NewMar Guided Wave 12-1200IC User manual

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Inverter/Chargers
Guided Wave Series
Models:
12-1200IC
12-1799IC
24-1300IC
INSTALLATION/OPERATION MANUAL
CONTENTS
Section Topic Page
I) OVERVIEW.......................................................................... 2
II) IMPORTANT SAFETY CAUTIONS AND WARNINGS.............3
III) INSTALLATION.................................................................... 3
A) Materials Provided...............................................4
B) Location...............................................................4
C) Mounting.............................................................4
D) Case Grounding.................................................. 5
E) Battery Selection and Sizing............................... 5
F) Battery (DC) Wiring..............................................6
G) Charging Multiple Battery Banks........................8
H) AC Input Wiring.................................................. 9
I) AC Output Options...............................................10
J) Remote Panel (optional).......................................11
IV) BATTERY CHARGER OPERATION AND ADJUSTMENT...... 12
A) Charger Operation...............................................12
B) Output Voltage Adjustment................................ 13
V) INVERTER OPERATION.......................................................14
A) Start-Up/Operation.............................................14
B) Inverter On/OFF Switch Function......................15
C) Inverter Shut-down Indicators and Causes........ 15
VI) SPECIFICATIONS................................................................ 16
VII) BATTERY CARE TIPS...........................................................17
VIII) REFERENCE APPENDIX......................................................19
APR 2002
GUIDED WAVE
INVERTER/CHARGER

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I) OVERVIEW
Your NEWMAR Inverter/Charger uses 12 VDC or 24 VDC (depending on model) battery
power to produce 120 VAC, 60 Hz power for operating virtually any AC appliance. It incorpo-
rates field-proven technology which provides reliable service in harsh commercial and recre-
ational marine applications.
The Guided Wave series inverter/charger produces a quasi-sinusoidal output to match the
RMS value of AC utility power and enables the operation of almost all appliances such as
refrigerators, microwave ovens, dishwashers and power tools. (For highly sensitive loads
such as computers and plasma screens, our Perfect Wave series is recommended, as it
produces a pure sine wave.)
All units incorporate a built-in two stage battery charger for rapid and safe replenishment of
batteries whenever shore or generator AC power is available.
All models feature numerous circuit and safety protections, such as thermally controlled
cooling fans and ground fault protected duplex outlets, utilize automatic AC transfer relays
and are housed in rugged, rust-resistant powder-coated aluminum cases suitable for perma-
nent bulkhead or horizontal mounting. An optional remote indicator and control panel
(model ICR-1) is available, as well.
In addition, your Inverter/Charger is UL listed and warranted for two full years, parts and
labor. Careful attention to these instructions should enable you to enjoy many years of
trouble-free service.
Figure 1: Quick Reference Contents 115 VAC Duplex Outlet;
Page 10
15 Amp (Master) "Output Breaker";
Page 10
+Battery Input/Output Wiring;
Page 6
Battery Charger Functions;
Page 12
Case Grounding;
Page 5
AC Input
Page 9
Remote Panel Option;
Page 11
Hardwire AC Output;
Page 10
Cooling Fan;
Page 15
L.E.D. Status Panel;
Page 14
Automatic Transfer
Switch (Internal);
Page 14
Inverter Functions;
Page 14
-
Charger Output
Voltage Adjustment
Page 13

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II) IMPORTANT SAFETY CAUTIONS AND WARNINGS
CAUTION: Inverters produce hazardous voltages. To avoid risk of harm or fire the unit must
be properly installed. There are no user-serviceable parts inside. Do not remove the inverter
housing.
CAUTION: The inverter should not be mounted in a location that may be exposed to rain or
spray.
CAUTION: The inverter should not be installed in a zero-clearance enclosure.
CAUTION: Damage to the inverter will occur if correct polarity is not observed when installing
the DC input cables.
CAUTION: Damage to inverter will occur if an external AC source is applied to the inverter’s
AC output socket or its hard-wire AC output.
CAUTION: The inverter contains a circuit breaker and capacitor that may produce a spark.
Do not mount in a confined battery or gas compartment.
CAUTION: Working in the vicinity of lead-acid batteries is dangerous. Batteries generate
explosive gasses during operation. There is a risk of acid exposure. There is also a risk of
high current discharge from shorting the battery that can cause fire and explosion.
CAUTION: UL and ABYC specify that the DC input shall be fused no farther than 18" from
the battery. This is the responsibility of the installer.
CAUTION: Be sure both the inverter and, if used, the external AC input circuit breaker or
fuse are turned “OFF” during installation.
WARNING: The inverter/charger is not ignition protected so it must not be located in
an area where ignition protected equipment is required.
EXTERNAL CONNECTIONS TO THE INVERTER/CHARGER SHALL COMPLY WITH UL
RECOMMENDATIONS AND/OR UNITED STATES COAST GUARD ELECTRICAL REGULA-
TIONS (33CFR183, SUB-PART I)
THE INSTALLATION AND PROTECTION OF VESSEL WIRING ASSOCIATED WITH IN-
VERTER/CHARGERS SHALL COMPLY WITH ABYC STANDARDS E-8) AC ELECTRICAL
SYSTEMS ON BOATS, E-9) DC ELECTRICAL SYSTEMS ON BOATS, A-20) BATTERY
CHARGING DEVICES AND A-25) INVERTERS.
III) INSTALLATION
IMPORTANT: Do not attempt to begin the installation until you have read and understood
this section completely. If you have any questions regarding the installation of the inverter/
charger, contact NEWMAR’s technical service before proceeding.

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A) Materials Provided
The inverter/charger is provided with an installation kit containing the following:
(2 ea.) Cable clamps
(1 ea.) Warning label for AC distribution panel
(1 ea.) Installation/Operation Manual
(1 ea.) Customer satisfaction/warranty card
If items any are missing, please contact the factory. Upon completion of the installation,
please fill out the warranty card and return it to the factory. (Be sure to include the serial
number of the unit, located on the top of the housing.)
B) Location
The inverter/charger should be located as close to the batteries as possible, ideally no more
than about 4-6 feet. The maximum allowable distance is 20 feet. Do not mount the unit
directly over the batteries as battery fumes may cause excessive corrosion. WARNING: The
inverter/charger is not ignition protected so it must not be located in an area containing gaso-
line engines or the like, nor in any other area where ignition protected equipment is required.
The area should be well ventilated and free from moisture, exhaust manifolds and battery
fumes.
Do not locate the unit where water, spray or condensation can occur, as this will shorten its
life. It should not be located where there is a possibility of dust or debris being drawn into
the unit through the fan. A minimum of 2" clearance around the unit is recommended for
proper cooling.
If the inverter/charger is located in an extreme heat area, such as an unventilated engine
room, and maximum operating temperature is exceeded, an automatic thermal protection
circuit will shut the unit completely off. It will automatically return to service when it has
cooled sufficiently, however this thermal cycling will shorten the life of the inverter/charger,
so if this condition occurs repeatedly, it should be relocated. For optimum performance and
longer life the unit should not be located in an area of high temperature.
C) Mounting
The inverter/charger may be mounted on either a horizontal or vertical surface; performance
will be unaffected by its orientation, however, per UL safety recommendations, when
mounted vertically the front panel controls should be facing downward. It may be mounted
on either a metal or non-metal surface. Four 1/4" screws (wood or machine screws, depend-
ing on mounting surface) with washers are required to secure the unit to the mounting
surface.
IMPORTANT: Although the inverter/charger is constructed of materials and in a manner
which makes it resistive to the corrosive effects of the marine environment the unit is not
waterproof. Do not mount the charger where there is a possibility of water entering the unit.
Evidence of water entry into the charger will void the warranty.

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D) Case Grounding
The case of the inverter/charger must be properly grounded to ship’s ground*.
*Per ABYC A-20: A DC chassis grounding conductor shall be connected from the case of
the battery charger to the engine negative terminal or its bus, and must not be more than
one size under that required for the DC current-carrying conductors.
For example, if the installed battery wiring (see Wire Size Chart in the following section) is 1
AWG, then the minimum size of the grounding cable is 2 AWG. Use stranded copper wire for
case grounding. A screw compression lug located on the right-hand side of the unit is pro-
vided for attaching the ground wire to the case. The lug accommodates wires up to 1/0
AWG. A flat blade screwdriver is required to tighten the lug.
E) Battery Selection and Sizing
The inverter/charger should only be wired to deep cycle lead-acid batteries of flooded, gel or
AGM construction. The battery bank should be a dedicated inverter (or house) bank. It
should not be connected to batteries which are designed primarily for engine or generator
starting. Those batteries are not designed for repeated deep discharges which are common
with inverter operation.
There are quite a number of variables which can influence the proper size of a battery sys-
tem (expressed as amp-hour capacity) which is used in conjunction with an inverter. Some
of these include:
lBattery type
lDischarge rate
lIntermittent or continuous operation
lAmbient temperature
lTime between recharge cycles
lDepth of discharge
No single formula can practically cover all these variables, however, a general calculation
may be used which assumes no extraordinary variable (such as very high or low tempera-
tures in the battery environment) to make an educated estimation of the proper battery size.
The result can then be adjusted up or down to compensate for unusual circumstances.
Use the following procedure to calculate the required amp-hour capacity for your battery
system:
Note: It is assumed that the batteries are a suitable deep-cycle type, that discharge will
not exceed 50%, and that batteries will be fully recharged after each cycle of inverter
use.
1) Determine the maximum amount of time in hours that the inverter will run the
loads before an external source of AC becomes available and batteries can be fully
recharged.

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2) Survey all AC appliances and determine how many watt-hours will be consumed by
each during that same period. For instance, if a 100 watt TV will be powered for 3
hours, that equals 300 watt-hours. If a 1,500 watt microwave will also be run for half
an hour, then that is another 750 watt-hours (i.e., 1,500 x .5). Bear in mind that
some loads, such as refrigerators, are intermittent, so an average must be used.
3) Add up the total watt-hour consumption of all appliances, then apply this simple
rule to determine total DC (battery) amp-hours consumed:
12 Volt Inverters: Divide Watt-Hours by 10
24 Volt Inverters: Divide Watt-Hours by 20
Note: These divisors allow for standard inefficiency during voltage conversion.
4) Finally, since it is generally recommended that batteries never be discharged below
50%, the result must be multiplied by 2 to obtain the proper total battery capacity.
Example # 1: You have a 12 volt inverter. Your total consumption between recharge cycles
is 2,400 watt-hours, so...
2,400 ÷ 10 = 240 (Amp-Hours Consumed)
240 x 2 = 480
So, in this example, a properly sized battery system will be rated for at least 480 amp-hours.
Example # 2: You have a 24 volt inverter. Your total consumption between recharge cycles
is 3,600 watt-hours, so...
3,600 ÷ 20 = 180 (Amp-Hours Consumed)
180 x 2 = 360
In this case, you need a battery system rated for at least 360 amp-hours.
F) Battery (DC) Wiring
CAUTION: Ensure that hydrogen gas does not accumulate near the battery by keeping the
area well ventilated. A substantial spark may result when connecting the final battery wiring
due to an initial charging of the internal input capacitor.
Refer to Figure 2 on the following page for a typical battery wiring scheme.

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FIGURE 2: Typical Battery Wiring
Note: A typical parallel battery wiring scheme
is depicted here. When wiring batteries in parallel,
it is good practice to attach the (+) and (-) leads to
opposite ends of the battery string, as shown. This
contributes to a more even voltage distribution
among the battery plates when charging and
discharging.
Use only stranded copper wire for DC input/output. Refer to the following chart for the
proper wire size depending on inverter/charger model and the length of wire required*:
Wire Size Chart
Model Length of Wire from Charger to Batteries (in feet)
10' 15' 20' Over 20'
Minimum Wire Gauge (AWG)
12-1200IC #4 #2 #2 Not Recommended
12-1799IC #1 #1 #1/0 Not Recommended
24-1300IC #8 #8 #6 Not Recommended
*Meets minimum requirements of ABYC 10% voltage drop table for inverter maximum
input current, 3% voltage drop table for charger maximum output, and allowable
amperage for 105° C rated insulation conductors <50 VDC inside engine space.
Consult ABYC E-9 for lower temperature rated insulated conductors.
CAUTION: Ensure that leads are properly fused no further than 18" from the battery. (Refer
to ABYC recommendations regarding fuse type and location.) Refer to the chart on the fol-
lowing page for the proper battery fuse value for each model:
FUSE
INSTALLER
SUPPLIED
-
+BATTERY (-) NEGATIVE
BATTERY (+) POSITIVE

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DC Fuse Chart
Model Fuse Value
12-1200IC 150 Amp
12-1799IC 200 Amp
24-1300IC 100 Amp
To gain access to the DC wiring lugs of the inverter/charger, remove the wiring access cover
from the front of the unit (plate is screened with the “Guided Wave” trademark/logo), which
is held in place by two phillips-head screws.
A pair of large screw compression lugs for DC wiring are located in the compartment on the
far right. Use 1/4" flat blade screwdriver for loosening and tightening these terminals. CAU-
TION: Do not attempt to loosen or tighten these terminals when the DC wiring is connected
to a battery. There is a possibility of shorting through the screwdriver between the case and
the (+) terminal, which will cause a violent spark and possible injury.
DC wires are fed through the two access ports on the right-hand side of the unit labeled “(+)
POSITIVE” and “(-) NEGATIVE”. After the wires have been attached to the terminals, tighten
the cable strain relief securely with a phillips screwdriver to protect against any possible
loosening of the DC wires.
Install a properly sized and located DC fuse (as per ABYC recommendations cited above) in
the positive leg of the battery wiring, then attach the wires to the battery, carefully observing
correct polarity. Note: It is normal to encounter a spark when connecting the final battery
wiring due to the initial charging of an internal input capacitor.
CAUTION: A reverse polarity connection will result in damage to the inverter/charger which
is not covered under the warranty.
G) Charging Multiple Battery Banks
If desired, the charger may be wired to charge multiple battery banks. This can be accom-
plished using NEWMAR’s BI-100 Battery Integrator. The device acts as a “smart” switch,
connecting independent battery banks only when a charging voltage is present, then discon-
necting them for selective discharge. This allows you to also charge an engine start bank, for
instance, whenever external AC is present, but draw current only from the house or dedi-
cated inverter bank whenever the inverter is operating.
Note: Standard diode-type isolators are not recommended for splitting the output of the
internal charger among multiple battery banks, as the voltage drop through the diodes will
result in chronic undercharging of the additional banks.
A separate BI-100 is required for each additional battery bank to be charged. Contact the
factory for more information on this product.

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H) AC Input Wiring
Refer to Figure 3 for all AC input and output wiring options in this section and in section I.
Figure 3: AC Input and Outputs
The inverter/charger is provided with a three-wire 12 AWG AC cord with molded plug . It
should be plugged into a properly grounded and over-current protected outlet which is "hot"
whenever shore or generator AC power is available. The AC input serves two functions:
1) It provides power for the internal battery charger whenever external AC is available.
2) It allows routing of an external AC source through the inverter/charger so that, by
use of a built-in automatic transfer switch, AC is available directly from the unit at all
times either from the inverter or shore/generator power.
Note: There is a set of AC wires located in the compartment on the bottom front of the unit
which is labeled "AC Wiring Compartment". These are for optional hard-wiring of AC Output
only. Do not attempt to hard-wire AC input through these wires. Applying AC from an
external source to the AC output wires will cause severe damage and void the warranty.
If hard-wiring of AC input is desired the plug may be removed. Use stranded copper 12 AWG
wire only and pay careful attention to color-coding as follows:
Black..............................Hot
White..............................Neutral
Green..............................Ground (safety, earth)
WHITE - NEUTRAL
BLACK - HOT
GREEN - GROUND
AC OUTPUT TO
DISTRIBUTION PANEL*
* See distribution panel note in
section I-2, following page
INVERTER ON/OFF SWITCH
GFCI PROTECTED DUPLEX
AC OUTLETS 15 AMP TOTAL OUTPUT
(MASTER) CIRCUIT BREAKER
AC INPUT TO BATTERY CHARGER AND
AUTOMATIC TRANSFER RELAY
3' AC POWER CORD,
ATTACHED AT REAR

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AC input wiring for the inverter/charger must be routed through a 15 amp fuse or circuit
breaker on an AC distribution panel with proper safety/earth chassis ground in accordance
with all applicable local codes and ordinances.
I) AC Output Options
AC output is available from both the front panel AC duplex outlets and via the AC hard-
wired output, which is typically routed through an AC distribution panel.
1) AC Outlets: A duplex outlet is provided for USA standard three-prong plugs. The maxi-
mum current draw through both outlets (and AC hard-wire output, explained below) com-
bined at any one time is 15 amps (1800 watts). The outlets are over-current protected by a
resettable 15 amp output breaker on the front panel beside the outlets.
The outlets are protected by a GFCI (Ground Fault Circuit Interrupter) which automatically
disconnects the outlets when any significant amount of AC is detected on the ground circuit
which could present a shock hazard. Note: The AC hard-wire output is not GFCI protected.
2) AC Output Hard-Wiring
CAUTION: Integrating the inverter output with existing AC branch circuits must only be at-
tempted by a qualified marine electrician. Options may include isolating breakers on an exist-
ing panel or installing a separate, dedicated inverter AC sub-panel.
Three 14 AWG AC output wires are located in the "AC Wiring Compartment" on the bottom
front of the inverter. To access them remove the compartment cover using a phillips screw-
driver. Before attaching the output wires:
1) Pop out one of the circular knock-outs in the compartment cover. (It may be
necessary to punch it out by firmly tapping it with a hammer and chisel/screwdriver.)
2) Install one of the provided cable clamps in the hole.
3) Pass the external AC wires through the clamp.
4) The internal wires have been factory-fitted with 16-14 AWG butt splices. Use a
crimping tool to connect the wires.
5) Replace the compartment cover and tighten the cable clamp to secure the wiring.
Note: Installation of the remote panel also requires access to this compartment, so if that
option is being installed, do that first before replacing the cover.
CAUTION: Do not connect any other source of AC power directly to the output of the inverter.
This will result in damage not covered under the warranty.
IMPORTANT INSTALLATION NOTE: Per ABYC section A-25 a label must be installed at the
main electrical panel to warn anyone who may work on that panel that an inverter has been

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installed. This is because it might be falsely assumed that after the AC main has been shut
off the panel is no longer "hot", when it may still be, due to the automatic functioning of the
inverter. A set of AC distribution panel warning labels has been provided in the installation
kit. Choose the preferred black or white background label and affix it in a clearly visible
location at the panel.
CAUTION: The AC outlets and AC hardwire output on the inverter remain “live” when derived
from an external source, even when the inverter is shut off.
J) Remote Panel (Optional)
Remote monitoring of inverter functions, as well as inverter output activation/shut-off, may
be obtained using model ICR-1 Remote Panel, available from NEWMAR. The panel duplicates
all of the LED status indicators (discussed in section V following) which are on the front
panel and incorporates a secondary on-off switch for the inverter.
FIGURE 4: Remote Panel Installation
The panel face and mounting hole pattern have been designed for an exact fit within a du-
plex outlet box. If preferred, it may be mounted directly to a bulkhead with the two provided
black-oxide wood screws. Note the cut-out dimensions specified in Figure 4 and take special
care when making the cut-out as the tolerances between the mounting holes and rear-
mounted circuit board are quite small.
The ICR-1 is supplied with 25 feet of cable. If additional length is required, contact the
factory for an extension cable.
The inverter/charger is supplied from the factory with an in-line connector assembly which
is located in the same compartment as the AC output wires. The connector is a telephone
jack type and has a “dummy” plug attached which enables all of the inverter functions
when no remote panel is used. Remove and save this plug prior to attaching the remote
25' CABLE SUPPLIED
WITH REMOTE PANEL
REMOVE FACTORY INSTALLED
"DUMMY" PLUG AND INSERT
REMOTE PANEL IN-LINE PLUG
MOUNT PANEL IN DUPLEX
OUTLET BOX OR USE TWO
PROVIDED SCREWS FOR BULK-
HEAD MOUNT
PANEL DIMENSIONS:
4 1/2" HIGH x 2 3/4" WIDE
PANEL REAR CUT-OUT AREA
(for bulkhead mount):
2 7/8" HIGH x 2 1/8" WIDE

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panel plug. (The dummy plug is required to restore proper functioning of the unit if the
remote panel must be disconnected for any reason in the future.)
To install the in-line plug:
1) Remove the "AC Wiring Compartment" cover (if it has not already been removed to
attach AC output wires).
2) Pop out one of the circular knock-outs in the compartment cover. (It may be
necessary to punch it out by firmly tapping it with a hammer and chisel/screwdriver.)
3) Install one of the provided cable clamps in the hole.
4) Pass the connector and cable of the remote panel through the clamp, then tighten it
down securely.
5) Snap the plug into the in-line assembly and replace the compartment cover.
Note: In order for the remote panel's Inverter On-Off switch to operate, the on-off switch on
the inverter front must be in the “ON” position. Refer to section V-B for more information on
the operation of the ON/OFF switch.
IV) BATTERY CHARGER OPERATION AND ADJUSTMENT
A) Charger Operation
Operation of the built-in two-stage battery charger is fully automatic and the charger is
operational whenever external AC is applied.
Figure 5 illustrates a typical output curve of the charger into batteries which are deeply
depleted (and not under load, initially) as well as output when a load is applied to fully
charged batteries.
FIGURE 5: Typical Two Stage Charging Output Graph

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Note that as depleted batteries are first encountered, the charger responds with high "bulk"
current output. This high current output continues until the finishing or "float battery
voltage is achieved (13.8 VDC for 12 volt models; 27.6 VDC for 24 volt model).
At this point, the battery would measure full charge if tested with a voltmeter, but it is only
what is called a “surface charge”. For this reason the charger continues to deliver amperage
(as shown in the graph) but output begins to fall off as the battery plates become saturated.
When current output is at or near zero, batteries are at or near full voltage.
Note that once batteries are fully charged and intermittent DC loads are applied (as shown
in the graph) battery voltage remains constant. This is due to the charger’s excellent output
regulation. The charger senses any DC load demand (while external AC voltage is applied)
and responds instantaneously with the required current output while maintaining constant
output voltage. This is unlike older technology chargers which respond with significant
current output only when DC load demands have caused a substantial drop in battery
voltage.
Therefore, once batteries are fully charged, any DC load on the system (within charger rat-
ing) will come directly from the charger—not the batteries—so there is no need to “top off”
batteries if there have been DC appliances or electronics in use and it becomes necessary to
disconnect the charger before getting under way.
While the output regulation of the charger will minimize battery gassing and water loss,
monthly checks of the electrolyte level (for wet lead acid batteries) are still strongly recom-
mended. Some water loss is an inevitable aspect of the charging process, and maintaining
the correct electrolyte level in your batteries is the most important thing you can do to as-
sure their maximum performance and long life.
B) Adjusting Charger Output Voltage (Optional)
The finishing or "float" output voltage of the internal battery charger has been factory pre-
set at 13.8 VDC (12 volt models) or 27.6 VDC (24 volt model). This voltage assures full
charge while staying just below the gassing point of most typical marine batteries.
If a special application requires it, the output voltage may be adjusted up or down some-
what. Use a small flat tip screwdriver to turn the potentiometer on the front panel which is
labeled "Charge Voltage Adjustment":
lTurn clockwise to raise the finishing voltage
lTurn counter-clockwise to lower the finishing voltage
The factory-set output voltage and approximate user-adjustment range are as follows:
Factory Set
Model Output Voltage Adjustment Range
12-1200IC 13.8 VDC 12.8 - 14.5 VDC
12-1799IC 13.8 VDC 12.8 - 14.5 VDC
24-1300IC 27.6 VDC 25.6 - 29.0 VDC

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CAUTION: This adjustment should be made only by a qualified marine electrician. Special
tools and procedures are required for accurate adjustment of output voltage. Consult with
the battery manufacturer for charging voltage recommendations before making this adjust-
ment. Over or undercharging will result in battery damage.
V) INVERTER OPERATION
A) Start-Up/Operation
When all battery and AC wiring has been correctly installed, check for proper operation as
follows:
1) With no external AC applied, turn the power switch on the front of the unit to “On”.
The “Inverter” L.E.D. should illuminate.
Note: If the remote panel is used, the power switch on that panel must also be turned
on for the inverter to operate. In addition, every L.E.D. indication on the remote panel
should be identical to the indication on the front panel of the inverter. Verify that this
is so during start-up tests and initial operation.
2) Plug an AC appliance into each of the two receptacles (outlets) on the front of the
inverter and verify proper operation. If the appliance does not operate, the black GFCI
test button may have been inadvertently pushed during installation. Press the red
reset button and the appliance should then operate.
3) Check the proper hard-wire output (if used) by plugging the appliance into a recep-
tacle which is fed by the AC distribution system.
4) Apply external (shorepower or generator) AC to the input of the inverter. After a
delay of approximately 5 seconds the internal automatic transfer switch should acti-
vate and the “External Power” L.E.D. should illuminate.
5) Remove the external AC source. The automatic transfer switch should activate
immediately, and the “Inverter” L.E.D. should again illuminate.
Having completed this initial test the external AC source may be reapplied and all inverter/
charger functions should then be operational with no further attention required, other than
occasional status checks, as desired.
A Note Regarding Use with Microwave Ovens
Because the inverter produces a quasi-sine rather than true sine wave output, microwave
ovens will typically cook more slowly using the inverter than if operating on utility power.
This is normal, and some experimentation may be necessary at first to determine correct
cooking times.

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B) Inverter ON/OFF Switch Functions
It is important understand the functioning of the ON/OFF switch of the inverter, so that
there can be no incorrect assumption about when AC is being applied within the unit, at the
duplex outlets or the AC hard-wire output.
1) The ON/OFF switch (either on the front or remote panel) controls only whether the
internal DC-AC inverter is operating. Whenever external AC is applied the internal
battery charger is operational and AC is "live" at both the duplex outlets and
the AC hard-wire output, even if the switch is "OFF". Only shutting off the external AC
at its source will prevent AC flow through the inverter. (Note that, when external AC is
applied the "External" L.E.D. remains illuminated, regardless of which position the
ON/OFF switch is in.)
2) If a remote panel is connected and:
a) the front panel switch is ON, then the inverter can be controlled with the
remote ON/OFF switch.
b) the front panel switch is OFF, then the inverter remains off, regardless of the
position of the switch on the remote panel.
C) Inverter Shutdown Indications and Causes
Three “Shutdown Mode” L.E.D.s are provided to indicate an abnormal condition which has
caused the inverter to cease functioning temporarily. The indicators and likely causes are as
follows:
1) “Low Input Voltage” L.E.D.: Batteries may be permanently damaged by extreme
discharge. Therefore, the inverter monitors battery voltage and shuts off when it
reaches a critical low point (10.5 VDC for models 12-1200IC and 12-1799IC; 21.0
VDC for model 24-1300IC). Typically, this occurs when operating the inverter for long
periods without any external AC source coming on line to recharge the batteries. If
this condition occurs soon after the inverter is turned on, it may be due to an under-
sized, old/weak battery system or to under-sized/over-length battery wiring. Verify
proper battery capacity and health, verify proper wire size and length (see Battery
Wiring section), then recharge fully.
2) “Overload” L.E.D.: This may be due to either of two causes; short circuit or too
much wattage demand. Remove all AC loads. If the indicator remains lit, then a short
circuit is likely. Check AC output wiring carefully. If load removal causes this L.E.D.
to be extinguished then the demand is probably exceeding the inverter's rating. Check
the total wattage of all appliances being used at one time and this is within the unit’s
rating.
3) “High Temperature” L.E.D.: The inverter employs an integral cooling fan which
operates automatically to keep the unit within rated operating temperature—under

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normal operation, and when properly installed. It is also protected, however, by an
internal thermal switch which shuts the unit completely off when it gets too hot. This
is typically due to being located in a high temperature area or a small enclosure
which restricts air flow, or due to a blockage of the air intake of the cooling fan. En-
sure free flow of air around and into the unit. Relocate it if necessary. Note: The ther-
mal switch is self-resetting, so the inverter/charger will automatically return to ser-
vice when it cools to a safe operating temperature. Nevertheless, thermal cycling of
this sort will shorten the life of the unit, and should not be allowed to continue if it is
noted.
VI) SPECIFICATIONS
MODEL 12-1200IC 12-1799IC 24-1300IC
Inverter Output:
VAC 115V, 60 Hz. 115V, 60 Hz. 115V, 60Hz.
Watts (Surge) 3300 6000 3000
Watts (Cont.) 1200 1800 1300
Wave Type Quasi-Sine Quasi-Sine Quasi-Sine
Inverter Input:
VDC 11-14 11-14 22-28
Max Amps 120 180 65
Charger Output:
VDC (@ Float) 13.8 13.8 27.6
Max Amps 50 65 25
Charger Input:
VAC 115V, 60 Hz. 115V, 60 Hz. 115V, 60Hz.
Max Amps 9139
Weight: Lbs. 27 27 26
Case Size (all models): H W D
7.5" 8.2" 15.0"
Internal Charger Type: Two stage; "Bulk/Float"
Operating Temperature (all models): -22° C to +40° C (0° F to 104°F)
Mechanical Features (all models):
lThermally controlled cooling fan
lGFCI protected duplex outlets
lPowder coated aluminum case with integral mounting flanges
lConformal coated printed circuit boards
Protection Features (all models):
lAutomatic low battery shutdown
lOutput circuit breaker
lAuto high temperature shutdown/recovery
lShort circuit protection
lOverload protection
lCurrent limiting (battery charger)

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Compliance:
lUL 458 Listed
Options
lRemote control and indicator panel; provided with 25‘ of cable. Model: ICR-1
lBattery Integrator for charging multiple output banks. Model: BI-100
lDigital DC Energy monitor for precise indication of battery volts, amps, amp-hours used
and remaining. Includes programmable high/low voltage remote alarms. Model: DCE
VII) BATTERY CARE TIPS
Regular maintenance and proper care will assure you reliable service from the most
depended upon and sometimes most neglected items, your batteries and battery
charger. NEWMAR battery chargers are designed to keep your batteries fully charged
but your batteries also need proper regular maintenance to provide a maximum life of
service.
ALWAYS READ AND FOLLOW THE BATTERY MANUFACTURER’S INSTRUCTIONS
Battery Installation
Batteries must be securely mounted to prevent them from falling over when the ve-
hicle or boat is in motion. A loose battery can do serious damage. Batteries should be
mounted in a battery box to contain any acid spill. Batteries give off a certain amount
of hydrogen gas when they are charging. When concentrated, this gas is highly explo-
sive. Therefore make sure they are in an accessible place with adequate ventilation for
any hydrogen gas discharge.
Cleaning Batteries
Dirt and electrolyte salts can build up on the top of your batteries. This accumulation
conducts electricity stored in the battery and can cause the battery to discharge by
itself. Therefore, at least twice a year, it is a good idea to disconnect the battery cables
and scrub the battery with a baking soda solution. Rinse with fresh water and dry
with a clean cloth.
You may wish to purchase a set of terminal post corrosion prevention rings. These are
alkali-saturated felt rings that slip over the battery post to reduce corrosion. Do not
apply grease to any part of the battery terminals, but you may use an occasional light
spray of silicone lubricant.
Routine Checks and Maintenance
Batteries should periodically be “exercised” (slowly discharged and then recharged) to
keep them in top condition. New batteries may need to be exercised before they will be
capable of their full rating.

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If your batteries are not the sealed type, distilled water should be added to them
whenever needed. The electrolyte should cover the plates by about 1/2", allowing a
small air space at the top. Do not fill the cells up to the filler cap as this could cause
the battery to sputter out electrolyte when it is being charged. Only distilled water
should be used never plain tap water. Tap water contains chemicals and elements
that can alter the properties of the electrolyte, including specific gravity. Some chemi-
cals may also create an insulating coating on the battery plates which will retard
current flow.
The rate that water is lost by the battery is dependent on several factors; battery
condition, ambient temperature, battery use, charge voltage, etc. It is normal for
batteries which are not maintenance-free to require topping off about once a month.
A battery’s state of charge may be monitored by checking the specific gravity or by
open circuit voltage. You may use the following table to evaluate the condition of your
batteries:
Battery Condition Table
Specific Gravity
Measured by State of
Hydrometer Open Circuit Voltage Discharge @ 80° F
12 Volt System 24 Volt System
1.265 12.6 or more 25.2 or more Fully Charged
1.225 12.4 24.8 25 % Discharged
1.190 12.2 24.4 50 % Discharged
1.155 12.0 24.0 75 % Discharged
1.120 11.7 or less 23.4 or less 100 % Discharged
*Note: Wait at least 5 minutes after charging or discharging before checking specific
gravity or open circuit voltage. The battery’s voltage needs to stabilize in order to get an
accurate reading.
Troubleshooting Your Battery System
If your battery will not accept or hold a charge, one of the following conditions may
exist:
1. A BAD BATTERY. You may have a battery with an open or shorted cell, a battery
without any “life” left. Check by charging the battery until all cells have a specific
gravity of 1.225 or greater at 80° F. If you are unable to obtain 1.225 in each cell,
replace the battery.
2. A BAD BATTERY CHARGER. If the battery open circuit voltage is low and/or the
hydrometer indicates your batteries are low, the battery charger should be providing
current to the batteries. If it is not, check the input fuse and check to see that you
have charging voltage on the output with no battery attached. Note: You will not get an
accurate voltage reading on the output of the charger with no batteries attached. This is
checked merely to ensure that you do not have an open circuit on the output.

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The battery charger has a thermal power reduction circuit to protect the charger from
overheating. If you suspect this is the case, refer to the INSTALLATION section for
information about proper charger location.
3. ELECTRICAL LEAKAGE. You may have a previously unsuspected source of cur-
rent drain from the battery. To check for a leakage of this sort, disconnect the battery
ground cable and connect an ammeter between the negative battery post and ground.
If you have a reading over .1 amp, there is a source of current drain from the batteries
which must be located and removed.
VIII) REFERENCE APPENDIX
!!
!!
!For more information about boat wiring to conform to U.S. Coast Guard
regulations, write:
Superintendent of Documents
Government Printing Office
Washington, DC 20402
Request : 33 CFR 183 Subpart I
!!
!!
!For information about American Boat and Yacht Council
recommendations for boat wiring, write to:
American Boat and Yacht Council
3069 Soloman’s Island Road
Edgewater, MD 21037
Request: Standards and Recommended Practices for Small Craft.
AC systems: Section E8
DC systems: Section E9
A-20: Battery Charging Devices
A-25: Inverters
!!
!!
!For additional installation instructions, refer to:
ANSI NFPA 302