Ambirad COBRA CB40 Manuel d'installation, d'utilisation, de maintenance et d'entretien - Page 10

Parcourez en ligne ou téléchargez le pdf Manuel d'installation, d'utilisation, de maintenance et d'entretien pour {nom_de_la_catégorie} Ambirad COBRA CB40. Ambirad COBRA CB40 19 pages. Gas fired radiant tube heaters

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Slacken 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 valve. (See

figure 8).

Access to the pressure regulator adjustable

screw is via a hole in the side of the

burner box.

Figure 9

Replace mains input connector and start

the heater. Using a suitable screwdriver

adjust the pressure regulator if necessary

set pressure as stated on data label.

Switch off the heater by pulling out the

mains input connector. Disconnect 'U'

tube manometer and tighten screw in

pressure test nipple.

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 the valve. Check the operation of

the vacuum proving switch as follows;

With the heater running 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

slow down and stop. Within 3 seconds

the burner should shut off.

Observe for at least 20 seconds that there

is not attempt to re-ignite , then replace

the three pin plug and observe that the

heater proceeds to ignite in the normal

way.

Hand the 'User Instructions' to the user

and explain how to operate the heater and

controls.

Leave the 'Installation and Servicing

Instructions' at the users meter or

preferably with the service / maintenance

engineer / manager for use on future

service calls.

Note Heaters have a tendency for the

tube and 'U' bend to glow. This is normal

and quite acceptable.

13Routine service

Frequency of servicing

The manufacturer recommends that to

ensure continued efficient and safe

operation of the Cobra it is recommended

that the heater is serviced regularly by a

competent person e.g every year in normal

working conditions but in exceptional

dusty or polluted conditions more

frequent servicing may be required. The

manufacturer offers a maintenance

service. Details are available on request.

Tools required for servicing

The tools required to carry out any

servicing of the Cobra range of heaters are

as follows; electrical screwdriver, 13mm

spanner, 10mm spanner, 8mm spanner,

cross head screwdriver, flat blade

screwdriver, adjustable spanner, pipe

wrench, soft bristle brush; and a soft cloth.

Health and safety

Isolate gas and electrical supplies before

carrying out any repair work. Always test

for gas soundness with a suitable leak

detection fluid.

To remove the burner assembly

proceed as follows;

Remove the fixing screws securing the

ball guard. (See section 10).

Figure 10

Drop down access door on front of heater

by releasing the quarter turn fixings.

Figure 11

Unplug the mains and fan leads from the

burner assembly. Disconnect wiring to

neon lamps. Disconnect the gas feed pipe

at the gas valve.

Figure 12

Slacken the pinch screws at the front of

the burner securing the burner to the

heater firing leg. Remove flexible

ducting to fan by slackening hose clamp.

Figure 13

Slide the burner assembly back towards

the front of the product until the

burner spigot disengages from the

firing tube. Slide the burner assembly

away from the product.