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

1704VRC3-AMEN, p 19/35 

When

 

a

 

number

 

of

 

heaters

 

are

 

to

 

be

 

connected

 

as

 

part

 

of

 

a

 

single

 

installation

 

each

 

heater

 

must

 

be

 

provided

 

with

 

a

 

separate

 

isolator.

 

The

 

electrical

 

connection

 

to

 

the

 

air

 

heater

 

is

 

at

 

the

 

back

 

of

 

the

 

appliance.

 

The

 

final

 

connection

 

must

 

be

 

made

 

in

 

the

 

terminals

 

provided

 

in

 

the

 

control

 

compartment.

 

Follow

 

the

 

wiring

 

diagram

 

provided

 

with

 

the

 

air

 

heater.

 

Electrical

 

supply

 

cable

 

conductor

 

size

 

should

 

be

 

1.5

 

mm.

 

Fit

 

the

 

cord

 

grip

 

supplied

 

with

 

the

 

heater.

 

The

 

length

 

of

 

conductors

 

between

 

the

 

cord

 

grip

 

and

 

the

 

terminals

 

must

 

be

 

such

 

that

 

in

 

the

 

event

 

that

 

the

 

cable

 

becomes

 

taut

 

the

 

line

 

conductors

 

do

 

so

 

before

 

the

 

earth

 

conductor.

 

 

3.7

 

Gas

 

supply

 

 

VRC

‐

3

 

air

 

heaters

 

are

 

designed

 

to

 

operate

 

on

 

either

 

natural

 

gas

 

(G20)

 

or

 

propane

 

gas

 

(G31).

 

Refer

 

to

 

the

 

specifications

 

in

 

section

 

2

 

of

 

this

 

document

 

and

 

to

 

the

 

data

 

plate

 

for

 

details

 

of

 

supply

 

pressures.

 

The

 

gas

 

meter

 

and

 

gas

 

service

 

must

 

be

 

checked

 

by

 

the

 

supply

 

undertaking

 

to

 

ensure

 

that

 

they

 

are

 

adequate

 

to

 

deal

 

with

 

the

 

total

 

load

 

of

 

all

 

gas

 

fired

 

apparatus

 

installed.

 

 
 
 

                   

INSTALLATION

 

 

 

4.1

 

Unpacking

 

and

 

preparation

 

 

Prior

 

to

 

dispatch,

 

the

 

air

 

heater

 

was

 

operated

 

and

 

tested

 

at

 

the

 

factory.

 

If

 

the

 

heater

 

has

 

incurred

 

any

 

damage

 

in

 

shipment,

 

file

 

a

 

report

 

claim

 

within

 

2

 

working

 

days

 

from

 

receipt.

 

Check

 

the

 

shipping

 

label

 

and

 

data

 

plate

 

to

 

ensure

 

the

 

specification

 

of

 

gas

 

and

 

electrical

 

supplies

 

are

 

compatible.

 

Read

 

this

 

document

 

and

 

become

 

familiar

 

with

 

the

 

installation

 

requirements

 

and

 

the

 

appliance

 

before

 

commencing

 

installation.

 

 

4.2

 

Suspending

 

the

 

air

 

heater

 

 

Before

 

installing

 

the

 

appliance,

 

check

 

to

 

ensure

 

that

 

the

 

supporting

 

structure

 

is

 

adequate

 

to

 

carry

 

the

 

weight

 

of

 

the

 

appliance

 

and

 

its

 

ancillaries

 

i.e.

 

flue

 

system.

 

Please

 

check

 

weights

 

specified

 

in

 

table

 

1.

 

 

When

 

the

 

heater

 

is

 

lifted

 

for

 

suspension,

 

support

 

the

 

bottom

 

of

 

the

 

heater

 

with

 

plywood

 

or

 

other

 

appropriately

 

placed

 

material.

  

If

 

the

 

bottom

 

is

 

not

 

supported,

 

damage

 

could

 

occur.

 

The

 

heater

 

is

 

supplied

 

with

 

four

 

point

 

suspension.

 

All

 

points

 

must

 

be

 

used.

 

Two

 

threaded

 

nut

 

retainers

 

are

 

provided

 

on

 

each

 

side

 

of

 

the

 

top

 

of

 

the

 

heater.

 

See

 

dimensions

 

in

 

section

 

2.2

 

and

 

figure

 

3.

 

Be

 

sure

 

that

 

the

 

threaded

 

hanger

 

rods

 

are

 

locked

 

to

 

the

 

heater

 

as

 

illustrated.

  

Recommended

 

maximum

 

hanger

 

rod

 

length

 

is

 

1.8m.

 

 



IMPORTANT

 

:

  

Suspend

 

the

 

heater

 

from

 

the

 

threaded

 

nut

 

retainers.

 

Do

 

not

 

suspend

 

from

 

the

 

heater

 

cabinet

 

panels.

 

Do

 

not

 

place

 

or

 

add

 

additional

 

weight

 

to

 

the

 

suspended

 

air

 

heater.

 

See

 

hazard

 

levels,

 

page

 

2.

 

The

 

heater

 

must

 

be

 

installed

 

in

 

a

 

level

 

plane

 

to

 

ensure

 

proper

 

operation.

 

Figure

 

3

 

Suspension

 

detail

Add

 

a

 

nut

 

to

 

lock

 

the

 

M10x1.5

 

hanger

 

rod

 

to

 

the

 

heater

 

 

 

 
 

4.3

 

Fitting

 

the

 

Combustion

 

air

 

inlet/Flue

 

system

 

 

Flue

 

pipe

 

runs

 

may

 

be

 

horizontal

 

or

 

vertical

 

and

 

terminate

 

either

 

through

 

the

 

wall

 

or

 

roof.

 

See

 

table

 

5

 

for

 

maximum

 

pipe

 

length

 

for

 

an

 

appliance

 

installed

 

as

 

type

 

B

 

or

 

table

 

6

 

for

 

maximum

 

lengths

 

and

 

approved

 

supplied

 

concentric

 

terminals

 

for

 

a

 

heater

 

installed

 

as

 

a

 

type

 

C

 

appliance.

 

All

 

pipe

 

runs

 

must

 

be

 

independently

 

supported

 

so

 

that

 

the

 

heater

 

does

 

not

 

carry

 

any

 

of

 

the

 

weight

 

of

 

the

 

flue

 

system.

 

4