YYE109A YT212001-AB/4 YYE 109A 控制器输入扩展卡 ABB
这种类型的装置常见于空气中水分去除不多的环境
涉及从外部空气入口开始，空气进入外部空气管道，并与来自
过滤器（B）前的空间。该混合空气被吸入一组过滤器，其中杂质被去除。这个
然后，空气经过一组加热线圈（C），必要时，在那里被加热到所需温度。下一个
空气通过一组冷却盘管（D）；在这里，如有必要，可将其合理地冷却至所需温度。之后
在冷却盘管中，空气经过一组加湿管。如果空气的相对湿度太低
管道会在空气通过时增加水分。在加湿器之后，空气被吸入送风机（F），送风机
推动其通过供水管网、扩散器并进入空间。回风机（G）将吸入空气
并将其推过回流管道系统。空气被排出或返回至待处理装置
与外部空气混合，重新开始循环。
制冷剂/供暖供应：
冷却盘管来自冷却源，如冷却器、冷却塔或DX装置。制冷剂
进入冷却盘管，从通过盘管的空气中吸收热量，并返回热源以解吸热量
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它接受了。
加热线圈由热源（例如锅炉或电力）供给。来自这些线圈的热量被传递
对经过它的空气。
系统变化：
1.系统可以具有多组过滤器以去除不同水平的杂质。
2.冷却盘管可位于外部空气风门之前，用于预冷却。
3.系统可利用旁路设置，其中如果不需要，空气可转向通过盘管
被治疗。
4.加湿管可能不在每个单元中，也可能在之前在管道系统中更远的位置
扩散器。
5.如果送风机产生足够的吸力来抽吸空气，则每个机组上可能不存在回风机
通过系统返回。
预热系统
组件/布局：
阻尼器
过滤器
冷却盘管
加热线圈
加湿净化器
送风机
回风机
预热线圈
空气流量：
该系统是使用预热盘管（H）的标准空气处理装置。该线圈应仅在以下情况下运行：
冬季月份，如果室外空气低于冰点。该线圈的目的是预热进入的外部空气，或
混合空气以防止冷却盘管（C）冻结。这些装置通常位于较冷地区，其中：
冬季低温的风险更大。从外部空气入口开始，空气进入外部空气管道
并由预热线圈加热。然后，空气与过滤器前空间的返回空气混合
（B） 。该混合空气被吸入一组过滤器，其中杂质被去除。当空气移动时，它经过
在一组冷却盘管（C）上，此处空气被冷却，根据通过空气的露点，可以
被除湿。然后，空气经过一组加热线圈（D），在那里被加热到所需温度，如果：
必需的在加热盘管之后，空气将通过一组加湿管（E）。如果相对湿度
如果通过的空气温度过低，这些管道将在空气通过时增加水分。加湿后，空气
通过送风机（F）拉动，送风机将推动送风机穿过送风管道、扩散器并进入
空间。然后，回风机（G）从空间吸入空气，并推动空气通过回风管道系统。空气
排气或返回装置与外部空气混合，并重新开始循环
YYE109A YT212001-AB/4 YYE 109A 控制器输入扩展卡 ABB
YYE109A YT212001-AB/4 YYE 109A 控制器输入扩展卡 ABB
his type of unit is most common in environments where moisture removal from the air is not much of a
concern. Starting at the outside air intake, air enters the outside air duct and is mixed with return air from the
space just before the filters (B). This mixed air is pulled through a set of filters where impurities are removed. The
air then passes over a set of heating coils (C) where it is heated to the required temperature if necessary. Next the
air passes over a set of cooling coils (D); here it is sensibly cooled to the desired temperature if necessary. After
the cooling coil the air passes over a set of humidification tubes. If the relative humidity of the air is too low these
tubes will add moisture to the air as it passes. After the humidifiers, the air is pulled into the supply fan (F), which
pushes it through the supply ductwork, through the diffusers and into the space. The return fan (G) will pull in air
from the space and push it through the return ductwork. The air is either exhausted or returned to the unit to be
mixed with outside air and start the cycle all over again.
Refrigerant/Heating Supply:
The cooling coils are fed from a source of cooling, such as chillers, a cooling tower, or DX unit. The refrigerant
enters the cooling coils, absorbs heat from the air passing the coils, and returns to the source to desorb the heat
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that it took in.
The heating coils are fed from a heat source such as a boiler or electricity. The heat from these coils is transferred
to the air passing over it.
System Variations:
1. A system may have multiple sets of filters to remove different levels of impurities.
2. A cooling coil may be before the outside air dampers for pre-cooling.
3. The system may utilize a bypass setup where the air can be diverted past the coil(s) if it does not need to
be treated.
4. Humidification tubes may not be present in every unit or may be farther down in the ductwork just before
the diffusers.
5. A return fan may not be present on every unit if the supply fan creates enough of a draw to pull the air
back through the system.
Preheat System
Components/Layout:
Dampers
Filters
Cooling Coil
Heating Coil
Humidifier
Supply Fan
Return Fan
Preheat Coils
Air Flow:
This system is a standard air handling unit that utilizes a preheat coil (H). This coil should only operate during
the winter months, if the outside air is below freezing. The goal of this coil is to preheat the incoming outside or
mixed air to prevent the cooling coil (C) from freezing. These units are typically found in colder regions where
there is greater risk of low winter temperatures. Starting at the outside air intake, air enters the outside air duct
and is heated by the pre-heat coil. The air is then mixed with return air from the space just before the filters
(B). This mixed air is pulled through a set of filters where impurities are removed. As the air moves it passes
over a set of cooling coils (C), here the air is cooled and depending on the dew point of the passing air, may be
dehumidified. The air then passes over a set of heating coils (D) where it is heated to the required temperature if
necessary. Following the heating coil the air will pass over a set of humidification tubes (E). If the relative humidity
of the passing air is too low these tubes will add moisture to the air as it passes. After humidification, the air is
pulled through the supply fan (F), which will push it through the supply ductwork, through the diffusers and into
the space. The return fan (G) then pulls in air from the space and pushes it through the return ductwork. The air
is either exhausted or returned to the unit to be mixed with outside air and start the cycle all over again
YYE109A YT212001-AB/4 YYE 109A 控制器输入扩展卡 ABB
