Optional Continuous Cold Water Mist - GAYLORD CG Series Technical Manual

GENERAL
Continuous cold water mist is an option on all "CG" or "RG"
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 28) 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 30), 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 (2.8 kg/cm
control cabinet is equipped with an adjustable pressure
regulator.
3. Water Consumption - .66 gph/lineal ft. (8.19 LM/lineal
meter) 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
2
40 psi (2.8 kg/cm ). If it is not, adjust the pressure
regulator until 40 psi (2.8 kg/cm

OPTIONAL CONTINUOUS COLD WATER MIST

2
) flow pressure. The
2
) is achieved.
CONTINUOUS COLD WATER MIST
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 (2.8 kg/cm
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.
FIG. 27
25
2
). Adjust the