Summary of Contents for CARNES HXHAS
- Page 1 READ AND SAVE THESE INSTRUCTIONS COmmERCIAl HUmIDISTAT OwNERS mANUAl AND qUICk REfERENCE gUIDE mODElS HXHAS, HXHAST, HXHAw, HXHAwT FORM 16767 ISSUED: 03-10-21...
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Page 2: Caution
Disconnect electrical power to the furnace and humidifier before servicing or starting installation. liability: Carnes does not accept any liability for installations of humidifier equipment installed by unqualified personnel, or the use of parts, components, equipment, or alterations of Carnes manufactured equipment that is not authorized or approved by Carnes. -
Page 3: Table Of Contents
CommerCial humidiStat table of Contents Models HXHAS, HXHAST, HXHAW, HXHAWT ......... 0 Caution ......................2 Packing List ....................4 Humidistat Function ..................5 Complete Installation .................. 6 Duct Installation ..................6 Wall Mount Installation ................. 7 Outdoor Temperature Sensor .............. 8 Location Outdoors ................ -
Page 4: Packing List
E. Drywall Anchors and Screws (2 each) HXHAWT A. Humidistat C. Outdoor Air Temperature Sensor E. Drywall Anchors and Screws (2 each) HXHAS A. Humidistat B. Duct Sensor D. Sheet Metal Screws (3) E. Drywall Anchors and Screws (2 each) HXHAST A. -
Page 5: Humidistat Function
The Carnes commercial humidistats are capable of controlling a humidifier by ON/OFF or modulating 0-10 VDC control signals. The commercial humidistat package offers 2 types of installation and multiple modes of operation to fit any humidification need. -
Page 6: Complete Installation
installation CommerCial humidiStat duct mounted installation 1. Choose a location in the duct that is downstream of the humidifier steam distribution unit. Make sure the humidistat mounting location is close enough to plug in the sensor. install the sensor a minimum of 6”... -
Page 7: Wall Mount Installation
CommerCial humidiStat installation Wire Colors Hook Up Away From Circuit Board Figure 3: Duct Sensor Connection Wall mount installation 1. Select a location in the space that requires humidity control. Typically, the humidistat will be placed in a location with reasonable air flow for accurate environmental measurements. -
Page 8: Outdoor Temperature Sensor
installation CommerCial humidiStat outdoor air temperature Sensor installation When outdoor air temperature is very low, condensation can occur on windows and other surfaces which may cause damage to the structure. To minimize this risk, the outdoor air temperature sensor should be installed. The outdoor air temperature lowers the humidity setpoint to a safe level, where the indoor relative humidity is too low to condense. -
Page 9: Location Outdoors
CommerCial humidiStat installation Caution: electrical interference can cause erratic system operation. • Do not route temperature sensor wiring with building power wiring, next to control contactors, near light dimming circuits, or electric motors. • Use shielded cable to reduce interference when rerouting is not possible. -
Page 10: Location In Outdoor Air Intake
installation CommerCial humidiStat outdoor air intake duct installation Mount the sensor in an outdoor air intake by drilling a ¼ inch hole within 8 inches of outside. Angle the hole towards the outside. Insert the temperature sensor into the intake pipe until the sensor is at least 2 inches outside the structure in the intake pipe. -
Page 11: Wiring
CommerCial humidiStat installation Wiring **turn PoWer oFF to all hVaC eQuiPment BeFore WirinG** Figure 5: Humidistat and High Limit Humidistat Field Wiring Form 16767... -
Page 12: Power Connection Wiring (R, C)
installation CommerCial humidiStat Power Connection Wiring (R, C) The humidistat controller power connections are R and C and will most commonly be powered by the 18VDC supply directly from the humidifier control board. Proper R and C wiring is shown in Figure 5. outdoor temperature Sensor Wiring (odt): The outdoor temperature sensor wires will connect into the ODT terminals on the humidistat terminal block as shown in Figure 5. -
Page 13: Modes Of Operation
CommerCial humidiStat installation modes The Carnes universal humidistat will come set up in the pre-designated configuration but has the ability to change and operate in different control modes depending on the application. The modes are set by toggling DIP-switches located on the back of the main humidistat display board, shown in Figure 6. -
Page 14: Humidistat Demand Mode
operation CommerCial humidiStat humidistat demand mode In the humidistat demand mode, the humidistat will measure the relative humidity of the space, compare the measured value with the setpoint, and output a demand signal to the humidifier. The demand signal in this mode can be either on/off or a modulating 0-10VDC. When measured humidity is 3%RH above the setpoint, the demand signal will be zero. -
Page 15: High Limit Humidistat
0-10VDC signal corresponding directly with the measured humidity (0%RH = 0VDC, 100%RH = 10VDC). This mode can be utilized when the Carnes humidifier has been configured to function using a humidity sensor and not a common humidistat. Utilizing the humidistat and humidifier in this way allows for the user to set the setpoint at the humidifier and not the humidistat. -
Page 16: Operation
operation CommerCial humidiStat Screens and menu home Screen Active Sensor The external duct User Setpoint sensor is unconnected ROOM and the on-board room sensor is active The external duct Measured DUCT sensor is connected Humidity and active Down Enter Outdoor air temperature sensor is connected and active, if unconnected, outdoor temperature... -
Page 17: Settings Page
CommerCial humidiStat operation Settings Page From the Settings page the user can select and adjust how they would like their humidistat to operate. Pressing Enter while on the BACK selection will take the user back to the previous page. Pressing the Enter button once will bring up a settings screen with user selectable options. -
Page 18: Units Option
units option CommerCial humidiStat units option The Units option allows the user to select temperature display units in Fahrenheit or Celsius. Fahrenheit is the default. Form 16767... - Page 19 CommerCial humidiStat notes ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ Form 16767...
- Page 20 (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. 448 S. Main St., PO Box 930040, Verona, WI 53593-0040 Phone: 608\845-6411 Fax: 608\845-6504 www.carnes.com...