Maintenance
!WARNING
Hazardous Service Procedures!
The maintenance and trouble- shooting procedures recommend- ed in this section of the manual could result in exposure to electri- cal, mechanical or other potential safety hazards. Always refer to the safety warnings provided throughout this manual concern- ing these procedures. When possi- ble, disconnect all electrical power including remote discon- nects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be in- advertently energized. When nec- essary to work with live electrical components, have a qualified li- censed electrician or other indi- vidual who has been trained in handling live electrical compo- nents perform these tasks. Failure to follow all of the recommended safety warnings provided, could result in death or serious injury.
Modulating Valves
The valve should be serviced by a trained, experienced technician. For detailed installation and removal steps, refer to Pages
For general servicing or malfunction, follow one of the appropriate steps:
1If the valve is leaking, drain system OR isolate valve from the system. DO NOT remove valve body from plumbing.
2Ensure the cartridge needs to be replaced. If so, follow appropriate steps explained for cartridge as- sembly removal.
3If the motor or other internal parts of the actuator is damaged, replace the entire actuator assembly.
Note: These hydronic valves are de- signed and tested for silent operation. However, water noise may occur as a result of high water velocity. Piping noises may also occur in high temper- ature (over 212° F) systems with insuf- ficient water pressure.
Note: Do not use
Coil Cleaning
Periodically the hydronic coils should be cleaned from dirt accumulation that could reduce the unit performance. To clean the equipment coil:
1Remove the unit’s front panel.
2Remove the unit’s front nosing.
3Removed the coil’s solid steel front cover.
4Vacuum the dust/particles from the coil face.
5Reverse order for
Preventive Maintenance
Acomprehensive preventive mainte- nance program should be established for a unit ventilator system. The fol- lowing are several key elements:
•Inspect the filters monthly. Follow the Filter Replacement instruc- tions.
•Inspect and clean the drain pan every three months.
•Check the coils for ‘‘dirt’’ accumu- lation every three to six months. Clean the coils at least once each year.
•Inspect the unit ventilator insula- tion every three months; thor- oughly clean as needed.
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