Envirowise QF130V User manual

IMPORTANT INSTRUCTIONS -

OPERATING MANUAL

SAVE THESE INSTRUCTIONS

6727931 Rev. C 10-17 1 of 8

Supply Inline Fan

QF130V

READ AND SAVE THESE INSTRUCTIONS

READ CAREFULLY BEFORE ATTEMPTING TO ASSEMBLE, INSTALL, OPERATE OR MAINTAIN

THE PRODUCT DESCRIBED. PROTECT YOURSELF AND OTHERS BY OBSERVING ALL SAFETY

INFORMATION. FAILURE TO COMPLY WITH INSTRUCTIONS COULD RESULT IN PERSONAL

INJURY AND/OR PROPERTY DAMAGE!

RETAIN INSTRUCTIONS FOR FUTURE REFERENCE.

GENERAL SAFETY INFORMATION

When using electrical appliances, basic precautions should

always be followed to reduce the risk of ﬁre, electric shock and

injury to person, including the following:

WARNING:TO REDUCE THE RISK

OF FIRE, ELECTRIC SHOCK AND INJURY TO

PERSON, OBSERVE THE FOLLOWING:

a) Use this unit only in the manner intended by the manufacturer. If you

have questions, contact the manufacturer.

b) Before servicing or cleaning the unit, switch power off at service

panel and lock the service disconnecting means to prevent

power from being switched on accidentally. When the service

disconnecting means cannot be locked, securely fasten a

prominent warning device, such as a tag, to the service panel.

WARNING:TO REDUCE THE RISK

OF FIRE, ELECTRIC SHOCK AND INJURY TO

PERSON, OBSERVE THE FOLLOWING:

a) Installation work and electrical wiring must be done by qualiﬁed

person(s) in accordance with all applicable codes and standards,

including ﬁre-related construction.

b) Sufﬁcient air is needed for proper combustion and exhausting

of gases through the ﬂue (chimney) of fuel burning equipment

to prevent back drafting. Follow the heating equipment

manufacturer’s guideline and safety standards such as those

published by the National Fire Protection Association (NFPA)

and the American Society for Heating, Refrigeration, and Air

Conditioning Engineers (ASHRAE), and the local code authorities.

c) When cutting or drilling into wall or ceiling, do not damage electrical

wiring and other hidden utilities.

CAUTION:FOR GENERAL VENTILATING USE

ONLY. DO NOT USE TO EXHAUST HAZARDOUS OR

EXPLOSIVE MATERIALS AND VAPORS.

d) This unit must be grounded.

e) To avoid motor bearing damage and noisy and/or unbalanced impellers,

keep drywall spray, construction dust, etc. off power unit.

f) Read all instructions before installing or using exhaust fan.

g) For residential installations only.

h) Must use suitable weather hood with insect screen to protect air

intake.

WARNING:TO REDUCE THE RISK OF

FIRE, ELECTRIC SHOCK, DO NOT USE THIS FAN

WITH ANY SOLID-STATE SPEED CONTROL

DEVICE.

a) Must be connected to a GFCI (ground fault circuit interrupter)

protected branch circuit.

WARNING:DO NOT USE IN KITCHENS.

WARNING: THE DUCTING FROM THIS FAN HAS A

STRONG EFFECT ON THE AIR FLOW, NOISE AND ENERGY

USE OF THE FAN. USE THE SHORTEST, STRAIGHTEST DUCT ROUTING

POSSIBLE FOR BEST PERFORMANCE, AND AVOID INSTALLING THE FAN

WITH SMALLER DUCTS THAN RECOMMENDED. INSULATION AROUND

THE DUCTS CAN REDUCE ENERGY LOSS AND INHIBIT MOLD GROWTH.

Installing Contractor:

Installation Date:

Model Number: QF130V

18-HE118D1-1-EN

INSTALLATION INSTRUCTIONS

CAUTION: MAKE SURE POWER IS SWITCHED OFF AT

SERVICE PANEL BEFORE STARTING INSTALLATION.

SECTION 1

Preparing the Fan

1. Unpack fan from the carton and conﬁrm

that all pieces are present. In addition to

the fan you should have:

2 - Collar Assembly (attached)

2 - Mounting Brackets (attached)

1 - Controller (attached)

1 - 24 volt relay box (Included with

unit shipped loose in box)

1 - Instruction/Safety Sheet

2. Choose the location for your fan. To ensure

the best air and sound performance, it is

recommended that the length of ducting

and the number of elbows be kept to a

minimum, the radius of each elbow be as

large as possible for the installation, and

that insulated hard ducting be used. This

fan will require at least 12" of clearance in

the ceiling or wall. The fan mounts using

the provided mounting brackets or can be

surface mounted to a wall or ceiling.

NOTE: The fan must be installed into a location

that can be easily accessed once installed.

3. There are typically three installation options

for the unit:

Intake to Central Grill: The unit is

mounted into the attic space and the

airﬂow is directed through ducting to a

central location of the home (Figure 1).

Intake into HVAC System: The unit is

mounted next to the HVAC system with the

airﬂow directed into the return of the HVAC

system (Figure 2).

Direct Intake: The unit is mounted in a

mechanical room, laundry room or other

less occupied area and the airﬂow comes

directly into the space without the need

for extra ducting or tying into the HVAC

(Figure 3).

4. No additional vibration deadening materials

are needed for this fan.

SECTION 2

Mounting the Fan

1. Conﬁrm the fan is positioned so the air

ﬂow is in the correct direction.

2a. Surface Mounting: Locate at least one

stud or joist. Place the fan in position so

that the mounting bracket is centered on the stud or joist and make the location for the

four (4) holes. Remove the fan and install properly rated wall/ceiling anchors for the

holes that do not go directly into a joist or stud. Position fan in place and secure with

screws (not included) (Figure 4).

6727931 Rev. C 10-17 2 of 8

2b. Mounting to a Joist: Install two - 2 x 4 headers (not included) between the joists.

Position the fan housing on top of the headers and secure the mounting brackets with

screws (not included) to the header (Figure 5).

2c. Hanging Bar Mounting: Lift unit up onto the threaded rods and secure in place using

appropriate hardware (not included) (Figure 6).

SECTION 3

Ducting

NOTE: 6" OR LARGER RIGID DUCT OR 8" FLEX DUCTING IS RECOMMENDED FOR BEST

PERFORMANCE. DO NOT RUN MORE THAN 100 FEET OF TOTAL DUCTING (INCLUDES

SUPPLY AND RETURN). 8" FLEX DUCT @ 130CFM HAS ESP OF .06 FOR 100 LINEAR FEET

OF TOTAL DUCT. PRESSURE DROP FOR FILTER, INTAKE HOOD AND OUTLET GRILL MUST

BE ADDED TO GET TO TOTAL SYSTEM PRESSURE DROP.

CAUTION: ALL DUCTING MUST COMPLY WITH LOCAL AND

NATIONAL BUILDING CODES.

NOTE: The ducting from this fan to the outside of the building has a strong effect on the air

ﬂow, noise and energy use of the fan. Use the shortest, straightest duct routing possible

for best performance, and avoid installing the fan with smaller ducts than recommended.

Insulation around the ducts is required if QF130V is installed in non-conditioned space and is

recommended for all installations to reduce energy loss and inhibit mold growth.

WARNING: MAKE SURE THE FRESH AIR INTAKE PORT COMPLIES

WITH ALL LOCAL AND NATIONAL CODES AND IS LOCATED AT LEAST 6 FEET

AWAY FROM SOURCES OF CONTAMINATION SUCH AS BUT NOT LIMITED TO: DRYER,

FURNACE OR CENTRAL VACUUM EXHAUSTS, GAS APPLIANCES SUCH AS BBQ GRILLS,

GARBAGE BINS OR OTHER EXHAUST PORTS.

NOTE: To ensure quiet operation of in-line and remote fans, each fan shall be installed

using sound attenuation techniques appropriate for the installation. For general ventilation

applications, at least 8 feet of insulated ﬂexible duct shall be installed between the exhaust or

supply grille(s) and the fan.

1. Connect the ducting to the fan’s duct collar (Figure 7). Seal ducting to housing with

appropriately rated tape. Use screws or suitable clamps to secure in place. Make sure

the fresh air intake is connected to a properly installed intake port that is a suitable

weather hood with insect screen to protect air intake. It is recommended that low

restriction termination ﬁttings be used.

2. Ensure duct joints and exterior penetrations are sealed with caulk or other similar material

to create an air-tight path to minimize building heat loss or gain and to reduce the potential

for condensation. Place/wrap insulation around duct and/or fan in order to minimize

possible condensation buildup within the duct, as well as building heat loss or gain.

Bracket

Figure 6

Housing

Threaded Rod

Figure 4

Screws

Stud/Joist Anchor

Air Flow

Joist

2 x 4 Header

Figure 5

Bracket

12"

Figure 7

Air Flow

Intake

Ducting

Outlet

Ducting

Test Port

Figure 1

Unit

Intake to Central Grill

Grill

Wall Cap

Intake into HVAC System

HVAC

Return

Intake from

Wall Cap

Unit

NOTE: Blower interlock

is recommended in this

application but is not required.

Figure 2

Direct Intake

Intake from

Wall Cap

Figure 3

Unit

NOTE: At the base of the duct adapter, there is a small diameter test port hole covered with

a plastic cap. Make sure the test port is not covered up with the ducting so that it can be

accessed for pitot tube testing. To access the port, remove the port cover and insert tube.

SECTION 4

Wiring

CAUTION: MAKE SURE POWER IS SWITCHED OFF AT SERVICE PANEL BEFORE

STARTING INSTALLATION.

CAUTION: ALL ELECTRICAL CONNECTIONS MUST BE

MADE IN ACCORDANCE WITH LOCAL CODES, ORDINANCES, OR

NATIONAL ELECTRICAL CODE. IF YOU ARE UNFAMILIAR WITH

METHODS OF INSTALLING ELECTRICAL WIRING, SECURE THE

SERVICES OF A QUALIFIED ELECTRICIAN.

NOTE: This unit includes a side access panel for wiring that does not require the removal of the

fan’s blower assembly.

1. Remove the wire compartment cover screw and place cover in a secure place (Figure 8).

2. Pull the loose black, white and green wires out from the wire compartment (additional

wires will be present). Install an approved electrical connector to the wire compartment

cover (not included). Run a black (hot), white (neutral), and a green or bare ground

wire from the supply through the electrical connector. Connect all wires from the supply

to their corresponding wires within the wire compartment (Figure 9). Use approved

methods for all connections.

3. Carefully tuck wires back inside

wire compartment and replace wire

compartment cover securing with the

screw that was removed earlier.

SECTION 5

Setting the Speed

1. Remove the screw securing the access

panel cover in place and open the cover

to gain access (Figure 10).

2. Locate the speed control panel inside the

unit (Figure 11).

3. Set the dial to the required CFM as

determined by Table 4.1a. The unit can be

set from 30 CFM to 130 CFM (Figure 11).

6727931 Rev. C 10-17 3 of 8

SECTION 6

24V Control Relay

The 24V relay controller allows the until to be controlled from a remote located thermostat

with ventilation logic software or a switch. It is not necessary to install the 24V relay if the

QF130V is controlled by the unit mounted programmable controller.

NOTE: The 24V relay works in conjunction with the unit mounted programmable controller installed

on the QF130V and wall mounted thermostats that contain ventilation logic software. For the unit

to operate, it must be energized at the controller location connected by the 24V relay and meet the

preset criteria programmed into the unit mounted programmable controller. The Internal/External

switch must be in the External position or the remote controller will be bypassed.

CAUTION: MAKE SURE POWER IS SWITCHED OFF AT

SERVICE PANEL BEFORE STARTING INSTALLATION.

CAUTION: ALL ELECTRICAL CONNECTIONS MUST BE

MADE IN ACCORDANCE WITH LOCAL CODES, ORDINANCES, OR

NATIONAL ELECTRICAL CODE. IF YOU ARE UNFAMILIAR WITH METHODS OF INSTALLING

ELECTRICAL WIRING, SECURE THE SERVICES OF A QUALIFIED ELECTRICIAN.

1. Run approved low voltage wiring from the remote located controller/switch to the

relay box through the grommet on the side panel of the unit. Connect the wires to the

bare blue leads inside the relay box. Secure the low voltage wire to the relay controller

box using the cable tie provided. Thread the cable tie through opening in the Cable Tie

Holder. Wrap the wire around the cable tie twice and tighten the cable tie.

2. Remove the installed Molex jumper harness from the connector on the top of the wiring

compartment.

3. Install the relay control box by sliding the unit into the corner of the housing, remove

the jumper wire and connect the Molex on the box to the connector in the housing. This

will only ﬁt one way. Secure the box to the housing using the included screws (Figure

12).

Operation

1. When the toggle switch is in the “Internal”

position, the unit will bypass the relay and

operate the unit as controlled by the unit

mounted programmable controller.

NOTE: Important to double check the toggle position

before completing the installation!

2. When the toggle switch is in the “External”

position the unit will only energize when

the remote located controller is energized,

a ventilation call is activated by the remote

controller, and all the criteria (humidity,

temperature, etc.) of the unit mounted

programmable controller are met.

Figure 8

Screw

Wire

Compartment

Cover

Ground

Screw

Figure 9

Supply from house

Black

Neutral (White)

Ground (Green or Bare)

Fan

Neutral (White)

Green

Black

Green

Figure 12

Relay Box

Molex

Connector

Screws

Screw

Figure 10

Screw

Speed

Control

Figure 11

External

Internal

Figure 13

Relay

Box

Toggle Switch

Table 4.1a (I-P) Ventilation Air Requirements, cfm

Floor Area, ft2

Bedrooms

12345

<500 30 38 45 53 60

501 - 1000 45 53 60 68 75

1001 - 1500 60 68 75 83 90

1501 - 2000 75 83 90 98 105

2001 - 2500 90 98 105 113 120

2501 - 3000 105 113 120 128

3001 - 3500 120 128

Note: When calculating MVR, Minimum Ventilation Rate, State/Local Personnel should always

be consulted for Best Practices based on 62.2. There should not be greater than 7.5cfm/100ft².

6727931 Rev. C 10-17 4 of 8

SECTION 7

Connected Control Wiring

Onboard controller information to the unit.

SECTION 8

Motorized Damper

An optional motorized damper can be connected

to the unit. The damper is connected via a 24V

transformer that plugs into the receptacle in the

unit (Figure 14).

NOTE: Make sure to reference the instructions

included with the motorized damper before

installing or operating.

Operation

1. When installed the receptacle will be

energized anytime the fan is running. This

will in turn open the damper. When the fan

stops running, the damper will close.

SECTION 9

Air Filter

An air ﬁlter (included separately) can be added to this unit to provide additional ﬁltration of the

intake air. The unit will accept a nominal 10” x 10” x 2” ﬁlter. To install:

NOTE: Filters must be changed regularly. Refer to the ﬁlter manufacturer’s recommendations

to determine how often the ﬁlter should be changed.

1. Remove the screw securing the access panel cover in place and open the cover to gain

access to the controls and ﬁlter area.

2. Ensure the ﬁlter is facing the correct way and slide the ﬁlter into the slot in the housing.

Make sure the ﬁlter is seated all the way to the bottom of the housing (Figure 15).

3. Close the access panel and reinstall the screw holding the access panel in place.

SECTION 10

Completing the Installation

NOTE: Double check the toggle switch position to ensure correct operation according to control

application.

NOTE: When fan is mounted inline and no penetration is made into unconditioned spaces, there

is no need to use a sealant appropriate for contact with the building materials present and for the

temperature requirements of the installation to prevent air leakage from unconditioned spaces.

Additional material (backing rod, ceiling material) are also not required.

1. Close the access panel and reinstall the screw holding the access panel in place.

2. Restore power and test your installation.

SECTION 11

Setting the QF Controller

The unit mounted programmable controller monitors temperature and humidity of incoming

air and allows the installer to conﬁgure optimal ventilation.

With power to the unit turned on, the initial screen will show “OFF”. Press the “ON” button to

show the current temperature and humidity condition. By pressing the “ON” button, the unit

will turn on for continuous air ﬂow using the CFM settings from SECTION 5 Setting the Speed.

ON / OFF /

ENERGY SAVING

CONFIGURE UP DOWN

Figure 15

Filter

Screw

Air Flow

Figure 14

Receptacle

SOV

STG2

STG1

STG3

STG2

FAN

PWM

HUM

AUX1

AUX2

24V

ONLY

24V

ONLY

24V

ONLY

HUM*

AUX1*

AUX2*

RELAY PANEL ENVIROWISE Q130V

TCONT850/1050

COMMUNICATING

CONTROL

DRB

AUX 1

AUX 2

24VAC HOT

COMMON

SOV

COOLING

FAN

HEATING

ODT

AUX1

AUX2

B/C

ODT

RS1

824 COMFORT CONTROL

External

Internal

RELAY BOX

BLUE

ENVIROWISE Q130V

External

Internal

RELAY BOX

BLUE

NOTES:

1) Use #18 gauge solid or stranded wire.

2) Connect the wire between “R” and “AUX1” in the relay panel.

3) Connect the wire from the other remaining “AUX1” to the blue lead

of the ventilator relay box.

4) Connect the wire from “B” of the relay panel to the other blue

lead of the ventilator relay box.

5) See the TCONT850/1050 Installation Guide for instructions on

setting up the “AUX1” contacts for ventilation operation.

NOTES:

1) Use #18 gauge solid or stranded wire.

2) Connect the wire between “AUX1” and “RC” in the 824 Control.

3) Connect the wire from the other remaining “AUX1” to the blue lead

of the ventilator relay box.

4) Connect the wire from “B/C” of the 824 Controller to the other blue

lead of the ventilator relay box.

5) See the TCONT824 Installation Guide for instructions on

setting up the “AUX1” contacts for ventilation operation.

SOV

STG2

STG1

STG3

STG2

FAN

PWM

HUM

AUX1

AUX2

24V

ONLY

24V

ONLY

24V

ONLY

HUM*

AUX1*

AUX2*

RELAY PANEL ENVIROWISE Q130V

TCONT850/1050

COMMUNICATING

CONTROL

DRB

AUX 1

AUX 2

24VAC HOT

COMMON

SOV

COOLING

FAN

HEATING

ODT

AUX1

AUX2

B/C

ODT

RS1

824 COMFORT CONTROL

External

Internal

RELAY BOX

BLUE

ENVIROWISE Q130V

External

Internal

RELAY BOX

BLUE

NOTES:

1) Use #18 gauge solid or stranded wire.

2) Connect the wire between “R” and “AUX1” in the relay panel.

3) Connect the wire from the other remaining “AUX1” to the blue lead

of the ventilator relay box.

4) Connect the wire from “B” of the relay panel to the other blue

lead of the ventilator relay box.

5) See the TCONT850/1050 Installation Guide for instructions on

setting up the “AUX1” contacts for ventilation operation.

NOTES:

1) Use #18 gauge solid or stranded wire.

2) Connect the wire between “AUX1” and “RC” in the 824 Control.

3) Connect the wire from the other remaining “AUX1” to the blue lead

of the ventilator relay box.

4) Connect the wire from “B/C” of the 824 Controller to the other blue

lead of the ventilator relay box.

5) See the TCONT824 Installation Guide for instructions on

setting up the “AUX1” contacts for ventilation operation.

6727931 Rev. C 10-17 5 of 8

ENERGY SAVING MODE

NOTE: This unit is equipped with

an Energy Saving Mode that allows

you to conﬁgure upper and lower

limits for temperature and humidity.

By setting these limits, you will

help prevent extreme temperature

or humidity from entering into the

living space. When the controller

senses extreme conditions it enters

“Sampling mode”. In Sampling Mode

the unit will turn off for 15 minutes,

and then run for 5 minutes and

check to see if the conditions are

favorable for ventilation. If conditions

are favorable, the unit will operate

continuously, If conditions remain

unfavorable the unit will repeat the

above cycle until the conditions

become favorable and the unit can run continuously.

1. If you have not already pressed the “ON” button in step one of this section, do so now.

Press the “CONFIGURE” button once and the display will show a “C” and “Temp Unit”

on the right hand side.

2. Press the up or down button to display the temperature in Fahrenheit or Celsius.

3. Press the “CONFIGURE” button again to set the upper limit temperature. This is the

temperature that when the outside air coming into the home exceeds, the fan will stop

and enter sampling mode. You will see “Upper Limit” and “Temperature” on the right

hand side. Use the “UP” and “DOWN” buttons to adjust the temperature.

4. Press the “CONFIGURE” button again to set the upper limit humidity level. This is the

humidity level that when the outside air coming into the home exceeds, the fan will stop

and enter sampling mode. You will see “Upper Limit” and “Humidity” on the right hand

side. Use the “UP” and “DOWN” buttons to adjust the temperature.

5. Press the “CONFIGURE” button again to set the lower temperature level. This is the

temperature that when the outside air coming into the home falls below, the fan will stop

and enter sampling mode. You will see “Lower Limit” and “Temperature” on the right

hand side. Use the “UP” and “DOWN” buttons to adjust the temperature.

6. Press the “CONFIGURE” button again to set the lower limit humidity level. This is the

humidity level that when the outside air coming into the home falls below, the fan will stop

and enter sampling mode. You will see “Lower Limit” and “Humidity” on the right hand side.

Use the “UP” and “DOWN” buttons to adjust the temperature. Setting this to 0 or “LO” will

override the humidity set level. This may be necessary in very low humidity areas of the

country.

7. Press the “CONFIGURE” button until it returns to the main screen. You will see “ON” in

the top left corner of the display. At this point, the information has been stored.

SECTION 12

Using the Controller

1. Energy Savings Mode: To enter the Energy Savings mode, press the “ON/OFF/ENERGY

SAVINGS” Button until “Energy Savings” appears on the left side of the display. Energy

Savings mode engages the settings conﬁgured in SECTION 11 Energy Saving Mode.

2. When the unit is on, the display will show the current conditions (temperature and

humidity level) as well as if it is in Energy Savings mode or not. Other icons/information

that may be on the display include:

Fan icon appears when the fan is on.

“HI°F” appears if the intake temperature is above 150°F.

“Lo°F” appears if the intake temperature is below 15°F.

“Lo%” appears if the intake humidity is below 10%.

3. Optional Heater Unit: An optional heater unit is available for climates that the air coming

into the unit falls below 50°F and ventilation is required.

4. To restore the factory setting, make sure the unit is in the “OFF” setting. Hold both the

“UP” and “DOWN” buttons for approximately 5 seconds. The “OFF” on the display will

ﬂash to conﬁrm the settings have been restored.

SECTION 13

Use and Care

CAUTION: MAKE SURE POWER IS SWITCHED OFF AT

SERVICE PANEL BEFORE SERVICING THE UNIT.

1. Cleaning the Fan Assembly: Wipe all parts with a dry cloth or gently vacuum the fan.

NEVER IMMERSE ELECTRICAL PARTS IN WATER.

NOTE: If you notice a large amount of insects and debris in the insect ﬁlter, this could be a

sign that the intake weather hood (roof cap or wall cap) might be compromised and need

repair or replacing.

2. Air Filter: If the air ﬁlter is installed, it should be checked every month and replaced at

least once every 3 months. Reverse the instructions in SECTION 8 of these instructions

to remove ﬁlter.

CALIFORNIA RESIDENTS ONLY:

WARNING: THIS PRODUCT CAN EXPOSE YOU TO A CHEMICAL

[OR CHEMICALS] KNOWN TO THE STATE OF CALIFORNIA TO CAUSE

CANCER.

WARNING: THIS PRODUCT CAN EXPOSE YOU TO A CHEMICAL

[OR CHEMICALS] KNOWN TO THE STATE OF CALIFORNIA TO CAUSE

REPRODUCTIVE TOXICITY.

Controller Setttings

High Temperature Range 65° - 95 F

Default Setting 90° F

Low Temperature Range 32° - 55 F

Default Setting 40° F

High Relative Humidity

Range

55% - 85%

Default Setting 65%

Low Relative Humidity

Range

0%*, 10% -

50%

Default Setting 35%

* 0 Low Relative Humidity Range = Disabled

6727931 Rev. C 10-17 6 of 8

Troubleshooting Guide

Trouble Probable Cause Suggested Remedy

1. Fan does not operate. 1a. Control setting. 1a. Check temperature and humidity level settings. If the intake air is not within

the preset range, the fan will not turn on. Either adjust the settings or wait

for the intake air temperature and/or humidity to change.

1b. A fuse may be blown or a circuit tripped. 1b. Replace fuse or reset circuit breaker.

1c. Wiring is not connected properly. 1c. Turn off power to unit. Check that all wires are connected.

1d Motor has stopped operating. 1d. Replace motor.

2. Fan is operating, but air moves slower than normal. 2a. Obstruction in the ducting. 2a. Check for any obstructions in the ducting. The most common are bird

nests in the roof cap or wall cap where the fan intakes from the outside.

2b. Filter is clogged 2b. Change air ﬁlter (if equipped).

2c. Change/clear bug ﬁlter.

3. Fan is operating louder than normal 3a. Motor is loose. 3a. Turn off power to unit and check that all screws are fully tightened

Restore power to unit.

3b. Fan blade is hitting housing of unit. 3b. Call your dealer for service.

4. Fan operates brieﬂy then stops and cycles again. 4a. Blocked duct work or excessive length. 4a. Check for any obstructions in the ducting. The most common are bird