SEZ7656R1045B / SEZ7656H1045B Installation Guide for BACnet™ MS-TP RTU / HP Room Controllers For Commercial Zoning Systems CONTENTS Installation Location Installation BACnet™ System Overview Terminal, Identification and Function Wiring Screw terminal arrangement and wiring Typical Applications Main outputs wiring Configuring and Status Display Instructions User interface 2 2 2 3 4 4 4 5 5 7 9
INSTALLATION Remove security screw on bottom of cover. • Open unit by pulling on bottom side of Room Controller (Figure 1). • Remove wiring terminals from sticker. • Read FCC ID and IC label installed in the cover. Location 1. Should not be installed on outside wall. 2. Must be installed away from any direct heat source. 3. Should not be installed near air discharge grill. 4. Should not be affected by direct sun radiation. 5. Nothing should restrict vertical air circulation to Room Controller.
BACNET™ SYSTEM OVERVIEW Schneider Electric SEZ7260X5x45B Zone controllers are used in conjunction with the SEZ7656x1045B roof top controllers. Combined, they are designed for operating typical; single or multistage RTU’s and their associated local zones. For example, a typical job layout system may feature 3 RTU controllers and a total of 31 zones. This would bring to total number of nodes (individual Com addresses) to 34.
TERMINAL, IDENTIFICATION AND FUNCTION Wiring Screw terminal arrangement and wiring Terminal Use Rooftop 1 – Cool 2 2 – Cool 1 Heat Pump Compressor 2 Compressor 1 Terminal Identification RTU HP 3 - Fan Output for cooling / compressor stage number 2 Y1 Output for cooling / compressor stage number 1 G Output for the fan RC 5 - 0 V ~ Hot C W1 7 – Heat 1 8- Heat 2 Power supply of controller, hot side (Delivered from the RTU). Power supply of controller, common side.
TYPICAL APPLICATIONS Digital Input Jumper Y2 Y1 Cool Stage 2 G RC C RH W1 W2 Heat Stage 1 Fan BPD Aux SP 0-10 VDC Bypass Damper Actuator Auxiliary Output 0-5 VDC Static Pressure Transducer 24V Com Cool Stage 1 DH RS Scom OS DS Discharge Air Sensor 24V Com Heat Stage 2 Remote Room Sensor Outdoor Sensor 24 VAC Thermostat internal contacts Dry Contact System wiring Transformer Main outputs wiring Wiring notes: Note 1 If the same power source is used for the heating stages, in
Temperature vs. Resistance Chart for 10K Type 2 NTC Thermistor (R 25°C = 10KΩ±3% - B 25/85°C = 3975K±1.5%) 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.
CONFIGURING AND STATUS DISPLAY INSTRUCTIONS Status display The Room Controller features a two-line, eight-character display. There is a low backlight level that is always active and can only be seen at night. When left unattended, the Room 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 lighting to come on to high level.
Sequence of manual-scroll status display: Manual scroll 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. CLOCK STATUS SYSTEM MODE Monday Sys Mode 12:00 AM Off Sys Mode Auto Sys Mode Cool SCHEDULE STATUS ALARMS (if detected) When any of the fan speeds are ON, the FAN LED will illuminate.
USER INTERFACE User configuring instructions menu The SEZ7656X series of controllers feature an intuitive, menu-driven, backlit LCD display that walks users and installers through the configuring steps, making the configuring process extremely simple. This menu is typically accessed by the user to set the parameters such as the clock time set, the schedule time events and the system mode. It is possible to bring up the user menu at any time by depressing the MENU key.
