51
Reset thermostat at a position above room temperature. Com
-
pressor will shut off. Evaporator fan will shut off after a
30
-
second delay.
To shut off unit, set system selector switch at OFF position.
Resetting thermostat at a position above room temperature
shuts unit off temporarily until space temperature exceeds ther
-
mostat 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,
respectively. Evaporator fan operates continuously to provide
constant air circulation.
FASTENER TORQUE VALUES
Table 21 — Torque Values
START-UP, RTU OPEN CONTROLS
Heat shield screws
30 in.-lb (3.4 Nm) ±2 in.-lb (0.2 Nm)
Stator motor mounting
screws
23 in.-lb (2.6 Nm) ±2 in.-lb (0.2 Nm)
Fan rotor mounting
screws
23 in.-lb (2.6 Nm) ±2 in.-lb (0.2 Nm)
Limit switch screws
50 in.-lb (5.7 Nm) ±5 in.-lb (0.6 Nm)
Fan Deck bracket screws 50 in.-lb (5.7 Nm) ±5 in.-lb (0.6 Nm)
Condenser fan motor
mounting screws
30 in.-lb (3.4 Nm) ±3 in.-lb (0.3 Nm)
Condenser fan hub set
screw
60 in.-lb (6.8 Nm) ±5 in.-lb (0.6 Nm)
Compressor mounting
bolts
65 in.-lb (7.3 Nm) +10 in.-lb (1.2 Nm)
IMPORTANT: SET-UP INSTRUCTIONS
Installation, wiring and troubleshooting information for the
RTU Open Controller.: “RTU Open Multi-Protocol Control
-
ler Factory-Installed Option – Controls, Start-up, Operation
and Troubleshooting Instructions.” Have a copy of this man
-
ual available at unit start-up.
Summary of Contents for Preferred 549K 04-06
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Page 85: ...85 APPENDIX D WIRING DIAGRAMS Fig G 549K 04 06 Power Wiring Diagram 208 230 3 60...
Page 86: ...86 APPENDIX D WIRING DIAGRAMS Fig H 549K 04 06 Power Wiring Diagram 460 575 3 60...
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