Dunkirk Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler - Manual (Page 44)

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Figure 11-3 Condensate Trap - 050,075,100,150,200
Flue Pipe
Temperature
Sensor Hose Barb w/Cap
Coupling
Condensate Collector
Condensate
Trap Connection
To Condensate
Collector
Flexible Gas Line
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.
• Remove gasket and burner. Allow burner to clear top
lip of chassis.
• Remove any residual sleeve and/or gasket material
from removed burner.
• 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.
• 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.
• Remove any remaining loosened sediment using shop
vacuum with snorkel attachment.
• Clean condensate collector if significant debris found in
heat exchanger.
• Expand upper spring tension clip of condensate trap
using hose clamp pliers. Disconnect condensate trap
from condensate collector. See figures 11-3 & 11-4.
• Disconnect wire harness from vent temperature
sensor. See figure 11-3 .
• Loosen upper hose clamp securing condensate
collector to flue pipe using 3/8" socket with 6"
extension.
Figure 11-4 Condensate Trap - 299
11 - GENERAL MAINTENANCE AND CLEANING
Condensate Trap Connection
To Condensate Collector
Flexible Gas Line
Condensate Collector