Reznor AB225 Installation Manual
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Installation, Operation & Spare Parts Manual for
Gas Fired Air Curtain
Obsoletes Form I-A C (1-16)
Form I-A C (2-16)
APPLIES TO:
Models AB 175 and AB 225
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury, death, or
property damage.
Be sure to read and understand the installation, operation, and service instructions in
this manual.
Improper installation, adjustment, alteration, service, or maintenance can cause
serious injury, death, or property damage.
— Do not store or use gasoline or other ammable vapors and liquids in the vicinity
of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Leave the building immediately.
• Immediately call your gas supplier from a phone remote from the building. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the re department.
— Installation and service must be performed by a qualied installer, service agency,
or the gas supplier.
Form I-A C (2-16), Page 1
TABLE OF CONTENTS
1.0 General ................................................................. 2
1.1 Cautions and Warnings .................................... 2
1.2 General Information .......................................... 3
1.3 Warranty ........................................................... 3
1.4 Installation Codes ............................................. 3
2.0 Receiving, Uncrating and Preparing for Installation .. 3
3.0 Air Curtain Location ............................................ 4
4.0 Dimensions, Clearances & Features.................. 4
4.1 Dimensions ....................................................... 4
4.2 Combustible Clearances .................................. 5
4.3 Features ........................................................... 5
5.0 Position and Mounting ........................................ 6
5.1 Single Air Curtain .............................................. 6
5.2 Multiple Air Curtains ......................................... 6
5.3 Adjusting of Air Outlet Louvers ......................... 7
6.0 Mechanical ........................................................... 8
6.1 Gas Piping and Pressures ................................ 8
6.2 Venting ........................................................... 10
7.0 Electrical and Wiring ......................................... 13
7.1 Wiring ............................................................. 13
7.2 Typical Unit Wiring Diagram ........................... 13
7.3 Burner Controls .............................................. 14
8.0 Pre Startup Check, Adjustment, Startup & Shut-
down ..................................................................................14
8.1 Pre Startup Check .......................................... 14
8.2 Gas Connection Check .................................. 14
8.3 Gas Piping Check ........................................... 14
8.4 Gas Pressure Adjustment Procedure ............. 15
8.5 Vacuum Setting Check ................................... 16
8.6 Lighting Sequence .......................................... 16
8.7 Startup ............................................................ 16
8.8 Shutdown ....................................................... 16
9.0 Trouble Shooting ............................................... 17
10.0 Spare Parts ....................................................... 19
11.0 Service .............................................................. 20
INDEX ........................................................................ 22
INSTALLATION RECORD ........................................ 23
1.0 General
1.1 Cautions and
Warnings
Denitions of Hazard
Intensity Levels
used in this Manual
There are warning labels on the unit, on the front page and throughout this manual.
For your safety, comply with all warning during installation, operation and service of
this system. Denitions of the hazard intensity levels of the cautions, warnings and
dangers are shown below.
HAZARD INTENSITY LEVELS
1. DANGER: Failure to comply will result in severe personal injury or
death and/or property damage.
2. WARNING: Failure to comply could result in severe personal injury
or death and/or property damage.
3. CAUTION: Failure to comply could result in minor personal injury
and/or property damage.
WARNING
Gas-red appliances are not designed for use in hazardous atmospheres containing
ammable vapors or combustible dust, in atmospheres containing chlorinated or
halogenated hydrocarbons, or in applications with airborne silicone substances.
WARNING
Should overheating occur, or the gas supply fail to shut off, shut off the manual gas valve
to the appliance before shutting off the electrical supply.
WARNING
Do not use this appliance if any part has been under water. Immediately call a qualied
service technician to inspect the appliance and replace any gas control that has been
under water.
Form I-A C (2-16), Page 2
1.2 General
Information
1.3 Warranty
This manual includes installation, operation and spare parts information. Before
beginning any procedure, carefully review the information, paying particular attention
to the warnings. If you do not have knowledge of local requirements, check with the
local agencies who might have requirements concerning the installation. Become
familiar with the requirements of your particular installation and make preparations for
necessary supplies, equipment and manpower.
These air curtains are ONLY for indoor applications designed to operate at an
ambient temperature range between 5°F (-15°C) to 86°F (30°C).
Never place or rest anything, especially ladders against the air curtain.
The installation instructions in this manual apply to Gas Fired Air Curtain Models
AB 175 and AB 225.
Refer to limited warranty information on the warranty form in the “Literature Bag”
shipped with this unit.
If an extended warranty form applies, keep the extended warranty information for
future reference and verication of warranty.
Warranty is void if:
a) The wiring is not in accordance with the diagram furnished with this unit.
b) The unit is installed without proper clearances to combustible materials
c) Unauthorized replacement parts are used.
1.4 Installation
Codes
California Warning
Label
Massachusetts
Requirements
2.0 Receiving,
Uncrating and
Preparing for
Installation
The units contained in this manual are design-certied to ANSI and CSA standards
by ETL. These models are approved for installation in the United States and in
Canada.
The units are approved for use with either natural gas or propane. The type of gas
for which the air curtain is equipped and the correct ring rate as shown on the rating
plate attached to the unit.
Electrical characteristics are shown on the unit rating plate.
These units must be installed in accordance with local building codes. In absence
of local codes in the United States, the unit must be installed in accordance with the
National Fuel Gas Code NAPA/ANSI Z223.1a (latest edition) or CAN/CSA-B149.1
and B149.2. (See Paragraph 1). These codes are available from CSA Information
Services 1-800-463-6727. Local authorities having jurisdiction should be consulted
before installation is made to verify local codes and procedure requirements.
If this system is being installed in the state of California, the installer MUST attach the
California warning label on the outside of the heat section access panel.
The California Warning label, P/N 196977, is shipped in the “Literature Bag”.
Select a dry, clean location on the heat section access panel and adhere the label.
If this system is being installed in the Commonwealth of Massachusetts, it must be
installed by a licensed plumber or licensed gas tter.
This unit was inspected and test operated at the factory prior to crating and was in
operating condition. If the unit was damaged in shipment, document the damage
with the transporting agency and contact your distributor. If you are an authorized
distributor, follow the FOB freight policy procedures.
Check the rating plate for the correct gas specications and the electrical
characteristics of the unit to insure that both utilities are compatible to with the gas
and electric services specic to the installation site.
Read this manual and become familiar with the installation requirements of your
particular unit. If you do not have knowledge of local requirements, check with the
gas company or other local agencies that may have requirements concerning this
installation.
Form I-A C (2-16), Page 3
3.0 Air Curtain
PLAN VIEW
Location
Check the supporting structure to be used to verify that it has sufcient load-carrying
capacity to support the weight of the air curtain assembly.
The air curtain assembly must be level and comply with the clearances as shown in
Figure 2.
CAUTION: Do not locate the air curtain where it may be exposed
to water spray, rain or dripping water.
4.0 Dimensions,
Clearances &
Features
4.1 Dimensions
FIGURE 1 - Dimensions - inches/mm
Approximate Net Weight
Size 175 225
Weight - lbs
Weight - kg
408 507
185 230
F
E
Model
AB 175
AB 225
C
A
FRONT VIEW
RIGHT HAND VIEW
H
J
Gas Connection
B
G
K
Electrical Connection
L
Refer to Photo in Section
A
4.3 for actual features not
shown in PLAN VIEW
A
inch/mmB inch/mmC inch/mmD inch/mmE inch/mmF inch/mmG inch/mmH inch/mmJ inch/mmK inch/mmL inch/mm
68-7/8”
1750
88-9/16”
2250
37-3/8”
950
37-3/8”
950
18”
457
18”
457
27-9/16”
700
27-9/16”
700
32-5/16”
820
32-5/16”
820
4-7/8”
125
4-7/8”
125
67-5/16”
1710
87”
2210
45-1/4”
1149
45-1/4”
1149
14”
356
14”
356
3-5/16” 8414-5/8”
371
3-5/16” 8414-5/8”
371
D
Form I-A C (2-16), Page 4
FIGURE 2 - Dimensional Clearances
Gap to be kept
to a minimum
4.2 Combustible
Clearances
Door
Outside
Bottom of air curtain
to be level with top
of door opening
6’- 0” (1.8m)
minimum
For safety and convenience, provide clearances as shown in the following table.
Clearance to combustibles is dened as the minimum distance from the heater to a
surface or object that is necessary to ensure that a surface temperature of 90°F above
the surrounding ambient temperature is not exceeded. Minimum clearances are also
listed on the heater rating plate.
Service Side Opposite Service Side Front Top Bottom Flue
Minimum Clearances to Combustibles - ALL Models
inches 18 6 3 18 36 6
mm 457 152 76 457 914 152
4.3 Features
No Feature
1 Main power cable
1
2 Gas supply line
3 Combustion air inlet
4 Limit control sensor
5 Vacuum line
6 Venter motor
2
6
3
4
5
Form I-A C (2-16), Page 5
5.0 Position and
Mounting
Determine the position of the air curtain with regard to clearances, venting, gas
supply connection, gas pressure, electrical supply connection and working height
consideration.
Air curtain units are supplied with mounting brackets pre-tted as either a single or
multiple units which can be bolted together for various door widths.
Refer to FIGURE 2 for minimum working height considerations.
5.1 Single Air
Curtain
5.2 Multiple Air
Curtains
Each single air curtain should be supported by cantilever brackets (not supplied) then
xed to the building structure by bolting directly using suitable support brackets or by
suspending from above using suitable steel work as shown in FIGURE 3 below.
FIGURE 3 - Mounting of Single Air Curtain
Cantilever brackets
(not supplied)
Factory fitted mounting
brackets
FRONT VIEW
Multiple air curtains should be bolted together using 3 sets of 3/8-16 bolts, nuts and
washers tted through the existing holes in the factory provided mounting brackets
and then through the holes in the support channels (not supplied).
Form I-A C (2-16), Page 6
WARNING
Hardware must be positioned along the full length in the top of the
factory provided mounting brackets to insure proper load conditions.
The unit can now be directly attached to the building trusses by using suitable support
brackets or by suspending the unit from overhead steel work as shown in FIGURE 4.
FIGURE 4 - Mounting of Multiple Air Curtains
Support points
Air Curtain
Unit 1
Typical support channels (not supplied)
PLAN VIEW
If required, the support channels may be extend slightly past the ends of the air
curtains units to aid in fastening.
Factory fitted brackets
(supplied)
Air Curtain
Unit 2
WARNING
Mounting of Multiple Air Curtains may require larger support
channels to insure proper support of heavier loads.
5.3 Adjusting of Air
Outlet Louvers
To adjust the air outlet louvers:
• Loosening two hex head bolts at each end of the unit (total of four) as shown
below.
Button Head Socket
Cap Screws
Hex Head Bolts
• Loosen the two button head socket cap screws that lock the louvers in position.
(Note: two pair on Model AB 225 & one pair on Model AB 175) as shown.
• Now move the louvers to desired position and retighten all bolts / screws.
Form I-A C (2-16), Page 7
6.0 Mechanical
Models
Technical
Specications
Gas type
Gas connection
Max supply pressure (i.w.c.)
Min supply pressure (i.w.c.)
Gross heat input (BTU)
Gross heat output (BTU)
Number of orices
Orice size (mm)
Manifold pressure (i.w.c.)
Flue nominal diameter
Temperature rise (°C)
Temperature rise (°F)
Venter Fan
Voltage
RPM
Current
Capacitor
Air Distribution Fans
Type
Speeds
Number of fans
Maximum air volume (CFM)
Voltage
Power rating (per fan)
AB 225 AB 175
Natural Propane Natural Propane
1/2”NPT
14.0
5.0 / 12.0
225,000 175,000
180,000 140,000
5
3.3 1.85 2.9 #51 drill
3.5 10.0 3.5 10.0
6”
-5.0 / -2.8 -3.3 / -1.1
23 / 27 26 / 30
120 V / 60 Hz
3,400
1.7 A
10 mfd (370 Vac)
Direct Drive Centrifugal - 1/3 hp
2
4 3
6,170 4,320
230 V / 60 Hz
550 Watts
6.1 Gas Piping
and Pressures
Sizing a Gas
Supply Line
Form I-A C (2-16), Page 8
WARNING
This unit is equipped for a maximum gas supply pressure of 1/2
psi, 3.5 kPA or 14 inches water column. Supply pressure higher
than 1/2 psi requires installation of an additional lockup-type
service regulator external to the unit.
Capacity of Piping - Cubic Feet per Hour based on 0.3" i.w.c. Pressure Drop
Specic Gravity for Natural Gas -- 0.6 (Natural Gas -- 1000 BTU/Cubic Ft)
Specic Gravity for Propane Gas -- 1.6 (Propane Gas -- 2550 BTU/Cubic Ft)
Length
of
Pipe
20'
30'
40'
50'
60'
70'
80'
90'
100'
125'
150'
175'
200'
1/2" 3/4" 1" 1-1/4" 1-1/2" 2"
Natural Propane Natural Propane Natural Propane Natural Propane Natural Propane Natural Propane
92 56 190 116 350 214 730 445 1100 671 2100 1281
73 45 152 93 285 174 590 360 890 543 1650 1007
63 38 130 79 245 149 500 305 760 464 1450 885
56 34 115 70 215 131 440 268 670 409 1270 775
50 31 105 64 195 119 400 244 610 372 1105 674
46 28 96 59 180 110 370 226 560 342 1050 641
43 26 90 55 170 104 350 214 530 323 990 604
40 24 84 51 160 98 320 195 490 299 930 567
38 23 79 48 150 92 305 186 460 281 870 531
34 21 72 44 130 79 275 168 410 250 780 476
31 19 64 39 120 73 250 153 380 232 710 433
28 17 59 36 110 67 225 137 350 214 650 397
26 16 55 34 100 61 210 128 320 195 610 372
Note: When sizing supply lines, consider possibilities of future expansion and increased requirements.
Refer to National Fuel Gas Code for additional information on line sizing.
Diameter of Pipe
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