RS PRO 908WHB-3 - User Manual

1
908WHB-3/B is a programmable thermostat designed for water boiler and electric furnace
application. This thermostat can be used for hot water radiant heating and electric cable heating
system.
SPECIFICATION:
Power source …………………… 2 AA size 1.5V alkaline battery
Maximum resistive load……………… 230VAC 5A
Maximum inductive load………………230VAC 2A
Relay contact …………………………230VAC 8A
Room temperature setting range………5℃ to 35℃ (41℉ to 95℉)
Accuracy……………………………. ±1℉ or ±0.5℃
Dimensions………………………… 115mm×90mm×16mm
Color……………………………….. White
FEATURE:
z Large LCD display
z The screen displays the set temperature and the room temperature also time simultaneously
z Permanent user setting and program setting retention during power loss,
z Optional temperature display of Celsius or Fahrenheit scale
z Both Vacation mold and hold duration mode available for comfort and energy saving
z Separate 5-day (weekday) and 1-day/1-day (Saturday/Sunday programming with four separate
time/temperature periods per day.
z Display temperature recalibrates
z Anti-freezing protection
z Pump protection available
IMPORTANT SAFETY INFORMATION:
z Always turn off power at the main power source by unscrewing fuse or switching circuit
breaker to the off position before installing, removing, cleaning, or servicing this thermostat.
z Read all of the information in this manual before installing this thermostat.
z Only a professional contractor should install this thermostat.
z All wiring must conform to local and national building and electrical codes and ordinances.
z This thermostat has a removable fuse to protect the system from damage. If system is not
operating properly, check wiring and replace fuse if necessary.
z Use this thermostat only as described in this manual.
KEYBOARD, DISPLAY AND SWITCH DESCRIOPTION
SAS908WHB-3/B Thermostat for Radiant heating
Installation and operation instructions

Summary

Specifications and Features

Specifications

Details technical specifications like power, load, range, dimensions, and color.

Features

Lists key features of the thermostat including display, settings, and protection modes.

Important Safety Information

Keyboard, Display and Switch Description

Install the Thermostat

Attach Thermostat Base to Wall

Details the physical process of mounting the thermostat base to the wall.

Wiring Diagram

Illustrates the electrical connections for the thermostat's relay and pump/valve.

Check Thermostat Operation

Explains how to verify the thermostat's basic heating control functionality.

Operation

Configuration Menu

Guides on setting thermostat operating characteristics, system compatibility, and personal preferences.

Temperature Recalibrates

Allows adjustment of room temperature display up or down by 3 degrees.

Maximum Temperature Set Point

Sets the upper limit for heating temperature, adjustable from 18°C to 35°C.

Minimum Temperature Set Point

Sets the lower limit for heating temperature, adjustable from 5°C to 20°C.

Manual Operation

Anti-freezing Mode

Activates a mode to protect against freezing, displaying only clock time and temperatures.

Program Operation and Hold Temperature

Switch between preset program schedules or maintain a specific temperature.

Temperature Override

Temporarily change the set temperature until the next scheduled program period.

Vacation Temperature Hold

Set a specific temperature for extended periods like vacations (1-99 days).

Set Current Day and Time

Planning Your Program

Heating Schedule Plan

Details the factory default heating times and temperatures for weekdays, Saturday, and Sunday.

Enter Heating Program

Step-by-step guide to manually set heating times and temperatures for each period.

Revert to Factory Default Program Setting

Check Your Programming

Customer Assistance

RS PRO 908WHB-3 Specifications

General

Brand	RS PRO
Model	908WHB-3
Category	Thermostat
Language	English