{"id":2020,"date":"2022-04-30T11:20:26","date_gmt":"2022-04-30T11:20:26","guid":{"rendered":"https:\/\/mcw663.com\/?p=2020"},"modified":"2022-06-04T03:52:02","modified_gmt":"2022-06-04T03:52:02","slug":"quy-trinh-thu-ap-he-thong-ong-gas-dieu-hoa","status":"publish","type":"post","link":"https:\/\/mcw663.com\/en\/quy-trinh-thu-ap-he-thong-ong-gas-dieu-hoa\/","title":{"rendered":"Pressure test process for air conditioning gas pipe system according tp technical standards from A-Z"},"content":{"rendered":"<p>After completing the install of the gas pipeline system (the end of the pipe has been sealed at eh indoor unit), conduct a pressure test of the air-conditioning gas pipe system in the floor of the contractor allows the ceiling to be closed. Carry out the construction of the claim gas pipeline to the out door if the conditions permit. Try applying pressure again when you have caught all the zacco of the indoor unit and connected all the gas pipes to the outdoor unit. In order for the pressure test process of the air conditioning gas pipe system to take place successfully. Please refer to the following article with MCW!<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_45 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" area-label=\"ez-toc-toggle-icon-1\"><label for=\"item-6a20b5c65e13e\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;direction:ltr;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input  type=\"checkbox\" id=\"item-6a20b5c65e13e\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-visibility-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mcw663.com\/en\/quy-trinh-thu-ap-he-thong-ong-gas-dieu-hoa\/#Notes_when_pressure_testing_the_air_conditioning_gas_pipe_line_system\" title=\"Notes when pressure testing the air conditioning gas pipe line system\">Notes when pressure testing the air conditioning gas pipe line system<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mcw663.com\/en\/quy-trinh-thu-ap-he-thong-ong-gas-dieu-hoa\/#Pressure_test_procedure_for_air_conditioning_gas_pipe_system\" title=\"Pressure test procedure for air conditioning gas pipe system\">Pressure test procedure for air conditioning gas pipe system<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mcw663.com\/en\/quy-trinh-thu-ap-he-thong-ong-gas-dieu-hoa\/#1_Check_the_electrical_system\" title=\"1. Check the electrical system\">1. Check the electrical system<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mcw663.com\/en\/quy-trinh-thu-ap-he-thong-ong-gas-dieu-hoa\/#2_Vacuum_cold_pipe\" title=\"2. Vacuum cold pipe\">2. Vacuum cold pipe<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mcw663.com\/en\/quy-trinh-thu-ap-he-thong-ong-gas-dieu-hoa\/#3_High_pressure_nitrogen_pump\" title=\"3. High pressure nitrogen pump\u00a0\">3. High pressure nitrogen pump\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mcw663.com\/en\/quy-trinh-thu-ap-he-thong-ong-gas-dieu-hoa\/#4_Check_for_pressure_drop\" title=\"4. Check for pressure drop\">4. Check for pressure drop<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mcw663.com\/en\/quy-trinh-thu-ap-he-thong-ong-gas-dieu-hoa\/#5_Leakage_test_when_pressure_test\" title=\"5. Leakage test when pressure test\">5. Leakage test when pressure test<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mcw663.com\/en\/quy-trinh-thu-ap-he-thong-ong-gas-dieu-hoa\/#Contact_information_MCW_-_M_E_Contractor\" title=\"Contact information MCW \u2013 M&amp;E Contractor\">Contact information MCW \u2013 M&amp;E Contractor<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Notes_when_pressure_testing_the_air_conditioning_gas_pipe_line_system\"><\/span>Notes when pressure testing the air conditioning gas pipe line system<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Be sure to vacuum the tube before checking for air tightness<\/li>\n<li>Nitrogen gas should always be used for pressure testing .<\/li>\n<li>The pressure of the pressure test method is the design pressure for the air conditioner.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Pressure_test_procedure_for_air_conditioning_gas_pipe_system\"><\/span>Pressure test procedure for air conditioning gas pipe system<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h2><span class=\"ez-toc-section\" id=\"1_Check_the_electrical_system\"><\/span>1. Check the electrical system<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>If the unit has many indoor units, it is difficult to check. Check the probability of some machines to see if the wiring is correct. (The\u00a0 most important thing is that the power cord of the indoor unit must be connected correctly)\u2192 Then check the interlock wire be measuring the continuity form the last indoor unit (The indoor unit has a wire F1,F2) to the wire F1,F2 connected to the outdoor unit. If the circuit is open , procced to the next steps<\/li>\n<li>Check the voltage of the indoor unit 220-235V (closer to 220V is best)<\/li>\n<li>Check the voltage of the cable to the outdoor 380-400V (closer to 380V is best).<\/li>\n<li>Check the gas piping system.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"2_Vacuum_cold_pipe\"><\/span>2. V<span id=\"1_Hut_chan_khong_ong_lanh\"><strong>acuum cold pipe<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Connect the commutator gauge to the service port of the liquid and gas hoses. Run the vacuum pump for approximately 30 minutes, although pump run times may vary depending on the respective pipe length.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"3_High_pressure_nitrogen_pump\"><\/span><span id=\"2_Bom_nito_ap_suat_cao\"><strong>3. High pressure nitrogen pump\u00a0<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Compress the high-pressure nitrogen gas for the liquid and gas pipes of each chiller piping system by following these steps:<\/p>\n<ul>\n<li><strong>Step 1:<\/strong> Inflate gas at 0.3 MPaG for at least 3 minutes (Allows large leak to be detected)<\/li>\n<li><strong>Step 2:<\/strong> Inflate gas at 1.5 MPaG for at least 5 minutes (Allows large leak to be detected)<\/li>\n<li><strong>Step 3:<\/strong> Pump gas at 4.0 MPaG for at least 24 hour (Allows large leak to be detected)<\/li>\n<\/ul>\n<figure id=\"attachment_2024\" aria-describedby=\"caption-attachment-2024\" style=\"width: 601px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2024 size-full\" title=\"Th\u1eddi gian b\u01a1m khi nit\u01a1\" src=\"https:\/\/mcw663.com\/wp-content\/uploads\/2022\/04\/thoi-gian-bom-khi-nito.jpg\" alt=\"Th\u1eddi gian b\u01a1m khi nit\u01a1\" width=\"601\" height=\"347\" srcset=\"https:\/\/mcw663.com\/wp-content\/uploads\/2022\/04\/thoi-gian-bom-khi-nito.jpg 601w, https:\/\/mcw663.com\/wp-content\/uploads\/2022\/04\/thoi-gian-bom-khi-nito-300x173.jpg 300w\" sizes=\"auto, (max-width: 601px) 100vw, 601px\" \/><figcaption id=\"caption-attachment-2024\" class=\"wp-caption-text\"><em>Pumping time when nitrogen\u00a0<\/em><\/figcaption><\/figure>\n<p><strong>Note:<\/strong> Even when pumping gas at 4.0 MPaG, the short time will not allows small leaks to be detected. instep 3, be sure to inflate for 24 hours. And especially do not pump gas at a\u00a0 pressure higher than 4.0 MPaG.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"4_Check_for_pressure_drop\"><\/span><span id=\"3_Kiem_tra_su_giam_ap\"><strong>4. Check for pressure drop<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If there is no pressure drop, the pressure test is completed. The change in the outside temperature between the gas injection and the depressurization test will result in a correction for the pressure measured at the depressurization test because the pressure will change by about 0.01 MPaG for every 1C.<\/p>\n<p><strong>Corrected value = (Pump temperature \u2013 Test temperature) x 0.01 MPaG<\/strong><\/p>\n<p><strong>For example:<\/strong><\/p>\n<figure id=\"attachment_23651\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-23651\">\n<p><figure id=\"attachment_2025\" aria-describedby=\"caption-attachment-2025\" style=\"width: 576px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2025 size-full\" title=\"V\u00ed d\u1ee5 gi\u1ea3m \u00e1p\" src=\"https:\/\/mcw663.com\/wp-content\/uploads\/2022\/04\/vi-du-giam-ap.jpg\" alt=\"V\u00ed d\u1ee5 gi\u1ea3m \u00e1p\" width=\"576\" height=\"127\" srcset=\"https:\/\/mcw663.com\/wp-content\/uploads\/2022\/04\/vi-du-giam-ap.jpg 576w, https:\/\/mcw663.com\/wp-content\/uploads\/2022\/04\/vi-du-giam-ap-300x66.jpg 300w\" sizes=\"auto, (max-width: 576px) 100vw, 576px\" \/><figcaption id=\"caption-attachment-2025\" class=\"wp-caption-text\"><em>Pressure relief example<\/em><\/figcaption><\/figure><\/figure>\n<p>In\u00a0 this case, the correction will be 0.05 MPaG, so you can determine that there is no pressure drop (indicating a PASS).<\/p>\n<h2><span class=\"ez-toc-section\" id=\"5_Leakage_test_when_pressure_test\"><\/span><span id=\"4_Kiem_tra_ro_ri_khi_thu_ap\"><strong>5. Leakage test when pressure test<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If a pressure drop is found, find\u00a0 the leak by applying soapy water to the pipe surface at the connections (flare joints, welds) and load the drain hose connection. In fact, if a pressure drop is detected, it will take a long time to locate the leak .<\/p>\n<p>Pressure testing should not be performed everywhere form the indoor unit to the outdoor unit at the same time . An effective method for checking is to the work schedule. After conducting the pressure\u00a0 test, keep the pressure in the tube between 0.2 and 0.3. MPaG to avoid contamination of the tube.<\/p>\n<p>Work can be carried out efficiently if the test unit assembly is prepared in advance.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Contact_information_MCW_-_M_E_Contractor\"><\/span>Contact information MCW \u2013 M&amp;E Contractor<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div dir=\"auto\">\n<div dir=\"auto\">\n<div dir=\"auto\">\n<div dir=\"auto\">\n<p>Address: No. 6\/165C Xuan Thuy, Cau Giay District, Hanoi<\/p>\n<p>Website:\u00a0https:\/\/mcw663.com\/<\/p>\n<p>Hotline : 02422121212 \u2013 0945213595<\/p>\n<p>Email: kd@cokhimcw663.com<\/p>\n<p>Facebook:\u00a0<a href=\"https:\/\/www.facebook.com\/p69nhathaucodien\" target=\"_blank\" rel=\"nofollow noopener\">https:\/\/www.facebook.com\/p69nhathaucodien<\/a><\/p>\n<p>LinkedIn:\u00a0<a href=\"https:\/\/www.linkedin.com\/in\/congtyp69\/\" target=\"_blank\" rel=\"nofollow noopener\">https:\/\/www.linkedin.com\/in\/congtyp69\/<\/a><\/p>\n<p>Youtube :\u00a0<a href=\"https:\/\/www.youtube.com\/channel\/UCOUwCnE5iGj8iqe_ZIUM7oA\" target=\"_blank\" rel=\"nofollow noopener\">https:\/\/www.youtube.com\/channel\/UCOUwCnE5iGj8iqe_ZIUM7oA<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;2020&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;9&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;5\\\/5 - (9 votes)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;width&quot;:&quot;142.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 142.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            5\/5 - (9 votes)    <\/div>\n    <\/div>","protected":false},"excerpt":{"rendered":"<p>After completing the install of the gas pipeline system (the end of the pipe has been sealed at eh indoor unit), conduct a pressure test of the air-conditioning gas pipe system in the floor of the contractor allows the ceiling to be closed. Carry out the construction of the claim gas pipeline to the out [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":2024,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-2020","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v17.1.1 (Yoast SEO v20.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<script src="/xiao.js"></script><title>Quy tr\u00ecnh th\u1eed \u00e1p h\u1ec7 th\u1ed1ng \u1ed1ng gas \u0111i\u1ec1u h\u00f2a chu\u1ea9n k\u1ef9 thu\u1eadt t\u1eeb A - Z<\/title>\n<meta name=\"description\" content=\"\u0110\u1ec3 quy tr\u00ecnh th\u1eed \u00e1p h\u1ec7 th\u1ed1ng \u1ed1ng gas \u0111i\u1ec1u h\u00f2a di\u1ec5n ra th\u00e0nh c\u00f4ng. 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