Dunkirk Helix VX Vertical Laser Tube Wall Hung Stainless Steel Modulating Condensing Boiler User Manual
Page 38
38
9.4 Boiler Start-up and Operational Test
1.
Verify air is purged from hydronic piping
2.
System test pumps - verify each pump is
operational
3.
Verify gas piping
• Confirm pressure test. See section 7.3 page 33.
• Visually inspect piping to determine there are no
open fittings or ends, and all valves at unused
outlets are closed and plugged/capped.
• Purge air from piping
• Check piping and connections for leaks
immediately after gas is turned on. Shut off
gas supply and make necessary repairs if leaks
found.
4.
Follow OPERATING INSTRUCTIONS to initiate boiler
operation. See section 10.
5.
Inspect combustion air and vent piping. Verify pipe
is not leaking and terminations are unobstructed
and vent gas discharge is not a nuisance or hazard.
6.
Verify boiler functions.
7.
Inspect condensate disposal system. Verify
condensate flows adequately and is disposed
properly.
8.
Check control module operation.
9.
Check field sourced limits, low water cutoffs, etc.
per manufacturer's instructions.
9.5 Check Combustion
Natural Gas
1.
Measure input. English units*
• Turn off gas to all other appliances.
• Activate some heating zones to dissipate heat.
• Operate boiler for 10 minutes, prior to sampling
with analyzer.
• Set boiler on high fire. See Appendix A, Installer
Menu, system test page 75.
• Use ½, 1 or 2 cu ft dial on gas meter. Measure
time required for one or more complete
revolutions. Measure time for 1-2 minutes.
• Calculate input.
Input (MBH)
=
3600 x cu ft
seconds
Example: Gas flow from
Meter = 2 cu ft
Measured time = 72 seconds
Rate (MBH)
=
3600 x 2 cu ft
=
100 MBH
72 seconds
*Metric - See Glossary
2.
Compare measured input table. Adjust input rate if
needed using Table 11 below.
Table 11 - Rate @ High Fire
Rate @ High Fire
Size
From
To
050
45
51
075
65
76
100
90
102
150
140
153
200
185
204
9 - START UP PROCEDURE