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Once the humidity level returns to desired condition, the unit will return to the normal mode. 2 wire installation Dehumidistat - MD-4W - The wall mount dehumidistat offers the same features of the dehumidistat I plus additional off/on control for the HRV. Dial illuminates when in override mode. 4 wire installation Air Quality Sensor - AQS - The wall mount Air Quality Sensor (AQS) monitors indoor air quality and activates the override mode when carbon monoxide, formaldehyde, benzene, volatile organic compounds and other pollutants are detected. The unit will then return to normal mode once the air pollutants are reduced to a pre-determined lower level. * This control is not a warning device. 3 wire installation 15-min Timer - RT-15M - The 15-minute remote timer is typically installed in areas where contaminated such as moisture and odors, are produced. Simply push the button and the HRV will activate to high speed for 15 minutes. Up to 5 electronic timers can be installed throughout the building at a distance of up to 500 feet (152 meters) from the HRV. 2 wire installation OPTIONAL DIGITAL CONTROL DMFC-REC DIGITAL MULTI-FUNCTION WALL CONTROL WITH RECIRCULATION Control multiple functions of your HRV with one slimline wall control. Two wire connec- tion simplifies installation. Use one control per HRV installed. OVERRIDE SPEED CONTROL Push to select override speed of unit. CYCLE CONTROL Set unit to cycle on 15, 20, or 30 min- utes every hour MODE SPEED Set Unit to Low, Medium or High Speed OVERRIDE TIMER When pressed, unit will provide high speed ventilation for one 15, 30 or 60 minute period. DIGITAL DISPLAY Shows Indoor Humidity Level This control will not read below 29% RH DEHUMIDISTAT CONTROL (see description on top of this page) MAINTENANCE LIGHT Light comes on when it’s time to clean unit. POWER On/Off and Reset MODES Select Intermittent, Recirculation or Continuous Ventilation Modes 4 1/2" (114 mm) 5 1/8" (130 mm) Width = 4 1/2" (114mm) Height = 5 1/8" (130mm) Thickness = 5/8" (16mm) * Both digital controls are the same size OPERATION (CONT'D) OPTIONAL DIGITAL CONTROL DIGITAL DISPLAY Shows Indoor Humidity Level This control will not read below 29% RH OVERRIDE TIMER When pressed, unit will provide high speed ventilation for 15 minute period. Once the time elapsed the unit will return to its normal function. To move from one time to the other, continue pressing the timer button until you reach the desired time. POWER On/Off and Reset This function is to turn your unit on or off, in the off posi tion the damper is open and you will feel the cold outside air come in. To go from the on to off position just press once. DEHUMIDISTAT CONTROL The LCD (Liquid Crystal Display) indicates the percentage of Relative Humidity in the air surrounding the control and ultimately in the house. Pressing either of the setpoint selectors ( , ) once, will display the desired RH level. The setpoint selection mode is now activated and can be adjusted with either selectors to a newly desired setpoint. The LCD will return to the actual RH level display after a few seconds. DEHUMIDISTAT CONTROL A Dehumidistat is ideal for use in energy efficient houses where indoor humidity (during the heating season) is higher than outdoor levels. High humidity is a major cause of structure damage and IAQ problems such as mold and mildew. MODES Select Intermittent, or Continuous Ventilation Modes. Continuous This function will exchange outside air with your stale air. Intermittent This function will put your unit on stand by and can be over ride by timer, air quality sensor, etc To move from function to the other, continue pressing the mode button until you reach the desired function. This function goes from Recirculation, Continuous to Intermittent. DMFC DIGITAL MULTI-FUNCTION WALL CONTROL Control multiple functions of your HRV with one slimline wall control. Two wire connection simplifies installation. Use one control per HRV installed. MAINTENANCE LIGHT Light comes on when it’s time to clean unit. This function will let you know when it's time to check your filters and core. To reset your filter light, after you've cleaned or replaced the filters, just push the power button and restart the unit. This will turn the light off and reset the clock for your filter check. FILTER LIGHT RESET & MODE FAN SPEED SELECTOR Press to reset the filter maintenance reminder light. The combination filter light reset and up setpoint selector buttons let’s you choose at which speed the HRV, ERV unit will operate in continuous or recirculation mode only. Pressing the filter light reset button once displays the mode fan speed on the LCD. The LCD should display one of the following three letters, L for Low, M for Medium and H for High. To change the mode speed, press the up setpoint until desired speed is displayed, selector. After 1 second of inactivity, the LCD will return to relative humidity reading. Note: All controls are low voltage. 18 to 24 gauge wire is reco...

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