Air Handler Installation

T h e Q u a l i t y L e a d e r i n C o n d i t i o n i n g A i r

NOTICE! Failure to remove shipping brackets from spring-mounted compressors will cause excessive noise, and could cause component failure due to added vibration.

The installation of water source heat pump units and all associated components, parts and accessories which make up the installation shall be in accordance with the regulations of ALL authorities having jurisdiction and MUST conform to all applicable codes. It is the responsibility of the installing contractor to determine and comply with ALL applicable codes and regulations.

Removing Existing Condensing Unit (Where Applicable)

1.Pump down condensing unit. Close the liquid line service valve of existing condensing unit and start compressor to pump refrigerant back into compressor section. Then, close suction service valve while compressor is still running to trap refrigerant in outdoor section. Immediately kill power to the condensing unit.

2.Disconnect power and low voltage and remove old condensing unit. Cut or unbraze line set from unit. Remove condensing unit.

3.If condensing unit is not operational or will not pump down, refrigerant should be recovered using appropriate equipment.

4.Replace line set, especially if upgrading system from R-22 to R-410A refrigerant. If line set cannot be replaced, it must be thoroughly flushed before installing new compressor section. R-410A compressors use POE

oil instead of mineral oil (R-22 systems). Mineral oil is not compatible with POE oil, and could cause system damage if not completely flushed from the line set.

“Indoor” Compressor Section Location

Both “indoor” and “outdoor” versions of the geothermal split system compressor section are available. “Indoor” version is not designed for outdoor installation. Locate the unit in an INDOOR area that allows enough space for service personnel to perform typical maintenance or repairs without removing unit. Units are typically installed in a mechanical room or closet. Never install units in areas subject to freezing or where humidity levels could cause cabinet condensation (such as unconditioned spaces subject to 100% outside air). Consideration should be given to access for easy removal of service access panels. Provide sufficient room to make water, electrical, and line set connections.

Any access panel screws that would be difficult to remove after the unit is installed should be removed prior to setting the unit. Refer to Figure 2 for an illustration of a typical installation. Refer to “Physical Dimensions” section for dimensional data. Conform to the following guidelines when selecting unit location:

1.Install the unit on a piece of rubber, neoprene or other mounting pad material for sound isolation. The pad should be at least 3/8” [10mm] to 1/2” [13mm] in thickness. Extend the pad beyond all four edges of the unit.

R e s i d e n t i a l S p l i t - 6 0 H z R 2 2 & R 4 1 0 A

R e v. : 5 J u n e , 2 0 0 8

Installation

2.Provide adequate clearance for maintenance and service. Do not block access panels with piping, conduit or other materials.

3.Provide access for servicing the compressor and coils without removing the unit.

4.Provide an unobstructed path to the unit within the closet or mechanical room. Space should be sufficient to allow removal of the unit, if necessary.

5.In limited side access installations, pre-removal of the control box side mounting screws will allow control box removal for future servicing (R22 units only).

6.Provide access to water valves and fittings and screwdriver access to the unit side panels and all electrical connections.

This manual specifically addresses the compressor section of the system. Air handler location and installation should be according to the instructions provided with the air handling unit.

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