GAYLORD C-6000 Series, Technical Manual

Page: 24 / 54

24
FIG. 14
CONTINUOUS COLD WATER MIST
OPTIONAL CONTINUOUS COLD WATER MIST
GENERAL
Continuous cold water mist is an option on all “CG3” Series
ventilators and is typically used on ventilators that cover solid
fuel burning appliances such as mesquite broilers.
Continuous cold water mist ventilators incorporate a water
manifold with spray nozzles, located at the lower edge of the
air inlet slot. (Refer to Figure 14) When the exhaust fan is
started, the solenoid valve in the cold water loop in the Gaylord
control cabinet opens (refer to illustration on Page 36), turning
on the mist nozzles which remain on as long as the exhaust fan
is on. The nozzles produce a very find mist and are located so
that the entire air stream passes through the mist. The purpose
of the mist is to knock down any hot embers, produced by the
solid fuel, that may be drawn up into the ventilator and to cool
down the exhaust air.
ENGINEERING
1. Pipe Size - 1/2" cold water supply required to the control
cabinet.
2. Water Pressure - 40 psi flow pressure. The control cabinet
is equipped with an adjustable pressure regulator.
3. Water Consumption - .66 gph/lineal ft. of ventilator.
MAINTENANCE
Every six months check the following:
1. Water Pressure - Turn on the exhaust fan, opening the
control cabinet door and check the water pressure gauge
in the cold water loop. Water flow pressure should be at 40
psi. If it is not, adjust the pressure regulator until 40 psi is
achieved.
2. Mist Nozzles - Turn on the exhaust fan, look into the air
inlet slot and check each mist nozzle for proper spray.
Remove and clean the nozzle if necessary.
TROUBLE-SHOOTING
1. If the mist nozzles do not come on when the fan is started,
check the following:
A. Open the electrical compartment of the control cabinet
and check to ensure that the cold water mist override
switch is in the “On” position.
B. Check the cold water mist hand valve in the control
cabinet to ensure that it is in the “Open” position.
C. Check the cold water mist solenoid coil for voltage.
Also check the coil for continuity.
D. Foreign material in the cold water supply line may have
clogged the solenoid valve and prevented its opening.
If this is the case, a alight tap on the solenoid valve
housing should release the valve.
2. If water mist is spraying out of the air inlet slot, check the
following:
A. With the cold water mist on, open the control cabinet
and check the pressure gauge to ensure that the flow
pressure is not above 40 psi. Adjust the pressure
reducing valve if necessary.
B. With the cold water mist on, check the mist nozzles
for even spray. Foreign particles in the nozzle could
cause an erratic mist causing it to come out the air
inlet slot.