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designated a steady-state test. Steady-state tests shall be terminated after 35 min of data collection. 4.4.4.6 Test procedure: When a defrost cycle does not end the preconditioning period 4.4.4.6.1 If the heat pump initiates a defrost cycle during the equilibrium period or during the first 35 min of the data collection period, the heating capacity test shall be restarted as specified 4.4.4.6.3 4.4.4.6.2 If the quantity %DT exceeds 2,5 % any time during the first 35 min of the data collection period, then the heating capacity test procedure shall be restarted as specified in 4.4.4.6.3. Prior to the restart, defrost cycle shall occur. This defrost cycle may be manually initiated or delayed until the heat pump initiates an automatic defrost. 4.4.4.6.3 If either 4.4.4.6.1 or 4.4.4.6.2 apply, then the restart shall begin 10 min after the defrost cycle terminates with a new equilibrium period of one hour. This second attempt shall follow the requirements of 洁净网 4.4.4.3 and 4.4.4.4 and the test procedure of 4.4.4.5. 4.4.4.6.4 If the conditions specified in 4.4.4.6.1 or 4.4.4.6.2 do not occur and the test tolerances specified in Table 4 are satisfied during both the equilibrium period and the first 35 min of the data collection period, then the heat capacity test shall be designated a steady-state test. Steady-state tests shall be terminated after 35 min of data collection. 4.4.4.7 Test procedure for transient tests When, in accordance with 4.4.4.5, a heating capacity test is designated a transient test, the following adjustments shall apply. To constitute a valid transient heating capacity tests, the test tolerances specified in Table 5 shall be achieved during both the equilibrium period and the data collection period. As noted in Table 5, the test tolerances are specified for two sub-intervals. Interval H consists of data collected during each heating interval, with the exception of the first 10 min after defrost termination. Interval D consists of data collected during each defrost cycle plus the first 10 min of the subsequent heating interval. The test tolerance parameters in Table 5 shall be determined throughout the equilibrium and data collection periods. All data collected during each interval, H or D, shall be used to evaluate compliance with the Table 5 EN 14511-3:2004 (E) 17 test tolerances. Data from two or more H intervals or two or more D intervals shall not be combined and then used in evaluating Table 5 compliance. Compliance is based on evaluating data from each interval separately. The data collection period shall be extended until 3 h have elapsed or until the heat pump completes three complete cycles during the period, whichever occurs first. If at an elapsed time of 3 h, the heat pump is conducting a defrost cycle, the cycle shall be completed before terminating the collection of data. A complete cycle consists of a heating period and a defrost period, from defrost termination to defrost termination. (责任编辑：admin) |
