Ventcool Tahoe series User manual

www.eldcontrols.com

Please retain these instructions after installation.

This device MUST be installed by a qualied agency in accordance with the manufacturer's installation instructions. The denition of

a qualied agency is: any individual, rm, corporation or company which either in person or through a representative is engaged

in, and is responsible for, the installation and operation of HVAC appliances, who is experienced in such work, familiar with all the

precautions required, and has complied with all the requirements of the authority having jurisdiction.

Installation Date:

Installed By: Phone:

P/N 780102000 07/20 Rev F

VentCool®Tahoe Series

WHOLE HOUSE FAN SYSTEMS

MODELS: T2, T3, T4, T5

INSTALLATION MANUAL

ITEMS INCLUDED:

• Fan Assembly with steel support straps, hardware and 20 foot power cord

• Duct Support Straps & hardware

• Acoustic Flex Duct, 7 foot length with collars

• Gravity Damper Assembly

• “Eggcrate” style Inlet Grille (white) with mounting screws

• Wall Mount WTT Control (ON/OFF, 2 Speed and 12-hour timer), white

decora wall plate and 50 foot cable

page 2 of 20P/N 780102000 07/20 Rev F

(THIS PAGE LEFT INTENTIONALLY BLANK)

page 3 of 20

SAFETY CONSIDERATIONS

•

Never

operate this fan without a window or door opened.

•

This fan is meant for general ventilation.

It has NOT been designed to ventilate particle laden and/or

explosive mixtures of air and must NOT be used for such.

•

This fan is NOT for use in kitchens

•

Before installing or servicing this fan, switch power o at the home’s electrical panel to reduce the risk

of damaging circuit boards, re, electrical shock, or injury.

•

Install this fan in accordance with this manual and all local codes and standards.

Some of the principles of safe installation and operation of this product are not immediately obvious.

Read the following safety information before continuing further:

Thank you for purchasing a VentCool

®ducted Whole House Fan by Field Controls. This fan has been designed

to provide many years of natural, quiet, and energy-ecient cooling.

Please take a few minutes to read over this manual and its accompanying documents to make sure you are

prepared to install the Whole House Fan system. In particular:

•

The homeowner/resident should read the WHERE TO LOCATE section so that the fan will be correctly lo-

cated to maximize its eectiveness and eciency.

•

The VENTILATION REQUIREMENTS section is also particularly important, as it describes the minimum attic

ventilation neccessary to operate the fan.

•

The INSTALLATION: GRAVITY DAMPER section contains important information regarding the constraints

within which this fan’s gravity damper must be installed.

The Eggcrate Inlet Grille and Gravity Damper Assemblies come in dierent size openings. Verify which

gravity

damper component design is part of your Whole House Fan Assembly by actual measurement of the gravity

damper opening section before beginning installation of gravity damper section.

Before installing this fan, inspect it and all of its parts for any damage it may have sustained during shipping.

DO NOT INSTALL DAMAGED EQUIPMENT.

If you suspect this fan has been damaged during shipping, contact

Field Controls technical support by phone at 1.800.742.8368, or email at eldtec@eldcontrols.com.

Whole House Fans are designed to be installed within a home’s attic, which makes them and their sub-

components dicult to access once installed.

TEST THIS FAN OUTSIDE OF THE ATTIC BEFORE INSTALLING IT

PERMANENTLY.

P/N 780102000 07/20 Rev F

page 4 of 20

GRAVITY DAMPER INFORMATION

ELECTRICAL REQUIREMENTS

The VentCool PSC Tahoe Series Whole-House Fan Systems require a 115 volt electrical power supply of mini-

mum 15A ampacity and maximum 15 Amp circuit overcurrent protection. We strongly recommend providing

a dedicated circuit for this fan system.

All electrical components, whether included with the VentCool system or supplied by others, must be rated for

the fan system’s electrical load requirements; please refer to the VentCool Tahoe Series specications table for

the electrical load requirements of the specic model to be installed.

All wiring and connections must be made according to this manual and all applicable electrical

wiring codes and standards. All applicable electrical codes must be followed to the satisfaction of the local

authority having jurisdiction.

VentCool Tahoe Series Whole House Fan Systems are shipped with a pre-wired 20 foot 115VAC power cord

with Nema 5-15P plug and fan control module (FC3JF) prewired and installed on the fan assembly. The fan

assembly directly connects to the Ventcool digital wall control (WTT) system via 50 foot Plug&Play (P&P) cable.

The P&P cable is equipped with RJ12 connectors that plug directly into the fan assembly control module

and backside of the wall control display. The wall control display is mounted in the living space and is used

for fan control (on/o, timer operation or temperature operation) of the whole house fan system. Refer to

INSTALLATION: Wiring & Controls section for wiring and connection diagrams for the Ventcool Tahoe Series

Whole House Fan (Generation 4) product line.

The Ventcool Tahoe Series Whole House Fan Systems have dierent gravity damper sizes,

depending on the specic model to be installed. Verify which gravity damper size is provided with your

system prior to beginning installation of the product.

The VentCool Tahoe Series fan systems include gravity-closed gravity damper doors that are opened by air

pressure created by fan operation. The dampers serve to block entry of air from the attic into the living space, and

are provided with foam sealing and insulating material in the doors to reduce heat transfer from the attic space.

P/N 780102000 07/20 Rev F

page 5 of 20

VENTILATION REQUIREMENTS

It is very important that the attic be suciently ventilated for the fan system to operate properly. Without

adequate ventilation, hot air exhausted from the home cannot easily escape from the attic, which creates

back-pressure that will substantially reduce the fan’s performance. Operating this fan in an attic with less net

free ventilation area than recommended will decrease its airow and energy eciency.

If subject to the California Title 24 requirements for whole-house fan ventilation, the fan system must be installed

to the minimum ventilation requirements as found in the standard.

In the absence of applicable local code regarding whole-house ventilation, we recommend a minimum of 1

square

foot of “net free” ventilation area per 500 cfm at a fan’s highest speed for proper operation.

Refer to specication

table for required Net Free Ventilation Area in Attic at HVI fan rating.

Net

Free Ventilation Area

can be provided by any combination of gable, eyebrow, roof cap, sot, or ridge

vents, or any other method of ventilating the attic space. The openings of most vents are partially obstructed

by grilles, louvers, and/or screens. A vent’s “net free” ventilation area is the surface area of its opening minus the

surface area of any grilles, louvers, or screening covering it. Dierent types of vents have dierent ratios of net free

area to total area.

While most properly constructed homes have adequately ventilated attics, not all do. Because sucient

ven

tilation is a very strong factor in this fan’s performance, it is important that the home’s existing ventilation be

veried before it is installed.

Manufacturers typically publish their vents’ net free ventilation areas and/or ratios in their products’

specication documents. If this information is unavailable, a ratio of 50% net free area to total area is usually a good

rule of thumb. A notable exception to this rule of thumb are ridge vents. The industry standard net free ventilation

area for ridge vents is 13% of the vent’s length in feet.

Since most attics have multiple vents, often of dierent types, it is necessary to count each vent, noting its type

and size. Apply the appropriate ratio to the dimensions of each vent to nd its net free area, and sum these

values to nd the attic’s total ventilation. An example of how these calculations are made is given in the

table below:

Vent Type Dimensions Total Area

Net Free Area Ratio

(“NFA”)

Net Free Ventilation Area

(=Total Area x NFA)

Two Louvers 24” x 24” 24” x 24”/ 144 = 4 ft.250% 2 x 4 ft.2x .50 = 4 ft.2

Ridge 32 feet n/a 13% 32 feet x .13 = 4.16 ft.2

Round Sot 10” diameter 3.14 x 5” x 5” / 144 = .55 ft.250% .55 ft.2 x .50 = 0.28 ft.2

Total Net Free Ventilation Area: 8.44 ft.2

Please consult a roong professional if the attic’s net free ventilation area remains uncertain. Additional ventilation

may be required for proper operation of the fan system.

P/N 780102000 07/20 Rev F

Refer to specication table for required minimum Open Window Ventilation Area in square feet when operating

whole house fan. Without adequate Open Window Ventilation Area, the quantity of cooler air pulled into the home

to be exhausted to the attic may substantially reduce the fans overall performance.

page 6 of 20

• Locate this fan in a central location, away from windows that will be opened during

its operation. Installing this fan centrally promotes an even replacement of air through-

out the home, and the longer the path of air travels from an open window to the fan,

the greater the cooling eect.

• The damper provided with this fan can only be installed in a horizontal orientation,

thereby requiring the unit to be installed in the ceiling.

• Locate this fan at the highest point possible. This exploits natural convection and helps

the fan exhaust the hottest indoor air from the home.

• Typically, the ideal location for this fan in a two-story home is in the open area at the

top of the stairs.

• Avoid locating this fan in a narrow space or over hard ooring as sound reecting o

of hard surfaces can amplify its perceived noise.

• Even though the Tahoe series fan systems are engineered to be extremely quiet, we

specically recommend against installing it in a bedroom as humans’ perception of

noise is far greater when the surrounding environment is quiet (such as within a bed-

room at night).

By running this fan through the night, homeowners can extract the maximum possible amount of heat from their

home’s structure and contents. This essentially “pre-cools” the home ahead of the rise in temperature the next

day, which can reduce or even eliminate the need for air conditioning. This VentCool Whole House Fan has

been designed specically for quiet and ecient operation. As such, we strongly recommend homeowners run

this fan through the night to reduce their energy expense.

With these principles of operation in mind, adhere to the following guidelines when choosing a location for

this fan:

WHERE TO LOCATE THIS FAN

The best location for this fan is determined by an under-

standing of its theory of operation: As a home heats up

during the day, a large amount of heat is retained in its

structure and contents. These materials give up their heat

slowly and, in doing so, continue to heat the home’s inte-

rior even though the outdoor temperature may, in fact, be

very comfortable in the evening and at night. Thus, home-

owners are forced to either endure the hot conditions in-

side of their homes or turn on their air conditioners and

bear the expense thereof.

When operated properly, this whole house fan can resolve

this dilemma by forcing the hot air inside a home out and

drawing cool air from outside in. The illustration to the right

depicts how this fan exhausts hot air into the attic and

draws cool air into the house from outdoors through open

windows and/or doors.

P/N 780102000 07/20 Rev F

page 7 of 20

The ideal orientation of unit’s gravity damper is in a level position. If necessary, however, the damper can be in-

stalled at a slight angle. TIP: before beginning the installation, make sure that the fan assembly is undamaged,

and that the fan blade rotates freely. Brace or clamp the fan assembly to a secure object, and temporarily plug

in the fan’s power cord into a grounded power outlet to verify smooth and correct operation.

Be aware that the fan is quite powerful and will draw in loose objects or de

bris, and will blow dirt, debris

and other objects with force!

Use eye protection when operating the fan to avoid injury from blowing sand or debris! Keep hands and

other objects away from the rotating fan blade!

TIP: Before beginning the installation, verify that the damper assembly is undamaged, and that the damper doors

operate freely, opening and closing fully without binding or restriction.

INSTALLATION: GRAVITY DAMPER

GRAVITY DAMPER ORIENTATION NOTE

1. From consideration of the principles of whole-house fan

operation, determine the best general area for installation

of the gravity damper assembly. The damper assembly is to

be mounted in the attic with its bottom edge opening into

and ush with the ceiling of the living space. The eggcrate

inlet grille is to be mounted on the ceiling of the living

space, covering and engaging with the opening of the

damper assembly.

2. Using the cardboard from the fan system’s packaging, or

other suitable material, make a rectangular template for the

rough opening of the damper assembly to these dimensions

(making sure all sides are at right angles to each other):

a. Tahoe T2 and T3 models: 14-1/4” wide, 22-1/4” long

b. Tahoe T4 and T5 models: 14-1/4” wide, 30-1/4”long FIGURE 1 - TEMPLATE

3. Take the template into the attic, above the general area for installation, and determine the exact desired

location for the rough opening for installation of the damper assembly. There must be at least 36” of

vertical clearance above the damper assembly location, and the damper assembly must be fastened to

secure framing (ceiling joist, roof truss, or additional framing) along at least one long side or both short

sides of the damper assembly! Add additional framing as required to support the weight of the damper

assembly and duct.

a. For existing construction, the anges surrounding the opening of the damper assembly may be

removed for clearance (as with 16” on-center framing) and/or to allow the side or sides of the

damper assembly to make direct contact with the framing used to support the damper assembly.

Leave anges in place if they will not be fastened to framing, if possible. Additional framing

may be added after the damper assembly is placed into the rough opening, so the anges can

remain in place if space allows.

b. For new construction, before the ceiling drywall is hung, frame in a rough opening for

installation of the damper assembly from below. Leave the assembly anges in place and

simply attach the damper assembly to the bottom of the framing using appropriate fasteners

installed through the anges. Skip all following steps regarding cutting the rough opening

into the ceiling and proceed with installation of the duct and fan assembly.

P/N 780102000 07/20 Rev F

page 8 of 20

7. Using a drywall saw or other appropriate device, carefully cut out the rough opening into the ceiling. Use

care to avoid damaging the surrounding areas of the ceiling that will not be covered by the edges of the

eggcrate inlet grille.

8. Place the fan assembly, exible duct, and damper assembly in the attic space. If necessary, the fan and

damper assemblies may be passed through the rough opening into the attic. It may be necessary to

detach the exible duct from the fan assembly to allow passage of the fan and duct into the attic space. It is

recommended to pre-attach the ex ductwork to fan assembly prior to placing unit in attic.

9. Move the damper assembly into place in the rough opening, with the bottom edge of the assembly

protruding into the opening. If more than two anges were removed from the damper assembly for

installation clearance, make sure that the bottom edge of the damper assembly does not protrude below

the surface of the ceiling.

10. Attach the damper assembly to the framing by installing drywall screws (as supplied) or wood screws

through the inside wall(s) of the damper assembly into the framing. If addition framing is to be added, place

the framing over the damper assembly anges and fasten in place.

If using fasteners long enough to penetrate through the framing, use extreme caution

to avoid drilling into

hidden wiring, plumbing, or other building elements of concern!

11. From below, install drywall screws through the ceiling and through the anges of the damper assembly, and

into any addition framing positioned above the anges. Use care to avoid installing screws outside of the area

that will be covered by the eggcrate inlet grille!

12. Hold the eggcrate grille in position on the ceiling, and install the included white screws through the holes in the

ange of the grille, through the ceiling, and into the damper assembly anges and/or framing above.

Make sure that the eggcrate grille mounting screws penetrate into either the damper box anges or framing

above, and that the grille is securely fastened in place!

FIGURE 2 - DAMPER BOX INSTALLATION

4. Make sure that the exact location chosen

for the rough opening will allow installation

of the eggcrate inlet grille, and will not

interfere with any lighting xtures, smoke

alarms, or other objects installed in the

ceiling.

5. Remove any insulation from the area of

the exact chosen location, and make sure

that no wiring, plumbing, bracing or other

building elements will interfere with the

damper assembly installation.

6. With the template laying on top of the

ceiling in the exact chosen location, mark the

outline of the template onto the ceiling. If the

ceiling hole is to be cut from below, drill or

punch a small hole at each corner of the tem-

plate, and mark the outline of the template

from below the ceiling.

P/N 780102000 07/20 Rev F

page 9 of 20

INSTALLATION: FAN & DUCT

NOTES:

• The fan assembly must be soundly supported by attachment to structurally sound framing. Provide

additional framing with minimum 2-by-4 lumber as needed for fan support.

• The fan assembly should be positioned with at least 24” of free space in front of the fan, for air to be freely

blown into the attic by the fan.

• Position the fan with a slight upward angle and in a direction minimizing disturbance to attic insulation.

• The acoustical duct should be installed with a gentle bend of close to 90 degrees, from vertical to nearly

horizontal, to minimize fan sound inside the living space. It must not be kinked or bent sharply, especially

where leading into the fan.

• The acoustical duct must be installed with the air ow direction arrow (as marked on the duct) pointing

downstream (towards the fan).

1. Lay the fan assembly on top of the ceiling

joists, within a few feet of the damper assembly

and underneath the area where the fan will be

suspended in place.

2. Rotate and brace the fan assembly so that the

electrical handy-box on the fan is in the 12-o’clock

position (on the top of the fan). This is important

to avoid twisting the duct, while having the fan’s

electrical handy-box within the 10- to 2-o’clock

position once installed.

3. Adjust the exible duct collar on the upstream end

of the duct to be as loose as possible. Squeeze

and position the exible acoustic duct collar over

the oval-shaped collar on the damper box, and attach

using 3 of the screws provided, or other suitable

screws. Note that twisting the duct will cause the

fan to try to roll out of position. Seal the joint with

approved duct tape, mastic, or other approved means.

4. Lift and support the fan assembly into position beneath the rafters, truss structure or other framing to be

used to support the fan, with the electrical handy box at approximately the twelve-o-clock position.

Attach both ends of the metal fan support strap to the framing using a minimum of two screws for each

end of the strap. 1” drywall screws and large washers are supplied; other fasteners of appropriate

strength may also be used.

5. Using the black woven poly strapping, support the acoustic ex duct by attaching the strapping to

attic framing as shown. Fold each end over a large washer 2-3 times and fasten to the framing by driving

the supplied 1” drywall screws or other appropriate fasteners through the washer and into the framing.

The strapping may be cut to length with ordinary scissors if desired.

6. Replace the insulation around and over the damper assembly. Additional insulation may be added to

further reduce heat transfer and fan noised from the attic to the living space.

FIGURE 3: FAN & DUCT STRAPS DETAIL

P/N 780102000 07/20 Rev F

page 10 of 20

INSTALLATION: WIRING & CONTROLS

The VentCool PSC Tahoe Series Whole-House Fan Systems require a 115 volt electrical power supply of

minimum 15A ampacity and maximum 15 Amp circuit overcurrent protection.

All electrical components, whether included with the VentCool system or supplied by others, must be rated

for the fan system’s electrical load requirements; please refer to the VentCool Tahoe Series specications

table for the electrical load requirements of the specic model to be installed.

All wiring and connections must be made according to this manual and all applicable electrical wiring

codes and standards. All applicable electrical codes must be followed to the satisfaction of the local

authority having jurisdiction.

A dedicated circuit is strongly recommended for this fan system.

P/N 780102000 07/20 Rev F

STANDARD WHF WALL CONTROLL INSTALLATION USING WTT PRODUCT

1. Install a dedicated 115VAC, 15 amp power outlet with in 15 foot of fan assembly

location. Verify power voltage and terminal orientation.

2. In living area (upstairs living space), install a PLASTIC RETROFIT SINGLE GANG BOX

roughly 5 feet o the oor for the whole house fan wall controller to be mounted in

(Refer to FIGURE 4).

DO NOT INSTALL METAL GANG BOX.

Select a location that will

best sense the temperature for the living space. Do not install box in a location

where the temperature will be inuenced such as in direct sunlight, on an exterior

wall, etc…

Note:

Note: The wall controller kit comes standard with 50 feet of cable to connect

between plastic box and the fan assembly. The maximum allowable cable

length is 100 feet using a connector and two 50 foot cables. Contact Field

Controls to purchase additional 50 foot cable and connector, if necessary.

FIGURE 4 - PLASTIC

RETROFIT GANG BOX

FIGURE 5 - PLUG CABLE TO FAN CONTROL MODULE

3. Route the 50 foot plug&play cable between the plastic box and fan assembly. Refer to DIAGRAM 1 for cable

connections. Plug the cable into the fan assembly fan control module (FC3JF) (Refer to FIGURE 5). Extend the

cable out of the plastic retrot box (refer to FIGURE 6).

FIGURE 6 - EXTEND CABLE

The Ventcool Tahoe series whole house fan is supplied pre-wired with fan control module (FC3JF) installed

on fan assembly. Refer to Diagram 1 for the interconnection cable diagram. Refer to Diagram 2 for the fan

assembly electrical wiring diagram.

page 11 of 20

4. Connect the cable to the wall control (WTT). Plug the cable into the “RED” RJ12 Connector on the back

side of WTT. Refer to FIGURE 7 and DIAGRAM 1 for cable connections.

5. Attach the wall control (WTT) and cover plate to the plastic retrot box (refer to FIGURE 8).

FIGURE 7 - PLUG CABLE TO WALL CONTROL FIGURE 8 - ATTACH WALL

CONTROL AND COVER PLATE

6. Verify the number of fan speeds is set to two (2) speed operation on the wall control (WTT) to match2

speed motor.

Note:

The wall control (WTT) is factory set for two (2) speed motor operation from the factory.

a. Apply 115VAC power to fan assembly. The LCD on the wall control will lite up indicating power is

applied to the system and cable interconnections are made.

b. Press and hold the MODE button for about 7 seconds until STimer is displayed.

i. Press and hold the MODE button again to display the number of speeds.

ii. Press and hold the ARROW UP or ARROW DOWN button to increase/decrease # of fan

speed to 2 speeds.

FIGURE 9 - WALL CONTROL WITH PLATE

FUNCTIONAL SYSTEM CHECK

1. Verify fan power cord is plugged into dedicated 115VAC,

15 AMP outlet.

2. Turn ON dedicated fan assembly power outlet. LCD on

wall control should lite up.

3. Verify fan blade rotation.

a. Press

ON/OFF

ON/OFF button on WTT to start whole house

fan assembly.

b. Listen for fan to start.

4. Verify wall control is set to two (2) speed motor

operation. Refer to item 6 in Installation: Wiring and

Controls section to verify/modify number of fan speeds.

5. Return wall control to Temperature Control

a. Press

MODE

MODE button on WTT then press

DOWN

ARROW

ARROW button to select

TEMPERATURE CONTROL.

6. Press

ON/OFF

ON/OFF button on WTT to turn o the whole

house fan, if fan is still running.

P/N 780102000 07/20 Rev F

page 12 of 20

DIAGRAM 1: For T2-T5 Models with 2 Speed Wall Control (WTT) and Fan Motor Control (FC3JF)

DIAGRAM 2: For T2-T5 Models Fan Motor Wiring

P/N 780102000 07/20 Rev F

P/N: 780302502 RevA P/N: 780302504 RevB

page 13 of 20 P/N 780102000 07/20 Rev F

FIGURE 10 : STANDARD WALL CONTROL SYSTEM

(SPEED TEMPERATURE OR TIME)

OPERATION

Before starting this fan for the rst time, verify that:

• All wiring and connection have been made according to this manual and all applicable wiring codes and

standards.

• No tools or construction debris have been left in, on or around the fan.

• Dedicated 115VAC, 15 AMP power outlet has been properly installed and plug terminal outlet orientation is

correct.

• Wall control is installed properly. Plug&Play cable is installed and connected properly between wall control and

fan assembly.

• Open windows to allow for outside air to enter space.

• Verify that Functional Check in INSTALLATION:

WIRING & CONTROLS

section has been completed prior to home

owner use.

• Verify grille is installed below damper assembly.

1. Verify fan power cord is plugged into dedicated 115VAC, 15 AMP outlet.

2. Turn ON dedicated fan assembly power outlet. LCD on wall control should lite up.

3. Press

ON/OFF

ON/OFF button on WTT to turn ON the whole house fan.

The wall control can operate in two dierent modes of operation: Temperature or Timer Control

Temperature control will allow the homeowner to set the indoor temperature at which the whole house fan system

will turn o once temperature is reached. Timer control will allow the homeowner to set how much time in hours

the whole house fan will operate before turning o.

page 14 of 20

Switching wall control between Temperature and Timer Control Modes:

1. Switch wall control to Temperature Control from Timer Control mode:

a. Press

MODE

MODE button on WTT then press

DOWN ARROW

DOWN ARROW button to select

TEMPERATURE CONTROL.

2. Switch wall control to Timer Control from Temperature Control mode:

a. Press

MODE

MODE button on WTT then press

UP ARROW

UP ARROW button to select

TIMER CONTROL.

FIGURE 11- WTT DISPLAY IN

TEMPERATURE CONTROL MODE

FIGURE 12- WTT DISPLAY IN

TIMER CONTROL MODE

Temperature Control Mode:

Temperature Control Mode: (refer to FIGURE 11)

Turn the FAN ON:

By pressing

ON/OFF

ON/OFF button. The fan will run until the indoor temperature drops below the

Set To

Temperature

on the WTT display. By pressing the

ON/OFF

ON/OFF button while fan is operating will turn the

fan OFF.

Adjusting the Temperature:

Press and hold the

ARROW UP

ARROW UP or

ARROW DOWN

ARROW DOWN buttons individually to change the

Set To

Temperature

setting.

When the

Set To Temperature

is lower than the indoor temperature, the fan is ON and running (ON

is blinking). When the

Set To Temperature

is above the indoor temperature, the fan is not running

and ON is not blinking.

Safety Feature in Temperature Control Mode:

Safety Feature in Temperature Control Mode: The WTT

ON/OFF

ON/OFF button is pressed to turn the fan ON.

In addition, the WTT has a built-in safety timer that will automatically turn the fan OFF after 8 hours

of continuous operation in case the homeowner forgets the fan is running.

Adjust the Safety Feature Timer Hour Setting:

Press and hold

MODE

MODE button for about 7 seconds until STimer is displayed. Press the

ARROW UP

ARROW UP or

ARROW DOWN

ARROW DOWN button to adjust the safety timer hours from 1 to 12 hours.

Adjusting Speed Control Setting:

Press the SPEED button then press the

ARROW UP

ARROW UP or

ARROW DOWN

ARROW DOWN button to adjust the fan speed.

Timer Control Mode:

Timer Control Mode: (refer to FIGURE 12)

Switch wall control to Timer Mode.

Turn the FAN ON:

By pressing

ON/OFF

ON/OFF button. The fan will run for Timer Interval on WTT display. By pressing the

ON/

OFF

OFF button while fan is operating will turn the fan OFF.

P/N 780102000 07/20 Rev F

page 15 of 20

IMPORTANT OPERATING TIPS

The following important tips for operating this fan have also been provided.

• NEVER operate this fan without also opening a window or door. Doing so can excessively depressurize the

home.

• Only operate this fan when the outdoor air temperature is cooler than the indoor temperature.

• Make sure the home’s air conditioner and furnace are OFF before turning on this fan. Running either of

these together with this whole house fan wastes money because the fan will force expensively conditioned

or heated air out of the home.

• We recommend running this fan through the night. The goal of using a whole house fan is to cool the entire

home, not just the air inside it. Once heated, the home’s structure and contents continue to radiate heat

until reaching the temperature of the surrounding air. Running this fan through the night speeds up this cool

ing process and can then further “pre-cool” the home, reducing or eliminating the need to use air conditioning

the next day.

• If the home has a basement, extra cooling can be achieved by drawing in air through the basement

windows.

• This fan’s cooling eect can be increased or concentrated in particular areas by adjusting the location of

open windows. Visualize the path air will travel from the windows to your fan’s opening. Generally, the

longer the path, the more cooling.

Adjusting the Timer Setting:

Press and hold the

ARROW UP

ARROW UP or

ARROW DOWN

ARROW DOWN buttons individually to adjust current

Timer Interval

setting.

Note: If fan is operating, the new

T

imer Interval

setting adjustment is temporary. Once time period times

out, Timer Interval will revert back to original

Timer Interval

setting. But if fan is OFF and you adjust the

Timer Interval

, the new

Timer Interval

is saved as the permanent setting.

Adjusting Speed Control Setting:

Press the

SPEED

SPEED button then press the

ARROW UP

ARROW UP or

ARROW DOWN

ARROW DOWN button to adjust the fan speed.

P/N 780102000 07/20 Rev F

page 16 of 20

P/N 780102000 07/20 Rev F

Speed Settings: 3 (OFF/LOW/HIGH) - 2 Speed Motors

Gravity Damper Rough

Opening Dimensions:

T2 & T3: 14.3 inches X 22.3 inches

T4 & T5: 14.3 inches X 30.3 inches

Grille Construction: Aluminum Cube Core, Steel frame with White Powder Coat

Fan Diameter: T2, T3: 18.75 inches

T4: 20.75 inches

T5: 22.75 inches

Duct Length: 7 feet

Duct Diameter: T2: 16 inches

T3: 18 inches

T4 & T5: 20 inches

Electrical: 115VAC, 60 Hz, 15 Amp dedicated power

Fan Motor: (HP/FLA) T2: 1/3 HP / 4.9

T3: 1/3 HP /4.9

T4: 1/2 HP / 6.5

T5: 1/2 HP / 6.5

Damper Door Insulation: R5 (compiled)

Installation: Installs easily on 24 inches or 16 inches O.C. framing

Attic Net Free Ventilation Area (Sq ft) ** T2: 3.86

T3: 5.52

T4: 7.28

T5: 8.25

Open Window Ventilation Area (Sq ft)** T2: 7.73

T3: 11.04

T4: 14.56

T5: 16.49

SPECIFICATIONS*

*Due to our continual product improvement eorts, performance ratings and specications are subject to change without notice.

**Attic Net Free Ventilation and Open Window Ventilation Areas are listed as minimum requirements.

Actual lower ventilation areas may reduce fans overall performance at high speeds.

MAINTENANCE & TROUBLESHOOTING

Make sure the appropriate circuit breaker(s) at the homes’ electrical panel are turned OFF before servicing your

whole house fan product(s).

Verify the fan assembly is securely mounted and straps are not wearing prematurely. Repair and replace as

applicable.

Blocking of fan exhaust can cause it to fail prematurely and/or reduce the amount of air the fan can move. Keep

the area in front of the fan exhaust unobstructed. No object should be closer than 24 inches to the face of the fan

grille.

This fan has been factory tested. If problems are encountered, please take a few moments to run through the fol-

lowing troubleshooting procedures before calling for assistance:

• If the fan does not turn on and wall control (WTT) display is blank, check power to the unit and the

verify that fan power cord is plugged in to active 115VAC outlet.

page 17 of 20

Optional Upgrade Components for Controlling your Ventcool Summit Series Whole House Fan (Generation 4):

Contact Field Controls Sales team for purchasing any of the following optional Upgrade components. These

new products will be available in 2021.

Wireless Remote Control Kit (WLM-RTT)

Wireless Remote Control Kit (WLM-RTT) – p/n: 580011704

The Remote Control Kit is designed to work in conjunction with the wall control (WTT) product. The Remote

Control provides wireless control of the whole house fan from anywhere in the home using the remote con-

trol. The kit includes a wireless plug in module (WLM), remote control (RTT) and set of batteries. The wireless

plug in module connects directly to the backside of wall control (WTT) printed circuit board.

WiFi Plug-In Module (WFM)

– p/n: 580011705

The WiFi Plug-In Module is designed to work in conjunction with the wall control (WTT) product. The WiFi

Plug-In Module provides WiFi control of the whole house fan from anywhere using a smart phone, tablet or

PC. The smart phone, tablet or PC is provided by owner. This control requires access to a wireless network

within the home to communicate with a cloud based program on the smart device. The WiFi plug in module

connects directly to the backside of wall control (WTT) printed circuit board.

WiFi Module (iM3)

WiFi Module (iM3) – p/n: 580011703

The WHF WiFi module is designed to work with the fan control module (FC3JF) installed on the fan assem-

bly. The wall control (WTT) will be disconnected when the WiFi Module (iM3) is installed. The WiFi Module

provides WiFi control of the whole house fan from anywhere using a smart phone, tablet or PC. The smart

phone, tablet or PC is provided by owner. This control requires access to a wireless network within the home

to communicate with a cloud based program on the smart device. The WiFi module connects directly to the

plug & play cable from fan assembly.

P/N 780102000 07/20 Rev F

• If the damper doors ap during operation, verify that appropriate windows are open in the home and

that there is enough attic exhaust free space available. Either or both conditions will reduce whole

house fan performance air ow.

• If the damper doors do not open or close, visually inspect the damper for any debris obstructing their

movement. Inspect fan exhaust for obstruction.

• If Wall Control (WTT) display does not lite up. Verify fan power cord is plugged in to active 115VAC

outlet. Verify 50 foot plug&play cable is completely plugged into fan control module and“red” RJ

connector on back side of wall control device.

• The Wall Control (WTT) display indicates ON but the fan is not running. If ON is blinking and the WTT

is in Temperature Control mode, make sure the Set To Temperature is a few degrees lower than indoor

temperature. ON will blink when the fan is running.

• Fan is running but damper doors are not opening. If you feel some air but not a lot of air where the

damper doors open slightly, verify fan assembly is operating. Check outlet power to fan assembly.

• The Wall Control (WTT) only allows for 1 or 3 speed operation and your system is a 2 speed system.

Refer to Step 6 Set the Number of Fan Speeds in the INSTALLATION: WIRING AND CONTROL section to

change number of fan speeds of the wall control (WTT) device.

If the suggestions above do not work, contact Field Controls technical support at 800.742.8368 or by email

at eldtec@eldcontrols.com for further assistance. Technical manuals are available on our website at

www.eldcontrols.com.

page 18 of 20P/N 780102000 07/20 Rev F

(THIS PAGE LEFT INTENTIONALLY BLANK)

page 19 of 20 P/N 780102000 07/20 Rev F

FIGURE 13: VENTCOOL TAHOE REPLACEMENT PARTS

P/N 780800200, Rev B

This manual may be downloaded and printed from the Field Controls website (www.eldcontrols.com)

WARRANTY

For warranty information about this or any Field Controls product, visit:

www.eldcontrols.com/ventCool

Field Controls Technical Support

1.800.742.8368

eldtec@eldcontrols.com

P/N 780102000 07/20 Rev F

Phone: 252.522.3031 • Fax: 252.522.0214

www.fieldcontrols.com

VentCool Tahoe Series User manual

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