Fantech SE704N User Manual

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Installation, Operation and Maintenance Manual

SH, VH & SE Series

Heat & Energy Recovery Ventilators

Item #: 403165

Rev Date: 2015-05-12

SH 704 • VH 704 • SE 704

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”.

United States

10048 Industrial Blvd., Lenexa, KS, 66215
Tel.: [phone] • Fax: [phone]

Canada

50 Kanalflakt Way, Bouctouche, NB, E4S 3M5
Tel.: [phone] • Fax: [phone]

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.

2

Note Warning/

Important

note

Information Technical

information

Practical tip

PLEASE READ THIS MANUAL BEFORE INSTALLING UNIT

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 Heat Recovery Ventilator using the balancing procedure found in this manual.
It is always important to assess how the operation of any HRV 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.

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Table of content

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

INSTALLATION EXAMPLES

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

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

Simplified installation – Option 1 ...........................................................7

Simplified installation – Option 2 ...........................................................8

EXTERIOR DUCTING INSTALLATION

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

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

INSTALLING DUCTS TO / FROM INSIDE

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

Supply & Exhaust Air Ducting ........................................................... 10

3

HRV INSTALLATION......................................................................... 11

AIRFLOW ADJUSTMENT & BALANCING ...........................................................12

MAINTENANCE .............................................................................13

ELECTRICAL CONNECTIONS................................................................... 15

TROUBLESHOOTING ........................................................................ 17

MAINTENANCE CHART .......................................................................18

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4

Determining your airflow requirement

Room Count Method

1 CFM = 0.47 L/s
1 L/s = 2.13 CFM

ASHRAE method

Room classification Number of rooms CFM (L/s)

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

CFM Required

Ventilation Air requirements

Floor area Bedrooms

0-1 2-3 4-5 6-7 >7

2

Ft

< 1500 <139 30 14 45 21 60 28 75 35 90 42

1501-3000 139.1-279 45 21 60 28 75 35 90 42 105 50

3001-4500 279.1-418 60 28 75 35 90 45 105 50 120 57

4501-6000 418.1-557 75 35 90 42 105 50 120 57 135 64

6001-7500 557.1-697 90 42 105 50 120 57 135 64 150 71

>7500 >697 105 50 120 57 135 64 150 71 165 78

* ASHRAE 62.2-2010 Table 4.1, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings.

2

m

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

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.

4

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Installation examples

5

Example only – duct configuration may differ depending on the model.

FULLY DEDICATED SYSTEM
BEST FOR NEW CONSTRUCTION

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 HRV’s airflow must be balanced after installation using the procedure
found in the section “AIRFLOW BALANCING”

HRV ducting for fully Dedicated System

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.

Stale air from inside

Outside

Fresh air from

outside

Fresh air to living areas

Stale air to

outside

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6

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 HRV is required. The
furnace should be set to run continuously or interlocked with HRV

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 HRV and the equipment it
is being connected to the HRV’s airflow must be balanced on site, using
the procedure found in the section “AIRFLOW BALANCING”

HRV/ Furnace ducting for Partially Dedicated System

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

Outside

Stale air from inside

Fresh air from

outside

1 m (3' 3")

min.

Fresh air

to living

areas

Stale air to

outside

Fantech heat recovery ventilators (HRV) that use a supply fan shutdown for frost prevention do not include an outdoor air motorized damper. If
you are using a simplied installation, i.e. connecting the HRV supply air duct to a furnace's return air duct, the HRV must operate continuously.
When the HRV is turned off, no warm exhaust air will ow through the HRV 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.

* Unit airflow should be balanced while HRV is on
“Normal” speed and furnace blower is running.

recommended

Cold air

return

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