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

1704VRC3-AMEN, p 22/35 

 

*

 

Carry

 

out

 

a

 

polarity

 

test.

 

Connect

 

one

 

lead

 

of

 

a

 

suitable

 

AC

 

voltmeter

 

to

 

earth

 

and

 

connect

 

the

 

other

 

lead

 

to

 

the

 

live

 

supply

 

terminal

 

(L)

 

at

 

the

 

air

 

heater.

 

Switch

 

ON

 

the

 

power

 

to

 

the

 

air

 

heater

 

and

 

check

 

for

 

correct

 

voltage.

 

 

 

The

 

same

 

result

 

should

 

be

 

obtained

 

by

 

connecting

 

the

 

test

 

leads

 

between

 

live

 

and

 

neutral.

 

 

 

Connect

 

the

 

voltmeter

 

test

 

leads

 

to

 

N

 

and

 

E.

 

A

 

reading

 

of

   

0V

 

should

 

be

 

obtained.

 

If

 

these

 

tests

 

do

 

not

 

conform

 

to

 

the

 

above,

 

there

 

is

 

a

 

fault

 

which

 

must

 

be

 

rectified

 

before

 

proceeding

 

further

 

with

 

the

 

commissioning;

 

*

 

Check

 

that

 

a

 

suitable

 

thermostat

 

or

 

control

 

panel

 

has

 

been

 

fitted;

 

*

 

Ensure

 

that

 

an

 

electrical

 

isolator

 

with

 

two

 

pole

 

separation

 

with

 

a

 

minimum

 

air

 

break

 

between

 

poles

 

of

 

3,0

 

mm

 

has

 

been

 

fitted

 

adjacent

 

to

 

the

 

air

 

heater.

 

 
 

6.2

 

Gas

 

connection

 

 

Only

 

persons

 

formally

 

qualified

 

to

 

work

  

on

 

gas

 

fired

 

apparatus

 

may

 

carry

 

out

 

commissioning

 

and

 

testing.

 

The

 

whole

 

of

 

the

 

gas

 

service

 

installation

 

including

 

the

 

meter

 

must

 

be

 

inspected,

 

tested

 

for

 

soundness

 

and

 

purged

 

in

 

accordance

 

with

 

appropriate

 

requirements

 

by

 

a

 

qualified

 

person.

 

 
 

6.3

 

Suspension

 

and

 

support

 

 

Check

 

to

 

ensure

 

that

 

the

 

air

 

heater

 

is

 

adequately

 

suspended

 

or

 

supported

 

and

 

that

 

no

 

other

 

parts

 

have

 

been

 

fitted

 

that

 

are

 

not

 

independently

 

supported

 

and

 

secured.

 

For

 

safe

 

and

 

correct

 

operation,

 

check

 

the

 

heater

 

is

 

level

 

in

 

both

 

planes.

 

 
 

6.4

 

Lighting

 

the

 

air

 

heater

 

 

VRC

‐

3

 

air

 

heaters

 

are

 

all

 

fitted

 

with

 

automatic

 

spark

 

ignition

 

systems.

 

When

 

adequate

 

airflow

 

for

 

combustion

 

is

 

proven

 

by

 

an

 

air

 

proving

 

control

 

and

 

a

 

pre

‐

purge

 

period

 

has

 

elapsed,

 

the

 

integral

 

ignitor

 

and

 

multi

‐

functional

 

gas

 

control

 

operate.

 

The

 

ignition

 

spark

 

ignites

 

the

 

gas

 

creating

 

the

 

burner

 

flame

 

which

 

is

 

detected

 

by

 

a

 

flame

 

rod

 

sensor.

 

If

 

a

 

burner

 

flame

 

is

 

not

 

detected,

 

the

 

ignition

 

controller

 

proceeds

 

to

 

lock

‐

out

 

and

 

requires

 

manually

 

resetting.

 

Lock

‐

out

 

is

 

indicated

 

by

 

the

 

red

 

warning

 

light

 

on

 

the

 

air

 

heater.

 

If

 

the

 

first

 

reset

 

is

 

not

 

successful,

 

wait

 

15

 

seconds

 

before

 

attempting

 

reset.

 

 

6.4.1

 

To

 

turn

 

the

 

air

 

heater

 

"ON"

 

The

 

following

 

checks

 

should

 

be

 

carried

 

out

 

before

 

attempting

 

to

 

light

 

the

 

air

 

heater.

 

*

  

Ensure

 

that

 

the

 

gas

 

supply

 

to

 

the

 

air

 

heater

 

is

 

turned

 

ON;

 

*

  

Ensure

 

that

 

the

 

electrical

 

supply

 

to

 

the

 

air

 

heater

 

is

 

switched

 

ON;

 

*

  

If

 

fitted

 

ensure

 

that

 

a

 

time

 

switch

 

is

 

set

 

to

 

an

 

ON

 

period

 

*

  

Set

 

room

 

thermostat

 

to

 

call

 

for

 

heat.

 

e.g.

 

to

 

above

 

room

 

ambient

 

temperature.

 

The

 

burner

 

will

 

now

 

light.

 

   

The

 

burners

 

can

 

be

 

seen

 

through

 

the

 

viewing

 

port.

  

*

  

Adjust

 

the

 

room

 

thermostat

 

to

 

the

 

required

 

operating

 

comfort

 

temperature.

 

The

 

air

 

heater

 

will

 

now

 

start

 

automatically

 

when

 

heat

 

is

 

called

 

for

 

by

 

the

 

room

 

thermostat.

 

Note

 

:

 

If

 

the

 

air

 

heater

 

will

 

not

 

start

 

on

 

initial

 

start

‐

up,

 

the

 

ignition

 

controller

 

may

 

be

 

in

 

lock

‐

out

 

position

 

and

 

require

 

resetting.

 

This

 

may

 

occur

 

especially

 

if

 

the

 

appliance

 

has

 

been

 

on

 

stand

‐

by

 

for

 

a

 

prolonged

 

period.

 

 

6.4.2

 

To

 

turn

 

the

 

air

 

heater

 

"OFF"

 

for

 

short

 

periods

 

Adjust

 

the

 

room

 

thermostat

 

to

 

its

 

lowest

 

setting

 

or

 

'OFF'.

 

The

 

fan

 

will

 

continue

 

to

 

run

 

to

 

cool

 

the

 

heater

 

and

 

then

 

switch

 

OFF

 

automatically.

 

 

6.4.3

 

To

 

turn

 

the

 

air

 

heater

 

"OFF"

 

for

 

long

 

periods

 

Adjust

 

the

 

room

 

thermostat

 

to

 

OFF

 

or

 

its

 

lowest

 

setting.

 

When

 

the

 

fan

 

has

 

stopped,

 

turn

 

OFF

 

the

 

gas

 

supply

 

and

 

then

 

switch

 

OFF

 

the

 

electricity

 

supply

 

to

 

the

 

air

 

heater.

 

 

Never

 

use

 

a

 

flame

 

for

 

checking

  

gas

 

soundness.