About Chilled Water Systems HVAC Hydronics

by | Commercial HVAC | 1 comment

About Chilled Water Systems About Chilled Water Systems HVAC Hydronics - Chilled water systems are mainly used in large commercial HVAC air conditioning systems and industrial cooling applications although there are some residential and light commercial HVAC chilled water systems in use. Chilled water systems are popular because they use water as a refrigerant. Water is far less expensive than refrigerants. This makes them cost-effective, especially in commercial HVAC air conditioning applications. (more…)

Hot Water Unit Heater Mechanical Room Protection

by | Commercial HVAC | 0 comments

Hot Water Unit Heater Protecting a Mechanical RoomHot Water Unit Heater Protecting Mechanical Room - Unit heaters are used in various places to protect equipment and provide comfort to occupants. This hot water unit heater provides protection for a mechanical room where there is a large air handler and other associated equipment in the mechanical room. This system is controlled by DDC. A thermostat on the wall detects the temperature of the mechanical room. (more…)

HVACR Pipe Soldering Brazing – Refrigeration Systems

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What You Will Learn in HVACR Pipe Soldering Brazing

  • Safety with Brazing and Soldering
  • Basic Soldering and Brazing
  • The Bread Trick with Water Pipes
  • Alternatives to the Bread Trick
  • Brazing with Oxyacetylene
  • Cleaning and Fluxing
  • Brazing with Nitrogen
  • Nitrogen Pressure Testing
  • Avoiding Problems with Oxidation

HVACR Pipe Soldering Brazing - In HVACR there are two major types of soldering done. Soft Soldering for soldering water pipes and brazing or silver soldering for soldering refrigeration piping. There are various techniques for both types of soldering and everyone develops their own in the field but it is important to follow the basics of soldering when joining the piping together. Following the basics of soldering will ensure success and we all enjoy a successful job completed.

As always safety is first with anything. Two big considerations must be adhered to when soldering or brazing:

  • Eye protection and burn protection for hot dripping soldering. Keep yourself safe when soldering or brazing.
  • The inherent risk of using an open flame around combustible materials. Always make sure you have a plan and use preventive techniques such as wet rags and fireproof clothe or barriers. This is especially true when soldering around wood or even outside (around a condenser) where pine needles or leaves can easily catch fire and spread rapidly. Always have either a hose or fire extinguisher handy.

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Heat Pump Types | HVAC Heating

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heat pump types

Trane Air Source Heat Pump Condenser

Heat Pump Types - There are different types of heat pumps available on the market today. A heat pump is an air conditioning unit that cools when the temperature is hot and heats when it is cold. There are many different types of these heat pump systems available. There is the geothermal heat pump. It can either utilize a series of closed-loop water pipes buried in the ground or other methods of heat exchange.  This process removes or absorbs heat for heating and cooling.

Air source heat pumps can be configured differently. One type of air source heating will utilize electric heating for backup heating while another may use a gas furnace for backup heating. These types of systems can also be split systems or package units and nearly all share a similar heat pump sequence of operation. A description of the various types of systems and how they work is below in this article on heat pump types. These systems utilize similar heat pump components but differ in how the heat pump works.

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