Operating instructions

Figure 4. Typical 120/220 Volt Residential Applications
HEATER
HIGH
RETURN
SHIELD
GIT-4 CONTROL
GIT-4 SENSOR
YELLOW
YELLOW
GREEN
RED
WHITE
BLACK
ELECTRONICS
WHITE
BLACK
GREEN
BLUE
BLUE
RCU-2
NEUTRAL / LINE 2
LINE / LINE 1
SAFETY GROUND
120 / 240 VOLT SUPPLY
(GFEP PROTECTED)
Figure 5. Unbalanced 208 or 277 3-Phase Applications
HEA TER
HIGH
RETURN
SHIELD
208 / NEUTRAL
208 / 277
SAFETY GROUND
208 OR 277 VO LT 3-PHASE SUPPL Y
(GFEP PROTECTED)
GI T- 4 CONTROL
GI T- 4 SENSOR
YELLOW
YELLOW
GREEN
RED
WHITE
BLACK
ELECTRONICS
WHITE
BLACK
GREEN
BLUE
BLUE
RCU-2
Post Installation Tests
Thoroughly check the system before placing it in service. Our experience shows that installation errors cause the
majority of problems. Frequently encountered problems include wiring errors and improper waterproofing. Simple electrical
tests and visual inspections identify these problems.
Checking the sensor in the field is not practical. Verifying its operation requires special test equipment that is
neither portable nor commonly available.
Checking the operation of the control requires a clamp-on AC ammeter. Follow the steps below to verify
operation. The gutter and downspout must be dry while doing these tests.
1. Remove power from the snow and ice melting system. There may be two points of disconnect.
2. Remove the cover from the GIT–4 controller.
3. Clamp the ammeter to one of the yellow leads in the GIT–4 controller.
4. Apply power to the snow and ice melting system. This may require two points of connection. Use care.
Lethal voltages are now present withing the control enclosure. The ammeter should read approximately
zero amps.
5. At the RCU–2 remote control, press the HEATER TOGGLE switch momentarily. The HEATER indicator
should operate. If the SUPPLY and HEATER indicators fl ash alternatively, a GFEP condition or a GFEP
circuit failure exists.
6. At the GIT–4 controller, the ammeter should read the nominal heater current.
7. At the RCU–2 remote control, press the HEATER TOGGLE switch momentarily. The HEATER indicator
should turn off.
8. At the GIT–4 controller, the ammeter should read zero amps.