Lifebreath Rnc10 Users Manual

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Installation Instructions for Heat Recovery Ventilators with 2 Speed RNC Electronics

RNC Series
Models
RNC95
RNC155
RNC200
RNC10
RNC20
RNC120D
RNC5-TPD

Residential Heat Recovery Ventilators (HRV)
Manufactured with

2 Speed RNC Electronics

TI-RNC
0108

Table of Contents

Introduction

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

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.

Engineering Data - RNC95 .............................................3-4
Engineering Data - RNC155...............................................5

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

Engineering Data - RNC200...............................................6
Engineering Data - RNC10.................................................7
Engineering Data - RNC20.................................................8

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

Engineering Data - RNC5-TPD..........................................9
Engineering Data - RNC120D ....................................10-11

RNC Electronics

Remote Control Devices...................................................12
Locating and Suspending the HRV ..................................13

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).

Locating and Suspending the RNC120D..........................14
Drain Connection..............................................................15
Installation Methods .........................................................16

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.

Simplified Installation ......................................................17
Partially Dedicated Installation.........................................18
Fully Dedicated Installation..............................................19

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

Grilles and Weatherhoods.................................................20
Electrical ...........................................................................21
Changing OFF to Standby/
Increasing Low Speed to Medium....................................21

CAUTION

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

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.

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

IMPORTANT

NOTE

Please read this manual before
installing the HRV
(Heat Recovery Ventilator).

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

Leave this Manual for the Homeowner
TO BE COMPLETED BY CONTRACTOR AFTER INSTALLATION
Installing Contractor _________________________________________Telephone / Contact _____________________
Serial Number______________________________________________Installation Date ________________________
Model _________________________________________________________________________________________
2

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)

Performance (HVI certified)

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

E.S.P
(external static pressure)
@ 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
Sensible Effectiveness
@ 60 cfm (28 L/s)
*Sensible Efficiency
@ 60 cfm (28 L/s)

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.

*Sensible Efficiency
@ 61 cfm (29 L/s)

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
RNC95

18.5"
(470 mm)

24.5"
(622 mm)

inches (mm)

knockout for
side mounting of
EXHAUST return port
6" round collar
converted to oval

Hanging
straps (4)

Drain Pan
Drain spout

FRONT

SIDE

16"
(406 mm)

32°F (0°C)

88%

32°F (0°C)

75%

-13°F (-25°C)

68%
120

WATTS / Low speed.

60

WATTS / High speed

150

Amp rating

0.9

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

80

5 - High Speed

5
75

Air Flow (cfm)

70

65

60

55

50
0

0.1

0.2

0.3

0.4

0.5

0.6

Static Pressure (in w.g.)

All units conform to CSA and UL standards

Threaded
inserts (4)
at corners
18.5"
(470 mm)

minimum
18 inches (459 mm)
required for
service access

88%

VAC @ 60HZ

SUPPLY
Fresh air
from outside
5" round collar

Removable
Heat Recovery
Core

[cfm (L/s)]

EXHAUST
Stale Air
to outside
5" round collar
EXHAUST
Return air
from building

SUPPLY
Fresh air
to building
6" round
(conv. to oval)
collar

TOP

Choice of port location
Knockouts on top and
side of unit (use 1 only)
6" round (conv. to oval)
collar supplied

Date: _______________________________________________

Contractor: __________________________________________

Tag: __________________________Qty:__________________

Supplier: ____________________________________________

Project: _____________________________________________

Quote#: _____________________________________________

Engineer:____________________________________________

Submitted by: ________________________________________
3

SP-RNC95

Port Configuration and Airflow

Model RNC95

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 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.

SIDE MOUNTED PORT
standard location

Round port bent to oval

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.

TOP MOUNTED PORT
alternate location

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.

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.

4

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.

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
Sensible Effectiveness
@ 65 cfm (31 L/s)
*Sensible Efficiency
@ 65 cfm (31 L/s)
*Sensible Efficiency
@ 68 cfm (32 L/s)

78%
32°F (0°C)

76%

32°F (0°C)

64%

-13°F (-25°C)

66%

VAC @ 60HZ

120

WATTS / Low speed.

49

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

WATTS / High speed

120

99-116

Amp rating

1.4

99-RECIRC

99-130

OPTIONAL TIMERS

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

160

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

3
140

* Manufacturers Data

120

Air Flow (cfm)

99-2040

Dehumidistat Ventilation Control - Dehumidistat Dial, ON/OFF Switch and
LOW/HIGH Switch (3 wire) 20 gauge wire (min.) 100' length (max.)
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.)
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.)
Remote Dehumidistat - Dehumidistat Dial only. (2 wire) 20 gauge wire (min.) 100'
length (max.)

100

80
2

99-132
99-104
99-101

20 Minute Fan Timer - initiates high speed ventilation for 20 minutes. (3 wire) 20 gauge
wire (min.) 100’ length
Digital Electronic Timer- initiates high speed ventilation for 20, 40 or 60 minutes, (3
wire) 20 gauge wire (min.) 100' length
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.

inches (mm)

0

0.1

0.2
0.3
0.4
0.5
Static Pressure (in w .g.)

0.6

0.7

All units conform to CSA and UL standards

FILTERS

BLOWERS

CORE

MOTOR

STALE AIR
TO OUTSIDE

CONDENSATE DRAINS

20

STALE AIR
FROM INSIDE

FRESH AIR
FROM OUTSIDE

RECIRCULATING
DEFROST
DAMPER

1
40

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

19"
(483)

DIMENSIONS
RNC155

60

*All Duct Connections
6" (150mm)

FRESH AIR
TO INSIDE

33 5/8"
(850mm)

BALANCING DAMPER

14 3/4"
(375)

Date: _______________________________________________

Contractor: __________________________________________

Tag: __________________________Qty:__________________

Supplier: ____________________________________________

Project: _____________________________________________

Quote#: _____________________________________________

Engineer:____________________________________________

Submitted by: ________________________________________
5

SP-RNC155

Engineering Data - HRV

Model RNC200

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.)

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)
@ 0.2" (50 Pa)
@ 0.3" (75 Pa)
@ 0.4" (100 Pa)
@ 0.5" (125 Pa)
@ 0.6" (150 Pa)
@ 0.7" (175 Pa)
@ 0.8" (200 Pa)

207 (97)
200 (94)
184 (87)
171 (80)
152 (71)
130 (61)
116 (55)
86 (40)

Max. Temperature Recovery
Sensible Effectiveness
@ 66 cfm (31 L/s)
*Sensible Efficiency
@ 66 cfm (31 L/s)
*Sensible Efficiency
@ 109 cfm (51 L/s)

74%
32°F (0°C)

74%

32°F (0°C)

64%

-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

220

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

3

200
180

Air Flow (cfm)

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)

* Manufacturers Data

160
140
120

2

100
1
80
60
40
0

0.1

0.2

0.3
0.4
0.5
0.6
Static Pressure (in w.g.)

0.7

0.8

0.9

WARRANTY
Units carry a lifetime warranty on the heat recovery core and a 5 year replacement parts warranty.
All units conform to CSA and UL standards

inches (mm)

FRESH AIR
FROM OUTSIDE

RECIRCULATING
DEFROST
DAMPER

STALE AIR
FROM INSIDE

FILTERS

BLOWERS

CORE

MOTOR

STALE AIR
TO OUTSIDE

CONDENSATE DRAINS

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

19"
(483 mm)

Dimensions
RNC200

*All Duct
Connections
6" (150 mm)

FRESH AIR
TO INSIDE

33 5/8"
(850 mm)

BALANCING DAMPER

14 3/4"
(375 mm)

Date: _______________________________________________

Contractor: __________________________________________

Tag: __________________________Qty:__________________

Supplier: ____________________________________________

Project: _____________________________________________

Quote#: _____________________________________________

Engineer:____________________________________________

Submitted by: ________________________________________
6

SP-RNC200

Engineering Data - HRV

Model 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)

Performance (HVI certified)

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

E.S.P
(external static pressure)

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)

Sensible Effectiveness
@ 67 cfm (32 L/s)
*Sensible Efficiency
@ 67 cfm (32 L/s)
*Sensible Efficiency
@ 68 cfm (32 L/s)

78%
32°F (0°C)

76%

32°F (0°C)

66%

-13°F (-25°C)

60%

VAC @ 60HZ

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.)

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

177 (83)

@ 0.2" (50 Pa)

Max. Temperature Recovery

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.

120

WATTS / Low speed.

63

WATTS / High speed

173

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
200
180

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

3

160

*Manufacturer’s Data

140

Air Flow (cfm)

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.)

[cfm (L/s)]

@ 0.1" (25 Pa)

120
2
100
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.)

All units conform to CSA and UL standards

Dimensions
RNC10
inches (mm)

FRESH AIR
FROM OUTSIDE

DEFROST
DAMPER

STALE AIR
TO OUTSIDE

BLOWERS

FILTERS

FRESH AIR
TO INSIDE

STALE AIR
FROM INSIDE

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

* All Duct
Connections
6"(150mm)

14 3/4"
(375)

33-5/8"
CONDENSATE DRAINS

19"
(483)

DEFROST
PORT

BALANCING DAMPER

Date: _______________________________________________

Contractor: __________________________________________

Tag: __________________________Qty:__________________

Supplier: ____________________________________________

Project: _____________________________________________

Quote#: _____________________________________________

Engineer:____________________________________________

Submitted by: ________________________________________
7

SP-RNC10

Engineering Data - HRV

Model RNC20

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.

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
Sensible Effectiveness
@ 119 cfm (56 L/s)
*Sensible Efficiency
@ 119 cfm (56 L/s)
*Sensible Efficiency
@ 117 cfm (55 L/s)

69%
32°F (0°C)

67%

32°F (0°C)

60%

-13°F (-25°C)

60%

VAC @ 60HZ

120

WATTS / Low speed.

70

WATTS / High speed

182

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
240
220

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

3

200

*Manufacturer’s data

180

Air Flow (cfm)

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)

160
140
120

2

100
1

80
60
40
20
0

0.1

0.2

0.3
0.4
0.5
Static Pressure (in w.g.)

0.6

0.7

0.8

All units conform to CSA and UL standards

Dimensions
RNC20
inches (mm)

FRESH AIR
FROM OUTSIDE

DEFROST
DAMPER

STALE AIR
TO OUTSIDE

BLOWERS

FILTERS

FRESH AIR
TO INSIDE

STALE AIR
FROM INSIDE

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

* All Duct
Connections
6"(150mm)

14 3/4"
(375)

33-5/8"
CONDENSATE DRAINS

19"
(483)

DEFROST
PORT

BALANCING DAMPER

Date: _______________________________________________

Contractor: __________________________________________

Tag: __________________________Qty:__________________

Supplier: ____________________________________________

Project: _____________________________________________

Quote#: _____________________________________________

Engineer:____________________________________________

Submitted by: ________________________________________
8

SP-RNC20

Engineering Data - HRV

Model RNC5-TPD

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.

Dimensions
RNC5-TPD

Performance (H.V.I. certified)
Net supply air flow in cfm (L/s) against external static pressure

E.S.P
(external static pressure)
@ 0.1" (25 Pa)
@ 0.2" (50 Pa)
@ 0.3" (75 Pa)
@ 0.4" (100 Pa)
@ 0.5" (125 Pa)
@ 0.6" (150 Pa)
@ 0.7" (175 Pa)
@ 0.8" (200 Pa)
@ 0.9" (225 Pa)
@ 1.0" (250 Pa)

[cfm (L/s)]
169 (80)
156 (73)
149 (70)
136 (64)
126 (59)
116 (54)
103 (48)
89 (42)
77 (36)
58 (27)

Max. Temperature Recovery
Sensible Effectiveness
@ 66 cfm (31 L/s)
32°F (0°C)
*Sensible Efficiency
@ 66 cfm (31 L/s)
32°F (0°C)
*Sensible Efficiency
@ 76 cfm (36 L/s)

78%
74%
61%

-13°F (-25°C)

63%

VAC @ 60HZ

120

WATTS / Low speed.

69

WATTS / High speed

147

Amp rating

1.7

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

180

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

3
160
140

* Manufacturers Data

120

Air Flow (cfm)

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)

100
80
2
1

60
40
20
0
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.)

All units conform to CSA and UL standards

15”
(378 mm)

inches (mm)
27”
(690 mm)

2-1/4”
(57 mm)

SPEED
SELECTION
SWITCH

18-3/4”
(475 mm)

Date: _______________________________________________

Contractor: __________________________________________

Tag: __________________________Qty:__________________

Supplier: ____________________________________________

Project: _____________________________________________

Quote#: _____________________________________________

Engineer:____________________________________________

Submitted by: ________________________________________
9

SP-RNC5-TPD

Engineering Data - HRV

Model RNC120D

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
RNC120D

STALE AIR
TO OUTSIDE

FRESH AIR
FROM OUTSIDE

Performance (HVI certified)

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

E.S.P
(external static pressure)
@ 0.1" (25 Pa)
@ 0.2" (50 Pa)
@ 0.3" (75 Pa)
@ 0.4" (100 Pa)
@ 0.5" (125 Pa)
@ 0.6" (150 Pa)
@ 0.7" (175 Pa)
@ 0.8" (200 Pa)
@ 0.9" (225 Pa)
@ 1.0" (250 Pa)

[cfm (L/s)]
142 (67)
137 (64)
131 (62)
128 (60)
123 (58)
115 (54)
113 (53)
105 (49)
102 (48)
96 (45)

Max. Temperature Recovery
Sensible Effectiveness
@ 70 cfm (33 L/s)
*Sensible Efficiency
@ 70 cfm (33 L/s)
*Sensible Efficiency
@ 67 cfm (32 L/s)

72%
32°F (0°C)

68%

32°F (0°C)

59%

-13°F (-25°C)

56%

VAC @ 60HZ

120

WATTS / Low speed.

70

WATTS / High speed

160

Amp rating

1.5

*Sensible Efficiency - thermal **Latent Efficiency - moisture
Note: Effectiveness - based on temp. differential between the 2 airstreams
Efficiency - takes into account all power inputs
160

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

3

140

* Manufacturers Data

120

Air Flow (cfm)

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.)

100

80

2
1

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.)

All units conform to CSA and UL standards

All duct collars are
5” diameter (127 mm)

inches (mm)
STALE AIR
FROM
BUILDING

9 1/8”
(232 mm)

22”
(559 mm)
FRESH AIR
TO
BUILDING

25 1/8”
(637 mm)

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

Date: _______________________________________________

Contractor: __________________________________________

Tag: __________________________Qty:__________________

Supplier: ____________________________________________

Project: _____________________________________________

Quote#: _____________________________________________

Engineer:____________________________________________

Submitted by: ________________________________________
10

SP-RNC120D

Engineering Data - HRV

Model RNC120D

Option 1 - Horizontal Duct Configuration Dimensions

inches

FRESH AIR
STALE
FROM
AIR TO
OUTSIDE OUTSIDE

HANGING STRAPS

22”
(559 mm)

STALE AIR
FROM BUILDING

FRESH AIR
TO BUILDING
25 1/8”
(637 mm)

BOTTOM VIEW FOR HORIZONTAL MOUNT
SERVICE CLEARANCE FROM BOTTOM
OF UNIT IS MINIMUM 3’0”

STALE AIR
TO OUTSIDE
FRESH AIR
TO BUILDING

9-1/8”
(232 mm)

FRESH AIR
FROM OUTSIDE

STALE AIR
FROM BUILDING

ALL DUCT COLLARS
ARE 5” DIAMETER

ACCESS DOOR

SIDE VIEW FOR HORIZONTAL MOUNT

Connect drain hose to spout located in door.

Option 2 - Vertical Duct Configuration Dimensions
STALE
AIR TO
OUTSIDE

FRESH AIR
FROM
OUTSIDE

STALE AIR
TO OUTSIDE

inches
HANGING STRAPS

STALE AIR
FROM BUILDING
22”
(559 mm)

“L” BRACKETS
(not included)

May be installed if
wall mounting is
desired for the
vertical installation.
FRESH AIR
TO BUILDING

FRESH AIR
FROM OUTSIDE

25 1/8”
(637 mm)

STALE AIR
FROM BUILDING

9-1/8”
(232 mm)

SIDE VIEW FOR VERTICAL MOUNT
SERVICE CLEARANCE FROM BOTTOM
OF UNIT IS MINIMUM 3’0”
ALL DUCT COLLARS ARE
5” (127 mm) DIAMETER

ACCESS DOOR

FRESH AIR
TO BUILDING

TOP VIEW FOR VERTICAL MOUNT

Connect drain hose to the two field installed
spouts located on the bottom of the unit.

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.

11

Remote Control Devices
Optional Main Control Features

The Dehumidstat

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.

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.

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").

Ventilation Dehumidistat

Recirculation Control
PART NO. 99-RECIRC

High/Low
Speed Switch

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.

The Recirculation Switch will
toggle from continuous low
speed ventilation to
recirculation mode (closes the
fresh air damper and
circulates the building air).
Dehumidistat The Dehumidistat Dial will
Dial
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.

T


DEHUMIDISTA

ON/OFF
Switch

20/40 ON/OFF
Dehumidistat
PART NO. 99-2040

20/40 Switch

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
Switch




ON/OFF
Switch

Dehumidistat
Dial

Remote Dehumidistat
Dehumidistat
Dial

PART NO. 99-130 White

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




ON/OFF
Switch

Dehumidistat
Dial

Optional Timers
Install timers at each exhaust location of your system.
20 Minute Timer

Crank Timer

PART NO. 99-132

PART NO. 99-101
20 Minute Status Lights
The 20 Minute Status Light indicates
high speed operation is activated.

Off

10
20

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

30

60
50

40

Touch Pad
The Touch Pad initiates high
speed operation.

• 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.

12

Locating and Suspending the HRV

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.

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.

Attic installations are not normally recommended due to:
A) the complexity of work to install

Suspending the HRV using the
Provided Hanging Straps

B) freezing conditions in the attic
C) difficulty of access for servicing

Wide Head Nails
WIDE
HEAD
(not
supplied)

CAUTION

NAILS
(not supplied)

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.

STRAPS
AND
SCREWS
(supplied)

19"
(483)

31"
(787)

DETAIL

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

4"
3/ )
14 375
(

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

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.

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.

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.

13

Suspending the RNC120D

Horizontal Installation

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

JOIST
FASTENERS
(not supplied)

STRAPS
AND
SCREWS
(supplied)
DETAIL

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

Vertical Installation

Wall Mounting the HRV

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

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.

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.

14

Drain Connections

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.

"P" Trap (HRV only)
DRAIN HOSE PLUMBING
PRE-PUNCHED HOLES (2)

DRAIN PAN

CAUTION

DRAIN PAN

DRAIN
SPOUT

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
SPOUT

ZIP TIE

TEE
CONNECTOR

1/2 " I.D.
DRAIN HOSE

TO DRAIN

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.

HARD PIPE PLUMBING
PRE-PUNCHED HOLES (2)

DRAIN PAN

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
SPOUT

DRAIN PAN

1/2" HARD PIPE

TEE
JOINT

DRAIN
SPOUT
TO DRAIN

Model RNC120D
Drain Set-up for Vertical Installation

CAUTION
Drain trap and tubing MUST be below bottom of
door with 1/4" per foot downwards slope away
from unit.
1/2” I.D.
condensate line

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

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.

Drain Set-up for Horizontal Installation
Do not remove
these drain plugs

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

15

1/2” I.D.
condensate line

Installation Methods
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.

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.

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".

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.

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.

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.

Applications such as greenhouses, atriums,
swimming pools, saunas, etc. have unique
ventilation requirements which should be
addressed with an isolated ventilation system.
16

The Simplified Installation (Return/Return Method)

• It is mandatory that the furnace run continuously or HRV

WARNING

operation be interlocked with the furnace.

• Check local codes/authority having jurisdiction for
acceptance.

HRV must be balanced.
Refer to “Airflow Balancing” in this manual.

FOUR PORT MODELS

RETURN AIR

DIRECT CONNECTION of both the HRV SUPPLY AIR STREAM and
EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN

40" (1m) MINIMUM
3' (1 m) min.
recommended

Outdoors

Cool Air
Return

Forced Air
Furnace

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.

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

FIVE PORT MODELS - Simplified Installation for Models RNC10/RNC20
Return Air

Outdoors

40" (1m) MINIMUM
3' (1 m) min.
recommended

Stale Air To Outside

Fresh Air From Outside

Cool Air
Return
Fresh Air To House

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 appliance, i.e. furnace, hot water
heater, gas dryer, stove, fire place etc.

High efficiency filter
or electronic air cleaner

Air
Handler

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

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

17

The Partially Dedicated Installation

• Stale air drawn from key areas of home

WARNING

(bathroom, kitchen, laundry)

• Fresh air supplied to return air duct of air handler

HRV must be balanced.
Refer to “Airflow Balancing” in this manual.

FOUR PORT MODELS
DIRECT CONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN
(Stale air drawn from key areas of home)
EXHAUST AIR from various parts of home.
i.e. bathrooms (if required), kitchens (if required).

Return Air
Outdoors

3' (1 m) min .
recommended

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

Cool Air
Return

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.

Forced Air
Furnace

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

Return Air

Stale Air To Outside

3' (1 m) min .
recommended

Fresh Air From Outside

Cool Air
Return
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 appliance, i.e. furnace, hot water
heater, gas dryer, stove, fire place etc.

High efficiency filter
or electronic air cleaner

Air
Handler

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

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 Fully Dedicated Installation

• Stale air drawn from key areas of home

WARNING

(bathroom, kitchen, laundry)

• Fresh air supplied to main living areas of house

HRV must be balanced.
Refer to “Airflow Balancing” in this manual.

FOUR PORT MODELS - Models RNC155/RNC200

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

Outdoors

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
(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 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.

19

Grilles and Weatherhoods
Lifebreath
Kitchen Grille

Grilles

REMOVABLE
FILTER
6” x 10” Kitchen Grille
Part No. 10-002
Replacement Grease Filter
Part No. 10-002-2

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.

Lifebreath Techgrille

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.

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

CAUTION

Weatherhood Clearances

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

OUTSIDE CORNER

36" (1m)
recommended min.

36" (1m)
recommended min.

INSIDE CORNER

• 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.

6' (2m)
recommended min.

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

EXHAUST

INTAKE

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

18" (460mm) min.

18" (460mm) min.

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

Exhaust Weatherhood Requirements

Lifebreath Weatherhoods

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

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

• At least 18" (460mm) above ground or above the depth of snow
accumulation.
• At lease 3' (1m) away from the corner of the building.

Weatherhood Installation

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

COLLAR
IS
SUPPLIED
TO

ENSURE
VAPOUR
BARRIER

IS
100%
SEALED
TO

WALL
PLATE

SCREEN
(side
view)

• not into a garage, workshop or other unheated space.
When installing the weatherhood, its outside perimeter must be sealed
with exterior caulking.

12"
galvanized
pipe
supplied

Local codes may require greater distances.

CAUTION

1/4"
(6
mm)
SCREEN
(front
view)

EXTERIOR

WALL

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.

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.

20

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.

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.

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.

Changing OFF to STANDBY
Figure 1 - Factory DIP Switch Settings

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

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.

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.

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 1 - Factory setting for OFF

Figure 2 - Contractor adjusted
setting for STANDBY
ON

ON

ATTENTION

HS
REMOTE
DFR2
DFR3

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

HS
REMOTE
DFR2
DFR3

Increasing Low Speed to Medium Low
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.

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

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

21

Wiring the Controls
Dehumidistat Ventilation Control

2040 ON/OFF Dehumidistat

Part No. 99-116

Part No. 99-2040
Red to Red
Orange to
Orange
Black to
Black

Remove
factory
installed
jumper when
installing this
control

DEHUMIDISTAT

Red to Red

Remove
factory
installed
jumper when
installing this
control

Orange to
Orange
Black to Black

Low Fan
to Blue

Circuit Board
Terminal Strip

Circuit Board
Terminal Strip

Remote Dehumidistat

Recirculation Control

Part No. 99-130W

Part No. 99-RECIRC
Red to Red

Factory
installed
jumper

Black to Black

Red to Red

Remove
factory
installed
jumper when
installing
this control

Orange to
Orange
Black to Black
Recirculate
to Blue

Circuit Board
Terminal Strip

Circuit Board
Terminal Strip

20 Minute Timer

Crank Timer

(shown in a Decora cover plate)*

Part No. 99-101

Red to Red

Factory
installed
jumper

Black to
Black

Red to Red

Factory
installed
jumper

Black to
Black

Off

10
20

Green LED
Drive to Green

30

60
50

Circuit Board
Terminal Strip

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

Digital Electronic Timer (DET)
Part No. 99-104

ATTENTION

Red to Red

Factory
installed
jumper

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).

Green
Ground
to Green
Comms to
Yellow
Circuit Board
Terminal Strip

22

40

Defrost Operation
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).

STALE AIR
FROM INSIDE

FRESH AIR
FROM OUTSIDE

FILTERS

RECIRCULATING
DEFROST
DAMPER

BLOWERS

CORE

MOTOR

STALE AIR
TO OUTSIDE

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).

FRESH AIR
TO INSIDE

FRESH AIR
FROM OUTSIDE

DEFROST
DAMPER

STALE AIR
TO OUTSIDE

DEFROST
PORT

BLOWERS

FILTERS

FRESH AIR
TO INSIDE

STALE AIR
FROM INSIDE

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.

Factory Setting
3 minute defrost time
17 minute run time

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

Option 1*
3 minute defrost time
25 minute run time

ON

Option 2*
3 minute defrost time
30 minute run time

ON

ON

HS

HS

HS

REMOTE

REMOTE

REMOTE

DFR2

DFR2

DFR2

DFR3

DFR3

OFF

SW1

ON

SW1

OFF

DFR3

ON

SW1

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

23

Air Flow Balancing

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.

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

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 unit may not defrost properly
• Failure to balance HRV properly may void warranty

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.

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.

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.

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!

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.

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

This is an example for determining the air flow in a 6" duct.
The Pitot tube reading was 0.025 inches of water.

Prior to balancing, ensure that:

From the chart, this is 640 feet per minute.

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

The 6" duct has a cross sectional area of

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

= [3.14 x (6"÷12)2]÷4
= 0.2 square feet

3. Balancing dampers are fully open.
The air flow is then:

4. Unit is on HIGH speed.

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

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.

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

DUCT DIAM. (inches)

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.

5
6
7

CROSS SECTION AREA (sq. ft.)
0.14
0.20
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.

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.
24

Air Flow Balancing

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

DUCT
AIR
FLOW

ATTENTION

Pitot tube

Apply use of balancing dampers as
required.

Magnehelic gauge
High Pressure Side
LIC
MAGNEHE

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

Low Pressure Side

Placement of Pitot Tube HRV
Place pitot tube a minimum of 18" from blower or elbows

Outdoors
Pitot
tube

Magnehelic
gauge
MAGNEHELIC

Note: Duct connections may vary,
depending on model.

Pitot
tube

Magnehelic
gauge

Additional dampers
may be required

MAGNEHELIC

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.
Hard/Rigid
ducting

Insulated flexible
ducting

Push and turn with slotted
screwdriver. Damper
automatically locks when
pressure is released.

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.

25

1/2”
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.

Air Flow Balancing using AccuFlow Gauge Part No. 99-170

Models RNC155 and RNC200 Only

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).

Fresh Air

Stale Air
Step 6

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

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

0

0

10

10

20

20

30

30

40

40

70

70

60

60

70

70

80

80

90

90

10
0

10
0

Step 5

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

26

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.

Magnehelic Door Port Balancing Kit

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.

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

Part No. 99-206

1 - Pressure Gauge
2 - Connection Hoses

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.

Airflow Reference Chart

Fresh Air
Step 4
Measuring Fresh Air Side (Connect to both ports at the same time).

Pressure
Gauge

ELIC
MAGNEH

Stale Air
Step 5
Measuring Stale Air Side (Connect to both ports at the same time).

ELIC
MAGNEH

4 - Rubber Fittings
1 - Instruction Page

Pressure
Gauge

Pressure Gauge
Reading

Fresh Air
Stream Flow

Stale Air
Stream Flow

(in w.g.)

(cfm)

(cfm)

0.070
0.080
0.090
0.100
0.110
0.120
0.130
0.140
0.150
0.160
0.170
0.180
0.190
0.200
0.210
0.220
0.230
0.240
0.250
0.260
0.270
0.280
0.290
0.300
0.310
0.320
0.330
0.340

75
80
84
89
93
98
102
106
111
115
120
124
128
133
137
142
146
151
155
159
164
168
173
177
181
186
190
195

54
59
65
70
75
81
86
91
97
102
114
118
123
128
133
138
143
148
153
158
163
167
172
177
182
187
192
197

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

27

Interlocking HRV Operation to an Airhandler/Furnace Blower

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.

Wire
Connector

28

Wiring Diagrams

Model RNC5-TPD

RED
BLUE

TO
MOTORS
INTERFACE
RELAY CONTACTS

DEFROST DETAILS
Model RNC5 (Only)

PCB PLUG - IN
1

2
P1

PLUG IN
CONNECTOR

BI-DIRECTIONAL
DAMPER MOTOR

BLACK

BLACK

ORANGE

ORANGE

RED

RED

3

4

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

29

RNC120D HRV Control Box

TO
MOTORS

BLUE

Wiring Diagrams

INTERFACE
RELAY CONTACTS

DEFROST DETAILS
PCB PLUG - IN
1

2
P1

PLUG IN
CONNECTOR

BI-DIRECTIONAL
DAMPER MOTOR

BLACK

BLACK

ORANGE

ORANGE

RED

RED

3

4

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

60-120D-WIRING

30

Wiring Diagrams

RNC95/RNC10/RNC20/RNC155/RNC200

RNC3
WIRING
DIAGRAM
LEGEND

HIGH
VOLTAGE
12V

LOW
VOLTAGE
AUTO
TRANSFORMER

120V
POWER


SUPPLY





RED

BLACK

BLUE

WHITE
WHITE

FAN
MOTOR
DETAILS

INTERFACE
RELAY
CONTACTS

BLACK

FIELD
INSTALLED
12V
LOW
VOLTAGE

TO
MOTOR

BLACK

T6

T9

GREEN

GREEN

AUTO
TRANS
ORANGE

YELLOW

CAPACITOR

T2

ITE
WH
D
RE

T3

T4

T5 T6
SPARE

NEUTRAL

T7
LINE

T8

T9

FAN O/P

N/C COMMON N/O

T10

T11

T12

8

K4

T1
C4
SEE
DEFROST
DETAIL

C5

GROUND

P1
VDR2
DIRECT
MOUNTED
CAPACITOR

VDR3
K1

Model
RNC5
(Only)

PCB
PLUG
-
IN
1

3/4
AMP
FUSE

DEFROST
DETAILS

BLACK

ORANGE

ORANGE
RED

BLACK
DEHUMIDISTAT

-

+
C1

2

BI-DIRECTIONAL
DAMPER
MOTOR

3

GREEN
LED
DRIVE

4

BLUE
P3
THERMISTOR

RECIRCULATE

CR1

LOW
FAN

ON

12VAC
P4

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

RED
+12V
ORANGE
OBCS

VDR1

P1

BLACK

K3
FACTORY
INSTALLED
JUMPER

PLUG
IN
CONNECTOR

RED

K2

RED

GREEN
GROUND

HS
REMOTE
DFR2
DFR3

P2
DEHUMIDISTAT

NONFUNCTIONAL
FUTURE USE
TERMINALS

COMMS

1 P5
SW1

PCB
PLUG
-
IN
1

2
P1

PLUG
IN
CONNECTOR

BI-DIRECTIONAL
DAMPER
MOTOR

BLACK

BLACK

ORANGE

ORANGE

RED

RED

3

4

INTERNAL
DEHUMIDISTAT
(IF
APPLICABLE)

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

98-RNC3-001 INSHRV
0104

31

Troubleshooting
Symptom

Cause

Solution

Poor Air Flow

•
•
•
•
•
•
•
•
•

• 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

Supply air feels cold

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

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

• outdoor temperature extremely cold

• 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

Dehumidistat is not Operating

• improper connection to ventilator
• external low voltage is shortened out by a staple or nail
• check dehumidistat setting it may be on OFF

• check that the correct terminals have been used
• check external wiring for a short
• set the dehumidistat at the desired setting

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

• dehumidistat is set too high
.• lifestyle of the occupants

• HRV is set at too low a speed

• 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

•
•
•
•

•
•
•
•

• 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

Humidity Levels are too Low

dehumidistat control set too low
blower speed of HRV is too high
lifestyle of occupants
HRV air flow may be improperly balanced

HRV and / or Ducts Frosting up
• HRV air flow is improperly balanced
• malfunction of the HRV defrost system

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.

Condensation or Ice Build Up in
Insulated Duct to the Outside

• incomplete vapor barrier around insulated duct
• a hole or tear in outer duct covering

• tape and seal all joints
• tape any holes or tears made in the outer duct covering
• ensure that the vapor barrier is completely sealed

Water in the bottom of the HRV

•
•
•
•
•

• ensure O-Ring on drain nozzle sits properly
• look for kinks in line
• check water drain connections
• make sure water drains properly from pan

20 Minute Timer Not Working

• Wiring
• Faulty control
• Faulty circuit board

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

• 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.
32

Maintenance

HRV

1. Inspect Exterior Hoods at least once a month.

4. Motors - Maintenance Free
5. Drain (condensate) Line - Clean Once a Year

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).

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.

WARNING: Blockage of hoods may cause an imbalance.

6. Clean Duct System if Required

2. Clean Air Filters - Twice a Year
The standard filters equipped with your HRV are removable and
washable.

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.

a) simply open access door and slide core out

7. General Maintenance - Twice a Year

b) remove filter clips

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

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

8. Cleaning the Fans

e) slide core back into its original position

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.

3. Clean Core - Twice a Year

• unplug the HRV and open the service door

a) open access door

• remove the core

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

• remove ducting (metal and/or flexible insulated type) from the red
and/or blue ports which are connected immediately inline with the
fan assembly

d) wash core in warm soapy water
(do not use dishwasher)

• use a small brush, such as a toothbrush or pipe
cleaner, and insert first

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) install the clean filters

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

f) install clean core

(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

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)

• vacuum and wipe

b) mount the left or right side flange of the core guide approximately
1/4” (6mm) followed by the other side

• reassemble making sure ducting is reattached firmly and insulation
and moisture barrier are sealed and taped

c) mount the top flange of the core guide into the top H channel
approximately 1/4” (6mm)

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

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.

33

34

35

36



---

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