Honeywell RLV450 t, u, v, w

RLV450 69-2201EF-03 2009-08-04 3/4

The schedule consists of 4 periods per day which represents a typi-

cal weekday. You can program the thermostat to skip the periods that

do not apply to your situation. For example, you can skip periods 2

and 3 for the weekend.

The Comfort ( ) temperature is used in periods 1 and 3 and the

Economy ( ) temperature is used in periods 2 and 4. For example,

when the period changes from 1 to 2, the setpoint automatically

changes from Comfort setting ( ) to Economy setting ( ).

You can have a different program for each day of the week; i.e., each

period can start at different time for each day of the week. The

thermostat has been programmed with the following schedule.

To modify the schedule:

nPress Pgm to access the programming mode. Period 1 is

selected.

oPress Day to select the day to program (hold for 3 seconds to

select the entire week).

pPress Hour and Min to set the start time of the selected period,

or press Clear if you want to skip the period (--:-- is displayed).

qPress Pgm to select another period, or press Day to select

another day. Then repeat step 3.

rPress Mode to exit the programming mode.

NOTE: If no button is pressed for 60 seconds, the thermostat will

automatically exit the programming mode.

During a power outage, LP (Low Power) appears for the first two min-

utes. Then the screen becomes blank. The settings are stored in

memory. However, if the power failure exceeds 4 hours, the thermo-

stat’s clock must be re-adjusted and, if you are using the automatic

Daylight Savings Time changeover function, it must be re-enabled.

When power returns, the thermostat will return to the mode of opera-

tion active prior to the power failure.

Power: 120/240 VAC, 60 Hz

Minimum load: 2 A (resistive only)

250 W @ 120 VAC

500 W @ 240 VAC

Maximum load: 16.7 A (resistive only)

2000 W @ 120 VAC

4000 W @ 240 VAC

Display range: 0°C to 60.0°C (32°F to 140°F)

Display resolution: 0.5°C (1°F)

Setpoint range: 5.0°C to 30.0°C (40°F to 86°F)

Setpoint interval: 0.5°C (1°F)

Storage: -20°C to 50°C (-4°F to 120°F)

Approval: c UL us

tSchedule 7.

Period Description Setting

Wake

Leave

Return

Sleep

Period Setting MO TU WE TH FR SA SU

6:00

8:00

AM --:-- --:--

6:00

PM --:-- --:--

10:00

uPower Outage 8.

vTroubleshooting 9.

PROBLEM SOLUTIONS

Thermostat is hot.

This condition is normal. Under normal

operation, the thermostat housing can

reach a temperature between 35°C (95°F)

and 40°C (104°F).

LO is displayed. The measured temperature is below the

display range. Heating is activated.

HI is displayed. The measured temperature is above the

display range.

Wrong temperature is

displayed.

The thermostat is exposed to air draft.

Eliminate the draft.

The sticker on the thermostat’s screen has

not been removed.

Wrong time is displayed. The thermostat was without power for

more than 4 hours.

Temperature does not

change according to the

programmed schedule.

Check that the thermostat is in Automatic

mode. Check the schedule and clock set-

tings.

LP appears on the

screen or the screen is

blank despite there is no

power outage.

The thermal circuit breaker in the heater is

opened. This can happen if the heater is

obstructed by furniture or curtain and has

overheated, or if the thermal circuit breaker

is defective.

Display looks faded

when heating is acti-

vated

The heating system is less than the

required minimum load. This thermostat

cannot be used below that rating.

The settings cannot be

changed. The settings are locked (see section 3).

wTechnical Specifications 10.

400-106-021-D_69-2201EF-03 (RLV450 Honeywell TH106B) ENG.fm Page 3 Tuesday, August 4, 2009 4:33 PM