Step 1 – base assembly, Step 2 – hood mount bars, Step 3 – caulk – Twin City Modular Gravity Hood - MGI with Filters - IM-4720FSL User Manual

Page 2: Step 4 – filter rails

Twin City IM-4720FSL

Step 1 – Base Assembly

Fasteners (Kit #1B and #1C) –

Note: There may be extra fasteners.

Lay out the

Curb Base Side, Hood Support Assembly and Curb Base End in approximate location to each other. See

Figure 2. Use (3) 1/4-20 fasteners for 5" base height and (4) 1/4-20 fasteners for 12" base height. Leave top two

holes open on the Base End.

Note: Hand tighten only until Step 3. Bolt together Curb Base Sides to Hood Support

Assembly with (8) 1/4-20 fasteners per Hood Support Assembly for 5" bases and (10) 1/4-20 fasteners for 12" bases.

On some hoods, a

Doubler Plate is required. See Detail A of Figure 2. For base assemblies with more than one

Hood Support Assemblies, orient top flanges away from center.

Curb Base End

Curb Base Side

Hex Nut

Screw

Hood Support Assembly

Curb Base Side

Curb Base End

Step 2 – Hood Mount Bars

Fasteners (Kit #1B and #1C)

Loosely assemble

Hood Mount Bars on both sides of the Base Ends using (4) 1/4-20 fasteners per side. On hoods

using a

Doubler Plate, mount Brace using 5/16-18 hardware. See Figure. 3b.

Step 3 – Caulk

Caulk inside corners of base assembly and tighten all fasteners. Install assembly onto roof curb before proceeding.

Ensure that assembly is properly anchored to roof curb.

Hood Mount Bar

Brace

* When Kit 1C provided.

Figure 2.

Figure 3a.

Figure 3b.

Step 4 – Filter Rails

Fasteners (Kit #6B) –

Note: There may be

extra fasteners.

Attach

Filter Channel, Type -A- to the

Hood Mount Bar using cap screws and

nuts (hand tight). Lay

Filter Channel,

Type -B- onto assembly and wedge Filter

Stop Plate between them and the Base

Assembly. Assemble with cap screws and

nuts (hand tight).

Screw, Flanged Head

Hex Nut, Flanged

Filter Rail, Type -A-

Base Assy

Filter Stop Plate

Filter Rail, Type -B-

Figure 4.

Doubler Plate

DETAIL A