply air diffusers, or other known air disturbances. Avoid areas where the detector is exposed to vibrations or rapid temperature changes. The cover is hooked to the base at the top edge and must be removed from the bottom edge first. Use a small Phillips screwdriver to loosen the security screw as shown in Figure 1. Complete removal of this screw is not required. Use the screwdriver to carefully pry each bottom corner if necessary. Tip the cover away from the base and sit it aside as shown in Figure 2. The PCB must be removed from the base to access the mounting holes. Follow usual anti-static procedures when handling the PCB and be careful not to touch the sensors. The PCB is removed by pressing the enclosure base to unsnap the latch near the bottom edge, and then the PCB can be lifted out of the base as shown in Figure 3. Sit the PCB aside until the base is mounted on the wall. For added protection, place the PCB in the supplied anti-static bag. Mount the base by screwing to an electrical box or directly to the wall as shown in Figure 4. The mounting hole locations are shown on page 3. After the base is screwed to an electrical box or the wall using  the appropriate holes, remove the PCB from the anti-static bag, feed connection wires through the center hole, and place the top of the PCB into the PCB holders on the backplate and snap the bottom of the PCB into place as shown in Figure 4. Make wire connections as per the Wiring Illustrations on Page 2 and install decorative cover by placing the top of the cover into the cover holder on the top of the backplate and snapping the bottom into place as shown in Figure 4. Tighten the security screw with a Phillips screwdriver.

Product Wiring

Deactivate the 24 Vac/dc power supply until all connections are made to the device to prevent electrical shock or equipment damage. Follow proper electrostatic discharge (ESD) handling procedures when installing the device or equipment damage may occur.

Product Usage Instructions

1. Read the installation instructions carefully before installing and commissioning the device.
2. Ensure that you do not use it in an explosive or hazardous environment, with combustible or flammable gases, as a safety or emergency stop device, or in any other application where failure of the product could result in personal injury.
3. Take electrostatic discharge precautions during installation and avoid exceeding device ratings.
4. Install the room RH/T transmitter directly on a standard electrical box and mount it five feet from the floor of the area to be controlled.
5. Do not mount the sensor near doors, opening windows, supply air diffusers, or other known air disturbances. Avoid areas where the detector is exposed to vibrations or rapid temperature changes.
6. Remove the cover from the bottom edge using a small Phillips screwdriver to loosen the security screw. Complete removal of thisscrew is not required. Use the screwdriver to carefully pry each bottom corner if necessary. Tip the cover away from the base and sit it aside.
7. Remove the PCB from the base to access the mounting holes. Follow usual anti-static procedures when handling the PCB and becareful not to touch the sensors. The PCB is removed by pressing the enclosure base to unsnap the latch near the bottom edge, and then the PCB can be lifted out of the base.
8. Mount the base by screwing it to an electrical box or directly to the wall using the appropriate holes (mounting hole locations are shown on page 3).
9. After mounting the base, feed connection wires through the center hole, and place the top of the PCB into the PCB holders on the backplate and snap the bottom of the PCB into place.
10. Make wire connections as per the Wiring Illustrations on Page 2 and install a decorative cover by placing the top of the cover into the cover holder on top of the backplate and snapping the bottom into place. Tighten the security screw with a Phillips screwdriver.
11. Deactivate the 24 Vac/dc power supply until all connections are made to the device to prevent electrical shock or equipment damage. Follow proper electrostatic discharge (ESD) handling procedures when installing the device or equipment damage may occur.

INTRODUCTION

The room RH/T transmitter uses highly accurate and field-proven RH and temperature sensors in an attractive, low-profile enclosure to monitor room relative humidity and temperature levels. Additional options include an occupancy override button, and a LCD display. The RH and temperature outputs are available in either a 4-20 mA, 0-5 or 0-10 Vdc signal.

BEFORE INSTALLATION

Read these instructions carefully before installing and commissioning the device. Failure to follow these instructions may result in product damage. Do not use in an explosive or hazardous environment, with combustible or flammable gases, as a safety or emergency stop device or in any other application where failure of the product could result in personal injury. Take electrostatic discharge precautions during installation. Do not exceed device ratings.

MOUNTING

The room RH/T transmitter installs directly on a standard electrical box and should be mounted five feet from the floor of the area to be controlled. Do not mount the sensor near doors, opening windows, supply air diffusers or other known air disturbances. Avoid areas where the detector is exposed to vibrations or rapid temperature changes. The cover is hooked to the base at the top edge and must be removed from the bottom edge first. Use a small Phillips screwdriver to loosen the security screw as shown in Figure 1. (Complete removal of this screw is not required). Use the screwdriver to carefully pry each bottom corner if necessary. Tip the cover away from the base and sit it aside as shown in Figure 2.

The PCB must be removed from the base to access the mounting holes. Follow usual anti-static procedures when handling the PCB and be careful not to touch the sensors. The PCB is removed by pressing the enclosure base to unsnap the latch near the bottom edge, then the PCB can be lifted out of the base as shown in Figure 3. Sit the PCB aside until the base is mounted on the wall. For added protection, place the PCB in the supplied anti-static bag. Mount the base by screwing to an electrical box or directly to the wall as shown in Figure 4. The mounting hole locations are shown on page 3. After the base is screwed to an electrical box or the wall using the appropriate holes, remove the PCB from the anti-static bag, feed connection wires through center hole and place the top of PCB into the PCB holders on backplate and snap bottom of PCB into place as shown in Figure 4. Make wire connections as per the Wiring Illustrations on Page 2 and install decorative cover by placing the top of the cover into the cover holder on the top of the backplate and snapping the bottom into place as shown in Figure 4. Tighten security screw with a Phillips screwdriver.

WIRING

Deactivate the 24 Vac/dc power supply until all connections are made to the device to prevent electrical shock or equipment damage. Follow proper electrostatic discharge (ESD) handling procedures when installing the device or equipment damage may occur. Use 22 AWG shielded wiring for all connections and do not locate the device wires in the same conduit with wiring used to supply inductive loads such as motors. Connect the cable shield to the ground at the controller only. Make all connections in accordance with national and local codes. Connector layout is shown in Figure 5. Diagram shown includes all options. If option is not ordered, connector will not be present. This is a sourcing device and requires from 4 to 12 wires to implement

all the features. Connect the plus dc or the ac voltage hot side to the POWER terminal. The power supply common is connected to the COMMON terminal as shown in Figure 6. The device is reverse voltage protected and will not operate if connected backwards. It has a half-wave power supply so the supply common is the same as the signal common. Several devices may be connected to one power supply and the output signals all share the same common. Use caution when grounding the secondary of a transformer or when wiring multiple devices to ensure the ground point is the same on all devices and the controller.

The analog outputs are available on the RH OUT and TEMP OUT terminals as shown in Figure 6. For 4-20 mA output type, all outputs operate in the Active mode and do not require a loop power supply. This means the signal current is generated by the transmitter and must not be connected to a powered input or device damage will result. Check the controller Analog Input to determine the proper connection before applying power. All output signals are referenced to the COMMON terminal. The analog output signals are typically connected directly to the Building Automation System and used as control parameters or for logging purposes. The device is also available with field-selectable 0-5 or 0-10 Vdc voltage signal outputs which connect directly to a high impedance analog input. In either case the terminal designations are the same and the signals are referenced to COMMON. The OCC IN terminal is a digital input that controls the OCC segment on the LCD to indicate an occupied condition. It can be connected to a 0/5V digital signal or a dry contact signal. This is usually an active low input signal and requires that the OCC IN terminal be shorted to COMMON to activate the input as shown in Figure 7. The override switch output is a dry-contact and is available on the SWITCH + and SWITCH – terminals. It is typically connected to a low-voltage digital input on the controller to indicate room occupancy or override when the button is activated as shown in Figure 8.

START-UP

Verify that the transmitter is properly wired and connections are tight. Apply power and note that the LCD will begin displaying the RH and temperature levels. The display normally toggles between the two values on a 2 second interval. Both output signals will also be available immediately after start- up.

LCD DISPLAY

If the device has both RH and temperature signals, then the multi-function display is factory set to display both measurement values at two second intervals. The RH will be displayed as 0 – 100 %RH for two seconds and then the temperature will be displayed as 0.0 – 35.0 °C for two seconds. This cycle will repeat constantly. The Setup Menu can be used to modify the displayed information. The installer can select to only display RH or temperature continuously. The device supports four temperature ranges that may also be selected in the menu. The default is 0-35 ˚C but this may be changed to 32-95 ˚F and the output signal will stay the same. Also, the temperature range may be changed to 32-122 ˚F or 0-50 ˚C and the output signal scaling will change to match the display.

OUTPUTS
The RH output is scaled such that 4-20 mA (or 0-5 or 0-10 Vdc) equals 0-100 %RH and is temperature compensated over the full 0-50 ˚C temperature range. The temperature output is scaled such that 4-20 mA (or 0-5 or 0-10 Vdc) equals either 0-35 ˚C, 32-95 ˚F, 0-50 ˚C or 32-122 ˚F depending on which range is selected in the menu. The factory default range is 0-35 ˚C. Note that all programmed parameters are saved in non-volatile memory so the device will remember the settings after a power-outage.

SET-UP MENU

The menu has several items as shown below and the device cover must be removed to access the menu. To enter the menu, press and release the