Gulfstream GS A-Class 12/OV, Инструкции по проектированию, установке и обслуживанию

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Page 35
GULFSTREAM
A-CL
ASS
(b) To remove the actuator press in (forward) the latch mechanism to the centre
rear of the actuator. At the same time press the actuator towards the body of
the valve and turn the actuator counter clockwise (to the left) by 45 degrees (1/8
turn). Pull the actuator away from the body.
(c) Replace the actuator and reassemble in reverse order.
7.29 3-WAY DIVERTER VALVE BODY
(a) Any faults with the valve itself are overcome by replacing the removable internal
cartridge.
(b) Other than due to a faulty casting/leaking joint there should be no need to replace
the valve body itself.
(c) Instructions for replacing the cartridge and the necessary removal tool are all
provided with the replacement cartridge.
(d) Before replacing the cartridge isolate the appliance from the heating system.
(e) With the SP model open the safety valve to release any internal pressure and
isolate the cold supply at the quarter turn valve on the inlet to the CA valve.
(f) With the OV model shut off the servicing valve on the cold inlet to the ball-valve
in the F & E cistern in both cases then drain down the boiler to below the level
of the 3-way valve.
(g) Remove the actuator following the instructions above and then remove the
cartridge using the special tool provided.
(h) Replace if necessary the cartridge and reassemble in reverse order.
(i) UNDERTAKE WATER SOUNDNESS CHECK.
(j) Check boiler/controls operation.
7.30 ELECTRICAL CONTACTOR (Figure 6.5)
(a) Release the wires from the terminals on both sides of the 25 amp contactor.
(b) Insert a 4mm slotted head screwdriver into the release tab below the contactor
and push down.
(c) Pull the contactor upwards and lift off the mounting rail.
(d) Replace and reassemble in reverse order ensuring the tab clips back into position
and all wiring connections are tight.
(e) Check boiler/controls operation.
7.31 M.C.B. – REMOVAL
(a) Release the wires from the terminals on both sides of the MCB and remove the
bus bar from the inlet (bottom).
(b) Insert a 4mm slotted head screwdriver into the release tab below the MCB and
push down.
(c) Pull the MCB upwards and lift off from the mounting rail.
(d) Replace and reassemble in reverse order ensuring the tab clips back into position
and all wiring connections are tight.
(e) Check boiler/controls operation.
Figure 6.4 Diverter Valve Actuator
Figure 6.5 25A Contactor
SERVICING AND CHANGING COMPONENTS
Latch mechanism
Pull out
latch