Southbend CSC-24S, Руководство пользователя

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SERVICE INFORMATION
SECTION 6: MODELS: SC-2 & SC-3
CABINET CONTROL PROBLEMS
Safety Relief Valve blows and releases steam frequently
The Safety Relief Valve is set at 15 p.s.i. and is a protective device intended to prevent pressure from
exceeding 15 p.s.i. in the Heat Exchanger. During the operating 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 p.s.i. 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 p.s.i., then a lower
adjustment of the Pressure Switches are required. Remove Cover from Generator Control Box and locate
both switches at bottom left side of 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 either a 1/4" wrench or slotted screwdriver 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 Heat Exchanger
When the appliance is first turned ON. and assuming that water supply is definitely 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 up and
remain stuck in the upper position by sealant thereby falsely indicating sufficient water is present in the
Heat Exchanger. The Water Level Control Assembly must be detached, removed and thoroughly cleansed
to remove sealants and lime build up. Refer to Heat Exchanger on Removal of Sealants etc.. This
malfunction indicates extremely 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 Heat Exchanger, it is being drained through an
open Boiler Blow down Solenoid Valve which cannot close since it is not being energized either through
defective wiring or a burnt out coil.
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