Trane WPHF manual Unit Installation WPVJ, Water Connection

Installation

Unit Installation; WPVJ

Duct collars are provided for the WPVJ equipment. The duct system and dif- fusers should be sized inaccordance with ASHRAE or ACCA Manual D.

1Install a flexible connector (field provided) for supply/return air duct connections on all metal duct sys- tems.

Note: If the unit is connected to ex- isting ductwork, an initial check of the mechanical system should be made to insure the duct has the ca- pacity to handle the air required for the unit application. If ducting is too small, as in the replacement of heat- ing only systems, larger ductwork should be installed. All existing ductwork should be checked for leaks, and repairs should be made.

2Insulate the field ductwork with a minimum of 1" duct insulation. Note: Installing the unit to an unin- sulated ductwork in an uncondi- tioned space may adversely affect the unit’s performance, as well as in- crease noise emissions into the space.

3Install proper condensate trapping to the equipment. The unit drain connection is 3/4" (19mm). When de- signing the condensate trap, it is im- portant to consider the unit’s draw- thru design requiring negative pres- sure trapping.

In a properly trapping system, when condensate forms during normal operation, the water level in the trap rises until there is a constant flow (Figure 3). It is imperative to main- tain water in the trap and not allow the trap to dry out during heating season. Keeping the trap primed at all times will enable the water to flow properly.

Condensate piping must be installed to allow the cleanable condensate

pan to be removed for cleaning. Minimum clearances for drain pan removal are 22" (sizes 018 and 024), 25" (sizes 030 and 042), and 27" (siz- es 048 through 072).

4Flush System. See page 17 for sys- tem flushing.

Water Connection

For vibration isolation, it is recom- mended that flexible steel braided hoses be installed instead of hard pip- ing between the supply/return risers and the equipment.

Trane offers 4-types of hose kit varia- tions:

•Stainless steel braided flexible hose with manual shut-off (ball) valves

•Stainless steel braided flexible hose with manual deluxe shut-off (ball) valves

•Stainless steel braided flexible hose with manual circuit-setter valve

•Stainless steel braided flexible hose with automatic balancing valve

Additional accessories, such as a strainer are recommended for use to eliminate contaminants from entering the co-axial water-to-refrigerant heat exchangers.

Figure 3: Negative pressure trap

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