Overview
The W7750A, B, C are LonMark® compliant Constant Volume Air Handling Unit Controllers used to control single zone and heat pump air handlers.
Features
- High side triac switching (B and C only).
- Freezestat protection for HVAC equipment (B and C only).
- Analog outputs (C only).
- Factory configured via EEPROM with critical user parameter default values.
- Uses LonTalk® network (E-Bus) communications protocol.
- High-speed 78 kilobit communications network.
- Conforms with Echelon® LonMark® HVAC Interoperability standard for Roof Top Unit controllers (profile number 8030).
- Free Topology Transceiver (FTT) network technology is insensitive to polarity, simplifying installation.
- Capable of stand-alone operation and has enhanced features available when using the E-Bus network communications.
- Designed for both staged heating/cooling control and modulating heating/cooling control.
- Uses either Series 60 Floating Control or PWM (W7750B only) providing modulating control for heating/cooling equipment.
- Supports two types of economizer control: modulating control and enable/disable control.
- Provides Proportional Integral Derivative (PID) temperature control.
- Uses an adaptive algorithm (patent pending) that continuously adjusts the discharge air setpoint as needed (W7750B only).
- Motion sensor interface for enhanced energy savings.
- Window sensor input for additional energy savings.
Product Specifications
- Application
- Packaged RTU; Conventional or Heat Pump Systems
- Dimensions (in.)
- 5 5/8 in. high x 6 in. wide x 2 1/8 in. deep
- Dimensions (mm)
- 143 mm high x 152 mm wide x 54 mm deep
- Used With
- See Application Selection Guide (63-7046)
- Frequency
- 50 Hz; 60 Hz
- Approvals, Underwriters Laboratories Inc.
- UL 916 (E7741) and cUL (E87741)
- Operating Humidity Range (% RH)
- 5 to 95% RH, non-condensing
- Application Size
- 2 Heat / 2 Cool
- I/O Count
- 6 Digital Outputs (relay), 3 Analog Inputs, 3 Digital Inputs
- Output Type
- Staged On/Off, Floating, Pulse Width Modulation
- Contact Ratings
- 1.5 A Run @ 24 Vac; 7.5 A inrush @ 24 Vac
- Power Consumption
- 6 VA
- Voltage
- 24 Vac
- Setpoint Temperature Range (C)
- 7 C to 37 C
- Setpoint Temperature Range (F)
- 45 F to 99 F
- Operating Temperature Range (F)
- -40 F to +150 F
- Operating Temperature Range (C)
- -40 C to +66 C
- Shipping and Storage Temperature Range (F)
- -40 F to +150 F
- Shipping and Storage Temperature Range (C)
- -40 C to +65 C
- Network Communications
- LonWorks Bus
- Commissioning Software
- CARE; LonSpec; RapidZone; LNS Plug-in
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