Carrier 42C,V Manual de instalación descargar pdf (Pagina 66)

Step 3 — Make Electrical Connections —

Refer

to unit nameplate for required supply voltage, fan and heater

amperage and required circuit ampacity. Refer to unit wir-

ing diagram for unit and field wiring. See Fig. 77-79. Since

each project is different and each unit on a project may be

different, the installer must be familiar with the wiring dia-

gram and nameplate on the unit before beginning any wir-

ing. Make sure all electrical connections are in accordance

with unit wiring diagram and all applicable codes. The type

and sizing of all wiring and other electrical components

such as circuit breakers, disconnect switches, etc. should be

determined by the individual job requirements, and should

not be based on the size and/or type of connection provided

on the equipment. All installations should be made in com-

pliance with all governing codes and ordinances. Compli-

ance with all codes is the responsibility of the installing

contractor.

The fan motor(s) should never be controlled by any wiring

or device other than the factory-supplied switch or thermostat/

switch combination unless prior factory authorization is

obtained. Fan motor(s) may be temporarily wired for use

during construction only with prior factory approval and only

in strict accordance with the instructions issued at that time.

On 42S vertical stack units, the unit electrical supply is de-

signed to enter through knockouts provided in the top of the

unit and pass down through matching knockouts in the control

section top. Where space allows, power may be pulled directly

through the side of the cabinet into the control section.

All components furnished for field installation by either the

factory or the controls contractor should be located and

checked for proper function and compatibility. All internal

components should be checked for shipping damage, and any

loose connections should be tightened to minimize problems

during start-up.

Any devices such as fan switches or thermostats that have

been furnished from the factory for field installation must be

wired in strict accordance with the wiring diagram that appears

on the unit. Failure to do so could result in personal injury or

damage to components, and will void all manufacturer's

warranties.

Units with factory-supplied and factory-installed aquastats

may be shipped with the aquastats mounted on a coil stub-out.

If this is the case, remove the aquastat before installing valve

package. When reinstalling aquastats, consult the factory-

piping diagram in the submittal for proper location. If the valve

package is field-supplied, the aquastat must be installed in a

location where it will sense the water temperature regardless of

the control valve position. A bleed bypass may be required to

guarantee proper aquastat operation. The aquastat bypass line

allows a small amount of water to flow from the supply to the

return piping when the control valve is closed.

FACTORY-INSTALLED OPTIONS

Condensate Overflow Switch

— The condensate overflow

switch is used to detect a clogged condensate drain pan. The

condensate switch uses a normally closed contact to allow the

system control power to pass through the switch energizing the

water valves and fans allowing normal operation. When an

overflow condition is detected by the switch, it opens the NC

contact and de-energizes the water valve and fans.

Field

Tubing

Wet Rag

Torch

Supply

Return

Adaptor

(Factory Installed)

Stub

From Coil

Fig. 76 — Field Piping Connections

Fig. 77 — High Voltage Wiring Service Switch

(Side Location)

Option 1

Incoming Power

Option 2

Incoming Power

Fig. 78 — High Voltage Power Connection

(Unit Without Service Switch)

Option 3

Incoming Power

Fig. 79 — High Voltage Wiring Service Switch

(Bottom Location)

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 87 88

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Carrier 42C,V Manual de instalación Pagina 66

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