Units With Hydronic Coil Connec- Tions Only; Piping - Trane UniTrane Installation Operation & Maintenance

Units with
Hydronic Coil
Connections Only
Piping Considerations
UNT-IOM-6

Piping

Before installing field piping to the coil, consider the following .
• All coil connections are 5/8 inch O.D. (or 1/2 inch nominal) female
copper connections.
• The supply and return piping should not interfere with the auxiliary
drain pan or condensate line. See "Connecting the Condensate
Drain" section on page 25 for more detailed information.
• The installer must provide adequate piping system filtration and
water treatment.
• Condensate may be an issue (fan-coils only) if field piping does not
have a control valve.
Refer to Figure 6 for supply and return header locations.
!
CAUTION: When using a field supplied piping
package in a fan-coil unit, allow sufficient room to install
the auxiliary drain pan. In addition, piping package must
not extend over edges of auxiliary drain pan.
2-Pipe
4-Pipe (C)
R
S
R
4-Pipe (H)
S
Air flow
Left end view of coil
Figure 6. Supply and return header locations on the hydronic
coil.
Connecting field piping to coil:
Slide a 1/2 inch sweat connection coupling (installer provided) onto
the coil headers.
2. Remove the auxiliary drain pan, if it is in place, to prevent exposure
to dripping solder or excessive temperatures.
2-Pipe
4-Pipe (C)
R
S
R
4-Pipe (H)
S
Air flow
Right end view of coil
21