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42 SCXG-SVX01B-EN
Pre-Startup
Requirements
Installation
Figure I-PR-5. Installing the waterside economizer.
Waterside Economizer
Installation Procedure
1. Loosen and pull all end devices that
go through the bushing or the filter
rack (upper right corner of rack).
2. Remove the filter rack from the back
of the unit by removing the
1
/
4
” hex
head screws from the top and bottom
of the filter rack assembly. The filter
rack assembly will hang on the unit
when the screws are removed.
Remove the filter rack by lifting it up
off the unit.
3. Remove the economizer from the
crate and position it behind the unit
with the headers on the left side,
when facing the back of the unit.
Remove the plastic envelope that is
taped to the economizer box
assembly. This envelope contains the
gasket that must be installed onto the
vertical side flanges of the box.
4. Install the pressure sensitive gasket to
the unit side of the vertical flange on
the economizer box.
5. Hang the economizer on the unit as
shown in Figure I-PR-5. Lift the
economizer by using the holes
provided in the top panel of the
economizer.
6. Align economizer holes with the holes
in the unit channel. Install screws in the
top (6x) and bottom (6x) of the
economizer.
7. Remove the unit’s rear middle panel
and unbraze the two copper pipes in
the 2
5
/
8
” water pipe. Do not remove
the pipe outlet blockoff panel.
8. Remove the economizer tubing
assemblies from the shipping box.
Check ship-separate parts against
those shown in Figures I-PR-6, I-PR-7, I-
PR-8, and I-PR-9. Face the front of the
unit to see which side the water pipe
exits to determine if the unit has either
right or left-hand piping.
9. Assemble tubing as shown in Figure I-
PR-6 or I-PR-9. Tack all tubes in place
before brazing to ensure proper fit-up.
For right-hand piped units, install the
ball valve actuator assembly and
actuator. Refer to the unit wiring
diagram for wiring connection points.
10. Install the pipe insulation on all pipe
line to prevent sweating. Install the
rear middle panels. Re-install the filter
rack on the back of the economizer coil
box and affix with screws provided.