Trane 1500 CFM, 750 CFM manual Piping Installation, Installation Crossover Piping, unit

Installation

Piping Installation

Before installation of piping package, the shipping bracket holding the pip- ing in place, must be removed.

Proper installation of piping is neces- sary to provide efficient coil operation and to prevent damage during opera- tion. Follow standard piping practices and include all accessories as neces- sary.

Piping connection knockouts are shown pages 8 to 10. Field connection types and sizes for unit coils are listed in Table 5. These sizes are provided for field piping connection.

A7/8’’ OD condensate drain connec- tion is provided on the chilled water supply end of the unit.

1Attach a flexible condensate drain hose over the drain pan connec- tion and secure with a hose clamp.

The drain pan on the vertical is vacu- um molded with a drain connection and P-Trap on the cooling coil, connec- tion side.

Note: Condensate removal to the main system should be made through the bottom of the unit ventilator. If other location for condensate removal is de- sired, a specific field cut-out for the connection should be made in the back of the unit ventilator. To help avoid cold air infiltration, the field cut-out should only be large enough to allow for the condensate hose to exit the

7After the condensate drain piping has been completed, check water flow to ensure the system proper- ly carries and away all condensate accumulation.

Note: A P-trap is factory supplied in ev- ery vertical unit ventilator.

Trane Piping Packages (Option) Trane Standard Piping Package in- cludes a 2-way or 3-way valve with by- pass balance valve, ball valves, Pete’s plugs and unions. A strainer and cir- cuit balancing valve are optional.

1All union connections should be tightened in the field. Units are shipped with union connections hand tightened only in the factory.

Note: All connections made in the field should be sweat connections.

Piping packages are not shipped insu- lated. Any insulation should be provid- ed in the field by the installing contractor.

The auxiliary drain pan (optional) is the main condensate connection to the unit when specified. The chilled water or DX coil drain pan will empty into the auxiliary drain pan if a factory installed, auxiliary pan is ordered. All field piping condensate connections should be made at the auxiliary drain pan.

Table 7: Coil data for field piping

Installation Crossover Piping

Crossover piping is available for all hy- dronic coils. It is either 1 3/8’’ \[34.9\] or 2 1/8’’ \[54\] in diameter (O.D.) as spec- ified by the customer. Crossover pip- ing can be found in either the left or right hand end pocket. See crossover submittal drawings page 13 for dimen- sional data.

On 4-pipe coils, crossover piping con- nects to the main cooling coil.

Factory insulation is provided on all crossover piping.

When a Trane piping package is or- dered, it is installed with the connec- tions made to the supply and return of both the coil and the crossover piping. However, supply and return connec- tions must be made in the field when a piping package is furnished by the in- staller.

The crossover piping is located at the back of the unit along the wall and the ends of the piping are flush with the end of the unit.

Expansion compensation between the piping package and the crossover pip- ing is achieved using flex hoses rated at 250 psi working pressure. Expan- sion compensation for the crossover piping must be handled external to the unit ventilator.

unit.

To field reverse the slope of a vertical unit drain pan.

2Slide out fan deck (disconnecting the condensate line and fan plug will release fan deck for sliding).

3Remove pipe clamp that hold the p-trap to the drain pan.

4Remove clips that hold the drain pan in-place.

5Lift and rotate the drain pan.

6Reconnect p-trap to the drain pan and replace clips to secure the pan to the fan deck.

Coil Type	Connection Location	Field Connection Size
4-Pipe Chilled Water/Hot Water	Left or Right (opposite ends)	7/8" OD/5/8" OD
2-Pipe Changeover Coil	Left or Right	7/8" OD
Hot Water Only	Left or Right	7/8" OD
Steam	Left or Right	1" MPT
Chilled Water/Electric Heat	Left Cooling	7/8" OD
Chilled Water/Steam	Left or Right	7/8" OD/1" MPT
DX	Left	7/8" Suction, 3/8" Discharge
DX/Hot Water	Left Cooling/Right Heating	7/8" Suction, 3/8" Discharge/5/8" OD
DX/Steam	Left Cooling/Right Heating	7/8" Suction, 3/8" Discharge/1" MPT
DX/Electric Heat	Left Cooling/Right Heating	7/8" Suction, 3/8" Discharge/NA
Electric Heat	Right	NA

Notes:

1.Supply and return connections are located on the same end of each coil.

2.All Trane piping packages have union connections; all units with piping packages by others have sweat connections.

3.Coil connections are sweat except steam coils, which are threaded.

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