T29MTW

Modbus Thermostat for Commercial FCU & DX Unit Control

Get a quote

Dual System Compatibility: FCU & DX Unit Control

Modbus RTU for BMS Integration

Large Color Touch Display

Up to 2-Stage Heating/Cooling

Hotel Energy Saving: Key Card/Window Sensor

Flexible Power Input: 24VAC or 100-240VAC

Commercial Modbus FCU Thermostat – Front View

Commercial Modbus FCU Thermostat – Left Side View

Commercial Modbus FCU Thermostat – Right Side View

Home Product Commercial Thermostats DX Unit Thermostats

Product Description

The Saswell T29MTW Modbus thermostat is a versatile commercial controller engineered for superior comfort and energy management in large-scale installations. Designed to operate both Fan Coil Units (FCU) and multi-stage Direct Expansion (DX) Units with 2-stage heating/cooling capability, the T29MTW features Modbus RTU communication for seamless integration with any Building Management System (BMS). Its large color touch screen ensures intuitive local control. Dedicated inputs for key cards and window sensors deliver significant hotel energy savings in hospitality environments. Supporting 2-pipe and 4-pipe systems with precise 0.1°C accuracy, and compatible with both 24VAC and 100-240VAC power, the T29MTW is the reliable choice for modern smart buildings.

Key Functions

Centralized BMS Control

Full Modbus RTU integration for remote monitoring, setpoint adjustment, and diagnostics via a central Building Management System.
Multi-Mode Compatibility

Single device controls 2/4 pipe FCU, 3-speed fan, and up to 2-stage Heating/Cooling on DX systems.
Precision Temperature Sensing

High-accuracy sensor providing 0.1°C control resolution, ensuring optimal zone comfort.

Integrated Energy Savings

Dedicated Room Card and Window Sensor inputs automatically enter energy-saving mode when the room is vacant or a window is open.
Wide Voltage Flexibility

Designed to accept both 24VAC and 100-240VAC power supplies for global project deployment.
Programmable Scheduling

Allows end-users or facility managers to set customizable, time-based temperature programs for optimized occupancy control.

Product Selector

Model No.

Heat/cool

Cool only

Pipe

Speed fan

Programmable

Window card

Room card

External Sensor

Modbus RTU

WIFI

Power

Manual

T29MTW-7-S-485

√

2/4

1/3

√

220/24VAC

download

Product Parameters

Power Supply: 100-240VAC 50/60Hz；24(18~30) VAC 50/60Hz
Realy for fan: 8(5)A
Standby current: <1W
Heat/Cool Relay Amps inductive: 3(2)A
Temperature setting range: 0°C to 50°C
Accuracy: 0.1°C
Storage temperature: -10°C to 60°C
Operation temperature: 0°C to 50°C
Dimensions: 135mm×92mm×27.5mm

Product Dimensions

Product Installation

Product Application Scenarios

The T29MTW is ideal for commercial, hospitality, and residential projects requiring precise climate control and centralized management. Key applications include luxury hotels, large corporate offices, shopping malls, government buildings, and other multi-zone facilities where integration into a Building Management System (BMS) via Modbus is a mandatory requirement for efficiency and unified operation.

Shopping Malls

Office-Building

luxury hotels

Partnership & OEM/ODM Support

Saswell is committed to supporting our global partners with high-quality HVAC control solutions, backed by superior engineering and responsive service. We empower your success from product concept to final installation and beyond.

Rapid Customization

Leverage our fast-customization capabilities for OEM/ODM requirements, allowing quick market entry with your unique branding and specific features.
Dedicated Technical Support

Access our expert technical team for seamless integration, troubleshooting, and application advice, ensuring smooth project deployment worldwide.
Global After-Sales Service

Benefit from comprehensive warranty and after-sales support designed to minimize downtime and maintain long-term product performance and customer satisfaction.