Modine Manufacturing PAE 30 Manual

m MOOINE
6-551.23
Part SH70880A (Rev. R)
May 1991
INSTALLATION AND SERVICE MANUAL
gas-fired unit heaters
models PA/PAE and BA/BAE
WARNING: Improper installation,
adjustment, alteration, service or
maintenance can cause property
damage, injury or death, and could
cause exposure to substances which
have been determined by various state
agencies to cause·cancer, birth defects
or other reproductive harm. Read the
installation, operating and maintenance
instructions thoroughly before installing
or servicing this equipment.
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. Don't touch electrical switches.
3. Extinguish any open flame.
4. Immediately call your gas supplier.
FOR YOUR SAFETY
The use and storage of gasoline orother
flammable vapors and liquids in open
containersin the vicinity
of this appliance
is hazardous.
To prevent premature heatexchangerfailure donotlocate
1 ANY gas-fired unit in areas where chlorinated, halogen-
ated or acid vapors are present in the atmosphere.
inspection
on arrival
1. Inspect unitupon arrival. In case of damage, reportimme-
diately
to transportation company and your local Modine
sales representative.
2. Check rating plate on unit and motor to verify that power
supply and motor specification requirements meet avail-
able electric power at the point of installation.
3. Inspect unit received for conformance with description of
product ordered (including specifications where ap-
plicable).
THIS MANUAL IS THE PROPERTY OF THE OWNER.
PLEASE BE SURE TO LEAVE IT WITH HIM WHEN YOU
LEAVE THE JOB.
Figure 1
Models PA/PAE and BA/BAE gas-fired unit heaters
contents
GENERAL INFORMATION
INSTALLATION Page
Special Precautions
............................ 2
Locating Units
................................ 3
Suspending Unit
.............................. 3
Venting
..................................... 4
Piping ....................................... 5
Electrical Connections
.......................... 6
Installing Blower Models ........................ 6
OPERATION
Prior to Operation . . . . . . . . . . . . . . . . . . . . . . . .
..... 9
Lighting Instructions
............................ 9
After Initial Start-up
............................ 9
Pilot Flame Adjustment ......................... 9
Natural Gas Flame Control
...................... 9
Propane Gas Flame Control .................... 10
CHECKING INPUT RATE
Input Adjustment ............................. 10
Manifold Pressure and Gas Consumption .......... 11
Orifice Drill Sizes ............................. 11
DIMENSIONAL DATA ........................... 12
PERFORMANCE DATA
Propeller Models ............................. 13
Standard Motor Data .......................... 13
Filter Pressure Drop, BA Models
................. 14
Blower Nozzles, Performance Data, Blower Models
.. 14
Downward Deflector Hoods, Propeller Models
... 16, 17
Blower Models without Enclosure
................ 18
Blower Models with Enclosure . . . . . . . .
......... 19
Power Codes Descriptions and
Total Unit Power Requirements
............... 24, 25
Control Code Descriptions ...................... 26
SERVICE INSTRUCTIONS
Limit Control ................................ 20
Blocked Vent Safety Switch . . . . . . . . . . . . . . . . . . . . . 20
Burner Removal .............................. 21
General Maintenance ......................... 21
SERVICE DIAGNOSIS .......................... 21
Model & Serial No. Nomenclature ................ 27
MODEL IDENTIFICATION ....................... 27
WARRANTY
........................... Back Cover

installation
SPECIAL PRECAUTIONS
1. Disconnectpower supply before making wiring connections
to prevent electrical shock and equipment damage. All units
mustbe wired strictly in accordancewith wiring diagram fur-
nished with the unit.
2. Turn off all gas before installing unit heaters.
3.
Gas pressure to unit heatercontrols must neverexceed 14 •
W.C.
Testing PipingSystem. The applianceanditsindividualshutoff
valve must be disconnected from the gas supplypiping sys-
temduring anypressuretesting ifthetest pressureisin excess
of'h psi.
The appliance must be isolated from the gas supply piping
system by closing its individual manual shuoff valve during
any pressure testing of the
gas supply system at test pres-
sures equal to
or less than 1 12 psi.
4. Check the gas supply pressure at the unit upstream from
the pressure regulator. For the purpose
of input adjustment,
the minimum supply pressure should be 6" W.C. on natural
gas
or 11" W.C. on propane. The maximum inlet pressure
on natural gasshould be 7" W.C. and 14" W.C. on propane.
Supply pressure with any gas must never exceed 14" W.C.;
if so, install an additional pressure regulator upstream ofthe
combination gasvalve. Purging of
air from gas lines, piping,
and lighting the pilot should be performed as described in
ANSI Z223.1 -Latest Edition National Fuel GasCode (CAN/
CGA-B149
in Canada).
5. All units must be vented to the outside atmosphere. See
page 4 for proper venting instructions.
6. Gas-fired heating equipmentwhich hasbeen improperlyvented,
or which experiences a block vent condition may have flue
gases accidently spilled intothe heated space. See page 20
lor specific information about the blocked vent safetyswitch
supplied on the unit.
7. Do not install in potentially explosive or flammable atmo-
spheres laden with grain dust, sawdust, or similar air-borne
materials. In such applications a blowertype heater installed
in a separate room with dueling to the dust-laden room is
recommended.
8. Installation
of units in high humidityorsaltwater atmospheres
will cause accelerated corrosion resulting in a reduction of
the normal life span of the units.
9. To prevent premature heat exchanger failure do
not locate
ANY gas-fired unit in areas where chlorinated, haloge·
nated or acid vapors are present in the atmosphere.
10. Avoid installing units in extremelydrafty locations. Draftscan
cause burner flames to impinge on heat exchangers which
shortens life. Maintain separation between unitsso discharge
from one unit will not be directed into the inlet of another.
11 .Do not locate units in tightly sealed rooms or smaflcompart-
ments without provision for adequate combustion air and
venting. Combustion air must have access to the confined
spacethrough a minimum oftwo permanentopenings in the
enclosure, one near the bottom. They should provide a free
area of one square inch per 1
000 BTU per hour input rating
of the unit with a minimum of 100 square inches for each
opening, whichever is greater.
©MODINE MANUFACTURING CO.
13. Do not locate unit closer to combustible materials than 6
inchestotop and flue pipe, 18inchesto sides, and 12 inches
to bottom.
14. Allow
at least 6"clearance atthe sides and 12"clearance at
rear to provide ample air for combustion and proper opera-
tion of fan.
15. The minimum distance from combustible material is based
on the combustible material surface not exceeding 160°F.
Clearance from the top of the unit may be required to be
greaterthan 6" if heatdamage, otherthan lire, mayoccurto
materials abovethe unit heateratthetemperaturedescribed.
16. Do not install units below 7 feet measured from the bottom
of the unit to the floor.
17. Modine unit heaters are designed to be used for heating
applications with ambient temperatures between 3~F and
90°F. If an application exists where ambient temperatures
can be expected to fall outside of this range, contact factory
for recommendations.
18. Provide clearance for opening hinged bottom for servicing.
See Figure 2. Do not set unit on its bottom.
19. Toassure thattheflames do not impingeonheatexchanger
surfaces, the unit must be suspended in a vertical and level
position. Failure to suspend unit properly may shorten the
life of the unit heater. ·
20. Do not lift unit heater by gas controls
or gas manifold.
21. Be sure no obstructions block air intake and discharge of
unit heater.
22. Do not attach duct wok, air filters,
or polytubes to any pro-
peller (PAIPAE) model unit heaters.
23.1n aircraft hangars, keep the bottom of the unit at least 10'
from the highest surface of the wingsor engine enclosure of
the highest aircraft housed in ttie hangar and in accordance
with the requirements
of the enforcing authorityand/orNFPA
No. 409, Latest Edition.
24.
In garages or other sections of aircraft hangers such asof-
fices and shopswhichcommunicate
with areas used forservicing
or storage, keep the bottom of the unit at least 7' above the
floor. In public garages, the unit must be installed in accor-
dance with the Standard for Parking Structures NFPA No.
88A and the Standard for Repair Garages NFPA No. 88B.
In Canada, installation of unit heaters in airplane hangars
must
be in accordance with the requirements of the enforc-
ing authority and
in public garages. in accordance with the
current CAN/CGA-B149 codes.
25. Consultpiping, electrical, andventing instructions
in this manual
before installation.
26. All literature shipped with your unit should be kept for future
use for servicing or service diagnosis. Do not discard any
literature shipped with your unit.

installation
In the U.S., the installation of these units must comply with
the "National Fuel Gas Code," .ANSI Z223.1, latest edition
(also known as NFPA 54) and other applicable local building
codes.
In Canada, the installation of these units must comply with
local plumbing or waste water codes and other applicable
codes and with the current code CAN/CGA-B149.1, "Instal-
lation Code for Natural Gas Burning Appliances and
Equipment" or CAN/CGA-B149.2, "Installation Code for Pro-
pane Burning Appliances and Equipment." 1
1. All installation and service of these units must be perform-
ed by a qualified installation and service agency only as
defined in ANSI Z223.1, latest edition, or in Canada by a
licensed gas fitter.
2 . This unit is certified by A.G.A. and C.G.A., with the con-
trols furnished. For replacement parts, submit thecomplete
model and serial numbers shown on rating plate on the
unit. Modine reserves the right to substitute other author-
ized controls as replacements.
3. Unit is balanced for correct performance. Do not alter fan
or operate motors at reduced speed.
4. Information on controls is supplied separately.
5. Modine unit heaters use the same burner for natural and
propane gases.
LOCATING UNIT HEATERS
CAUTION
1. Units must not be installed in. potentially ex-
plosive, flammable or corrosive atmospheres.
In locating units, consider general space-heating requirements,
availability
of gas, and proximity to vent locations. Unit heat-
ers should be located so heated air streams wipe exposed
walls without blowing directly against them. In multiple unit
installations, arrange units
so that each supports the air stream
from another, setting up circulatory air movement in the area.
In buildings exposed to prevailing winds, a large portion of the
heated air should
be directed along the windward wall. Avoid
interference of air streams
as much as possible.
Mounting height (measured from bottom of unit) at which
unit heaters are installed is critical. Maximum mounting
heights for standard units are listed in Table
7. (If optional
outlet devices are used, see mounting height listed in sepa-
rate tables on pages
14, 16 and 17.) The maximum mounting
heightforany unit
is thatheightabove which the unitwill not
deliver heated air to the floor. The maximum mounting
heights must not
be exceeded in order to assure maximum
comfort.
Motors and controls used on Modine unit heaters are
designed to
be used in heating applications with ambient
temperatures between 32° Fand 90°
F. If an applicationexists
where ambient temperatures can be expected
to fall outside
of this range, contact factory for recommendations.
COMBUSTION AIR REQUIREMENTS
Unitsinstalledin tightly sealedbuildings orconfined spaces
should be provided
with two permanentopenings,one near
the top of the enclosure and one near the bottom. Each
opening should haveafree area ofnotlessthan one square
inch per
1,000 BTU per hour of the total input rating of all
units in the enclosure,freelycommmunicating with interior
areas having, in turn,adequate infiltration
from theoutside.
To prevent premature heat exchanger failure do not
locateANY gas-fired unitin areas wherechlorinated,
halogenated
or acid vapors are present in the
,.,trnnC'nhnro
UNIT SUSPENSION
i CAUTION
Do not locate unit closer to combustible materials than
6" to top and flue, 18" to sides, and 12" to bottom of
unit.
Allow at least 12" at the rear of unit to provide ample
air for combustion and proper operation of fan.
Provide clearance for opening hinged bottom for ser-
vicing. See Figure 12, page 13.
Be sure the means of suspension is adequate to supportthe
weight of the unit. For proper operation, the unit must be
installed in a level horizontal position. Clearances to com-
bustibles as specified above must be strictly maintained. Do
not install standard unit heater above the maximum mount-
ing height shown in Table 7
or below seven feet from bottom
of
unit to the floor. (If optional outlet devices are used, see
mounting heightlisted in separatetableson pages
14, 16and
17.)
On all propeller units, exceptthe PAE 300, PA 350 and PA 400,
two tapped holes ('12-13) are located in the top of the unit tore-
ceive ceiling hangers. The PAE 300, PA 350 and PA 400 have
four mounting holes.
On all blower units, except the BAE 300,
BA 350 and BA 400, two tapped holes are provided in the top of
the unit and two holes in the blower support bracket. The BAE
300, BA 350 and BA 400 have fourtapped holes in the topof the
unit
and two in the blower support bracket for mounting. To as-
surethat flames aredirected Intothecenter of heatexchanger
tubes,
unit must be supported In a vertical position, with
suspension hangers "UP": Check with a level. This
is im-
portant.to the operation and life of unit.
NOTE: A pipe hanger adapter kit. shown in Figure 2, is avail-
able as an accessory from Modine. One kit consists of
two drilled W' I.P.S. pipe caps and two 'fz-13 x Pt."
capscrews to facilitate threaded pipe suspension. Two
kits are required for mounting
BAE 50 thru BAE 250
models, models PAE 300, PA 350 and PA 400, and
three kits for models
BAE 300, BA 350 and BA 400.
One kit will pipe mount all other PAE models.
(Threaded Rod Suspension)
(Suspension with Pipe Adaptor Kit)
Figure 2
Suspension methods

i.nstallatian
VENTING CAUTION
Gas Unit Heaters must be vented -do not operate unvented.
A built-in
dr~ft diverter is provided additional external diverters
are not required
or permitted.
Units using single-stage gas controls can
be installed with a
Category I vent system.
Some units which are supplied with two-stage, or modulating gas
controls may require a Category
II vent system. Refer to the
table below to determine the vent category required for each
PNPAE and BNBAE model unit heater.
Gas-fired heating equipment which has been improperly vented,
or which experiences a block vent condition may have flue gases
accidentally spilled into the heated space. See page 20 for spe-
cific information about the blocked vent safety switch supplied on
the unit.
The installation must conform with local building codes
or in the absence of local codes, with the National Fuel
Gas Code, ANSI Z223.1 latestedition, or In canada
CAN/CGA-B149.1 "Installation Code
for Natural Gas
Burning Appliances" and CAN/CGA-B149.2 "Installation
Code for Propane Burning Appliances".
The following suggestions should be observed.
1. Comply with local code venting regulations.
2 Select size of vent pipe to fit opening at rear
of unit (see
page 10 for dimensions}. Do not use a vent pipe smaller
than the vent on the
unit Pipe should be no less than 24-
ga. galvanized steel
or other suitable rust-resistant metal.
Use an approved-type chimney'when the vent passes
through a floor or roof.
3. Keep vent pipe at least 6" from combustible material.
The minimum distance from combustible material is based
on the combustible material surface not exceeding 160°F.
Clearance from the top of the unit may be required to be
greater than 6" if heat damage, other than fire (such as mate-
rial distortion or discoloration} may occur to materials above
the unit heater at the temperature described.
Insulate carefully around section of vent pipe passing
through combustibles. Where vent passes through floor or
roof an opening 4" greater than vent diameter is necessary. If
there is 6' or more of vent pipe in the open space between
the unit heater and where the vent pipe passes through floor
or roof, the opening in the floor or roof need only be 2"
greater than the diameter of the vent pipe.
4. Category I and II unit heaters are defined as having neg-
ative pressure vent systems and must not be common
vented with positive pressure vent systems serving
Category III and IV appliances.
5. Category II vent systems must be installed to prevent
accumulation of condensation
in the vent system, and
shall have a means provided for drainage of vent con-
densate. The drip leg should be cleaned annually.
6. A Category II vent system shall be water tight.
7. Limit vent pipe horizontal runs to 75% of vertical height
with a minimum upward slope from unit of
Y-1" per foot
and suspend securely from overhead structure at points
no greater than 3 feet apart. For best venting, put as much
vertical vent
as close to the unit as possible. Fasten
individual lengths of flue together with metal screws.
8. Keep flue pipes as straight as possible, avoiding sharp
bends. When venting into a common flue, the area
of the
flue should be equal to
or greater than the combined
areas
of the individual vents.
9. Where possible, avoid venting through unheated space.
When necessary, insulate pipe from cold to prevent con-
Page4
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densation and maintain draft head. Provide a drip leg
with a clean out cap at bottom of vertical pipe.
10. Top of vertical stack should extend at least 2~· above
high point
of roof. Use of weather tap will reduce down-
drafts and ,moisture in vent.
11. Use
of dampers or otherdevices in vents are not
allowed.
12. When connecting vent
to existing chimney, do not push
vent pipe beyond internal surface of chimney.
13. For more than one vent into a stack or chimney, they
should enter at different levels.
14.
In general, a common stack or chimney must have an
equivalent cross-sectional area
of all vents entering the
stack.
15. Do not install a gravity vented unit in a common stack
with power exhausted equipment.
16. Do not install gravity vented units in buildings or areas
which experience negative pressure conditions.
Figure 3
Heater Venting USE THtMBL£
THROUGH
CEll lNG
ORIP lEG WITH
ClEAN OUT CAP
Model Number
PAE30
PAEIBAE50
PAEIBAE 75
PAEIBAE 100
PAEIBAE 125
PAEIBAE 145
PAEIBAE 175
PAEIBAE 200
PAEIBAE 225
PAEIBAE250
PAEIBAE300
PNBA350
PNBA400
UHIT
1'·0"
SLOPE ,. .. TO
THE FOOT
Gas Controls
Single-Stage
Two-Stage
Single-Stage
Two-Stage
Modulating
Single-Stage
Two-Stage
Modulating
Single-Stage
Two-Stage
Modulating
Single-Stage
Two-Stage
Modulating
Single-Stage
Two-Stage
Modulating
Single-Stage
Two-Stage
Modulating
Single-Stage
Two-Stage
Modulating
Single-Stage
Two·Stage
Modulating
Single-Stage
Two-Stage
Modulating
Single-Stage
Two-Stage
Modulating
Single-Stage
Two-Stage
Modulating
Single-Stage
Two-Stage
Modulating
Vent Category
I
II
I
II
II
I
II
II
I I
II
II
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-

installation
PIPING
CAUTION
Gaspressure to unit heater controls must neverexceed
14"W.C. .
Testing Piping System. The appliance and its indi-
vidual shutoff valve must be disconnected from the
gas supply piping system during any pressuretesting
if the test pressure is in excess of %psi.
The appliance must be isolated from the gas supply
piping system by closing its individual ma,nual shutoff
valve during any pressure testing of the gas supply
system at test pressures equal to or less than% psi.
1. Installation of piping must be in accordance with local
codes, and ANSI Z223.1-Latest Edition, "National Fuel Gas
Code," or CAN/CGA-8149.1 and .2 in Canada. Do not use
flexible connectors. '
2. Piping to units mustconform with local and national require-
ments for type and volume and gas handled, and pressure
drop allowed
in the line. Refer to Table 4, to determine the
cubic feet per hour (cfh) forthetype
of gasand size of unitto
be installed. Using this cfh value and the length of pipe
necessary,determinethepipediameterfrom Table
1. Where
several unitsareservedbythesamemain,thetotalcapacity,
cfh, and lengthofmain must be considered. Avoid pipe sizes
smaller than '12'. Table 1 allows for the usual number of
fittingswith a0.3" W.C. presuredrop. Wherethegassupplied
gas a specific gravity other than 0.60, apply the multiplying
factor given in Table 2 to the flow capacities in Table 1 to
determine total flow capacity.
3. After threading and reaming the ends, inspect piping
and remove loose
dirt and chips.
table 1 I gas pipe capacities
4. Supportpiping so that no strains are imposedon unit or
controls.
5. Use
two wrenches when connecting piping to unit
controls.
6. Provide a drip pocket before each unit and in the line
where low spots cannot be avoided. (see Figure 4).
7. Take-off to unit should come from top or side of main to
avoid trapping condensate.
8. Piping, subject to wide temperature variations, should
be insulated.
9. Pitch piping up toward unit at least W' in 15' of
horizontal run.
10. Compoundsused on threaded joints of gaspiping must
be resistant to action of liquefied petroleum gases.
11. Purge air before lighting unit by disconnecting pilot
tubingatgas valve. In no caseshouldline be purged into
heat exchanger.
12. After installation, the system must be checked for
leaks. Use soap solution.
13. Install a ground joint union and a gas cock upstream of
the unit for easy servicing of controls, including a
'Ia" NPT
plugged tapping accessible for test gage connection. (See
Figure 4).
14. Allow at least 5 feet of piping between any high
pressure
regulator and unit control string.
15. Testing PipingSystem.Theappliance and its individual
shutoff valve must bedisconnected from the gassupply
piping system during any pressure testing if the test
pressure is in excess of 1h psi.
The appliance must be isolated from the gas supply
piping system by closing
its individual manual shutoff
valve during any pressure testing of the gas supply
system
at test pressures equal to or less than 1h psi.
In Cu. F1. per Hour with Pressure Drop of 0.3 in. W.C. with Specific Gravity 0.60
Length
DIAMETER OF PIPE- INCHES
of Pipe
in Ft. ~
~ I 1
1%
15 76
218
440 750
I
30
73
152
285
590
45
44
124
260
435
60 50
105 190
400
!
j
75
97
200
345
;
90
88 160 320
105
80
168 285
120
158
270
150
120
242
180
128
225
210
i
205
240 190
270
I
178
300 170
450 140
600
119
table 2 I specific gravity conversion
factors
Multiplying factors to be used with Table 1 when 1he
specific gravity of gas IS other than 0.60.
NATURAl GAS PROPANE GAS
Specific Factor Specific Factor
Gravity Gravity
0.55 1.04 I 1.50 0.633
0.60 1.00 1.53 0.626
0.65 I 0.962 1.60 0.612
1~
2
1220
2480
890 1650
700 1475
610 1150
545
1120
490
930
450
920
420
860
380
710
350 720
320
660
300
620
285 580
270 545
226
450
192
380
3
6500
4700
3900
3250
3000
2600
2450
2300
2000
1950
1780
1680
1580
1490
1230
1030
GAS
SUPPLY LINE
4
13880
9700
7900
6800
6000
5400
5100
4800
4100
4000
3700
3490
3250
3000
2500
2130
6
38700
27370
23350
19330
17310
15800
14620
13680
12240
11160
10330
9600
9000
8500
7000
6000
GROUND
JOINT
UNION
"-,
\
MIN. PLUGGED
I GAGE CONNECTION
8
79000
55850
45600
39500
35300
32250
29850
27920
25000
22800
21100
19740
18610
17660
14420
12480
'j \'ii' NPTTEST
Figure 4
Pg~l:'r:T Recommended piping to controls
Page 5

installation
WIRING GENERAL
CAUTION
Disconnect power supply before making wiring connec-
tions to prevent electrical shock and equipment damage.
ALL UNITS MUST BE WIRED STRICTLY IN ACCOR-
DANCE WITH WIRING DIAGRAM FURNISHED WITH
UNIT.
ANY WIRING DIFFERENT FROM WIRING DIAGRAM
MAY BE HAZARDOUSTO PERSONS AND PROPERTY.
Anydamageto orfailureof Modine unitscaused byincor-
rect wiring of the units is not covered by MODINE'S
STANDARD WARRANTY (see Back Cover).
All field installed wiring must be doneinaccordancewiththe
National Electrical Code ANSI/NFPA 70- Latest Edition or
Canadian Electrical Code CSA C22.1 Part 1 or local codes.
Unitmustbeelectricallygroundedaccording
to thesecodes.
See wiring diagram shipped with unit. For optional wiring
diagrams
see Bulletin 6-430.
The power to these unit heaters should be protected with a
fused disconnect. Units for use with three-phase electric
powermustbe provided with amotorstarterhaving properly
sized overload protection.
Location of thermostat should
be determined by heating
requirements and be mounted on
an inside wall about 5'
abovefloorlevel ... where it will not be affected by heatfrom
the unit or other sources, or drafts from frequently opened
doors.
See instructions packed with thermostat.
INSTALLATION OF BLOWER MODELS (BAIBAE UNITS)
CAUTION
Proper airflow anddistribution,acrosstheheatexchanger
mustbe provided
to preventearlyfailure of theblower unit
heater.
ATTACHMENT OF FIELD INSTALLED DUCTWORK,
BLOWER
BA MODELS ONLY
CAUTION
Do not attempt to attach ductwork of any kind to propeller
PA/PAE models.
Burned-outheatexchanger,
or definitelyshorterequipment
life, will result from
not providing uniform airdistribution.
Insufficient air, or poor air distribution across the heat
exchanger will cause early failure
of the blower unit heater.
When installing heater,alwaysfollowgooddl.lctdesign prac-
ticesforeven distribution of theairacrosstheheatexchanger.
Recommended layouts are shown below. When installing
blower units with ductwork, the following must be done.
1. Provide uniform air distribution overthe heat exchanger.
Use turning vanes where required. See figures below.
2. Provide removable access panels in the ductwork on the
downstream side
of the unit heater. These openings
should be large enough
to view smoke or reflect light
inside the casing to indicate leaks in the heat exchanger
and
to check for hot spots on exchanger due to poor air
distribution or lack
of sufficient air (cfm).
3. Ifductworkis connected totherear ofthe unit, use Modine
blowerenclosure kit,
or if using field designed enclosure,
maintaindimensionsofproperblowerenclosure
as shown
on page
13.
CAUTION
Check for red heat exchanger tubes. If bottom of tubes
become
red while blower unit is in operation, check for
proper air volume and air distribution. Adjust blower
speed orcorrectdischargeductdesign
to correct problem.
RECOMMENDED INSTALLATIONS
B
Dimension "B" Should Never
Be Less than 'h of "A"
TURNING
VANES
3"MIN.
Page6
A
12" MIN.
SIDE VIEW
D
SIDE VIEW
c
SIDE VIEW
TOP VIEW
E F
SIDE VIEW
TOP VIEW

installation
INSTALLATION OF BLOWER MODELS (BAIBAE UNITS)
Determining Blower Speed
The drive assembly and moto~ on all gas-fired blower unit
heaters are factory assembled. The adjustable motor pulley
has been pre-set
to permit operation of,this unit underaver-
age conditions
of air flow and without any external static
pressure. The motor pulley should
be adjusted as required
when theunitis tobe operated atotherthan averageairflows
and/or with external static pressures. Adjustment must
always be within the performance range shown on pages 18
and 19 and the temperature rise range shown on the unit's
rating plate.
To determine the proper blower speed and drive pulley set-
ting, the conditions under which the unit
is to operate must be
known. Ifthe blower unit is to be used withoutductwork, nozzles
or filters, the only criteria for determining the pulley setting
and blower speed is the amount of air
to be delivered. The
performance tables for blower models are shown
on pages
18 and 19. As an example, a model BA 350 unit, operating in
a free blow mode, that is, no duct work, filters, etc., and is to
deliver an airvolume of 4537 cfm (cfm=cubic feet of air) requires
that the unit
be supplied with a 11 12 hp motor, a C23 drive and,
the drive pulley must
be set at 2 turns open to achieve a blower
speed of 625 rpm (see performance table for unitswithoutblower
enclosure, page 18). See "Blower Adjustments" for setting of
drive pulley turns open.
If a blower unit is to be used with ductwork and/or filters,
nozzles, etc., the total external static pressure under which
the
unit is to operate, and the r.equired air volume must be
known before the unit can be properly adjusted. Any device
added externally to the unit, and which the air must pass
through, causes a resistance
to air flow. This resistance is
called static pressure loss. The total of the external static
pressure losses must be determined before adjusting the
blower speed.
If Modine filters are used, the expected pressure drop
through the filters can be determinedfrom the pressure
drop
curves shown on page 14. If Modine supplied discharge
nozzles are used, the expected pressure
drop of the nozzles
can be found footnoted at the bottom of page
14. If filters,
nozzles, or ductwork is to be used with the unit, and theyare
not supplied by Modine, the design engineer
or installing
contractor must determine the pressure drop for the exter-
nally added devices, or ductwork, to arrive at the total static
pressure under which the unit
is to operate.
Once the total static pressure, and the required elm (air volume)
are known, the operating speed ofthe blowercan bedetermined
and the correct drive pulley adjustments made. As an example,
if a model BA 350 is to be used with a Modine supplied blower
enclosure, Modine supplied filters, and
is attached to ductwork
supplied by others, and the unit
is to move 4537 elm of air, the
filter pressure drop would be approximately 0.78" W.C. (from
filter pressure drop curves
on page 14). Assuming the ductwork
has been designed for a 0.15" W.C. pressure drop, the total
external static pressure the unit
is to operate against would be
0.78" W.C. +0.15" W.C. or 0.23" W.C. Entering the performance
table
on page 19 (units with blower enclosure) for a BA 350, at
4537 cfm and 0.3" W.C. static pressure, it is seen that the unit
will require a 2 hp motor using a C19 drive, and the drive pulley
should
be set at a '12 turns open to achieve a blower speed of
785 rpm. See "Blower Adjustments" for setting of drive pulley
turns open.
To Install (Figure 6):
1. Remove and discard the motor tie down strap and the
shipping block beneath the adjustable foot
on the motor
base. (Not used on all models.)
TRANSFORMER
Figure 5
Blower Model Installation
2. Adjust motor adjusting screw for a belt deflection of ap-
proximately
'I• with five pounds of force applied midway
between the sheaves (refer to Figure
Sa). Since the belt
tension will decrease dramatically after
an initial running
period, it is necessary to periodically re-check the tension
to assure continual properbeltadjustment.Exeessive tension
will cause bearing wear and noise.
3. The blower bearings are lubricated for life; however,
before initial unit operation the blower shaft should be
lubricatedat the bearings with SAE20oil. This will reduce
initial friction and start the plastic lubricant flowing.
4. Make electrical connections according to the wiring
diagram.
5. Check rotation of the blower. Motor should be in clock-
wise rotation when facing motor pulley.lf rotation is incor-
rect, correction should be made by interchanging wiring
within the motor.
See wiring diagram on the motor.
6. The actual current draw of the motor should be deter-
mined. Under
no condition should the current draw
exceed that shown on the motor rating plate.
7. ItIs the installer's responsibility to adjust the motorpulley
to provide the specified blower performance as listed on
pages 18 and 19, for blower settings different from the
factory set performance. The drive number on the
unit
may be identified by referring to the Power Code number
on the serial plate
of the unit (see page 27 for model
number nomenclature) and matching that number with
thoseshown on page 25. From the listingthe drivenumber
can be determined.
8. Blower sheave and motor sheave should be measured to
assure correct drive is on unit. Refer
to page 25 for drive
sizes.
Page 7

installation
BLOWER ADJUSTMENTS
Following electrical connections, check blower rotation to
assure blow-through heating. If necessary, interchange wir-
ing
to reverse blower rotation. Start blower motorand check
blower sheave RPM with a hand-held or strobe-type tach-
ometer.
RPM should check out with the speeds listed in
Performance Data shown on pages
18 and 19 according to
the job specifications. A single-speed motorwith an adjusta-
ble motor sheave is supplied with these units. If blower fan
speed changes are required, adjust motorsheave
as follows:
1. Shut..off power before making blower speed adjust-
ments. Referto Determining Blower Speed on page7and
to Blower Drive Selection on pages
18 and 19 to deter-
mine proper blower
RPM.
2. Loosen motor base and take belt off of motor sheave.
3. Loosen set screw on outer side of adjustable motor
sheave (see Figure 6).
4. To reduce the speed of the blower, turn outer side of
motor sheave counterclockwise.
5. To increase the speed of the blower, turn outer side of
motor sheave clockwise.
PageS
TOWARD MOTOR
..
Figure6
ADJUSTABLE HALF
OF SHEAVE
Motor Sheave Adjustment
6. Retighten motor sheave set screw, replace belt and
retighten motor base. Adjust belt tension adjusting screw
such that there is 3
!4" belt deflection when pressed with
5 pounds of force midway between the blowerand motor
sheaves (see Figure 6a). Since the belt tension will
decrease dramatically after an initial run-In period, it
is necessary to periodically re-check the tension to assure
continual proper belt adjustment.
7. Check to make certain motor puiiE!y and blower sheave
are aligned. Re-align if necessary.
8. Re-check blower RPM after adjustment.
NOTE: Do notfire unituntilbloweradjustmenthas been
made
or unit may cycle on limit (overheat) control.
9. Check motor amps. Do not exceed amps shown on
motor nameplate. Slow blower if necessary.
10. Check air temperature rise across unit. Check tempera-
ture rise against values shown in Performance Tables on
pages
18 and 19 to assureactual desired airflow is being
achieved.
11. If adjustments are required. recheck motor amps after
final blower speed adjustment.
Figure 6a
'%" DEFLECTION
WITH 5# FORCE
Belt Tension Adjustment

operation
CAUTION
Start-upandadjustmentproceduresshowld be performed
by a qualified serviceman.
Gas pressure to unit heater controls must never exceed
14" W.C. When air pressure testing piping systems for
leaks, be surethattest pressuredoes notexceed 14" W.C.
if unit heaters arealready installed. Check the gas supply
pressureatthe unitupstreamfrom the pressure regulator.
Forthe purposeofinputadjustment, theminimumsupply
pressure should be 6" W.C. on natural gas
or 11" W.C. on
propane. The maximum inlet pressure on natural gas
should be 7" W.C. and 14" W.C. on propane. The
pilot
flame must be adjusted as described on page 9. Supply
pressure with any gas must never exceed 14" W.C.; if so,
install an additional pressure regulator upstream of the
combination gas valve. Purging of airfrom gas lines, pip-
ing, and lighting the'pilot should be performed
as de-
scribed in ANSI
Z223.1.- Latest Edition "National Fuel
Gas Code" (CAN/CGA-8149 in Canada).
Be sure no obstructions block draft diverter or air intake
and discharge of unit heater.
PRIOR TO OPERATION
Although this unit has been assembled and fire-tested atthe
factory, the following pre-operational procedures should be
performed to assure proper on-site operation:
1. Ensure that the electricity supply is off.
2. Check burner(s) to insure properalignment.
3. Check fan clearance. Fan should not contact casing
when spun by hand.
4. Check all electrical connections to be sure they are
secure.
5. Check that all horizontal deflector blades are open a
minimum of 30°
as measured from vertical.
LIGHTING INSTRUCTIONS (ALSO ON UNIT)
For Unit w/Standing Pilot
1. Turn off power. Turn thermostat down. Close manual
main gas valve and wait 5 minutes.
2. Open manual pilotvalve. Depresssafety reset whilelight-
ing and hold for 1 minute.
3. Open manual main gas valve. Turn on power. Set ther-
mostat at desired setting.
For
Unit wllntermittent Pilot
1. Turn off power. Turn thermostat down. Close manual
main gas valves and wait 5 minutes.
2. Open all gas valves. Turn on power.
3. Set thermostatat desired setting. (Pilotand main burner
will light automatically when thermostat calls for heat).
Shut Down Instructions
Turn off power and close all gas valves.
AFTER INITIAL START UP
1. Check pilot flame adjustment as shown below.
2. Check gas piping for leakswith asoap bubblesolution to
insure safe operation.
3. Check gas input rate, as described on next page, to
assure adequate gas volume and pressure.
PILOT FLAME ADJUSTMENT
The pilot is orificed to burn properly with
an inlet pressure of
6"-7" W.C. onnatural gasand 11"-14" on propanegas, butits
pressure cannot
be easily measured. Therefore, adjust pilot
valve
to give a soft steady flame %" to 1" long and encom-
passing
%" to %" of the tip of the thermocouple.
3/4" to 1"
318" to 1/2"
j
Figure 7
Correct pilot flame
Normally, this flame will produce satisfactory thermocouple
output.
To adjust flame, use pilot adjustment screw on control
valve. If the pilot flame is longer and larger than shown by
Figure 7
it is quite possible that it will impinge on the heat
exchanger header causing burnout.
If line pressures higher
than 6"-7" W.C. on natural gas are anticipated orexperienced,
it is recommended that apressure regulator be installed upstream
of the unit heatergas control valve. Ashortflame, while pressure
is constant, indicates a dirty pilot orifice or pilot valve. A weak
pilot flame causes poor burner ignition and can reduce ther-
mocouple output enough to shut off gas supple. Pilot flame
condition should
be observed periodically to assure trouble-
free operation.
MANUAL MAIN GAS VALVE
(ALSO
MANUAL PILOT VALVE AND SAFETY RESET FOR STANDING
DEPRESS TO RELIGHT
STANDING PILOT
PRESSURE
REGULATOR
ADJUSTMENT
Figure 8
Typical gas valve
NATURAL GAS FLAME CONTROL
Control of burnerflames on unit heaters utilizing natural gas
isachieved by resetting the gas manifold
to eitherincreaseor
decrease primary combustion air. Prior to flame adjustment,
operateunitwith casing bottom closedforaboutfifteen min-
utes. Operation can be viewed after loosening and pushing
aside the blue gas designation disc on rear of unit.
Page 9

operation
Lack of primary air will cause soft yellow-tipped flames.
Excess primary air produces short, well-defined flames
with a tendency to lift
off the burner ports. Proper operation
with natural gas provides a soft blue flame with a well-
defined inner cone.
To increase primary air, loosen the manifold mounting
screws and tap the manifold away
from the mixer tubes
until yellow-tipped flames disappear. See Figure 14. To
decrease primary air move the manifold closer to the
mixer tubes until flames
no longer lift from burner ports,
but being careful not to cause yellow tipping. Retighten
mounting screws after adjustment.
PROPANE GAS FLAME CONTROL
Adjustable primary air shutters are attached to the orifices
on the gas manifold for units equipped for propane gas
operation. See Figure 15. An optimum flame will show a slight
yellow tip. Prior to flame adjustment, operate unit heater with
casing bottom closed tor
at least fifteen minutes. Then lower
hinged bottom
and adjust primary air shutters. Loosen wing
screws
and push shutters forward to reduce primary air until
yellow flame tips appear. Then increase primaryair until yellow
tips diminish and aclean blue flame with a well-defined inner
cone
appears. It may also be necessary to adjust the manifold
position to obtain proper
flame. Follow the instructions under
"Natural Gas Flame Control" for adjusting the manifold.
checking input
rate
CAUTION
Check the gas supply pressure at the unit upstream from
the pressure reQulator. For the purpose of input
adjustment, the
mmimum supply pressure should be 6"
W.C. on natural gas or 11" W.C. on propane. The
maximum inlet pressure on natural gas should be 7" W.C.
and 14" W.C. on propane. The pilot flame must be
adjusted as described on page 7. Supply pressure with
any gas must never exceed 14" W.C.; 1f so, install an
additional pressure regulator upstream of the
combination
gas valve. Purging of air from gas lines,
piping,
and lighting the pilot should be performed as
described in ANSI Z223.1-Latest Edition "National Fuel
Gas Code" (CAN/CGA-8149 in Canada).
Important -Supply pressure and manifold pressure
must be checked with unit in operation when making final
adjustments.
INPUT ADJUSTMENTS
Gas pressure regulators are adjusted at the factory for
average gas conditions. It is important that gas be
supplied
to the heater in accordance with the input rating
stamped on the serial plate. Actual input should be
checked and necessary adjustments made after the
heater is installed. Over-tiring, a result
of too high an
input. reduces the life of the unit. increases maintenance,
and lowers efficiency. Under
no circumstances should
the input exceed that shown on the rating plate.
Input can be determined by the meter-timing method
provided other gas equipment connected to the meter is
inoperative
during the test ... or by checking manifold
pressure.
(A) Meter Timing Method
1. Shut off all other gas-burning equipment, including
other pilot lights served by the gas meter.
Page 10
2. Start the heater and determinethe number of seconds
it takes
to consume 1cu. ft. of gas. Two basic formulas
are useful:
where
F1 =3600 CIT
F2 F1/C
F1 ::input to heater. Btuh.
F2 =input to heater, cu. ft. per hr.
C =calorific value of gas. Btu per cu. ft.
T =time to consume 1 cu. ft. of gas in sec.
The calorific value
of gas may be determined from the
local
utility or gas dealer.
These are representative values:
GAS Btu per cu. ft.
Natural 1000- 1150
Propane 2500
3. If the seconds for 1 cu. ft. are more (input less) than
shown
on Table 4 for model being tested, remove the
cap from the pressure regulator and take one
clock-
wise turn at a time on the adjustment screw until the
correct time is obtained. If the seconds are less (input
greater) than indicated in the table
follow the same
procedurein acounter-clockwisedirection.Neverremove
adjustment screw from regulator.
Ifthe correct number of seconds cannot be obtained with-
out exceeding the limitations given above. then re-orificing
is necessary. Correct orifices can be obtained from Modine
Manufacturing Company, Racine, Wisconsin. When
requesting orifices, state type
of gas, Btu content. and
its specific gravity. Also give model numberof unitheater.
For example,
if the input to the heater is 100.000 Btuh
and the calorific value
of gas is 1000 Btu per cu. ft., then,
by the second formula, the input is 100 cu. ft. per hr.
Table 3 indicates the time
for one revolution of various
size meter dials with various
input rates. If a 1cu. ft. meter
dial is used. we proceed down the cu. ft. column
to 100
cu. ft. per hr. and then horizontally to the left to determine
a time
of 36 seconds for one revolution of the dial. See
Table 3 similarly, if the 1/2 cu. ft. dial is used, we deter-
mine a time of 18 seconds for one revolution at the
required input.
(B) Pressure Method
The pressure method determines
input by measuring the
pressure of the gas in the manifold in inches
of water.
1. Determine orifice si"~e from Table 4 and check actual
orifice size(s) in unit.
2. Close manual gas valve.
3. Remove the 1/8" pipe plug in automatic valve and
attach water manometer
or "U" tube which is at least
12" high.
4. Open manual valve and start unit.
5. If pressure as indicated by "U" tube is not more than
1/2" higher or lower than indicated in Table 4, adjust
regulator
as described under "Meter-Timing Method,"
Step 3 above.
If pressure as indicated by "U" tube is more than 1/2
inch higher
or lower than indicated in Table 4, -:heck
main line gas pressure at unit. Adjust main gas regu-
lator to supply 6 to 7 inch W.C. pressure to unit regu-
lator on natural gas and
11 "-14" W.C. on propane gas.

checking input rate
"U"TUBE
MANOMETER
3.5W.C. FOR
NATURAL GAS;
10''
W.C. FOR
PROPANE
GAS AT
MANIFOLD
LIGHTING
INSTRUCTI
& RATING
PLATE
GAS
DESIGNATION
PLATE
PILOT SUPPLY
TUBE
Figure 9
ECO (ON UNITS
SO EQUIPPED,
SEENOTE50N
PAGE 16.)
JUNCTION
BOX
Checking input rate with manometer
table 3 /meter-timing gas
Time required for one revolution is charted for various size
meter dials and various rates of gas input in cu. ft. per hour.
To convert
to BTUH. multiply by the heating value of the gas
used.
Time lor 1
Input, Cu. Ft. per Hour, When Meter
Revolution,
Dial Size Is:
Sec.
Y:t eu. 11.
1 eu. 11.
2 eu. lt.
5 eu. lt.
10 180 360 720
1800
12
150 300
600 1500
14 129 257 514 1286
16 112 225 450 1125
18 100 200 400
1000
20 90
180 360
900
22
82
164 327 818
24 75 150
300 750
26 69 138 277 692
28
64
129 257 643
30 60
120 240
600
35
51
103 206 514
40 45
90 180 450
45 40
80 160
400
50 36 72
144
360
55 33 65 131
327
60
30
60 120 300
70
26 51
103 257
80 22
45
90 225
90
20
40
80 200
100 18 36
72 180
120 15 30
60 150
table 4 I manifold pressure
& gas consumption*
Models
BTU/Cu.Ft. Natural Propane
Specific
Gravity
1040 2500 No.
of
0.06 1.53 Orifices
Manifold Press. ln.W.C. 3.5 10.0
Cfh 28.8 12.0
PAE30 GaiJHr. Propane .33 1
Sec./cu. 11. 125 300
Orifice Drill Size 37
52
Cfh 48.0 20.0
PAESO Gai./Hr. Propane -.55 1
BAESO Sec./cu.
11.
75 180
Orifice Drill Size 29
44
Cfh 72.0 30.0
PAE75 Gai./Hr. Propane .82 2
BAE75
Sec./cu. 11.
50 120
Orifice Drill Size 32
49
Cfh 101.0 42.0
PAE 100 GaL/Hr. Propane -1.15 2
BAE100
Sec./cu. 11.
36 86
Orifice Drill Size 29 44
C!h 124.0 52.0
PAE125
Gai./Hr. Propane 1.43 2
BAE125
Sec./cu. II. 29 67
Orifice Drill Size 25 42
Cfh 144.0 60.6
PAE145
GalJHr. Propane 1.64 3
BAE 145 Sec./cu. II. 25 60
Orifice Drill Size 30 45
Cfh 163.5 68.0
PAE 175 Gai./Hr. Propane -1.86 3
BAE 175 Sec./cu.
ft. 22
53
Orifice Drill Size 27 43
Cfh 192.0 80.0
PAE200
Gal./Hr. Propane -2.19 3
BAE200
Sec./cu. 11. 19 45
Orifice Drill Size 23 40
Cfh 216.0 90.0
PAE225
Gai./Hr. Propane -2.47 4
BAE225
Sec./cu. 11. 17 40
Orifice Drill Size 28 43
Cfh 240.0 100.0
PAE250 Gai./Hr. Propane 2.74 4
BAE250
Seclcu. 11.
15 36
Orifice Drill Size 25 42
Cfh 288.0 120.0
PAE300
Gai./Hr. Propane 3.29 5
BAE300
Sec./cu. fl. 12 30
OrifiCe Drill Size 26 42
Cfh 337.0 140
PA350 Gal.!Hr. Propane 3.84 5
BA350 Sec./cu. fl.
11
26
Orifice Drill Size 21 39
Cfh 385.0 160
PA400
GaiJHr. Propane -4.38 6
BA400
Sec./cu. fl. 9 23
Orifice Drill Size 23 40
•Above gases based
on average standards. Units can be furnished for
gases of different values and specific gravities. (GaiJHr. based on 60"F.
30•
Hg., 91,500 BTU/Gal.) In Canada, refer to rating plate on side of unit
for orifices at high anitude.
table 51 orifice drill sizes with decimal
equivalents
MAIN BURNER ORIFICES PILOT ORIFICE SIZES (INCHES)
Drill Pilot Type Natural Propane
Size J640DHA .015 .010
52 .1160 J993DHW 0.18 .010
49 .1285
45 1360
J994DHW
0345
.018 .011
5CHL-6 .018 .010
44 .0860 .1405 5SL-6ER .018 .010
43 .0890 27 .1440
42 .0935 26 .1470
40 .0980 25 '1495
39 .0995 23 .1540
Figure 10
37 .1040
21 .1590 Dials of Typical Gas Meter
Page 11

dimensional data
table 6 I gas-fired propeller & blower unit heaters
Figu~e 11
Dimensions
(In inches)
Minimum recommended installation clearances
from top and'rear (motor) 6". sides 18".
Clearance at bottom should equai"C" dimension
for each model number.
Dimension
PAE30 PAE50
PAE75
Symbol
BAE50 BAE75
A 127 la
171 1.
191 14
B 24'1. 28'1. 28'1.
c 143 14
20 20
D 10'1·· 1413 116
16 "I••
E
13
16 16
F 87
la
11'/,
11 'h
G 1'1a
2'1• 25
la
H
9'1•
13
5
la
155 la
AA 6'1. 6'1. 6'1·
BB
6'/,
6'/,
6 •;,
J(j)
4 4 5
K®
'h-13 'h-13 'h-13
Gas Connections <il
'h 'h 'h
w - - -
X ---
Model
PAE30 PAE50 PAE75
L® 181 12 24 27
Fan Diameter 9 12 14
Approx. Weight 58# 102# 116#
BAE50 BAE75
M®
-37'1· 403
14
N®
-143
la
17 1 1a
0 -5'1· 5'1.
p -22 25
QHgt.
-17 17
VWidth -175
la
21
Duct Conn._l R Hgt. -155 la
155 1a
Inlet of FilterI
Rack TWidth
-16 193
1.
Center to Center
Blower Mtg. Holes S -10"1,. 13'1,.
Std. Mtr. Pulley Dia. ® -3 3
Std. Blower Pulley Dia. -9 10
Blower Wheel Dia.
-8 9
Approx. Weight -146# 158#
Model Number
PAE 100 PAE 125 PAE 145 PAE 175 PAE200
BAE 100 BAE 125
BAE 145
BAE 175 BAE200
21 21
23'/,
25'1a
25'1a
35'1· 35'1. 35'1. 40'1• 40
'I•
22 22 22 25 25
18'1,. 18'1··
21 •;,. 23'1,. 23'1··
20 20 20 24 24
12'/, 12
'h
12'/,
14 'h 14'/,
33 la 33 la
33 la 4'1a 4'1a
17 3 la 17 3 la
197 la
22 22
8 8 8 9 9
7'1· 7'1· 7'1. 7'1. 7'1.
6 6 7 7 8
'h-13 'h-13 'h-13 'h-13 'h-13
'h 'h
'h 'h
'h
-----
- - ---
PROPELLER MODELS ONLY
PAE 100 PAE 125 PAE 145 PAE 175
PAE200
31 '1,
31
1
12 32
35 35
16 16 18 20 20
156# 156# 169# 231# 231#
'
BLOWER MODELS ONLY
BAE 100 BAE 125 BAE 145 BAE 175 BAE200
46'1· 46'1· 47'1·
52
3
la
52
3
la
21
21
21 24 'I. 24'1.
7'1• 7'1· 7'1.
8'/,
8'/,
30 30 30 34 34
21
3
la
21
3
la
21
3
la 25 25
29 29 29 34 34
20 20 20 23'1. 23'1.
27 1 /,
27 1 /, 27 1
/, 32'1. 32'1.
173 la
173 la
173 la
20
3
1a 203 1a
3 3 3 3 3
15 13 9 13 12
13 13 13 15 15
215# 215# 231# 307# 307#
PAE225 PAE250
PAE300
PA350
PA400
BAE225 BAE250
BAE300
BA350 BA400
28 'Ia 28 5 la
33
5
la
33
5
la
40
40'1• 40'1· 40'1· 40'1. 40'1•
25 25 25 25 25
26 '1,. 26 'I•• 31'1,. 31'11· 37 1
/,
24 24 24 24 24
14
•;,
14 •;,
---
4'1a 4'1a
4'1• 4'1. 4'1.
25 25 30 30 36 3
1a
9 9 9 9 9
7'1· 7'1• 7'1• 7'1•
7~1.
8 8 9 10 10
'h-13 1
12-13
'h-13 1
12-13
'h-13
'h 'I. 'I• 'I. 'I.
- - 5 5 5
--16 16 16
PAE 225
PAE250 PAE300 PA350 PA400
35 37 38
3
la
38
3
la 42'1,
22 22
22 22
24
243# 261#
359# 359#
435#
BAE 225 BAE250 BAE300
BA350 BA400
523 la 52
3
la
52
3
la 523 la
58'/,
24'1· 24'1• 18 18 22
8'12
8'/,
81 12 81 12 B'h
34 34 36 36 36
25 25 25 25 25
34 34 44'1a 44'1a 44'1•
235 la
235 la
23'1a
235 la 23 5 la
32'1· 32'1.
42
7
la
42
7
la 42
7
la
20
3
1a 20
3
la
20
3
la
20'1a
20
3
la
3 3 3 3
4'12
9 8 8 8
11
15 15 15 15 15
331# 331# 420# 420# 490#
(j) Diameterof round vent pipe to fit oval opening. All single stage units require a Category I vent system. Models PAE 30 thru PAE 100 with two stage gas controls require a category II vent system.
@ For natural gas.
@ This is an approximate dimension for standard motors, allow 3" for sheave adjustment and optional motors.
@ PAE 30thru PAE 250-2 holes
BAE 50 thru BAE 250 and PAE 300, PA 350, PA 400- 4 holes
BAE 300, BA 350, BA 400- 6 holes
@ On blower units L=C+P is distance from front of un~ to back of blowerenclosure, and minimum distance to wall.
@ Distance between mounting hole in unit casing and mounting hole on blower, except on BAE 300, BA 350 and BA 400. Then distance from rear mounting hole in casing.
(£) Motor pulley is adjustable.
Page 12

performance dat:a
table 7 I propeller type unit
BTU/Hr.
B~/fl,~·
CFM@ o~m,. ::u~~~m Heat Throw I Standard Motor Data@
Model Input
OUtput
(j) (j)
-· Vol •. Hg<.(F<f .... ~ps RPM Type
PAE 30 30,000 24,300 • " 7 "
.. , <550
Sh. Pole
PAE 50 50,000 40,500
51 7 17 1.3 1550 Sh. Pole
PAE 75 75,000 60,750 50 9 23 1/30 2.3 1550 Sh. Pole
PAE100 100,000 80,000
51 9 23 1/30 2.3 1050 Sh. Pole
PAE125 125,000 100,000 I 5o 12
3o 1/15 2.1 1o5o Sh. Pole
PAE145 145,000 116,000 2400 893 46 14 36 1/6
3.1
1075 PSC
PAE175 175,000 140,000 2500 713 52
11
29 116 3.1
1075 PSC
PAE200 200,000 160,000 3000 852 49
14
35 116 3.1 1075
PSC
PAE225 225,000 180,000 3300 832
51 14
35 116
3.1
1075
PSC
PAE250 250,000 200,000 4100 1024 45 18 46 113
' 5.7 1075
PSC
PAE300 300,000 ' 240,000 4400 960 51
16 42
113
I 5.7 1075
PSC
PA 350 350,000 '269,500
4400 975 57 20 I
65 1/2 7.5 1075
PSC
PA 400 400 000 304 000 5300 995 I 53 20 65
112
! 7.5 1075 PSC
(j) Note: Ratings shown are for elevations up to 2,000 ft. For elevations above 2,000 feet. ra1ings should be reduced at the rate of 4% for each 1,000 feet
above sea level. (Does not apply in Canada- see Rating Plate.)
DO NOT USE PROPELLER UNITS WITH DUCT WORK.
® Data listed isfor standard 115-volt, 60-Hertz, single-phase motors.
® At 65•F ambient and unit fired at fuU rated input. Mounting height as measured from bottom of unit.
table 8 I standard blower motor data <D
MODEL NUMBER
BAE50
BAE75 BA 100 BAE 125 BAE145
BAE 175
BAE200
HP
'I•
'I•
'I•
'I•
'I•
'I•
'lo
Amps (@ 115 volt) G)
5.4 5.4 5.4 5.4 4.6 5.4 4.6
RPM 1725 1725
1725 1725 1725
1725 1725
Type
Split Split Split Split Split Split Split
Phase. Phase Phase Phase Phase Phase Phase
(j) Data listed is for standard 115-volt, 60-Hertz, single-phase motors.
Figure 12
Hinged Bottom for Burner Service
*(See Dimension "C" Table 6, page 10)
BAE225 BAE250 BAE300
BA350 BA400
'lz
3/4
1 1
'"
8.5
11
13.4 13.4
1725
1725
Split Split
Phase Phase
T
T
Page 13

performance data
Inlet filters • Performance
The application of Modine filter kits require the addition of a
blower enclosure kit, therefore, to determine filter resistance.
select unit sizeand Cfm fromtable on page 13. Enterchart below
atcorresponding Cfm (top
of chart for 0~ 1000 Cfm -bottom of
chart for 1000-10,000Cfm) and proceed up or downvertical line
to a: point where it intersects the diagonal line for the unit
selected. Move to the leftedge of chartand read filter resistance.
1.00
.90
.80
.70
.60
.50
.40
.30
fL
ff .20
0
·W
0::
:::l
(/)
(/)
w
g: .10
~ .09
0 .08
~ .07
~ .06
(/) .05
w
:I:
u .04
z
~ .03
a..
<J
.02
.0
1
CFM X 100 FOR MODELS BAE-50, BAE-75, BAE-100
1" FILTER RESISTANCE
I I v
v
J
li , , J
, J , I
, , I
i/
1/
/ 'I
) ll / I J
1/
ll I I I
v~AE? v I
1/
BAE-50 _I [I
J BAE-300
BAE-100 BA-350
BAE-125 BA-400
BAE-145 BAE-175
BAE-200
BAE-225
BAE-25~
4 5 6 7 8 9 10 20 30 40 50 60
CFM X 100 FOR MODELS BAE-100 THROUGH BA-400
Nozzles • Performance
A choice of four air discharge nozzles
{above)
accommodate various heat
throw patterns illustrated on the facing
page. Equipped with adjustable
louver blades, nozzles are fabri-
cated from galvanized steel and
are offered either unpainted or
painted to match the finish of
the blower unit heaters. Noz-
zles
are flanged for easy
attachment over the
discharge opening of
blower unit heater.
40° DOWNWARD
NOZZLE
40° SPLITTER
NOZZLE
s
J
./
Nozzle performance* mounting height, heat throw, heat spread (in feet)
NOZZLE
MODEL NUMBER
TYPE
BAE-50 BAE-75 BAE-100 BAE·125 BAE·145 BAE·175 BAE-200 BAE-225 BAE-250 BAE-300 BA-350 BA-400
40•
tMax. Mounting Ht (ft.) H 14 16 18 22
21 24 27 24 26 28 32 32
Downward
Heat Tnmw (ft.) T
41
49 54 66 63 72 81 71
78 83 96 96
Nozzle
Heat Spread (ft.) S
14
16 18 22 21 24 27 24 26 28 32 32
goo
tMax. Mounting Ht. (ft.} H 15 17 18 22 22 21 24 24
26 28 32
32
Vertical 15 17 18 22 22
21
24 24 26 28 32
32
Nozzle
Heal Sp<ead (II.} S
tMax. Mounting Ht. (ft.} H --16 20
'20
21 24 \
21
23 26 30 32
40"
Splitter Heat Thmw (ft.) T - -
41
50 49 52 59 53 58 65
75
80
Nozzle
Heal Spread (ft.) s -
81
100 97 104 117 106 116 129
151
160
5-way
tMax. Mounting Ht {ft.} H -15 18 17
18
20 20
21
20 23 26
Nozzle
Heat Spread (lt.J S --
21
26 24 25 28 27 30 27 32 37
• The above table is based on an inlet air temperature 70'F and an air temperature rise of 55'F. Air defleCtors on. 40• and 90' discharge nozzles set perpendicular to !he face of the air disCharge open-
ing. On 5-wey noules al air defleCIOI'$ set perpendiCular to floor. Static pressure measured at 0.1" W.C. for 90' nozzle, 0.2' W.C. tor 40' downwan:l and 5-way noule, and 0.3" W.C. for 40' splitter nozzle.
Outlet velocities are approximately 1750 FPM for the 40' nozzles, 1000 FPM!orthe 90' nozzle, and 1300 FPM lor 5-way. For motor size, drive and blower rpm refer to peges 12 and 13.
t Mounting height measured from bottom ot unit.
Page 14

performance data
90° VERTICAL
NOZZLE
5-Way
Nozzle
Dimensions (in inches)
NOZZLE DIMENSION
TYPE SYMBOL BAE·50 BAE·75
40° A --
Downward B --
Nozzle c --
D --
A 14'%.
16''X.
900
B 16
16
Vertical
23'h
21}.1
Nozzle c
D 4
3'h
40" A
14'o/,, 16'o/,,
B
16 16
Splitter c
15 17
Nozzle D 6 6
A
14':Y,,
16''!1.
s-way B
16 16
Nozzle c
22 24
D
12
13
I.
40°
Downward Nozzle
900
Vertical Nozzle
MODEL NUMBER
BAE·100 BAE·125 BAE-145 BAE-175 BAE-200 BAE-225
18'lle
18~.
21}{,
23:X.
23'Xe 26'Xe
20 20 20 24
24 24
34'h 34'h
33'h 40 40 40'h
11 11 11
12X
14
14
18~. 18~.
21)1(,
23%
23%.
26:Y,,
20 20 20 24 24 24
26
26 25
30 30 30
4 4 4 4
5'h
5:0
m=1='"'
23% 23'Xe 26o/.e
20 24
24 24
23 29 29
30
8
10
10 10
"''mi
23:Y,,
23:Y,.
26o/.o
20 0 24
24
24
25''11• 8% 30% 30% 33%
14 15
16
16
17
5-Way
Nozzle
BAE-250 BAE-300
26~.
31~
24
24
40'h
47'h
14 20
26:Y,,
31~
24 24
30 36
5:0 10:0
26o/.o
31!;;
24
24
BA-350 BA-400
31~ 37~
24 24
47'h 48
20 20'h
31~
37'h
24 24
36 36
10'h
10'h
31!i 37:0
24 24
30
WI
10
26'Ko
'
24 4
33%
.
17 9
Page 15

performance dat:a
Performance Data -30° and 600 Downward Deflector Hoods -Propeller Models
Mounting
300
Height to Downward PROPELLER MODELS (j)
(See Figures A and B)
Bottom Deflector
of Heater Hood
Model PAE50
PAE75 PAE 100 PAE 125 PAE 145 PAE 175 PAE200 PAE225 PAE250
PAE300 PA350
PA400
X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X y z X Y Z X Y Z
8' 7 13 15 9 23 27 9 21 25
11 28 34 14 36 42 11 27 32 13 34 40 13 33 39
17 44 52 15 40 47 15 44 62 16 48 67
10' 6 10 12 9 20 24 9 18 21 11 28 32
14 36 42
11 26 30 13 33 39
13 33 39 17 44 52 15 40 47 15 44
61 16 48 67
12'
---
12 13 15
---
11 25 30
14 35 41 11 23 27 13 32 38
13 32 37 17 44 52 16 39 46 15 43 60
16 48 66
14'
---
---
---
11 20 24 14 33 39 10 21 24 13 30 35 13 29 35
17 43 50 16 38 45 14 40 57
16 46 64
16'
---
--- ---
---
14 30 35 9 15 17 13 25 30 13 25 29
17 41 49 16 36 43 14 37 52
16 43 61
18'
---
--
--- --
13 22 26
--- --- --
17 39 46 16 33 39 14 36 48 16
39 55
20'
---
---
---
--
---
---
---
---
17 35 42 15 30 35 13
31 42 15 39 51
22'
---
---~--- --
1---
--- ---
---.
---
14 26 30 12 23 32 14 31 47
Mounting
60"
Height to
Downward PROPELLER MODELS (j)
(See Figures A and B)
Bottom Deflector
ofHeater Hood
Model PAESO PAE75 PAE 100 PAE 125 PAE 145 PAE175 PAE200 PAE225 PAE250 PAE300
PA350 PA400
X Y Z X Y Z X y z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X y z X Y Z X Y Z
t 0 32 451
8' 0 13 16 0 20 25 0 19 23 0 25 31
0 31 38 0 23 29 0 29 36 0 29 35 0 37
47 0 34 42 0 29 41
10' 6 10 12
0 20 24 ' 0 18 22 0 25
31
0 31 38 0 23 29 0 29 36 0 29 35 0 37 47 0 34 42 0 29
41 0 32 45
12'
---
0 16 20
---
0 24 30 0
31 38 0 23 28 0 29
36 0 29 35 0 37 47 0 34 42 0 30 42 0 31 44
14'
---
---
--0 22 28 0 30 38 0 18 23 0 28 35 0 28 35 0 37 47 0 34 42 0 27 39 0 30 43
16'
---
---
---
---
0 29 37
---
0 26 33
0 26 32 0 37 46 0 33 42 0 27 39 0
30 43
18'
--- --- ---
--0 26
32
---
--
---
0 37 46 0 33 41
0 26 39
03043'
20'
---
---
--- ---
-- - -
---
---'03644 0 32 39 1 o 25 35 0 27 42
22'
--
--- - -
---
---
--
---
-- ---
---
0 23 35 0 27 38
24'
---
--- ---
---
--- ---
-- ---
---
---
0 21 32 0 24 34
26'
--- --- ---
--- ---
---
--- ---
---
--- ---
0 22 31
CD Data based on umts fired at lull rated mput and w1th an entenng a1r temperature oi80"F.
30° HOOD FIGURE A 60"
HOOD
THROW-FLOOR COVERAGE
FIGURE B
Page 16

performance data
Performance Data -30°, 600 and 90° Downward Deflector Hoods -Blower Models
' '
Mounting 30•
Height to Downward BLOWER
MODELS® (See Figures A and B)
Bottom Deflector
of Heeter Hood
Model
BAE50 BAE75 BAE 100 BAE 125 BAE 145
BAE175
BAE 200 BAE225 BAE250
BAE300
BA350
X Y Z X y z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z
8' 8 6 7 I 8 18 22 8
18 22 10 24 29
10 26 30 10 25 29 11 28 33 12 30 35
13 33 38 14 35 41
13 40 55
10'
---
i7
14 16 7 14 16 10
23 217 10 24 29 10 23 27 11 27 32 12 29 34 13 32 38 14 35
41 13 40 55
12'
--
6 8 10
---
9 18 21
10 21 25 10 19 23
11 25 30 12 27 32 13
31 36 14 34 40 13 37 52
14'
--
---
--
---
9 17 20 8 13 16 11 20 23 11 23 27
13 28 33 14 32 38 13 34 48
16'
1---
---
---
__ _;_
--- --- --- ---
12 23 27 14 29 34
12 32 43
18'
--- --- --- ---
--- ---
--- ---
---
12 19 23 11 28 39
Mounting 60"
Heightto eo-&rd
BLOWER MODELS® (See Figures A and B)
Bottom Deflector
of Heater Hood
Model
BAE50
BAE75
BAE 100
BAE 125 BAE 145 BAE175 BAE200 BAE225 BAE250 BAE300 BA350
X Y Z X Y Z X Y Z X V Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z
8' 0 9 11
I o 11 21
0 17 21
0 21 27 0 23 28 0 22 27 0 25 30 0 26 32 0 28 35 0 30 37 0 26 38
10'
---
! 0 15 19 0 15
19 0 21 26 0 22 28 0 22 27 0 25 30 0
26 32 0 28 35 0 30 37 0 24 38
12'
---
7 12 15
---
0 19 24 0
21 27 0 20 25 0 24
30 0 25 31
0 28 35 0
3037
0 23 37
14'
---
---
__:.... __
---
0 19 24 0 16 21 0 22 27 ! 0
2429
0 27 34 0 30 37 0 23 37
16'
---
---
---
---
---
---
--- ---
0 25 31
0 29 36 0 24 35
18'
--- ---
--
--
--- ---
--
---
---
0 24 30 0 23 33
20'
---
---
---
--- ---
--- ---
--
---
--
0 20 30
Mounting
911"
Height to
Downward
BLOWER MODELS® (See Figures C and D)
Bottom Deflector
of Heater
Hood
Model
BAE50 BAE75
BAE100 BAE 125 BAE145 BAE 175
BAE200 BAE225 BAE250 BAE300 BA350
s s s s s s s s s s s
a·
12
18 I 20 27 H 29 34 I
:=
42 47
=~ :~
10' 10
16 17 24 26
31
' 37 42
I
12'
9
15 16
22 23 ! 28
30
34 38 43
14' -
14 15 20 i 22
22 26 28
32 35 41
16' --14
19 21 20 I 24 26 30 33 39
18'
-- -
18 19 I 19 23 24
28 31 37
20' -! -
18
! 18 22 23 27 I 30 35
22' -- - I -I -
21
22
~
28 33
24' -- - - I I ---i 27
31
26' - - - - - : -26 29
28' --- - I - - I --l - - 27
I
® Data based on units fired at full rated input, 8o•F entering air temperature, and a 6o•F temperature rise through unit
go• HOOD
FIGUREC
FIGURED
f
H
J
BA400
X Y Z
13 39 54
13 39 54
13 36
51
13 33 47
13 32 42
11 24 39
BA400
X Y Z
0 26 38
0 25 37
0 25 37
0 24 37
0 23 36
0 23 31
0 20 28
BA400
! s
47
45
43
41
39
37
35
33
31
29
27
Paae 17

performance data
table 9 I blower models, without blower enclosure <D ® ®@ ®
<D Shaded area indicates unit standard motor and drive nmge.
(2J For unit operation in non-shaded area; specify on order optional motor and drive number.
® Ratings shown are tor elevations up to 2,000 feet. For elevations above 2,000 teet, ratings should be reduced at the rate of 4% tor each 1 ,000 feet above sea level. (Does not apptl
in Canada-see rating plate.)
® Pulley turns open are approximate. For proper operation, check blower rpm.
liD RPM and pulley settings shown in bold type, in shaded areas tor 0.0 static pressure on page 12, Indicate factory settings of standard drives.
® In Canada, output is 77% of input.
<1! Mounting heights and throws lor BAIBAE models, wllhout duct work or nozzles, and at cfm's yielding a 55' temperature are the same as those listed on page 11 lorequivalent sized
PAIPAE models.
Page 18

performance data
table 10 I blower models, with blower enclosure <D ® ® ® ®
Model Input Output Temp Air Outlet
No. Btu/Hr. Btu/Hr. Rise- Flow Velocity
•f Cfm Fpm
40 938 616
45 833 553
50 750 502
BAE50 50.000 40,500 55 682 460
60 625 425
65 sn 396
70 536 371
40 1406 813
45 1250 729
50 1125 662
55 1023 607
60 938 561
865 522
804 489
1875 786
1867 705
1500 840
1364 567
60 1250 542
65 1154 505
70 1071 473
40 2315 970
45 2056 870
50 1852 790
55 1684 724
60 1543 669
65 1425 623
70 1323 584
0.0 Stelle Pressure ®
Pully
Drive
Turns
Hp No. Open
1.5
2.5
14 C5 3
4
13>
1
10
!4
l!
C101
2
C33
IJ>
C105
C16
!4
C16
C16
IJ> C23
515 C16
460
455 2 C19
1M
C23
111 C26
<il Shaded area indicates unn standard motor and drive range.
0.1 Stelle Pressure
Pully
Drive Tums
Hp No. Open
0
1
1.5
% C5 2
2.5
3
3.5
14
C90
lO
C94
C16
!4
C16
\j
C16
~
110
!4
!4
*
2
Ill
"
<2> For un~ operation in non-shaded area, specify on order optional motor and drive number.
0.3 Stelle PI'Msure
" C95
J< C94
1lf
.C23
0.4 Stelle Pressure
11 C96
]&
C95
* C95
ll C36
ll C38
C105
C16
C16
C16
C108
C106
C107
C107
2 C19
1J>
C23
C16
2 C19
Pully
Tums
Open
1.5
3
4
0
2
5
1
2
3
0
0.5
1.5
0
0
1.5
2.5
3.5
0
1
2
<ll Ratings shown are torelevations up to 2,000 teet. For elevations above 2,000 teet. ratings should be reduced at the rate ot4% for each 1,000 feet above sea level. {Does not
apply in Canada see rating plate.)
® Pulley turns open are approximate. Forproper operation, check blower rpm.
ISJ RPM and pulley settings shown inbold type, in shaded areas tor 0.0 static pressure on page 12, indicate factory settings of standard drives.
® In Canada, output is 77% of input.
\l! Mounting heights and throws for BAIBAE models, without duct work or nozzles, and at elm's yielding a 55• temperature are the same as those listed on page 11 for equivalent
sized PAIPAE models. Page
19

service instructions
ALUMINIZED
STEEL DRAFT
OIVERTER
FAN &
FAN GUARD---
LIMIT CONTROL
MAIN
BURNER---
ADJUSTABLE
AIR DEFLECTOR
BLADES
Figure 13
Cross-section of propeller type unit
LIMIT CONTROL (OVERHEAT SWITCH)
The limit control, mounted on the left inner side panel (when
facing front of unit), will shut off the gas supply to the main
burner in the event of overheating. It is a single pole single-
throw switch. This limitcontrol should operate only when something
is seriously wrong with the unit. Anytime this control operates,
correct the difficultyimmediately
or serious damage may result.
If the limit control cuts off the gas supply during normal operation:
1. See that front louvers are open and that there are not any
obstructions
in the air inlet or discharge outlet.
2. Check actual input to unit against rated input.
3. Check to be sure motor is operating
4. Check that fan is not loose on motor shaft. On blower units
check belts and pulleys for tightness or damage.
5. Check fan speed (on propeller units) against speed on mo-
tor nameplate. On blower units check blower speed against
Tables 9 or 10; check for restrictions in ducts and for dirty
filters.
6. Check to make sure the venting system is not damaged or
blocked. Also check to
be sure unit is venting normally and
that there
is not negative pressure in the building adversely
affecting draft.
7. Clean heat exchanger tubes inside and out if necessary.
8. If items 1-7 do not solve the problem, check limit control
and replace if necessary. The control isaccessible by removing
the left outer side panel, held in place by screws at the rear
of the unit.
Page 20
IMPORT
ANT NOTE:
The limit control (overheat switch) on this unit heater will
shut off the gas should excessive discharge temperatures
occur. Do
not attempttocontrolthefan with the limitcontrol.
Any change in wiring to attempt to control the fan with
the limit control will result in hazardous conditions and
void the warranty.
BLOCKED VENT SAFETY SWITCH
A blocked vent safety switch is supplied on all gravity-vented
unit heaters and is designed to prevent operation of the main
gas burner if the venting system is blocked.
If the blocked vent switch has tripped, turn off the gas and
electric supplyto the unit heater. Check the entire vent system
connected to the unit heater for blockage or damage.
After the vent system has been cleared, or if
no blockage or
damage is found
in the vent system, the blocked vent switch
may
be reset. To reset the blocked vent switch. remove the
access cover
in the top panel of the unit heater and depress
the reset button located on the switch.
With the switch reset, turn
on the electric and gas supply to
the unit heater and restart the unit. Carefully observe the op-
eration of the unit to assure that it is operating correctly. If the
block vent switch does not allow the unit to function, or trips
after the unit has operated for a period of time, call a qualified
service agency to service the equipment. Do
not attempt to
bypass the blocked vent safety switch. Do not attempt to
replace a defective blocked vent switch with any switch
other than that supplied by the unit heater manufacture.