Carrier 50FC M20 Series - Heating; Ventilation (Continuous Fan); Fastener Torque Values; Start-Up, Systemvu Controls

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To shut off unit, set system selector switch at OFF position. Reset-
ting thermostat at a position above room temperature shuts unit off
temporarily until space temperature exceeds thermostat setting.
Heating
To start unit, turn on main power supply. Set system selector
switch to the HEAT position and set thermostat at a setting above
room temperature. Set fan to AUTO position.
First stage of thermostat energizes the first stage of the electric
heaters. Second stage of thermostat energizes the second stage
of electric heaters (if installed). Check heating effects at air
supply grille(s).
If electric heaters do not energize, reset limit switch (located on
supply-fan scroll) by pressing button located between termi-
nals on the switch.
To shut unit off, set system selector switch to the OFF position.
Resetting thermostat at a position below room temperature
temporarily shuts unit off until space temperature falls below
thermostat setting.
Ventilation (Continuous Fan)
Set fan and system selector switches at ON and OFF positions, re-
spectively. Evaporator fan operates continuously to provide con-
stant air circulation. When the evaporator-fan selector switch is
turned to the OFF position, there is a 30-second delay before the
fan turns off.
FASTENER TORQUE VALUES
START-UP, SYSTEMVU CONTROLS
Table 15 — Torque Values
Stator Motor Mounting
Screws
50 in.-lb (5.7 Nm) +
5 in.-lb (0.6 Nm)
Fan Rotor Mounting
Screws (2.4 HP)
50 in.-lb (5.7 Nm) +
5 in.-lb (0.6 Nm)
Fan Rotor Mounting
Screws (3 and 5 HP)
30 in.-lb (3.4 Nm) +
2 in.-lb (0.2 Nm)
Fan Deck Bracket Screws 50 in.-lb (5.7 Nm) + 5 in.-lb (0.6 Nm)
Fan Casing Screws 10 in.-lb (1.1 Nm) +
1 in.-lb (0.1 Nm)
Heat Shield Screws 30 in.-lb (3.4 Nm) +
2 in.-lb (0.2 Nm)
Condenser Motor
Mounting Screws
30 in.-lb (3.4 Nm) + 2 in.-lb (0.2 Nm)
Condenser Hub Set Screw 84 in.-lb (9.5 Nm) + 12 in.-lb (1.5 Nm)
Compressor Mounting
Bolts
12 ft-lb (16.2 Nm) + 2 ft-lb (2.7 Nm)
Tandem Rail Mounting
Bolts
8 ft-lb (10.8 Nm) +
0.5 ft-lb (0.6 Nm)
Crankcase Heater 22.5 in.-lb (2.5 Nm) + 2.5 in.-lb (0.3 Nm)
IMPORTANT: SET-UP INSTRUCTIONS
Installation, wiring and troubleshooting information for the
SystemVu™ Controller.: “48/50FC04-30, 48/50GC04-06
Single Package Rooftop Units with SystemVu Controls
Version X.X Controls, Start-up, Operation and
Troubleshooting.” Have a copy of this manual available at
unit start-up.