1 | PIR Ready VT7600 Series-Installation Guide CONTENTS Installation 2 Location 2 Installation 2 Theory of Operation 3 Features overview 4 Model Chart 5 Network ready 5 Terminal, Identification and Function 6 Screw terminal arrangement and wiring 6 Typical Applications 7 Main outputs wiring 7 Remote sensor accessories 8 Configuring and Status Display Instructions 9 Status display 9 User interface 11 User configuring instructions menu 11 Local keypad interface 11 Discharge Air Control 27 Specifications 28 Drawing & Dimensions 29 VT7600F Series RTU Terminal Equipment Controller with Modulating Heat Installation Guide For Commercial HVAC Applications January 30th, 2012 / 028-377-R2 2 | PIR Ready VT7600 Series-Installation Guide INSTALLATION 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 base in the proper orientation. Arrow on base should be facing 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. 3 | PIR Ready VT7600 Series-Installation Guide 10. Insert each wire according to wiring diagram. 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. THEORY OF OPERATION The VT76X6F series uses a Viconics proprietary adaptive logic algorithm to control the space temperature. This algorithm controls the heating and or 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 thermostats. Fig.2 - On/Off mechanical control vs. PI electronic control.  When 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 improper 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 or installer or 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 VT7600 Series-Installation Guide Features overview  7 day schedule models, 2 or 4 events.  Remote outdoor sensing capability for added flexibility. - System mode heating and cooling lockout. -  Remote discharge air sensor input for monitoring and control purpose. - System efficiency feedback. - Discharge high limit heating lockout. - Discharge low limit cooling lockout. - Minimum supply air temperature.  Remote return air sensor input that replaces internal on board sensor.  Password protected configuration menu and lockable keypads for security.  Two 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 monitors filters.  RemNSB: 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.  Automatic smart fan operation saves energy during unoccupied periods.  Non volatile EEPROM memory prevents loss of parameters during power shortage.  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. Easy configuration and self-binding operation  Easy configuration without using any special software or additional tools.  Can be used as stand-alone or with BACnet™ MS-TP supervision controller for monitoring purposed.  Truly scalable in terms of supported number of zones and RTU units. 5 | PIR Ready VT7600 Series-Installation Guide MODEL CHART Network ready  All Viconics VT7600 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 VCM7600N5000B, Terminal Equipment Controller BACnet™ MS-TP® communication adapter o VCM7600N5000W Terminal Equipment Controller wireless Zigbee™ communication adapter 6 | PIR Ready VT7600 Series-Installation Guide TERMINAL, IDENTIFICATION AND FUNCTION Terminal Use Terminal Identification Description 1 – Y2 2nd cooling Y2 Second cooling stage output. 2 – Y1 1st cool Y1 First cooling stage output. 3 – G Fan G Fan output. 4 – RC 24VAC hot RC Power supply of thermostat, hot side. 5 – C 24VAC com C Power supply of thermostat, common side. 9 – AO analog heat AO Analog 0 – 10 VDC heating output. 10 – Auxiliary output AUX Auxiliary output used to disable economizer minimum position or control lighting during unoccupied periods. 11 – DI 1 DI 1 Configurable extra digital input. See parameter section for more information. 12 – DI 2 DI 2 Configurable extra digital input. See parameter section for more information. 13 – RS RS Remote temperature sensor input. 14 - Scom Scom Reference input for DI 1, RS, OS & DS. 15 - OS OS Outside air temperature sensor input. 16 - DS MS Discharge air temperature sensor input. Screw terminal arrangement and wiring AuxDI1DI2 RS SCom OS MS G Y1 Y2 C RC VT76XXF Controller Terminals AO 7 | PIR Ready VT7600 Series-Installation Guide TYPICAL APPLICATIONS Main outputs wiring 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: The analog outputs and inputs use 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. 8 | PIR Ready VT7600 Series-Installation Guide Remote sensor accessories Model no. Description S2020E1000 Outdoor temperature sensor S2060A1000 Averaging temperature sensor S2000D1000 Duct mounted temperature sensor Remote mount temperature sensors use 10K NTC thermistor. Temperature vs. Resistance Chart for 10 Kohm NTC Thermistor (R25°C = 10K±3% - B25/85°C = 3975K±1.5%) S2000D1000; remote duct mounted temperature sensor c/w junction box. This sensor can be used for:  Remote return air temperature sensing with the sensor mounted on the return air duct.  Outside air temperature sensing with the sensor installed in the fresh air plenum.  Supply air temperature sensing. S2060A1000; remote averaging duct mounted temperature sensor c/w junction box. This sensor can be used for:  Remote averaging return air temperature sensing with the sensor mounted on the return air duct.  Outside air temperature averaging sensing with the sensor installed in the fresh air plenum. ºC ºF Kohm ºC ºF Kohm ºC ºF Kohm ºC ºF Kohm ºC ºF Kohm -40 -40 324.3197 -20 -4 94.5149 0 32 32.1910 20 68 12.4601 40 104 5.3467 -39 -38 303.6427 -19 -2 89.2521 1 34 30.6120 21 70 11.9177 41 106 5.1373 -38 -36 284.4189 -18 0 84.3147 2 36 29.1197 22 72 11.4018 42 108 4.9373 -37 -35 266.5373 -17 1 79.6808 3 37 27.7088 23 73 10.9112 43 109 4.7460 -36 -33 249.8958 -16 3 75.3299 4 39 26.3744 24 75 10.4443 44 111 4.5631 -35 -31 234.4009 -15 5 71.2430 5 41 25.1119 25 77 10.0000 45 113 4.3881 -34 -29 219.9666 -14 7 67.4028 6 43 23.9172 26 79 9.5754 46 115 4.2208 -33 -27 206.5140 -13 9 63.7928 7 45 22.7861 27 81 9.1711 47 117 4.0607 -32 -26 193.9703 -12 10 60.3980 8 46 21.7151 28 82 8.7860 48 118 3.9074 -31 -24 182.2686 -11 12 57.2044 9 48 20.7004 29 84 8.4190 49 120 3.7607 -30 -22 171.3474 -10 14 54.1988 10 50 19.7390 30 86 8.0694 50 122 3.6202 -29 -20 161.1499 -9 16 51.3692 11 52 18.8277 31 88 7.7360 51 124 3.4857 -28 -18 151.6239 -8 18 48.7042 12 54 17.9636 32 90 7.4182 52 126 3.3568 -27 -17 142.7211 -7 19 46.1933 13 55 17.1440 33 91 7.1150 53 127 3.2333 -26 -15 134.3971 -6 21 43.8268 14 57 16.3665 34 93 6.8259 54 129 3.1150 -25 -13 126.6109 -5 23 41.5956 15 59 15.6286 35 95 6.5499 55 131 3.0016 -24 -11 119.3244 -4 25 39.4921 16 61 14.9280 36 97 6.2866 56 133 2.8928 -23 -9 112.5028 -3 27 37.5056 17 63 14.2629 37 99 6.0351 57 135 2.7886 -22 -8 106.1135 -2 28 35.6316 18 64 13.6310 38 100 5.7950 58 136 2.6886 -21 -6 100.1268 -1 30 33.8622 19 66 13.0307 39 102 5.5657 59 138 2.5926 Fig.10 – Remote Duct Mounted Temperature Sensor 9 | PIR Ready VT7600 Series-Installation Guide  Supply air temperature averaging sensor for economizer models with the sensor in the mixing plenum. S2020E1000; outdoor air temperature sensor This sensor can be used for:  Outside air temperature sensing with the sensor installed directly exposed to the elements.  Sensor uses a water resistant NEMA 4 ABS enclosure for outdoor applications. WIRING S2000D1000, S2060A1000 and S2020E1000 Remote wiring 1 sensor Remote wiring 4 sensors CONFIGURING AND STATUS DISPLAY INSTRUCTIONS Status display The Terminal Equipment Controller features a two-line, eight-character display. There is a low level backlight that is always active and can only be seen at night. When left unattended, the Terminal Equipment Controller has an auto scrolling display that shows the current status of the system. Each item is scrolled sequentially with the back lighting in low level mode. Pressing any key will cause the back light to come on to high level. Manual scrolling of each menu item is achieved by pressing the Yes (scroll) key repetitively. The last item viewed will be shown on the display for 30 seconds before returning to automatic scrolling. Temperature is automatically updated when scrolling is held. Sequence of auto-scroll status display: CLOCK STATUS SYSTEM MODE SCHEDULE STATUS OUTDOOR TEMPERATURE ALARMS Monday 12:00 AM Sys mode auto Occupied Outdoor x.x °C or°F Service Sys mode off Occupied hold Frost ON Sys mode heat Unoccup SetClock Sys mode cool Filter Fan lock DAS Alrm 10 K 10 K 10 K 10 K 10 K Scom DS Scom OS Scom RS or or Scom DS Scom OS Scom RS or or Next >