How to install- Universal Series: Preparation and Setup!

The Ultimate Comfort Solution: 

This advanced heat pump system is your all-in-one solution for both heating and cooling your space year-round. It includes the condenser, air handler, and refrigerant lines—everything you need for optimal comfort.

With an impressive 18 to 20 SEER rating for energy-efficient cooling and a 10 to 10.5 HSPF rating for efficient heating, this system will keep your home perfectly comfortable no matter the season. Enjoy reliable, energy-saving performance all year long!

Please note: ductwork and electrical connections are not included.

 

For additional Product and Installation information- Universal Install Manual

 

Warning:
Improper use can lead to serious damage or injury. To keep you safe, the symbols below will appear throughout this manual to highlight critical instructions you must follow and hazardous actions to avoid. Stay alert to prevent accidents, injury, or property damage!

 

Prohibited:

1. Grounding is a Must: To prevent the risk of electric shock, make sure your air conditioner is properly grounded. Never connect the ground wire to gas pipes, water pipes, lightning arresters, or telephone wires.

2. Storage Space Matters: Store the unit in a well-ventilated area that matches the recommended room size for operation. Proper airflow is key!

3. Keep Away from Flames: The unit must be stored in a room free of continuous open flames (like an active gas appliance) and ignition sources (such as an electric heater). Safety first!

4. Proper Disposal of Materials: In compliance with federal, state, and local laws, ensure all packaging and transportation materials (including nails, metal or wooden parts, and plastic packing materials) are disposed of safely.

5. Clear the Area: Maintain a 5ft (1.5m) distance from any flammable surfaces to reduce risk.

6. External Static Pressure: The unit has been tested to perform at 0-0.8 inches W.C. of external static pressure. This applies to units with add-on heat pumps and ducted systems with supplementary heaters.

Warning: Follow Instructions for Safe Installation and Use!

1. Professional Installation Only: Installation must be carried out only by authorized personnel in accordance with the NEC and CEC requirements. Always follow this manual carefully for proper installation.

2. Certified Refrigerant Handling: Anyone working with or opening a refrigerant circuit must hold a valid certificate from an industry-accredited authority, proving their competence to handle refrigerants safely.

3. Servicing Guidelines: Always follow the manufacturer’s recommendations when servicing the unit to ensure safe and effective maintenance.

4. Adhere to Wiring Regulations: The appliance must be installed according to national wiring regulations to ensure proper functionality and safety.

5. Safety First with Wiring: The fixed wires connected to the appliance must be configured with an all-pole disconnection device under voltage grade III in accordance with wiring rules.

6. Protect During Storage: Store the air conditioner with protective measures to prevent mechanical damage during transit or storage.

7. Use Only Specialized Accessories: During installation, always use specialized accessories and components. Failing to do so can lead to water leakage, electric shock, or even fire hazards.

8. Ensure Secure Installation: Install the air conditioner in a secure place that can support its weight. Unstable installations can cause the unit to fall, leading to injury.

9. Independent Power Circuit: The unit requires an independent power circuit. If the power cord is damaged, it must be repaired by a qualified technician or service agent.

10. Turn Off Power Before Cleaning: Always turn off and disconnect power before cleaning the unit to avoid the risk of electric shock.

11. Supervision for Children: Children should never clean or maintain the air conditioner without adult supervision. Always ensure they don’t play with the unit.

12. Never Alter Protective Devices: Do not alter the settings of the pressure sensor or other protective devices. Tampering with them can lead to fire hazards or even explosions.

13. Dry Hands and Keep Water Away: Never operate the air conditioner with wet hands, and never spray or wash the unit with water. Doing so can cause malfunctions or electric shock.

14. Avoid Naked Flames and Air Blowers on Filters: Do not dry the filter with a naked flame or air blower, as this can cause the filter to warp or break.

15. Ventilate Small Spaces: If installing in a small space, ensure protective measures are in place to prevent refrigerant concentration from exceeding safety limits. Excessive leakage can lead to explosions.

16. Supervise Vulnerable Users: This appliance is not intended for use by individuals with reduced physical, sensory, or mental capabilities, unless supervised or properly instructed. Children should be closely supervised to prevent them from playing with the appliance.

Caution: Stay Safe and Follow These Important Guidelines!

1. Keep Hands and Objects Away: Never place your finger or any other objects into the air inlet or return air grill. Always keep these areas clear to prevent injury.

2. Safety First with Refrigerant Pipes: Before touching any refrigerant pipes, make sure to take necessary safety precautions. Injury could occur if not handled properly.

3. Drain Pipe Setup: Be sure to arrange the drain pipe exactly as outlined in the instruction manual for optimal operation.

4. Never Cut Power Directly: Never stop the air conditioner by cutting off the power directly. Always follow the correct shutdown procedures to avoid damage.

5. Avoid These Installation Locations:

   • Oil, smoke, or volatile liquids: These can cause plastic parts to deteriorate, fall off, or cause water leakage.
   • Corrosive gases: These can lead to corrosion of copper pipes or welding parts, which could result in refrigerant leakage.

6. Protect from Small Animals: Ensure the unit is protected from small animals, as they could damage electrical components, causing a malfunction.

7. Not for Hazardous Environments: Do not install the air conditioner in corrosive, flammable, or explosive environments to prevent risks of fire or injury.

8. Improper Handling = Serious Risks: Improper installation, adjustments, or service can lead to explosions, fires, electrical shocks, or other hazardous situations that could result in death, personal injury, or property damage. Always consult a qualified installer or service agency for assistance.

9. Use Factory-Authorized Parts: Only use factory-authorized kits or accessories when making any modifications to the unit. Follow the specific instructions that come with the kits for safe installation.

10. Always Follow Safety Protocols: When working on or installing the unit, wear safety glasses, protective clothing, and work gloves. Use a quenching cloth for brazing operations and always have a fire extinguisher nearby for emergencies.

Important: Notes for Safe and Efficient Operation!

1. Connect the Thermostat First: If you’re using a thermostat, connect it first before powering up the unit to ensure proper functionality. Failure to do so may cause the thermostat to malfunction.

2. Cleaning the Unit: To clean the casing, use only a soft, dry cloth or a slightly damp cloth with neutral detergent. Avoid harsh chemicals or abrasive cleaners to protect the finish.

3. Pre-Power Up for Low Temperature Use: Before using the unit in low temperatures, connect it to power for 8 hours. If it’s been off for a short period (like overnight), do not cut off the power. This ensures compressor protection.

4. Compressor Reliability: To maintain the compressor’s reliability, the unit ensures the compressor runs for at least 6 minutes each time it turns on, regardless of the room temperature. For optimal performance, choose a thermostat with a minimum compressor run time or introduce a slight delay before turning off the indoor unit after the outdoor unit stops. This avoids malfunctions when the thermostat turns off the indoor unit while the outdoor unit is still running.

5. Standby Power Consumption: The unit may use a small amount of power in standby mode to maintain communication and preheat the refrigerant and lubricant. If you won’t be using the unit for a long time, turn off the power. Before reusing, power the unit up again to allow time for preheating.

6. Model Selection: Always choose the right model for the environment where it will be used. Incorrect selection could affect performance.

7. Professional Installation & Maintenance: If the unit needs installation, relocation, or maintenance, always contact your designated dealer or local service center for expert assistance. Do not attempt to disassemble or repair the unit yourself, as this can cause damage, and the company will not be liable for issues.

8. Product Improvements: All illustrations and details in the manual are for reference purposes. We’re continuously improving the product, so check online documentation for the most up-to-date version if any changes are made.

9. Consult Local Codes: Be sure to check local building codes and the National Electrical Code (NEC) for any specific requirements before installation.

10. Read Carefully & Follow Instructions: Always read through these instructions thoroughly and follow any warnings or cautions to ensure safe and efficient operation of the unit.

 

Ready to Go: Fully Assembled & Ready for Action!

The unit comes completely pre-assembled, piped, and wired right from the factory, making it ready for easy, one-piece shipping and installation. To ensure safe storage and shipping, each unit is pressurized with a holding charge of R410A.

With its compact design, sleek appearance, highly durable anti-rust cabinet, and whisper-quiet operation, this unit is the perfect fit for homes, offices, restaurants, and residential spaces—anywhere you want reliable, efficient cooling or heating. Comfort has never looked so good!

 

Operating Range:

Outdoor Ambient Temperature	Outdoor Temperature
Cooling	23°F~125.6°F (-5°C~52°C)
Heating	-22°F~75.2°F (-30°C~24°C)

 

Designed for Compliance & Safety

This product is carefully engineered and manufactured to meet all national codes for optimal performance and safety. However, it is the installer’s responsibility to ensure the product is installed in full compliance with national, local codes, and regulations.

Please note:

The manufacturer cannot be held liable for any equipment installed in violation of these codes or regulations. Proper installation ensures safety and efficiency, so always follow the guidelines closely!

 

 

Product Verification – Ensure Everything is Perfect!

Once you receive the product, inspect it carefully for any damage from transportation. Please note, shipping damage is the carrier’s responsibility. Before installation, double-check that the model number, specifications, and accessories are all correct. Claims for transportation damage or incorrect shipments will not be accepted by the distributor or manufacturer, so it’s essential to verify everything before proceeding!

Replacement Parts – We’ve Got You Covered!

If you encounter any shortages or damages or need to order replacement parts, make sure to provide the complete model and serial numbers stamped on the product. Replacement parts are readily available through your contractor or local distributor to keep your system running smoothly!

 

Warning:

• Install on a sturdy surface capable of supporting the weight of the unit. Ensure it is properly secured—an unstable installation could cause the unit to fall over, leading to potential damage or injury.
• Avoid installation in areas where there’s a risk of combustible gas leakage.
• Keep the unit clear of areas with flammable gas leaks to ensure safe operation and prevent hazardous situations. Your safety is our top priority!

 

Choose the Perfect Spot for Your Air Conditioner Installation!

For optimal performance and peace of mind, select an installation location with the following in mind:

1. Consider Your Neighbors – Install in a spot where noise and airflow won’t disturb anyone nearby.
2. Safety First – Make sure the location is animal-free and plant-free. If necessary, install safety fences to protect the unit.
3. Breathe Easy – Choose a place with excellent ventilation, ensuring there are no obstacles to block the air inlet or outlet.
4. Sturdy Support – The installation site should be robust enough to handle the weight and vibrations of the air conditioner for secure, safe installation.
5. Steer Clear of Hazardous Areas – Avoid spots with flammable gas leaks, oil smoke, or corrosive gases.
6. Avoid Strong Winds – Strong winds can disrupt the condenser fan, reducing airflow and affecting performance. Choose a sheltered location to maintain peak efficiency.
7. Keep It Quiet – Stay away from areas where objects may cause noise and disrupt the unit’s operation.
8. Easy Drainage – Install where condensate can drain easily to avoid water buildup.
9. Keep it Away from Bedrooms – Avoid placing the unit too close to bedrooms to prevent noise from disturbing occupants.
10. Shield from the Elements – Ensure the unit is protected from water, ice, or snow from overhangs or roofs to prevent damage or flooding.

Installation Dimensions & Clearances for Optimal Performance:

Clearance around the unit is crucial for efficient operation. Ensure the space meets these minimum dimensions:

Dimensions (Minimum)	inch	mm
1	24	610
2	8	203
3	20	508
4	24	610
5	60	1524

Note: Above diagram may be different from actual model.

 

Curb-Mounted Installation

Set the stage with the curb installation! Begin by securely installing the curb. (Note: MRCOOL doesn’t provide the roof curb—check out the figure below for detailed reference dimensions.) Before jumping into fabrication, make sure those reference dimensions are spot-on and perfectly tailored to your specific application needs!

 

Fabricate and secure the ductwork! Get hands-on by field-fabricating the ductwork inside the curb, ensuring that both the supply and return ducts are firmly secured to the roof curb and building structure.

Rig and place the unit! It’s time for the big move! Rig and carefully place the unit in position. (For details, refer to section 4.3 In the manual on Rigging & Lifting.)

Switch to vertical duct connections! Convert the unit for seamless vertical duct connections to ensure optimal airflow and efficiency.

Install the condensate drain piping! Ensure smooth operation by installing the condensate drain piping with precision and care.

Make electrical connections! Finally, power up the system by completing all necessary electrical connections and bring your setup to life!

Each step is a vital piece of the puzzle—let's get this installation done right and set for success!

 

Pad-Mounted Installation

Prepare the pad and supports! Lay the foundation for success by prepping the pad and securing the unit supports to ensure everything is set for a solid installation.

Rig and place the unit! Time to move the heavy equipment! Rig and carefully place the unit into position. (Check out section 4.3 for Rigging & Lifting details.)

Convert to horizontal duct connections! Switch things up by converting the unit to a horizontal duct connection, optimizing airflow for maximum performance.

Fabricate ductwork with precision! Take charge by field-fabricating the ductwork at the unit’s duct openings for a perfect fit.

Install condensate drain piping! Set up the condensate drain piping with care to ensure smooth, efficient operation without a hitch.

Make electrical connections! Finish strong by completing all electrical connections and powering up the system to bring it to life!

With each step, you’re building a powerful, reliable setup that’s ready to perform!

 

Rigging & Lifting

Before you dive in, keep the unit's package materials intact until installation begins! Ensure the unit remains upright at all times—no drops allowed. Get ready to lift by securely attaching chain or cable slings to the lifting holes in the base rails.

Position the unit with precision! Carefully place it on the roof curb, making sure to maintain a 1/4 inch (6.4mm) clearance between the roof curb and the base rail for that perfect fit.

Once the unit is perfectly positioned, it’s time to remove the rigging skids and package materials, making way for the next steps of your smooth and successful installation!

Safety and precision are key—let’s lift and place this unit like a pro!

 

 

NOTICE:

• Use spreader bars! To ensure the rigging straps don’t damage the unit, spreader bars are a must for added protection and smooth handling.

• Keep all panels in place! Ensure that all panels are securely in place before rigging to guarantee stability during the lift.

• Watch the height! Maintain a safe and optimal height between the top of the unit and the rigging cables’ connection point—36-54 inches (914-1371mm)—for a smooth, controlled lift.

Horizontal Duct and Vertical Duct Conversion

• For a Horizontal Duct Conversion: Simply remove the screws from the side duct opening covers (refer to Figure 4.4 for clarity) and take off the covers—you're almost there!

• For a Vertical Duct Conversion: Remove the screws from the base pan duct opening covers (check out Figure 4.5 for a quick reference) and take off the covers to make the switch!

For further installation guidance