Ambirad ARE22 U 설치 및 서비스 매뉴얼 - 페이지 16

{카테고리_이름} Ambirad ARE22 U에 대한 설치 및 서비스 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Ambirad ARE22 U 20 페이지. Gas fired radiant tube heaters

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15 Commissioning for individually

flued and unflued heaters

Inspect installation and ensure that it has

been carried out in accordance with these

instructions. Ensure that electrical and gas

supplies are isolated. The gas supply should

be purged and tested for soundness in

accordance with the BS 6891:1988, BGIM/16,

IGE Report 1M/2 and any other British

Standard and Codes of Practice. Open

isolating valve.

Remove the combustion chamber cover plate

or ducted air inlet connection by unscrewing

6 fixing screws. Take care not to damage the

sealing gasket. Inspect the burner and

electrode assemblies, ensuring these are

securely fixed and all electrical connections

securely made. Replace the cover plate or

ducted air inlet connection, ensuring that the

sealing gasket is correctly positioned and the

six screws are fully tightened. The heater will

not operate until this plate is refitted.

Open the control housing cover door by

unscrewing the securing screw. Ensure all

internal components are securely fixed and

all connections securely made.

Switch on the electrical supply to the heater

and observe the correct start up sequence

as follows:

The mains lamp (red) will illuminate. The ID

fan will start to run and the vacuum switch

checking relay (inside flame electronic

sequence control box) will pull in. Safe-start

checks are carried out automatically and a

purge period of approximately 9 seconds will

commence.

At the end of the purge period the ignition

sequence will commence. The spark ignition

will be energised producing a spark at the

ignition electrode. The gas shut off valve will

at the same time be energised. If ignition is

successful the flame is detected by the flame

sensing probe and the ignition spark will be

switched off. The 'burner on' (amber) lamp

indicates that the gas safety control valves

are energised.

If the ignition is unsuccessful the gas safety

control valve is closed and the spark ignition

de-energised after approximately 5 to 7

seconds. After an unsuccessful ignition

attempt the electronic sequence controller

will 'lock-out' . The 'power lamp' (red) only

will remain illuminated and the fan will

continue to run. To reset this 'lock-out'

condition, switch the power supply to the

heater, wait 15 seconds then restore it. If

repeated lock-out occurs investigate cause.

In the event of an electrical fault after

installation of the appliance preliminary

electrical systems checks should be carried

out (re-earth continuity polarity and

resistance to earth).

To shut down the heater, switch off the

power supply to the heater. Automatic

control of the heater or a series of heaters

may be achieved by incorporating

thermostats, time switches, frost thermostats,

manual over-ride switches etc., in the

electrical supply to the heater(s). It is essential

to allow a delay of 15 seconds after switching

off a heater before attempting to restart.

If at any time after completion of the start

up sequences, loss of flame should occur,

the electronic sequence controller will

attempt to re-ignite. If this is unsuccessful

lock-out will occur.

Set burner gas pressure as follows. Isolate gas

supply. Unplug mains input connector to

heater. Unscrew the fixing screw in the

hinged safety control housing lid and swing

away. Remove pressure test point screw

nearest the burner head and connect a 'U'

tube manometer to the pressure test nipple

located on the body of the gas valves.

Remove the slotted cover from the pressure

test regulator revealing the adjustable screw.

Replace mains input connector and start the

heater. Using a suitable screwdriver adjust

the pressure regulator. Switch off the heater

by pulling out the mains input connector.

Disconnect 'U' tube manometer and refit

screw in pressure test nipple. Replace cover

on pressure regulator. If heater is flued

check that there is adequate updraught

at the down-draught diverter eg. by means

of a smoking taper when heater is running.

Check the operation of the flame safe guard

equipment as follows. With the heater

running normally, switch off the gas supply

at the appliance isolating valve. Observe that

the 'burner on' lamp extinguishes within one

second. After a purge period of

approximately 9 seconds the heater should

attempt to re-light and if the gas isolating

valve has been left off, lock-out should

occur indicated by power light only being

illuminated and fan running.

Check the operation of the vacuum proving

switch as follows. With the heater running

normally pull out the three pin fan

connection plug, thus causing the fan to

slow down and stop. Within 3 seconds the

burner should shut off. Observe for at least

20 seconds that there is no attempt to

re-ignite, then replace the three pin plug

and observe that the heater proceeds to

ignite in the normal way.

Close the safety control housing lid which is

secured with the fixing screw.

Hand the 'User Instructions' to the user and

explain how to operate the heater.

Leave the 'Installation and Servicing

Instructions' at the user's meter or

preferably with the service/maintenance

engineer/manager for use on future service

calls.

Note It will be noted that heaters have a

tendency to bow when hot, this is normal

and quite acceptable.