Greystone Energy Systems HAHRC Series User manual

Page 1
INTRODUCTION
The high accuracy room RH transmitter uses a highly accurate and eld-proven
RH sensor in an attractive, low prole enclosure to monitor room relative
humidity levels. Additional options include an occupancy override button, a
communication jack, a fan speed switch, a slide-pot setpoint control, a resistive
temperature sensor and a LED or LCD display. The RH output can be selected as
a linear 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 ammable
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 do not exceed the device ratings.
MOUNTING
The high accuracy room RH transmitter installs directly on a standard
electrical box and should be mounted ve feet from the oor of the
area to be controlled. Do not mount the sensor near doors, opening
windows, supply air diusers 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 rst. 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.
Figure 1
Figure 2
Figure 3 Figure 4
Cover PCB Backplate
IN-GE-HAHRCXXX-02 Copyright © Greystone Energy Systems, Inc. All Rights Reserved Phone: [phone] Web: www.greystoneenergy.com
High Accuracy Room Relative
Humidity Transmitter
HAHRC Series - Installation Instructions

Page 2
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 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.
For 4-20 mA two-wire loop-powered operation, only the POWER
and OUTPUT terminals are required if a DC power supply is used.
The COMMON terminal is only used for AC power or for a voltage
output signal type. If the signal type is set to voltage, or a 24 volt
AC power supply is used, connect the positive dc voltage or the hot
side of the ac voltage to the terminal marked POWER and the power
supply common is connected to the terminal marked COMMON.
The device is reverse voltage protected and will not operate if
connected backwards.
For three-wire voltage output operation, connect either an AC
or DC power supply to POWER and COMMON and the voltage
output signal is available on the OUTPUT terminal with respect to
COMMON as shown in Figure 6.
Ensure the controller Analog Input (AI) matches the transmitter
output signal type before power is applied and that the pcb
switches are set correctly for the required signal type. The current
signal has a maximum load that it will drive and the voltage signal
has a minimum load rating. Follow the ratings in the Specication
section or inaccurate readings may result.
This device has a half-wave power supply so the power 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
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.
Figure 5
Figure 6
0001297
OVERRIDE
4
LED -
LED +
SWITCH -
SWITCH +
TEMP -
TEMP +
123
POWER
COMMON
FAN -
FAN +
SETPNT +
OUTPUT
SETPNT -
412 3
10v
5v
Vdc
mA
ZERO
SPAN
Wiring for voltage output signal and
24 Vdc power from controller
Wiring for all output signals and
external 24 Vac power transformer
Wiring for 4-20 mA loop-powered output
and external 24 Vdc external power supply
Wiring for 4-20 mA loop-powered output and
external 24 Vdc power from controller
24 Vdc Power Supply
TEMP
Figure 7
Figure 8
Figure 9
Digital Input
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Page 3
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 following optional features are only included if ordered. Wiring
terminals are only present for features ordered.
An optional resistive temperature sensor may also be included in
the device and is connected to the TEMP terminals as shown in
Figure 7.
An optional resistive slide-pot setpoint output signal is available
on the SETPNT + and SETPNT – terminals and can be congured
with various resistance values and the operation can be set for
forward or reverse acting as shown in Figure 8.
An optional override switch output is a dry-contact and is available
on the SWITCH + and SWITCH – terminals and typically connects
to a low voltage digital input of the controller to indicate room
occupancy or override when the button is activated as shown in
Figure 9.
An optional LED input is typically powered by a 5 Vdc digital output from the controller and connects to
the LED + and LED - terminals as shown in Figure 10.
An optional ve position fan speed output signal is congured with ve dierent resistive values and is
available on the FAN + and FAN – terminals as shown in Figure 11.
An optional external jack is internally connected to a four-pin terminal block labeled 1, 2, 3 and 4 and
accepts a four-pin header connector for remote communication with the controller as shown in Figure 12.
START-UP
Verify that the transmitter is properly wired, connections are tight and the mA / Vdc switch is in the correct
position as shown in Figure 13. For voltage output, also ensure the 5V / 10V switch is set correctly for the
required signal type as shown in Figure 14. Apply power and note that the LCD will begin displaying the
RH level (if installed). The output signal will also be available immediately after start-up.
OUTPUT SIGNAL
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.
84 mm
3.3“
119 mm
4.7“
29 mm
1.15 “
82.6 mm
3.25 “
58 mm
2.3 “
DIMENSIONS
Figure 10
Figure 11
Figure 12
Figure 13 Figure 14
LED
Digital Output
5 Vdc
FAN
EXTERNAL JACK
Handheld Output
0-5 Vdc
5V
10V
5V
10V
0-10 Vdc
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Page 4
SPECIFICATIONS
Sensor............................................Thermoset polymer based capacitive
Accuracy .......................................±1% (20 to 80 %RH)
±2% (5 to 95 %RH)
Range.............................................0 to 100% RH non-condensing
Hysteresis .....................................± 3% RH
Reponse Time .............................15 seconds typical
Stability .........................................±1.2% RH typical @ 50% RH in 5 years
Power Supply..............................24 Vac/dc ±10% (non-isolated half-wave rectied)
Consumption @ 24 Vdc ...........20 mA
Input Voltage Eect..................Negligible over specied operating range
Output Signal..............................4-20 mA current loop, 0-5 Vdc or 0-10 Vdc - Jumper selectable
Output Drive @ 24 Vdc ............Current: 550Ω maximum
Voltage: 10KΩ minimum
Output Resolution ....................10 bit PWM
Internal Adjustments ...............ZERO and SPAN pots
Protection Circuitry...................Reverse voltage protected, overvoltage protected
Operating Conditions ..............0 to 50°C (32 to 122°F), 0 to 95 %RH non-condensing
Enclosure Dimensions .............84mm W x 117mm H x 29mm D (3.3" x 4.6" x 1.15")
Enclosure Material.....................White ABS, IP30 (NEMA 1)
Weight ...........................................5.3 oz (150 gm)
Country of Origin.......................Canada
OPTIONAL LCD DISPLAY
Range.............................................00.0 to 99.9 %RH, 3 digit
Size..................................................38.1 mm x 16.5 mm (1.5” x 0.65”)
Digit Height.................................11.43 mm (0.45“)
Symbol ..........................................% RH
OPTIONAL TEMPERATURE SENSOR
Sensor Type .................................Various thermistors or RTD
Sensor Accuracy.........................RTD Class A: ±0.15°C (±0.27°F) @ 0°C (32°F)
RTD 1/3 DIN: ±0.1°C (±0.18°F) @ 0°C (32°F)
RTD 1/10 DIN: ±0.03°C (±0.054°F) @ 0°C (32°F)
NTC Thermistor Type 39: ±0.05°C (±0.09°F), 0 to 70°C (32 to 158°F)
NTC Thermistor Type 55: ±0.03°C (±0.054°F), 0 to 70°C (32 to 158°F)
NTC Thermistor Type 40/46: ±0.1°C (±0.18°F), 0 to 70°C (32 to 158°F)
OPTIONAL SETPOINT ADJUSTMENT
Type................................................Front panel pot, two wire resistive output, 0-10K Ω
Range.............................................0K to 10K Ω standard
Custom spans available...........1K, 2K, 5K, 10K or 20K Ω
OPTIONAL MANUAL OVERRIDE
Type................................................Front panel, momentary pushbutton
Switch ratings .............................50 mA @ 12 Vdc, N.O., SPST
OPTIONAL STATUS LED INPUT (N/A WHEN LCD SELECTED)
Signal Type...................................5 V current limited, 2-wire standard
Color...............................................Yellow (Y), Red (R), or Green (G)
Power Supply..............................5 Vdc standard, 10 or 24 Vdc optional
OPTIONAL COMMUNICATION JACKS
Molex .............................................4-pin header connector to 4-pin terminal block
Requires HHTA - Hand Held Adapter
OPTIONAL FAN SPEED SWITCH
Type................................................Side mounted, 5 position slide switch
Range.............................................O, Auto, Low, Medium, High
Signal .............................................2 wire resistance output : 0, 2, 4, 6, 8K Ω
(Custom ranges available, contact Greystone)
NOTE: The sensor accuracies listed in the specications section apply to the sensing element only prior
to product assembly and may not be reected in the complete assembly.
Due to the measurement uncertainty, it is possible, that the true resistance value of the single delivered
sensor at 0°C can be out of the dened tolerance class. Proling each assembly to take into consideration
lead wire and the attachment method should be completed.
IN-GE-HAHRCXXX-02 Copyright © Greystone Energy Systems, Inc. All Rights Reserved Phone: [phone] Web: www.greystoneenergy.com