Voglio sapere a riguardo di…

68394

Federal Register / Vol. 86, No. 229 / Thursday, December 2, 2021 / Rules and Regulations
h. In section 4.2.5.3, by removing 3.1.9 and adding in its place 3.1.10
and in the Case 2 paragraph, by removing For outdoor bin temperatures hk=1Tj where Tok=1Tj TCC, determine Q
and Ehk=1Tj using and adding in its place For outdoor bin temperatures where Tok=1Tj < TCC, determine hk=1Tj and Ehk=1Tj using;
Q i. In paragraph c. of section 4.2.6, by hk=25 and adding in its removing Q
k=3

place Qh 5;
j. In section 4.2.6.2, in the heading, by removing BLTj and k. By revising the heading for section 4.2.6.3.
The revisions read as follows:

Appendix M to Subpart B of Part 430
Uniform Test Method for Measuring the Energy Consumption of Central Air Conditioners and Heat Pumps

3.
3.6
3.6.4
a. For a cooling/heating heat pump, the compressor shall operate for the H1N test at a speed, measured by RPM or power input frequency Hz, no lower than the speed used in the A2 test if the tested H1N heating capacity is less than the tested A2 cooling capacity.

4.
4.1.3
4.1.3.2 Unit Alternates Between High k=2 and Low k=1 Compressor Capacity to Satisfy the Building Cooling Load at ck=1Tj ck=2Tj Temperature Tj, Q

4.1.4.2 Unit Operates at an Intermediate Compressor Speed k=i In Order To Match the Building Cooling Load at Temperature ck=1Tj < BLTj < Q
ck=2Tj Q

4.2
4.2.6
4.2.6.3 Heat Pump Only Operates at Booster k=3 Compressor Capacity at Temperature Tj, and its Capacity Is Greater Than or Equal to the Building Heating Load, BLTj Qhk=3Tj.

5. Appendix M1 to subpart B of part 430 is amended:
a. In section 1.2, by revising the definition of Minimum-speed-limiting variable-speed heat pump;
b. In section 3.1.4.7, by removing 3.14.6 and adding in its place 3.1.4.6;
c. By revising paragraph a. of section 3.6.4;
d. In paragraph d., section 3.6.4, by revising Table 14;
e. In section 4.1.3.2, in the heading, by removing Tj, Qck=1Tj < BLTj <
Qck=2Tj, and adding in its place Tj, ck=1Tj < BLTj < Q
ck=2Tj;
Q f. In section 4.1.4.2, by removing EER2k=2Tj and adding in its place EERk=2Tj;
g. In section 4.2.5.1, in the Case 1
paragraph by removing 3.1.9 and adding in its place 3.1.10 and removing EhpTj = EhpTj and adding in its place EhTj = EhpTj, and in the Case 2 paragraph by removing ToTj >TCC, and adding in its place ToTj h. In section 4.2.5.2, in the Case 1
paragraph, by removing 3.1.9 and adding in its place 3.1.10;
i. In section 4.2.5.3, in the Case 1
paragraph, by removing 3.1.9 and adding in its place 3.1.10 and in the Case 2 paragraph by removing For outdoor bin temperatures where hk=1Tj and Tok=1Tj TCC, determine Q
Ehk=1Tj using and adding in its place and For outdoor bin temperatures where Tok=1Tj < TCC, determine hk=1Tj and Ehk=1Tj using;
Q j. In paragraph c. of section 4.2.6, by hk=25 and adding in its removing Q
hk=35;
place Q
k. In section 4.2.6.2, in the heading, by hk=2Tj and removing BLTj < Q
hk=2Tj;
adding in its place BLTj Q
and l. In section 4.2.6.3, in the heading, by removing Heat Pump Only Operates at High k=3 and adding in its place Heat Pump Only Operates at Booster k=3.
The revisions read as follows:

Appendix M1 to Subpart B of Part 430Uniform Test Method for Measuring the Energy Consumption of Central Air Conditioners and Heat Pumps

1.
1.2
Minimum-speed-limiting variable-speed heat pump means a heat pump for which the compressor minimum speed represented by revolutions per minute or motor power input frequency is higher than its minimum value for operation in a 47 F ambient temperature for any bin temperature Tj for which the calculated heating load is less than the calculated intermediate-speed capacity.

3.
3.6
3.6.4 Tests for a Heat Pump Having a Variable-Speed Compressor a. Conduct one maximum temperature test H01, two high temperature tests H1N and H11, one frost accumulation test H2V, and one low temperature test H32. Conducting one or more of the following tests is optional:
An additional high temperature test H12, an additional frost accumulation test H22, and a very low temperature test H42. Conduct the optional high temperature cyclic H1C1
test to determine the heating mode cyclicdegradation coefficient, CDh. If this optional test is conducted but yields a tested CDh that exceeds the default CDh or if the optional test is not conducted, assign CDh the default value of 0.25. Test conditions for the nine tests are specified in Table 14. The compressor shall operate at the same heating full speed, measured by RPM or power input frequency Hz, as the maximum speed at which the system controls would operate the compressor in normal operation in 17 F
ambient temperature, for the H12, H22 and H32 Tests. The compressor shall operate for the H1N test at the maximum speed at which the system controls would operate the compressor in normal operation in 47 F
ambient temperature. Additionally, for a cooling/heating heat pump, the compressor shall operate for the H1N test at a speed, measured by RPM or power input frequency Hz, no lower than the speed used in the A2
test if the tested H1N heating capacity is less than the tested A2 cooling capacity.

d.

TABLE 14HEATING MODE TEST CONDITIONS FOR UNITS HAVING A VARIABLE-SPEED COMPRESSOR
Air entering indoor unit temperature F

Test description
lotter on DSK11XQN23PROD with RULES1

Dry bulb H01 test required, steady.
H12 test optional, steady.
H11 test required, steady.

VerDate Sep<11>2014

16:00 Dec 01, 2021

Air entering outdoor unit temperature F

Wet bulb
Dry bulb
Compressor speed
Heating air volume rate
Wet bulb
70

60max

62

56.5

Heating Minimum

Heating Minimum.1

70

60max

47

43

Heating Full 4

Heating Full-Load.3

70

60max

47

43

Heating Minimum

Heating Minimum.1

Jkt 256001

PO 00000

Frm 00006

Fmt 4700

Sfmt 4700

E:FRFM02DER1.SGM

02DER1