Mars Air Systems L-2254 - Manual (Page 4)

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English L-2254 Introduction
INTRODUCTION
Congratulations on the purchase of your Marine Air
Systems’ Vector Compact
® air conditioner. No matter
which of the following features was the reason for your
purchase of this air conditioner, we are sure it will meet
your needs and will give you many years of efficient and
trouble free use. The Vector Compact self-contained
direct expansion air conditioners are designed for marine
applications incorporating the following features:
• Patented compact design with the condenser coil in
the evaporator shroud
• High efficiency rotary compressor or scroll (24K)
compressors
• Cupronickel condenser coil
• Enhanced fin designed evaporator coil
• 2" deep drain pan with multiple condensate drain
locations
• Anti-vibration base pad
• Pre-charged and pre-wired systems for easy
connections
• Rotatable blower assembly
• Charge Guard® ensures environmental protection
and system integrity
This manual is intended to provide the information
necessary to ensure proper installation, operation, and
maintenance of the unit. The figures that are referenced
throughout this manual can be found immediately after
the warranty section. Improper installation or misunder-
stood operating procedures can result in unsatisfactory
performance and/or premature failure of these units, so
before proceeding
please read this manual completely.
The Vector Compact units are covered under the existing
Dometic Environmental Corporation (Dometic) warranty
policy contained in this manual. In the interest of product
improvement, Dometic’s specifications and design are
subject to change without prior notice.
Clean Air Act Amendments of 1990
[Title VI - Section 608(C-1)]
“Effective July 1, 1992, it shall be unlawful for any
person, in the course of maintaining, servicing, repairing,
or disposing of an appliance or industrial process
refrigeration, to knowingly vent or otherwise knowingly
release or dispose of any Class I* or Class II** sub-
stance used as a refrigerant in such appliance (or
industrial process refrigeration) in a manner which
permits such substance to enter the environment. De
minimis releases associated with good faith attempts to
recapture and recycle or safely dispose of any such
substances shall not be subject to the prohibition set
forth in the proceeding sentence.”
* Class I substances include CFC-12
** Class II substances include HCFC-22
Marine Air Systems
Marine Air Systems (MAS) is a product of Dometic
Environmental Corporation. Dometic is a recognized
leader in the design and manufacture of high-perfor-
mance comfort control systems, refrigeration products
and battery charging products for demanding environ-
ments, including commercial and recreational marine
craft, vehicles and other applications. We offer an
unparalleled scope of products, dealer networks, applica-
tions support, engineering resources and production
capabilities throughout the world. Our team has many
years of experience in the design, manufacture, applica-
tion and support of our products. Our practical experi-
ence and design capability allows our application
engineers and sales representatives to offer optimum
solutions for your environmental control requirements.
Product lines also include well known Cruisair, Grunert,
and Sentry.
How It Works
Your self-contained air conditioner consists of four main
components and a refrigerant gas circulating through the
system. The BLOWER draws warm cabin air across the
fins on the EVAPORATOR where the heat from the air is
transferred to the refrigerant in the evaporator coil. As
the refrigerant evaporates from a liquid into a gas it
absorbs the heat from the cabin air. The COMPRESSOR
then compresses the refrigerant gas and pumps it
through the outer tube in the CONDENSER COIL. The
seawater pump circulates cool seawater through the
inner tube in the condenser coil, this cools the refriger-
ant and condenses it into a liquid. The heat from the
refrigerant is exchanged to the seawater and discharged
overboard. The liquid refrigerant is then passed through
the EVAPORATOR COIL and the cycle repeats. Remov-
ing heat from the cabin air lowers its temperature. The
cooled air is blown through the ducting and out the
supply air grille(s). For reverse cycle heating, the refriger-
ant flows in the opposite direction through the reversing
valve. Heat is transferred from the seawater in the
condenser coil to the refrigerant and then to the air
blowing through the evaporator into the cabin. Seawater
temperature will directly affect the a/c unit’s efficiency.
This a/c unit can effectively cool your boat in water
temperatures up to 90°F and heat in water temperatures
as low as 40°F. See Figure 1.