Pentax RLV450 User Manual

RLV450

User Guide

Programmable Thermostat

Temperature
preset buttons

Time and day

Set the time

Set the day

Program the schedule

Skip a period

Select the mode
of operation

Indicates the
heating power

Temperature
adjustment
buttons

* LP appears only for the first two minutes when the thermostat is without power. This

can occur during a power outage or when the thermal protection device inside the base­board heater is opened.

n

Description

Indicates that the
temperature setpoint
is displayed

Indicates that the
settings are locked

Temperature

Indicates the current
mode of operation

Temperature
preset icon

Indicates that the
thermostat is configured
for a fan-forced heater

Indicates the current
period (appears in
automatic mode only)

Indicates that the ther­mostat is without power *

This programmable thermostat can be used to control an electric
heating system such as an electric baseboard heater, a radiant ceil­ing, a radiant floor, a convector or a fan-forced heater.

NOTE: Always keep the thermostat's vents clean and unobstructed.

n

o Connect the thermostat wires to the line wires and to the load

wires using solderless connectors for copper wires.

1.

2-wire installation

The thermostat cannot be used with:

• a resistive load over 16.7 A

• a resistive load under 2 A

• a system driven by a contactor or relay (inductive load)

• a central heating system

SUPPLIED PARTS:

• One (1) thermostat

• Two (2) 6-32 screws

• Two (2) solderless connectors

o

Installation

TURN OFF POWER TO THE HEATING SYSTEM AT THE MAIN
POWER PANEL TO AVOID ELECTRICAL SHOCK. THE INSTAL­LATION MUST BE PERFORMED BY AN ELECTRICIAN.

 All cables and connections must conform to the local electrical

code.

 Special CO/ALR solderless connectors must be used when con-

necting with aluminum conductors.

 Install the thermostat onto an electrical box.
 Install the thermostat about 1.5 m (5 feet) high, on an inside wall

facing the heater.

 Avoid locations where there are air drafts (such as the top of a

staircase or an air outlet), dead air spots (such as behind a
door), or direct sunlight.

 Do not install the thermostat on a wall that conceals chimney or

stove pipes.

 The thermostat wires are not polarized; either wire can be con-

nected to the load or to the power supply.

4-wire installation

2.

p Push any excess wire back into the electrical box.

NOTE: If necessary, before re-installing the front component, config-

ure the thermostat (see section 3).

q Return power to heating system.

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p

The configuration switches are on the back of
the thermostat. The factory settings are indi­cated by the grey cells in the following table.

a. Early Start can be used in Automatic mode only. When this func-

b. Select short cycles in most cases as it provides better tempera-

c. The settings are locked. The temperature adjustment buttons

q

Configuration

SW1

Early Start

SW2 Display format °C / 24-hour °F / 12-hour

SW3

Cycle length

SW4

Keypad lock

tion is enabled, the thermostat calculates the optimal time to start
heating in order to obtain the desired temperature by the set time.
The thermostat re-assesses the start time daily based on the pre­vious day’s performance.

ture control. However, you must select long cycles if you have a
fan-forced heater. The word FAN is displayed when long cycles
are selected.

only allow you to view the temperature setpoint.

a

b

c

Off On

Short Long

Off On

Clock and Day Setting

n Press the Hour button to set the hour.
o Press the Min button to set the minutes.
p Press the Day button to set the day.

q Press the Mode button to end.

Daylight Savings Time

The thermostat can automatically re-adjust its clock at Daylight Sav­ings Time changeover. When this function is enabled (On), the ther­mostat switches to Daylight Savings Time on the second Sunday of
March and to normal time on the first Sunday of November.

NOTE: The function is disabled (default setting) when the clock loses
its setting.

n Press the Day button (3 seconds) until DLS appears

on the screen.

o Press either of the buttons to toggle between On

(enabled) and Off (disabled).

p Press the Day button briefly. The year setting is dis-

played.

q Press either of the buttons to set the current year.
r Press the Day button briefly. The month setting is dis-

played.

s Press either of the buttons to set the current

month.

t Press the Day button briefly. The date setting is dis-

played.

u Press either of the buttons to set the current date.
v Press the Mode button to end.

3.

r

Setpoint

The thermostat normally displays the actual temperature. To view the
setpoint, press the or button briefly. The setpoint will appear for
the next 5 seconds.

To change the setpoint, press the or button until the desired
temperature is displayed. To scroll faster, hold the button.

Using a preset temperature

The thermostat has 3 preset temperatures:

 Comfort temperature
 Economy temperature
 Vacation temperature

• To use the Comfort or Economy temperature, press the or

• To use the Vacation temperature, press both and buttons

Storing a preset temperature

4.

To store the Comfort or Economy temperature:

To store the Vacation temperature:

s

schedule. To place the thermostat in this mode, press the Mode but­ton until is displayed. The icons of the current period and preset

temperature are also displayed.

must be set manually. To place the thermostat in this mode:

Temperature Setting

Icon Intended use Factory setting

Comfort (when at home) 21.0°C (70°F)
Economy (when asleep or away from home) 16.5°C (62°F)
Vacation (during prolonged absence) 10.0°C (50°F)

button respectively. The corresponding icon will be displayed.

simultaneously. The icon will be displayed.

Set the desired temperature using the or button. Press and
hold the appropriate button ( or ) for approximately 3 sec-

onds until the corresponding icon is displayed.

Set the desired temperature using the or button. Press and
hold both and buttons simultaneously for approximately 3

seconds until the icon is displayed.

Modes of Operation

Automatic - The temperature is set according to the programmed

Temporary Bypass: If you modify the setpoint (by pressing the

, , or button) when the thermostat is in automatic mode,
the new setpoint will be used until the end of the current period.
When the next period starts, the temperature set for that period
becomes the new setpoint. To cancel the bypass, press the
Mode button.

Manual - The programmed schedule is not used. The temperature

5.

6.

n Press the Mode button until is displayed.
o Set the temperature using the , , or button.

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t

The schedule consists of 4 periods per day which represents a typi­cal 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.

Schedule

Period Description Setting

Wake

Leave

Return

Sleep

Period Setting

MO TU WE TH FR SA SU

6:00 AM6:00 AM6:00 AM6:00 AM6:00 AM6:00 AM6:00

8:00 AM8:00 AM8:00 AM8:00 AM8:00

AM

6:00 PM6:00 PM6:00 PM6:00 PM6:00

PM

10:00 PM10:00 PM10:00 PM10:00 PM10:00 PM10:00 PM10:00

AM

--:-- --:--

--:-- --:--

PM

7.

v

Thermostat is hot.

LO is displayed.

HI is displayed.

Wrong temperature is
displayed.

Wrong time is displayed.

Temperature does not
change according to the
programmed schedule.

LP appears on the
screen or the screen is
blank despite there is no
power outage.

Display looks faded
when heating is acti­vated

The settings cannot be
changed.

Troubleshooting

PROBLEM SOLUTIONS

This condition is normal. Under normal
operation, the thermostat housing can
reach a temperature between 35°C (95°F)
and 40°C (104°F).

The measured temperature is below the
display range. Heating is activated.

The measured temperature is above the
display range.

The thermostat is exposed to air draft.
Eliminate the draft.
The sticker on the thermostat’s screen has
not been removed.

The thermostat was without power for
more than 4 hours.

Check that the thermostat is in Automatic
mode. Check the schedule and clock set­tings.

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.

The heating system is less than the
required minimum load. This thermostat
cannot be used below that rating.

The settings are locked (see section 3).

9.

To modify the schedule:

n Press Pgm to access the programming mode. Period 1 is

selected.

o Press Day to select the day to program (hold for 3 seconds to

select the entire week).

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

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

q Press Pgm to select another period, or press Day to select

another day. Then repeat step 3.

r Press Mode to exit the programming mode.

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

automatically exit the programming mode.

u

During a power outage, LP (Low Power) appears for the first two min­utes. Then the screen becomes blank. The settings are stored in
memory. However, if the power failure exceeds 4 hours, the thermo­stat’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 opera­tion active prior to the power failure.

Power Outage

10.

w

Power: 120/240 VAC, 60 Hz
Minimum load: 2 A (resistive only)

Maximum load: 16.7 A (resistive only)

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)

8.

Setpoint interval: 0.5°C (1°F)
Storage: -20°C to 50°C (-4°F to 120°F)
Approval: c UL us

Technical Specifications

250 W @ 120 VAC
500 W @ 240 VAC

2000 W @ 120 VAC
4000 W @ 240 VAC

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