Standard Wiring Packages; Manual Fan Control; 2-Pipe Systems - Carrier 42 SERIES Application Data

STANDARD WIRING PACKAGES

IMPORTANT: Wiring diagrams shown depict typical
control functions. Refer to unit wiring label for spe-
cific functions.
Manual Fan Control —
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 field mounting and wiring.
For NOTES, see below.
Thermostatic Fan Control, 2-Pipe Systems —
The thermostat cycles the fan on and off from any selected
speed setting to maintain selected room temperature. Con-
trols can be wired for heating-only, cooling-only or for heating/
cooling by the addition of an automatic changeover device
that senses water temperature and changes the action of the
thermostat as required.
For control package descriptions, see control components
sections entitled Remote-Mounted Controls and Unit-
Mounted Controls, pages 10-13.
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.
On all Vertical Cabinet units,
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 specified, 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).
UNIT
LOCATION
TYPE
Vertical Unit Mounted
Vertical
or Wall Mounted
Horizontal
*Packages listed on current price pages. First 2 digits are item
numbers.
†For alternate thermostat with manual changeover. Refer to current
price pages.
4
THERMOSTAT OR
WIRING PACKAGE*
Heating or Heating and Cooling
Cooling Only Plus Changeover†
N/A N/A
22-C, 22-D
22-A, 22-B
22-E, 22-F