Showing posts with label gas furnace. Show all posts
Showing posts with label gas furnace. Show all posts

Tuesday, 22 October 2019

Configurations of a Natural Gas Garage Heater

Natural gas garage heaters blow air straight into the room. Their adjustable louvers permit for perpendicular adjustment of the flow. Almost all the manufacturers provide horizontal louvers that help the air to flow side-to-side. These furnaces have several different categories based on the design of the heat exchanger and the venting type:

Types of Venting

Gravity vented garage furnace:

Gravity vented garage furnaces are heaters that vent naturally and do not need a fan. These furnaces make use of the air inside the garage for ignition. The warm derivatives of combustion come out of the furnace with the help of a gas pipe. They are the least expensive.

Power vented furnace:

Very similar to the gravity vented furnace, these devices have an additional flue-vent booster fan. As soon as the heat is produced, the fan starts to make sure that the derivatives of combustion are properly vented out. These furnaces are the most popular among consumers. The booster fan gives more elasticity with flue pipe.

In fact, most of the major manufacturers of heating, devices are eliminating the production of gravity vented furnaces and are substituting them with power vented heaters. These heaters also allow horizontal venting.

Image Courtesy: Pixabay
Separated combustion furnaces for the garages:

These forms of heaters are becoming popular by the day. While the conventional power and gravity furnaces make use of space air for ignition, separated combustion furnaces are sealed. These heaters have a couple of flue vent pipes. While one pipe is used to draw in the air from the atmosphere, the other throws the by-products outside. This sealed combustion design removes the possibility of the burning of air inside the garage.

Such heaters work well in places where fine dust particles can catch fire due to an open flame. Moreover, separated combustion furnaces are normally more competent, as they do not make use of the air in one’s space for ignition.

Heat exchanger designs:

Traditional natural gas furnaces for the garage:

These furnaces are narrow and tall. However, since most find them inconvenient, manufacturers are turning towards the newer exchanger designs.

Tubular heat exchanges:

These exchanges are flexible and defy cracking. They allow the furnace to be shorter and wider, which is of great assistance in garages that lack overhead clearance.

How are natural gas garage heaters installed?

Following is the method by which one can install these furnaces

• Hang the furnace by making use of the angle iron or threaded rods. Several heaters contain angle iron which helps them mount straight to the ceiling. However, do remember that when you are mounting a heater you need to follow specifications as to how close the furnace can be mounted to a ceiling or object.

• Install the gas piping.

• Install the vent pipe.

• Wire a wall thermostat (with a low voltage) to the terminal strip of the furnace. 

• Wire the elevated voltage power needed to start the furnace.

Natural gas garage heaters are capable of running any time. They do not require a person to worry about the fuel supply. However, it is best to get in touch with an HVAC expert if you need help with the installation or maintenance of the equipment. 

Tuesday, 24 May 2016

How to troubleshoot a gas furnace?

A gas furnace is a piece of equipment that takes in cold air, uses an air filter to clean it, heats it with the help of a gas burner and distributes the warm air through the ductwork. The heated air helps to increase room temperature during the cold winter days. Furnaces come with different efficiencies. However, once in a while these appliances may not work quite right and you may have to troubleshoot them. 

Let's look at the most common problems you may have to face with a conventional furnace.

Gas Furnace does not produce any heat:

Possible causes:

  1. Thermostat not working
  2. Propane or natural gas control valve is closed
  3. Circuit breaker or fuse that is controlling the gas furnace is tripped or blown
Best possible repairs:

  1. Check if the thermostat has the right temperature setting
  2. Try to move the dial setting down or up a few degrees
  3. Clean contacts in a non-digital thermostat
  4. If the circuit breaker has tripped, reset it
  5. Relight the standing pilot light
Blower is always running:  
   
Possible causes:

  1. Thermostat has been fixed to run fan continuously
  2. Defective control switch for fan limit
Best possible repairs:

  1. Change the fan setting on the thermostat
  2. Replace or reset furnace fan control switch
Gas furnace produces less heat

Possible causes:

  1. The air filter is dirty
  2. The gas burner is dirty or requires adjustment
  3. Air flow is blocked to the combustion air chamber
Best possible repairs:

  1. Clean or replace the dirty air filter
  2. Call a professional service provider to get the burners adjusted.
  3. Make sure the furnace has enough combustion air.
Noisy operation of gas furnace

Possible causes:

  1. A "squealing" sound caused by slipping motor or shaft bearings or blower belt that requires oiling
  2. Slight "rumble" when the burner is off may be caused due to wrongly adjusted pilot light.
  3. Slight "rumble" sound when the burner is on is caused by dirty gas burners.
Best possible repairs:

  1. Use a light weight oil to lubricate the blower motor lubrication ports located at the end of the shaft
  2. Check for correct belt tension. If it’s loose, make sure you tighten the belt.
  3. Adjust pilot light
  4. Replace frayed belt
  5. Call a technician to get the burners cleaned or adjusted.
Pilot light is out

Possible causes:

  1. Dirty orifice, a strong draft, or dirt inside the gas tube can lead to a pilot light going out.
  2. A faulty thermocouple may also shut off the supply of gas.
Best possible repairs:

  1. Ensure that your thermostat is on "Heat" mode.
  2. Find the pilot.
  3. In case you have a pilot that has a red Reset button, turn "Off," the gas valve to "Pilot."
  4. In case you have a pilot that has no red button, turn the dial from "Off" to "Pilot."
  5. Depress the knob or hold the button and light the pilot using a lighter.
  6. After the furnace burners ignite, regulate the thermostat to the preferred setting.
Sometimes your gas furnace may act out and may require repair. You can follow the tips mentioned above or call a technician to fix the problem. If the issue seems complicated, it is best to seek professional help.