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A3263 Boiler Thermostat

The A3263 is a programmable boiler thermostat suitable for gas, oil, electric boiler, and wall-hung boiler control.

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 Description Specifications Wiring Diagram Application

 Description

 

The A3263 Boiler Thermostat is a programmable boiler thermostat designed for the control of gas boilers, oil boilers, electric boilers, and wall-hung boilers. As a dedicated heating appliance controller, it manages a single heating appliance with flexible scheduling to improve comfort and save energy.

 

Powered by 2 × AA alkaline batteries, the A3263 is a battery-powered thermostat that is easy to install via surface mounting without complex wiring. It supports a 7-day or 5+2-day, 4-period programmable schedule, an adjustable dead band (0.5°C / 1°C / 1.5°C), °F/°C selectable display, 12/24-hour clock, an override function, and a green backlight with low-battery warning. For broader HVAC control needs, compare it with the Versatile D Series or HA209 Series.

 

Key Features 

 

7-Day / 5+2-Day, 4-Period Programming

A flexible programmable schedule — choose 7-day or 5+2-day mode with up to 4 periods per day to match real occupancy and cut standby heating costs.

 

Single Heating Appliance Control

Designed to control a single heating appliance such as a gas, oil, electric or wall-hung boiler with a 220VAC / 5A switching load.

 

12h / 24h Clock Selectable

Set the clock format to 12-hour or 24-hour according to local preference.

 

Override Function

The override function lets you make a temporary temperature or mode change without altering the saved program.

 

Adjustable Dead Band

The dead band is adjustable at 0.5°C, 1°C or 1.5°C, helping reduce boiler short-cycling and extend equipment life.

 

Battery Powered & Low-Battery Warning

Runs on 2 × 1.5V (AA) alkaline batteries with a low-battery warning that alerts you before power runs out.

 

°F / °C Selectable

Switch the display between °F and °C for regional or user preference.

 

Green Backlight

A green backlight display ensures clear reading of settings in low-light conditions.

Specifications

    Temperature Setting Range: 45° F and 95° F (7°C and 35°C )

    Operating Ambient Temperature: 32° F-99° F (0°C and 37°C)
    Load: 220VAC(5A)
    Power Supply: 2 AA batteries
    Mounting: Surface Mounting

Wiring Diagram

Surface Mounting

The A3263 uses surface mounting for quick, tool-light installation — no flush-box required. Refer to the official wiring diagram for terminal connections.

 

Single-Appliance Switching

It switches a 220VAC / 5A load to control one heating appliance (gas, oil, electric or wall-hung boiler). Follow the model-specific wiring diagram and local electrical codes.



Applications

 

The A3263 Boiler Thermostat fits a wide range of boiler heating control scenarios:

 

 

See proven deployments such as the EBA Building Automation at Zhongguancun Science City and the Qinhuangdao Bovi Fortune Center thermal-storage project.

 

Why Choose Hailin Controls

 

Hailin Controls is an experienced HVAC control manufacturer with internationally recognized certifications and a full portfolio of thermostats, sensors, gateways and building-management platforms. The A3263 Boiler Thermostat reflects Hailin's commitment to reliable, energy-efficient and easy-to-deploy control solutions backed by professional services.

 

Frequently Asked Questions

 

What boiler types is the A3263 Boiler Thermostat compatible with?

It is suitable for gas boilers, oil boilers, electric boilers and wall-hung (combi) boilers, controlling a single heating appliance.

 

What is the power supply and battery indication?

It is powered by 2 × 1.5V (AA) alkaline batteries and includes a low-battery warning so you are alerted before the batteries run out.

 

How is the thermostat mounted and what is the load rating?

It uses surface mounting and switches a load of 220VAC at 5A, suitable for controlling a single heating appliance.

 

Can the dead band and clock format be adjusted?

Yes. The dead band is adjustable at 0.5°C, 1°C or 1.5°C, the clock can be 12-hour or 24-hour, and an override function allows temporary changes.

APPLICATION

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