5
Units with Electro-mechanical controls
The Fan Speed set up controls are located on the lower section
of the Unit Control Board (UCB). See Fig. 7 for location.
1. Check the job specifications for the CFM (cubic feet per
minute) and ESP (external static pressure) required.
2. Using the chart on the Fan Speed Set Up labels (see
Fig. 8), calculate the Vdc from the CFM and ESP for the
base unit.
3. If installing any accessories listed at the bottom of the Set
Up Label, add accessory Vdc to base unit Vdc in upper
portion of label. For electric heaters use only one adder.
(ex. 2 stage heater uses only 2 stage adder, not 1 stage plus
2 stage)
NOTE: The Fan Speed Set Up labels are located on the High Volt-
age cover in the Control Box.
4. Connect a multimeter to the Vdc terminals on the UCB.
5. Set the Range Switch to either A, B, or C per the Switch
Range table.
6. Using a straight blade screwdriver turn the Vdc control
dial to fine tune the Vdc reading.
7. Record the reading in the Field Setting field.
Low Speed Fan Adjustment
2-Pin DIP Switch
The Low Speed 2-Pin DIP switch is located near the center of
the UCB. See Fig 7.
When replacing UCB, the board will be sent as factory default
without a low speed selected. To select correct 551K low fan
speed, set Dip Switch 1 to the "ON” position (see Table 1). The
dip switch positions can also be found on the unit's control
label diagram.
Table 1 — Low Speed 2-Pin DIP Switch Settings
Fig. 7 — UCB Fan Speed Controls
LOW SPEED
% OF USER SET
FAN SPEED
DIP1 DIP2
0 0
100%
1
0 75%
FAN SPEED SET UP CONTROLS
Содержание 551K 04N Series
Страница 15: ...15 Fig 27 Condenser Fan Assembly Screw Pattern Sequence 1 2 3 4 5 NO SCREW Blank Tab ...
Страница 82: ...82 APPENDIX D WIRING DIAGRAMS Fig E 551K 04 06 208 230 1 60 Unit with RTU Open Controller ...
Страница 83: ...83 APPENDIX D WIRING DIAGRAMS Fig F 551K 04 06 208 230 3 60 Unit with RTU Open Controller ...
Страница 84: ...84 APPENDIX D WIRING DIAGRAMS Fig G 551K 04 06 460 575 3 60 Unit with RTU Open Controller ...
Страница 85: ...85 APPENDIX D WIRING DIAGRAMS Fig H 551K 04 06 Power Wiring Diagram 208 230 1 60 ...
Страница 86: ...86 APPENDIX D WIRING DIAGRAMS Fig I 551K 04 06 Power Wiring Diagram 208 230 3 60 ...
Страница 87: ...87 APPENDIX D WIRING DIAGRAMS Fig J 551K 04 06 Power Wiring Diagram 460 575 3 60 ...
Страница 89: ......
