Aprilaire 8535 Manuel utilisateur

ELECTRONICTHERMOSTAT

Owner’sManual

MODELS

8535, 8536 & 8537

Digital Heat Pump Thermostats

110-965B 7/12/01 9:12 AM Page 1

OWNER’S MANUAL – TABLE OF CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Getting Familiar With The Aprilaire®Thermostat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

• Temperature Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

• Mode Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

• Temperature Settings – Day/Night Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

• Fan Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

• Outdoor Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Setting Up The Aprilaire Thermostat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Operating The Aprilaire Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Changing The Current Temperature Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Optional Feature – Locking The Keypad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Setting High And Low Balance Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

In Case Of Power Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Limited Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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– 1 –

IMPORTANT: READ ALL INSTRUCTIONS THOROUGHLY

Introduction

Thank you for your recent Aprilaire®Electronic Thermostat purchase. We sincerely

appreciate your business and are pleased to add your name to our growing list of customers.

With this purchase, you have invested in the highest quality equipment currently available.

Please be assured that in addition to product quality, we are committed to total product

performance and complete customer satisfaction.

Now, please take a few minutes to familiarize yourself with your new Aprilaire Thermostat.

In order to take advantage of all the benefits of your new thermostat, it is important that you

understand how to operate it.

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Fan

Mode

Day/Night

Outdoor

Press to raise and lower set point. Press both at the

same time to switch between ˚F and ˚C.Press and

release to view current set point.

Press to display

outdoor temperature

(w/optional Model 8041

Remote Outdoor

Sensor only).

Press to select Heat/

Emergency Heat/Cool/

Auto/Off. (Emergency

Heat Models 8536

& 8537 only)

Press for continuous

fan. Press again to

resume to auto fan.

Aprilaire

Digital Heat Pump Thermostat

Fan icon displays during

continuous fan only.

Heat and Cool Mode

icons.Both displayed

during Auto Mode.

Flame flickers during

heat call and Snowflake

flashes during cool call.

Set-point icon displays

the active set point

(full sun = Day set

point, partial moon

= Night set point).

Press to change

set point to either

the Day or Night

preset value.

Temperature ˚F or ˚C.

Room temp. normally

displayed. Press

Outdoor button to

display outdoor temp.

(Model 8041 required).

Displays mode when

changing (Heat, Cool,

Emergency Heat, Off,

and Auto).(Emergency

Heat Models 8536 &

8537 only)

Center LED illuminates

when back-up heat

source is being used.

(Models 8536 & 8537

only)

– 2 –

Figure 1 - Display and Button Description

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– 3 –

Getting Familiar with the AprilaireThermostat

(refer to Figure 1)

The LCD (Liquid Crystal Display) normally shows: the room temperature, the current mode of operation, if

the Day or Night temperature setting is being used, and if the system fan is set for continuous operation.

Temperature Display

Room temperature can be displayed in either degrees Fahrenheit or degrees Celsius. If the displayed

temperature seems abnormally high or low (example: 70˚F is equal to 21˚C), press the DECREASE

button and INCREASE button simultaneously to switch between ˚F and ˚C.

Mode Button

Four modes of operation are available for all the DSL heat pump thermostat models: Heat, Cool, Auto,

and Off. Additionally, with the Models 8536 and 8537, Emergency Heat mode is available. The mode of

operation indicates how you want your heating and cooling equipment to operate. Press the MODE

button until the desired mode of operation shows on the display.

Temperature Settings - Day/Night Button

The thermostat stores four temperature settings in its memory, two for heating (Emergency Heat uses the

same set points as the Heat mode) and two for cooling. The two temperatures for each mode are called

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the Day setting ” “ (a sun icon appears on the display) and the Night setting “ “ (a moon icon

appears on the display). The Day setting is intended to be an occupied or comfort setting and the Night

setting is intended to be an unoccupied or energy savings setting. For example the four settings stored

in the memory of the thermostat might be as shown in Table 1. Pressing the DAY/NIGHT button allows

you to instantly change to a more economical setting when leaving the house or going to bed, and to

a comfort setting when returning home or waking up. This

thermostat is equipped with accessory inputs which can be used

to automatically switch between day and night set points; contact

your installing contractor for more details.

Fan Button

The system fan will operate automatically during a heating or cooling cycle. If it is desired to run the fan

continuously, press the FAN button, and a Fan “ “ icon will appear on the display.

Outdoor Button

This button will be made functional when the optional Aprilaire Model 8041 Remote Outdoor Sensor has

been installed. It can then be used to find out the outdoor temperature from indoors. If the Model 8041

Remote Outdoor Sensor has not been installed, two dashes “– –” will appear on the display when this

button is pushed. – 4 –

MODE DAY NIGHT

Heat 68˚F 60˚F

Cool 78˚F 85˚F

Table 1 – Typical Set Point Values

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Setting Up The Aprilaire Thermostat

To ensure accurate temperature control, observe the following simple guidelines:

•When the thermostat is operating, close the cover to allow proper air circulation over the

temperature sensor.

•Do not place anything which can give off warm or cool air, such as candles or portable humidifiers,

near the thermostat.

1. Adjusting the Heat Temperature Settings. There are

two settings, the Day setting “ “ (a sun icon

appears on the display) and the Night setting “ “

(a partial moon icon appears on the display).

See Figure 2.

a. Press the MODE button repeatedly until HEAt

appears on the display.

b. Press the DAY/NIGHT button until the “ “ icon

(Day setting) appears on the display.

c. Use the DECREASE button and INCREASE

button to adjust the setting. – 5 –

DAY NIGHT

Figure 2 - Adjust Heat Settings

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– 6 –

d. Press the DAY/NIGHT button until the “ “ icon (Night setting) appears on the display.

e. Use the DECREASE button and INCREASE button to adjust the setting.

2. Adjusting the Cool Temperature Settings. There are two

settings, the Day setting “ “ (a sun icon appears on

the display when this setting is being used) and the Night

setting “ “ (a partial moon icon appears on the display

when this setting is being used). See Figure 3.

a. Press the MODE button repeatedly until COOL

appears on the display.

b. Press the DAY/NIGHT button until the “ “ icon

(Day setting) appears on the display.

c. Use the DECREASE button and INCREASE

button to adjust the setting.

d. Press the DAY/NIGHT button until the “ “ icon (Night setting) appears on the display.

e. Use the DECREASE button and INCREASE button to adjust the setting.

DAY NIGHT

Figure 3 - Adjust Cool Settings

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Operating The Aprilaire Thermostat

1. Select the mode of operation by repeatedly pressing the MODE button until the desired mode

appears on the display (“E ht” = Emergency Heat – Models 8536 and 8537 only). The heating and

cooling system may be turned off by selecting the “OFF” mode. Do not set to the “OFF” mode

during periods when freezing temperatures may occur.

• COOL: In the “COOL” mode a Snowflake “ “ icon appears on the display, which flashes

when the heat pump is running.

• HEAT: In the “HEAt” mode a Flame “ “ icon appears on the display, which flickers when the

heat pump is running.

• EMERGENCY HEAT (Models 8536 and 8537 only): In the Emergency Heat mode, “E ht” appears on

the display and only the back-up heat source (other than the heat pump) will be used to maintain

temperature. The center LED (located at the top of the thermostat) will light when the back-up

heat source is running.

• AUTO: In the “AUtO” mode, the heat pump will operate in either the “HEAt” or “COOL” mode

depending on which current setting the room temperature is closest to. Note that both the

Snowflake “ “ and Flame “ “ icons appear on the display.

– 7 –

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– 8 –

2. Select the temperature setting to be used by pressing the DAY/NIGHT button until the

desired previously stored temperature setting (Day or Night) appears on the display. Use the

DECREASE button and INCREASE button to change the temperature if desired (NOTE

that if changed, the new set point will be permanently stored in memory - see CHANGING THE

CURRENT TEMPERATURE SETTING).

3. After approximately 5 seconds the thermostat will return to the normal display.

Note: This thermostat utilizes time delays to protect the heating and cooling equipment. If the

equipment does not shut off or turn on immediately when the temperature setting has been

changed, it may be due to the built-in time delays (4 minutes max.).

4. Press the Fan button, if it is desired, to run the fan continuously. A Fan “ “ icon will appear

on the display when the fan is set to operate continuously.

110-965B 7/12/01 9:12 AM Page 10

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