Dunkirk Helix VX Vertical Laser Tube Wall Hung Stainless Steel Modulating Condensing Boiler - Manual (Page 7)

7
3.1 Component Listing - Refer to diagrams on
following pages.
1. Gas Shutoff Valve (Field Installed) Fuel supply
isolation during servicing. Factory supplied, Field installed.
See section 7.
2. Vent Connector See section 6.
3. Combustion Air Inlet (2"/3") See section 6.
4. Igniter
5. Flame Sensor
6. Sight Glass Permits observation of burner flame.
7. Flue Air Mixture Pressure Test Port - Not available
on all models.
8. User Interface Displays information regarding boiler
condition. Allows adjustment of boiler operating
parameters. NOTE: Does not replace thermostat used
to control central heating space.
9. Boiler Control Module
10. Heat Exchanger
11. ASME Plate
12. Low Voltage Terminal Strip Connection of all low
voltage wiring, including thermostat.
13. Return Water Temperature Sensor
14. Return Water From Heating System (In) and
Drain Valve Connection supplied at bottom of boiler.
See section 5.
15. Condensate Drain Boiler produces a liquid
(condensate) as a by-product of combustion. (See page
14)
16. Condensate Trap (Field Installed) Condensate must
be piped to appropriate drain. See section 6.
17. Jacket Panel Latch
18. Supply Water Outlet to Heating System (Out)
Connections supplied for connecting from bottom of
boiler. See section 5.
19. Temperature Pressure Gauge (Field Installed)
20. High Voltage Junction Box For connection of 120V
components. See section 8.
21. Flue Collector
22. Vent Temperature Sensor
23. Combustion Analysis Test Port
24. Gas (Control) Valve Delivers proper quantity of fuel
to Combustion Air Blower. See section 7.
25. Combustion Air Blower Delivers proper quantity of
combustion air, receives fuel from gas valve, mixes air
and fuel sending mixture to burner for combustion.
26. Heat Exchanger Surface Temperature Switch
27. Supply Water Temperature Sensor and High Limit
Switch
28. Safety Relief Valve Factory supplied, Field installed.
See section 5.
29. Pump Relay
30. Burner not shown (see page 39)
31. Wall Hanging Support Bracket not shown (see page
12) Integral to boiler. Allows wall mounting when used
with supplied wall mounting bracket. See section 4.
32. Gas Connection (See section 7)
3 - COMPONENT LISTING