Trane GEV, GEH manual Cabinet to the unit compressor compartment center post

Installation Waterside Economizer

WARNING

Hazardous

Voltage!

Disconnect all electric power, in- cluding remote disconnects be- fore servicing. Follow proper lockout/tagout procedures to en- sure the power can not be inad- vertently energized. Failure to disconnect power before servic- ing could result in death or seri- ous injury.

The following steps were sequenced to aid in the installation and mating of a waterside economizer to a water- source heat pump (GEV and GEH 6 through 25 ton models).

1Remove the filter frame from the unit.

2Remove the waterside service panel from the unit.

3Remove the control box service panel from the unit.

4Remove the economizer and mis- cellaneous mounting parts from it’s packaging.

5GEV ONLY: Mount the economiz- er support angle (4475 1637 0100) found in the economizer packag- ing in the same holes of the re- turn air filter frame removed in step 1. The support angle screws into the unit roof.

6GEV ONLY: Hang the economizer assembly from the economizer support angle mounted in step 5.

7Secure the economizer to the unit using the four plates (4475 1630 0100) found in the economizer packaging. Two plates should be applied to each economizer side. GEV ONLY: Secure the bracket on the bottom of the economizer

cabinet to the unit compressor compartment center post.

8Install the field portion of the wa- ter piping and the 3-way valve to- gether.

9 VERIFY

The control board for the water- side economizer is located at the back of the control box. The tem- perature rating of this board is factory set to 55ºF.

10Thread the economizer’s enter- ing water temperature sensor (4RT1) through the water-in line of the water-source heat pump. This sensor is used by the econo- mizer’s 3-way valve to determine if water flow should be directed through the waterside economiz- ing coil.

11Tie wrap the thermistor to the water line (supply side) upstream of the water pipe to the econo- mizer. The thermistor must be sit- uated so that the thermistor is capable of reading the actual en- tering water temperature regard- less of the economizer’s on or off situation.

12Insulate the thermistor with tub- ing insulation.

13Tie wrap each end of the tubing insulation to prevent air filtration. The tie wraps and insulation are located in a baggie and shipped inside of the unit.

14Thread the factory wire harness through the low voltage hole of the heat pump to the 3-way valve’s wire harness.

15Connect the factory installed wire harness to the to the wire harness supplied with the 3-way valve.

Actuator Wire #		Factory Harness Wire #
Color		Color
1 BLK	=	25L-Black
2 WHT	=	23T-White
3 WHT	=	73A-White

16Bundle excess valve wire, and wire tie the bundle neatly.

17Install control side service panel to the heat pump.

18Install the unit filter frame to the economizing inlet.

19Insulate the economizing piping package with field supplied pipe insulation. Insulating the piping will help stop condensation from forming on the pipe.

Note: Trane does not provide insulation on the economizing piping package. This insulation must be field provided and field installed.

20Install waterside service panel to the heat pump.

21Field pipe the drain lines of the waterside economizer and water- source heat pump together prior to installing a condensate trap.

See page 51 for proper trapping of condensation. The economizer condensate line must be trapped prior to the unit’s drain line. This helps prevent air from being sucked through the drain line causing condensate to spit or build-up in the economizer or unit drain pans.

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