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Wiring
As indicated above, the Gate will function using a wide variety of control inputs. Consult the
architectural plans for the required control functions, then refer to the specific Delta Scientific
Application Guide that covers that function. Common to all hookups:
1)
Standard Power input is 120/1/60 VAC for Gate Motor and control power. The SG1420
may be ordered from the factory equipped to operate at 240/1/50 also. Conduit should
be run from below grade to the center stub-up area as shown in the installation drawing.
Field wiring connections are terminated at terminals L1 (hot) and L2 (neutral). Other
input voltages are available, and must be selected at time of order. The unit should be
grounded at the provided terminal (green).
2)
Switch function:
a)
Gate Auto-Manual: With the Power 'On', switching the Auto-Manual switch to
'Manual' will vend (raise) the Gate. To reset the Gate, switch Auto-Manual to
'Reset' position momentarily.
b)
Heater On-Off –Auto: Gate may be optionally supplied with a 60 watt heater to
guard against condensation on the gate interior surfaces and to provide some
heating to reduce gear box lube oil viscosity in extreme cold. We suggest that the
heater switch be placed in the 'Auto' position at all times.
Limit Switch Adjustment
The Limit Switches are preset at the factory for standard operation across a level lane. The limit
switches are adjustable to allow gate arm travel adjustments, where necessary.
CAUTION: Do NOT attempt to adjust the limit switches with the power on. Power
switch must be placed in the 'Off' Position before adjustments are made. The
directions indicated below are made when viewing the Gate from the gate arm
side, Gate raise direction is clockwise (CW), Gate lower direction is counter-
clockwise (CCW).
1)
To adjust the gate arm for more downward travel, loosen the thumbscrew on the down
limit switch cam and rotate slightly CW. Tighten screw, turn Power switch 'On' and check
by operating the Auto-Manual switch. Turn Gate 'Off' and re-adjust as necessary.
2)
To adjust the gate arm for less downward travel, loosen the thumbscrew on the down
limit switch cam and rotate slightly CCW. Confirm as above.
3)
To adjust the gate arm for more upward travel, loosen the thumbscrew on the up limit
switch cam and rotate slightly CCW, Confirm as above.
4)
To adjust the gate arm for less upward travel, loosen the thumbscrew on the up limit
switch cam and rotate slightly CW. Confirm as above.
Copyright 2001 Delta Scientific Corporation
All Rights Reserved
Document: A2026.3 SG1420 Instructions
Page 5 of 18
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