70
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-second 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 control, 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 pe-
riod, the evaporator-fan off delay will increase by 15 seconds. A
maximum 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. Reset-
ting heating selector lever below room temperature will temporar-
ily shut unit off until space temperature falls below thermostat set-
ting.
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
Use the Carrier network communication software to start up and
configure the PremierLink controller.
Changes can be made using the ComfortWORKS
®
software,
ComfortVIEW™ software, Network Service Tool, System Pi-
lot™ device, or Touch Pilot™ device. The System Pilot and
Touch Pilot are portable interface devices that allow the user to
change system set-up and set points from a zone sensor or termi-
nal control module. During start-up, the Carrier software can also
be used to verify communication with the PremierLink controller.
NOTE: All set-up and set point configurations are factory set and
field-adjustable.
For specific operating instructions, refer to the literature provided
with user interface software.
Perform System Check-Out
1. Check correctness and tightness of all power and commu-
nication connections.
2. At the unit, check fan and system controls for proper
operation.
3. At the unit, check electrical system and connections of any
optional electric reheat coil.
4. Check to be sure the area around the unit is clear of con-
struction dirt and debris.
5. Check that final filters are installed in the unit. Dust and
debris can adversely affect system operation.
6. Verify that the PremierLink controls are properly con-
nected to the CCN bus.
START-UP, RTU-OPEN CONTROLS
FASTENER TORQUE VALUES
See Table 39 for Torque values.
Table 39 — Torque Values
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or
death.
The unit must be electrically grounded in accordance with lo-
cal codes and NEC ANSI/NFPA 70 (American National Stan-
dards Institute/National Fire Protection Association).
NOTICE
SET-UP INSTRUCTIONS
All set-up and set point configurations are factory set and
field-adjustable.
Refer to 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
Installation, wiring and troubleshooting information for the
RTU-OPEN Controller.: “Controls, Start-up, Operation and
Troubleshooting Instructions,” “RTU Open Installation and
Start-up Guide” and “RTU-Open Integration Guide.” Have a
copy of these manuals available at unit start-up.
LOCATION
TORQUE VALUE
Supply fan motor mounting
120 in-lbs (13.6 Nm) ±12 in-lbs
(1.4Nm)
Supply fan motor adjustment plate
120 in-lbs (13.6 Nm) ±12 in-lbs
(1.4Nm)
Motor pulley setscrew
72 in-lbs (8.1 Nm) ± 5 in-lbs (0.6 Nm)
Fan pulley setscrew
72 in-lbs (8.1 Nm) ± 5 in-lbs (0.6 Nm)
Blower wheel hub setscrew
72 in-lbs (8.1 Nm) ± 5 in-lbs (0.6 Nm)
Bearing locking collar setscrew
50 in-lbs (6.2 Nm) – 60 in-lbs (6.8 Nm)
Compressor mounting bolts
65 in-lbs (7.3 Nm) – 75 in-lbs (8.5Nm)
Condenser fan motor mounting
bolts
20 in-lbs (2.3 Nm) ± 2 in-lbs 0.2 Nm)
Condenser fan hub setscrew
84 in-lbs (9.5 Nm) ± 12 in-lbs (1.4 Nm)
Summary of Contents for WeatherMaster 48HC04 Series
Page 37: ...37 Fig 60 Integrated Gas Control IGC Board RED LED STATUS ...
Page 45: ...45 Fig 65 RTU Open Overlay for Economizer Wiring ...
Page 46: ...46 Fig 66 VFD Overlay for W2770 Controller Wiring ...
Page 98: ...98 Fig E 48HC A07 YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 100: ...100 Fig G 48HC D11YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 101: ...101 Fig H 48HC D12 YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 102: ...102 Fig I 48HC A04 A06 YAC Power Diagram 208 230 1 60 APPENDIX D WIRING DIAGRAMS ...
Page 103: ...103 Fig J 48HC A04 A06 YAC Power Diagram 208 230 3 60 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 104: ...104 Fig K 48HC A04 A06 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 107: ...107 Fig N 48HC A07 A12 YAC Power Diagram 208 230 3 60 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 108: ...108 Fig O 48HC A07 A12 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 109: ...109 Fig P 48HC D08 D09 YAC Power Diagram 230 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 110: ...110 Fig Q 48HC D08 D09 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 111: ...111 Fig R 48HC D11 YAC Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 112: ...112 Fig S 48HC D11 YAC Power Diagram 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 113: ...113 Fig T 48HC D11 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 114: ...114 Fig U 48HC D12 YAC Power Diagram 230 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 115: ...115 Fig V 48HC D12 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 116: ...116 Fig W 48HC D14 YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 117: ...117 Fig X 48HC D14 YAC Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 118: ...118 Fig Y 48HC D14 YAC Power Diagram 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 119: ...119 Fig Z 48HC D14 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 142: ...142 Fig AW PremierLink System Control Wiring Diagram System APPENDIX D WIRING DIAGRAMS ...
Page 144: ...144 Fig AY RTU Open Wiring Diagram APPENDIX D WIRING DIAGRAMS ...