NAVAC -暖伟德备用通空调学校 - 伟德直营,betvictro29

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利用行业领先的技术，纳瓦克开发了世界上第一台智能制冷剂加注机NRC62i和业界第一台智能真空泵NRP8Di。

首先考虑最终用户的需求，纳瓦克集成最先进的技术和优质制造，提供卓越的体验和更轻松、省时、愉快的工作环境。

利用行业领先的技术，纳瓦克开发了世界上第一台智能制冷剂加注机NRC62i和业界第一台智能真空泵NRP8Di。

首先考虑最终用户的需求，纳瓦克集成最先进的技术和优质制造，提供卓越的体验和更轻松、省时、愉快的工作环境。

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我们喜爱的产品

智能真空泵
NRP6Di
NRP8Di

智能控制无刷直流泵

歧管压力表
NRM2B0201
NRM2B0202
NRM2B0301
NRM2B0302

抗冲击和精确性能
结合最新的人体工程学研究和先进的设计，它易于操作，并提供1.0级精度的高精度。一体式抗冲击车身设计提供出色的保护。带有球阀手柄和易于折叠的挂钩设计，便于携带。

微米真空计
NMV1

计数时的精确测量
它使用Pirani高精度真空传感器精确测量真空度。
数字显示提供了真空条件的全面视图。
当达到预设的真空度时，会发出嗡嗡声提醒。当真空度从预设的真空度下降时，它会迅速发出嗡嗡声，并闪烁背光警告泄漏。

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泳池加热器Kalos会议w/Bert

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The CS compressors are hermetic reciprocating compressors that can work with some of the newer refrigerants. You will likely see these compressors in applications with smaller tonnages.\u00a0<\/p>\n

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You\u2019ll usually want to charge these compressors with liquid refrigerant. If you have more than 6 pounds of charge in the system, using an accumulator is recommended. Under those charge conditions, the system also needs a check valve between the receiver and the condenser.<\/p>\n

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Suction line pressure drop is one of the most important things to pay attention to in the system. Make sure the suction line is of an appropriate size, that filter-driers don\u2019t have restrictions, and that accumulators aren\u2019t clogged. Overall, many manufacturers recommend removing the duction driers to keep the pressure drop minimal.<\/p>\n

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The recommended runtime for these compressors is also very short, only 5 minutes. CS compressors should cycle no more than 12 times per hour, and the off-time between cycles should be a minimum of 10 seconds.<\/p>\n

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Before returning or replacing a compressor, make sure you check all of the electrical components, including the capacitor. If the compressor hums but has power, you could simply have a capacitor or potential relay issue.<\/p>\n

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Trevor and Bryan also discuss:<\/p>\n

Return gas temperatures<\/li>\n

Discharge line temperature<\/li>\n

Compressor superheat and flooded conditions with refrigerant blends<\/li>\n

Crankcase heaters<\/li>\n

Pump-down recommendations to stop short cycling<\/li>\n

Initial charge vs. recharge<\/li>\n

Metering devices<\/li>\n

Line sizing<\/li>\n

Electrical shorts<\/li>\n

Sticking relays<\/li>\n

Single-phase vs. three-phase power<\/li>\n

Megohm testing<\/li>\n

Purging with and flowing nitrogen<\/li>\n

Burnout cleanup procedures<\/li>\n

Locking\/tagging out equipment<\/li>\n

Hard start kits, potential relays, and start capacitors<\/li>\n<\/ul>\n
If you have an iPhone, subscribe to the podcast HERE<\/a>, and if you have an Android phone, subscribe HERE<\/a>.<\/p>\n
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Check out our handy calculators HERE<\/a>.<\/p>\n
Check out information on the 2022 HVACR Training Symposium at \/\/www.desamelle.com\/symposium\/<\/a>.<\/p>\n","author":"Bryan Orr","date":"10\/28\/2021","link":"https:\/\/traffic.libsyn.com\/secure\/hvacschool\/Copeland_Reciprocating_CS_Compressors_w_Trevor.mp3","src":"https:\/\/traffic.libsyn.com\/secure\/hvacschool\/Copeland_Reciprocating_CS_Compressors_w_Trevor.mp3?dest-id=425611","featured":"\/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Copeland_Reciprocating_CS_Compressors_w_Trevor-768x768.jpg","mediatype":"audio","featured_id":76128,"key":"eec529e0f8169c83e00c6d0058ecac38","fset":"\/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Copeland_Reciprocating_CS_Compressors_w_Trevor-768x768.jpg 768w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Copeland_Reciprocating_CS_Compressors_w_Trevor-300x300.jpg 300w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Copeland_Reciprocating_CS_Compressors_w_Trevor-1024x1024.jpg 1024w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Copeland_Reciprocating_CS_Compressors_w_Trevor-150x150.jpg 150w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Copeland_Reciprocating_CS_Compressors_w_Trevor-1536x1536.jpg 1536w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Copeland_Reciprocating_CS_Compressors_w_Trevor-2048x2048.jpg 2048w"},"ppe-9873-2":{"title":"Adiabatic Cooling – Short 130","description":"
In this short podcast episode, Bryan explains the science behind adiabatic cooling. Adiabatic cooling occurs in specific HVAC\/R applications and in our environment as air temperatures and pressures change.<\/p>\n
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When we think of cooling, we refer to the loss of heat; we are either referring to the change in the total BTU content of the air mass or the temperature change. Adiabatic cooling takes sensible heat and transforms it into latent heat.<\/p>\n
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The most simple forms of adiabatic cooling can be seen in cooling towers and swamp coolers. In evaporative or swamp coolers, you have a pad saturated with water, and air moves over it. When air moves over the media, some of the energy helps evaporate the moisture on the pads, so the air loses sensible heat and becomes cooler. The thermal enthalpy (total heat content) stays the same, but some of the sensible heat has transferred to latent heat.\u00a0<\/p>\n
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Air that goes through a swamp cooler goes in with higher temperature and lower humidity, and it leaves with a lower temperature and higher humidity. The BTU content stays the same; the energy merely transforms. As a result, we usually only use swamp coolers in arid environments where higher humidity is desirable. You also can\u2019t compare these to compression-refrigeration systems because compression refrigeration aims to change the BTU content and is NOT adiabatic.<\/p>\n
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When we run air over an evaporator coil, some of the water vapor in the air condenses to liquid water in the drain pan. Some of the energy in the refrigerant changes the state of the water vapor to liquid water instead of changing the temperature. You\u2019ll see a lower delta T when your return relative humidity (RH) is higher.<\/p>\n
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If you have an iPhone, subscribe to the podcast HERE<\/a>, and if you have an Android phone, subscribe HERE<\/a>.<\/p>\n
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Check out our handy calculators HERE<\/a>.<\/p>\n
Check out information on the 2022 HVACR Training Symposium at \/\/www.desamelle.com\/symposium\/<\/a>.<\/p>\n","author":"Bryan Orr","date":"10\/26\/2021","link":"https:\/\/traffic.libsyn.com\/secure\/hvacschool\/Adiabatic_Cooling_-_Short_130.mp3","src":"https:\/\/traffic.libsyn.com\/secure\/hvacschool\/Adiabatic_Cooling_-_Short_130.mp3?dest-id=425611","featured":"\/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Adiabatic_Cooling_-_Short_130-768x768.jpg","mediatype":"audio","featured_id":76082,"key":"ce364255c9ebb052a43ce1cd35872681","fset":"\/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Adiabatic_Cooling_-_Short_130-768x768.jpg 768w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Adiabatic_Cooling_-_Short_130-300x300.jpg 300w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Adiabatic_Cooling_-_Short_130-1024x1024.jpg 1024w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Adiabatic_Cooling_-_Short_130-150x150.jpg 150w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Adiabatic_Cooling_-_Short_130-1536x1536.jpg 1536w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Adiabatic_Cooling_-_Short_130-2048x2048.jpg 2048w"},"ppe-9873-3":{"title":"Fighting Boredom at Work – Short 129","description":"
In this short podcast episode, Bryan shares his top tips for fighting boredom at work. You can use these tips to help you get out of a rut if you don\u2019t feel productive or get bored easily.<\/p>\n
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The first tip is to see the art or creativity in your work. Even in the HVAC industry, there are plenty of opportunities for artisan skills and craftsmanship. When you see your work as an art that you need to refine, especially in terms of duct strapping and brazing, it\u2019s easier to get engaged in your work and feel proud of it.<\/p>\n
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Another way to stop from getting bored is to do more things that challenge you. Being constantly challenged and being out of your comfort zone keeps you interested and can even spark a new passion.<\/p>\n
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Pursuing mastery allows you to focus on one particular skill or subject to become an expert. When you master a skill, you also become a marketable job candidate and can carve out a niche within your organization. Mastery is about going deep rather than wide, and more people will feel enriched by working towards mastery than others.<\/p>\n
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If you\u2019re a social person, finding a community can keep you from getting bored. When you have a community, you will be around people who have the same interests and experience the same challenges as you. So, you won\u2019t get bored from feeling alone.<\/p>\n
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Mentorship is another way to rekindle your passion. When you choose to invest in and guide less experienced people in the trade, you can feel a renewed sense of purpose in your work.\u00a0<\/p>\n
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And if you\u2019re REALLY bored, you can change everything up entirely and try something new.<\/p>\n
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If you have an iPhone, subscribe to the podcast HERE<\/a>, and if you have an Android phone, subscribe HERE<\/a>.<\/p>\n
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Check out our handy calculators HERE<\/a>.<\/p>\n
Check out information on the 2022 HVACR Training Symposium at \/\/www.desamelle.com\/symposium\/<\/a>.<\/p>\n","author":"Bryan Orr","date":"10\/19\/2021","link":"https:\/\/traffic.libsyn.com\/secure\/hvacschool\/Fighting_Boredom_at_Work_-_Short_129.mp3","src":"https:\/\/traffic.libsyn.com\/secure\/hvacschool\/Fighting_Boredom_at_Work_-_Short_129.mp3?dest-id=425611","featured":"\/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Fighting_Boredom_at_Work_-_Short_129-768x768.jpg","mediatype":"audio","featured_id":75915,"key":"23320b86d146c620dbcb1f8cb6707db1","fset":"\/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Fighting_Boredom_at_Work_-_Short_129-768x768.jpg 768w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Fighting_Boredom_at_Work_-_Short_129-300x300.jpg 300w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Fighting_Boredom_at_Work_-_Short_129-1024x1024.jpg 1024w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Fighting_Boredom_at_Work_-_Short_129-150x150.jpg 150w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Fighting_Boredom_at_Work_-_Short_129-1536x1536.jpg 1536w, \/\/www.desamelle.com\/wp-content\/uploads\/2021\/10\/Fighting_Boredom_at_Work_-_Short_129-2048x2048.jpg 2048w"},"ppe-9873-4":{"title":"Review Of Vacuum For Service Revisted","description":"
In this podcast episode, Bryan goes through the addendum to the book Review of Vacuum for Service Engineers<\/em>. He and Jim Bergmann had the honor of revising the latest edition in 2020. You can get the latest edition of Review of Vacuum for Service Engineers<\/em> from TruTech Tools HERE<\/a>.<\/p>\n
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Pulling a Schrader core before evacuation makes a big difference in the speed of the evacuation. You can use a core remover tool to pull the cores when the system is NOT pressurized.\u00a0<\/p>\n
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There are three common types of ports to access the system: the Schrader core, high-flow core (CoreMax), and the multi-position service valve. You can mid-seat the multi-position service valve for high flow, but you need to remove or depress cores on the other two port types. (You must use a special CoreMax CRT to remove high-flow cores.)<\/p>\n
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Three factors limit the speed of evacuation: the conductance speed of the pump, of the connecting hoses, and of the system. The hoses and manifold can severely impact evacuation. TXV and piston metering devices have short orifices and have very little impact on the evacuation time; on TXVs and EXVs, the valve should be fully open.<\/p>\n
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When pulling a vacuum, make sure the vacuum pump works properly and has clean oil. Once you know that the pump is working, only pull on a tight system (no leaks) and make sure the seals are in good shape.\u00a0\u00a0<\/p>\n
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Bryan also discusses:<\/p>\n

查看我们最新的技术提示
大修期间的维护深呼吸：暖通空调系统中的呼吸危害 W1、W2和E

制冷技术

毒液包冷凝器纯浓缩线圈清洁剂
Venom Pack冷凝器清洁剂是一种高泡沫纯浓缩液，用于处理最坚硬的土壤。专用洗涤剂的专有混合物将使大量嵌入的油脂和污垢液化，以恢复传热并提高盘管的效率。

Viper冷凝盘和排水管处理
Viper凝析油盘和排水管处理是一种可喷雾凝胶。它在盘、p型存水弯和排水管上覆盖一层润滑膜，以改善流动性并防止未来土壤粘附。缓慢溶解的酶凝胶将优于并超过传统的片剂和板条。

尼龙蓝垫圈-用于交流/R系统的螺纹密封胶
在连接核心工具、软管或真空计之前，在橡胶软管垫圈上滴一滴Nylog，可以确保在排空过程中不会发生粘合或泄漏。源自制冷级润滑剂。不硬化、不干燥的液体，与许多不同的基材紧密结合。通常，一滴Nylog在破裂前可以拉伸约三英尺。

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