When no risers are ordered for the Universal Modular unit,
it is the responsibility of the installer to make sure that an
isolation ball valve is installed between each supply and
return piping connection to the unit. Flare fittings are factory
provided to allow connection between the ball valves and
the hoses.
Supply Air Installation
Knockout Tab
(10 places)
Duct Break
(4 places)
Knockout Tab
Trim Line
Figure 10
1. Each side of the unit has one supply air knockout as
well as a supply air knockout on the top of the unit (see
Figures 3A and 3B).
2. Determine which supply air opening/openings are
required for your application.
NOTE:
The supply air opening on the riser side of the unit
should not be used.
3. Use a sharp retractable knife to trim insulation using
center knockout slot/trim line as pattern (see Figure 10).
4. Use a sharp standard needle nose pliers and grab
knockout tab (see Figure 10).
5. Twist or pry pliers back and forth until knockout tab
breaks away from unit.
6. Repeat for all supply air tabs until all have been broken.
7. Discard center knockout piece. Be careful of sharp edges.
8. Use a sharp retractable knife to trim any excess
insulation using knockout hole as pattern.
Unit
Wall
Unit
Insulation
90°
Duct Flange
Figure 11
9. Use duct pliers (hand seamers) to fold duct flange out of
the unit 90˚ for each side of the supply air opening along
duct break (see Figure 10). The 90˚ flanges can now be
used as drywall stops to prevent coverage of discharge
opening (see Figure 11).
10. Use adhesive or glue to re-attach insulation that has
pulled away from the unit during knockout removal
process.
11. For ducted applications tape should be applied along
and around all of the supply air opening knockouts to
prevent air leakage.
All installations should be made in compliance with all
governing codes and ordinances.
Compliance with all codes
is the responsibility of the installing contractor.
Part 2 – Ditto and Siamese Ditto ( MAY/MBY)
The Ditto and Siamese Ditto Modular Hi-Rise Fan Coils have
been designed to serve two separate rooms. These products
are classified by Underwriters Laboratories Inc. for use in
Penetration Firestop Systems. Control Number 27WL. They
carry a one-hour rating. See UL Fire Resistance Directory for
more information.
10
10
Modular Hi-Rise Series Fan Coils
INSTALLATION, OPERATION, & MAINTENANCE MANUAL
