AERCO Esteem O&M Manual - Manual (Page 37)

31
Propane Gas
Figure 18: Gas Valve / Venturi Assembly
Propane Gas
N
OTICE
The propane orifi ce required for the Es-
teem 399 Low NOx is 0.264” (6.7 mm)
WARNING!
DO NOT
ADJUST OR ATTEMPT TO MEASURE
GAS VALVE OUTLET PRESSURE
. T
HE GAS VALVE
IS FACTORY
-
SET
. T
HIS SETTING IS SUITABLE
FOR NATURAL GAS AND PROPANE AND RE
-
QUIRES NO FIELD ADJUSTMENT
. A
TTEMPTS TO
ADJUST OR MEASURE THE GAS VALVE OUTLET
PRESSURE COULD RESULT IN DAMAGE TO THE
VALVE
,
CAUSING POTENTIAL PROPERTY DAMAGE
PERSONAL INJURY
,
OR DEATH
.
On propane gas applications the incoming gas
regulator should be installed as follows:
• Size the regulator for the appropriate fl ow.
• The regulator diaphragm should be in-
stalled horizontally
• Piping before and after the regulator
should be straight rigid pipe for a minimum
of 10 pipe diameters.
• Avoid fl exible pipe between boiler and the
outlet of the regulator.
• If regulator is installed and vented inside, a
vent limiter should be used.
• If regulator is installed or vented outside,
an inverted trap piping arrangement
should be used.
WARNING
P
RIOR TO START UP
,
ENSURE THE UNIT IS SET
TO FIRE PROPANE
. C
HECK THE RATING LABEL
FOR THE TYPE OF FUEL
. C
HECK THE GAS VALVE
FOR PROPANE CONVERSION LABEL
. I
F THERE
IS A CONFLICT OR DOUBT ON THE BURNER SET
UP
,
REMOVE THE GAS VALVE AND CHECK FOR
THE PROPANE ORIFICE
,
SEE
F
IGURE
18,
PAGE
31. F
AILURE TO ENSURE PROPER BURNER SETUP
COULD RESULT IN PROPERTY DAMAGE PERSON
-
AL INJURY
,
OR DEATH
.
GF-125