HONEYWELL T775A/B/M Series 2000 Electronic Stand-Alone Controllers

HONEYWELL T775A/B/M Series 2000  Electronic Stand-Alone  Controllers

PRODUCT DESCRIPTION

The T775 electronic stand-alone controllers are the next generation of commercial and agricultural controls capable of remote sensing of temperature and providing switched and/or proportional outputs to various types of loads. Five models have analog (modulating) outputs for actuator and motor control, and NEMA-4 weatherproof enclosures are available for wet environments.

Temperature Sensors

The controller accepts 1,097 Ohms PTC at 77°F (25°C): 

• 50021579-001 – Standard sensor (included with all models except NEMA 4X models) 

• T775-SENS-STRAP– Strap on sensor with wiring box 

• T775-SENS-WR – Water resistant with 5 foot leads (included with NEMA 4X models) 

• T775-SENS-WT – Watertight with 6 foot lead 

• T775-SENS-OAT – Outdoor air temperature sensor 

• C7031B2005 – 6 inch duct mount with wiring box 

• C7031D2003 – 5 inch immersion sensor with wiring box (use immersion well; P/N 50001774-001) 

• C7031J2009 – 12 foot duct averaging sensor with wiring box 

• C7046D1008 – 8 inch duct probe with mounting flange 

• C7100D1001 – 12 inch fast response, duct averaging sensor with flange 

• C7130B1009 – Room mount sensor

Product Changes

Below are the changes to T775A/B/M models starting with Series 3 (March 2009). Series 3 can be identified by the sideways 3 after the part number on the device label. 

1. Modulating high and low limit now both function in either the heat or the cool mode. 

2. MIN ON added. 

3. SYNC added. 

4. Differential and throttling range increased to 300°F. 

5. Setpoint and Enable options added to the DI options. 

6. HIDE option added to MOD1 and MOD2 (to hide them on the home screen).

When Installing This Product 

1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. 

2. Check ratings given in instructions and on the product to ensure the product is suitable for your application. 

3. Installer must be a trained, experienced service technician. 

4. After installation is complete, check out product operation as provided in these instructions.

Instructions and warnings related to the operation of the product:

The following specifications must be strictly observed:

 The technical specifications and typical applications of the product system must be strictly observed.

 PERSONNEL TRAINING: Only trained personnel may install, operate, maintain or repair the product system. These personnel must be instructed on the

These personnel must be instructed and briefed on the conditions in the hazardous area.

 Unauthorised modifications: No modifications or structural changes may be made to the product system.

 Maintenance Responsibility: It must be ensured that the product system is only used under appropriate conditions and in a condition that is fully fit for purpose.

 Working environment: The user must fulfil the specified environmental conditions:

Safety regulations

The following safety regulations must be fully observed when (maintenance) work is carried out on the product system:

1 Disconnect completely.

2 Secure to prevent reconnection.

3 Confirm that the installation has been completed.

4 Perform grounding and short-circuiting.