MAN205-0195042EN Rev. A Aug. 2011
Page 18 of 137 pages
3.1.3 GICAR Water Level Controller
The water level control system consists of three electrodes. (HIGH and LOW water
level), and a reference electrode, all connected to the GICAR 2DRLHG controller.
The long electrode which is continuously immersed in the water, acts as a reference and
is connected to ground.
The medium electrode (LOW level electrode) controls the water heaters. When it stops
sensing water, the GICAR controller stops the current to the water heaters. When it
senses water, the GICAR controller restores current to the water heaters.
The short electrode (HIGH level electrode), controls the water pump. When it senses
water, the GICAR controller stops the current to the water pump and simultanausly
closes water supply shut off valve. When it stops s ensing water, the GICAR controller
restores the current to the water pump and simultanausly opens water supply shut off
valve.
GICAR 2DRLH
S
R
1
S
M
1
S
m
1
S
R
2
S
M
2
S
m
2
RL1
RL2
S
E
S E
L N
RL1
RL2
Water
Pump
Heater
Electrode
Low Low
Reference
Electrode
low
(heater)
Electrode
high
(water )
44 45 46
VAC
1
2 3