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Product Overview
Condair GS
xxxxxxx_A_EN_1905_Condair-GS_OM
functions of the safety systems have been verified successfully, the gas valve(s) opens and the gas-
air mixture is pushed through the burner ports into the combustion chamber(s). The spark-igniter(s) is
simultaneously activated to ignite the gas-air mixture.
If a flame is not sensed by the flame sensor(s), the above sequence is repeated after 15 seconds. The
sequence is repeated upto a maximum of three times, after which the ignition control module(s) locks out
and the fault message
appears. If a flame is sensed by the flame sensor(s), the gas valve(s)
remains open and combustion continues. The gas valve(s) continues to maintain a constant air-to-gas
ratio independent of the blower speed or external conditions.
On the CS
models, the hot flue gases pass through the primary heat-exchanger then the secondary
heat-exchanger, where it is cooled further before it exits through the exhaust vent. The heat recovered
by the secondary heat-exchanger is used to warm up the feed water. On the standard-efficiency model,
the hot flue gases pass through the primary heat-exchanger and exit through the exhaust vent.
Water Management
The humidifier is equipped with a fill box and a float chamber that monitors the water level in the tank.
The combination fill box is connected to the tank and to the float chamber. The fill box is supplied with
water from the water supply, and from the secondary heat exchanger in CS models. A vacuum break
valve is used tprevent siphoning in the drain connection.
In the CS
model, a secondary heat-exchanger promotes higher efficencies. This is achieved by using
the heat from the exhaust to pre-heat the cold fill water entering the fill box. Water from the fill box then
enters the bottom of the tank.
The float chamber is connected to the top and bottom of the tank to monitor water levels with reference
to the low operational pressure inside the tank. The float chamber and its control board consists of two
magnetic floats (one is a backup) that measure the water level. These levels correspond to 3 LEDs on
a display panel and are monitored by the control software.
Water Levels:
L5 (yellow LED) — high water level
L4 (green and yellow LED) — intermediate water level
L3 (green LED) — middle water level
L2 (green and red LED) — intermediate water level
L1 (red LED) — low water level
On initial start-up, the dual fill valves fill the tank and the float chamber. A start-up test monitors the water
level as the tank and float chamber fills, and ensures proper functioning of the unit.
Note:
A fault message "Float Level" may appear at any time. This indicates an invalid combination of
readings from the control software (for example, if L5 and L1 LEDs activate at the same time).
1. The water level reaches the backup float, then the main float.
2. As water fills the float chamber and reaches the L1 level, the control software performs a test to
verify proper functioning of the dual fill valves and the drain pump.
a. Water enters the float chamber via the tank. The fill valves will allow water to fill the tank and
raise the water level in the float chamber to L5.
b. The drain pump energizes to lower the water level to just below L3.
Note:
The water levels should appear in ascending then descending order; L1, L2, L3, L4, L5, L4,
L3. A fault message "Fill Check Fault" appears if the water level does not rise to level L5. A fault
message "Drain Check" appears if the water lvel does not drop below the level L3.
3. When the test is complete, the dual fill valves activate and the water level should rise to level L3.
4. If a demand signal is present, the humidifier begins the combustion sequence.
5. The drain pump and dual fill valves maintain the water level between levels L2 and L5.
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