Fan coil unit

Fan coil unit

Here we we have breakdown drawings and diagrams of Piston air compressors reciprocating aka “Recip” as well as for Rotary Screw air compressors. There are other types, but the vast majority of air compressors in use today are one of these two types. In general they consist of an air pump, a motor or engine and a tank to hold the compressed air. There are many different parts and pieces that make up an air compressor. Although some may be fairly generic, most parts will vary depending on the make and model of the compressor. Many of their parts can be interchangeable, such as check valves and filters.

Air Compressor Anatomy 101

Power is transmitted from the engine through a continuously-variable clutch system to the transaxle. Key elements of the drive system include: Variable-speed drive The variable-speed drive consists of two clutches and a drive belt: Drive clutch is attached to the engine. Driven clutch is attached to the transaxle. The engine braking system utilizes a tight belt for operation, requiring an idler sleeve on the primary clutch for neutral.

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I have the diagrams but I am not confident in interpreting the diagram s. However, it won’t be sufficient to tell me to follow the motor diagram or any other diagram. I found the diagram s online but can’t interpret them I need to know exactly what to do Thanks in advance for your help. On the diagram it doesn’t show what note 7 says can you tell me what note 7 on the diagram says?

Installation Instructions

Differential pressure gage, range Air and non-combustible, compatible gases natural gas option available. May be used with hydrogen. Order a Buna-N diaphragm. Pressures must be less than 35 psi.

Installation, Calibration, Trouble-shooting, Loop Checking, Instrument Calibration and functionality test as per ITP schedule for the field process Instruments, Instrumentation Panels & Skids, HVAC systems, AHU, RTU, RMCS, TELECOM PANEL, etc.

Guide to Installing Condensing Units Jun 12, By Robert Thornton When it comes to installing a condensing unit, some initial planning and prep work can help streamline the process. By surveying the general equipment layout and the specific refrigeration system, labor time can be greatly reduced and a proper installation is guaranteed. There are numerous components to consider in a condensing unit installation in comparison to an evaporator installation.

These components offer many advantages, depending on the application, and can protect the compressor, offer capacity control in varying loads, direct hot gas to a heat reclaim, provide defrost for air, electric, or hot gas evaporators, ensure proper oil in a compressor crankcase, offer quick checks of refrigerant levels, and many other functions.

Fortunately, the actual mounting of a condensing unit is much easier than an evaporator, since there is no hanging on a ceiling or wall. Keeping these factors in mind, here are 10 tips for a successful condensing unit installation: Before placing the unit, make sure the model, voltage, phase and refrigerant type are correct. The capacity of the condensing unit should match the application of the evaporator, and the refrigerant should be the same as the evaporator and its components.

Reference the installation manual for helpful suggestions during the installation and start up process, such as mounting, piping, wiring, charging, and more. Select a location in which the unit can be serviced easily and is strong enough to support the weight. After the unit is set in place, discard all shipping materials. Shipping materials should never be used for mounting.

Instead, use steel framing or treated lumber and make sure to level the unit.

HVAC technology

Power supplies may be indicated by solid lines or by dashed or dotted lines. Most schematics use straight lines to represent the wires that connect components to each other. Not all manufacturers follow the same schematic diagram practices and you will see several different styles of wiring diagrams. If dots are used to show junctions, then intersecting lines without dots mean that the two wires cross without connecting.

If loops or jumps are used to depict crossovers, then wires that meet—even without dots—are connected.

Details Quick Links: Specifications Accessories Documents Reviews Q&A Expert Assistance This return air support box is for use with systems where the return air .

Below we will describe to you how to hook up a digital thermostat, hook up a programmable thermostat, or hook up any type for that matter. Whether the old thermostat is bad or not if you simply want to replace your old one and hook up a new one the first thing you need to take into consideration is to select the right replacement thermostat. To select the correct replacement you need to know what kind of HVAC equipment you have in your home or where you want to hook up the new thermostat.

There are numerous types of air conditioner and heating combinations so in this article, we will cover a basic gas furnace and air conditioner split system HVAC system. Thermostat Wiring Colors Code – Learn More about the Thermostat Installation opens in a new window How to Hook Up a Home Thermostat If you do not know what kind of unit you have to take a look at the paperwork from the last time the unit was serviced.

Perhaps it will show the type of equipment on the service ticket where the unit had maintenance. It is assumed that most people will know what kind of unit they have so that they can select the proper thermostat. It is best to place the thermostat in the same location as the old thermostat. Moving the thermostat to a new location is not recommended unless you hire an HVAC professional to relocate the thermostat first. Thermostats need to be located in a strategic area of the home to be effective and work properly.

Besides, you would have to pull new thermostat wire through the wall to relocate the thermostat and that is a big job for anyone. A small drop cloth or paper can also be used to place on the floor below the thermostat to catch dust, debris, and other stuff that can fall on the floor.


From loans and leases to power-purchase agreements, there are a lot of options out there. To help you pick the one that might be best, we’ve created the handy decision tool below. We’ll ask you a few simple questions about you and your home. Once you’re done, we’ll recommend a good option. Further down this page, we provide cost estimates and example return-on-investment calculations for all the various options:

Installation Instructions. Our comprehensive installation instructions help ensure accurate and efficient installation of Lennox® products.

Lighting Selection of Lighting fixtures based on area utilization Design of lighting layout based on Lux Level of the area, reflection factors and software driven as per Indian Standards. Lighting Layout prepared as per ceiling plans for false ceiling areas. Forming the ethics of illumination power distribution with emergency lighting, exist and other warning signage Intelligent Lighting Bringing out the requirement of intelligent lighting area wise Requirement is frozen for hardware — Dimmers, Sensors, amplifiers, Hubs, Time clocks, Light sensors Lay outing of all elements and cable routing in a daisy chain leading to central console.

Voltage drop of the system and area of utilization and its de-ratings Cable routing for distribution of power, overhead and underground in trenches. Selection of cable tray sizes keeping in view of expansions in the project. Detailing is done for the mounting arrangement of cable trays. Switchyard direct lightining stroke protection DSLP and calculation. Switchyard electrical clearence diagram. Protection SLD for switchyard. Control room building panel arrangement.

Switchyard cable trench layout.

HVAC Controls

Where do you want to go? We had one issue we were not happy with our Ocean View – It was more like a Tower and Pool view I called and left a message for Cheryl and within an hour she had spoken to the hotel and had us moving to a better room the next day. My boyfriends sister in-law had recommended you. I usually do all the planning of my vacations From the very start Tim Shaw was very helpful and both him and Cheryl were always pleasant and helpful.

Betsy’s mTDI AHU Conversion Page. Betsy’s mTDI AHU Conversion Page. Betsy Bertha’s m-TDI – v The Details (my collected research before below work) Read this on how to hookup This is one of the “variables” that varies for what you want. The most common turbos tend to be.

A simple stylized diagram of the refrigeration cycle: Notice frost formation In the refrigeration cycle, heat is transported from a colder location to a hotter area. As heat would naturally flow in the opposite direction, work is required to achieve this. A refrigerator is an example of such a system, as it transports the heat out of the interior and into its environment.

The refrigerant is used as the medium which absorbs and removes heat from the space to be cooled and subsequently ejects that heat elsewhere. Circulating refrigerant vapor enters the compressor , where its pressure and temperature are increased. The hot, compressed refrigerant vapor is now at a temperature and pressure at which it can be condensed and is routed through a condenser. Here it is cooled by air flowing across the condenser coils and condensed into a liquid.

Thus, the circulating refrigerant removes heat from the system and the heat is carried away by the air. The removal of this heat can be greatly augmented by pouring water over the condenser coils, making it much cooler when it hits the expansion valve. The condensed, pressurized, and still usually somewhat hot liquid refrigerant is next routed through an expansion valve often nothing more than a pinhole in the system’s copper tubing where it undergoes an abrupt reduction in pressure.

That pressure reduction results in flash evaporation of a part of the liquid refrigerant, greatly lowering its temperature. Aircraft air conditioners use turbines for cooling, more efficient but more complex.

Design & Construction Standard Detail Drawings

From loans and leases to power-purchase agreements, there are a lot of options out there. To help you pick the one that might be best, we’ve created the handy decision tool below. We’ll ask you a few simple questions about you and your home. Once you’re done, we’ll recommend a good option. Further down this page, we provide cost estimates and example return-on-investment calculations for all the various options: Compare the Return of Different Solar Investments in Tennessee The chart above shows the year returns for an investment in solar in Tennessee.

Aprilaire Steam Humidifier with Automatic Digital Control. 9 Review(s) Write a review; The Aprilaire Steam Humidifier with Automatic Digital Control humidifies spaces up to 6, square feet. Great for large homes or spaces without a centralized heating system, this will be sure to meet your humidity needs! Product ://

In the Draw-Through type, the fan pulls the air through the mixing box, filters and cooling coil before discharging it from the fan outlet to the space to be conditioned or to the ducting network. The design can be vertical or horizontal. In this case, the section before the fan has negative pressure. In the Blow-Through type, the fan blows the air through the mixing box, filters and cooling coil before discharging them to the space being conditioned or the ducting system.

In this case, the section after the fan has positive pressure. Components of Air Handling Unit Here are some of the air handling unit components that may be contained in the equipment. Housing The housing that contains all the other components of an AHU is usually make of metal, some are painted to prevent corrosion. In sections where the fans and the coil are located, inches of polyurethane foam or PU is used to insulate them to prevent the condensation on the panel.

Drain pan is also used as a precaution in the event of condensation of water. Fan Centrifugal fan is used to circulate the air to the various parts of the sections in the building. The selection of the fan will depend on the air volume and the static pressure required of the system. Usually, the designer of the system will use a specialized software to do this selection. In order to reduce the effect of vibration on the panel, the motor and the fan are usually installed on the vibration isolator except when the drive assembly is external to the fan casing.

In recent years, the use of variable air volume VAV system is becoming more popular as the volume of the air being discharged can be varied depending on the load condition.


Design suitable for indoor and outdoor installation with IP: Also available are a wide selection of optional featuers to enable the customer to tailor the HWG to individual requirements without giving up the advantage of compact size and short delivery. KEPL Hot water Generators are supplied as complete packages with all components mounted, wired and plumbed as necessary to allow installation and startup with minimum efforts.

Compact boilers have a vertical vessel whereas high capacity units may be either vertical or horizontal.

Find out about ITEM: UTEB Building Chilled Water Connection (RE-BID) and other projects out for bid.

Those of us who inspect and repair HVAC systems for a living know that with the start of the AC season, the phone will begin to ring with cries from hysterical customers frantic about water dripping from their ceilings and water-soaked floors. Condensate may be behind their falling plaster and drenched carpets due to improper collection and control of this cooling-mode byproduct.

As air passes through the cooling coil of an air conditioner or heat pump, its temperature is lowered below the saturation point. While simultaneously hugging the fins of the coil and moving downward, moisture sucked from the air begins filling a collector positioned under the coil, which manufacturers call the primary condensate drain pan or just the condensate pan.

As the pan fills, it must continually drain to prevent it from overflowing and causing damage to the equipment and to the surroundings. The pan also must drain quickly and completely to prevent it from becoming an unhealthy pool of contaminants. Failure to do so can lead to personal and real property damage and even to life-threatening illnesses. Cased coils or coil boxes are often attached to furnaces. Photo from Carrier Literature Blow-through and draw-through systems The evaporators of air conditioners and the indoor coils of heat pumps, both used for cooling in summer, are installed so that a blower either pushes or pulls air over their cooling surfaces.

When air is pushed across, putting the coil under positive pressure, it is considered a blow-through or positive pressure system. When air is pulled across the coil, it is a draw-through or negative pressure system. The majority of air handlers used with heat pumps or with modern AC cooling-only systems are draw-through systems.

York Air Conditioner manuals

Thanks to all for prompt response HerrKaLeun Thanks for a good suggestion. DRWeig Sir, you have sent me good material i will study it and obviously it is better to reduce pressure drop on pump head by using it.

HVAC CHILLED WATER DISTRIBUTION SCHEMES A chilled water system is a cooling system in which chilled water is circulated throughout the building or through cooling coils in an HVAC system in order to provide space cooling.

Also, the term ‘Fan Coil Unit’ will mean different things to users, specifiers, and installers in different countries and regions, particularly in relation to product size and output capability. Fan Coil Unit design falls principally into two main types: As the names suggest, in the first type the fans are fitted such that they blow through the heat exchanger, and in the other type the fans are fitted after the coil such that they draw air through it.

Draw through units are considered thermally superior, as ordinarily they make better use of the heat exchanger. However they are more expensive, as they require a chassis to hold the fans whereas a blow-through unit typically consists of a set of fans bolted straight to a coil. A fan coil unit may be concealed or exposed within the room or area that it serves.

An exposed fan coil unit may be wall-mounted, freestanding or ceiling mounted, and will typically include an appropriate enclosure to protect and conceal the fan coil unit itself, with return air grille and supply air diffuser set into that enclosure to distribute the air. A concealed fan coil unit will typically be installed within an accessible ceiling void or services zone. It is quite common for the return air not to be ducted and to use the ceiling void as a return air plenum.

The coil receives hot or cold water from a central plant, and removes heat from or adds heat to the air through heat transfer. Traditionally fan coil units can contain their own internal thermostat , or can be wired to operate with a remote thermostat. However, and as is common in most modern buildings with a Building Energy Management System BEMS , the control of the fan coil unit will be by a local digital controller or outstation along with associated room temperature sensor and control valve actuators linked to the BEMS via a communication network, and therefore adjustable and controllable from a central point, such as a supervisors head end computer.

Fan coil units circulate hot or cold water through a coil in order to condition a space.

AHU Chilled Water Piping 1624

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