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Federal Register / Vol. 86, No. 232 / Tuesday, December 7, 2021 / Proposed Rules blades preinstalled, install fan blades only on the fan head that will be directly centered over the intersection of the sensor axes. Even if the fan heads in a multi-head ceiling fan would typically oscillate when the blades are installed on all fan heads, the ceiling fan is subject to this test procedure if the centered fan head does not oscillate when it is the only fan head with the blades installed. If the fan blades are preinstalled on all fan heads, measure air velocity in accordance with section 3.3 of this appendix except turn on only the centered fan head. Take the power consumption measurements separately, with the fan blades installed on all fan heads and with any oscillating function, if present, switched on.

3.3.1 Test conditions to be followed when testing:

3 If present, any additional accessories or features sold with the ceiling fan that do not relate to the ceiling fans ability to create airflow by rotation of the fan blades for example light kit, heater, air ionization, ultraviolet technology is to be installed but turned off during testing. If the accessory/
feature cannot be turned off, it shall be set to the lowest energy-consuming mode during testing.
4 If present, turn off any oscillating function causing the axis of rotation of the fan heads to change relative to the ceiling during operation prior to taking air velocity measurements. Turn on any oscillating function prior to taking power measurements.

8 Measure power input at a point that includes all power-consuming components of the ceiling fan but without any attached light kit energized; or without any additional accessory or feature energized, if possible;
and if not, with the additional accessory or feature set at the lowest energy-consuming mode.

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3.3.2 Air Velocity and Power Consumption Testing Procedure:
Measure the air velocity FPM and power consumption W for HSSD ceiling fans until stable measurements are achieved, measuring at high speed only. Measure the air velocity and power consumption for LSSD and VSD
ceiling fans that also meet the definition of an LSSD fan until stable measurements are achieved, measuring first at low speed and then at high speed. To determine low speed, start measurements at the lowest available speed and move to the next highest speed until the low speed definition in section 1.12
of this appendix is met. Air velocity and power consumption measurements are considered stable for high speed if:
1 The average air velocity for each sensor varies by less than 5% or 2 FPM, whichever is greater, compared to the average air velocity measured for that same sensor in a successive set of air velocity measurements, and 2 Average power consumption varies by less than 1% in a successive set of power consumption measurements.

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a Air velocity and power consumption measurements are considered stable for low speed if:
1 The average air velocity for each sensor varies by less than 10% or 2 FPM, whichever is greater, compared to the average air velocity measured for that same sensor in a successive set of air velocity measurements, and 2 Average power consumption varies by less than 1% in a successive set of power consumption measurements.
b These stability criteria are applied differently to ceiling fans with airflow not directly downward. See section 3.3.3 of this appendix.
Step 1: Set the first sensor arm if using four fixed arms, two sensor arm if using a two-arm rotating setup, or single sensor arm if using a single-arm rotating setup to the 0 degree Position Axis A. If necessary, use a marking as reference. If using a single-arm rotating setup or two-arm rotating setup, adjust the sensor arm alignment until it is at the 0 degree position by remotely controlling the antenna rotator.
Step 2: Set software up to read and record air velocity, expressed in feet per minute FPM in 1 second intervals. Temperature does not need to be recorded in 1 second intervals. Record current barometric pressure.
Step 3: Allow test fan to run 15 minutes at rated voltage and at high speed if the ceiling fan is an HSSD ceiling fan. If the ceiling fan is an LSSD or VSD ceiling fan that also meets the definition of an LSSD fan, allow the test fan to run 15 minutes at the rated voltage and at the lowest available ceiling fan speed. Turn off all forced-air environmental conditioning equipment entering the chamber e.g., air conditioning, close all doors and vents, and wait an additional 3 minutes prior to starting test session.
Step 4a: For a rotating sensor arm: Begin recording readings. Starting with Axis A, take 100 air velocity readings 100 seconds runtime and record these data. For all fans except multi-head fans and fans capable of oscillating, also measure power during the interval that air velocity measurements are taken. Record the average value of the air velocity readings for each sensor in feet per minute FPM. Determine if the readings meet the low speed definition as defined in section 1.12 of this appendix. If not, restart Step 4a at the next highest speed until the low-speed definition is met. Once the low speed definition is met, rotate the arm, stabilize the arm, and allow 30 seconds to allow the arm to stop oscillating. Repeat data recording and rotation process for Axes B, C, and D. Step 4a is complete when the readings for all axes meet the low speed definition at the same speed. Save the data for all axes only for those measurements that meet the low speed definition. Using the measurements applicable to low speed, record the average value of the power measurement in watts W 400 readings.
Record the average value of the air velocity readings for each sensor in feet per minute FPM 400 readings.
Step 4b: For a two-arm rotating setup:
Begin recording readings. Starting with Axes
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A and C, take 100 air velocity readings 100
seconds run-time for both axes and record these data. For all fans except multi-head fans and fans capable of oscillating, also measure power during the interval that air velocity measurements are taken. Record the average value of the air velocity readings for each sensor in feet per minute FPM.
Determine if the readings meet the low speed definition as defined in section 1.12 of this appendix. If not, restart Step 4b at the next highest speed until the low speed definition is met. Once the low speed definition is met, rotate the two-arm, stabilize the arm, and allow 30 seconds to allow the arm to stop oscillating. Repeat data recording for Axes B
and D. Step 4b is complete when the readings for all axes meet the low speed definition at the same speed. Save the data for all axes only for those measurements that meet the low speed definition. Using the measurements applicable to low speed, record the average value of the power measurement in watts W 200 readings.
Record the average value of the air velocity readings for each sensor in feet per minute FPM 200 readings.
Step 4c: For four fixed sensor arms: Begin recording readings. Take 100 air velocity readings 100 seconds run-time and record this data. Take the readings for all sensor arms Axes A, B, C, and D simultaneously.
For all fans except multi-head fans and fans capable of oscillating, also measure power during the interval that air velocity measurements are taken. Record the average value of the air velocity readings for each sensor in feet per minute FPM. Determine if the readings meet the low speed definition as defined in section 1.12 of this appendix.
If not, restart Step 4c at the next highest speed until the low speed definition is met.
Step 4c is complete when the readings for all axes meet the low speed definition at the same speed. Save the data for all axes only for those measurements that meet the low speed definition. Using the measurements applicable to low speed, record the average value of the power measurement in watts W
100 readings. Record the average value of the air velocity readings for each sensor in feet per minute FPM 100 readings.
Step 5: Repeat step 4a, 4b or 4c until stable measurements are achieved.
Step 6: Repeat steps 1 through 5 above on high speed for LSSD and VSD ceiling fans that also meet the definition of an LSSD fan.
Note: Ensure that temperature and humidity readings are maintained within the required tolerances for the duration of the test all tested speeds. Forced-air environmental conditioning equipment may be used and doors and vents may be opened between test sessions to maintain environmental conditions.
Step 7: If testing a multi-mount ceiling fan, repeat steps 1 through 6 with the ceiling fan in the ceiling fan configuration associated with either hugger or standard ceiling fans not already tested.
If a multi-head ceiling fan includes more than one category of ceiling fan head, then test at least one of each unique category. A
fan head with different construction that could affect air movement or power consumption, such as housing, blade pitch,
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