York CSA DH 036 Spécifications télécharger pdf (Page 75)

2-45

JOHNSON CONTROLS

FORM 102.20-N1 (1109)

Coil Piping

Do not test, clean and ush piping

through this equipment.

Isolate this equipment from pressure

testing of water, steam gas and air

piping.

Consult the job specications and submittal drawings

for specic piping requirements, coil connection sizes

and location. The unit should be level to assure proper

venting and draining of coils. The piping arrangements

must provide for a balanced ow in multiple coil

installations (see Fig. 2-66 showing factory coil

connections).

Support all connecting piping independently of the

coils. Provide swing joints or exible ttings in all

piping connections, particularly adjacent to heating

coils, to absorb expansion and contraction strains.

Rigid piping connections can cause coil damage.

The coil supply and the return pipe connections are

labeled. When attaching piping to the coil header,

make the connection only tight enough to prevent

leaks. Excessive tightening may cause damage to the

header. A backup wrench should be rmly held on the

coil connection so that in tightening the connecting

piping the torque is not transmitted to the coil header,

thus damaging the coil connection.

Application Notes - All connections are male piping

thread except DX coils, which are solder. Drain and vent

taps on water coils are pipe thread shipped with plugs

installed. These taps are installed approximately two

inches back from the end of the threaded connections.

Pipe for balanced ow and assure even

airow.

Staggered Coils

Staggered Coils in Expanded Cabinet size units will

have connections brought to the unit exterior for liquid

or steam coils. DX coils are not included.

• The external connections are either threaded pipe

or grooved pipe for the contractor to make his

connections when the media is liquid.

• The external connections are threaded pipe for the

contractor to make his connections when the media

is steam.

• The installing contractor is responsible for insulat-

ing piping extensions we provided inside the air

handler.

FIG. 2-67 – STAGGERED COIL CONFIGURATIONS

STAGGERED COIL – ANGLE WALL STAGGERED COIL – OPPOSITE

SIDE CONNECTIONS

1 2 ... 70 71 72 73 74 75 76 77 78 79 80 ... 139 140

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York CSA DH 036 Spécifications Page 75

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