![Elster Eclipse AirHeat AH Operating Instructions Manual Download Page 10](http://html.mh-extra.com/html/elster/eclipse-airheat-ah/eclipse-airheat-ah_operating-instructions-manual_2396781010.webp)
10
AirHeat, V1, Operating Instructions, Edition 09.12
Figure 3. Mounting and Duct Lengths
Startup and Adjustment
Initial Settings
Adjust the linkage of the gas control valve so that when
heat is called for, the valve is 10° from fully open, and
when cooling is required, the valve is approximately 5°
from fully closed.
Close all manual gas cocks
With the pilot cock handle in the closed position, remove
the top screw and turn the adjusting screw five turns out
from fully closed. See Figure 4.
Figure 4. Pilot Cock
Start Blower
Start the combustion air blower on the burner. Check the
rotation to make sure it is correct. If not, have a qualified
electrician rewire the blower for proper rotation.
Start Circulation Fan
Start the duct circulation fan.
Set Air Pressure Drop
Measure the air pressure drop across the burner as
shown in Figure 5.
Turn the disc on the blower air inlet until the air pressure
drop is between 0.4 ”w.c. (1 mbar) minimum and 1.0 ”w.c.
(2.5 mbar) maximum. For a given input, lower air pressure
drops will produce a longer flame, and higher drops will
produce a shorter flame.
Large Burners Only:
Some models, such as the 640,
680, and 720 TAH burners, contain a butterfly valve in the
check valve line. On these models, after setting the air
flow as described in the previous paragraph, measure the
air pressure drop between the gas pressure tap and the
duct as shown in Figure 5. Gas flow must be off. Adjust
the butterfly valve to produce an air pressure drop of 0.2
”w.c. (0.5 mbar).
Figure 5. Pressure Measurement
Minimum Distance Before
Possible Flame Impingement = 3.8 ft (1.17 m)
AH
Burner
Minimum distance before transition
Rectangular ducts: one height or width, whichever is greater
Round ducts: one diameter
7.5°
Maximum
Air Flow
Duct Lengths
Top Screw
Handle
(Shown in
Open Position)
Adjusting Screw
(Clockwise for less pilot gas,
Counterclockwise for more pilot gas)
Gas
Pressure
Tap
Duct Tap
10" to 20" (250-500mm)
Downstream of Burner
Air Pressure
Taps (2)
Summary of Contents for Eclipse AirHeat AH
Page 13: ...Notes i ...