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Global Power Technologies START-UP AND OPERATION
302842 Rev0 | Sentinel Page 22 of 61
4 START-UP AND OPERATION
Before initiating start-up of the Sentinel TEG, calculate the unit’s target OCV as referenced in Section
4.1. The result of this calculation will be used in later steps if it is determined that a fuel pressure
adjustment is required.
Before adjusting the fuel pressure, allow the Sentinel TEG to run for 90 minutes, then evaluate the
OCV. If the OCV is 23.6 VDC or greater and the fuel pressure is below 3.3 in.H
2
O after one hour of
operation, then no adjustment is required. From the factory, the Sentinel is set to deliver a minimum
of 10 Watts of net power to the customer load (BOCL).
4.1 ADJUSTING FOR SITE CONDITIONS AND DETERMINING TARGET OCV
CAUTION!
Do not make any fuel adjustments without first determining the target OCV.
The Sentinel TEG’s output power can change depending on the site’s ambient temperature and
altitude. Its open circuit voltage (OCV) is set at the factory based on the ambient temperature and the
factory altitude engraved in the Data Plate (see Figure 1). To accommodate for differences in site
ambient temperature and altitude, the Sentinel TEG’s fuel pressure is adjusted based on its target
OCV. The target OCV is calculated with the formula:
Target OCV = (Factory Set OCV) x (Temperature Correction Factor) x (Altitude Correction Factor)
To use this formula, first determine the site’s ambient temperature and altitude correction factors
from Section 4.1.1 and 4.1.2 below.