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9.3.b Flow Hood Method: (Requires use of calibrated flow capture hood)
9.4 Unconditioned Spaces Containing Ductwork
9.5 Testing for Pressure Imbalances Caused By Forced Air System Flows
9.5.a Dominant Duct Leak Test:
9.5.b Master Suite Door Closure:
9.5.c All Interior Doors Closed:
9.5.d Room to Room Pressures:
9.6 Other Important Test Procedures
9.6 a Total System Air Flow:
9.6.b System Charge:
9.6.c Airflow Balancing:
CHAPTER 10
COMBUSTION SAFETY TEST PROCEDURE
10.1 Overview
10.2 Test Procedures
10.2.a Measure Ambient CO Level in Building:
10.2.b Survey of Combustion Appliances:
10.2.c Survey of Exhaust Fans:
10.2.d Measure Worst Case Fan Depressurization:
10.2.e Spillage Test (natural draft and induced draft appliances):
10.2.f Carbon Monoxide Test:
10.2.g Draft Test (natural draft appliances):
10.2.h Heat Exchanger Integrity Test (Forced Air Only):
APPENDIX A
CALIBRATION AND MAINTENANCE
A.1 Fan Calibration Parameters (Updated January 2007)
Model 3 (110V) Calibration Parameters:
Model 3 (230V) Calibration Parameters:
Model 4 (230V) Calibration Parameters:
A.2 Issues Affecting Fan Calibration
A.2.a Fan Sensor and Motor Position:
A.2.b Upstream Air Flow Conditions:
A.2.c Operating Under High Backpressure Conditions:
A.3 Blower Door Fan Maintenance and Safety
A.3.a Maintenance Checks:
A.3.b General Operational Notes and Tips:
A.3.c Replacing the Model 4 Controller's Internal Fuse:
A.4 Calibration and Maintenance of Digital Pressure Gauges
A.4.a Digital Gauge Calibration:
A.4.b Digital Gauge Maintenance:
A.5 Checking for Leaky Tubing
APPENDIX B
FLOW CONVERSION TABLES
Model 3 (110V)
Model 3 (230V)
Model 4 (230V)
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49
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