BENSON VRC-3 100-3, Installation, Service And User Instructions Manual

1704VRC3-AMEN, p 3/35 

INTRODUCTION

1.1

Basic

Information

The

instructions

in

this

manual

apply

to

Model

VRC

‐

3

gas

‐

fired/fan

‐

assisted

warm

air

heaters.

These

models

have

an

axial

fan

for

air

delivery.

These

heaters

are

designed

for

overhead

suspension

and

are

suitable

for

indoor

installation

only

installed

at

an

operation

ambient

temperature

between

  ‐

15°C

and

45°C.

When

installed

as

a

type

C12/C32

and

where

the

height

above

floor

level

is

greater

than

1,8

metres

measured

to

the

underside

of

the

appliance

they

may

be

used

as

a

garage

air

heater.

This

appliance

must

be

installed

in

accordance

with

the

rules

in

force.

Before

installation,

check

that

the

local

distribution

conditions,

nature

of

gas

and

pressure

and

adjustment

of

the

appliance

are

compatible.

A

permanent

electricity

supply

of

230

volts,

50

Hz,

single

phase

is

required.

Heaters

are

approved

for:

Type

C

12

 ‐ 

horizontal

vent

for

balanced

‐

flue

heaters;

Type

C

32

 ‐ 

vertical

vent

for

balanced

‐

flue

heaters;

Type

B

22

 ‐ 

vertical

vent;

Category

II

2H3

+

for

GB

and

IE

When

the

external

control

calls

for

heat,

an

electronic

control

begins

the

ignition

sequence

to

provide

for

a

safe

start.

About

30

seconds

after

the

call

for

heat,

the

fan

will

begin

circulating

warm

air.

The

electronic

control

will

supervise

the

flame

during

the

entire

heating

cycle

to

ensure

safe

operation.

When

the

required

room

temperature

is

reached,

the

main

burner

will

shut

down

leaving

the

fan

running

to

cool

down

the

heat

exchanger.

After

approximately

45

seconds,

the

fan

delay

relay

will

turn

off

the

fan.

1.2

Warranty

Warranty

is

void

if:

TECHNICAL

DATA

2.1

Specifications

Table

1

20

30

45

60

75

100

Gas category
Comb. Air & Flue Type B (1)
Comb. Air & Flue Type C (1)
Connection colars

mm

100

100

130

130

130

130

Heat inputs Hs

kW

26,42

31,63

54,38

73,25

87,85

114,87

Heat inputs Hi

kW

23,80

28,50

49,00

66,00

79,15

103,50

Heat output

kW

21,82

25,99

44,64

60,92

73,13

94,50

Thermal efficiency

%

91,70

91,20

91,10

92,30

92,39

91,30

Gas consumption G20

m3/h

2,52

3,02

5,19

6,98

8,38

11,19

Gas consumption G31

kg/h

1,86

2,22

3,82

5,15

6,17

8,24

Gas pipe connection (2)

inch

ESP MIN Press

Pa

50

50

50

100

150

100

ESP MAX Press

Pa

200

300

200

200

350

300

Air flow measured

m3/h

2248

2741

4023

5573

7079

8068

Temperature rise (3)

K

28

28

32

32

30

34

Electrical service (protection IP20)

400V 3P 

50Hz

Blower electrical rating

W

660

1250

1410

1700

3070

3200

Total electrical rating

W

770

1370

1530

1810

3180

3320

Blower Weight

kg 

14,5

20,5

27

26

41

45

Unit Weight

kg 

54

55,8

87

99

109

155

Total Weight

kg 

68,5

76,3

114

125

150

200

230/240V 1N 50Hz

230/240V 1N 50Hz

VRC-3

II2H3+

B22P

C12, C32, C42, C82

½"

¾"

a) VRC-3 heaters are installed in atmospheres containing flammable vapors or 

atmospheres containing chlorinated or halogenated hydrocarbons or atmospheres 
containing any silicone, aluminum oxide, etc., that adheres to spark ignition flame 
sensing probes. 

b)  The installation is not in accordance with these instructions. 

1 

2 

(1)  Gas appliance Classifications for approved venting methods based on CEN report CR 1749:2001. 
(2)  There is a difference between the gas connection diameter and the diameter of the supply line. Always use the most adequate diameter of the supply line 

to minimize the pressure drop through the gas pipes – if necessary, reduce the diameter of the supply line at the inlet of the unit. 

(3) Figure for isothermal conditions.