Blodgett AB2A Installation Manual
Since 1848
INSTALLATION INSTRUCTIONS FOR
AB2A VENTILATION SYSTEM
FOR BLODGETT DOUBLE DECK MT3870
COMPUTERIZED CONVEYOR OVEN
LISTED
BLODGETT OVEN COMPANY
A Division of
G. S. BLODGETT CORPORATION
50 Lakeside Avenue, Box 586, Burlington, Vermont 05402 USA Telephone (800) 3315842, (802) 8603700 Fax: (802)8640183
PN M9519 (3/98)
1998 - G.S. Blodgett Corporation
TABLE OF CONTENTS
Delivery and Inspection Page 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation Page 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning and Maintenance Page 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Page 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Flow Measurement Page 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AGENCY APPROVALS
The InVent Hood Systems are Listed by Underwriters Laboratories Inc. (UL) in category YYCW as Exhaust Hoods Without
Exhaust Dampers. They are intended to be installed in accordance with NFPA 96, the Standard for Ventilation Control and
Fire Protection of Commercial Cooking Operations. The basic Standard used by UL to investigate products in this category
is UL 710, the Standard for Exhaust Hoods for Commercial Cooking Equipment.
These hoods are considered to be Type 1 according to the International Mechanical Code (IMC); that is, they are, installed
at or above all commercial food heatprocessing equipment that produces grease vapors or smoke." IMC is published by
the International Code Council, Inc. and is compatible with codes written by the Building Officials and Code Administrators
International, Inc., (BOCA), the International Conference of Building Officials (ICBO), and Southern Building Code Congress
International, Inc. (SBCCI). The Uniform Mechanical Code (UMC) published by ICBO defines a Type I Hood as, a kitchen
hood for collecting and removing grease and smoke." A Type II Hood is a general hood for collecting and removing steam,
vapor, heat or odors." The hood type is determined by the intended use. UL tested and approved the InVents for use in the
Type I environment.
These Hoods are NSF approved to ANSI/NSF21992, Food Equipment
corrosion resistant. Furthermore, that there be no sharp corners or open seams where food, residue or soil collect.
Page 1
. ANSI/NSF21992 requires that all materials used be
DELIVERY AND INSPECTION
Upon arrival of your AB2A ventilator, inspect the crate for damage and inform the shipper if necessary. Carefully unpack the
unit and match the parts to the list below.
Item Blodgett P/N Qty Description
A AB2AA 1 AMU/Exhaust Manifold
A1 AB2AA1 1 AMU Duct Extension
A2 AB2AA2 1 Exhaust Duct Extension
A3 AB2AA3 1 Top Exhaust Enclosure Bracket, Left
A4 AB2AA4 2 Exhaust Duct Ceiling Trim
A5 AB2AA5 2 AMU Duct Ceiling Trim
B AB2AB 1 AMU Support Bracket, Right
C AB2AC 1 AMU Support Bracket, Left
D AB2AD 1 Lower Front AMU Plenum
E AB2AE 1 Middle Front AMU Plenum
F AB2AF 1 Upper Front AMU Plenum
G AB2AG 2 Filter Trough/Receptacle
H1 M9500 2 Filter,10x16"
H2 M9501 2 Filter, 10 x 20"
J AB2AJ 1 Vertical Exhaust Manifold, Left
K AB2AK 1 Cooling Fan Exhaust Enclosure
L AB2AL 1 Upper Top End Enclosure, Right
L1 AB2AL1 1 Lower Top End Enclosure, Right
L2 AB2AL2 1 Upper Heat Sheild, Right
M AB2AM 1 Lower End Enlosure, Right
M1 AB2AM1 1 Lower Heat Shield, Right
N AB2AN 1 Upper Top End Enclosure, Left
N1 AB2AN1 1 Lower Top End Enclosure, Left
N2 AB2AN2 1 Upper Heat Shield, Left
P AB2AP 1 Lower End Enclosure, Left
P1 AB2AP1 1 Lower Heat Shield, Left
Q AB2AQ 1 Hardware Bag (includes the following)
Q1 M9519 1 Installation Instructions
Q2 M0652 4 1/4"20 Lock Nut
Q3 M0222 8 1/4"20 x 1/2" Hex Head Screw
Q4 R1417 1 1/4"20 Shoulder Bolt
Page 2
Item Blodgett P/N Qty Description
Q5 M9509 1 1/4"20 x 1/2" Thumb Screw with Shoulder Washer
Q6 M3828 2 Stacking Pins
Q7 653 12 1/4" Flat Washer
Q8 M6315 3 #1024 x 1/2" Slotted Hex Head Screw
R AB2AR 3 Oven Securing Clip
S AB2AS 1 Mounting Bracket (Rev. A)
S1 AB2AS1 1 Mounting Bracket (Rev. B)
T AB2AT 1 Vertical Exhaust Manifold, Right
[G]
[P1]
[A4]
[A5]
[A3]
[N1]
[N2]
[A2]
[P]
[A]
[N]
[J]
[A1]
[C]
[S1]
[S]
[K]
[M]
[F]
[D]
[L2]
[L]
[L1]
[M1]
[E]
[T]
[H1]
[B]
[H2]
Figure 1
Page 3
INSTALLATION
Step 1 - Oven Preparation
Assemble both ovens as described in
the Blodgett MT3870 OwnerOperator
Manual.
Use the three (3) Oven Securing Clips
[R] to secure the two decks together
and prevent shifting. (See Figure 2)
[R]
[R]
[R]
Page 4
Figure 2
If the ovens are equipped with align
ment knockouts, remove the two (2)
front indents. Those holes should
match the two (2) shown in Figure 3.
If the ovens are not equipped with align
ment indents, locate the center, front,
top edge of the upper oven. Drill two (2)
7/16" diameter holes in the top of the
oven as indicated in Figure 3. The holes
should penetrate both the top skin" of
the oven as well as the angle frame
members. There is no need to penetrate
the top of the oven by more than 7/8".
68 1/2
34 1/4 34 1/4
7/16 (2 PLS)
2 7/162 7/16
Page 5
FRONT OF OVEN
Figure 3
If the ovens are equipped with louvered
cooling fan exhaust outlets, attach the
Cooling Fan Exhaust Enclosure Mount
ing Plate [S1] to the top oven using two
#1024x1/2" screws [Q8] provided. See
Figure 4. For older oven models use the
alternate Cooling Fan Exhaust Enclo
sure Mounting Plate [S].
[S1]
Page 6
Figure 4
Step 2 - AMU Installation:
Thread two (2) Stacking Pins [Q6] into
the fittings on the bottom of the AMU/Ex
haust Manifold/Duct Connection as
sembly [A]. Carefully lift the AMU/Ex
haust Manifold/Duct Connection as
sembly [A] and place it on top of the
ovens. The alignment pins will fit into the
alignment holes in the top of the oven
and prevent the AMU/Exhaust Manifold/
Duct Connection assembly [A] from
shifting on top of the oven. (See
Figure 5)
If the AMU/Exhaust Manifold/Duct Con
nection assembly [A] does seat tightly
against the top of the oven, apply a bead
of high temperature silicone sealant in
the seam between the AMU/Exhaust
Manifold/Duct Connection assembly
[A] and the sides of the oven.
[A]
[Q6]
Silicone
Sealant
Alignment Hole
Page 7
Figure 5
Attach the AMU Support Bracket, Right
[B] to the AMU/Exhaust Manifold/Duct
Connection assembly [A] using two (2)
1/4"20 x 1/2" Hex Head Cap Screws
[Q3] and 1/4" Flat Washers [Q7]. (See
Figure 6)
Attach the AMU Support Bracket, Left
[C] to the AMU/Exhaust Manifold/Duct
Connection [A] assembly using two (2)
1/4"20 x 1/2" Hex Head Cap Screws
[Q3] and 1/4" Flat Washers [Q7]. (See
Figure 6)
[Q3] (4)
[Q7] (4)
[B]
[C]
Page 8
Figure 6
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