TECHNICAL SERVICES

HVAC START-UP SERVICES

Get the most out of your energy and HVAC budget with start-up services from MIH. Your initial investment in new HVAC equipment represents only 5%–10% of its lifecycle cost. Over time, the cost of operation—particularly what you’ll spend on energy—might add up to 10 to 20 times more than what you originally spent for the equipment. That’s why it’s crucial to get your system operating at peak performance during its baseline operational period. The right services—conducted by knowledgeable, factory trained and authorized technicians—can mean the difference between an efficiently operating system and one that wastes energy and money over the short and long terms.

Start-Up Services Include:

  • Factory Engineer Support

  • Manufacturer Start-Up Execution & Documentation

  • Owner Training and Familiarization

  • Seasonal Shutdowns and Change-Overs

  • Point to Point BMS Testing

HVAC SERVICE &

PREVENTIVE MAINTENANCE

Our service team is certified/recognized by the listed manufacturers as being skillfully accomplished at troubleshooting problems and maintaining your HVAC system to optimize ultimate efficiency.

Highly Developed Preventive Maintenance Programs
We will do a comprehensive site analysis and customize a preventive maintenance program designed completely around your unique HVAC System.   This program will keep your system running at peak performance.  Some of the benefits include:

  • Savings: Maintenance agreements typically more than pay for themselves through higher efficiency and lower energy consumption. 

  • Peace of Mind: Preventive maintenance will mean fewer system failures and a longer life for your HVAC equipment.

  • Priority Service: Should a system failure occur during the heat of the summer or the cold of the winter, customers with Preventive Maintenance Agreements receive priority service.

  • Continuity:  Designated technicians who are familiar with you and your equipment will be assigned to your maintenance.​

​Maintenance Programs Include (but are not limited to):

  • Commercial Building HVAC

  • Natatorium Dehumidification Systems

  • Chilled Water Systems

  • Condenser Water Systems

  • Cooling Towers

  • Plate & Frame / Shell & Tube Exchangers

  • Rooftop Units

  • Exhaust Fans

  • A/C Units

  • Heat Pumps

  • AHU's  

  • Residential Units

VFD SERVICE & MAINTENANCE

Variable Frequency Drives are often installed in harsh environments and need regular maintenance to ensure longevity and reliability for the critical equipment they serve. MIH has dedicated VFD technicians capable of maintaining and troubleshooting all manufacturers' drives. A VFD requires the same safety and equipment precautions applied to computers and power supplies because of its similarity to both: Keep it clean; keep it dry; and keep the connections tight.

Maintaining VFDs is easier than you might think, but it's something you shouldn't take for granted. By integrating some simple, logical steps into your preventive maintenance (PM) program, you can ensure your drives provide years of trouble-free service.

 

KEEP IT CLEAN - Dust on an electronic device can cause malfunction or even failure by absorbing moisture. Discharging compressed air into the VFD is a viable option in some environments, but typical plant air contains oil and water. Oil-free, dry air requires a specialized, dedicated, and expensive air supply — and you still run the risk of generating static charges. A nonstatic generating spray or a reverse-operated ESD vacuum will reduce static buildup. Common plastics are prime generators of static electricity. The material in ESD vacuum cases and fans is a special, nonstatic generating plastic.

 

KEEP IT DRY -  VFDs seldom offer condensation protection today. If you operate the VFD all day, every day, the normal radiant heat from the heat sink should prevent condensation. Unless the unit is in continuous operation, use a NEMA 12 enclosure and a thermostatically controlled space heater if you place it where condensation is likely.

 

KEEP CONNECTIONS TIGHT -This may seem obvious, but checking connections is a step many people miss or do incorrectly — and the requirement applies even in clean rooms. Heat cycles, mechanical vibration, and standard PM practices can lead to substandard connections. Also, re-torquing screws and excessive tightening can ruin connections. Bad connections eventually lead to arcing. Arcing at the VFD input could result in nuisance over-voltage faults, clearing of input fuses, or damage to protective components. Arcing at the VFD output could result in over-current faults, or even damage to the power components.Loose control wiring connections can cause erratic operation. For example, a loose speed reference wire can cause the drive speed to fluctuate, resulting in scrap, machine damage, or injury.