48
SETUP
1. Turn the adjusting screw on the front clockwise until tight (do
not strip threads).
2. Turn the fan on at high speed.
3. Reset the flag, if showing.
4. Turn the screw counter-clockwise, until the flag shows.
5. Turn the screw clockwise 1-1/2 turns and reset the flag.
RESET
Turn the red knob on the front of the switch, until the flag disap-
pears.
Phase Monitor
A phase monitor is included on all 62X units with Revision H con-
trols. The phase monitor is used to monitor the input power for
phasing, balance, over/under voltage, and power loss to protect the
unit components from damage. If any of the above conditions are
detected by the phase monitor, unit control power will be inter-
rupted and the unit will be unable to operate. When the power
state returns to normal, the power monitor will allow control oper-
ation. The power monitor features adjustable delay on make, delay
on break, and voltage unbalance dials on the top of the monitor.
See Table 18 and Fig. 76 for power monitor specifications.
Table 18 — Phase Monitor
Energy Management Relay
The 62X units have Emergency Relay (EMR) functionality built
in to the unit controller. The EMR can act as an emergency shut-
down. Use of the emergency relay requires a field provided and
installed relay. For Emergency Shutdown applications, a normally
closed (N.C.) relay is recommended. The typical wiring connec-
tion for the relay is from UI-27 on the LS-1628 controller. See the
Tech Settings screen for Emergency Shutdown (EMR) settings.
Consult the unit wiring diagram for specific wiring locations. See
Fig. 77.
Fig. 77 — EMR Wiring
Energy Recovery Wheel VFD Control
SUPPLY/EXHAUST
The DC1 VFD may be used to control the speed of various mo-
tors. See Fig. 78. The VFD can be controlled in three ways:
• No duct pressure transducer (DPT) or airflow monitor-
ing station selected — The VFD, which is standard on the
62X, or ECM will be used to balance the airflow and the
unit will be treated as a constant volume unit.
• DPT option — The ECM or the VFD will be controlled
by a duct pressure sensor (see Fig. 15) to maintain a specif-
ic set duct pressure. The supply fan is controlled to the
duct pressure and the exhaust fan (if the unit has exhaust)
is controlled to the space pressure.
• Airflow monitoring station option — The unit will ad-
just the fans to maintain a specific CFM required.
P-10 must be set first on supply and exhaust fans as this changes
P-01 and P-02 from Hz to RPM.
P-14 must be set to access the higher parameters.
See Tables 19-21.
Fig. 76 — Phase Monitor Details
Sensor Name R-K Electronics DPM
Line Voltages Monitored
200 to 240VAC, 1Ø, 50/60Hz
200 to 600VAC, 3Ø, 50/60Hz
Frequency Range 45-65 Hertz for all voltages
Phase Rotation A-B-C
Faults
Overvoltage
Undervoltage
Phase Loss
Phase Rotation
Phase Imbalance
Frequency Out of Range
Over/Undervoltage % 7-15%
Trip Time Delay 2-10 seconds
Re-Start Time Delay Manual reset to 4 minutes
Phase Imabalance % 3-10%
Phase Loss ≥30% low voltage in any one phase
Dimensions
Width: 3 in.
Height: 5 in.
Depth: 2in.
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