Lifebreath RNC155, RNC20, RNC10, RNC120D, RNC5-TPD User Manual

TI-RNC

0108

Residential Heat Recovery Ventilators (HRV)

Manufactured with

2 Speed RNC Electronics

Installation Instructions for Heat Recovery Ventilators with 2 Speed RNC Electronics

RNC Series

Models

RNC95

RNC155

RNC200

RNC10

RNC20

RNC120D

RNC5-TPD

Introduction.........................................................................2

Engineering Data - RNC95 .............................................3-4

Engineering Data - RNC155...............................................5

Engineering Data - RNC200...............................................6

Engineering Data - RNC10.................................................7

Engineering Data - RNC20.................................................8

Engineering Data - RNC5-TPD..........................................9

Engineering Data - RNC120D ....................................10-11

Remote Control Devices...................................................12

Locating and Suspending the HRV ..................................13

Locating and Suspending the RNC120D..........................14

Drain Connection..............................................................15

Installation Methods .........................................................16

Simplified Installation ......................................................17

Partially Dedicated Installation.........................................18

Fully Dedicated Installation..............................................19

Grilles and Weatherhoods.................................................20

Electrical ...........................................................................21

Changing OFF to Standby/

Increasing Low Speed to Medium....................................21

Mode DIP Switch Settings................................................21

Wiring the Controls ..........................................................22

Defrost Operation .............................................................23

Defrost Cycle DIP Switch Settings...................................23

Air Flow Balancing .....................................................24-27

Interlocking HRV Operation to an

Air Handler/Furnace Blower ............................................28

Wiring Diagrams .........................................................29-31

Troubleshooting................................................................32

Maintenance......................................................................33

The Lifebreath HRV (Heat Recovery Ventilator) is designed to
introduce fresh outdoor air into a building while exhausting an
equal amount of stale indoor air.

During the heating season, heat energy from the stale
exhausting air is transferred to the fresh, incoming air via
Lifebreath's patented aluminum core.

During the air conditioning season, the HRV will help cool the
incoming fresh air with the cooler stale exhausting air.

RNC electronics offers standard 2-speed operation of low/high.
There is also an installer selectable 2-speed operation of
medium low/high (refer to "Increasing Low Speed to Medium
Low" in this manual).

The RNC circuit board also includes an interlock relay which is
used to Interlock the HRV to an Air Handler/Furnace. Refer to
"Interlocking HRV Operation to an Air Handler/Furnace
Blower" in this manual.

We recommend using one of the Optional Main Controls (refer
to "Remote Control Devices" in this manual) for normal
operation.

2

Table of Contents Introduction

RNC Electronics

Leave this Manual for the Homeowner

TO BE COMPLETED BY CONTRACTOR AFTER INSTALLATION

Installing Contractor _________________________________________Telephone / Contact _____________________

Serial Number______________________________________________Installation Date ________________________

Model _________________________________________________________________________________________

IMPORTANT

Please read this manual before

installing the HRV

(Heat Recovery Ventilator).

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.
After installation, the compatibility of the two pieces of
equipment must be confirmed by measuring the
airflows of the HRV (Heat Recovery Ventilator) by
using the balancing procedure found in this manual.
NEVER install a ventilator in a situation where its
normal operation, lack of operation or partial failure
may result in the backdrafting or improper functioning
of vented combustion equipment.

NOTE

Due to ongoing research and product development,
specifications, ratings and dimensions are subject to change
without notice.

CAUTION

3

SP-RNC95

DIMENSIONS
RNC95

inches (mm)

All units conform to CSA and UL standards

Date: _______________________________________________

Tag: __________________________Qty:__________________

Project: _____________________________________________

Engineer:____________________________________________

Contractor: __________________________________________

Supplier: ____________________________________________

Quote#: _____________________________________________

Submitted by: ________________________________________

*Sensible Efficiency – thermal **Latent Efficiency – moisture

Note: Effectiveness - based on temp. differential between the 2 airstreams
Efficiency – takes into account all power inputs

Performance (HVI certified)

Net supply air flow in cfm (L/s) against external static pressure

E.S.P

(external static pressure) [cfm (L/s)]

@ 0.1" (25 Pa) 76 (36)

@ 0.2" (50 Pa) 73 (34)

@ 0.3" (75 Pa) 70 (33)

@ 0.4" (100 Pa) 66 (31)

@ 0.5" (125 Pa) 60 (29)

Max. Temperature Recovery 88%

Sensible Effectiveness
@ 60 cfm (28 L/s) 32°F (0°C) 88%

*Sensible Efficiency
@ 60 cfm (28 L/s) 32°F (0°C) 75%

*Sensible Efficiency
@ 61 cfm (29 L/s) -13°F (-25°C) 68%

VAC @ 60HZ 120

WATTS / Low speed. 60

WATTS / High speed 150

Amp rating 0.9

5 - High Speed

Engineering Data - HRV Model RNC95

THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE

The cross-flow heat recovery core transfers heat between the two airstreams. It is easily removed for
cleaning or service.

MOTORS AND BLOWERS

Each air stream has one centrifugal blower driven by a common PSC motor. 2 speed fan operation.

FILTERS

Washable air filters in exhaust and supply air streams.

MOUNTING THE HRV

Four threaded inserts at corners of the cabinet designed to accept PVC reinforced polyester straps that are
supplied with the unit.

DEFROST

Recirculating defrost system.

CASE

Twenty gauge prepainted galvanized steel (G60) for superior corrosion resistance. Insulated to prevent
exterior condensation.
Drain connections 2 - 1/2" (12 mm) OD.

WEIGHT 52 lbs. (23.6 kg) Shipping Weight 56 lbs. (25.4 kg)

CONTROLS - HRV System Control

HRV defaults to LOW SPEED when plugged in. HIGH SPEED option is accessible by connecting remote
controls to designated terminals inside electrical box of HRV.

Standard LOW SPEED SETTING can be increased to medium low.
Off (Standby)/Low or OFF/HIGH speed operation is also available.

OPTIONAL MAIN CONTROLS (only one main control can be installed on the system)
99-116 Dehumidistat Ventilation Control - Dehumidistat Dial, ON/OFF Switch and

LOW/HIGH Switch (3 wire) 20 gauge wire (min.) 100' length (max.)

99-2040 20/40 ON/OFF Dehumidistat - Dehumidistat Dial, ON/OFF Switch and 20/40 Switch.

The 20/40 Switch will toggle from continuous low speed ventilation to intermittent low
speed ventilation of 20 minutes fan ON and 40 minutes fan OFF. (4 wire) 20 gauge wire
(min.) 100' length (max.)

99-RECIRC Recirculation Control - Dehumidistat Dial, ON/OFF Switch and Recirculation Switch.

The Recirculation Switch will toggle from continuous low speed ventilation to
continuous low speed recirculation. (4 wire) 20 gauge wire (min.) 100' length (max.)

99-130 Remote Dehumidistat - Dehumidistat Dial only. (2 wire) 20 gauge wire (min.) 100'

length (max.)

OPTIONAL TIMERS

99-132 20 Minute Fan Timer - initiates high speed ventilation for 20 minutes. (3 wire) 20 gauge

wire (min.) 100’ length

99-104 Digital Electronic Timer- initiates high speed ventilation for 20, 40 or 60 minutes, (3

wire) 20 gauge wire (min.) 100' length

99-101 60 Minute Crank Timer - initiates high speed ventilation for up to 60 minutes, (2 wire)

20 gauge wire (min.) 100' length (max.)

WARRANTY

Units carry a lifetime warranty on the heat recovery core and a 5 year replacement parts warranty.

80

5

75

70

65

Air Flow (c fm)

60

55

50

0 0.10.20.30.40.50.6

Static Pressure (in w.g.)

24.5"

18.5"

(470 mm)

(622 mm)

FRONT TOP

Heat Recovery

Drain Pan

Drain spout

side mounting of

EXHAUST return port

6" round collar

converted to oval

Removable

Core

knockout for

minimum

18 inches (459 mm)

required for

service access

SIDE

Hanging

straps (4)

16"

(406 mm)

Threaded
inserts (4)
at corners

SUPPLY

Fresh air

from outside

5" round collar

SUPPLY

Fresh air

to building

6" round

(conv. to oval)

collar

18.5"

(470 mm)

EXHAUST

Stale Air

to outside

5" round collar

EXHAUST

Return air

from building

Choice of port location

Knockouts on top and
side of unit (use 1 only)
6" round (conv. to oval)

collar supplied

4

RNC95 Specifications

The RNC95 HRV (Heat Recovery Ventilator) has been designed
to allow the installer to choose between two possible positions
on the cabinet for the Stale Air Exhaust (from building) port.
Illustrations in this manual show standard (side mounted) port
location. The same specifications apply to both RNC95 setups,
regardless of which port position is selected.

Variable Port Location / Installation
(Model RNC95 only)

The exhaust return port collar is not factory installed. Installer
may choose either side mounted or alternate top mounted port
by simply removing one of the two knock-out plates and
attaching a port collar (supplied). To remove knock-out plate,
insert a utility knife into the knock-out slits and trace them
completely to puncture protective film underneath. Then, cut the
solid tabs between the slits, using tin snips or side cutters, and
remove the knock-out plate. If any protective film still blocks
the opening, remove it now.

In order to make the RNC95 as space efficient as possible, the
INDOOR supply and return ports are converted from round to
oval shape. Overall size of the port remains the same. Simply
bend a standard duct fitting to the correct shape, and attach to
the oval port using the same method as for a round port.

RNC95 Air Flow

Stale air enters the FRONT RIGHT side port. The air will pass
down the front half of the core, then up the back half of the core
and out the RIGHT REAR port.

Fresh outdoor air will enter the LEFT REAR port and pass down
the back half of the core. It will then pass up the front half of the
core, and out the LEFT FRONT port.

SIDE MOUNTED PORT TOP MOUNTED PORT

standard location alternate location

Round port bent to oval

Port Configuration and Airflow Model RNC95

5

Engineering Data - HRV Model RNC155

THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE

The cross-flow heat recovery core transfers heat between the two air streams.
It is easily removed for cleaning or service.

MOTORS AND BLOWERS

Each air stream has one centrifugal blower driven by a common PSC motor. 2 speed fan operation.

FILTERS

Washable air filters in exhaust and supply air streams.

MOUNTING THE HRV

Four threaded inserts at corners of case designed to accept four reinforced polyester straps that are
supplied with the unit.

DEFROST

Recirculating damper defrost system.

CASE

Twenty gauge prepainted galvanized steel (G60) for superior corrosion resistance. Insulated to prevent
exterior condensation. Drain connections two - 1/2" (12mm) OD.

WEIGHT 71 lbs. (32.5 kg) SHIPPING WEIGHT 73 lbs. (33.5 kg)

CONTROLS - HRV System Control

HRV defaults to LOW SPEED when plugged in. HIGH SPEED option is accessible by connecting remote
controls to designated terminals inside electrical box of HRV.

Standard LOW SPEED SETTING can be increased to medium low.
Off (Standby)/Low or OFF/HIGH speed operation is also available.

OPTIONAL MAIN CONTROLS (only one main control can be installed on the system)

99-116 Dehumidistat Ventilation Control - Dehumidistat Dial, ON/OFF Switch and

LOW/HIGH Switch (3 wire) 20 gauge wire (min.) 100' length (max.)

99-2040 20/40 ON/OFF Dehumidistat - Dehumidistat Dial, ON/OFF Switch and 20/40 Switch.

The 20/40 Switch will toggle from continuous low speed ventilation to intermittent low
speed ventilation of 20 minutes fan ON and 40 minutes fan OFF. (4 wire) 20 gauge wire
(min.) 100' length (max.)

99-RECIRC Recirculation Control - Dehumidistat Dial, ON/OFF Switch and Recirculation Switch.

The Recirculation Switch will toggle from continuous low speed ventilation to continuous
low speed recirculation. (4 wire) 20 gauge wire (min.) 100' length (max.)

99-130 Remote Dehumidistat - Dehumidistat Dial only. (2 wire) 20 gauge wire (min.) 100'

length (max.)

OPTIONAL TIMERS

99-132 20 Minute Fan Timer - initiates high speed ventilation for 20 minutes. (3 wire) 20 gauge

wire (min.) 100’ length

99-104 Digital Electronic Timer- initiates high speed ventilation for 20, 40 or 60 minutes, (3

wire) 20 gauge wire (min.) 100' length

99-101 60 Minute Crank Timer - initiates high speed ventilation for up to 60 minutes, (2 wire)

20 gauge wire (min.) 100' length (max.)

WARRANTY

Units carry a lifetime warranty on the heat recovery core and a 5 year replacement parts warranty.

DIMENSIONS
RNC155

inches (mm)

*Sensible Efficiency – thermal **Latent Efficiency – moisture

Note: Effectiveness - based on temp. differential between the 2 airstreams
Efficiency – takes into account all power inputs

Performance (HVI certified)

Net supply air flow in cfm (L/s) against external static pressure

E.S.P

(external static pressure) [cfm (L/s)]

@ 0.1" (25 Pa) 150 (71)

@ 0.2" (50 Pa) 146 (69)

@ 0.3" (75 Pa) 134 (63)

@ 0.4" (100 Pa) 121 (57)

@ 0.5" (125 Pa) 106 (50)

@ 0.6" (150 Pa) 92 (43)

Max. Temperature Recovery 78%

Sensible Effectiveness
@ 65 cfm (31 L/s) 32°F (0°C) 76%

*Sensible Efficiency
@ 65 cfm (31 L/s) 32°F (0°C) 64%

*Sensible Efficiency
@ 68 cfm (32 L/s) -13°F (-25°C) 66%

VAC @ 60HZ 120

WATTS / Low speed. 49

WATTS / High speed 120

Amp rating 1.4

SP-RNC155

Date: _______________________________________________

Tag: __________________________Qty:__________________

Project: _____________________________________________

Engineer:____________________________________________

Contractor: __________________________________________

Supplier: ____________________________________________

Quote#: _____________________________________________

Submitted by: ________________________________________

All units conform to CSA and UL standards

FRESH AIR

FROM OUTSIDE

RECIRCULATING

DEFROST

DAMP ER

CORE

FILTERS

STALE AIR

FROM INSIDE

BLOWERS

MOTOR

19"

(483)

160

3

140

120

100

80

Air Flow (cfm)

2

60

1

40

20

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

Static Pres sur e (in w.g. )

*NOTE: Front clearance
of 25 inches (635 mm)
is recommended for
servicing unit.

3 - High Speed
*2 - Medium Low Speed
*1 - Low speed

* Manufacturers Dat a

STALE AIR

TO OUTSIDE

CONDENSATE DRAINS

33 5/8"

(850mm)

BALANCING DAMPER

FRESH AIR

TO INSIDE

14 3/4"

(375)

*All Duct Connections
6" (150mm)

6

THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE

The cross-flow heat recovery core transfers heat between the two air streams.
It is easily removed for cleaning or service.

MOTORS AND BLOWERS

Each air stream has one centrifugal blower driven by a common PSC motor. 2 speed fan operation.

FILTERS

Washable air filters in exhaust and supply air streams.

MOUNTING THE HRV

Four threaded inserts at corners of case designed to accept four reinforced
polyester straps that are supplied with the unit.

DEFROST

Recirculating damper defrost system.

CASE

Twenty gauge prepainted galvanized steel (G60) for superior corrosion resistance. Insulated to prevent
exterior condensation. Drain connections two - 1/2" (12mm) OD.

WEIGHT 71 lbs. (32.5 kg) SHIPPING WEIGHT 73 lbs. (33.5 kg)

CONTROLS - HRV System Control

HRV defaults to LOW SPEED when plugged in. HIGH SPEED option is accessible by connecting remote
controls to designated terminals inside electrical box of HRV.

Standard LOW SPEED SETTING can be increased to medium low.
Off (Standby)/Low or OFF/HIGH speed operation is also available.

OPTIONAL MAIN CONTROLS (only one main control can be installed on the system)
99-116 Dehumidistat Ventilation Control - Dehumidistat Dial, ON/OFF Switch and LOW/HIGH

Switch (3 wire) 20 gauge wire (min.) 100' length (max.)

99-2040 20/40 ON/OFF Dehumidistat - Dehumidistat Dial, ON/OFF Switch and 20/40 Switch.

The 20/40 Switch will toggle from continuous low speed ventilation to intermittent low
speed ventilation of 20 minutes fan ON and 40 minutes fan OFF. (4 wire) 20 gauge wire
(min.) 100' length (max.)

99-RECIRC Recirculation Control - Dehumidistat Dial, ON/OFF Switch and Recirculation Switch.

The Recirculation Switch will toggle from continuous low speed ventilation to continuous
low speed recirculation. (4 wire) 20 gauge wire (min.) 100' length (max.)

99-130 Remote Dehumidistat - Dehumidistat Dial only. (2 wire) 20 gauge wire (min.) 100' length

(max.)

OPTIONAL TIMERS

99-132 20 Minute Fan Timer - initiates high speed ventilation for 20 minutes. (3 wire) 20 gauge

wire (min.) 100’ length

99-104 Digital Electronic Timer- initiates high speed ventilation for 20, 40 or 60 minutes, (3

wire) 20 gauge wire (min.) 100' length

99-101 60 Minute Crank Timer - initiates high speed ventilation for up to 60 minutes, (2 wire)

20 gauge wire (min.) 100' length (max.)

WARRANTY

Units carry a lifetime warranty on the heat recovery core and a 5 year replacement parts warranty.

Dimensions
RNC200

inches (mm)

Performance (HVI certified)

Net supply air flow in cfm (L/s) against external static pressure

E.S.P

(external static pressure) [cfm (L/s)]

@ 0.1" (25 Pa) 207 (97)
@ 0.2" (50 Pa) 200 (94)
@ 0.3" (75 Pa) 184 (87)
@ 0.4" (100 Pa) 171 (80)
@ 0.5" (125 Pa) 152 (71)
@ 0.6" (150 Pa) 130 (61)
@ 0.7" (175 Pa) 116 (55)
@ 0.8" (200 Pa) 86 (40)

Max. Temperature Recovery 74%

Sensible Effectiveness
@ 66 cfm (31 L/s) 32°F (0°C) 74%

*Sensible Efficiency
@ 66 cfm (31 L/s) 32°F (0°C) 64%

*Sensible Efficiency
@ 109 cfm (51 L/s) -13°F (-25°C) 62%

VAC @ 60HZ 120

WATTS / Low speed. 87

WATTS / High speed 164

Amp rating 1.4

*Sensible Efficiency – thermal **Latent Efficiency – moisture

Note: Effectiveness - based on temp. differential between the 2 airstreams
Efficiency – takes into account all power inputs

Engineering Data - HRV Model RNC200

Date: _______________________________________________

Tag: __________________________Qty:__________________

Project: _____________________________________________

Engineer:____________________________________________

Contractor: __________________________________________

Supplier: ____________________________________________

Quote#: _____________________________________________

Submitted by: ________________________________________

All units conform to CSA and UL standards

SP-RNC200

FRESH AIR

FROM OUTSIDE

RECIRCULATING

DEFROST

DAMPER

CORE

STALE AIR

TO OUTSIDE

CONDENSATE DRAINS

FILTERS

33 5/8"

(850 mm)

STALE AIR

FROM INSIDE

BLOWERS

MOTOR

FRESH AIR

TO INSIDE

BALANCING DAMPER

19"

(483 mm)

220

3

200

180

160

140

120

2

Air Flow (cfm)

100

1

80

60

40

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

14 3/4"

(375 mm)

Static Pressure (in w.g.)

*NOTE: Front
clearance
of 25 inches
(635 mm)
is recommended
for servicing unit.

*All Duct
Connections
6" (150 mm)

3 - High Speed
*2 - Medium Low Speed
*1 - Low speed

* Manufacturers Dat a

7

All units conform to CSA and UL standards

Engineering Data - HRV Model RNC10

Date: _______________________________________________

Tag: __________________________Qty:__________________

Project: _____________________________________________

Engineer:____________________________________________

Contractor: __________________________________________

Supplier: ____________________________________________

Quote#: _____________________________________________

Submitted by: ________________________________________

SP-RNC10

THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE

The cross-flow heat recovery core transfers heat between the two air streams. It is easily removed for
cleaning or service.

MOTORS AND BLOWERS

Each air stream has one centrifugal blower driven by a common PSC motor. 2 speed fan operation.

FILTERS

Washable air filters in exhaust and supply air streams.

MOUNTING THE HRV

Four threaded inserts at corners of case designed to accept four PVC reinforced polyester straps that are
supplied with the unit.

DEFROST

Damper defrost system; defrosts automatically as the outdoor temperature falls.

CASE

Twenty gauge prepainted galvanized steel (G60) for superior corrosion resistance. Insulated to prevent
exterior condensation. Drain connections two - 1/2" (12mm) OD.

WEIGHT 63 lbs. (28.7 kg) SHIPPING WEIGHT 67 lbs. (30.4 kg)

CONTROLS - HRV System Control

HRV defaults to LOW SPEED when plugged in. HIGH SPEED option is accessible by connecting remote
controls to designated terminals inside electrical box of HRV.

Standard LOW SPEED SETTING can be increased to medium low.
Off (Standby)/Low or OFF/HIGH speed operation is also available.

OPTIONAL MAIN CONTROLS (only one main control can be installed on the system)
99-116 Dehumidistat Ventilation Control - Dehumidistat Dial, ON/OFF Switch and LOW/HIGH

Switch (3 wire) 20 gauge wire (min.) 100' length (max.)

99-2040 20/40 ON/OFF Dehumidistat - Dehumidistat Dial, ON/OFF Switch and 20/40 Switch.

The 20/40 Switch will toggle from continuous low speed ventilation to intermittent low
speed ventilation of 20 minutes fan ON and 40 minutes fan OFF. (4 wire) 20 gauge wire
(min.) 100' length (max.)

99-130 Remote Dehumidistat - Dehumidistat Dial only. (2 wire) 20 gauge wire (min.) 100' length

(max.)

OPTIONAL TIMERS

99-132 20 Minute Fan Timer - initiates high speed ventilation for 20 minutes. (3 wire) 20 gauge

wire (min.) 100’ length

99-104 Digital Electronic Timer- initiates high speed ventilation for 20, 40 or 60 minutes, (3

wire) 20 gauge wire (min.) 100' length

99-101 60 Minute Crank Timer - initiates high speed ventilation for up to 60 minutes, (2 wire)

20 gauge wire (min.) 100' length (max.)

WARRANTY

Units carry a lifetime warranty on the heat recovery core and a 5 year replacement parts warranty.

*Sensible Efficiency - thermal **Latent Efficiency - moisture

Note: Effectiveness - based on temp. differential between the 2 airstreams
Efficiency - takes into account all power inputs

Dimensions
RNC10

inches (mm)

Performance (HVI certified)

Net supply air flow in cfm (L/s) against external static pressure

E.S.P

(external static pressure) [cfm (L/s)]

@ 0.1" (25 Pa) 177 (83)

@ 0.2" (50 Pa) 164 (77)

@ 0.3" (75 Pa) 156 (73)

@ 0.4" (100 Pa) 143 (67)

@ 0.5" (125 Pa) 123 (58)

@ 0.6" (150 Pa) 100 (47)

@ 0.7" (175 Pa) 38 (18)

Max. Temperature Recovery 78%

Sensible Effectiveness
@ 67 cfm (32 L/s) 32°F (0°C) 76%

*Sensible Efficiency
@ 67 cfm (32 L/s) 32°F (0°C) 66%

*Sensible Efficiency
@ 68 cfm (32 L/s) -13°F (-25°C) 60%

VAC @ 60HZ 120

WATTS / Low speed. 63

WATTS / High speed 173

Amp rating 1.4

3 - High Speed
*2 - Medium Low Speed
*1 - Low speed

200

180

3

160

140

120

2

100

Air Flow (cfm)

1

80

60

40

20

0 0 .1 0.2 0.3 0 .4 0 .5 0.6 0.7 0 .8

Static Pressure (in w.g.)

*Manufacturer’s Data

FRESH AIR

FROM OUTSIDE

DEFROST

DAMPER

DEFROST

PORT

FILTERS

STALE AIR

FROM INSIDE

CONDENSATE DRAINS

33-5/8"

BALANCING DAMPER

STALE AIR

TO OUTSIDE

BLOWERS

FRESH AIR

TO INSIDE

*NOTE:

Front clearance of
25 inches (635 mm)
is recommended
for servicing unit.

14 3/4"

(375)

19"

(483)

*All Duct

Connections
6"(150mm)

8

All units conform to CSA and UL standards

Engineering Data - HRV Model RNC20

Date: _______________________________________________

Tag: __________________________Qty:__________________

Project: _____________________________________________

Engineer:____________________________________________

Contractor: __________________________________________

Supplier: ____________________________________________

Quote#: _____________________________________________

Submitted by: ________________________________________

SP-RNC20

THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE

The cross-flow heat recovery core transfers heat between the two air streams.
It is easily removed for cleaning or service.

MOTORS AND BLOWERS

Each air stream has one centrifugal blower driven by a common PSC motor. 2 speed fan operation.

FILTERS

Washable air filters in exhaust and supply air streams.

MOUNTING THE HRV

Four threaded inserts at corners of case designed to accept four PVC reinforced
polyester straps that are supplied with the unit.

DEFROST

Damper defrost system; defrosts automatically as the outdoor temperature falls.

CASE

Twenty gauge prepainted galvanized steel (G60) for superior corrosion resistance. Insulated to prevent
exterior condensation. Drain connections two - 1/2" (12mm) OD.

WEIGHT 63 lbs. (28.7 kg) SHIPPING WEIGHT 67 lbs. (30.4 kg)

CONTROLS - HRV System Control

HRV defaults to LOW SPEED when plugged in. HIGH SPEED option is accessible by connecting remote
controls to designated terminals inside electrical box of HRV.

Standard LOW SPEED SETTING can be increased to medium low.
Off (Standby)/Low or OFF/HIGH speed operation is also available.

OPTIONAL MAIN CONTROLS (only one main control can be installed on the system)
99-116 Dehumidistat Ventilation Control - Dehumidistat Dial, ON/OFF Switch and LOW/HIGH

Switch (3 wire) 20 gauge wire (min.) 100' length (max.)

99-RECIRC Recirculation Control - Dehumidistat Dial, ON/OFF Switch and Recirculation Switch.

The Recirculation Switch will toggle from continuous low speed ventilation to continuous
low speed recirculation. (4 wire) 20 gauge wire (min.) 100' length (max.)

99-130 Remote Dehumidistat - Dehumidistat Dial only. (2 wire) 20 gauge wire (min.) 100' length

(max.)

OPTIONAL TIMERS

99-132 20 Minute Fan Timer - initiates high speed ventilation for 20 minutes. (3 wire) 20 gauge

wire (min.) 100’ length

99-104 Digital Electronic Timer- initiates high speed ventilation for 20, 40 or 60 minutes, (3

wire) 20 gauge wire (min.) 100' length

99-101 60 Minute Crank Timer - initiates high speed ventilation for up to 60 minutes, (2 wire)

20 gauge wire (min.) 100' length (max.)

WARRANTY

Units carry a lifetime warranty on the heat recovery core and a 5 year replacement parts warranty.

Dimensions
RNC20

inches (mm)

*Sensible Efficiency - thermal **Latent Efficiency - moisture

Note: Effectiveness - based on temp. differential between the 2 airstreams
Efficiency - takes into account all power inputs

Performance (HVI certified)

Net supply air flow in cfm (L/s) against external static pressure

E.S.P

(external static pressure) [cfm (L/s)]

@ 0.1" (25 Pa) 214 (101)

@ 0.2" (50 Pa) 206 (97)

@ 0.3" (75 Pa) 193 (91)

@ 0.4" (100 Pa) 184 (87)

@ 0.5" (125 Pa) 170 (80)

@ 0.6" (150 Pa) 155 (73)

@ 0.7" (175 Pa) 137 (65)

Max. Temperature Recovery 69%

Sensible Effectiveness
@ 119 cfm (56 L/s) 32°F (0°C) 67%

*Sensible Efficiency
@ 119 cfm (56 L/s) 32°F (0°C) 60%

*Sensible Efficiency
@ 117 cfm (55 L/s) -13°F (-25°C) 60%

VAC @ 60HZ 120

WATTS / Low speed. 70

WATTS / High speed 182

Amp rating 1.4

1

2

3

3 - High Speed
*2 - Medium Low Speed
*1 - Low speed

240

220

200

180

160

140

120

Air Flow (c fm)

100

80

60

40

20

0 0 .1 0.2 0.3 0 .4 0 .5 0.6 0.7 0 .8

Static Pressure (in w.g.)

*Manufacturer’s data

FRESH AIR

FROM OUTSIDE

DEFROST

DAMPER

DEFROST

PORT

FILTERS

STALE AIR

FROM INSIDE

33-5/8"

CONDENSATE DRAINS

STALE AIR

TO OUTSIDE

BLOWERS

FRESH AIR

TO INSIDE

BALANCING DAMPER

*NOTE:

Front clearance of
25 inches (635 mm)
is recommended
for servicing unit.

14 3/4"

(375)

19"

(483)

*All Duct

Connections
6"(150mm)

9

All units conform to CSA and UL standards

Engineering Data - HRV Model RNC5-TPD

Date: _______________________________________________

Tag: __________________________Qty:__________________

Project: _____________________________________________

Engineer:____________________________________________

Contractor: __________________________________________

Supplier: ____________________________________________

Quote#: _____________________________________________

Submitted by: ________________________________________

SP-RNC5-TPD

THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE

The cross-flow heat recovery core transfers heat between the two airstreams. It is easily removed for
cleaning or service.

MOTORS AND BLOWERS

Each air stream has an independent motorized impeller. 2 speed fan operation.

FILTERS

Washable air filters in exhaust and supply air streams.

DEFROST

Recirculating damper defrost system.

CASE

Twenty gauge prepainted galvanized steel (G60) for superior corrosion resistance. Insulated to prevent
exterior condensation. Drain connections 1/2" (12 mm) OD.

MOUNTING THE HRV

Four threaded inserts at corners of case designed to accept four reinforced polyester straps that are
supplied with the unit.

DUCT CONNECTIONS

4 - 5” (127 mm) duct connections.

WEIGHT 61 lbs. (28 kg) SHIPPING WEIGHT 64 lbs. (29 kg)

CONTROLS- HRV System Control

HRV defaults to user selected speed from switch on top of cabinet when plugged in. HIGH SPEED
option is accessible by connecting remote controls to designated terminals inside electrical box of HRV.

OFF(Standby)/LOW or OFF/HIGH speed operation is also available.

OPTIONAL MAIN CONTROLS (only one main control can be installed on the system)
99-116 Dehumidistat Ventilation Control - Dehumidistat Dial, ON/OFF Switch and

LOW/HIGH Switch (3 wire) 20 gauge wire (min.) 100' length (max.)

99-2040 20/40 ON/OFF Dehumidistat - Dehumidistat Dial, ON/OFF Switch and 20/40 Switch.

The 20/40 Switch will toggle from continuous low speed ventilation to intermittent low
speed ventilation of 20 minutes fan ON and 40 minutes fan OFF. (4 wire) 20 gauge wire
(min.) 100' length (max.)

99-RECIRC Recirculation Control - Dehumidistat Dial, ON/OFF Switch and Recirculation Switch.

The Recirculation Switch will toggle from continuous low speed ventilation to
continuous low speed recirculation. (4 wire) 20 gauge wire (min.) 100' length (max.)

99-130 Remote Dehumidistat - Dehumidistat Dial only. (2 wire) 20 gauge wire (min.) 100'

length (max.)

OPTIONAL TIMERS

99-132 20 Minute Fan Timer - initiates high speed ventilation for 20 minutes. (3 wire) 20

gauge wire (min.) 100’ length

99-104 Digital Electronic Timer- initiates high speed ventilation for 20, 40 or 60 minutes, (3

wire) 20 gauge wire (min.) 100' length

99-101 60 Minute Crank Timer - initiates high speed ventilation for up to 60 minutes, (2 wire)

20 gauge wire (min.) 100' length (max.)

WARRANTY

Units carry a lifetime warranty on the heat recovery core and a 5 year replacement parts warranty.

1

2

3

0

20

40

60

80

100

120

140

160

180

0 0 .1 0.2 0.3 0.4 0.5 0.6 0.7 0 .8 0.9 1 1.1

Static Pressure (in w.g.)

Air Flow (cfm)

3 - High Speed
*2 - Medium Low Speed
*1 - Low speed

* Manufacturers Dat a

*Sensible Efficiency - thermal **Latent Efficiency - moisture

Note: Effectiveness - based on temp. differential between the 2 airstreams
Efficiency - takes into account all power inputs

Performance (H.V.I. certified)

Net supply air flow in cfm (L/s) against external static pressure

E.S.P

(external static pressure) [cfm (L/s)]

@ 0.1" (25 Pa) 169 (80)
@ 0.2" (50 Pa) 156 (73)
@ 0.3" (75 Pa) 149 (70)
@ 0.4" (100 Pa) 136 (64)
@ 0.5" (125 Pa) 126 (59)
@ 0.6" (150 Pa) 116 (54)
@ 0.7" (175 Pa) 103 (48)
@ 0.8" (200 Pa) 89 (42)
@ 0.9" (225 Pa) 77 (36)
@ 1.0" (250 Pa) 58 (27)

Max. Temperature Recovery 78%

Sensible Effectiveness
@ 66 cfm (31 L/s) 32°F (0°C) 74%

*Sensible Efficiency
@ 66 cfm (31 L/s) 32°F (0°C) 61%

*Sensible Efficiency
@ 76 cfm (36 L/s) -13°F (-25°C) 63%

VAC @ 60HZ 120

WATTS / Low speed. 69

WATTS / High speed 147

Amp rating 1.7

Dimensions
RNC5-TPD

inches (mm)

27”

(690 mm)

15”

(378 mm)

2-1/4”

(57 mm)

18-3/4”

(475 mm)

SPEED
SELECTION
SWITCH

10

All units conform to CSA and UL standards

Engineering Data - HRV Model RNC120D

Date: _______________________________________________

Tag: __________________________Qty:__________________

Project: _____________________________________________

Engineer:____________________________________________

Contractor: __________________________________________

Supplier: ____________________________________________

Quote#: _____________________________________________

Submitted by: ________________________________________

SP-RNC120D

THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE

The cross-flow heat recovery core transfers heat between the two airstreams.
It is easily removed for cleaning or service.

MOTORS AND BLOWERS

Each air stream has an independent motorized impeller. 2 speed fan operation.

FILTERS

Washable air filters in exhaust and supply air streams.

MOUNTING THE HRV

Four threaded inserts at corners of case designed to accept four reinforced polyester straps that are supplied
with the unit.

DEFROST

Recirculating damper defrost system.

CASE

Twenty gauge prepainted galvanized steel (G60) for superior corrosion resistance. Insulated to prevent
exterior condensation. Drain connections- 1/2" (12 mm) OD.

DUCT CONNECTIONS

5” duct connections.

WEIGHT 42 lbs. (19 kg.) SHIPPING WEIGHT 45 lbs. (20.5 kg.)
CONTROLS - HRV System Control

HRV defaults to LOW SPEED when plugged in. HIGH SPEED option is accessible by connecting remote
controls to designated terminals inside electrical box of HRV.

Standard LOW SPEED SETTING can be increased to medium low.
Off (Standby)/Low or OFF/HIGH speed operation is also available.
OPTIONAL MAIN CONTROLS (only one main control can be installed on the system)
99-116 Dehumidistat Ventilation Control - Dehumidistat Dial, ON/OFF Switch and

LOW/HIGH Switch (3 wire) 20 gauge wire (min.) 100' length (max.)

99-2040 20/40 ON/OFF Dehumidistat - Dehumidistat Dial, ON/OFF Switch and 20/40 Switch.

The 20/40 Switch will toggle from continuous low speed ventilation to intermittent low
speed ventilation of 20 minutes fan ON and 40 minutes fan OFF. (4 wire) 20 gauge wire
(min.) 100' length (max.)

99-RECIRC Recirculation Control - Dehumidistat Dial, ON/OFF Switch and Recirculation Switch.

The Recirculation Switch will toggle from continuous low speed ventilation to continuous
low speed recirculation. (4 wire) 20 gauge wire (min.) 100' length (max.)

99-130 Remote Dehumidistat - Dehumidistat Dial only. (2 wire) 20 gauge wire (min.) 100'

length (max.)

OPTIONAL TIMERS

99-132 20 Minute Fan Timer - initiates high speed ventilation for 20 minutes. (3 wire) 20 gauge

wire (min.) 100’ length

99-104 Digital Electronic Timer- initiates high speed ventilation for 20, 40 or 60 minutes, (3

wire) 20 gauge wire (min.) 100' length

99-101 60 Minute Crank Timer - initiates high speed ventilation for up to 60 minutes, (2 wire)

20 gauge wire (min.) 100' length (max.)

WARRANTY

Units carry a lifetime warranty on the heat recovery core and a 5 year replacement parts warranty.

*Sensible Efficiency - thermal **Latent Efficiency - moisture

Note: Effectiveness - based on temp. differential between the 2 airstreams
Efficiency - takes into account all power inputs

Performance (HVI certified)

Net supply air flow in cfm (L/s) against external static pressure

E.S.P

(external static pressure) [cfm (L/s)]

@ 0.1" (25 Pa) 142 (67)
@ 0.2" (50 Pa) 137 (64)
@ 0.3" (75 Pa) 131 (62)
@ 0.4" (100 Pa) 128 (60)
@ 0.5" (125 Pa) 123 (58)
@ 0.6" (150 Pa) 115 (54)
@ 0.7" (175 Pa) 113 (53)
@ 0.8" (200 Pa) 105 (49)
@ 0.9" (225 Pa) 102 (48)
@ 1.0" (250 Pa) 96 (45)

Max. Temperature Recovery 72%

Sensible Effectiveness
@ 70 cfm (33 L/s) 32°F (0°C) 68%

*Sensible Efficiency
@ 70 cfm (33 L/s) 32°F (0°C) 59%

*Sensible Efficiency
@ 67 cfm (32 L/s) -13°F (-25°C) 56%

VAC @ 60HZ 120

WATTS / Low speed. 70

WATTS / High speed 160

Amp rating 1.5

3

2

1

3 - High Speed
*2 - Medium Low Speed
*1 - Low speed

* Manufacturers Dat a

Dimensions
RNC120D

inches (mm)

All duct collars are
5” diameter (127 mm)

Front View (if mounting vertically)
Bottom View (if mounting horizontally)

STALE AIR
TO OUTSIDE

22”

(559 mm)

FRESH AIR
FROM OUTSIDE

25 1/8”

(637 mm)

STALE AIR
FROM
BUILDING

FRESH AIR
TO
BUILDING

9 1/8”

(232 mm)

160

140

120

100

80

Air Flow (c fm)

60

40

20

0 0 .1 0.2 0.3 0.4 0.5 0.6 0.7 0 .8 0.9 1 1 .1 1.2 1.3

Static Pressure (in w.g.)

11

Engineering Data - HRV Model RNC120D

Option 1 - Horizontal Duct Configuration Dimensions inches

Option2-Vertical Duct Configuration Dimensions inches

The HRV can be installed horizontally or vertically as illustrated
on the following pages. The unit should be suspended using the
provided hanging straps. The unit must be level for proper

condensate drainage.

Sufficient clearance below the access door is required for
servicing the air filters and core. A minimum of 25" (635mm)
clearance is recommended so the door can be removed. Four
PVC reinforced polyester hanging straps are provided for
hanging the HRV.

STALE
AIR TO
OUTSIDE

22”

(559 mm)

BOTTOM VIEW FOR HORIZONTAL MOUNT

SERVICE CLEARANCE FROM BOTTOM

9-1/8”

(232 mm)

SIDE VIEW FOR HORIZONTAL MOUNT

FRESH AIR
FROM
OUTSIDE

25 1/8”

(637 mm)

OF UNIT IS MINIMUM 3’0”

STALE AIR
FROM BUILDING

FRESH AIR
TO BUILDING

STALE AIR
TO OUTSIDE

ALL DUCT COLLARS
ARE 5” DIAMETER

HANGING STRAPS

FRESH AIR
FROM OUTSIDE

ACCESS DOOR

STALE AIR
FROM BUILDING

Connect drain hose to spout located in door.

FRESH AIR
TO BUILDING

STALE
AIR TO
OUTSIDE

22”

(559 mm)

SERVICE CLEARANCE FROM BOTTOM

9-1/8”

(232 mm)

FRESH AIR

FROM
OUTSIDE

25 1/8”

SIDE VIEW FOR VERTICAL MOUNT

TOP VIEW FOR VERTICAL MOUNT

(637 mm)

OF UNIT IS MINIMUM 3’0”

STALE AIR
TO OUTSIDE

STALE AIR
FROM BUILDING

FRESH AIR
TO BUILDING

ALL DUCT COLLARS ARE
5” (127 mm) DIAMETER

ACCESS DOOR

Connect drain hose to the two field installed

spouts located on the bottom of the unit.

HANGING STRAPS

FRESH AIR
FROM OUTSIDE

STALE AIR
FROM BUILDING

“L” BRACKETS

(not included)

May be installed if
wall mounting is
desired for the
vertical installation.

FRESH AIR
TO BUILDING

Ventilation Dehumidistat

PART NO. 99-116

The High/Low Speed
Switch initiates High or
Low speed ventilation.
This control also has an
ON/OFF Switch and a
Dehumidistat Dial.

20/40 ON/OFF
Dehumidistat

PART NO. 99-2040

The 20/40 Switch will toggle
from continuous low speed
ventilation to an intermittent
mode of 20 minutes fan ON (in
low speed) and 40 minutes fan
OFF. The Dehumidistat Dial will
initiate High Speed ventilation
when the indoor humidity level
exceeds the set point (regardless
position of the 20/40 Switch.).
This control also has an ON/OFF
Switch.

Recirculation Control

PART NO. 99-RECIRC

The Recirculation Switch will
toggle from continuous low
speed ventilation to
recirculation mode (closes the
fresh air damper and
circulates the building air).
The Dehumidistat Dial will
initiate High Speed
ventilation when the indoor
humidity level exceeds the set
point (regardless position of
the RECIRC Switch.). This
control also has an ON/OFF
Switch and a Dehumidistat
Dial.

Remote Dehumidistat

PART NO. 99-130 W

hite

The Remote Dehumidistat
activates high speed ventilation
when the indoor humidity level
exceeds the set point.

12

20 Minute Timer

PART NO. 99-132

Crank Timer

PART NO. 99-101

Remote Control Devices

Touch Pad

The Touch Pad initiates high
speed operation.

20 Minute Status Lights

The 20 Minute Status Light indicates
high speed operation is activated.

Crank Dial

Rotate the dial for up to 60
minutes high speed operation.



Optional Main Control Features

The amount of ventilation required in your home will fluctuate
according to the activity level in the house. Higher activity levels
require more ventilation.

Main controls can be mounted in a central location of the home (i.e.
beside the furnace thermostat) which will provide the user with
complete control over their ventilation system from a convenient
location.

The ON/OFF Switch

The ON/OFF Switch will turn the HRV ON or OFF. Controls with an
ON/OFF switch can be modified to ON/Standby by adjusting the circuit
board DIP Switches (Refer to "Mode DIP Switch Settings").

The Dehumidstat

Main controls feature a dehumidistat which is used to reduce high
indoor humidity levels during the heating season. The control has a
selector knob with setpoints ranging from 20% to 80% relative
humidity (RH). Most people are comfortable when indoor relative
humidity levels are in a range from 30% to 45%.

The dehumidistat switches the HRV to high speed ventilation when the
moisture level in the home exceeds the desired setpoint. The
dehumidistat should only be used during the heating season. It must be
set to the OFF position throughout the rest of the year.

Dehumidistat
Dial

High/Low
Speed Switch

ON/OFF
Switch

Dehumidistat
Dial

Recirculation
Switch

ON/OFF
Switch

Dehumidistat
Dial

Optional Timers

Install timers at each exhaust location of your system.



Dehumidistat
Dial

20/40 Switch

ON/OFF
Switch

• Connects to RED, BLACK and GREEN (LED drive) terminals.

• Use a minimum of three 20 gauge low voltage wires.

• Connect up to 4 on 100 ft (91 m) wire max.

• Mounts in a 2 x 4 box.

• Initiates high speed ventilation for up to 60 minutes.

• Requires 2 lead low voltage (20 gauge) wire.

• Mounts in a 2" x 4" box.

DEHUMIDISTAT

Off

10

20

30

60

40

50

13

Location Selection

The HRV must be located in a heated space where it will be
possible to conveniently service the unit. Typically the HRV
would be located in the mechanical room or an area close to the
outside wall where the weather hoods will be mounted. If a
basement area is not convenient or does not exist, a utility or
laundry room may be used.

Attic installations are not normally recommended due to:

A) the complexity of work to install

B) freezing conditions in the attic

C) difficulty of access for servicing

Suspending the HRV

The hanging straps should be attached to the unit at the top end
corners (mounting screws are already located on the HRV case).
Securely fasten the other end of the straps to the floor joists with
wide head nails (not supplied), making sure the UNIT IS
LEVEL. The straps are designed to reduce the possibility of
noise, resonance or harmonics; therefore using the full length of
the strap between the HRV and the floor joists is recommended.

Suspending the HRV using the
Provided Hanging Straps

Locating and Suspending the HRV

All models except the RNC120D are designed for horizontal
installation only as shown.

Using full length hanger straps is recommended for vibration
control, but can be shorter if required.

A minimum of 25" (635mm clearance is recommended so the
door can be opened.

CAUTION

Unit must be installed level to ensure proper
condensate drainage. Due to the broad range of
installation and operational conditions,
consideration must be given for the possibility
of condensation forming on the unit or
connecting ducting. Objects below the
installation may be exposed to condensate.

Wide Head Nails

WIDE HEAD

(not supplied)

NAILS

(not supplied)

STRAPS

31"

(787)

19"

(483)

*NOTE:

Front clearance of
25 inches (635 mm)
is recommended
for servicing unit.

14 3/4"

(375)

AND
SCREWS

(supplied)

DETAIL

WARNING

Electric shock hazard. Can cause
injury or death. Before attempting to
perform any service or maintenance,
turn the electrical power to unit OFF
at disconnect switch(es). Unit may
have multiple power supplies.

WARNING

Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or loss of life.
Installation and service must be performed by a
qualified installer or service agency.

14

Suspending the RNC120D

Suspending the RNC120D

The hanging straps should be attached to the unit at the top end
corners (mounting screws are already located on the HRV case).
Securely fasten the other end of the straps to the ceiling making
sure the UNIT IS LEVEL. The straps are designed to reduce the
possibility of noise, resonance or harmonics; therefore using the
full length of the strap between the HRV and the floor joists is
recommended.

"L" BRACKETS (not included) may be installed if wall
mounting is desired for the vertical installation.

It is important to isolate the "L" BRACKET from the attached
surface to minimize vibration.

Use the hanging strap hardware to attache the brackets. Do not
drill additional holes in the HRV.

Horizontal Installation

Using full length hanger
straps is recommended
for vibration control, but
can be shorter if required.

DETAIL

ATTENTION

The unit must be mounted level for proper
drainage of the condensate pans.

JOIST
FASTENERS
(not supplied)

STRAPS
AND
SCREWS
(supplied)

Vertical Installation

Wall Mounting the HRV

15

Drain Connection (HRV Only)

During a defrost cycle, the HRV may produce some
condensation. This water should flow into a nearby drain, or be
taken away by a condensate pump.

The HRV cabinet has prepunched holes for the drain (see
below). Insert the drain spout through the hole in the drain pan.
Do not forget the “O ring” which seals each spout to the pan
REMEMBER TO HAND TIGHTEN ONLY the washer and
lock nut which hold the drain spout in place.

Construct a P-Trap using the plastic tee connector. Cut two
lengths of hose and connect each piece to an end of the “T”
fitting, then connect the other ends to the two drain spouts.
Position the “T” fitting to point upward and connect the drain
line. Tape or fasten base to avoid any kinks. Pour a cup of water
into the drain pan of the HRV after the drain connection is
complete. This creates a water seal which will prevent odors
from being drawn up the hose and into the fresh air supply of
the HRV.

Drain Connections

Note: Secondary drain pan may be required to
protect from condensate leakage.

Drain Set-up for Vertical Installation

Drain Set-up for Horizontal Installation

"P" Trap (HRV only)

Model RNC120D

CAUTION

The HRV and all condensate lines must be
installed in a space where the temperature is
maintained above the freezing point or freeze
protection must be provided.

DRAIN HOSE PLUMBING

PRE-PUNCHED HOLES (2)

DRAIN PAN DRAIN PAN

DRAIN

SPOUT

ZIP TIE

TO DRAIN

HARD PIPE PLUMBING

PRE-PUNCHED HOLES (2)

DRAIN PAN DRAIN PAN

DRAIN

SPOUT

1/2" HARD PIPE

TEE

JOINT

TEE

CONNECTOR

DRAIN

SPOUT

1/2 " I.D.

DRAIN HOSE

DRAIN

SPOUT

TO DRAIN

CAUTION

Drain trap and tubing MUST be below bottom of
door with 1/4" per foot downwards slope away
from unit.

Do not remove
cap from drain spout

Use “T” between drain pans
to create a “P Trap”. “P” trap
must be at least 6” (152 mm)
below unit.

Use drain spout provided in
door. “P” trap must be at least
6” (152 mm) below unit.

1/2” I.D.
condensate line

Do not remove
these drain plugs

1/2” I.D.
condensate line

16

The Three Methods of Installation

The three methods of installation for the HRV system are the
Simplified, Partially Dedicated and Fully Dedicated
Installations. Refer to the installation illustrations in this manual.

Simplified Installations

The Simplified Installation draws stale air from the cold air
return duct of the air handler/furnace and introduces an equal
amount of fresh air farther downstream into the cold air return.
Refer to "The Simplified Installation" in this manual.

The air handler/furnace blower must be running when the unit is
operating for this system to be effective. Refer to "Interlocking
HRV Operation to an Airhandler/Furnace Blower".

Partially Dedicated Installations

The Partially Dedicated Installation draws stale air from specific
points in the house and introduces an equal amount of fresh air
into the cold air return. Refer to "The Partially Dedicated
Installation" in this manual.

Stale air ducts should be installed where the worst air quality
problems occur (bathroom, kitchen, and laundry room). Each
location with a stale air duct should have a timer which will
initiate high speed ventilation. Refer to "Optional Timers" in this
manual.

The air handler/furnace blower should be running when the
HRV is operating to evenly distribute the fresh air throughout
the house. Refer to "Interlocking HRV Operation to an
"Airhandler/Furnace Blower".

Fully Dedicated Installations

The Fully Dedicated Installation draws stale air from specific
points in the house and introduces an equal amount of fresh air
to specific locations of the house. This system is not connected
to an air handler/furnace. Refer to "The Fully Dedicated
Installation" in this manual.

Stale air ducts should be installed where the worst air quality
problems occur (bathroom, kitchen, and laundry room). Each
location with a stale air duct should have a timer which will
initiate high speed ventilation. Refer to "Optional Timers" in this
manual.

Fresh air ducts should be installed to all bedrooms and living
areas, excluding bathrooms, kitchen and utility areas. Grilles
should be located high on a wall or in ceiling locations. Grilles
that diffuse the air comfortably such as the Round Diffuser are
recommended. If the floor is the only option available, then
special care should be taken in locating grilles. Areas such as
under baseboard heaters will help to temper the air. Also,
optional inline duct heaters are available for mounting in the
supply duct work to add heat if required.

Air Duct Design and Installation

A well designed and installed ducting system will allow the
HRV to operate at its maximum efficiency.

Always try to keep duct runs as short and straight as possible.
See Installation Diagrams for various installation options.

The inner and outer liners of the flexible insulated duct must be
clamped to the sleeve of the weatherhoods (as close to the
outside as possible) and the appropriate port on the HRV. It is
very important that the fresh air intake line be given special
attention to make sure it is well sealed. A good bead of high
quality caulking (preferably silicone sealant) will seal the inner
flexible duct to both the HRV port and the weatherhood prior to
clamping with a large zip tie.

To minimize air flow restriction, the flexible insulated duct that
connects the two outside weatherhoods to the HRV should be
stretched tightly and be as short as possible.

Twisting or folding the duct will severely restrict air flow.

Installing the Ducting Between the HRV & Living Areas
in the House

To maximize airflow in the duct system, all ducts should be kept
short and have as few bends or elbows as possible. Forty-five
degree elbows are preferred to 90° elbows. Use “Y” tees instead
of 90° elbows whenever possible.

All duct joints must be fastened with screws, rivets or duct
sealant and wrapped with mastic or a quality duct tape to
prevent leakage. Mastic is preferred but if duct tape is used, we
recommend aluminum foil duct tape.

Galvanized ducting from the HRV to the living areas in the
house is recommended whenever possible, although flexible
duct can be used in moderation if necessary.

To avoid possible noise transfer through the duct system, a short
length (approximately 12 inches or 300mm) of non-metallic
flexible insulated duct should be connected between the HRV
and the supply/exhaust duct system.

The main supply and return lines to/from the HRV must be 6
inches (150mm) minimum. Branch lines to the individual rooms
may be as small as 4 inches (100mm), but 5 inch (125mm) lines
are preferred .

All ducts running through attics and unheated spaces must be
sealed and insulated to code.

Installation Methods

Applications such as greenhouses, atriums,
swimming pools, saunas, etc. have unique
ventilation requirements which should be
addressed with an isolated ventilation system.

WARNING

Include a short length of fabric, flex duct or
other non-metallic connector in the “Fresh Air to
Building” hard ducted line in order to keep the
HRV separately grounded (electrically) from the
air handler. This will avoid a possible shock
hazard to service people if a short to ground
develops in one of the devices.

17

The Simplified Installation (Return/Return Method)

It is mandatory that the furnace run continuously or HRV

•

operation be interlocked with the furnace.

Check local codes/authority having jurisdiction for

•

acceptance.

FOUR PORT MODELS

DIRECT CONNECTION of both the HRV SUPPLY AIR STREAM and

RETURN AIR

EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN

WARNING

HRV must be balanced.

Refer to “Airflow Balancing” in this manual.

40" (1m) MINIMUM

Outdoors

NOTES:

1. Furnace blower is required to operate when ventilation from HRV is required.
The furnace must be set to run continuously or interlocked with HRV.

2. A minimum separation of 40 inches (1 m) is required between the two direct connections.

3. The exhaust air connection should be upstream of the supply air connection to prevent
exhausting any fresh air.

4. Weatherhood arrangement is for drawing purposes only. Six feet (2 m) minimum separation
required. Eighteen inches (460 mm) above grade minimum.

5. Due to the differences in pressure between the HRV and the equipment it is being
connected to, the HRV's airflow must be confirmed on site, using the balancing
procedure found in the installation manual.

3' (1 m) min.

recommended

Cool Air

Return

*Unit is normally balanced on
HIGH speed with air handler
blower ON.

FIVE PORT MODELS - Simplified Installation for Models RNC10/RNC20

Outdoors

40" (1m) MINIMUM

Stale Air To Outside

Return Air

3'

(1 m)

recommended

Forced Air

Furnace

min.

Fresh Air From Outside

Stale Air From Building

Field-supplied
Balancing Damper
(optional)

WARNING

Defrost air port needs to be drawn from clean
area without combustion appliances. To avoid
backdrafting of combustion products, never
draw

defrost air from a room with a naturally
aspirated
heater, gas dryer, stove, fire place etc.

appliance, i.e. furnace, hot water

Cool Air

Return

Fresh Air To House

High efficiency filter
or electronic air cleaner

*Unit is normally balanced on
HIGH speed with air handler
blower ON.

Air

Handler

CAUTION

Weatherhood arrangement - requires a minimum
of 6' (2m) separation and a minimum of 18" (460mm)
clearance above grade or anticipated snow level.

18

The Partially Dedicated Installation

Stale air drawn from key areas of home

•

(bathroom, kitchen, laundry)

Fresh air supplied to return air duct of air handler

•

FOUR PORT MODELS

DIRECT CONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN

EXHAUST AIR from various parts of home.
i.e. bathrooms (if required), kitchens (if required).

WARNING

HRV must be balanced.

Refer to “Airflow Balancing” in this manual.

(Stale air drawn from key areas of home)

Return Air

Outdoors

* Unit is normally balanced
on HIGH speed
with furnace blower ON.

NOTES:

1. Furnace blower is recommended to operate when HRV is on to provide good air distribution.

2. Weatherhood arrangement is for drawing purposes only. 6' (2 m) minimum separation required.
18" (460 mm) above grade minimum.

3. Due to the differences in pressure between the HRV and the equipment it is being connected to,
the HRV's airflow must be confirmed on site, using the balancing procedure found in
the installation manual.

4. The duct port configuration (Fresh Air from Outside, Stale Air to Outside, etc.) varies from model

to model. Check specifications for the duct configuration on your model.

3' (1 m) min .
recommended

Cool Air

Return

FIVE PORT MODELS - Partially Dedicated Installation for Models RNC10/RNC20

Outdoors

Stale Air To Outside

Fresh Air From Outside

Return Air

recommended

3' (1 m) min .

Forced Air

Furnace

STALE AIR from various parts of home.
i.e. bathrooms (if required), kitchens (if required).

Field-supplied
Balancing Damper
(optional)

WARNING

Defrost air port needs to be drawn from clean
area without combustion appliances. To avoid
backdrafting of combustion products, never
draw

defrost air from a room with a naturally
aspirated
heater, gas dryer, stove, fire place etc.

appliance, i.e. furnace, hot water

Cool Air

Return

Air

High efficiency filter
or electronic air cleaner

* Unit is normally balanced
on HIGH speed
with furnace blower ON.

Handler

CAUTION

Weatherhood arrangement - requires a minimum
of 6' (2m) separation and a minimum of 18" (460mm)
clearance above grade or anticipated snow level.

19

The Fully Dedicated Installation

Stale air drawn from key areas of home

•

(bathroom, kitchen, laundry)

Fresh air supplied to main living areas of house

•

FOUR PORT MODELS - Models RNC155/RNC200

Outdoors

Refer to “Airflow Balancing” in this manual.

Stale Air from various
parts of home.
i.e. bathrooms (if required)
kitchens (if required)

WARNING

HRV must be balanced.

Fresh air to house ­main living areas...
bedrooms, living room,
rec. room etc.

*Unit is normally balanced on HIGH speed
with air handler blower ON.

NOTES:

1. Weatherhood arrangement is for drawing purposes only. 6' (2m) minimum separation required.
18" (460mm) above grade minimum or above anticipated snow level .

2. The HRV air flow must be confirmed on site, using the balancing procedure found in the installation manual.

FIVE PORT MODELS - Fully Dedicated Installation for Models RNC10/RNC20

Outdoors

Stale Air To Outside

* Unit is normally balanced
on HIGH speed
with furnace blower ON.

Fresh Air From Outside

Fresh air to house ­main living areas...
bedrooms, living room,
rec. room etc.

STALE AIR from various parts of home.
i.e. bathrooms (if required), kitchens (if required).

Field-supplied
Balancing Damper

WARNING

(optional)

Defrost air port needs to be drawn from clean
area without combustion appliances. To avoid
backdrafting of combustion products, never
draw

defrost air from a room with a naturally

aspirated

appliance, i.e. furnace, hot water

heater, gas dryer, stove, fire place etc.

CAUTION

Weatherhood arrangement - requires a minimum
of 6' (2m) separation and a minimum of 18" (460mm)
clearance above grade or anticipated snow level.

Intake Weatherhood Requirements

• Should be located upstream (if there are prevailing winds) from the
exhaust outlet.

• At least 6' (2m) from the exhaust weatherhood.

• At least 6' (2m) away from dryer vents and air handler exhaust.

• A minimum of 6' (2m) from driveways, oil fill pipes, gas meters,
swimming pools or garbage containers.

• At least 18" (460mm) above the ground, or above the depth of expected
snow accumulation.

• At least 3' (1m) from the inside/outside corner of the building.

• Do not locate in a garage, attic, or crawl space.

Exhaust Weatherhood Requirements

• At least 6' (2m) from the ventilation air intake.

• At least 18" (460mm) above ground or above the depth of snow
accumulation.

• At lease 3' (1m) away from the corner of the building.

• At least 3' away from gas meter, electric meter or a walkway where fog
or ice could create a hazard.

• not into a garage, workshop or other unheated space.

When installing the weatherhood, its outside perimeter must be sealed
with exterior caulking.

Grilles

Adjustable grilles should be used to balance the flow rates into and out of
various rooms.

Grilles or diffusers should be positioned high on the wall or in the ceiling.
Kitchen exhaust grilles must never be connected to a range hood. They
should be installed at least 4 feet (1.2m) horizontally away from the stove.
This grille includes a removable grease filter. Canadian building codes
require that kitchen grilles be equipped with washable filters.

Field-supplied balancing dampers should be installed external to the unit to
balance the amount of stale air being exhausted with the amount of fresh air
being brought into the house. Refer to Air flow Balancing section.

20

Grilles and Weatherhoods

R

Weatherhood Clearances

1. ThermalCollarslidesovergalvanized
sleeveofWeatherhood.

2. FastenThermalCollartoBelt.

3. SlidetheInsulatedFlexibleDuctingover
theWeatherhood'sgalvanizedsleeveand
fastenittotheThermalCollar.

4. Hoodishingedtoallowforeasyaccess

 forcleaningofbirdscreen.

1/4"(6mm)SCREEN

(frontview)

EXTERIOR

WALL

SCREEN

(sideview)

COLLARISSUPPLIEDTO

ENSUREVAPOURBARRIER

IS100%SEALEDTO

WALLPLATE

12"galvanized

pipesupplied

Lifebreath Techgrille

4" (100mm) Part No. 99-140
5" (125mm) Part No. 99-145
6" (150mm) Part No. 99-141
8" (200mm) Part No. 99-148

Lifebreath Weatherhoods

5" (125mm) Part No. 99-185
6" (150mm) Part No. 99-186
7" (200mm) Part No. 99-187

Lifebreath
Kitchen Grille

6” x 10” Kitchen Grille
Part No. 10-002

Replacement Grease Filter
Part No. 10-002-2

REMOVABLE

FILTER

Weatherhood Installation

Local codes may require greater distances.

CAUTION

OUTSIDE CORNER

36" (1m)

recommended min.

INTAKE

18" (460mm) min.

recommended min.

6' (2m)

36" (1m)

recommended min.

EXHAUST

18" (460mm) min.

INSIDE CORNE

Weatherhood arrangement - requires a minimum of 6'
(2m) separation and a minimum of 18" (460mm)
clearance above the higher of the grade or anticipated
snow level.

CAUTION

21

Electrical

The HRV unit should be plugged into a standard designated (120VAC)
electrical outlet with a ground. The outlet should be serviced by a separate
15 amp/120V circuit. An extension cord should not be used with this
appliance. A qualified service technician should make any required
electrical connections.

Remote Control Connections

Prior to connecting remote devices, it is advisable to run
self test on the HRV/ERV.

Low voltage connections between the remote controls, the dehumidistat, or
the fan timer should be made by a qualified service technician. Low voltage
wires from the remote controls are connected to the HRV micro-processor
board.

Figure 1 - Factory DIP Switch Settings

The factory setting of the DIP switches (located on the circuit board)
provides continuous low speed ventilation. Optional Remote Controls will
initiate high speed ventilation.

Remote controls with an ON/OFF switch (refer to "Remote Control
Devices" in this manual) will shut the entire system down when the remote
control is in the OFF position. Changing the remote control from OFF to
STANDBY can be achieved by Setting the DIP Switch as per Figure 2.

Figure 2-DIP Switch Settings for Standby (When using
a Remote Control Device that has an ON/OFF Switch)

This DIP Switch Setting can be adjusted when using a system control that
has an ON/OFF switch (refer to "Remote Control Devices" in this manual).
"STANDBY" is achieved when the Remote Control Switch is in the "OFF"
position. The Dehumidistat and Timers will initiate high speed ventilation
regardless of the "ON/OFF" switch position when this DIP switch
configuration is used.

Changing OFF to STANDBY

The ventilator automatically operates on its lowest speed when plugged in
or switched on. This setting is factory supplied from an autotransformer
with two selectable low speeds. To switch to a continuous medium low
speed, an installing contractor must interchange the red and blue wires from

the autotransformer inside the electrical box. Whether or not this change is
made, the HRV will only be able to access a single selected low speed.

High speed is available with the use of optional remote controls connected
to the appropriate terminals inside the electrical box.

Increasing Low Speed to Medium Low

Figure 1 - Factory setting for OFF

Figure 2 - Contractor adjusted

setting for STANDBY

WARNING

In order to prevent electric shock when cleaning
or servicing the HRV, it is extremely important to
confirm the polarity of the power line that is
switched by the safety (disconnect) switch. The
hot line (black) is the proper line to be switched.
To confirm the proper polarity, use a voltmeter
or test lamp to ensure there is no power after
the switch when the door is open. Check
between that point and ground (on the cabinet).
Always make sure that the HRV is properly
grounded.

ON

HS

REMOTE

DFR2

DFR3

Figure 2 may not meet building code conformance
in certain geographical areas. Check with your

ATTENTION

local building authority.

ON

HS

REMOTE

DFR2

DFR3

22

Controls will use 2, 3 or 4 lead 20 gauge wire. Note
the number of leads required for each control (refer
to the above illustrations).

Wiring the Controls

Remove
factory
installed
jumper when
installing this
control

Factory
installed
jumper

Dehumidistat Ventilation Control

Part No. 99-116

Red to Red
Orange to

Orange

Black to
Black

Circuit Board

Terminal Strip

Remote Dehumidistat

Part No. 99-130W

Red to Red

Black to Black

DEHUMIDISTAT

Remove
factory
installed
jumper when
installing this
control

Remove
factory
installed
jumper when
installing
this control

2040 ON/OFF Dehumidistat

Part No. 99-2040

Red to Red

Orange to
Orange

Black to Black

Low Fan
to Blue

Circuit Board
Terminal Strip

Recirculation Control

Part No. 99-RECIRC

Red to Red

Orange to
Orange

Black to Black

Recirculate
to Blue

Factory
installed
jumper

Circuit Board

Terminal Strip

20 Minute Timer

(shown in a Decora cover plate)*

Red to Red

Black to
Black

Green LED
Drive to Green

Circuit Board

Terminal Strip

* The Decora cover plate (Part No. 99-107W) is a standard switch plate.

ATTENTION

Factory
installed
jumper

Factory
installed
jumper

Circuit Board

Terminal Strip

Crank Timer

Part No. 99-101

Red to Red

Black to
Black

Circuit Board

Terminal Strip

Digital Electronic Timer (DET)

Part No. 99-104

Red to Red

60

Off

50

10

20

30

40

Circuit Board

Terminal Strip

Green
Ground
to Green

Comms to
Yellow

23

Recirculating Damper Defrost (4 port models)

The recirculating damper defrost HRV has an electronically
controlled damper defrost mechanism. The defrost timer is
activated when the outside temperature drops below 27°F (­3°C). A motor driven damper door mechanism closes off the
supply air from outside allowing the exhaust air to recirculate
through the unit. After the defrost period, the damper operates in
the opposite direction to reopen the fresh air port. Defrost cycle
repeats until the temperature again rises above 27°F (-3°C).

Damper Defrost (5 port models)

The damper defrost HRV has a fifth port for defrost. An
electronically controlled damper defrost mechanism activates
the defrost timer when the outside temperature drops below
27°F (-3°C). A motor driven damper door mechanism closes off
the supply air from outside allowing room air to enter through
the fifth port of the unit. After the defrost period, the damper
operates in the opposite direction to reopen the fresh air port.
Defrost cycle repeats until the temperature again rises above
27°F (-3°C).

Defrost Operation

Defrost Cycle DIP Switch Settings - Increasing the Run Time

Defrost DIP Switch Settings (located on the circuit board) can be
adjusted to increase the unit’s run (ventilation) time. The three
minute defrost time cannot change.

FRESH AIR

FROM OUTSIDE

RECIRCULATING

DEFROST

DAMP ER

CORE

STALE AIR

TO OUTSIDE

FRESH AIR

FROM OUTSIDE

DEFROST

DAMPER

DEFROST

PORT

FILTERS

STALE AIR

FROM INSIDE

FILTERS

STALE AIR

FROM INSIDE

BLOWERS

MOTOR

FRESH AIR

TO INSIDE

STALE AIR

TO OUTSIDE

BLOWERS

FRESH AIR

TO INSIDE

Factory Setting

3 minute defrost time

17 minute run time

Option 1*

3 minute defrost time

25 minute run time

ON

HS

REMOTE

DFR2

DFR3

OFF ON

HS

REMOTE

DFR2

DFR3

SW1

*Lengthening the run time may result in ice build-up on the core.

SW1

CAUTION

Lengthening the run time may result in ice
buildup on the core.

Option 2*

3 minute defrost time

30 minute run time

ON

HS

REMOTE

DFR2

DFR3

ON

OFF

ON

SW1

24

It is necessary to have balanced air flow in an HRV. The volume of air
brought in from the outside must equal the volume of air exhausted by
the unit. If the air flow is not properly balanced, then:

• The HRV may not operate at its maximum efficiency

• A negative or positive air pressure may occur in the house

• The unit may not defrost properly

• Failure to balance HRV properly may void warranty

Excessive negative pressure

may have several undesirable effects. In
some geographic locations, soil gases such as methane and radon gas
may be drawn into the home through basement/ground contact areas.

Read the Application Warning in Clearances & Requirements section
of this manual!

Prior to balancing, ensure that:

1. All sealing of the duct system has been completed.

2. All of the HRV’s components are in place and

functioning properly.

3. Balancing dampers are fully open.

4. Unit is on HIGH speed.

5. Air flow in branch lines to specific areas of the house should be

adjusted first prior to balancing the unit. A smoke pencil used at the

grilles is a good indicator of each branch line's relative air flow.

6. After taking readings of both the stale air to the HRV duct and fresh

air to the house duct, the duct with the lower CFM ([L/s] velocity)

reading should be left alone, while the duct with the higher reading

should be dampered back to match the lower reading.

7. Return unit to appropriate fan speed for normal operation

8. A field-supplied balancing damper for the stale air side is required

for system balancing.

Balancing Procedure

The following is a method of field balancing an HRV using a Pitot
tube, which is advantageous in situations when flow stations are not
installed in the duct system. Procedure should be performed with the
HRV on high speed.

The first step is to operate all mechanical systems on high speed, which
have an influence on the ventilation system, i.e. the HRV itself and the
air handler, if applicable. This will provide the maximum pressure that
the HRV will need to overcome, and allow for a more accurate balance
of the unit.

Drill a small hole in the duct (about 3/16"), three feet downstream of
any elbows or bends, and one foot upstream of any elbows or bends.
These are recommended distances but the actual installation may limit
the amount of straight duct.

The Pitot tube should be connected to a magnehelic gauge or digital
manometer capable of reading from 0 to 0.25 in. (0-62 Pa) of water,
preferably to 3 digits of resolution. The tube coming out of the end of
the Pitot is connected to the high pressure side of the gauge. The tube
coming out of the branch of the Pitot is connected to the low pressure
or reference side of the gauge.

Insert the Pitot tube into the duct; pointing the tip into the air flow.

For general balancing it is sufficient to move the Pitot tube around in
the duct and take an average or typical reading. Repeat this procedure
in the other (supply or return) duct. Determine which duct has the
highest air flow (highest reading on the gauge). Then damper that air
flow back to match the lower reading from the other duct. The flow
should now be balanced.

Actual air flow can be determined from the gauge reading. The value
read on the gauge is called the velocity pressure. The Pitot tube comes
with a chart that will give the air flow velocity based on the velocity
pressure indicated by the gauge. This velocity will be in either feet per
minute or meters per second. To determine the actual air flow, the
velocity is multiplied by the cross sectional area of the duct being
measured.

This is an example for determining the air flow in a 6" duct.

The Pitot tube reading was 0.025 inches of water.

From the chart, this is 640 feet per minute.

The 6" duct has a cross sectional area of

= [3.14 x (6"÷12)

2

]÷4

= 0.2 square feet

The air flow is then:

640 ft./min. x 0.2 square feet = 128 cfm

For your convenience, the cross sectional area of some common round
duct is listed below:

DUCT DIAM. (inches) CROSS SECTION AREA (sq. ft.)

5 0.14
6 0.20
7 0.27

The accuracy of the air flow reading will be affected by how close to
any elbows or bends the readings are taken. Accuracy can be increased
by taking an average of multiple readings as outlined in the literature
supplied with the Pitot tube.

Air Flow Balancing

CAUTION

Ensure balanced air flow in HRV. Excessive
positive pressure may drive moist indoor air into
the external walls of the building where it may
condense (in cold weather) and degrade
structural components. May also cause key
holes to freeze up.

WARNING

Ensure balanced air flow in HRV/ERV. Excessive
negative pressure may also cause the back­drafting of vented combustion equipment.

25

Air Flow Balancing

Placement of Pitot Tube HRV

Pitot Tube and Gauge

Pitot Tube Air Flow Balancing Kit

Part No. 99-167

1 - magnehelic gauge
1 - Pitot Tube and hose
1 - Carry Case

Push and turn with slotted
screwdriver. Damper

automatically locks when

pressure is released.

When connecting ductwork to the collar, take
note where screws are located. Screws should
be located no further

than 1/2” from outside edge of collar, so as not
to impede operation of the damper.

1/2”

Hard/Rigid

ducting

Insulated flexible

ducting

Installations where the HRV is ducted
directly to the return of a furnace may
require additional dampening on the fresh air
to building duct.

This is due to the high return static pressures
found in some furnace installations.

Balancing Collar Instructions

Often the “Fresh Air to House” ducting will have the heaviest air flow which must be dampered down. A Balancing Damper is
located in the “Fresh Air to House” collar. The Balancing Collar feature is not available on all models.

NOTE

Graphic is for illustrative purposes only. Duct
connection ports may vary.

AIR

FLOW

Pitot tube

High Pressure Side

DUCT

Magnehelic gauge

AGNEHELIC

M

ATTENTION

Apply use of balancing dampers as
required.

Low Pressure Side

Place pitot tube a minimum of 18" from blower or elbows

Outdoors

Pitot

Note: Duct connections may vary,
depending on model.

Additional dampers
may be required

tube

Magnehelic

gauge

MAGNEHELIC

HELIC

E

GN

A

M

Magnehelic

gauge

Pitot
tube

26

AccuFlow Gauge Kit

1 - Accu-Flow Balancing Gauge
2 - Connection Hoses
4 - Rubber Fittings
1 - Instruction Page

Lifebreath Accu-Flow is designed to quickly and accurately balance the
airflows on units equipped
with balancing ports. Normally the HRV/ERV would be balanced on
high speed. If the HRV/ERV is connected to a forced air system, both
systems should be set to run at the highest operational speed when
balancing is performed.

Procedure:

Step 1 Remove balancing port covers.

Step 2 Insert rubber fittings into balancing ports on door. (Use light pressure until fitting is snug).

Step 3 Attach tubes to balancing gauge.

Step 4 Place gauge on metal door (gauge is equipped with a magnetic strip). Ensure gauge is level/plumb.

Step 5 Connect tubes to door ports as illustrated in step 5 (record readings).

Step 6 Connect tubes to door ports as illustrated in Step 6. (record readings).

Note: It is normal practice to lightly tap gauge if reading is non-responsive.

Step 7

Damper airflows as required.

Step 8

Repeat Steps 5 and 6 as required to confirm airflows

Step 5

Measuring Fresh Air Side (Always connect left side port
first).

1

0

2

0

3

0

4

0

7

0

6

0

7

0

8

0

9

0

1

0

0

0

1

0

2

0

3

0

4

0

7

0

6

0

7

0

8

0

9

0

1

0

0

0

Fresh Air

Step 6

Measuring Stale Air Side (Always connect left side port
first).

Air Flow Balancing using AccuFlow Gauge Part No. 99-170 Models RNC155 and RNC200 Only

Stale Air

27

Air Flow Balancing using the Door Ports Models RNC155 and RNC200 Only

The door ports ( MODELS RNC155 & RNC 200) are designed
to quickly and measure the airflows for balancing.

Normally the HRV would be balanced on high speed. If the
HRV is connected to a forced air system, both systems should be
set to run at the highest operational speed when balancing is
performed.

Balancing Procedure

Step 1 Remove balancing port covers.

Step 2 Insert one end of each connection hose into a rubber

fitting. (Use light pressure until fitting is snug).

Step 3 Attach the connection hoses to pressure gauge

Step 4 Fresh Air - Connect hoses to door ports as illustrated

(record reading).

Step 5 Stale Air - Connect hoses to door ports as illustrated

(record reading).

Step 6 Refer to the Airflow Reference Chart for the conversion

of gauge reading to airflow reading.

Step 7 Damper the airflows as required to balance the system.

The fresh airflow must equal the stale airflow.

Step 8 Repeat steps 4 to 7 as required to confirm airflows.

Magnehelic Door Port Balancing Kit

Part No. 99-206

Use the Magnehelic Gauge Kit (Part No. 99-206) for door port
balancing.

1 - Pressure Gauge 4 - Rubber Fittings
2 - Connection Hoses 1 - Instruction Page

Fresh Air

Step 4

Measuring Fresh Air Side (Connect to both ports at the same time).

Stale Air

Step 5

Measuring Stale Air Side (Connect to both ports at the same time).

Pressure Gauge

Reading

Fresh Air

Stream Flow

Stale Air

Stream Flow

(in w.g.)

(cfm) (cfm)

0.070 75 54

0.080 80 59

0.090 84 65

0.100 89 70

0.110 93 75

0.120 98 81

0.130 102 86

0.140 106 91

0.150 111 97

0.160 115 102

0.170 120 114

0.180 124 118

0.190 128 123

0.200 133 128

0.210 137 133

0.220 142 138

0.230 146 143

0.240 151 148

0.250 155 153

0.260 159 158

0.270 164 163

0.280 168 167

0.290 173 172

0.300 177 177

0.310 181 182

0.320 186 187

0.330 190 192

0.340 195 197

Airflow Reference Chart

Door port balancing is only available for Models
RNC155 and RNC200.

MAGNEHELIC

MAGNEHELIC

Pressure
Gauge

Pressure
Gauge

28

When using the Interface relay contacts to initiate blower operation on a
furnace, certain thermostats will initiate the outdoor cooling condenser when
R and G are closed.

Use this wiring configuration to prevent the Interface relay contacts from initializing
the condenser unit. This problem can occur at the thermostat because the Y
terminal is connected to the G terminal internal to the stat. When R and G are
closed at the furnace (by dehumidistat or relay) 24 Volts is sent to G

at thermostat.

24 Volts is then sent through Y

which will initiate outdoor condenser.

Interlocking HRV Operation to an Airhandler/Furnace Blower

Wire
Connector

29

Wiring Diagrams Model RNC5-TPD

RED

TO

MOTORS

BLUE

INTERFACE

RELAY CONTACTS

DEFROST DETAILS

Model RNC5 (Only)

BLACK

ORANGE

RED

BI-DIRECTIONAL
DAMPER MOTOR

PLUG IN
CONNECTOR

BLACK

ORANGE

RED

PCB PLUG - IN

12

P1

4

3

PIN 1 - RED
PIN 2 - ORANGE
PIN 3 - BLACK
PIN 4 - SPARE

30

Wiring Diagrams RNC120D HRV Control Box

TO

MOTORS

BLUE

INTERFACE

RELAY CONTACTS

DEFROST DETAILS

BLACK

ORANGE

RED

BI-DIRECTIONAL
DAMPER MOTOR

PLUG IN
CONNECTOR

BLACK

ORANGE

RED

PCB PLUG - IN

12

P1

3

4

PIN 1 - RED
PIN 2 - ORANGE
PIN 3 - BLACK
PIN 4 - SPARE

60-120D-WIRING

31

Wiring Diagrams RNC95/RNC10/RNC20/RNC155/RNC200

98-RNC3-001 INSHRV

0104

RNC3WIRINGDIAGRAM

LEGEND

HIGHVOLTAGE

12VLOWVOLTAGE

FIELDINSTALLED

12VLOWVOLTAGE

AUTO

TRANSFORMER

INTERFACE

RELAYCONTACTS

FANMOTORDETAILS

T9

T6

GREEN

BLACK

CAPACITOR

WHITE

RED

ORANGE

YELLOW

DIRECTMOUNTEDCAPACITOR

DEFROSTDETAILS

ModelRNC5(Only)

PLUGIN
CONNECTOR

BLACK

ORANGE

BI-DIRECTIONAL
DAMPERMOTOR

BI-DIRECTIONAL
DAMPERMOTOR

RED

BLACK

ORANGE

RED

PLUGIN
CONNECTOR

BLACK

ORANGE

RED

BLACK

ORANGE

RED

120V

POWER

SUPPLY

PCBPLUG-IN

12

3

PIN1-RED
PIN2-ORANGE
PIN3-BLACK
PIN4-SPARE

PCBPLUG-IN

12

3

PIN1-BLACK
PIN2-ORANGE
PIN3-RED
PIN4-SPARE

GREEN

WHITE

BLACK

WHITE

BLACK

BLUE

TO

MOTOR

RED

AUTOTRANS

T9T8T6T5T4T3T2

SEE

DEFROST

DETAIL

NEUTRAL LINE

T1

GROUND

T7

SPARE FAN O/P

C4 C5

N/C COMMON N/O

T10 T11 T12

P1

VDR2

VDR3

3/4AMPFUSE

VDR1

P1

4

BLUE

P3

THERMISTOR

P1

4

K1 K2 K3 K4

+-

12VAC
P4

C1

CR1

RED

P2
DEHUMIDISTAT

INTERNAL

DEHUMIDISTAT

(IFAPPLICABLE)

FACTORY

INSTALLED

JUMPER

HS

REMOTE

DFR2
DFR3

SW1

8

RED
+12V

ORANGE

OBCS

BLACK

DEHUMIDISTAT

GREEN

LEDDRIVE

RECIRCULATE

NON-

LOWFAN

ON

1

P5

GREEN

GROUND

COMMS

FUNCTIONAL
FUTURE USE
TERMINALS

32

Troubleshooting

Poor Air Flow

Supply air feels cold

Dehumidistat is not Operating

Humidity Levels are too High in Winter
Condensation is appearing on the
windows

Humidity Levels are too Low

HRV and / or Ducts Frosting up

Condensation or Ice Build Up in
Insulated Duct to the Outside

Water in the bottom of the HRV

20 Minute Timer Not Working

• 1/4” (6mm) mesh on the outside hoods is plugged

• filters plugged

• core obstructed

• house grilles closed or blocked

• dampers are closed if installed

• poor power supply at site

• duct is restricting HRV

• improper speed control setting

• HRV air flow improperly balanced

• poor location of supply grilles, the air flow may irritate
the occupant

• outdoor temperature extremely cold

• improper connection to ventilator

• external low voltage is shortened out by a staple or nail

• check dehumidistat setting it may be on OFF

• dehumidistat is set too high

.• lifestyle of the occupants

• moisture coming into the home from an unvented or
unheated crawl space

• moisture is remaining in the washroom/bathroom and
kitchen areas

• condensation seems to form in the spring and fall

• HRV is set at too low a speed

• dehumidistat control set too low

• blower speed of HRV is too high

• lifestyle of occupants

• HRV air flow may be improperly balanced

• HRV

air flow is improperly balanced

• malfunction of the HRV defrost system

• incomplete vapor barrier around insulated duct

• a hole or tear in outer duct covering

• drain pans plugged

• improper connection of HRV drain lines

• HRV is not level

• drain lines are obstructed

• HRV heat exchange core is not properly installed

•

Wiring

• Faulty control

• Faulty circuit board

• clean exterior hoods or vents

• remove and clean filter

• remove and clean core

• check and open grilles

• open and adjust dampers

• have electrician check supply voltage at house

• check duct installation

• increase the speed of the HRV

• have contractor balance HRV

• locate the grilles high on the walls or under the baseboards,

install ceiling mounted diffuser or grilles so as not to directly
spill the supply air on the occupant (eg. over a sofa)

• turn down the HRV supply speed. A small duct heater (1kw)
could be used to temper the supply air

• placement of furniture or closed doors is restricting the
movement of air in the home

• if supply air is ducted into air handler return, the air handler fan
may need to run continuously to distribute ventilation air
comfortably

• check that the correct terminals have been used

• check external wiring for a short

• set the dehumidistat at the desired setting

• set dehumidistat lower

• avoid hanging clothes to dry, storing wood and venting clothes
dryer inside. Heating wood may have to be moved outside

• vent crawl space and place a vapor barrier on the floor of the
crawl space

• ducts from the washroom/bathroom should be sized to remove

moist air as effectively as possible, use of a
washroom/bathroom fan for short periods will remove
additional moisture

• timer or fan can be added to washroom/bathroom exhaust

• on humid days, as the seasons change, some condensation

may appear but the home’s air quality will remain high with
some HRV use

• increase speed of the

HRV

• set dehumidistat higher

• decrease HRV blower speed

• humidity may have to be added through the use of humidifiers

• have a contractor balance HRV air flow

• Note: minimal frost build-up is expected on cores before

unit initiates defrost cycle functions

• have HVAC contractor balance the HRV

• ensure working properly.

• tape and seal all joints

• tape any holes or tears made in the outer duct covering

• ensure that the vapor barrier is completely sealed

• ensure O-Ring on drain nozzle sits properly

• look for kinks in line

• check water drain connections

• make sure water drains properly from pan

• disconnect external controls and

run unit through self test. If

the unit runs through self test successfully, then the circuit
board is okay.

• check wiring connection.

• make sure wires are connected to proper terminals.

• test 20 Minute Timer, press and hold the button for 10 seconds

then release. The unit should run on high speed and then return
to normal operation when the button is released.

Symptom Cause Solution

33

1. Inspect Exterior Hoods at least once a month.

Make sure exhaust and fresh air supply hoods are not blocked or
restricted by leaves, grass, or snow. In winter, it is especially important
to make sure snow is not blocking the hoods or that frost has not built
up on the wire mesh (bird screen).

WARNING: Blockage of hoods may cause an imbalance.

2. Clean Air Filters - Twice a Year

The standard filters equipped with your HRV are removable and
washable.

a) simply open access door and slide core out

b) remove filter clips

c) once clips are removed filters can be taken off the core to be rinsed

with water or a combination of mild soap and water. Do not clean in

the dishwasher

d) to re-assemble, place clean filter(s) (wet or dry) back into their

positions against the core and return clips to their original position

e) slide core back into its original position

3. Clean Core - Twice a Year

a) open access door

b) carefully grip ends of core and pull evenly outward.

-core may be snug, but will slide out of the channel

c) once removed from the cabinet remove filters

d) wash core in warm soapy water

(do not use dishwasher)

e) install the clean filters

f) install clean core

Note: Core installation label on the outer end of the core.

To install the clean core:

a) first mount the bottom flange of the core guide into the bottom H

channel approximately 1/4” (6mm)

b) mount the left or right side flange of the core guide approximately

1/4” (6mm) followed by the other side

c) mount the top flange of the core guide into the top H channel

approximately 1/4” (6mm)

d) with all four corners in place and the core straight and even, push

hard in the center of the core until the core stops on the back of the

cabinet

NOTE: Core will appear to stick out from cabinet approximately 1/8”
(3mm). This is designed this way so that the access door will fit tight
against the core.

4. Motors - Maintenance Free

5. Drain (condensate) Line - Clean Once a Year

Inspect drain line, drain spout and “P” trap for blockage, mold or kinks.
Flush with warm soapy water and replace if worn, bent or unable to
clean.

6. Clean Duct System if Required

The duct system running to and from the HRV may accumulate dirt.
Wipe and vacuum the duct once every year. You may wish to contact a
Heating/Ventilation company to do this.

7. General Maintenance - Twice a Year

Wipe down the inside of the cabinet with a damp cloth to remove dirt,
bugs and debris that may be present.

8. Cleaning the Fans

Fans may accumulate dirt causing an imbalance and/or excessive
vibration of the HRV. A reduction in the air flow may also occur. In
new construction this may result within the first year due to heavy dust
and may occur periodically after that over time depending on the
outdoor conditions.

• unplug the HRV and open the service door

• remove the core

• remove ducting (metal and/or flexible insulated type) from the red

and/or blue ports which are connected immediately inline with the

fan assembly

• use a small brush, such as a toothbrush or pipe

cleaner, and insert first

(a) through the large opening of the fan assembly and then

(b) through the smaller opening in the end of the fan assembly

• scrub individual fan blades until clean. Avoid moving or damaging

balancing flat weight, clip is usually found on one or more of the fan

blades

• vacuum and wipe

• reassemble making sure ducting is reattached firmly and insulation

and moisture barrier are sealed and taped

Before attempting this task, thought should be given to having a
qualified service technician complete the service work.

Maintenance HRV

343536