HEAT RECOVERY

VENTILATORS

MODELS VA3B, VB5B

VC5B

VA3B

VB5B

The Heat Recovery Ventilation (HRV) system offered by Bryant is the finest unit on the market today. The VA3B, VB5B, and

VC5B provide efficient and cost-effective heat recovery during the heating season when needed most.

As temperatures drop below 23°F (–5°C), indoor air is recirculated periodically through the heat exchanger core to prevent frost from forming. Competitors’ methods of supplementary electric defrost waste energy. Unlike rotary wheel heat exchangers which mix air streams, these cross flow or counterflow heat exchangers ensure that there is no mixing of the stale air stream with the fresh outdoor air stream.

A filter installed on the incoming outdoor air stream removes large airborne particles from the intake air stream before they enter the heat exchanger and reduces the maintenance required.

The units’ acoustically engineered design makes them the quietest on the market and ensures that comfort is felt, not heard.

Unlatching 2 suitcase style latches allows easy removal of the filters and core for cleaning.

FEATURES

• Energy saving defrost cycle

• Cross flow, counterflow heat exchangers

• Two filters on incoming outdoor air stream to protect the HRV core

• Acoustical design

• No-tools maintenance

• Polypropylene heat exchanger core

VC5B

Form No. PDS VA3B.15.2

MODEL NUMBER NOMENCLATURE

V A 3 B A B

B—Defrost

A—115-1-60

B—Second Series

3—Horizontal

5—Upflow/Downflow

015

Maximum Capacity (CFM)

015—(150 CFM)

020—(200 CFM)

027—(270 CFM)

A—Conventional (RNC)

B—Compact (Standard)

C—High Efficiency (Deluxe)

V—Heat Recovery Ventilator

TESTED/CERTIFIED

HOME VENTILATING INSTITUTE



DIVISION OF AMCA

CLIMATE MAP FOR ENERGY AND HEAT RECOVERY VENTILATORS

EDMONTON

VANCOUVER

CALGARY

REGINA

WINNIPEG

TIMMINS

SALEM

SACRAMENTO

BOISE

HELENA

SALT LAKE

CITY

PHOENIX

DENVER

BISMARK

MONTREAL

MADISON

DES MOINES

OTTAWA

MINNEAPOLIS

GREEN BAY

MILWAUKEE

DETROIT

SPRINGFIELD

TOPEKA

SYRACUSE

BOSTON

HARTFORD

CHICAGO

INDIANAPOLIS

HARRISBURG

COLUMBUS

WASHINGTON D.C.

SANTA FE

OKLAHOMA CITY

RALEIGH

NASHVILLE

ATLANTA

COLUMBIA

HONOLULU AUSTIN

BATON ROUGE

ORLANDO

HRV RECOMMENDED

ERV RECOMMENDED

HRV / ERV CONTACT YOUR DEALER FOR RECOMMENDATIONS

INFORMATION BASED ON AIRPORT 10-YEAR TEMPERATURE DATA & ARI HEATING AND COOLING LOAD HOURS

—2—

A98389

CONTROLS AND ACCESSORIES PART NO. NOMENCLATURE

K V B CN 01 01

01—Single Pack

01—Part Number

AC—Accessory

CN—Control

FL—Filter Media

TM—Timer

A—Original Series

B—Second Series

V—Heat Recovery Ventilator (HRV)

K—Accessory Kit

BAU

CONTROL DESCRIPTION

BAU—Bryant Automatic Control (VB5B and VC5B only)

BBS—Bryant Basic Control

BST—Bryant Standard Control

ACCESSORY DESCRIPTION

6FM—6 in. Flowmeters (2)

7FM—7 in. Flowmeters (2)

8FM—8 in. Flowmeters (2)

EXH—Exhaust Hood

HOD—Intake Hood

KIT—Balancing Kit

FIR—Interlock Relay

TIMER DESCRIPTION

20B—20-Minute Timer Kit Bryant

60M—60-Minute Adjustable Timer Kit

FILTER DESCRIPTION

112—11-1/2 x 12-3/4

116—11-7/8 x 16-5/8

123—12-15/16 x 13-1/2

145—14-3/8 x 15-1/2

713—7-13/16 x 13-1/2

810—8-1/8 x 10-3/4

812—8-7/8 x 12-3/4

916—9 x 16-5/8

Kit Number

KVBCN0101BBS

KVBCN0101BST

KVBCN0101BAU

KVAAC0101FIR

KVATM010120B

KVATM010160M

KVAAC0101HOD

KVAAC0101EXH

KVAAC0101KIT

KVAAC01016FM

KVAAC01017FM

KVAAC01018FM

KVAFL0101112

KVAFL0101812

KVAFL0101116

KVAFL0101916

KVAFL0101123

KVAFL0101145

KVAFL0101713

KVAFL0101810

ACCESSORIES

Description

Basic HRV Control

Standard HRV Control

Automatic HRV Control

Interlock Relay

20 Minute Push Button Timer

Where Used

Used with all HRVs

Used with all HRVs

Used with all VB5B and VC5B

When combining an HRV with a Furnace or Fan Coil

Used with all HRVs when 20 minute manual operation is required

60 Minute Timer Used with all HRVs, time is adjustable between 10 and 60 minutes

Exterior Intake and Exhaust Hood 2 Required, 1 for intake and 1 for exhaust on all models except VA3B

Exterior Exhaust Hood

Start up Balancing Kit

1 Required on VA3B models to prevent backflow along with 1 KVAAC0101HOD for intake

Start up Balancing Kit, includes (2) 6 in. Flow Meter Collars & Magnehelic Gage

6 in. Flow Meter Collar

7 in. Flow Meter Collar

8 in. Flow Meter Collar

Internal Metal Filter

At start up, when 6 in. duct work is connected to HRV

At start up, when 7 in. duct work is connected to HRV

At start up, when 8 in. duct work is connected to HRV

Used on VA3B015 Size Unit, 11-1/2 in. x 12-3/4 in., 1 per unit

Internal Metal Filter

Internal Metal Filter

Internal Metal Filter

Internal Metal Filter

Internal Metal Filter

Internal Metal Filter

Internal Metal Filter

Used on VA3B015 Size Unit, 8-7/8 in. x 12-3/4 in., 1 per unit

Used on VA3B020 Size Unit, 11-7/8 in. x 16-5/8 in., 1 per unit.

Used on VA3B020 Size Unit, 9 in. x 16-5/8 in., 1 per unit

Used on VC5B015 Size Unit, 12-15/16 in. x 13-1/2 in., 1 per unit

Used on VC5B020 VC5B027 Size Units, 14-3/8 in. x 15-1/2 in., 1 per unit

Used on VB5B015 Size Unit, 7-13/16 in. x 13-1/2 in., 2 per unit

Used on VC5B020 VC5B027 Size Units, 8-1/8 in. x 10-3/4 in., 1 per unit

—3—

CONTROL FEATURES

Basic Control: Allows the user to manually set fan speed to low or high as required to maximize comfort.

Standard Control: Offers automatic dehumidistat control and the option to select continuous or intermittent fan operation.

Automatic Control: In addition to features found with the standard control, this package offers a recirculation mode. This control may be used with stand alone versions of the VB5B and VC5B only.

CONTROL

DESCRIPTION

Basic

Standard

Automatic‡

* Air exchange with outside.

† No air exchange with outside.

‡ Use only on units with defrost.

FAN

SPEED CONTROL

Yes

Yes

Yes

DEHUMIDISTAT

CONTROL

No

Yes

Yes

CONTINUOUS MODE* INTERMITTENT MODE* CIRCULATION MODE†

Yes No No

Yes

Yes

Yes

Yes

No

Yes

CONTROL DESCRIPTION AND USAGE

Fan Speed Control —Enables user to modulate fan speed from low to high air exchange with outside.

Dehumidistat Control —Allows the user to select the relative humidity level at which the unit would change fan speed for dehumidification in the winter months.

Continuous Mode —If the relative humidity inside the building is lower than selected, air exchange occurs with the outside air at low speed. If the relative humidity inside the house is higher than selected, air exchange occurs with the outside air at high speed. Ensures continuous air exchange for constant air quality.

Intermittent Mode —If the relative humidity inside the building is lower than selected, no air exchange occurs and the system turns off. If the relative humidity inside the house is higher than selected, air exchange occurs with the outside at high speed. Ensures minimum air exchange level when the building is unoccupied to minimize operating costs.

Circulation Mode —If the relative humidity inside the building is lower than selected, the ambient air is circulated and filtered at high speed. If the relative humidity inside the house is higher than selected, air exchange occurs with the outside air at high speed. Ensures continuous movement and filtration of air for maximum comfort. Available with automatic control only.

AUTOMATIC DEFROST CYCLE FEATURES

All models offer a non-electric defrost cycle feature which prevents frost and ice buildup within the heat recovery core. When the outside air temperature falls below 23°F (–5°C) it is electronically sensed and the dampers close the outside air ports. This allows warm indoor air to recirculate within the heat recovery core. The frequency of this cycle increases as the outside air temperature decreases.

MODEL

VA3BAB

VB5BAB

VC5BAB

23°F TO 5°F (–5°C TO –15°C)

DEFROST*

5 Minutes

5 Minutes

6 Minutes

EXCHANGE†

60 Minutes

60 Minutes

60 Minutes

* Length of defrost time

† Time between defrost when within specified temperature range

5°F TO –22°F (–15°C TO –30°C)

DEFROST*

5 Minutes

5 Minutes

6 Minutes

EXCHANGE†

35 Minutes

35 Minutes

35 Minutes

BELOW –22°F (–30°C)

DEFROST*

5 Minutes

5 Minutes

6 Minutes

EXCHANGE†

20 Minutes

20 Minutes

20 Minutes

—4—

—5—

—6—

—7—

MODEL

Capacity—CFM @ 0.5–0.3 ESP (in. wc)

Port Locations

Core

Type

Weight—lb (kg)

Shipping Wt—lb (kg)

Shipping Dimensions (in.)

Height

Width

Depth

AIRFLOW PERFORMANCE

Capacity—CFM @ 0.5–0.3 ESP (in. wc)

Efficiency (Sensible)—percent

95°F (35°C)

32°F (0°C)

–13°F (–25°C)

Efficiency (Latent)—percent

@ all temperatures

Heat Core Exchange Area—cu ft (cu m)

ELECTRICAL DATA

Voltage

Max Power—watts

Max Amps

SPECIFICATIONS

CONVENTIONAL COMPACT HIGH EFFICIENCY

VA3BAB015 VA3BAB020 VB5BAB015 VB5BAB020 VC5BAB015 VC5BAB020 VC5BAB027

130–168 191–210 106–150 177–217 123–141 189–209 300–334

Top and Sides Top and Sides

Polypropylene

Cross Flow

Polypropylene

Cross Flow

60 (27)

67 (30.4)

80 (36.6)

85 (38.5)

Top

Polypropylene

Cross Flow

60 (27)

75 (34)

Top

Polypropylene

Cross Flow

80 (36.3)

89 (40.4)

Top

Polypropylene

Cross Flow

80 (36.3)

89 (40.4)

Top

Polypropylene

Counterflow

120 (54.5)

143 (64.9)

Top

Polypropylene

Counterflow

120 (54.5)

143 (64.9)

21.00

35.5

19.75

21.00

35.5

19.75

31.5

23.25

26.00

31.5

23.25

26.00

31.5

23.25

26.00

47.5

26.0

26.0

47.5

26.0

26.0

130–168

27

76

56

0

120 (11.2)

120

105

1.2

191–210

22

68

61

0

160 (14.9)

120

218

2.0

106–150

19

69

60

0

90 (8.4)

120

115

1.2

177–211

23

77

67

0

144 (13.3)

120

195

1.8

123–141

27

81

69

0

144 (13.3)

120

115

1.2

189–209

23

84

72

0

210 (19.5)

120

250

2.2

300–334

22

80

74

0

210 (19.5)

120

500

5.4

—8—

METHODS TO SIZE HRV’S

METHOD 1

1. Calculate cu ft of occupied space.

2. Multiply by recommended air changes per hr (AC/h).

3. Divide by 60 minutes per hr to convert to CFM.

EXAMPLE: 2000 sq ft with 8 ft ceiling

0.35 air changes per hr (AC/h)

(2000 sq ft x 8 ft ceiling x 0.35 AC/h) / 60 min/h = 93.3 CFM

METHOD 2

1. Multiply number of people times 15 CFM/person.

2. Multiply number of bath rooms 20 CFM/each.

3. Add 25 CFM for kitchen.

EXAMPLE: 2 people

2 baths

1 kitchen

(2 x 15) + (2 x 20) + 25 = 95 CFM

ADDITIONAL HEATING AND COOLING LOAD CHARTS

Although the ventilators process the outside air before it enters the home, additional heating and cooling loads need to be considered.

HEATING LOAD BTU

Outside

Temp °F

–25

–20

–15

–13

–10

–5

0

5

10

15

20

25

30

32

35

40

Heat Load (Btuh) @ Inside Design Temp 72°F

VA3BAB015 VA3BAB020 VB5BAB015 VB5BAB020 VC5BAB015 VC5BAB020 VC5BAB027 VL3AAA015* VL3AAA020*

7,990 9,290 6,970 7,690 5,500 6,650 9,990 — —

7,260

6,570

6,300

5,910

8,630

7,990

7,730

7,360

6,470

5,990

5,800

5,520

7,090

6,520

6,300

5,970

5,030

4,590

4,410

4,160

6,070

5,510

5,290

4,970

9,310

8,650

8,390

8,000

—

—

—

—

—

—

—

—

5,280

4,600

4,050

3,540

3,010

2,570

2,170

1,800

1,640

1,440

1,140

6,760

6,060

5,510

4,980

4,380

3,900

3,440

2,990

2,780

2,530

2,130

5,070

4,550

4,130

3,730

3,290

2,930

2,580

2,240

2,090

1,900

1,600

5,440

4,840

4,360

3,900

3,400

3,000

2,610

2,250

2,080

1,880

1,560

3,750

3,300

2,940

2,600

2,240

1,940

1,670

1,410

1,300

1,160

1, 940

4,470

3,910

3,470

3,050

2,600

2,240

1,910

1,600

1,460

1,300

1,040

7,380

6,640

6,060

5,500

4,870

4,350

3,850

3,370

3,140

2,870

2,430

—

—

—

—

3,170

2,890

2,610

2,330

2,200

2,030

1,760

—

—

—

—

4,730

4,320

3,900

3,490

3,280

3,040

2,630

* See ERV Product Data for details.

The heating load chart shows the heating loads in Btuh for a range of winter design temperatures for each model of ventilator.

EXAMPLE: The heating design temperature for Milwaukee, WI is –4°F. At –5°F, the additional heating load of the VA3BAB020 is 6760

Btuh. This additional load should be taken into consideration when sizing the heating equipment.

—9—

COOLING LOADS BTU

Outside

Enthalpy

Btu/lb

30

31

32

33

34

35

36

37

38

39

40

41

42

Cooling Load (Btuh) @ Inside Design Temp 75°F and 50% Relative Humidity

VA3BAB015 VA3BAB020 VB5BAB015 VB5BAB020 VC5BAB015 VC5BAB020 VC5BAB027 VL3AAA015* VL3AAA020*

700

1,170

1,020

1,690

780

1,300

990

1,650

770

1,290

990

1,650

1,390

2,310

550

920

800

1,330

1,640

2,110

2,580

3,050

3,520

3,990

4,460

4,930

5,400

5,870

6,340

2,370

3,050

3,720

4,400

5,080

5,760

6,430

7,110

7,790

8,460

9,140

* See ERV Product Data for details.

1,820

2,340

2,860

3,380

3,910

4,430

4,950

5,470

5,990

6,510

7,030

2,310

2,970

3,630

4,290

4,950

5,610

6,270

6,930

7,590

8,250

8,910

1,800

2,310

2,830

3,340

3,860

4,370

4,890

5,400

5,910

6,430

6,940

2,310

2,970

3,630

4,290

4,950

5,610

6,270

6,930

7,590

8,250

8,910

3,240

4,170

5,090

6,020

6,940

7,870

8,790

9,720

10,650

11,570

12,500

1,280

1,650

2,020

2,380

2,750

3,110

3,480

3,850

4,210

4,580

4,950

1,860

2,390

2,920

3,450

3,990

4,520

5,050

5,580

6,110

6,640

7,170

The cooling load chart shows loads in Btuh as well. To use the cooling load chart, first find the design enthalpy from a psychrometric chart using the design dry bulb and wet bulb temperatures. (See psychrometric chart on p. 11.) The cooling load can then be found for a range of enthalpies for each ventilator.

EXAMPLE: The cooling design dry bulb temperature for Milwaukee, WI is 87°F and the average wet bulb at that temperature is 73°F.

On the psychrometric chart the enthalpy is about 37.7 Btu/lb of dry air which will round up to 38 Btu/lb of dry air. In the left column, at 38 Btu/lb the VA3BAB020 would have an additional cooling load of 6430 Btuh. This additional load should be taken into account when sizing the air cooling equipment.

—10—

y air y air -0.3 Btu viation

Btu per pound of dr

Enthalpy de

-.02 BTU

-.01 BTU

10%

20%

30%

80

49

48

47

46

45

44

43

42

41

40

39

38

37

75

90% Relative Humidity

70

36

35

34

33

32

80%

70%

65

60%

50%

31

30

29

28

27

60

-.02 Btu

-.04 Btu

40%

-.06 Btu

55

-.08 Btu

50

26

25

24

23

22

21

20

19

45

40

18

17

16

15

14

13

12

35

30

+0.1 Btu

25

12

11

10

9

8

7

+0.2 Btu

+0.3 Btu

+0.4 Btu

+0.5 Btu

13.5 cu ft

13.0 cu ft

12.5 cu ft

14.0 cu ft

14.5 cu ft per pound of dr

—11—

HRV INSTALLED WITH FORCED AIR SYSTEM

HRV INSTALLED WITH INDEPENDENT AIR DISTRIBUTION

A92361

© 1998 Bryant Heating & Cooling Systems, 7310 W. Morris St. Indpls, IN 46231

—12—

A92360

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

UNIT MUST BE INSTALLED IN ACCORDANCE

WITH INSTALLATION INSTRUCTIONS

Cancels: PDS VA3B.15.1B

PRINTED IN U.S.A. Catalog No. 12VA-3B0 7-98