Aprilaire 8145nc User manual

MODEL 8145 FRESH AIR VENTILATOR MODEL 8145NC FRESH AIR VENTILATOR

SAFETY INSTRUCTIONS

WARNING

1. 120 Volts may cause serious injury from electric shock. Disconnect electrical power before starting installation or servicing. Leave power

disconnected until installation/service is completed.

2. Sharp edges may cause serious injury from cuts. Use care when cutting plenum openings and handling duct work.

CAUTION

1. Read all instructions before beginning installation.

2. Improper installation may cause property damage or injury. Installation, service, and maintenance must be performed by a qualiﬁed service

technician.

READ AND SAVE THESE INSTRUCTIONS

VENTILATION CONTROLLER

FILTER

COVER

VENTILATION TERMINALSLOW PRESSURE

PORT

HIGH PRESSURE

PORT

INLET COLLAR AND

NORMALLY CLOSED

POWER DAMPER

OUTLET

COLLAR

SURFACE MOUNT

BRACKET LOCATION

JOIST MOUNT

BRACKET LOCATION

TABLE OF CONTENTS

Safety Instructions ...............................................1

Introduction and Compliance Statement ...........................2

Specifications ...................................................2

Install Electrical Outlet............................................2

Ventilator Location and Orientation................................3

Mount the Ventilator .............................................3

Mount Intake Hood ..............................................4

Install Ductwork .................................................4

Model 8145NC – Wiring to Various Controls.........................5

Model 8145NC – Test Mode .......................................6

Model 8145NC – Sequence of Operation............................6

Model 8145 – Wiring the Control to the HVAC System ...............6

Model 8145 – Connecting the Control to the Ventilator...............7

Model 8145 – Operation ..........................................7

Model 8145 – Test Mode ..........................................8

Measure Delivered Airflow ........................................8

Model 8145 – Set Up .............................................9

Model 8145 – Rater/Inspector Verification .........................10

Model 8145 – Sequence of Operation .............................10

Filter Cleaning...................................................11

Internal Schematics ..............................................11

Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Model 8145 and 8145NC

Fresh Air Ventilator

Installation and Operating Instructions

10014353 B2208589A 4.20 English 1

INTRODUCTION AND COMPLIANCE STATEMENT

The Model 8145 and 8145NC Fresh Air Ventilators are designed to bring in precisely the right amount of outdoor air into today’s efficiently designed

homes. Duct the inlet of the ventilator to an outdoor air intake and duct the discharge to the HVAC system, then simply plug the unit in, set the

amount of needed ventilation and select the desired temperature limits.

When properly installed and set, the Model 8145 and 8145NC Fresh Air Ventilators will meet the mechanical ventilation requirements of:

Energy Star Certified Homes

EPA Indoor airPLUS

2012-2018 International Residential Code (IRC)

2012-2018 International Energy Conservation Code (IECC)

California Energy Commission Title 24

ASHRAE Standard 62.2-2010

ASHRAE Standard 62.2-2013 & 2016

SPECIFICATIONS

TABLE 1 – SPECIFICATIONS

External Static Pressure ("w.c.) Airflow (CFM) Efficacy (CFM/watt) Voltage

0.0 210 5.2

120 VAC

1 phase

60 Hz

0.2 180 4.4

0.4 150 3.5

0.6 120 2.8

13.906

12.25

13.01

23.41

19.66

INLET: ROUND COLLAR

FOR 6" DIAMETER DUCT

OUTLET: OVAL COLLAR

FOR 6" DIAMETER DUCT

CONTROL NOT INCLUDED

ON MODEL 8145NC

90-2514

FIGURE 1 – DIMENSIONS (INCHES)

INSTALL ELECTRICAL OUTLET

Install a standard NEMA 5-15 receptacle suitable for the location, near where the ventilator will be installed. The ventilator comes equipped with a

6-foot power cord with a standard 3-prong plug.

2 English

MOUNT THE VENTILATOR

1. Select the needed brackets, large or small, for mounting the ventilator (see FIGURE 3).

If mounting to the wall or hanging from joists, use the four small mounting brackets.

Ifmounting on or in between the floor joists, install all four smaller brackets for 13" on center

joists, or two small and two longer brackets for 16" on center joists.

2. Snap the brackets into the proper locations as shown in FIGURE 4. Use the mounting locations

nearest the cover for mounting between floor joists or hanging from rafters. Use the mounting

locations near the bottom of the unit for surface mounting (i.e. to a flat wall, ceiling surface or

bottom of joists).

3. Screw the ventilator brackets into joists or a strong platform using the #10 x 3/4” screws

provided. The ventilator weighs approximately 15 pounds, so do not secure into drywall alone.

BETWEEN

JOISTS

HANGING

INSTALLATION SURFACE MOUNT

90-2514

FIGURE 4 – MOUNTING BRACKET POSITIONING

VENTILATOR LOCATION AND ORIENTATION

If the outlet of the ventilator is not ducted, or if small sections of

collapsible duct (i.e. flex duct) are attached to the outlet, then the

ventilator must be mounted to minimize the possibility of accessing

moving parts (see Cautions below).

CAUTION

1. Mount the blower with the lowest, exposed moving parts at

least 8 feet (2.4 m) above ﬂoor or grade level.

2. Mount the blower at least 3.3 feet (1.0 m) from any accessible

opening of the duct.

Choose a location for the ventilator that is within 6 feet of the outlet

into which the ventilator will be plugged. Allow space for filter removal

and service as shown in FIGURE 2.

The ventilator can be mounted in any orientation.

12"

FILTER

ACCESS

24"

FAN

ACCESS

90-2514

FIGURE 2 – CLEARANCES FOR SERVICING

FIGURE 3 – BRACKETS

English 3

MOUNT INTAKE HOOD

Install a weather tight hood with a bird screen.

Cut a hole in the exterior wall that is large enough to fit 6" insulated flexible duct through with minimal compression of the insulation. Pull the duct

through the hole and attach the flex duct to the collar of the hood. Use metal foil tape or a plastic zip-tie to secure the duct to the collar. Pull the

insulation and vapor barrier over the duct and tape it to the collar.

IMPORTANT: The end of the insulation must be sealed to prevent condensation from forming inside the insulation. If a plastic zip-tie is used to

secure the insulation to the hood collar, also tape the end to seal it against condensation problems.

Press the hood against the outside wall and secure in place with screws; seal around the perimeter of the hood with caulk.

INSTALL DUCTWORK

Install 6" diameter flexible, insulated duct

from the round inlet collar of the unit to the

intake hood and from the oval outlet collar

of the unit to the HVAC system. Duct the

outlet of the ventilator to the return side of

the HVAC system (refer to FIGURE 5).

IMPORTANT: The end of the

insulation must be sealed to prevent

condensation from forming inside

the insulation. If a plastic zip-tie is

used to secure the insulation to the

hood collar, also tape the end to seal

it against condensation problems.

FILTER

FURNACE/AIR HANDLER

AIR FLOW

FRESH AIR

VENTILATOR

FRESH AIR INTAKE DUCT

FRESH AIR

OUTSIDE

WALL

TYPICAL BASEMENT INSTALLATION

FRESH AIR

VENTILATOR

GABLE END WALL, BAND JOIST, OR PORCH SOFFIT

FRESH AIR

FRESH AIR INTAKE DUCT

FRESH AIR

INTAKE HOOD

WITH SCREEN

FRESH AIR

INTAKE HOOD

WITH SCREEN

RETURN MIXING BOX FURNACE/AIR

HANDLER

FILTER

AIR FLOW

TYPICAL ATTIC INSTALLATION

VENTILATION

TERMINALS

VENTILATION

TERMINALS

90-2514

FIGURE 5 – DUCTING IN UPFLOW AND HORIZONTAL HVAC SYSTEMS

4 English

MODEL 8145NC – WIRING TO VARIOUS CONTROLS

Suggested Controls:

• Aprilaire IAQ Control Models 8910, 8910W or 8920W

• Aprilaire Thermostat Models 8620 or 8620W

• Aprilaire Model 8120X Digital Ventilation Controller

Select the diagram that corresponds to the control to be used. Wire the controls to the HVAC equipment and any other IAQ accessory in accordance

with the literature provided with the control.

CONTROL MODULE OF IAQ CONTROL

VENT

SEE

NOTE 1

MODEL 8620/8620W THERMOSTAT

VENT

C I2

I1 Y

O/B RC

Y2 W2

L T2

SEE NOTE 1

ODT

VENT

MODEL 8120X DIGITAL VENTILATION CONTROLLER

VENT

SEE NOTE 1

FIGURE 6 – WIRING TO IAQ CONTROL FIGURE 7 – WIRING TO THERMOSTAT

FIGURE 8 – WIRING TO MODEL 8120X

NOTE 1: An outdoor temperature sensor must be installed to use outdoor

temperature limits for ventilation control.

English 5

MODEL 8145NC – TEST MODE

After all ducting and wiring is complete, plug in the ventilator, restore power to the HVAC system and make sure the switch controlling the outlet into

which the ventilator is plugged (if applicable) is turned on.

1. Use the installed control to complete a circuit between the VENT terminals on the 8145NC.

2. Verify that the ventilator blower starts and that the integral damper opens.

3. If the ventilator has been wired to turn on the HVAC blower with ventilation, verify that the blower is on.

4. Measure the airflow (CFM) that the installed ventilator is delivering. See MEASURE DELIVERED AIRFLOW section on page 8.

5. Using the instructions provided with the installed control, adjust the ventilation settings as required.

MODEL 8145NC – SEQUENCE OF OPERATION

Refer to the installation manual provided with the control that is wired to the Model 8145NC.

MODEL 8145 – WIRING THE CONTROL TO THE HVAC SYSTEM

NOTICE

Disconnect power to HVAC system during wiring to avoid

electrical shorts.

1. Remove the control from the mounting plate as shown in FIGURE 9.

Set control aside in a safe place until all wiring has been completed.

2. Run a 6-conductor (min.) cable (for furnace/AC applications) or a

7-conductor (min.) cable between the control and the HVAC system.

3. Wire to the HVAC system in accordance with FIGURE 10 if installed in

a furnace/AC application or FIGURE 11 if installed with a heat pump.

CONTROL

CONNECTOR

CONTROL

MOUNTING

PLATE

CONTROL

VENTILATION CONTROL

THERMOSTAT

WIRE NUT

(FIELD

SUPPLIED)

FURNACE

R & C = 24 VAC

Y = COOLING

W = HEAT

GS = FAN INPUT

GH = FAN OUTPUT

VENT

ODT

90-2514

FIGURE 9 – REMOVE CONTROL FROM MOUNTING PLATE

FIGURE 10 – WIRING VENTILATION CONTROL TO A FURNACE

6 English

VENTILATION CONTROL

HEAT PUMP THERMOSTAT

WIRE NUT

(FIELD

SUPPLIED)

R & C = 24 VAC

Y = COMPRESSOR

W1 = 1st STAGE AUX. HEAT

O = REV. VALVE, COOLING

GS = FAN INPUT

GH = FAN OUTPUT

VENT

ODT

HEAT PUMP

FIGURE 11 – WIRING VENTILATION CONTROL TO A HEAT PUMP

MODEL 8145 – CONNECTING THE CONTROL TO THE VENTILATOR

Plug the Control Connector into the back of the

control at the location shown in FIGURE 12. Route

the connector wire through the channels in the

control and reattach the control to the mounting

plate. Restore power to the HVAC system and plug

in the ventilator when complete.

CONTROL BACK CONTROL FRONTCONTROL MOUNTING PLATE

90-2291

FIGURE 12 – PLUG THE CONTROL INTO THE VENTILATOR

MODEL 8145 – OPERATION

The display will appear faint normally; the first press of any button will turn on the display at full power.

MIN/

CODE

Use for Rater/Inspector Verification.

Press and hold for 5 seconds to

enter Test Mode or Set Up Menu.

Lights green when ventilating.

Shows the ventilation time setting (minutes/hr), mode of operation

(Code or Comfort) and whether the HVAC fan has been turned on when ventilating.

Use to override the calculated ventilation

time setting (6 – 60 minutes/hr). Press

and hold to turn ventilation OFF.

To return to the calculated setting, go

completely through the Set Up Menu.

English 7

MODEL 8145 – TEST MODE

After wiring and set up have been completed, Test Mode can be used to verify that all components in the ventilation system function and that wiring

to the HVAC system fan is correct.

TABLE 2 – MODEL 8145 TEST MODE MENU

Test Sequence Description

°F

Shows outdoor temperature or ----°F if no

separate outdoor temperature sensor has been

installed. Model 8145 installations do not require a

separate sensor – outdoor temperature is measured

by the control's on-board sensor.

tESt shows on the display, the green Fresh Air LED

will light and either the damper will open or the

power ventilator will turn on depending on what

has been wired to the VENT terminals.

Hold for 5 seconds.

MEASURE DELIVERED AIRFLOW

1. Make sure the ventilator is plugged in and wired to an external control (Model 8145NC) or that

the integral control is wired to the HVAC system (Model 8145).

2. Use 1/4" flexible tubing to attach a pressure gauge set to " w.c. (sometimes shown as “in. w.g.”

or “in. H2O”) to the inlet and outlet pressure ports on the ventilator. The pressure gauge should

have as small a range as possible to get a meaningful measurement – a range of 1.0" w.c. should

be sufficient. Connect the high or “+” port of the gauge to the outlet pressure port on the

ventilator, and the low or “-“ port of the gauge to the inlet pressure port on the ventilator. See

FIGURE 13.

3. Model 8145NC – Turn on the ventilator using the installed control for the Model 8145NC. This

can be done by temporarily changing the ventilation setting to 60 minutes/hour or you can

simply place a jumper between the VENT terminals of the ventilator.

Model 8145 – Turn on the ventilator by using the “Up” button to increase the ventilation setting

to 60 MIN./HR.

4. Use the label on the cover of the ventilator, or TABLE 3, to convert the pressure reading to

delivered airflow. If the pressure reading false between listed values, either use the lower value

or interpolate between values: CFM = Lower Value + [(Higher Value – Lower Value) * 10 *

(Pressure Reading – Lower Value Pressure)]. The following is an example:

a. Measured Pressure Reading is 0.34" w.c.

b. Table 3 lists 200 CFM @ 0.3" w.c. and 170 @ 0.4" w.c.

c. Either use 170 CFM or interpolate:

CFM = 200 - [(200-170) *10 *(0.34-0.3)] = 200 - [(30) *10 *(0.04)] = 200 - 12 = 188 CFM

Interpolating will demonstrate higher delivered airflow, but requires a calculation to be done.

TABLE 3 – DELIVERED AIRFLOW

CORRESPONDING TO MEASURED PRESSURE

AT VENTILATOR PRESSURE PORTS

Measured Pressure

(" w.c.)

Delivered Airflow

(CFM)

0.1 255

0.2 225

0.3 200

0.4 170

0.5 145

0.6 115

0.7 90

TABLE 2 – MODEL 8145 TEST MODE MENU

Test Sequence Description

MEASURED REQ’D CONT CFM

FAN

After 15 seconds, the HVAC fan will turn on if it has

been wired and set up to do so. The display will

show FAN along with tESt.

MIN/

CODE

After 45 seconds Test Mode automatically

completes and the display returns to the operating

display.

INLET

OUTLET

90-2520

FIGURE 13 – MEASURE PRESSURE AT

INLET AND OUTLET PRESSURE PORTS

8 English

MODEL 8145 – SET UP

NOTICE

Before setting up the control for use, the amount of ventilation air being delivered (CFM) by the installed ventilation system must be measured.

Hold for 5 seconds, then release.

Throughout the Set Up Menu, the and buttons are used to change values, the Select button is used enter the value and move on to the next Set

Up Menu item.

TABLE 4 – MODEL 8145 SET UP MENU

Menu Item Values Description

HP or HC HP if wiring to a heat pump.

HC if wiring to furnace and AC.

CODE

BEDROOMS

HIGH

1 – 10

Number of bedrooms –

used to calculate required

continuous ventilation rate.

COMFORT

HOUSE

(

)

LOW

500 – 7500 ft2

Square footage – used to

calculate required continuous

ventilation rate.

MEAS

REQ

’

D CONT

CFM

FAN

30 – 250 CFM Measured outdoor airflow

delivered during ventilation.

°F

CODE NO.OF BEDROOMS

HIGH

OFF,

85°F – 105°F

Ventilation high temperature

limit. Ventilation is limited

when the outdoor temperature

exceeds the setting. Turn OFF if

no high limit is desired.

°F

COMFORT HOUSE (FT

)

LOW

OFF,

-10°F – 40°F

Ventilation low temperature

limit. Ventilation is limited

when the outdoor temperature

falls below the setting. Turn

OFF if no low limit is desired.

MEAS REQ’D CONT CFM

FAN

On, “bLnd”, OFF

ON HVAC fan turns on

whenever ventilation occurs.

bLnd (blend) HVAC fan turns

on with ventilation only when

the outdoor temperature is

outside a set range.

OFF HVAC fan is not turned on

with ventilation.

TABLE 4 – MODEL 8145 SET UP MENU

Menu Item Values Description

°F

MEAS REQ’D CONT CFM

FAN

CODE # BEDROOMS

HIGH

OFF, 60°F to 5°F

less than Vent.

High Temp. Limit

Only available when bLnd is

selected. When the outdoor

temperature is above the

setting, the HVAC fan will

be turned on to mix (blend)

outdoor air with indoor air for

tempering.

°F

MEAS REQ’D CONT CFM

FAN

COMFORT HOUSE (FT

)

LOW

OFF, 5°F less

than Vent. Low

Temp. Limit to

55°F

Only available when bLnd is

selected. When the outdoor

temperature is below the

setting, the HVAC fan will

be turned on to mix (blend)

outdoor air with indoor air for

tempering.

CODE

COMFORT

See IMPORTANT

NOTE below.

“codE”, “cFrt”

codE No RH limits and any

missed ventilation due to

temperature is made up per

ASHRAE 62.2-2010.

cFrt (comfort) Adds indoor RH

limits to ventilation; ventilation

missed due to limits is not

made up.

CODE # BEDROOMS

HIGH

OFF,

45% – 70% RH

Only available when cFrt is

selected. When the outdoor RH

exceeds the setting, ventilation

will not occur.

COMFORT HOUSE (FT

)

LOW

OFF,

10% – 30% RH

Only available when cFrt is

selected. When the outdoor

RH drops below the setting,

ventilation will not occur.

When all Set Up Menu options have been entered, the control will

display donE.

IMPORTANT NOTE: The 8145 control senses the temperature and humidity of the outdoor air. To prevent extended periods of inactivity, set the

control mode to codE, or if setting to cFrt (comfort), set the RH limits to OFF.

English 9

MODEL 8145 – RATER/INSPECTOR VERIFICATION

To verify the ventilation time setting, press the Select button to scroll through the calculated Required Continuous CFM and the Measured CFM for

this installation. If any value does not match the expected value, the Set Up Menu must be entered to change the floor area, number of bedrooms or

measured CFM.

The calculation used for the ventilation time setting is (all calculations compliant with ASHRAE Standard 62.2-2010):

)

Required Continuous CFM

Measured CFM

(

Minutes per Hour = 60 *

Required Continuous CFM = ((Floor Area ft2*.01) + (No. of Bedrooms + 1) *7.5)

Measured CFM is entered during set up and Required Continuous CFM is calculated according to the equation below:

MIN/

CODE

MEAS

REQ

’

D CONT CFM

FAN

MEAS

REQ

’

D CONT

CFM

FAN

MODEL 8145 – SEQUENCE OF OPERATION

“CODE” SETTING

The control will turn on ventilation with a heating, cooling or fan call for the set number of minutes during a one-hour cycle period. If the outdoor

temperature is above the high temperature ventilation limit, ventilation will not occur with a cool or fan call, but if it is below the low temperature

ventilation limit it will occur with a heat call. If the HVAC equipment does not turn on enough to meet the ventilation time within the hour, the control

will turn on ventilation without a call, if the outdoor air temperature is within the high and low ventilation temperature limits. The control will also

turn on the HVAC system blower, if wired and set up to do so.

If the outdoor temperature exceeds the limits set at the end of the first hour, then no additional ventilation will occur for another 60 minutes, and the

cycle period will automatically adjust to four hours. When the ventilator starts again, it will sample the air temperature and if in range, will meet the

set amount of ventilation during the four-hour cycle period. For example, if the Vent Time was set to 25 minutes per hour and the air temperature fell

below the low limit setting ventilation would only occur during a heating call. If the heating only operated for 10 minutes during the hour, the control

will automatically change the cycle period to four hours and work to provide the additional 90 total minutes of ventilation (25 min/hr * 4 hours = 100

minutes, minus the 10 minutes of ventilation that occurred during heating) during the four-hour cycle period.

If the air temperature is still out of range, the control will automatically switch to an 8-hour cycle period, then a 12-hour cycle period and finally a

24-hour cycle period. During 8, 12 and 24 hour cycle periods, the total ventilation time increases to compensate for ventilation effectiveness as defined

in ASHRAE Standard 62.2-2010. When the cycle period automatically adjusts to 24-hours, the control will turn on ventilation to meet the requirements

even if the temperature is outside of the set limits.

“COMFORT” SETTING

The control will turn on ventilation with a heating, cooling or fan call by the HVAC equipment, if the outdoor air temperature is within the high and

low ventilation temperature limits and the outdoor RH is within the high and low RH limits, for the set number of minutes during a one-hour cycle

period. If the HVAC equipment does not turn on enough to meet the ventilation time within the hour, the control will turn on ventilation without a

call, if the outdoor air temperature and indoor RH is within the set limits. The control will also turn on the HVAC system blower, if wired and set up to

do so.

10 English

This manual suits for next models

Table of contents