Roberts Gorden MGB Series Manual de servicio descargar pdf (Pagina 69)

SECTION 15: REMOVAL AND REPLACEMENT PARTS

63 of 85

SECTION 15: REMOVAL AND REPLACEMENT PARTS

See warnings and important information before

removing or replacing parts.

After any maintenance or repair work, always test

fire the heater in accordance with the commissioning

instructions on Page 40, Section 10 to help ensure

all safety systems are in working order before

leaving the heater to operate. Minor faults may be

traced by using the troubleshooting charts on Page

58, Section 14.2 through on Page 62, Section 14.7.

15.1 Burner Components

To re move the burner from the heater:

1. Unplug the burner electrical supply from the

heater.

2. Isolate the fuel supply at the inlet manual valve

and disconnect the inlet fuel pipe.

3. Unscrew the nuts holding the burner mounting

flange to the heater.

4. Remove the bu rner from the heater, retaining

the gasket for reuse.

For removal of burner components, follow the burner

manu

facturer’s instructions. To refit the burner,

reverse the instru ctions above. Fit the gasket

between the burner mounting flange and the heater.

Use a new gasket, if necessary.

15.2 Direct On-Line Main Fan Starter and

Thermal Overload Unit (3 Ø)

This assembly comprises two parts, the contactor

and the overloads, which may be changed

separately.

15.2.1 The Contactor

To re m o ve the contactor:

1. R e m o ve the overloads as on Page 63, Section

15.2.2.

2. Remove the line connections to the top of the

contactor (noting the colour code) and the two

coil connections at the top rear of the contactor.

3. Unscrew the fixing screws to remove the con-

tactor from the panel.

4. Reverse these instructions to refit. Check rota-

tion of the fan after working on the contactor.

15.2.2 The Overloads (models 060 to 100)

To re m o ve the overloads:

1. U n s c r e w the motor connecting wires from their

terminals at the bottom of the assembly. Note

the colour code.

2. Disconnect the overload circuit connections

near the overload reset button.

WARNING

Cut/Pinch Hazard

Wear protective gear during installation,

operation and service.

Edges are sharp.

Failure to follow these instructions can result

in injury.

Carbon Monoxide Hazard

WARNING

Use only genuine ROBERTS GORDON

replacement parts per this installation, operation and

service manual.

Failure to follow these instructions can result in death, electric shock, injury or property damage.

Explosion Hazard

DANGER

Electrical Shock Hazard

Fire Hazard

WARNING

Severe Injury Hazard

Use proper lifting practices and equipment.

Equipment and accessories are heavy.

Failure to follow these instructions can result

in death, injury or property damage.

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Roberts Gorden MGB Series Manual de servicio Pagina 69

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