Carrier 42C,V Manual de instalación descargar pdf (Pagina 57)

BALL VALVE

(2) BALL

(1) 2-WAY MOTORIZED

COIL

BALL VALVE (WITH

MEMORY STOP)

BALL VALVE

(2) BALL (ONE WITH

MEMORY STOP)

(1) 2-WAY MOTORIZED

COIL

MOTORIZED

2-WAY VALVE

MOTORIZED

2-WAY VALVE

Fig. 69 — Two-Way Motorized Control Valve Package

The 2-way motorized valve motor drives valve open and a

spring returns valve to normally closed position (no water

flow with unit OFF).

Supply connection at coil will be swage fit for field braze

(standard) or union (option). Return connection at coil will

be factory brazed if isolation valve only. Addition of any

other component will require swage fit for field braze or

optional union connection.

Check job specifications for system pressure, pressure drop

imitations and flow rate prior to selecting valve package

components or valve package size (

in.,

in., etc.).

2-PIPE SYSTEM (One Valve Package) or 4-PIPE SYSTEM

(Two Valve Packages) Application:

• 2 Pipe — Hydronic Heating Only

• 2 Pipe — Hydronic Cooling Only

• 2 Pipe — Hydronic Cooling with Total Electric Heat

• 4 Pipe — Hydronic Cooling and Heating

LEGEND

NOTE: A

-in. bypass line is included in the piping package

when a 2-way valve is specified with a control package contain-

ing an automatic changeover device.

Ball Valve

Motorized 2-Way Valve

MOTORIZED

a42-4174

a42-4308

BALL VALVE

GATE

SHUT OFF

(1) GATE

(1) BALL

(1) 2-WAY MOTORIZED

COIL

BALL VALVE

(2) BALL

(1) BALANCING

(1) 2-WAY MOTORIZED

COIL

CIRCUIT SETTER

BALL VALVE

(1) BALL

(1) CIRCUIT SETTER

(1) 2-WAY MOTORIZED

COIL

MOTORIZED

2-WAY VALVE

BYPASS

BALANCING

VALVE

MOTORIZED

2-WAY VALVE

BYPASS

MOTORIZED

2-WAY VALVE

BYPASS

Fig. 70 — Two-Way Motorized Control Valve Package with Aquastat Bleed Bypass Line

The 2-way motorized valve motor drives valve open and a

spring returns valve to normally closed position (no water

flow through coil with unit OFF).

The aquastat bleed bypass bleeds a small amount of water

from supply to return when control valve is closed (required

for system water temperature sensing by aquastat).

Aquastat (A) clips on supply line upstream from aquastat

bleed bypass (as shown at right). It senses system water

temperature to prevent cooling operation with hot water in

system piping or heating operation with chilled water in

system piping. Additional aquastat is required to lock out

the optional auxiliary electric heat when hot water is in the

system.

Supply and return connections at coil will be swage fit for

field braze (standard) or unions (option).

Check job specifications for system pressure, pressure drop

limitations and flow rate prior to selecting valve package

components or valve package size (

in.,

in., etc.).

2-PIPE SYSTEM (One Valve Package) Application:

• 2 Pipe — Hydronic Cooling and Heating

• 2 Pipe — Hydronic Cooling and Heating with Auxiliary

Electric Heat

LEGEND

NOTE: Additional aquastat required as noted above.

Balancing Valve

Ball Valve

Circuit Setter

Gate Shut Off Valve

Motorized 2-Way Valve

MOTORIZED

a42-4175

1 2 ... 52 53 54 55 56 57 58 59 60 61 62 ... 87 88

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Carrier 42C,V Manual de instalación Pagina 57

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