Carrier 42C,V Manual de instalación descargar pdf (Pagina 59)

42C,D,V DRAIN CONNECTIONS — Install drain line in

accordance with all applicable codes. A continuous pitch of

1 in. per 10 ft of condensate drain line run is necessary for

adequate condensate drainage. Insulate the drain line to

prevent sweating. Extend the drain line straight from the drain

pan before making any turns. The installer must provide proper

support for the drain line to prevent undue stress on the

auxiliary drain pan.

A drain trap may be required by local codes and is recom-

mended for odor control. The differential height inlet to outlet

must be at least 1-in. wg greater than the total static pressure of

the unit. The differential height of the outlet to the bottom of

the trap must not be less than the total static pressure of the

unit. See Fig. 73 (42D) and 74 (42V).

Provide a trap of at least 2 in. near the end of the drain line

to prevent odors from entering the rooms.

WITH HAND VALVES ONLY

BALL VALVE

(2) BALL

COIL

BALL VALVE

GATE SHUT

OFF VALVE

(1) BALL

(1) GATE

COIL

BALL VALVE

(2) BALL

(1) BALANCING

COIL

BALL VALVE

(1) BALL

(1) CIRCUIT SETTER

COIL

BALANCING

VALVE

CIRCUIT SETTER

Fig. 72 — Valve Package without Motorized Control

When isolation valves only are specified, they will be brazed

to the coil stub-outs.

Check job specifications for system pressure, pressure drop

limitations and flow rate prior to selecting specific compo-

nents or valve package size (

in.,

in., etc.).

2-PIPE SYSTEM ONLY (One Valve Package) Application:

• 2 Pipe - Hydronic Heating Only

• 2 Pipe - Hydronic Cooling Only

LEGEND

*When aquastat is used for automatic changeover, bypass is

required as indicated by dashed line.

NOTES:

1. Continuous water flow, chilled water or hot water.

2. Not recommended for high humidity applications.

3. 2-Pipe System Only: Not recommended with unit-

mounted thermostat on vertical units.

4. The addition of any other component(s) wil require

swage fitting for field braze or optional union connection.

5. Packages factory furnished and installed.

6. Valves are

-in. ODS unless otherwise specified.

7. 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

Circuit Setter

Gate Shut Off Valve

a42-4307

CONDENSATE

PAN STUB-OUT

7/8 IN. FIELD-SUPPLIED

DRAIN EXTENSION

TRAP

2 IN. MIN

Fig. 73 — Typical Drain Line Details

(42D Unit Shown)

1 2 ... 54 55 56 57 58 59 60 61 62 63 64 ... 87 88

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Carrier 42C,V Manual de instalación Pagina 59

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