1 | PIR Ready VT76x7 Series-Installation Guide C ONTENTS Installation 2 Location 2 Installation 2 Theory of operation 3 Features overview 4 Model Chart 5 Network ready 6 Terminal, Identification and Function 6 Wiring 6 Screw terminal arrangement 7 Typical applications 8 Remote humidity sensor accessories 9 Configuring and Status Display Instructions 10 Status display 10 User Interface 12 User configuring instructions menu 12 Local keypad interface 13 Occupied setpoints adjustments 14 Dehumidification process 16 Installer Configuration Parameter Menu 21 Troubleshooting guide 32 Humidity Control 34 Humidity reset 34 High limit humidity sensor 34 Specifications 35 Drawing & Dimensions 36 PIR Ready VT76x7 Series With & Without Local Schedule & With Humidification & Dehumidification Strategy Terminal Equipment Controllers Installation Guide For Commercial HVAC Applications May 3 rd , 2012 / 028-0229-R4 2 | PIR Ready VT76x7 Series-Installation Guide I NSTALLATION Remove the security screw on the bottom of Terminal Equipment Controller cover. Open unit by pulling on the bottom side of Terminal Equipment Controller (fig. 1). Remove wiring terminals from sticker. Please read the FCC ID and IC label installed in the cover upon removal of cover for the wireless products. Location 1. Should not be installed on an outside wall. 2. Must be installed away from any direct heat source. 3. Should not be installed near an air discharge grill. 4. Should not be affected by direct sun radiation. 5. Nothing should restrict vertical air circulation to the Terminal Equipment Controller. Installation 1. Swing open the Terminal Equipment Controller PCB to the left by pressing the PCB locking tabs (fig. 2). 2. Pull out cables 6” out from the wall. 3. Wall surface must be flat and clean. 4. Insert cable in the central hole of the base. 5. Align the base and mark the location of the two mounting holes on the wall. Install proper side of base up. 6. Install anchors in the wall. 7. Insert screws in mounting holes on each side of the base (fig. 2). 8. Gently swing back the circuit board on the base and push on it until the tabs lock it. 9. Strip each wire 1/4 inch from end. 10. Insert each wire according to wiring diagram. 3 | PIR Ready VT76x7 Series-Installation Guide 11. Gently push excess wiring back into hole (fig. 3). 12. Re-Install wiring terminals in their correct locations (fig. 3). 13. Re-install the cover (top side first) and gently push extra wire length back into the hole in the wall. 14. Install security screw. T HEORY OF OPERATION The VT7600 uses a Viconics proprietary adaptive logic algorithm to control the space temperature. This algorithm controls the heating / air conditioning system to minimize overshoot while still providing comfort. It provides exceptional accuracy due to its unique PI time proportioning control algorithm, which virtually eliminates temperature offset associated with traditional, differential-based on/off Terminal Equipment Controllers. Fig.2 - On/Off mechanical control vs. PI electronic control. If replacing an existing Terminal Equipment Controller, label the wires before removal of the Terminal Equipment Controller. Electronic controls are static sensitive devices. Discharge yourself properly before manipulating and installing the Terminal Equipment Controller. A short circuit or wrong wiring may permanently damage the Terminal Equipment Controller or the equipment. All VT7000 series Terminal Equipment Controllers are designed for use as operating controls only and are not safety devices. These instruments have undergone rigorous tests and verification prior to shipping to ensure proper and reliable operation in the field. Whenever a control failure could lead to personal injury and/or loss of property, it becomes the responsibility of the user / installer / electrical system designer to incorporate safety devices (such as relays, flow switch, thermal protections, etc…) and/or an alarm system to protect the entire system against such catastrophic failures. Tampering with the devices or unintended application of the devices will result in a void of warranty. 4 | PIR Ready VT76x7 Series-Installation Guide Features overview 7 day schedule models, 2 or 4 events Gas/oil or electric system compatibility for all type of applications Internal RH sensor and remote RH input with humidification and dehumidification sequence of operation embedded Remote outdoor sensing capability for added flexibility - System mode lock out - Humidity setpoint reset High limit input to prevent over-humidification Lockable keypads for tamper proofing. No need for Terminal Equipment Controller guards Automatic frost protection to prevents costly freeze damage Anti short cycle and minimum on/off run time protection. Reduces wear and maximizes life span of mechanical equipment. Configurable digital input for added flexibility. The input can be configured as the following: None: No function will be associated with the input Service: a backlit flashing Service alarm will be displayed on the Terminal Equipment Controller LCD screen when the input is energized. It can be tied in to the AC unit control card, which provides an alarm in case of malfunction. Filter: a backlit flashing Filter alarm will be displayed on the Terminal Equipment Controller LCD screen when the input is energized. It can be tied to a differential pressure switch that monitor filters Rem NSB: remote NSB timer clock input. Will disable the internal scheduling of the Terminal Equipment Controller. The scheduling will now be set as per the digital input. The menu part related to scheduling is disabled and no longer accessible. It provides low cost setback operation via occupancy sensor or from a dry contact RemOVR: temporary occupancy contact. Disables all override menu function of the Terminal Equipment Controller. . The override function is now controlled by a manual remote momentarily closed contact. When configured in this mode, the input operates in a toggle mode. With this function enabled it is now possible to toggle between unoccupied & occupied setpoints for the amount of time set by parameter (TOccTime) temporary occupancy time. Fan lock: used in conjunction with a local air flow sensor connected to the input. Locks out the Terminal Equipment Controller heating and cooling action and displays a local alarm if no air flow is detected 10 seconds after the fan (G terminal) is energized. Configurable smart fan operation saves energy during night mode Non volatile EEPROM memory prevents loss of parameters during power shortage Built in default profile set-up for easier start up and commissioning Configurable SPST output relay on scheduling models for lighting, exhaust fan or fresh air control 6 hour typical reserve time for clock in case of power loss Built in proportional humidity Terminal Equipment Controller Proportional humidity high limit when used with the analog input for supply humidity Automatic humidity setpoint reset when outside air temperature value is used. 5 | PIR Ready VT76x7 Series-Installation Guide M ODEL C HART 6 | PIR Ready VT76x7 Series-Installation Guide Network ready All Viconics VT76x7 series Terminal Equipment Controllers are designed for stand-alone (Network Ready) operation. They can be fully integrated into your choice of automation systems using the available communication adapter options. If required, stand-alone (Network Ready) Terminal Equipment Controllers can be field retrofitted with the following communication adapters: o VCM7607V5000B, Terminal Equipment Controller BACnet™ MS-TP® communication adapter o VCM7607V5000E, Terminal Equipment Controller Echelon™ LonTalk® communication adapter o VCM7000V5000W Terminal Equipment Controller wireless Zigbee™ communication adapter T ERMINAL , I DENTIFICATION AND F UNCTION Wiring Part Number VT7657B5x00(X) VT7607B5x00(X) Schedule Yes No Top left terminal block Y2 X X Y1 X X G X X RC X X C X X Top right terminal block RH X X W1 X X W2 X X Bottom terminal block HUM X X AUX X X DEHUM X X DI X X HS X X SCOM X X OS X X HL X X 7 | PIR Ready VT76x7 Series-Installation Guide Screw terminal arrangement Wiring notes: Note 1: If the same power source is used for the heating stages, install jumper across RC & RH. Maximum current is 2.0 amps. Note 2: If auxiliary output is used to toggle occupancy of the electronic control card inside the equipment, configure the relay parameter (Aux cont ) to the N.O. setting. A second relay can be added for additional functionality of the occupancy output. Note 3: Humidifier output uses a half bridge rectifier. Reference of the control signal is the common of the power supply of the Terminal Equipment Controller. (Terminal C) Note 4: Electromechanical contacts are to be used with the digital inputs. Electronic triacs cannot be used as mean of switching for the input. The switched leg to the input for the input to activate is terminal C (common) Note 5: The transformer of the unit provides power to the t Terminal Equipment Controller and the additional loads that will be wired to the Terminal Equipment Controller. HM AU DH DI HS Scom OS HL Y2 Y1 G RC C RH W1 5 pole left top connector 3 pole left top connector 8 pole bottom connector W2 8 | PIR Ready VT76x7 Series-Installation Guide T YPICAL APPLICATIONS 9 | PIR Ready VT76x7 Series-Installation Guide Remote humidity sensor accessories Model no. Description VH2020W1000 Wall mounted humidity sensor VH2020D10000 Duct mounted humidity sensor VH2020W1000, remote wall mounted room humidity sensor. This sensor can be used for: Remote return or room air humidity sensing with the sensor mounted on the wall. VH2020W1000 VH2020D1000, remote duct mounted humidity sensor c/w junction box. This sensor can be used for: Remote return air humidity sensing with the sensor mounted on the return air duct. Supply air humidity sensor used as high limit protection VH2020W1000 Wiring example of remote room humidity sensor: Wiring example of duct humidity sensor: Next >