Hamilton
Home
Products
Canal
Winchester,
OH
76106
61MH0028A
Page
5
Provisions shall be made to permit the air in the rooms and the
living spaces to return to the furnace. Failure to comply may
cause a reduction in the amount of return air available to the
blower, causing reduced air flow resulting in improper heating
of the living space. The reduced air flow may cause the
furnace to cycle on the limit causing premature heating
element failure.
Figure 4: Typical Alcove Installations
Figure 5: Clearance – Access for Service
Air Distribution System
The furnace is designed to operate at a 0.30 inch WC static
pressure. In order to assure proper air flow through the furnace
the duct distribution system must be designed so that the
external static pressure from the furnace, thru the duct system
must not exceed 0.30 inch WC. It is recommended you review
the manual
“Manufactured Housing Duct Systems Guide to
Best Practices”
by Manufactured Housing Research Alliance
(MHI-MHRA)
before selecting the air distribution system
you are going to use.
SECTION IV: SUPPLY AIR AND DUCT
CONNECTOR INSTALLATION
Duct Connectors
90-DCU0-XX Duct Connectors
The duct connector is used to provide a sealed connection
between the furnace base and a under the floor duct system.
The duct connector allows the furnace to be installed on a
combustible floor without the use of a separate sub base
providing insulation is placed between the duct connector and
the combustible floor. Table 5 indicates the duct connector
needed for your application.
DEPTH FROM FLOOR
TO DUCT
DUCT CONNECTOR
NODEL NUMBER
1"
90-DCUO-01
2"
90-DCUO-01
3"
90-DCUO-01
4"
90-DCUO-01
5"
90-DCUO-02
6"
90-DCUO-02
7"
90-DCUO-02
8"
90-DCUO-02
9"
90-DCUO-03
10"
90-DCUO-03
11"
90-DCUO-03
12"
90-DCUO-03
Table 5: Duct Connectors
Figure 6: Duct Connector Depths
Duct connector can be installed on combustible flooring,
except carpeting
. It is recommended to use insulation
having a rating of R-12 or higher is used between the floor
base and the combustible floor.
The use of insulation with a rating of R-12 or higher
between the floor base and a combustible floor is a
precautionary measure to prevent the combustible floor
from getting to warm. The use of R-12 insulation between
the duct connector and the floor is not a requirement.
