Dometic Blizzard NXT H551816A User Manual

2
TABLE OF CONTENTS
INTRODUCTION ....................................................................................................................................................................2
DOCUMENT SYMBOLS ........................................................................................................................................................2
IMPORTANT SAFETY INSTRUCTIONS ................................................................................................................................ 3
A. Recognize Safety Information ...................................................................................................................................3
B. Understand Signal Words ..........................................................................................................................................3
C. Supplemental Directives ............................................................................................................................................ 3
D. General Safety Messages .........................................................................................................................................3
SPECIFICATIONS .................................................................................................................................................................. 4
A. Table - Unit Data ........................................................................................................................................................4
B. Roof Requirements ....................................................................................................................................................4
C. Table - Air Distribution Duct Sizing & Design .............................................................................................................4
INSTALLATION INSTRUCTIONS ..........................................................................................................................................5
A. Choosing Proper Location For Unit ...........................................................................................................................5
B. Roof Preparation .......................................................................................................................................................5
C. Air Distribution Duct Sizing & Design ........................................................................................................................6
D. Wiring Requirements .................................................................................................................................................8
E. Choosing Thermostat Location ..................................................................................................................................9
F. Thermostat, Optional Indoor Temperature Sensor & Thermostat Communication Cable Installation ......................9
G. Placing Unit On Roof ............................................................................................................................................... 11
H. (CCC2SystemOnly)Conguration ........................................................................................................................ 11
I. 120 Vac Power Supply Connection .........................................................................................................................12
J. LCD SZ System Low Voltage Wire Connections ..................................................................................................... 14
K. CCC 2 System Low Voltage Wire Connections .......................................................................................................14
L. Securing Unit To Roof ..............................................................................................................................................14
M. (LCD SZ System Only) System Checkout ............................................................................................................... 16
N. (CCC 2 System Only) Reset & Checkout ................................................................................................................16
O. (CCC 2 System Only) Furnace/Aqua Temperature Differential Setting ................................................................... 16
GENERAL INFORMATION ...................................................................................................................................................17
A. Heat Gain ................................................................................................................................................................17
B. Condensation ..........................................................................................................................................................17
WIRING DIAGRAMS ............................................................................................................................................................18
A. Simple RV Wiring Diagram ...................................................................................................................................... 18
B. Unit Wiring Diagrams ...............................................................................................................................................19
DOCUMENT SYMBOLS
Indicates additional information that is NOT related
to physical injury.
Indicates step-by-step instructions.
INTRODUCTION
This air conditioner/heat pump (hereinafter referred to as “unit” or “product”) is designed and intended for installation on the
roof of a Recreational Vehicle (hereinafter referred to as RV) during the time it is manufactured.
Read these instructions and highlight the appropriate steps for your particular procedure before starting the installation.
This unit can be installed by one person with brief help from additional personnel. Use these instructions to ensure a properly
installed, and properly functioning product.
DometicCorporationreservestherighttomodifyappearancesandspecicationswithoutnotice.

Dometic Blizzard NXT H551816A Specifications

General

Brand	Dometic
Model	Blizzard NXT H551816A
Category	Air Conditioner
Language	English