Mammoth Concentric Curb Transition, 547869, 547878 Installation guide

INSTALLATION

INSTRUCTIONS

SUPERSEDES 10-26-04

SEPTEMBER 2, 2008

NEITRN07

Step 1:

Check for correct part number listed above:

Step 2:

Attach duct to transition duct connections.

Step 3:

Move the noted duct support to match the 33” dimension.

Step 4:

Install transition in supply/return opening in roof curb as shown so the duct work will line up with concentric diffusers.

The Concentric Curb Transition is designed to drop into the curb and convert the square duct unit connections to round

duct. For use with 547860, 547861, 547862, & 547863 roof curbs.

INSTALLATION INSTRUCTIONS FOR

547869 / 547878

CONCENTRIC CURB TRANSITION USED

WITH GR4GM 090-120 UNITS

FORM# 611A-0808 (611A-0298)

MODEL# DUCT SIZE

547869 20” ROUND

547878 18” X 28” RECTANGLE

ROOF CURB

*MOVE TO INSTALL TRANSITION

547878

18” x 28” DUCT CONNECTIONS

547869

20” ROUND DUCT CONNECTIONS

RETURN

SUPPLY