Carrier 42 SERIES Standard Wiring Packages, Thermostatic Fan Control, 2-PipeSystems Ð

STANDARD WIRING PACKAGES

IMPORTANT: Wiring diagrams shown depict typical control functions. Refer to unit wiring label for spe- ci®c functions.

Manual Fan Control Ð On all Vertical Cabinet units, the standard fan-speed switch is furnished unit-mounted and wired. On all Vertical Furred-In units and all Horizontal units, the switch is shipped separately on a decorative wall plate for ®eld mounting and wiring.

The standard switch has LOW, MEDIUM, HIGH and OFF positions plus an auxilliary contact to energize thermostats, valves, dampers, etc.

NOTE: Wiring diagrams are for 120-v power supply. If other voltages for heaters or controls are speci®ed, wiring may dif- fer from that shown.

The standard 3-speed switches are illustrated on page 12 (unit mounted) and on page 10 (wall mounted).

For NOTES, see below.

Thermostatic Fan Control, 2-Pipe Systems Ð	UNIT				THERMOSTAT OR
The thermostat cycles the fan on and off from any selected			LOCATION		WIRING PACKAGE*
	TYPE				Heating or	Heating and Cooling
speed setting to maintain selected room temperature. Con-
				Cooling Only		Plus Changeover²
trols can be wired for heating-only, cooling-only or for heating/
	Vertical		Unit Mounted		N/A	N/A
cooling by the addition of an automatic changeover device
	Vertical
that senses water temperature and changes the action of the					22-C, 22-D
	or		Wall Mounted			22-A, 22-B
thermostat as required.					22-E, 22-F
	Horizontal
For control package descriptions, see control components
	*Packages	listed on current			price pages. First 2 digits are item
sections entitled Remote-Mounted Controls and Unit-	numbers.
Mounted Controls, pages 10-13.	²For alternate thermostat with manual changeover. Refer to current
	price pages.

NOTES:

1.Motors are thermally protected.

2.Use copper conductors only.

3.See unit nameplate for power supply. Provide disconnect means and overload protection as required.

4.Unit-mounted thermostats are not recommended for fan control because of poor temperature sensing. Fan control not available on 42VC,VE Loboy units.

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