Lochinvar EnergyRite ER152 Service Manual page 19

2
Maintenance
Differential air pressure measurement
The differential air pressure measurement can be checked
with a slack tube manometer (FIG. 2-8). Disconnect the
two tubes from the air pressure switch and connect one to
each side of a manometer. Turn on the pool heater and
allow the combustion air fan to operate. The observed
pressure reading on the manometer should correspond to
the range shown in Table 2C - Differential Air Chart if the
air shutter is properly adjusted. The differential pressure
varies based on air density at elevation.
Figure 2-8_Air Shutter Pressure Measurement
TABLE - 2C
DIFFERENTIAL AIR CHART
Differential Air
1.65" - 1.80" w.c.
1.40" - 1.60" w.c.
1.20" - 1.40" w.c.
(continued)
Gas train and controls
Figure 2-9_Gas Train Drawing
Elevation
0 - 4,000'
4,000' - 8,000'
8,000' - 12,000'
The gas train and controls assembly
NOTICE
provided on this pool heater have been
tested under the applicable American
National Standard to meet minimum safety
and performance criteria such as safe
lighting, combustion, and safety shutdown
operation.
Service Manual
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