Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p102
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 102/150)
Character Range: 1009176–1011852

°C);
(b) At all altitudes below 1,600 m;
(c) At engine coolant temperatures above 343 K (70 °C).
This paragraph shall not apply in the case of monitoring for reagent level in the storage tank, where monitoring shall be conducted under all conditions where measurement is technically feasible including all conditions when a liquid reagent is not frozen.
2.4. Reagent freeze protection
2.4.1. The manufacturer may use a heated or a non-heated reagent tank and dosing system, in accordance with the general requirements of paragraph 2.3.1. A heated system shall meet the requirements of paragraph 2.4.2. A non heated system shall meet the requirements of paragraph 2.4.3.
2.4.1.1. The use of a non-heated reagent tank and dosing system shall be indicated in written instructions to the owner of the vehicle.
2.4.2. Heated reagent tank and dosing system
2.4.2.1. If the reagent has frozen, the manufacturer shall ensure that reagent is available for use within a maximum of 70 minutes after the start of the vehicle at 266 K (- 7 °C) ambient temperature.
2.4.2.2. Demonstration
2.4.2.2.1. The reagent tank and dosing system shall be soaked at 255 K (-18 °C) for 72 hours or until the bulk of the reagent becomes solid.
2.4.2.2.2. After the soak period provided in paragraph 2.4.2.2.1. the engine shall be started and operated at 266 K (- 7 °C) ambient temperature as follows: 10 to 20 minutes idling, followed by up to 50 minutes at no more than 40 per cent load.
2.4.2.2.3. The reagent dosing system shall be fully functional at the end of the test procedures described in paragraphs 2.4.2.2.1. and 2.4.2.2.2.
2.4.2.2.4. Demonstration of compliance with the requirements of paragraph 2.4.2.2. may be done in a cold chamber test cell equipped with an engine or vehicle dynamometer or may be based on vehicle field tests, as approved by the Type Approval Authority.
2.4.3. Non-heated reagent tank and dosing system
2.4.3.1. The driver warning system described in paragraph 4. shall be activated if no reagent dosing occurs at an ambient temperature ≤ 266 K (-7 °C).
2.4.3.2. The severe inducement system described in paragraph 5.4. shall be activated if no reagent dosing occurs at an ambient temperature ≤ 266 K (-7 °C) within a maximum of 70 minutes after vehicle start.
2.5. Each separate reagent tank installed on a vehicle shall include a means for taking a sample of any fluid inside the tank and for doing so without the need for information not stored on-board the vehicle. The sampling point shall be easily accessible without the use of any specialised tool or device. Keys or systems which are normally carried on the vehicle for locking access to the tank shall not be