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Coil – Carrier 42V User Manual

Page 47

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47

CIRCUIT SETTER

(1) BALL
(1) CIRCUIT SETTER
(1) 3-WAY MOTORIZED

COIL

BALL VALVE

GATE

SHUT OFF VALVE

(1) GATE
(1) BALL
(1) 3-WAY MOTORIZED

R

S

COIL

BALL VALVE

BALL VALVE

(2) BALL
(1) BALANCING
(1) 3-WAY MOTORIZED

R

S

COIL

MOTORIZED

3-WAY VALVE

BYPASS

BALANCING
VALVE

MOTORIZED

3-WAY VALVE

BYPASS

(1) BALL
(1) 3-WAY MOTORIZED

R

S

COIL

BALANCING
VALVE

BALL VALVE

BALL VALVE

(WITH MEMORY STOP)

MOTORIZED

3-WAY VALVE

BYPASS

(2) BALL (ONE WITH
MEMORY STOP)
(1) 3-WAY MOTORIZED

R

S

COIL

BALL VALVE

BALL VALVE

MOTORIZED

3-WAY VALVE

BYPASS

R

S

COIL

BALL VALVE

MOTORIZED

3-WAY VALVE

BYPASS

M

M

M

M

M

M

Fig. 46 — Three-Way Motorized Control Valve Package

On the 3-way motorized valve flow is normally closed to coil
and open to system return. Motor closes bypass flow to sys-
tem return while opening flow through coil. Water bypasses
coil and flows directly to system return when unit is OFF.
The aquastat (A) clips on supply line upstream from 3-way
valve (as shown above). It senses system water tempera-
ture to prevent cooling operation with hot water in system
piping or heating operation with chilled water in system pip-
ing. Aquastat(s) required for 2-pipe cooling and heating with
automatic changeover control and/or auxiliary electric heat.
A bypass balancing valve may be specified in the bypass
line to permit equal flow balancing.
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 (

1

/

2

in.,

3

/

4

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
• 2 Pipe — Hydronic Cooling and Heating
• 2 Pipe — Hydronic Cooling and Heating with Auxiliary

Electric Heat

• 4 Pipe — Hydronic Cooling and Heating

LEGEND

*When aquastat is used for automatic changeover, bypass is

required as indicated by dashed line.

NOTES:

1. Packages factory furnished and installed.
2. Valves are

5

/

8

-in. ODS unless otherwise specified.

3. If an automatic flow control valve is added, it will be

located on supply line between shutoff valve and coil (or
motorized control valve, if supplied).

Balancing Valve

Ball Valve

Ball Valve with Memory Stop

Circuit Setter

Gate Shut Off Valve

Motorized 3-Way Valve

M

MOTORIZED

MOTORIZED

M

a42-4176

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