Table of Contents
Advertisement
The following section will enable you to correct minor opera-
tional difficulties and keep your Gaylord Ventilator operating at
the high performance levels for which it was designed.
SMOKE LOSS
1. If the Gaylord Ventilator is not exhausting properly, check
the following:
A. Air Velocity — Average air velocity through the air
entry slot should be in accordance with the Air
Velocity chart on Page 22. For proper method of
measuring the air velocity, refer to Page 23. If the
velocity is low, check for the following:
(1) Fire damper is open.
(2) Broken or slipping belt in exhaust fan.
(3) Proper rotation of exhaust fan wheel.
(4) Proper size of exhaust fan (fan must deliver
nameplate rating).
(5) Ductwork inspection panel left open.
B. The Gaylord Ventilator must have its own exhaust
system and no other exhaust, such as dishwasher
hoods, should be tied into it.
C. Exhaust Fan Discharge
(1) There should be no screen over the discharge. If
one is found, it should be removed.
(2) The direction of discharge should not be into the
prevailing winds nor downward onto the roof. A
vertical discharge is highly recommended.
D. Make-Up Air — Smoke loss may be experienced if
there is inadequate make-up air. Make-up air must be
supplied for replacement of air exhausted through all
kitchen exhaust systems. Make-up air should be
delivered through registers at ceiling height, and
distributed throughout the kitchen area. Make-up air
registers located near the ventilator, the louvers should
be adjusted to direct the air away from the ventilator.
Directing, or forcing make-up air at the ventilator
typically creates cross drafts resulting in smoke loss.
A general "rule of thumb" is that 75% to 80% of the
replacement air should be fresh, conditioned, (heated
or cooled) air brought into the kitchen area, with the
remaining 20% to 25% allowed to flow into the kitchen
from adjacent areas.
GREASE EXTRACTION
The Gaylord "CG" and "RG" Series Ventilators extract up to
95% of the grease, dust, and lint particles from the airstream
passing through it, when operated and maintained in accor-
dance with design specifications. If it appears that the
ventilator is not extracting properly, typically the exhaust
volume is low. Check the inlet slot velocity as described on
Pages 22 through 24.
EXHAUST FAN OPERATION
1. If the exhaust fan does not come on when the "Start Fan"
button is pushed or as programmed, if equipped with a time
clock ("TC" Series), and the "Fan On" light does not come
on, check the following:
A. The main power supply should be checked to make
sure it is turned on and is functioning.
B. Check fuse inside the control cabinet.
TROUBLE-SHOOTING
2. If the "Fan On" light on the Command Center is
illuminated, but the exhaust fan is not on, check the
following:
A. Check exhaust fan for loose or broken belts.
B. If "CG" Series ventilator or "RG" Series ventilator with
electrically operated damper, check the plunger arms
on the damper control switches to ensure the damper
is open. The plunger arms must all be in the reset
position. If the plunger arms will not reset and lock in
place, remove the lid, and check for mechanical mal-
function in the interior. (Refer to Figure 21).
C. If "RG" Series ventilator with fuse link operated damper,
check the fire damper at the exhaust duct collar to make
sure that the damper is in the open position.
D. Magnetic starter for exhaust fan — It is possible that
the overload protectors within the magnetic starter
switch may have actuated and stopped the fan. Push
the "reset" button on the magnetic starter, and then
push the "Start Fan" button on the Command Center.
E. In the event that an H.O.A. (Hands On/Automatic) type
magnetic starter switch is used, check the selector
switch to make sure it is in the automatic position.
F. Check exhaust fan motor circuit breaker and check
fuses in disconnect switch normally located next to the
fan.
18
FIG. 21
DAMPER CONTROL SWITCH
Hide quick links:
Advertisement
Table of Contents
