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Goodman Heat Pump Installation Instructions

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Installing a new Goodman heat pump can seem like a daunting task, but it’s not as difficult as you may think. There are some aspects you need to pay special attention to in order to ensure that the unit runs properly after it’s set up. Find the right Goodman heat pump installation instructions, and you’ll have your unit up and running in no time.

This guide covers the installation of a Goodman GSZC16 unit specifically.

Installation Clearances

Location is important. It’s recommended that there be a minimum of 60 inches between the top of the unit and any obstruction. This will help with circulation. Also, be sure to place the unit on a sturdy, level surface to avoid shifting.

Rooftop Installations

If the unit needs to be installed on the rooftop, ensure that the roof can support the weight properly. With the possibility of intense weather conditions, it’s important to keep the bottom and surrounding areas of the unit cleared. The base has cutouts to allow for drainage of frost and accumulated snow, but if the unit isn’t placed high enough off the surface, then there won’t be enough room for the water to drain out.

Installing Refrigerant Lines

Please note that this unit requires refrigerant grade copper tubing to connect the unit with the indoor evaporator. Follow these steps to install the refrigerant lines:

  • Step 1. Cut the tubing to size.
  • Step 2. Install the plugs to keep the tubing dry and clean.
  • Step 3. Fill any gaps around the tubing and wall with a pliable silicone-based caulk.

Leak Test the Unit

Using dry nitrogen and soapy water, pressure test the unit to find any leaks. If there are any found, repair them and repeat the pressure test until no leaks are present.

System Evacuation Procedure

Typically, the unit is shipped with the condensing unit liquid and suction valves closed. Be sure to evacuate the system before opening these valves. Here’s how to get started:

  • Connect the vacuum pump with 250 micron capability to the service valves.
  • Evacuate the system to 250 microns or less using the suction and liquid service valves.
  • Close the pump valve and hold the vacuum for 10 minutes.
    • If the pressure rises to 1000 microns or less and remains steady, then the unit is leak-free and can be started up.
    • If the pressure rises above 1000 microns, the unit has a small leak. Repair the leak and repeat this test.
    • If the pressure is above 2000 microns, there’s a significant leak and it needs to be repaired before repeating the test.


If you’re in need of troubleshooting tips or simply want more instructions on how to use this model, check out our Goodman manuals and diagrams.

Please contact a local authorized service agent who can help with this specific unit and all your heating and cooling needs.