Fantech Fit 120e User manual

FIT®120E

Energy Recovery Ventilators

Item #: 445498

Rev Date: 2020-11-02

Your ventilation system should be installed in conformance with the appropriate provincial requirements or, in the absence of

such requirements, with the current edition of the National Building Code, and / or ASHRAE’s “Good Engineering Practices”.

Fantech reserves the right to modify, at any time and without notice, any or all of its products’ features, designs,

components and specifications to maintain their technological leadership position.

Please visit our website www.fantech.net for more detailed technical information.

United States

10048 Industrial Blvd., Lenexa, KS, 66215

Tel.: 800.747.1762 • Fax: 800.487.9915

Canada

50 Kanalflakt Way, Bouctouche, NB, E4S 3M5

Tel.: 800.565.3548 • Fax: 877.747.8116

PARTS IN THE BOX

Energy Recovery Ventilator Fit120E, 1 pc

Ceiling bracket, 1 pc Angle brackets, 2 pcs

Operation and Installation Manual, 1 pc

Note Warning/

Important

note

Information Technical

information Practical tip

PLEASE READ AND SAVE THESE INSTRUCTIONS

For residential use only

Before installation careful consideration must be given to how this system will operate if connected to

any other piece of mechanical equipment, i.e. a forced air furnace or air handler operating at a higher

static pressure. After installation, the compatibility of the two pieces of equipment must be conrmed by

measuring the airow of the Energy Recovery Ventilator using the balancing procedure found in this manual.

It is always important to assess how the operation of any ERV may interact with vented combustion equipment (i.e.

Gas Furnaces, Oil Furnaces, Wood Stoves, etc.)

Products are designed and manufactured to provide reliable performance, but they are not guaranteed to be 100%

free of defects. Even reliable products will experience occasional failures, and this possibility should be recognized

by the user. If these products are used in a life support ventilation system where failure could result in loss or injury,

the user should provide adequate back-up ventilation, supplementary natural ventilation or failure alarm system, or

acknowledge willingness to accept the risk of such loss or injury.

Your ventilation system should be installed in accordance with the local building code that is in effect, in absence

of such requirements, it is recommenced to check with local authorities having jurisdiction in your area prior to

installing this product.

TABLE OF CONTENTS

DETERMINING YOUR AIRFLOW REQUIREMENT ..................................................... 4

OPERATING CONDITIONS.......................................................................4

INSTALLATION EXAMPLES

Fully dedicated system ................................................................ 5

Partially dedicated system .............................................................. 6

Simplified installation ................................................................. 7

EXTERIOR DUCTING INSTALLATION

Weatherhood Location ................................................................. 9

Installing the ducting to the weatherhood ................................................... 9

INTERIOR DUCTING INSTALLATION

General Tips ........................................................................10

Installing duct to ERV ................................................................ 10

Supply & Exhaust air grilles location ...................................................... 10

ERV INSTALLATION ........................................................................ 11

Mounting ..........................................................................12

AIRFLOW ADJUSTMENT & BALANCING

General preparation ................................................................. 13

Adjusting airflow using integrated balancing system ........................................... 13

Balancing steps .................................................................... 14

LOW VOLTAGE CONTROL SYSTEMS ............................................................. 15

WIRING DIAGRAM ......................................................................... 18

TROUBLESHOOTING .........................................................................20

ERV CORE WASHING INSTRUCTIONS.............................................................21

ERV MAINTENANCE CHART....................................................................22

PARTS LIST ...............................................................................44

Operating conditions

This ventilation system is designed to operate under standard humidity and temperature conditions. However, some extreme conditions may cause the

exchanger to freeze or produce an excessive amount of water condensation. This ventilation system should not be operated with an indoor humidity

above 50% in combination with an outdoor temperature below -10°C (14°F) for more than 12 continuous hours.

Residential ERV ventilation systems are not suitable for pool or spa applications.

Room classification Number of rooms CFM (L/s)

CFM Required

Master bedroom x 10 L/s (20 CFM) =

Basement yes or no =

Bedrooms x 5 L/s (10 CFM) =

Living room x 5 L/s (10 CFM) =

Others x 5 L/s (10 CFM) =

Kitchen x 5 L/s (10 CFM) =

Bathroom x 5 L/s (10 CFM) =

Laundry room x 5 L/s (10 CFM) =

Utility room x 5 L/s (10 CFM) =

Total Ventilation Requirements (add last column ) =

if yes add 10 L/s (20 CFM)

if no = 0

1 CFM = 0.47 L/s

1 L/s = 2.13 CFM

Room Count Method

DETERMINING YOUR AIRFLOW REQUIREMENT

ASHRAE method

Ventilation Air requirements

Floor area Bedrooms

1 2 3 4 5

Ft2m2CFM L/s CFM L/s CFM L/s CFM L/s CFM L/s

<500 <47 30 128 38 18 45 21 53 25 60 28

501-1000 47-93 45 21 53 24 60 28 68 31 75 35

1001-1500 94-139 60 28 68 31 75 35 83 38 90 42

1501-2000 140-186 75 35 83 38 90 42 98 45 105 49

2001-2500 187-232 90 42 98 45 105 49 113 52 120 56

2501-3000 233-279 105 49 113 52 120 56 128 59 135 63

3001-3500 280-325 120 56 128 59 135 63 143 66 150 70

3501-4000 326-372 135 63 143 66 150 70 158 73 165 77

4001-4500 373-418 150 70 158 73 165 77 173 80 180 84

4501-5000 419-465 165 77 173 80 180 84 188 87 195 91

* ASHRAE 62.2-2016 Table 4.1, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings.

Bathroom: If the HRV is going to provide the required local exhaust ventilation for each bathroom with each a continuous 20 CFM

(10 L/s), this ventilation rate can be considered as part of the whole-building ventilation rate.

Installation examples

FULLY DEDICATED SYSTEM

BEST FOR NEW CONSTRUCTION

Stale air is drawn from key areas of home (bathroom, kitchen, laundry)

Fresh air supplied to main living areas

1. Stale air is drawn from key areas of the home requiring local exhaust

(bathroom, kitchen, laundry room).

2. Fresh air is distributed directly to habitable rooms in the house

(bedrooms, living room)

3. The ERV’s airflow must be balanced after installation using the procedure

found in the section “AIRFLOW BALANCING”

Suggested installation for:

• Hydronic baseboard

• Inoor heating

• Electric baseboard

• Mini split heat pump

Benets: Provides the best

fresh air distribution in the

house; lowest operation cost

since the furnace/air handler

unit is not needed.

Air from inside

* Unit air flow should be balanced while ERV is on "Normal" speed and

furnace blower is running.

* Ductwork layout may

differ depending on model

Stale air to

outside

Fresh air from

outside

Fresh air to

living areas

ERV/Furnace ducting for Partially Dedicated System

Air from inside

* Unit air flow should be balanced while ERV is on "Normal" speed and

furnace blower is running.

Air return

1 m (3' 3")

min.

recommended

Cold air

return

* Ductwork layout may

differ depending on model

Installation examples (Cont'd)

DIRECT CONNECTION of the FRESH air to living area to the RETURN PLENUM

of the AIR HANDLER (Stale air drawn from key areas of home)

PARTIALLY DEDICATED SYSTEM (BETTER)

1. Furnace blower must operate when ventilation from ERV is required. The

furnace should be set to run continuously or interlocked with ERV . See

furnace electrical connection on page 19.

2. Stale air is drawn from key areas of the home (bathroom, kitchen, laundry

room).

3. Fresh air is supplied to the return air plenum of the furnace.

4. Due to the difference in pressure between the ERV and the equipment it is

being connected to the ERV’s airflow must be balanced on site, using the

procedure found in the section “AIRFLOW BALANCING”

* In the case of a multi-zone system, please contact Fantech customer

service prior to installing any installation type requiring the use of the

furnace interlock"

Stale air to

outside

Fresh air from

outside

Fresh air to

living areas

Fantech energy recovery ventilators (ERV) that use a supply fan shutdown for frost preven-

tion do not include an outdoor air motorized damper. If you are using a simplied instal-

lation, i.e. connecting the ERV supply air duct to a furnace's return air duct, the ERV must

operate continuously. When the ERV is turned off, no warm exhaust air will ow through

the ERV but the furnace's fan will continue to draw in outdoor air directly into the furnace.

If it's cold outside, cold air will be introduced, without re-heating, directly into the furnace.

If the ERV is installed such that the homeowner may turn off the ERV during the winter, we

recommend installing a motorized damper between the ERV's supply air and the furnace's

return air duct that closes when the ERV is not operating. See wiring diagram (gure 1).

Damper

Motor

24 VAC Transformer

COM NO

ERV Furnace interlock

See page 18.

24V

120V

Figure 1

*Transformer and Damper motor not included

Suggested installation for:

• Central furnace (air

handling unit or central air

conditioners)

• When ducting fresh air to

living area is not possible

or practical, i.e. expensive

or when the central AHU

will operate year-round.

Benets: Conditions the

fresh air prior to

distributing it throughout the

house

ERV/Furnace ducting for Simplified Installation - Option 1

Installation examples (Cont'd)

DIRECT CONNECTION of both the ERV SUPPLY AIR STREAM and EXHAUST AIR STREAM

to the FURNACE COLD AIR RETURN

SIMPLIFIED INSTALLATION (GOOD)

(RETURN/RETURN METHOD) - OPTION 1

1. Furnace blower must operate when ventilation from ERV is required. The

furnace should be set to run continuously or interlocked with ERV. See

furnace electrical connection on page 19.

2. A minimum separation of 1m (3`3’’) is recommended between the two

direct connections.

3. In order to prevent exhausting any fresh air, the ERV’s exhaust air connection

should be upstream of the ERV’s supply air connection when ducting to the

furnace’s cold air return.