Global Sentinel, Руководство по эксплуатации, Страница: 40 / 70

Global Power Technologies MAINTENANCE
302842 Rev0 | Sentinel Page 33 of 61
5 MAINTENANCE
WARNING!
Read all product documentation before performing service or maintenance on the
Sentinel TEG and ensure that you are thoroughly familiar with the product’s sub-
systems and key components. Service and maintenance of the Sentinel TEG must
be performed by technically qualified personnel as outlined in Section 1.2.
5.1 RECOMMENDED PERIODIC MAINTENANCE
The Sentinel Thermoelectric Generator is a highly reliable, solid-state appliance that requires very
little maintenance; however, it should be checked regularly to ensure product longevity. The
maintenance frequency on the Sentinel may vary depending on site conditions and usage. As a
minimum, perform the following checks and maintenance once per year.
1. Verify Open Circuit Voltage:
a.
Determine OCV target based on ambient temperature and altitude – refer to Section 4.1.
b. Determine OCV degradation due to days of operation – refer to Section 5.1.2.
c. Measure OCV – refer to Section 4.3.2.
d. Compare measurement and target.
e. If the measured OCV differs by more than 1 VDC from the calculated target OCV, adjust the fuel
pressure – refer to Section 4.3.3.
f. If target OCV cannot be achieved, see Troubleshooting – refer to Section 6.
2. Replace the fuel filter cartridge— refer to section 5.2.1. Remember that fuel outside of the
specifications outlined in Section 2.3 may increase service interval.
3. Check all fuel line connections for leaks.
4. Remove any debris, sand or dust from the inlet screen, cooling fins, cabinet, and ducts.
5. Check all bolts and wire connections for tightness.
6. Restart the TEG— refer to section 4.2.
5.1.1 START-UP BATTERY PACK REPLACEMENT INTERVAL
Replace start-up battery pack during an annual maintenance every 5 years of service.
5.1.2 DETERMINING OCV VALUE AFTER CATALYTIC HEATER CARTRIDGE DEGRADATION
To determine OCV value after operating the Sentinel Catalyst Cartridge for some time:
1. Determine correction factors for current site conditions as described in Section 4.1. Correction Factors
can be combined into a single value by multiplying the 2 factors. For example: Temperature correction
factor = 0.90 and Altitude correction factor = 0.95, overall correction factor = 0.90 * 0.95 = 0.855.
2. Determine number of days of operation of the Catalyst cartridge – refer to MAINTENANCE AND
PERFORMANCE LOG.
Use Figure 21 to determine target OCV based on correction factors and days of operation. For
example: using example in step 1, overall correction factor = 0.855 (we will round to 0.85) and days of
operation = 250 days. Target OCV based on CF 0.85 line of chart = ~17.6 VDC.