Aprilaire 8620W Installation Manual

Model 8620W Universal Touch Screen

Wi-Fi Thermostat with Integrated

Indoor Air Quality Solutions

Safety &

Installation

Instructions

READ AND SAVE THESE INSTRUCTIONS

TABLE OF CONTENTS

WI-FI SETUP

Wi-Fi Setup ..................................2

INSTALLATION

Installation location recommendations.............2

Outdoor temperature sensor (included).............2

Remote temperature sensor (optional) .............3

Thermostat mounting...........................3

Power & reset options..........................4

Wiring terminal ...............................4

WIRING DIAGRAMS

Conventional heat/cool single transformer..........5

Conventional heat/cool two transformer ...........5

Heat pump single transformer....................5

Heat pump two transformer .....................5

Indoor Air Quality equipment – dehumidifier . . . . . . . . 6

Indoor Air Quality equipment – humidifier . . . . . . . . . . 6

Indoor Air Quality equipment – ventilation..........6

SETUP & TESTING

Equipment type selection switch (SW1) ............7

Installer setup menu ...........................7

Change system settings.........................7

HVAC installer system settings table ............8-9

Indoor Air Quality system settings tables.......10-12

Air cleaning sytem settings table ..............10

Humidifier system settings table ............10-11

Dehumidifier system settings table .............11

Ventilation system settings table...............12

Removal of Indoor Air Quality control buttons ......13

System test menu .........................13-14

System test tables.........................15-16

REFERENCES

Quick reference to controls & display.............17

Troubleshooting ..............................18

Error codes ..................................19

Thermostat features ..........................19

Specifications................................20

INSTALLATIONWI-FI SETUP

For detailed instructions for connecting the thermostat to a Wi-Fi network and registering it to an Aprilaire account, refer to the Wi-Fi Quick Start Guide included in the box.

INSTALLATION

INSTALLATION LOCATION RECOMMENDATIONS

Thermostat should be mounted:

• On an interior wall, in a frequently occupied space.

• Approximately 5‘ above floor.

• At least 18” from outside wall.

• Thermostat can be mounted to a vertical junction box.

OUTDOOR TEMPERATURE SENSOR (INCLUDED)

Outdoor temperature can be measured by attaching the included 8052 sensor to the S1 and S2 terminals. The outdoor sensor must be enabled in the installer setup menu.

Heat pump models can use the outdoor temperature to effectively utilize the heat pump:

• When the outdoor temperature is less than the Low Balance Point, the heat pump will be locked out and only auxiliary heating will be used to provide heating.

• When the outdoor temperature is higher than the High Balance Point, the auxiliary heating will be locked out and only the heat pump will be used to provide heating.

Indoor Air Quality functions can use the outdoor temperature sensor to:

• Control humidification setpoint based on outdoor temperature to prevent condensation

• Lock out humidification for temperatures over 60°F or below -30°F.

• Lock out ventilation based on high and/or low outdoor temperatures.

• Display outdoor temperature on thermostat.

Outdoor temperature sensor should be mounted:

• On side of building out of direct sunlight (north side recommended).

• Above snow line.

• At least 3’ away from exhaust vents and condensing lines.

• Using less than 300’ of wire.

• Do not route wires along 120 VAC lines.

Do not mount thermostat:

• Behind doors, in corners or other dead air spaces.

• In direct sunlight, near lighting fixtures, or other appliances that give off heat.

• On an outside or unconditioned area wall.

• In the flow of a supply register, in stairwells, or near outside doors.

• On a wall with concealed pipes or ductwork.

REMOTE TEMPERATURE SENSOR (OPTIONAL)

A remote temperature sensor can be used for control if the thermostat is to be mounted in a concealed location or a remote sensor can be averaged with the thermostat sensor to control a large space. An 8051 flush mount or 8053 surface mount remote temperature sensor can be attached to the T1 and T2 terminals and mounted in a recommended area. The remote sensor must be enabled in the installer set-up menu, and once enabled will override or be averaged with the thermostat’s internal temperature sensor, based on the setting.

Remote temperature sensor should be mounted:

• On an interior wall, in a frequently occupied space.

• Approximately 5‘ above floor.

• At least 18” from outside wall.

• Using less than 300’ of wire.

Do not mount remote sensor:

• Behind doors, in corners or other dead air spaces.

• In direct sunlight, near lighting fixtures, or other appliances that give off heat.

• On an outside or unconditioned area wall.

• In the flow of a supply register, in stairwells, or near outside doors.

• On a wall with concealed pipes or ductwork.

• Near 120 VAC lines.

O/B

CI2

T2T1

THERMOSTAT MOUNTING

1. Remove the rear mounting plate from the thermostat.

2. Pull wires through the opening on the back of the rear mounting plate.

3. Position and level the mounting plate of the thermostat on wall and mark the hole locations with a pencil.

4. Drill 1/4” holes and insert supplied anchors (drywall only).

5. Place mounting plate over anchors, insert and tighten screws.

6. Seal wire entry holes to prevent drafts affecting temperature readings.

O/B

CI2

2 3

T2T1

INSTALLATION

GY2YO/BI1 WRC RW2S2LCI2 S1 T1 T2

INSTALLATION

POWER & RESET OPTIONS

The thermostat is powered from 24VAC. In the case of power loss the thermostat will maintain the clock for 24 hours. The thermostat has a memory backup that saves the thermostat settings in case of power interruption.

The reset button located under the cover on the front of the thermostat can be used to reset the thermostat to factory defaults. The system settings will also be set to default.

WIRING TERMINAL

Wire specifications:

18-24 gauge thermostat wire

C I2

I1 Y

O/BRC

Y2 W2

Installation notes:

• Ensure power at the HVAC equipment is off.

• Loosen screw terminals, insert stripped wire and re-tighten.

• Push the excess wire back into the opening and plug the wall opening to prevent drafts.

I1 & I2 – Indoor Air Quality control output

C – Common

O/B – Reversing valve

Y – First stage cooling (conventional) / First stage compressor (heat pump)

Y2 – Second stage cooling (conventional) / Second stage compressor (heat pump)

G – Fan

RC – 24VAC supply cooling

R – 24VAC supply heating

W2 – Second stage heat (conventional) / Second stage auxiliary (heat pump)

W – First stage heat (conventional) / First stage auxiliary (heat pump)

L – System fault indicator (optional) (heat pump only)

S1 & S2 – outdoor temperature sensor (included)

T1 & T2 – remote temperature sensor (optional)

Jumper between RC & R is used in single transformer systems (see wiring diagrams).

RESET BUTTON

90-2012

CONVENTIONAL HEAT/COOL WIRING DIAGRAMS

SINGLE TRANSFORMER (USE JUMPER WIRE) TWO TRANSFORMERS (REMOVE JUMPER WIRE)

HEATING

TRANSFORMER

COOLING

TRANSFORMER

FAN

2nd HEATING

1st HEATING

NOT USED

OUTDOOR TEMP

SENSOR

REMOTE TEMP

NOT USED

1st COOLING

2nd COOLING

FAN

TRANSFORMER

JUMPER

2nd HEATING

1st HEATING

NOT USED

OUTDOOR TEMP

SENSOR

REMOTE TEMP

NOT USED

1st COOLING

2nd COOLING

HEAT PUMP WIRING DIAGRAMS

SINGLE TRANSFORMER (USE JUMPER WIRE) TWO TRANSFORMERS (REMOVE JUMPER WIRE)

HEATING

TRANSFORMER

HEAT PUMP

1st COMPRESSOR

REVERSING VALVE

TRANSFORMER

FAN

2nd COMPRESSOR

JUMPER

2nd AUX HEATING

1st AUX HEATING

FAULT DETECT

SENSOR

OUTDOOR TEMP

REMOTE TEMP

1st COMPRESSOR

REVERSING VALVE

HEAT PUMP

TRANSFORMER

FAN

2nd COMPRESSOR

2nd AUX HEATING

1st AUX HEATING

FAULT DETECT

SENSOR

OUTDOOR TEMP

REMOTE TEMP

SENSOR

4 5

HC HP

GY2YO/BI1 WRC RW2S2LCI2 S1 T1 T2

INSTALLATION

SETUP & TESTING

INDOOR AIR QUALITY EQUIPMENT WIRING DIAGRAMS

DEHUMIDIFIER WIRING HUMIDIFIER WIRING

TRANSFORMER

DEHUMIDIFIER

HUMIDIFIER

VENTILATION WIRING

TRANSFORMER

EQUIPMENT TYPE SELECTION SWITCH (SW1)

This thermostat has the option of being used in heat pump or heat/cool systems. Switch SW1 located on the back of the thermostat’s face is used to select this option. This setting is displayed in the Installer System Settings

SW1

HEAT/COOL HEAT PUMP

under Equipment Type.

Note: Thermostat reboots within 10 seconds after switch position is changed.

HC HP

INSTALLER SETUP MENU

HOW TO ENTER THE INSTALLER SETUP MENU AND SELECT EQUIPMENT TO SETUP:

In the Installer Setup, HVAC or Indoor Air Quality setup can be selected. If Indoor Air Quality setup is selected, the user can then select to set up Air Cleaning, Humidification, Dehumidification or Ventilation.

Press [MODE] to set system to OFF.

Press [MENU] to enter main menu.

Press and hold [SETUP] for seven seconds, [INSTALL SETUP] appears.

Press [INSTALL SETUP] to enter installer setup menu.

Press

or to adjust the option.

Press [MENU] to exit.

Press [NEXT] to select option.

If Indoor Air Quality was selected, Press

or to adjust the Outdoor Sensor setting or Indoor Air Quality option.

Press [NEXT] to select Outdoor Sensor setting or Indoor Air Quality option.

System Settings can now be changed.

NORMALLY CLOSED DAMPER

CHANGE SYSTEM SETTINGS

Note: The I1/I2 output is a dry contact closure. The humidifier wiring diagram assumes the control is powering a

solenoid valve. The dehumidifier wiring diagram is for a normally open dry contact input. The ventilation diagram assumes the control is for a normally closed damper. Refer to the individual humidifier, dehumidifier or ventilation installation instructions for product specific wiring details.

SETTING OPTIONS

SETTING

DESCRIPTION

SETTING NUMBER

Press [NEXT] or [BACK] to page through the settings.

Press

or to adjust the setting.

Press [DONE] to save and exit, or [CANCEL] to exit without saving.

The thermostat will discard changes and exit if nothing is pressed within 60 seconds.

To reset the installer settings to the default, reset the thermostat by pressing the [RESET] button for 5 seconds.

Note: The reset button is disabled when the thermostat is removed from the wall for programming.

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