Active chilled beam quarterly maintenance checklist

Occupants told and furniture below the beam protected

Occupants or site contact told before the face drops, desks, equipment and floor below covered with drop cloths, ceiling grid and face panel handled without damage.

Beam control power isolated and tagged before the face drops

Actuator and controller power isolated and tagged under the site's procedure; released with hands and tools clear for stroke and sensor checks, then isolated again.

Perforated face and induction path vacuumed

Room-side perforated face and the induction gap to the coil vacuumed, coil face brushed lightly along the fins, lint bagged, dust kept off the covered furniture.

Coil clean and control valve stroking correctly

Coil face and fins clean, no lint mat, control valve modulating and seating fully, no weeping at connections.

Supply water temperature held above room dewpoint

Chilled-water supply reset above the space dewpoint, no condensation on the coil, casing or connecting pipe insulation.

Coil hoses or pipe connections unstrained and insulated

Flexible hoses or hard pipe to the coil not kinked, stretched or chafing, insulation and vapor seal closed up to the coil stubs, no bare cold metal left to sweat.

Induction nozzles clear and primary air proven

Nozzles free of dust and lint, primary air plenum pressurized and delivering conditioned, dehumidified air, no whistling or blockage.

Primary air plenum pressure read against the balancing report

Plenum static read at the beam's test port with a manometer and matched to the balancing report for this beam, a low or high reading traced to the duct or damper.

Induced airflow seen leaving the discharge slots

Smoke pencil or tissue at the slots shows air thrown along the ceiling on each side, no dumping onto desks and no dead slot where a nozzle or coil section is blocked.

Nozzle setting matched to the schedule on adjustable beams

Where the beam has adjustable nozzles or a flow selector, the setting read and matched to the beam schedule or balancing report, any change recorded.

No condensation and dewpoint/leak controls responding

Beam, casing and ceiling dry, condensation or dewpoint sensor and any leak detector active, valve closing on a dewpoint alarm.

Room dewpoint worked out by hand and compared with the BAS

Handheld temperature and humidity read in the room, dewpoint worked out and compared with the BAS dewpoint used for this zone, from a room sensor or the air handler.

Heating and cooling valves never open together on four-pipe beams

On beams with a separate heating coil, the BAS and valve indicators show one valve shut while the other opens, no simultaneous heating and cooling at changeover.

Face panel closed, latched and seated flush in the grid

Control power isolated again before hands go back in, hinged face swung up and latched or drop-out face re-hung on its retaining cables, seated flush, drop cloths lifted.

Tag removed, beam released to auto and findings logged

Tag removed by whoever hung it, beam back under BAS control and cooling, plenum pressure, dewpoint reading and any condensation logged against the beam tag and room.