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Carbon Monoxide Investigation

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Title: Carbon Monoxide Investigation


1
Carbon Monoxide Investigation
2
Why It Matters.
3
Preventing Tragedies
www.images.google.com
4
Where Does CO Come From?
5
What causes CO?
Heavy Traffic 50 ppm CO
7000 ppm CO (undiluted)
6
What causes CO?
Smog
www.commons.wikipedia.org
7
What causes CO?
Warm Air Layer
Temperature Inversion (Mexico City) 100-200
ppm CO in the air
Trapped Emissions
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8
What Causes CO Inside?
9
What Causes CO Inside?
5000 ppm CO
30,000 ppm CO (undiluted smoke)
www.commons.wikipedia.org
www.images.google.com
10
Complete Combustion
90 parts air
10 parts gas
11
Incomplete Combustion
CO
70 parts air
10 parts gas
www.commons.wikipedia.org
12
Revise Snagit
Incomplete Combustion
Too much air
Not enough air
www.commons.wikipedia.org
13
Overgassing
Excess fuel
Too much fuel
www.commons.wikipedia.org
14
Quenching the Flame
Soot
CO
Incomplete Combustion
Proper temperature
Too cool
www.commons.wikipedia.org
15
CO Poisoning
16
What is CO Poisoning?
Normal red blood cell
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17
Symptoms of CO Poisoning
  • Mild Exposure
  • Headache, nausea, vomiting, fatigue
  • Medium Exposure
  • Throbbing headache, drowsiness, confusion, fast
    heart rate
  • Extreme Exposure
  • Unconsciousness, convulsions, cardio-respiratory
    failure, death

18
Effects of CO Exposure
19
Pause for Discussion
20
CO Detectors
21
CO Detectors
22
Detector Specifications
23
Placement of Detectors
CO Detector
24
MIS-placement of Detectors
CO Detector
Attic
Bathroom
Garage
Kitchen
CO Detector
Basement
25
False Alarms
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26
False Alarms
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27
False Alarms
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28
False Alarms
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29
Understanding the CGI
30
Sensit Gold CGI
31
Ambient and Air-free CO
32
Ambient vs. Air-free
33
Pause for Discussion
34
Doing a CO InvestigationStep-by-Step
35
Step 1 Prepare your CGI.
36
Zero the CGI.
37
Test the sensor.
38
Step 2 Survey the location.
Discolored
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39
Step 3 Take an ambient CO reading outside.
40
Ambient Outside CO
41
Step 4 Check around the door.
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42
Step 5 Interview the customer.
Still need better picture.
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43
Step 6 Enter the home.
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44
Do not make changes.
Still need picture of appliance with cover off.
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45
Compare inside outside CO readings.
Inside Ambient CO
Outside Ambient CO
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46
Compare inside outside CO readings.
Inside Ambient CO
Outside Ambient CO
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47
Look for evidence of incomplete combustion.
48
Backdraft
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49
Step 7 Perform a CO test on all connected
appliances.
50
Clock the appliance.
5-minute Appliance Warm-up
51
Take an ambient reading in the flue.
52
Service the appliance.
53
Check for CO again.
54
Step 8 Communicate with the customer.
55
Pause for Discussion
56
Checking Appliances
57
Improper Venting
Heat
Cool Air Return
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58
Blocked Flues
02-02p2photo of blocked flue
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59
CO Thresholds
60
CO Thresholds
Exceeds ambient threshold for burner. Take
action.
Exceeds air-free threshold for water heater.
Take action.
61
Placing the Probe Correctly
Wall Heater (BIV)
62
Placing the Probe Correctly
Condensing Furnace
63
Placing the Probe Correctly
Condensing Furnace
64
Placing the Probe Correctly
Induced Draft Appliance
65
Direct Vent Wall Heater
Threshold 400 ppm
66
Water Heater
Threshold 200 ppm air-free
67
Forced Air Furnace
Threshold 400 ppm air-free
68
Range Top
Threshold 25 ppm ambient
69
Oven
Threshold 225 ppm ambient
70
Threshold 25 ppm ambient
71
Threshold 400 ppm air-free in the firebox
72
Pause for Discussion
73
Taking Action
74
Acting on CO Calls
75
Measured Level of Indoor Ambient CO
Responding to CO
Less than 35 ppm
Between 35 200 ppm
More than 200 ppm
Action
Advise evacuation
No
Yes
Yes
Require evacuation
No
No
Yes
Ventilate
No
Yes
Yes
Identify CO source
Yes
Yes
Yes
Repair appliance, if possible
Yes
Yes
Yes
Refer customer to indoor air specialist, if no
CO source is found.
Yes
No
No
Disconnect appliance, if you cant eliminate
hazard.
No
Yes
Yes
76
If the reading is gt35 ppm CO, you must act.
Advise Evacuation
77
If you cant fix the appliance
Capped Line
Hazard Notice
78
gt 200 ppm CO
Require Evacuation
www.images.google.com
79
gt 200 ppm CO
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80
Thank you
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81
Pause for Discussion
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