Data Aire DAFC-11 Manual de instalación descargar pdf (Pagina 14)

NOTE: Models DAFC-57 and larger are double-wide units. Although the header con-

nection for each section is 2-5/8” O.D., each unit comes with a factory provided manifold

kit with 3-1/8” O.D. ﬁ eld connections.

2.3 Auxiliary Chilled Water Coil Piping

Units with optional auxiliary chilled water cooling coil require a separate source of chilled water. The

chilled water connection sizes will be the same as those listed for the condenser water (see Sec-

tion 2.2.3). Units with optional Energy Saver coil typically have shared or common piping with the

condenser supply and therefore do not require a separate cooling source.

All water pipes have a cap installed on the end of the pipe for pressure testing the system. These

caps need to be removed before installing the piping to the units. Use a tube cutter for smaller pipes

and a reciprocating saw with a metal cutting blade for larger pipe sizes or if there is a clearance

problem. All connections need to be cleaned before connections are brazed together.

2.4 Condensate Drain Piping

Every indoor evaporator section is provided with a 3/4” copper stub for condensate removal. A

union is recommended at the ﬁ eld connection which will permit easy disconnection from the unit for

cleaning.

A trap should be built into the drain line to prevent air from backing up into the unit. Drain lines

should be pitched downward not less than 1/4” for each ten feet of horizontal run. Do not reduce

the size of the drain line.

Some applications have no convenient means of allowing a gravity drain. In this case, a conden-

sate pump can be used. Condensate pumps are either factory mounted and wired or shipped loose.

Factory mounted condensate pumps do not require a separate power source.

Condensate pumps shipped loose (or ﬁ eld provided) typically require a dedicated 110 volt power

source. Field pipe connections must be made to the pump discharge connection. A check valve

must be installed to prevent short cycling. (Also see condensate pump electrical requirements in

Section 3.9)

2.5 Humidiﬁ er Piping

2.5.1 Steam Generator Humidiﬁ er

The standard humidiﬁ er on Data Temp and Modular Data Temp systems is a steam generator

type with a disposable cylinder. The humidiﬁ er make-up water should be brought to the humidiﬁ er

through the ﬁ eld connection opening using 1/4” copper tubing. A compression ﬁ tting is provided at

the humidiﬁ er.

A shut-off valve should be provided outside the air conditioner to allow disconnection for service.

An in-line water pressure regulator and strained should be installed. Water pressure should be set

between 30 and 80 PSI.

The humidiﬁ er has a drain at the bottom which is factory piped to the main condensate drain line.

The dispersion tube also has a drain line. No additional ﬁ eld piping is required.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 35 36

Sin comentarios

Data Aire DAFC-11 Manual de instalación Pagina 14