Southbend GCX-2S, Руководство пользователя

Страница: 19 / 38

SERVICE INFORMATION
SECTION 6:
STEAM-EX MODEL GCX-2
FLOOR MOUNTED CONVECTION STEAMER
CABINET CONTROL PROBLEMS
SAFETY RELIEF VALVE BLOWS AND RELEASES STEAM FREQUENTLY
The Safety Relief Valve, set at 15 psi, is a protective device intended to prevent pressure from exceeding 15 psi in the
Boiler. During the operation cycle observe the fluctuating pressure range as indicated on the Pressure Gauge located
directly on top of the Water Level Control. The fluctuating range should read approximately 9 to 12 psi during a normal
operating cycle and if the Safety Relief Valve blows prematurely then assume it must be defective and requires
replacement.
However, if the pressure reading, indicated on the Pressure Gauge approaches 15 psi then lower adjustments of the
Pressure Switches are required. Remove Cover from Generator Control box and locate both switches at bottom left side
on Control box. When facing Pressure Switch in the upright position, the adjusting nut on the higher top point to the back
controls the high pressure setting of that switch and the adjusting nut on the lower top surface to the front of the switch
controls the low pressure setting of that switch. Both nuts when turned counter clockwise with a 1/4" wrench will lower
the pressure settings. Refer to Periodic Maintenance Section 4, for proper pressure settings. Each nut should be turned
slightly and the pressure reading on the Gauge observed before adjusting the next nut unnecessarily.
WATER IS NOT BEING SUPPLIED TO BOILER
When the appliance is first turned ON, and assuming that water supply is definitly available to the appliance, and after 20
minutes no water can be observed in the Water Gauge Assembly then either the Solenoid (Hot Water) Valve is defective
or is incapable of being energized by the Water Level Control. As mentioned previously, the float within the chamber of
the Water Level Control may be seized and remain stuck in the upper position by scalant thereby falsely indicated
sufficient water is present in the Boiler. The Water Level Control Assembly must be detached, removed and thoroughly
cleansed to remove scalants and lime build up. Refer to Boiler on Removal of Scalants etc.. This malfunction indicates
extemely poor water quality being supplied to the appliance and must be attended to immediately to avoid complete
breakdown of the appliance.
Another possibility is that as quickly as water is fed to the Boiler it is being drained through an open Boiler Blowdown
Solenoid Valve which cannot close since it is not being energized either through defective wiring, a burnt out coil or the
inability of the valve to close completely. This valve contains a moveable blade and when de-engergized the blade reacts
as a guillotine which should be free to move fully down into the valve pocket (projection at bottom of valve) so that the
perced hole in the blade aligns perfectly with the body opening. If debris has accumulated in the bottom of the valve
pocket then blade obviously will be impeded from moving into pocket completely. Further, a burnt out valve coil is likely.
With valve removed from Cooker body remove retaining clip at top of solenoid. Grasp (green) cover and housing intact
with coil inside and slide off from valve.
(Continued)
17