Trane GEVE - Sequence

WSHP-SVX01AA-EN
65
6. GEV ONLY: Hang the economizer assembly from
the economizer support angle mounted in Step 5.
7. Secure 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.
8. Install the field portion of the water piping and the
3-way valve together.
9. Verify the control board for the waterside
economizer is located inside the unit. The
temperature rating of this board is factory set to
55ºF.
10. Thread the economizer’s entering water
temperature sensor (4RT1) through the water-in
line of the water-source heat pump upstream from
the valve. This sensor is used by the economizer’s
3-way valve to determine if water flow should be
directed through the waterside economizing coil.
11. Tie wrap the thermistor to the water line (supply
side) upstream of the water pipe to the economizer.
The thermistor must be situated so that the
thermistor is capable of reading the actual entering
water temperature regardless of the economizer’s
on or off situation.
12. Insulate the thermistor with tubing insulation.
13. Tie wrap each end of the tubing insulation to
prevent air filtration. The tie wraps and insulation
are located in a bag and shipped inside of the unit.
14. Route the factory wire harness through the low
voltage hole of the heat pump to the 3-way valve’s
wire harness.
15. Connect the factory installed wire harness to the
wire harness supplied with the 3-way valve.
16. Bundle excess valve wire, and wire tie the bundle
neatly.
17. Install control side service panel to the heat pump.
18. Install the unit filter frame to the economizing inlet.
19. Insulate the economizing piping package with field
supplied pipe insulation. Insulating the piping will
help stop condensation from forming on the pipe.
NNootteess::
• Trane does not provide insulation on the
economizing piping package. This insulation
must be field provided and field installed.
• Trane does not provide condensate
overflow protection of the waterside
economizer. This must be field provided and
field installed.
20. Install waterside service panel to the heat pump.
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. Field pipe the drain lines of the waterside
economizer and water-source heat pump together prior
to installing a condensate trap. See Condensate Drain
Connection for proper trapping of condensation.
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