Carrier 42C,V Manual de instalación descargar pdf (Pagina 64)

Table 7 — Piping Components (cont)

LEGEND

*Check all system component pressure ratings (coils, values,

pumps, etc.) with manufacturer and any applicable local or national

piping codes prior to specifying system pressure rating.

SYMBOL/SKETCH DESCRIPTION

FACTOR RATING*

STEAM

USE

PSI F

2-WAY MOTORIZED VALVE (25 PSI close off dif-

ferential pressure): Electric 2-position flow control

valve (open/closed). Normally closed body with man-

ual override lever. Installed in supply line to unit.

Application — All standard control and valve pack-

ages are based upon normally closed valves (valve

electrically powered open and closed by spring

return when electric power removed). Manual over-

ride lever allows valve to be placed in the open posi-

tion for secondary (unit) flushing, constant water flow

prior to start-up, etc. Manual override is automati-

cally disengaged when valve is electrically activated.

Consult factory for normally open valve applica-

tions.

3.5 3.5 300 200

YES

PSI

MAX.

2-WAY MOTORIZED VALVE (150 PSI close off dif-

ferential pressure): Electric 2-position flow control

valve (open/closed). Normally closed body with man-

ual override lever. Installed in supply line to unit.

Application — All standard control and valve pack-

ages are based upon normally closed valves (valve

electrically powered open and closed by spring

return when electric power removed). Manual over-

ride lever allows valve to be placed in the open posi-

tion for secondary (unit) flushing, constant water flow

prior to start-up, etc. Manual override is automati-

cally disengaged when valve is electrically activated.

Consult factory for normally open valve applica-

tions.

4.9 10.3 300 240 NO

3-WAY MOTORIZED VALVE (25 PSI close off dif-

ferential pressure): Electric 2-position flow control

valve (closed to coil/open to bypass or open to coil/

closed to bypass). Normally closed with manual

override lever. Installed in supply line to unit.

Application — Same comments as 2-way motorized

valve except with manual override lever engaged the

valve is open to both ports and water flow will take

the path of least resistance through the valve pack-

age (not necessarily 100% through the coil).

4.0 4.0 300 200 N/A

3-WAY MOTORIZED VALVE (150 PSI close off dif-

ferential pressure): Electric 2-position flow control

valve (closed to coil/open to bypass or open to coil/

closed to bypass). Normally closed with manual

override lever. Installed in supply line to unit.

Application — Same comments as 2-way motorized

valve except with manual override lever engaged the

valve is open to both ports and water flow will take

the path of least resistance through the valve pack-

age (not necessarily 100% through the coil).

4.9 4.9 300 240 N/A

— Coefficient of Velocity

DX — Direct Expansion

ETO — Engineering to Order

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 87 88

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