Munters Corp Dehumidifier Installation Instructions
Munters Corp dehumidifiers provide precise, dependable humidity control, helping prevent mold growth, protect sensitive materials and improve indoor comfort. Since proper setup of these units is critical to performance, these Munters Corp dehumidifier installation instructions will help you position, connect, power and adjust the machine to ensure proper operation.
This guide is for HC-150 and HC-300 desiccant dehumidifier models.
Unpacking the Unit
- Step 1. Remove the shipping cover - Take off the protective covering and remove the packaging constraints.
- Step 2. Check for damage during shipping - Look over the unit and make sure it wasn’t damaged during shipping.
- Step 3. Inspect the essential parts - Ensure all critical components are present, aligned and undamaged, such as that the HoneyCombe® wheel, drive belt and air filters are in place and the rollers are free of grease. For a full list of parts to inspect, refer to the owner’s manual.
Positioning the Dehumidifier
- Step 1. Identify the area you want to dehumidify - Choose the room or space where you want to manage humidity levels. Note that if the machine is connected to an air handler unit, it can dehumidify a larger area more effectively.
- Step 2. Decide on an installation position - Select the best installation configuration based on your space and needs as listed below:
- Unit installed in the room being dehumidified
- Unit installed in a separate room and connected with ductwork
- Unit connected to an existing air handler unit to dehumidify a larger space
- Step 3. Check unit dimensions against space constraints - Make sure the installation location is large enough to fit the unit. Refer to the user’s manual for the exact dimensions of your model.
- Step 4. Ensure adequate space for servicing and airflow - Make sure this space provides 24" (61CM) of clearance directly in front of the machine so the HoneyCombe® wheel can be removed and replaced. If ductwork isn’t installed, HC-300 units also need 12" (30.5CM) of open space in front of the process air intake and 12" (30.5CM) in front of the reactivation air intake to allow smooth airflow. Note that HC-150 machines need 7” (18CM) of equivalent clearance.
- Step 5. Position the process and reactivation air inlets/outlets - Check that the process air intake receives air from the space you want to dehumidify and the process air outlet vents to the same room. Conversely, the reactivation air inlet should take in air from a separate room and the reactivation air outlet should vent outdoors. Additionally, be sure that all air inlets and outlets are at least 5 feet apart.
- Step 6. Cover the outdoor air inlets/outlets - Protect outdoor air inlets and outlets by installing weather hoods and bird screens over them.
- Step 7. Ensure connectivity with the air handler (if necessary) - Connect both sides of the dehumidifier to the air handler upstream of the unit when integrating the machine into a building’s existing climate control system.
Connecting the Ductwork
- Step 1. Determine if process air inlet/outlet ductwork is necessary - Decide whether ductwork is needed based on your installation configuration. Ductwork is optional when the unit is installed in the same room it’s dehumidifying but required in all other setups. Even when optional, adding ductwork to the process air inlets/outlets will improve operational efficiency.
- Step 2. Install the ductwork - Contact an authorized technician to connect the ductwork.
- Step 3. Ensure proper installation of the reactivation outlet duct - Be sure that the reactivation air outlet duct is insulated and sloped to keep condensation from forming and pooling inside the machine.
- Step 4. Make sure dampers are installed - See that a damper is placed downstream of both the process and reactivation air outlets to regulate airflow. The reactivation damper should be mounted horizontally so it operates correctly.
Powering the Machine
- Step 1. Ensure proper electrical supply - Check the nameplate on the unit to ensure the installation location can meet its current and voltage requirements. If needed, contact a licensed electrician for assistance.
- Step 2. Wire the unit - Contact an authorized electrician to wire the machine.
- Step 3. Install the humidistat - Select a location for the humidistat in the space you wish to dehumidify. For best results, mount the humidistat near the process air inlet and away from the floor, ceiling, doors or windows.
Adjusting the Dampers
- Step 1. Connect the unit to power - Use the circuit breaker to deliver power to the machine.
- Step 2. Turn on the machine - Set the Auto/Off/Manual switch to Manual to turn on the unit.
- Step 3. Warm up the unit to 120°F - Allow the unit to warm up for 30 minutes and then check the temperature at the reactivation air outlet: it should read 120°F ±5°F (49°C ± 3°C). If the temperature is below this, close the process damper completely, wait 10 minutes and check the temperature again—the temperature should now be at least 120°F (49°C).
- Step 4. Adjust the process air damper - Open the process damper slightly, wait 10 minutes and then check the reactivation outlet temperature again—it should be at or just below 120°F (49°C). If the temperature is still too high, continue opening the process damper in small increments, waiting 10 minutes each time, until the temperature falls to or slightly below 120°F (49°C). This is the correct setting for the process damper.
- Step 5. Set the reactivation damper - Find the correct position of the reactivation damper by closing it a bit, waiting 10 minutes and then checking the temperature at the reactivation outlet. If it’s 120°F ±5°F (49°C ± 3°C), repeat this process until the temperature falls below 115°F (46°C)—the correct position is the previous damper setting.
Munters Corp Dehumidifier Installation FAQs
Does the unit have to be installed in the room it’s dehumidifying?
No. While the unit can be installed in the same space it’s drying, it doesn’t have to be. It may also be placed in another room and connected to the target area using ductwork, or integrated with an air‑handling unit to dehumidify a larger space.
Do I Have To Connect the Unit to Ductwork?
Munters Corp HC‑150 and HC‑300 dehumidifiers may need ductwork depending on the installation configuration. If the unit is in the same room it’s dehumidifying, the process air inlet and outlet don’t require ductwork—but adding ducts can help improve airflow. However, regardless of the installation method, the reactivation air inlet and outlet always require ductwork.
Does the Unit Have a Thermostat?
No. Munters Corp dehumidifiers have humidistats–not thermostats–that allow users to raise or lower the humidity level in the target space. For temperature control, adjust the thermostat settings for the heating and cooling system.