The RLV431 thermostat can be used to control an electric heating system such as a baseboard heater, a radiant floor, a radiant ceiling, a convector, a fan-forced heater, etc.
The thermostat cannot be used with the following:
SUPPLIED PARTS
NOTE:
To access the programming keypad, remove the cover by placing your fingers to the right edge of the thermostat and pulling it.
Display
TURN OFF POWER TO THE HEATING SYSTEM AT THE MAIN POWER PANEL TO AVOID ELECTRICAL SHOCK.
The thermostat normally displays the room (measured) temperature.
The factory settings are indicated inside the gray cells of the following table.
Temperature display | °C | °F |
Time display | 24 h | 12 h |
Temperature control | Proportional (15-second cycles) | Conventional (± 0.5°C deadband) |
WARNING: The clock loses its setting whenever you change the thermostat’s configuration.
Temperature display
To change the temperature display between °C and °F:
Time display
Control type
Use proportional control (default setting) in most cases as it provides better temperature control. However, you must use conventional control if you have a fan-forced heater.
The fan is displayed when conventional control is selected. To switch between the two types of control:
The clock must be set when Time flashes on the screen.
The thermostat has three modes of operation:
Automatic (programmable) mode
To use the Automatic mode, press the Mode button until Auto is selected (outlined) on the screen. The current period number will appear.
In this mode, the thermostat automatically adjusts its temperature setpoint according to the period of the day(wake up, leave for work, return home and sleep).
You can program up to 4 periods in a day. You can set up 2 different programs: one for the weekdays (Monday to Friday) and another one for the weekend (Saturday and Sunday).
The thermostat is pre-programmed with the following schedule:
Period | Monday to Friday | Saturday & Sunday | |||
Start Time | Temperature | Start Time | Temperature | ||
1 | Wake | 6:00 | 21°C (70°F) | 6:00 | 21°C (70°F) |
2 | Leave | 8:00 | 16°C (62°F) | — | — |
3 | Return | 18:00 | 21°C (70°F) | — | — |
4 | Sleep | 22:00 | 16°C (62°F) | 22:00 | 16°C (62°F) |
To temporarily override the current setpoint, set the desired temperature using the Up or Down button. The new setpoint will be used until the beginning of the next period.
To modify the schedule:
Weekdays | Weekend | ||||||
MO TU WE TH FR | SA SU | ||||||
1 | 2 | 3 | 4 | 1 | 2 | 3 | 4 |
Manual (hold) mode
To use the Manual mode, press the Mode button until Man is selected (outlined) on the screen. Set the desired temperature using the Up or Down button. In this mode, any modification to the temperature setpoint must be done manually.
Economy mode
To use the Economy mode, press the Mode button until Econo is selected (outlined) on the screen. This mode is ideal for weekend residences as it can be used as follows: The temperature is kept at an economy level during most of your absence and is raised to a comfortable level by your usual arrival time. If you do not show up, the temperature will return to the economic level until next weekend.
The economy mode has two periods which should be set as follows:
Period | Temperature Setting | Start Time Setting |
1 | Set to a comfortable level. | Set the day and time that you want the temperature to start rising so that a comfortable level is attained by the time you arrive. |
2 | Set to an economy level. | Set the day and time that you want the temperature to start dropping to an economy level if you do not show up. |
The economy mode should be used as follows:
To program the two periods of the economy mode:
WARNING: When the thermostat is reset, all parameters (clock, configuration and schedules) return to their default settings.
During a power outage, the thermostat display remains lit for approximately the next 15 minutes during which the LP (low power) indicator appears. The settings are stored in memory. However, if the power failure exceeds 5 hours, only the thermostat’s clock must be re-adjusted. When power returns, the thermostat returns to the mode of operation preceding the power outage.
PROBLEM | SOLUTIONS |
Thermostat’s housing is hot. | This is normal. When the thermostat is running at full capacity, its housing can reach 40 °C (104 °F). |
Correct if any the following conditions applies: | |
Wrong temperature is displayed. | • The thermostat is exposed to an air draft. • The sticker on the thermostat’s screen has not been removed. |
• The thermostat is located near or above a heat source such as a light dimmer. | |
Wrong time is dis- played. | The thermostat was without power for more than 5 hours. |
• Ensure the thermostat is in Auto- matic mode. | |
Temperature does not change according to the programmed schedule. | • Check the clock and the schedule. If the thermostat is configured for 12-hour format, ensure that PM appears on the screen when after- noon times are displayed. |
LP reappears on the screen and disappears after a few minutes. | The thermal protection device on the heater has temporarily opened. This can happen if the heater is obstructed by furniture or curtain and has over- heated, or if the heater’s thermal pro- tection device is too sensitive. |
Display looks faded when heating is acti- vated. | The load of the heating system is prob- ably less than the required minimum. This thermostat cannot be used for loads below that rating. |
Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and ser- vice, for one (1) year from the date of purchase by the consumer. If at any time during the warranty period the product is determined to be defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option). If the product is defective,
This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage that occurred while the product was in the possession of a consumer.
Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states do not allow the exclusion or limitation of incidental or consequential damages, so this limitation may not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES,
INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE-YEAR DURATION OF THIS WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
This warranty gives you specific legal rights, and you may have other rights which vary from state to state.
If you have any questions concerning this warranty, please write Hon- eywell Customer Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-1502. In Canada, write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V429.
Customer Assistance
If you have any questions about the operation of your thermostat, please go to http://yourhome.honeywell.com, or call Honeywell
Customer Care is toll-free at 1-800-468-1502.
ENERGY STAR
As an ENERGY STAR® partner, Honeywell has determined that this product meets the ENERGY STAR guidelines for energy efficiency.
Download Manual
Honeywell RLV431 Programmable Thermostat User Guide
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