GSI PNEG-501 User Manual
Fan And Heater
Application
Guide
PNEG-501
Fan/Heater Application
Roof Warning, Operation & Safety................................................................................4
Safety Alert Decals........................................................................................................5
Fan Application Guide........................................................................................................6
Fan Application Guide......................................................................................................7
Fan Selection..................................................................................................................8
Aeration System Requirements.......................................................................................9
Example..............................................................................................................10
Situation..............................................................................................................11
Fan Performance Specifications..................................................................................12
Suggested Airflow Rates............................................................................................13
Static Pressure Charts....................................................................................................14
Beans w/ stirring........................................................................................................14
Corn w/ stirring......................................................................................................15
Rice w/ stirring.....................................................................................................16
Wheat w/ stirring....................................................................................................17
Barley..................................................................................................................18
Beans..................................................................................................................19
Clover..................................................................................................................20
White Popcorn.....................................................................................................21
Earcorn................................................................................................................22
Flax.....................................................................................................................23
Milo.....................................................................................................................24
Oats.....................................................................................................................25
Peanut.................................................................................................................26
Popcorn...............................................................................................................27
Rape....................................................................................................................28
Rice.....................................................................................................................29
Wheat..................................................................................................................30
Heater Application and Sizing....................................................................................31
Plenum Temperature........................................................................................................32
TABLE OF CONTENTS
3
ROOF WARNING, OPERATION & SAFETY
Roof Damage Warning and Disclaimer
GSI DOES NOT WARRANT ANY ROOF DAMAGE
CAUSED BY EXCESSIVE VACUUM OR INTERNAL
PRESSURE FROM FANS OR OTHER AIR MOVING
SYSTEMS. ADEQUATE VENTILATION AND/OR
"MAKEUP AIR" DEVICES SHOULD BE PROVIDED
FOR ALL POWERED AIR HANDLING SYSTEMS.
GSI DOES NOT RECOMMEND THE USE OF DOWNWARD FLOW SYSTEMS (SUCTION). SEVERE
ROOF DAMAGE CAN RESULT FROM ANY BLOCKAGE OF AIR PASSAGES. RUNNING FANS DURING
HIGH HUMIDITY/COLD WEATHER CONDITIONS
CAN CAUSE AIR EXHAUST OR INTAKE PORTS TO
FREEZE.
Fan/Heater Application
Fuel Warning
Important! Do not use propane tanks which have previously been used for ammonia unless they
have been purged according to procedures of the National L. P. Association.
Be sure fuel supply system complies with all local codes for L. P. gas installations.
DO NOT USE FLAME FOR LEAK TESTING.
Power Warning
Be sure power is disconnected and locked out before installation!
Failure to do so may cause serious injury or death.
Important! Heater must be interlocked with fan for safe operation.
Important! Thermostat must be installed for safe operation.
Proper Use of Product
This product is intended for the use of grain drying only! Any other use is a misuse of this product.
This product has sharp edges! These sharp edges may cause serious injury. To avoid injury
handle sharp edges with caution and use proper protective clothing and equipment at all times.
Guards are removed for illustration only. All guards must be in place before and during operation.
4
Fan/Heater Application
CAUTION! BE VERY
CAREFUL WHEN
CHECKING OUT 220V OR
460V CONTROL CIRCUIT.
SERIOUS INJURY OR
DEATH MAY OCCUR IF
PROPER PRECAUTIONS
ARE NOT TAKEN.
SAFETY ALERT DECALS
FAILURE TO INSTALL
THERMOSTAT INCREASES RISK OF FIRE IN BIN!
WARRANTIES ARE VOID ON HEATERS INSTALLED
WITHOUT THERMOSTATS.
The GSI Group, Inc. recommends contacting your local power
company, and having a representative survey your installation so the
wiring is compatible with their system, and adequate power is supplied to your unit.
Safety decals should be read
and understood by all people in
the grain handling area.
If a decal is damaged or is
missing contact:
The GSI Group, Inc.
1004 E. Illinois St.
Assumption, IL 62510
217-226-4421
A free replacement will be sent to
you.
BE SURE POWER IS
DISCONNECTED AND
LOCKED OUT BEFORE
INSTALLATION. FAILURE
TO DO SO MAY CAUSE
SERIOUS INJURY OR
DEATH
5
FAN APPLICATION GUIDE
3500RPM Vane Axial fans are normally high performance low static pressure
fans. They are normally used for inbin drying or aeration on shorter tanks or when
low resistance grains (corn, soybeans are processed. The application should be
looked at very closely when aerating unusually tall tanks or high resistance grains
NO
Vane Axial Fans
(wheat, milo).
YES
Fan/Heater Application
NO
Inline Centrifugal Fans
3500RPM Inline Centrifugal fans are normally medium performance medium
static pressure fans. They are normally used for aeration on taller tanks or when
high resistance grains (wheat, milo) are processed. Inlines may also be used in
drying applications however care should be taken to use correct adapters when
using gas heaters with these fans. These fans are often mis-applied and sold as a
quiet drying fan when a vane axial fan of equal horsepower will most likely out
perform it. The application should be looked at very closely when aerating unusu-
ally tall tanks or high airflow resistance grains (wheat, milo).
NO
YES
MAYBE
6
Fan/Heater Application
1750RPM Centrifugal fans are normally high performance, medium static pressure
fans. They are normally used for aeration or drying on shorter tanks or when low
resistance grains (corn, soybeans) are processed. These fans may be used with gas
heaters, either mounted on the inlet side of the fan or downwind on the outlet side.
Greater airflow is attained when the heaters are mounted downwind. Fans larger
than 30HP require a 17" tall plenum (floor) so the transition will clear. The
application should be looked at very closely when aerating unusually tall tanks or
FAN APPLICATION GUIDE
1750RPM Centrifugal Fans
high resistance grains (wheat, milo).
NO
YES
3500RPM Centrifugal Fans
3500RPM Centrifugal fans are normally medium preformance high static pressure
fans. They are normally used for aeration on taller tanks or when high resistance
grains (wheat, milo) are processed. These fans are not normally used with heaters.
Although these fans are less expensive than 1750RPM fans they are not normally
used on shallower grain depths because 1750RPM fans give much greater perfor-
mance for the horsepower at shallow depths thus less horsepower is required.
MAYBE
YES
NO
MAYBE
7
FAN & ROOF VENT SELECTION
Fan/Heater Application
STEP 1
LEVEL FILL
PEAKED FILL
STEP 2.
Use SUGGESTED AIRFLOW RATES (page 13-30) for
desired drying or aeration conditions.
STEP 3.
For a selected grain, find the static pressure for the
corresponding AVE GRAIN DEPTH and AIRFLOW
RATE. Use the nearest height or approximate where
necessary. Where stirring machines are to be used, use
charts for stirring.
STEP 4.
BUSHELS = AVE GRAIN DEPTH (ft) x 0.6594 x
DIAMETER (ft) x DIAMETER (ft)
Since the calculation uses an average grain depth, the
capacity may vary from published sales capacities.
STEP 5.
TOTAL AIRFLOW (cfm) = AIRFLOW RATE x
BUSHELS
If more than one fan is desired for a system, divide the
TOTAL AIRFLOW by the number of fans to get the
CFM REQUIRED PER FAN for fan Selection.
STEP 6.
TABLE for vane axial or centrifugal fans, the TOTAL
. Determine the average grain depth
for a desired bin size:
-AVE GRAIN DEPTH (ft) =
EAVE HEIGHT (ft) - FLOOR HEIGHT ft)
- AVE GRAIN DEPTH (ft) =
EAVE HEIGHT (ft) + BIN DIAMETER
(ft) ÷12, Minus FLOOR HEIGHT (ft)
Select airflow rate in CFM/BU:
Using the STATIC PRESSURE
TABLES:
Determine bin capacity:
This capacity includes 5% compaction.
Find the required TOTAL AIR
FLOW in CFM:
IMPORTANT!
Using the FAN PERFORMANCE
STATIC PRESSURE from Step 3, and the CFM
PER FAN from Step 5, select the fan best
meeting the requirements. For best fan performance, a fan should run in the mid-range of is static
pressure ratings, if possible. Should excessive
static pressures be encountered, as with small grain
or very high airflows, consult GSI engineering for
the best fan choice.
NOTE:
tank aeration is in question.
Consult GSI engineering where hopper
Roof Vent Selection
STEP 7.
NUMBER ROOF VENTS = TOTAL AIRFLOW
(cfm) ÷ 1800 (cfm per vent)
If less than a full bin is intended an increased
number of roof vents will be necessary. The same
fan will produce a greater airflow when the bin is
less than full, due to less resistance from the grain.
An inadequate number of vents may have two
undesired effects
1) adding to the static pressure causing poor
fan performance and less air through the grain than
intended, and
2) possible structural damage to the roof
due to this increased pressure. Ideally, there should
be near zero static pressure in the space between the
grain and the roof.
A good estimate of vent numbers particularly in drying situations, would be using the CFM
from the FAN PERFORMANCE TABLE at onehalf the static pressure anticipated. This new value
should be divided by 1800 CFM/VENT.
Determine MINIMUM number of
roof vents:
8
Fan/Heater Application
AERATION SYSTEM REQUIREMENTS
Full perforated floors are recommended in most DRYING situations. Floor
gauges
the grain load for a particular bin size. Please
inquire
(formed in concrete) systems are recommended when aeration only is desired. The
two most important aspects of aeration design
are the total perforated floor area and the
entrance duct cross-sectional area. Floors
should be sized for a maximum intended
airflow rate. To add larger fans or bin rings at
a later date may result in less than satisfactory
aeration performance.
mum requirement check for potential designs.
GSI floor designs will meet these requirements and be optimised for the best results.
STEP 8.
from
PERFORATED AREA (sq ft) = TOTAL
AIRFLOW ÷ 30cfm/sq ft.
and support spacing are dependent on
as to exact specifications. Flush floor
These steps are intended as a mini-
Determine MINIMUM re
quired perforated floor area
using TOTAL AIRFLOW
step 5.
STEP 9.
sectional area of air supply duct.
SUPPLY DUCT AREA (sq ft) = TOTAL
AIRFLOW ÷ 2000 cfm/sq ft
If more than one fan is used divide the
area by the number of fans. This is now the
area of each entrance tunnel.
To determine the inside width of the
supply ducts use the following formula. For
convenience it may be necessary to increase
this value to meet transition widths or "whole"
dimensions.
INSIDE DIMENSION OF SUPPLY DUCT
(ft) = SUPPLY DUCT AREA (sq ft) ÷
DESIRED TUNNEL DEPTH (ft)
STEP 10.
tween bin wall and nearest duct =
GRAIN DEPTH ÷ 4*
STEP 11.
tween ducts = AVE GRAIN DEPTH ÷ 2*
* These are starting values ONLY. Adequate
distribution of ducts may require smaller
distances.
Determine MINIMUM cross-
IMPORTANT!
MAXIMUM distance be-
AVE
MAXIMUM distance be-
9
EXAMPLES
Fan/Heater Application
SITUATION:
1.
2.
3.
4.
5.
6.
On farm aeration of dry soybeans. 42" diameter, 9 rings, NSL series farm bin
with 24" eave height. A flush floor aeration system with one fan will be used.
AVE GRAIN DEPTH, peaked = 24' + (42' /12) = 27.5'
Select 1/10 CFM/BU aeration rate for beans
From the STATIC PRESSURE TABLE for BEANS at 28' (use the next
higher value or approximate) and 1/10 cfm/bu the static pressure is .91" of
water.
.91" water column
Bin capacity, BUSHELS
27.5' x 0.6594 x 42' x 42' = 31988 BUSHELS
Required TOTAL AIRFLOW, CFM
0.1 cfm/bu x 31988 bu = 3199 CFM
From the FAN PERFORMANCE TABLE for vane axial fans, at 1" (0.91")
static pressure and 3500 cfm (closest to 3199 cfm), the appropriate fan would
be a 1.5hp-18"
7.
8.
9.
10.
Number of ROOF VENTS
3500 CFM ÷ 1800 cfm/vent = 1.94, therefore 2 vents
PERFORATED AREA of floor, sq ft
3199 cfm ÷ 30 cfm/sq ft = 106.6 sq ft, minimum
SUPPLY DUCT AREA, sq ft
3199 cfm ÷ 2000 cfm/sq ft =1.60 sq ft, minimum
ID of supply duct for 12" deep tunnel = 1.6 sq ft ÷ 1.0 ft = 1.6 ft or 1.8"
Maximum distance between ducts and binwall = 27.5' ÷ 4 = 6.9'
10
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