31
9.4 Boiler Start-up and Operational Test
1. Verify air is purged from hydronic piping
2. System test pumps - verify each pump is opera-
tional
3. Verify gas piping
•
Confi rm pressure test. See section 7.3.
•
Visually inspect piping to determine there are no
open fi ttings 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 fl ows adequately and is disposed
properly.
8. Check control module operation.
9. Check fi eld-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.
•
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 fl ow from
Meter = 2 cu ft
Measured time = 72 seconds
Rate (MBH) =
3600 x 2 cu ft
= 100 MBH
72 seconds
*Metric - See Glossary
** Most propane systems do not have gas fl ow meters.
2. Compare measured input to table. Adjust input rate
9 - START UP PROCEDURE
if needed using fi gure 9-3 below.
Size Minimum Maximum
050 45 51
075 65 76
100 90 102
150 140 153
200 185 204
Natural Gas and Propane
3. Measure CO
2
and compare to table. Adjust CO
2
if
needed using fi gure 9-3 below. See fi gure 9-4 for
combustion air analyzer port.
Gas
CO
2
CO
Min.
Max.
Natural Gas 8.5 9.5 <100ppm
Propane 10.0 11.0 <150ppm
Natural Gas only**
4.
Measure input. Compare to table above. Continue
to measure input and CO
2
until both measured
values are within range specifi ed in tables.
Propane Gas
Most propane systems do not have fl ow meters.
1. Check CO
2
. Propane should be between 10% and
11.0%.
•
If CO
2
is low increase gas fl ow following fi gure
9-3.
•
If CO
2
is high decrease gas fl ow following fi gure
9-3.
•
To increase gas fl ow turn 'throttle' left or counter
clockwise .
•
To decrease gas fl ow turn 'throttle' right or
clockwise .
•
Limit adjustment to one turn and retest.
9-3 Gas Valve
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