Horizontal Water WH Series Source Heat Pumps Yearly Maintenance

At least once each year, a qualified service technician should check out the unit. Supply fans, evaporator coils and air filters should be inspected monthly.

WARNING ! Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a qualified installer. A copy of this IOM should be kept with the uni

DX Cooling

Condensate Drain Pans

Supply Fans

CAUTION! Blower wheels must be inspected for excessive dust build up periodically and cleaned if required. Excessive dust build up on blower wheels may cause an unbalanced state; leading to vibration and/or component failure. Damages due to excessive dust

WARNING! Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts.

Supply Fan Lubrication

Recommended greases are:

Microchannel Coil Cleaning

Allowed Chemical Cleaners and Procedures

WARNING! Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts

Simple Green

Simple Green is available from AAON Parts and Supply (Part# T10701) and is biodegradable with a neutral 6.5 pH. Recommendation is to use it at a 4 to 1 mix. Use the following procedure

Vinegar

This is standard white vinegar available in gallons from most grocery stores. It has a pH of 2-3, so it is slightly acidic. Use the following procedure.

Water Flush

This procedure can be used when the only material to cause the coil to need cleaning is debris from plant material that has impinged the coil face.

Caution! Use pressurized clean water, with pressure not to exceed 140 psi. Nozzle should be 6” and 80° to 90° from coil face. Failure to do so could result in coil damage.

Application Examples

The three procedures can be used to clean microchannel coils.

Generally the best and broadest based procedure is #1. The grease cutting effect of the Simple Green is good for restaurant applications.

Other Coil Cleaners

Filter Replacement

Monthly filter inspection is required to maintain optimum unit efficiency.

WARNING! Electric shock hazard. Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts.

See Filter Information section for reference to the correct size and quantity of filters.

Replacement Parts

Parts for AAON equipment may be obtained by contacting your local AAON representative. When ordering parts, reference the unit serial number and part number located on the external or internal nameplate of the unit.

Note: Warranty end date can be found on the unit nameplate.

Note: Before calling, technician should have model and serial number of the unit available to help answer questions regarding the unit.