Accessories Planned Maintenance

Types

Humidifiers Air Cleaners Heat Recovery Ventilators Condensate Pumps

Humidifiers

Types:• Fan-Powered• Bypass

Humidifiers

Replace media pad Clean mineral deposits from:

• Water reservoir or drain pan• Float, float valve orifice, and valve seat• Water solenoid valve orifice and strainer

Humidifiers

Check for water overflow On wheel-type humidifiers, an

approved water treatment solvent can be applied to water reservoir

AT OUTDOORTEMPERATURE

(F)

RECOMMENDEDINDOOR RH

(%)

-20 15

-10 20

0 25

10 30

20 35

30 40

Recommended Indoor Humidity Levels at Various Outdoor Temperatures

Air Cleaners

Types:• Mechanical• Electronic

Air Cleaners

Mechanical Air Filters• Change with each inspection or as

needed to provide proper airflow• Fiberglass & pleated filters should be

thrown away• Metal & foam filters can be washed &

reused

Air Cleaners

Electronic Air Cleaners:• Turn power off to unit (9,000 to 11,000

VDC supplied by cleaner’s transformer)• Remove the pre-filters and air cleaner

cells• Clean inside of cabinet• Clean pre-filters with a mild soap

solution

Air Cleaners

Electronic Air Cleaners:• Wash air cleaner cells with a solution

of 3/4 cups of standard dishwasher detergent and hot water

• Soak cells in solution for 15 to 20 minutes

• Rinse until all the solution is removed

Air Cleaners

Electronic Air Cleaners:• Inspect cells for any damage and

reinstall with pre-filters• Leave system’s blower on for 30

minutes with power off to air cleaner to dry the cells thoroughly

Heat Recovery Ventilators

A heat recovery device to temper fresh air intake to a

temperature closer to return air temperature and remove the stale

air from a home

Heat Recovery Ventilators

Filters should be changed monthly and interior blower maintained on

the same schedule as the furnace/air handler

Heat Recovery Ventilators

Drain pans and interior of unit:• Clean the foil-faced insulation surface

and wipe the drain pans with a soft cloth and a mild cleaning solution

• Make sure condensate drain line is not blocked

Heat Recovery Ventilators

Heat Recovery Cores:• Remove from unit and clean once per

year• Use warm water and a mild soap• Soak recovery core in solution for

about three hours• Allow to dry before reinstalling

Condensate Pumps

Remove pump from system Remove reservoir from pump Clean reservoir of any dirt or grime

and check float Reinstall Add water to system to check

pumping operation

Planned Maintenance on Self-Contained

Refrigeration Units

Refrigeration Units

•Record make, model and serial numbers

•Check the condition of the condenser and evaporator coils and clean if necessary

•Check and record the suction and discharge pressures

•Check the condition of any electrical connections and cords.

Refrigeration Units

•Check door hinge screws for tightness

•Check the condition of the door gasket(s)

•Check amperage draw of the compressor and compare to manufacturer’s specifications

Refrigeration Units

•Check drain line for clogs or obstructions

•Check evaporator’s airflow pattern for any obstructions or blockages

•Check and record the case temperature.

Boiler Maintenance

THE

END