Carrier 50DL - Manual (Page 6)

APPLY RTV SEALANT TO AREAS SHOWN
Fig. 5 — Economizer Outdoor Air
Inlet Hood Assembly
Fig. 6 — Enthalpy Control Assembly
Fig. 7 — Psychrometric Chart for
Enthalpy Control
^
MAIN POWER TERMINAL BLOCK IN UNIT CONTROL
BOX OR HEATER COMPARTMENT
FIELD POWER
SUPPLY
TB4 MAIN CONTROL BOX
I I
THERMOSTAT SUBBASE
NOTE Thermostat subbase required.
Fig. 8 — Field Wiring Connections
Constant Volume Units Without
Energy Management Option
2
.
weathertight space. The night setback box contains
a terminal block for field wiring connections, a
morning warmup thermostat and the setback/
setup module. The night setback box remains in
the unit. Shipping locations of remote box and
permanent location of night setback box are shown
in Fig. 11.
1. Remove remote box and mount in a restricted
access area (indoors or in a weathertight space).
Run separate 115-volt, 60-Hz (230-volt, 50-Hz)
power to the remote box per Fig. 9. Use no. 14
AWG wire or larger and a proper field-supplied
electrical connector.
Install a Carrier-approved accessory electronic
thermostat or transmitter if remote sensor is used
(subbase not required) according to the installa­
tion instructions included with the accessory.
Note that the subbase is not used on units with
the Energy Management option. Locate the ther­
mostat or remote sensor, if used, in the condi­
tioned space where it will sense average
temperature.
Route thermostat cable or equivalent single leads
of no. 18 AWG eolored wire from thermostat or
transmitter terminals thru connector on unit to
low-voltage (TB4) connections in main control
box as shown on unit label wiring diagram and
in Fig. 9.
Run 24-volt wires between the remote box and
night setback box per Fig. 9. Use no. 18 AWG
wire for lengths up to 100 feet. Local codes may
dictate use of conduitfor low voltage. Knockouts
are provided in the night setback box and in the
fan deck separating heating section from section
containing the night setback box (Fig. 11). A
watertight connector is installed in side of unit.
Two rubber grommets are taped inside the night
setback box. Use grommets in knockouts in fan
deck and night setback box.
4.
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