Modulex Light Commercial Series
CHAPTER 9: Spare Parts Drawings and Lists
OMM-0158_A
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8.4 Checking Csd-1 Manifold Flow Switch
Check the function of the flow switch in the CSD-1 manifoild at the boiler hot water outlet. If it is
not functioning, check the wiring to terminals FL and 10 on the Input/Output box or replace with
a new flow switch.
8.5 Visual Inspection Of The Flame
The burner must flame evenly over the entire surface when operating correctly. The flame must
burn with a clear, ORANGE, stable flame. Check the flame through the flame observation port
(Figure 8-2). The flame pattern should resemble the flame in the illustration below.
FLAME COLOR:
•
YELLOW
= CO2 HIGH NOT SATISFACTORY
•
BLUE
= CO2 LOW NOT SATISFACTORY
•
ORANGE
= OK
SATISFACTORY
Figure 8-2: Boiler Flame Observation Port Location
8.6 Reassembly And Resealing Of Vent-Air Intake System
After removing, inspecting, and possibly cleaning the flue pipes and air intake, replace the
piping correctly. Refer to AERCO Venting Application Guide (TAG-0098) for information
concerning Modulex venting requirements.
Flame Observation Port
Igniter Cable
Flame Detector
