HELIX VX-399 Installation, Operation & Maintanance Manual page 42

Figure 11-2 Condensate Trap (Left Side Shown)
Hose
Removed
From Hose
Condensate Trap
Barb with
Spring
Tension Clip
Note - Condensate Trap
option left or right side.
11 - GENERAL MAINTENANCE AND CLEANING
Hose
Drain Valve
Removed
From Hose
Barb with
Spring Tension
Clip
11.2 Annual Shut Down Procedure
• Follow instructions "To Turn Off Gas To Appliance"
unless boiler is also used to supply domestic hot water.
See section 10.
• Drain system completely if system does not have
antifreeze when heating system is to remain out of
service during freezing weather.
• Drain condensate lines when boiler is to be exposed to
freezing temperatures.
!
WARNING
Following service procedures must be performed
by qualified service agent. Boiler owner shall not
attempt these steps. Failure to do so could result in
death or serious injury.
11.3 Annual Inspection and Cleaning of Boiler
Components
• Obtain Burner Inspection Kit. Follow kit instructions to
prepare for examination and cleaning.
• Burner and heat exchanger inspection and cleaning.
A. Remove gasket and burner. Allow burner to clear
top lip of chassis.
B. Remove any residual sleeve and/or gasket material
from removed burner.
C. Clean burner using air hose directed into top of
burner opening to dislodge any debris in burner
ports. Inspect burner for foreign matter in flame
ports or inside burner. Remove foreign matter
by blowing with compressed air or vacuuming.
Replace burner if it cannot be cleaned or is showing
deterioration.
D. Clean heat exchanger with low pressure water
spray. Use flexible handle nylon brush to loosen
sediment and oxide on all accessible heating
surfaces of heat exchanger. Take care not to get
brush stuck in heat exchanger.
E. Remove any remaining loosened sediment using
shop vacuum with snorkel attachment.
F. Flush condensate collector if significant debris found
in heat exchanger.
G. Expand upper spring tension clip of condensate trap
using hose clamp pliers. Disconnect condensate trap
from condensate collector. See Figure 11-2.
H. Disconnect wire harness from vent temperature
sensor. See figure 11-2.
I. Flush collector and condensate trap with water.
Allow water to drain through condensate collector
port.
• Follow Burner Inspection Kit instructions to reassemble
boiler and resume operation.
42
P/N 240010943, Rev. C [09/07/2016]