___________________________________________________Chapter 4 – Smoke Control Section, Page 4-5
Smoke Control – Wash Cycle (Cont.)
Wash Cycle (Cont.)
One oscillating motor controls up the four wash manifolds, two ESP Cells high. Two oscillating motors are
used when the unit is three or four ESP Cells high. If the unit is a double pass, there are two complete sets
of manifolds and oscillating motors, one in front of the first pass of Cells and one if front of the second pass.
From either the Main Control Cabinet or a Sub Panel there is a 1-1/4” hot water line to a pressure
regulator, furnished by Gaylord, located at the water inlet of the ClearAir Unit. The pressure regulator must
be set for a flow pressure of 30 psi min. – 50 psi max. There is a pressure gauge inside the plumbing
compartment that houses the oscillating motor to assist in adjusting the flow pressure. This pressures is
needed for the proper spray pattern to adequately wash the Cells. The minimum water temperature
required is 140°F., and the maximum is 180°F. Important Note: The flow pressure at the Main Control
Cabinet or Sub Panel must be 40 psi min. – 80 psi max.
The Wash Cycle is initiated each time the Exhaust Fan is shut off by the Command Center, either by pushing
the STOP FAN button or automatically as programmed. If the ClearAir Unit is serving a water wash
Ventilator, the Ventilator wash cycle always occurs first followed by the ClearAir wash cycle.
Upon initiation of the ClearAir wash cycle, the unit is washed in the following sequence:
The 3 minute wash and rinse times are the standard recommend times to be programmed in the Command
Center. If the Cells are not adequately cleaned the wash cycle time may have to be increased and/or the
rinse time increase to allow more soaking time. The wash and rinse cycles may be programmed for
between 1-99 minutes.
The delay time between the washes and rinses are programmed in the Command Center for a length of
time necessary to allow the building’s hot water system to recover. The delay time may be programmed
for between 1-99 minutes.
Chapter 4 – Smoke Control Section, Page 4-6___________________________________________________
Wash Cycle Sequence
Units with 1 to 16 Cells
1.
3 minute wash
2.
Between a 1-99 minute delay
3.
3 minute wash
4.
Between a 1-99 minute delay
5.
3 minute rinse
The wash cycle is finished
Wash Cycle Sequence
Units with 18 to 32 Cells
1.
3 minute wash
2.
Between a 1-99 minute delay
3.
3 minute wash
4.
Between a 1-99 minute delay
5.
3 minute wash
6.
Between a 1-99 minute delay
7.
3 minute wash
8.
Between a 1-99 minute delay
9.
3 minute rinse
10.
Between a 1-99 minute delay
11.
3 minute rinse
The wash cycle is finished
Table T-4-5-1
Table T-4-5-2
