AERCO Esteem O&M Manual - Manual (Page 48)

42
Final Checks Before Start-Up
 Read Operating Instructions beginning
on page 47 regarding the operation of the
Esteem 399 Low NOx controls.
 Verify the Esteem 399 Low NOx and the
boiler system are full of water and all
system components are correctly set for
operation, including the minimum fl ow
rate through the boiler, see page 91.
 Verify Start-up Preparation items outlined on
page 39 through page 41 have been completed.
 Verify all electrical connections are cor-
rect and securely fastened.
 Inspect vent and combustion air piping for
signs of deterioration from corrosion, physi-
cal damage or sagging. Verify combustion
air and vent piping are intact and correctly
installed and supported. See the Esteem
399 Low NOx vent supplement GF-125V.
 Verify burner confi guration - Propane
only.
• Check for proper labeling on the gas
valve and the rating label for propane
configuration.
• If there is doubt on the burner configura-
tion, remove the gas valve and check
for proper propane gas orifice size: 6.7
mm for Esteem 399 Low NOx . Refer to
Figure 18, page 31 for location of the pro-
pane gas orifice.
N
OTICE
For natural gas applications the Esteem
399 Low NOx requires an orifi ce: 0.330”
(8.6 mm)
 Ensure the vent Condensate Drain As-
sembly is fi lled with water.
Esteem 399 Low NOx Start-Up
4. Turn the ON-OFF switch located on the
front control panel to the OFF position.
Turn ON the electrical supply/service to the
unit.
5. Read and follow the Operating
Instructions outlined on page 47.
If Esteem 399 Low NOx Does Not Start
Correctly
• Make sure the heating thermostats are set
above room temperature,
• Check that gas supply valve(s) are open at
the unit and meter.
• Verify DHW (parameter 2) and space
heating (parameter 3) systems are turned
ON or set to “01”. Read the Boiler Display
Standby and Parameter Section of the
manual starting on page 49 for more infor-
mation.
• Check for loose electrical connections,
blown fuse (external or internal to the
MCBA Control) or open service switch.
• Check continuity across the LWCO device
for a closed circuit. See item 6 Figure 29,
page 86.
• if applicable, ensure the external limit is
reset to the closed position.
• Ensure incoming gas supply pressure at
the unit is more than 5”w.c. and less than
13” w.c. for natural or propane with all gas
appliances ON or OFF.
If none of these conditions correct the prob-
lem, refer to the Esteem 399 Low NOx
Trouble-Shooting Guide or contact AERCO
International Tech Service. (800) 526-0288
Please have unit model and serial numbers
when you call.
Chapter 11 Start-Up Procedures
GF-125