71
3. Set system switch selector at HEAT position and fan switch at
AUTO. or ON position. Set heating temperature lever above
room temperature.
4. The induced-draft motor will start.
5. After a call for heating, the main burners should light within
5 seconds. If the burner does not light, then there is a 22 sec
-
ond delay before another 5 second try. If the burner still does
not light, the time delay is repeated. If the burner does not
light within 15 minutes, there is a lockout. To reset the con
-
trol, break the 24-v power to W1.
6. The evaporator-fan motor will turn on 45 seconds after burner
ignition.
7. The evaporator-fan motor will turn off in 45 seconds after the
thermostat temperature is satisfied.
8. Adjust airflow to obtain a temperature rise within the range
specified on the unit nameplate.
NOTE: The default value for the evaporator-fan motor on/off de
-
lay is 45 seconds. The Integrated Gas Unit Controller (IGC) modi
-
fies this value when abnormal limit switch cycles occur. Based
upon unit operating conditions, the on delay can be reduced to
0 seconds and the off delay can be extended to 180 seconds. When
one flash of the LED is observed, the evaporator-fan on/off delay
has been modified.
If the limit switch trips at the start of the heating cycle during the
evaporator on delay, the time period of the on delay for the next
cycle will be 5 seconds less than the time at which the switch
tripped. (Example: If the limit switch trips at 30 seconds, the evap
-
orator-fan on delay for the next cycle will occur at 25 seconds.) To
prevent short-cycling, a 5 second reduction will only occur if a
minimum of 10 minutes has elapsed since the last call for heating.
The evaporator-fan off delay can also be modified. Once the call
for heating has ended, there is a 10 minute period during which the
modification can occur. If the limit switch trips during this period,
the evaporator-fan off delay will increase by 15 seconds. A maxi
-
mum of 9 trips can occur, extending the evaporator-fan off delay
to 180 seconds.
To restore the original default value, reset the power to the unit.
To shut off unit, set system selector switch at OFF position. Re
-
setting heating selector lever below room temperature will tem
-
porarily shut unit off until space temperature falls below thermo
-
stat 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.
START-UP, PREMIERLINK CONTROLS
START-UP, RTU-OPEN CONTROLS
FASTENER TORQUE VALUES
NOTICE: SET-UP INSTRUCTIONS
All set-up and set point configurations are factory set and field-
adjustable.
Refer to the PremierLink Installation, Start-Up and Configura
-
tion Instructions for specific operating instructions for the con
-
troller. Have a copy of this manual available at unit start-up.
NOTICE: SET-UP INSTRUCTIONS
Refer to the following manuals for additional installation, wir
-
ing and troubleshooting information for the RTU-OPEN Con
-
troller.: “Controls, Start-up, Operation and Troubleshooting In
-
structions,” “RTU Open Installation and Start-up Guide” and
“RTU-Open Integration Guide”. Have a copy of these manuals
available at unit start-up.
Table 38 —
Torque Values
LOCATION
TORQUE VALUES
Supply fan motor
mounting
120 in.-lb (13.6 Nm) ± 12 in.-lb (1.4Nm)
Supply fan motor
adjustment plate
120 in.-lb (13.6 Nm) ± 12 in.-lb (1.4Nm)
Motor pulley setscrew
72 in.-lb (8.1 Nm) ± 5 in.-lb (0.6 Nm)
Fan pulley setscrew
72 in.-lb (8.1 Nm) ± 5 in.-lb (0.6 Nm)
Blower wheel hub
setscrew
72 in.-lb (8.1 Nm) ± 5 in-.lbs (0.6 Nm)
Bearing locking collar
setscrew
50 in.-lb (6.2 Nm) -60 in.-lb (6.8 Nm)
Compressor mounting
bolts
65 in.-lb (7.3 Nm) -75 in.-lb (8.5Nm)
Condenser fan motor
mounting bolts
20 in.-lb (2.3 Nm) ± 2 in.-lb 0.2 Nm)
Condenser fan hub
setscrew
84 in.-lb (9.5 Nm) ± 12 in.-lb (1.4 Nm)
Summary of Contents for 48TC series
Page 40: ...40 Fig 56 Typical IGC Wiring Diagram...
Page 41: ...41 Fig 57 Integrated Gas Control IGC Board RED LED STATUS...
Page 47: ...47 Fig 62 RTU Open Overlay for Economizer Wiring...
Page 48: ...48 Fig 63 VFD Overlay for W2770 Controller Wiring...
Page 97: ...97 Fig D 48TC D17 D30 Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS...
Page 98: ...98 Fig E 48TC D17 D30 Power Diagram 460 3 60 APPENDIX D WIRING DIAGRAMS...
Page 99: ...99 Fig F 48TC D17 D30 Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS...
Page 100: ...100 Fig G 48TC D17 D30 Control Diagram with Humidi MiZer System APPENDIX D WIRING DIAGRAMS...
Page 104: ...104 Fig K PremierLink System Control Wiring Diagram APPENDIX D WIRING DIAGRAMS...
Page 106: ...106 Fig M RTU OPEN Wiring Diagram APPENDIX D WIRING DIAGRAMS...
Page 107: ...107 Fig N RTU OPEN Wiring Diagram with Humidi MiZer System APPENDIX D WIRING DIAGRAMS...
Page 109: ......