Before Installation, Installation and Setup

BEFORE INSTALLATION

Review the “Specifications” on page 35 before installing the controller.

When Installing This Product

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

2.Check ratings given in instructions and on the prod- uct to ensure the product is suitable for your appli- cation.

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

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

INSTALLATION AND SETUP

The following installation procedures are typically performed in the order listed:

1.Mounting — see “Mounting” below.

2.Wiring — see “Wiring” on this page.

3.Checkout — see page 10.

4.Programming — see page 13.

5.Scheduling (optional) — see page 30.

Additional topics are:

•Temperature sensor calibration begins on page 10.

•Interface overview begins on page 11.

•Setup (for advanced options) begins on page 17.

•Summary menu begins on page 34.

•Troubleshooting begins on page 34.

MOUNTING

This section describes the mounting procedures for the controller and temperature sensor(s).

Controller Mounting

IMPORTANT

Avoid mounting in areas where acid fumes or other deteriorating vapors can attack the metal parts of the controller circuit board, or in areas where escaping gas or other explosive vapors are present.

IMPORTANT

The controller must be mounted in a position that allows clearance for wiring, servicing, and removal.

Use a screwdriver to pry out only the knockouts that you will use.

If mounting on DIN rail, be sure to remove the knockouts before mounting. See “Controller Wiring” on page 5 and Fig. 7 on page 6 for recommended knockout usage and locations. If you do not use an opened knockout be sure to cover it.

Mount the controller on any convenient interior location using the four mounting holes provided on the back of the enclosure using #6 or #8 screws (screws are not provided and must be obtained separately). Use controller dimensions in Fig. 1 on page 2 as a guide.

T775A/B/M SERIES 2000 CONTROLLER

The controller may be mounted in any orientation. However, mounting in the orientation shown in Fig. 1 permits proper viewing of the LCD display and use of the keypad.

NEMA 4 Enclosure Mounting

For models with NEMA 4 enclosures, ensure that waterproof wire/conduit fittings are used at the knockouts for all wiring attachments. See Fig. 7 on page 6 for knockout locations.

IMPORTANT

For NEMA 4 enclosures, be sure to cover and seal all unused open knockouts.

Temperature Sensor(s) Mounting and Location

Temperature sensors may be located up to 1,000 feet (304 m) from the T775A/B/M controller. See Table 3 on page 10 for calibration guidelines.

The sensors may be mounted on a wall or panel for sensing space temperature, strapped to a pipe or inserted in an immersion well (see Fig. 2) for hot or cold water sensing, or taped to a standard cap or bulb holder for duct air sensing. To prevent moisture or condensation entering the sensor through the lead wire holes, mount the sensor with the lead wires exiting the bottom of the sensor.

NOTES:

1.The included sensor is not designed for very wet applications. For immersion applications, an immersion well is used.

2.Heat conductive compound must be used in immersion wells.

3.See “Temperature Sensors” on page 2 for this type of installation.

SENSOR	USE HEAT
PLACED	CONDUCTIVE
IN WELL	COMPOUND

1/2 NPT	IMMERSION
	WELL
	M24470

Fig. 2. Sensor inserted in immersion well.

NOTE: Multiple sensors may be parallel-series wired to sense average temperatures in large spaces. See Fig. 3 on page 4.

WIRING

All wiring must comply with applicable electrical codes and ordinances, or as specified on installation wiring diagrams. Controller wiring is terminated to the screw terminal blocks located inside the device.

The remainder of this section describes the temperature sensor wiring and the T775A/B/M controller wiring.

3	62-0254–03

AC-220-7, AC-140-7 specifications

The Honeywell AC-140-7 and AC-220-7 are advanced air conditioning units that exemplify modern air conditioning technology, delivering both comfort and efficiency. Designed for varying space requirements, these units cater to both residential and light commercial settings, providing versatile solutions for climate control.

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Honeywell AC-140-7, AC-220-7 manual Before Installation, Installation and Setup, Mounting, Wiring

Models: AC-220-7 AC-140-7