Aerco Modulex MLX-303 User Manual

MC2: 10/03/12 Page 48 of 90
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
GF-115-H
OMM-0083_0B
Modulex MLX Series Gas Fired Boiler System
Operation and Maintenance Manual
Chap 9:
Maintenance
Contact your local AERCO representative to order your kit.
9.2 Annual Maintenance Instructions
Following are the procedures necessary to perform the annual maintenance on all Modulex MLX boiler
models and sizes.
A correctly adjusted Modulex boiler needs very little care other than yearly maintenance. The frequency
of cleaning needed depends on the cleanliness of the air used for combustion. Note that dust present in
the air at the combustion intake will result in reduced burn efficiency and, consequently, reduced heat
output.
Annual maintenance consists of a number of recommended and required tasks as listed below. This
section provides instructions for the yearly requirement of inspection, and if necessary, replacement of
the igniter and flame detector for each burner section.
9.2.1 REQUIRED Tasks:
• Inspect air filters (replace if needed, AERCO P/N 95261879)
• Inspect condensate drain lines (clean if needed)
• Check for gas leaks using a soapy solution
• Inspect igniter and flame sensor (replace, Igniter: P/N 95251245, Detector: P/N 95251246)
• Check pH of boiler system water (refer to Appendix C, Boiler Water Chemistry and Maintenance)
• Check flame detection circuitry (See paragraph 9.2.3)
9.2.2 RECOMMENDED Tasks:
• Inspect vent pipe (clean if needed)
• Inspect flue collector & condensate tray (clean if needed) (see paragraph 9.3.6)
• Wash heat exchanger (clean if needed) (see paragraph 9.3.3)
• Check and adjust air/fuel ratio (see paragraph 7.5.5)
• Inspect and clean burner surface (see paragraph 9.3.3)
• Inspect heat transfer surfaces (clean if needed)
• Clean strainer mesh (Monthly)
• Check inlet gas pressure. Changes in gas pressure require combustion recalibration (see
paragraph 7.5.5)
• Check vent and inlet air terminations
• Check electrical supply voltages
9.2.3 Tools Required
Common hand tools, plus a spark gap feeler gauge are required to perform the annual maintenance tasks
described in this bulletin.
Prior to performing the following disassembly and inspection procedures,
ensure that all electrical power to the boiler has been turned off and the
external gas shut-off valve is fully closed.
WARNING
!
!

Aerco Modulex MLX-303 Specifications

General

Brand	Aerco
Model	Modulex MLX-303
Category	Boiler
Language	English