Dometic Blizzard NXT H541815A User Manual

6
INSTALLATION INSTRUCTIONS
3/4″ Min.
Leave Access For
Power Supply Wiring
FIG. 2
15″ Min. At
Front Of
Opening
Do Not Cut Roof
Structure Or
Rafters
Good-Rafters
Supported By
Cross Beams
Good Location
Between Roof
Rafters
Frame Opening So It
Won't Collapse When
Bolting Down Unit
C. Air Distribution Duct Sizing & Design
The installer of this system must design the air distribution
system for their particular application. Several requirements
must be met for the unit to operate properly. These require-
ments are as follows:
1.  Make sure ductwork will NOT
bend or collapse during and after installation,
and that it is correctly insulated and sealed.
Otherwise, damage to roof structure and ceiling
could occur.
2. All discharge air ducts must be properly insu-
lated to prevent condensation from forming on
their surfaces or adjacent surfaces during op-
eration of unit. This insulation must be R-7 mini-
mum. See (FIG. 3).
3. Ducts and their joints must be sealed to prevent
condensation from forming on adjacent surfaces
during operation of the unit.
4. Return air openings must have 40 square inches
minimumfreeareaincludingthelter.
5. Returnairtotheunitmustbelteredtoprevent
dirt accumulation on unit cooling surface.
Frame
DuctDuct
Frame
Frame
Roof Opening
Roof Opening
Roof
SIDE VIEW
(TOWARD BACK OF RV)
Duct
Ceiling
Duct
Insulation
TOP VIEW
(BACK OF RV)
FIG. 3
6. Air Distribution Installation
a. Dometic Corporation recommends the basic
congurations shown in (FIG. 4), (FIG. 5),
(FIG. 6), & (FIG. 7). We have found by test-
ing, that these congurations work best in
most applications. It is the responsibility of
theinstallertorevieweachRVoorplanto
determine the following:
● Duct size
● Duct layout
● Register size
● Register location
● Thermostat location
● Indoor Temperature Sensor Location
These items must be determined in conjunc-
tion with the Air Distribution Duct System
Sizing & Design requirements. See "C. Table
- Air Distribution Duct Sizing & Design" on
page (4).
Installer responsible for any necessary
adapters between unit and ductwork.

Dometic Blizzard NXT H541815A Specifications

General

Brand	Dometic
Model	Blizzard NXT H541815A
Category	Air Conditioner
Language	English