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Water-to-Water System Design Guide
Part III: Source Side Design / System Selection
Drawing 3-2 – Heating only application with internal source
pump(s) – 50YEW only: Drawing 3-2 is used for 50YEW series
units with optional internal source pump(s). Three-way valves are
required for purging air from the system. It is important to note
that when headering the ground loop outside of the mechanical
room the header must be a reducing type in order to be able to
purge air from the system at the Flow Controller 3-way valves.
Reducing headers are addressed later in this section.
Drawing 3-2: 50YEW Source Piping (Internal
Source Pumps) - No Cooling or Separate Cooling
System
See drawings in section 2 for Load connections
34
IN
OUT
50YEW
Unit
Load HX
Source HX
(coaxial)
Bryant: Whatever It Takes.
To/From Ground Loop
Note 1
NOTES:
1. Ball valve arrangement is for purging air from the
ground loop.
2. P/T (pressure/temperature) ports are internal for
50YEW series units.
3. Source water piping must be insulated for closed loop
installations.
4. Other components (additional ball valves, unions, etc.)
may be required for ease of service. This drawing
shows only minimum requirements. Your specific
installation will dictate final component selections.
5. Local code supercedes any piping arrangements or
components shown on this drawing.
14Sep07
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