Four-Stage Sequencer (24V)

Electronic four-step sequence controller operates up to four external AC power handling relays or loads in heating, ventilating and air conditioning systems. A second unit can be sequenced to provide up to eight steps.

Features

• Stages individually adjustable.
• Large selection of operational differentials available.
• Uses standard track mounting.
• Can accommodate two individual inputs.

Specifications

• Construction: Self-contained package with an amplifier.
• Sensors: Balco, 1000 ohm, requires remote setpoint adjustor (except TS-8111) AT-8100 series (order separately). Slidewire, 135 ohm.
• Input Signals: 6 to 9 Vdc or11 to 14 Vdc from a controller.
• Power Demand Override: Contact closure or proportional 2 to 15 Vdc control signal.
• Throttling Range: 3 or 6°F (2 or 3°C), 9°F (5°C) can be obtained by the use of AD-8969-901 (order separately). Additional ranges obtainable through selection of resistors (not included).
• Staged Sequencing: 35 second time delay between stages and return to cold start on power interruption. For electrical ratings see Table 1.
• Control Output Voltage: 2 to 15 Vdc is available for sequencing up to two TAC System 8000 controlled devices. Action: Factory set for R.A. (reverse acting), but can be made D.A. (direct acting).
• Power Requirements: 24 Vac 50/60 Hz @ 13 VA plus VA of each stage, maximum 100 VA.
• Power Supplies Available: 6.2 ±.4 Vdc, 7 mA. 20 -1.5, +1 Vdc, 50 mA.
• Operating 40 to 125°F (4 to 52°C).
• Humidity: 5 to 95% RH, non-condensing. Locations, NEMA Type 1 indoor only.
• Connections: Coded screw terminals for 16 to 20 gauge wire.
• Cover: Aluminum
• Mounting: In any position. Printed circuit board is mounted to a section of track for panel installation.
• Dimensions: 4" high × 9-1/2" wide × 2-1/2" deep (102 mm × 241 mm × 63 mm).