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' Guest 2815m Battery Charger A'

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For one 1 year from the date of purchase The Guest Co Inc
will at its discretion repair or replace for the original of charge any part or parts found upon examination by Guest
Co Inc 48 Elm St Meriden Connecticut to be defective in
material or workmanship or both Proof of purchase required charges under this warranty must be borne by the
consumer I
If you our customer have any questions concerning parts or warranties please contact our Monday through Friday between 900 AM and 400
PM Eastern Time formerly 2615AM
48 Elm St Meriden CT 06450 USA
A Valley Forge Company
I MODELS 281 5M11 15 AND 281 5M123D
Writefor your free copy ofthe new GUEST catalog INSTALLING AND USING THIS PRODUCT
Keep these instructions for future reference
Description Guest 2815M ChargePro is a solidstate 3stage and is
lightweight silent and completely automatic It can Total output a full 15 amps of 12 volt DC charging current while using
maximum 15 amps at 12 volts DC
much less AC current than other chargers This revolutionary new float mode 01 to 03 amps at 13
volts DC
design can rapidly recharge and individually maintain 2 separate Output banks at one time If a DC short or overload occurs the
with 15 amp load 12 volts DC will reduce its output voltage to a safe level then finish float
voltage 135 volts DC 7 01 volts return to normal after the overload is removed Its Input voltage 2815M1 15
90 to 140 voltsSO or 0 Hz AC
water resistant polycarbonate housing and urethane coated circuitry Input voltage 2615M230
190 to 240 voltsSO or 60 Hz AC
make it ideal for harsh environments Every Guest 28l5M charger Max AC draw at 115 volts 3 amps
is tested under load before shipment to assure superior reliability Housing dimensions 9H x 7 78W x 4D
Application Diagram 1 Guest 2815M charging method
This battery charger is ideal for a wide variety of installations using
12 volt leadacid or gelcell batteries Some of the most popular Time
battery are
Two Group 24 batteries 0
Two Group 27 batteries 0
One Group 4D battery and one Group 24 battery 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
01 01 01 01 using more or larger batteries are possible but it may DC Amps
require a longer time to recharge the batteries in these J RBuIk Absorbtion 0 Float
Longer recharging times can also result if there is equipment on
board that requires substantial amounts of DC current while at
dockside such as This device meets or exceeds FCC Part 15 Standards elating to
a DC only refrigerator or ice maker RF interference This device is not intended for use with
combination 1224 volt battery systems
a DC only air conditioner or heater
a large number of 12 volt DC lights in use If your vessel does not already have an ABYC app oved AC
dockside power system The Guest Company strongly
Iwo different versions of the Guest 281 5M are available recommends that you consult with a qualified marine 1ectrician
The model 2815M11 15 for 115 volt AC input and before installing this device Improper AC conne tions can
The model 2815M1230 for 230 volts AC input cause physical injury or damage to your vessel
Both versions will function with either 50 Hz or 60 Hz AC inputs 2
Operation Checklist for required tools and mate rials
When the 2815M charger senses a drop in battery voltage it increases its output to recharge the
battery By Electric drill with 14 and 116 drill bits
using a sophisticated 3 stage charging method it recharges your Wire cutting and crimping in the fastest healthiest way
14 slotted screwdriver
2 516 and 38 socket wrenches or nut driven
The amp meter on the front of the charger shows the total
Portable DC volt charging current during the first and second charging
Safety glasses work gloves and long sleeved shirt
stages bulk charging and absorption charging When the
low battery approaches full charge the charger reduces its output Additional materials
to a float charging rate indicated by the green LED light This 4 10 SS hex head or round head machine bolt
low float voltage gently tops off your batteries then keeps them Bolt length mounting surface thickness ph s 1
fully charged and ready for use without overcharging 4 each 10 SS flat washers lock washers and hex nuts
20 7 cable ties wmounting holes cx Beckson L7M1I
The total 15 amp output of this charger is divided between both 8 x 34 SS pan head selftapping screws for
ofthe batteries connected to it however the charge being applied fastening cable ties to mounting surface
to each battery is individually regulated AC wiring
When using the 281 SM to charge a single battery a jumper wire 1 5 amp AC circuit breaker or fuse if one is rot already
not included must be connected between the two DC positive installed and available in your Main AC panel
outputs ofthe charger See page 10 6 8 ring terminals to attach the AC input wires to the
charger and to the main AC panel
The Guest ChargePro 281 SM battery charger is fully automatic
as 3 conductor 14 gauge Marine UL listed AC cable to
requires no maintenance and can be left unattended indefinitely bring powerfrom your AC Main panel to the the electrolyte battery
acid in leadacid batteries can i
DC evaporate particularly in warm climates Check your Tinned stranded copper wire to connect the once a month as a part ofyour
maintenance routine
as DC outputs to your batteries Red wire for positive
req connections and black wire for neative
Overload Protection Use the table DC wire size on page 8 to electrical demand occurs in the DC system
the correct diameter wire to use ror to this charger it will reduce its output voltage to a safe In the event of a
dead short the chargers output voltage will 4 10 ring terminals to attach DC output wires be zero volts
3 516 ring terminals for connecting the 1C output
Once the overload or short is removed the 281 SM will automatically wires to the batteries positive terminal normal operation
1 ring terminal to fit the engines negative ground post
Installation Preparing the mounting location
1 Hold the battery charger against the surface wh re you
are planning to mount it Be sure that you will bc able to
drill holes through this surface later without damage to
Before beginning this installation wiring tanks or other equipment Using a penc1 mark
Open engine hatches and operate bilge blowers for 10 the locations of the battery chargers four mounting holes
minutes to remove dangerous fumes and hydrogen gas onto the mounting surface
Disconnect all AC power sources 2 Drill four 14 holes through the mounting surface at the
locations you marked with pencil
Disconnect negative battery cables from all batteries
Wear safety goggles gloves and long sleeved shirt when Note Do not mount the charger until you have
made thefollowing electrical connections
drilling or while handling a mounting location Electrical connections
1 Mount this charger in an upright position only with the Installing the Guest 2815M1115 or 2815M230 equires
aluminum cooling fins running vertically It is important making two different types of electrical connections the DC
that the charger have at least 6 inches of unrestricted 12 volt battery system and the AC dockside power
airflow on all sides for effective cooling Do not install Planning the DC connections
onto a carpeted upholstered or varnished surface
You can configure the Guest 281 SM charger to mainain one
2 Although this charger is ruggedly designed avoid or two separate 12 volt batteries There are several ways to
mounting it in an areathat is open to rain snow or spray connect this charger into your present 12 volt system
3 Avoid mounting this charger within 3 feet of a compass The simplest and most widely used connection metho i is
TV or FM radio
1 Run one red DC wire from each of the chargers wo DC
4 Select a mounting location which will allow the shortest positive outputs to the positive posts ofeach battery
DC wires between the charger and the batteries When charging a single battery you must conncct both
5 Do not mount this unit directly over your batteries charging outputs to the battery
because their corrosive fumes can damage the circuitry 2 Connect a black DC wire from the chargers ommon
inside this charger
negative terminal to the engine blocks ommon
6 Be sure that the mounting location will allow access to negative ground terminal
the connections on the charger after it is mounted This method is illustrated in diagram 2 on page 7
5 6
Planning the DC connections cont Making the DC is the most common type ofbattery charger
1 Use the following table to determine the gauge
thickness of the wire you will need to carry the current
from the charger to your batteries safely and Diagram 2
Recommended DC wire sizes
Length of wire in feet as measured from the battery
chargerto the farthest battery and back to the charger
red maximum 3 voltage drop
Max 10 feet 15 feet 20 feet 25 feet 30 feet 40 feet 50 feet
Two 12 volt 10 l4ga l2ga lOga tOga tOga 8 ga 6ga
115 I2ga lOgs lOga Sga 8ga 6ga 6ga I
20 10 ga 10 ga 8 ga 6 ga 6 ga 6 ga 4 ga
25 10 ga 8 ga 6 ga 6 ga 6 ga 4 ga 4 ga
30 10 ga 8 ga 6 ga 6 ga 4 ga 4 ga 2 ga
12 volt DC negative ground 40 8 ga 6 ga 6 ga 4 ga 4 ga 2 ga 2 ga
Two alternative methods for making the DC connections are 50 6 ga 6 ga 4 ga 4 ga 2 ga 2 ga 1 ga
I connecting the DC positive outputs of the charger to from Section E9 table Vii of the American Boat and YachtCouncil ABYC
the battery connections on your battery switches or standards and Recommended Practices for 5mail Craft
2 connecting the DC positive outputs of the charger to 2 Find a path for the DC wires between the chargtrand
the output posts of your battery isolator Do NOT your batteries Remember to route the wires away from
connect the chargers outputs to an isolators inputs hot surfaces or other areas where the wires could be
These methods are only recommended if your 281 SM will be damaged Make sure you will be able to fasten a ceVble tie
mounted much closer to your battery switches or battery to a solid surface at least every 18 inches throughout the
isolator than it will be to your batteries length of the wires to support them according to ABYC
standard E9 1 5h
For sample diagrams of these types of refer to
Guest document 121681 This is included with all Guest 8
battery switches and isolators and is available on request
The DC connections continued Remove the two screws on the lower face of the to
expose the wiring terminals The AC and DC
3 You will also need to establish a path between the
terminals are arranged as shown here
chargers common DC negative output and the common
negative engine ground connection This is normally Diagram 3
where the batteries negative cables connect to the engine
block When installing this unit in outboard powered
boats the DC negative charger output will be
connected directly to the negative terminal of one or
both Do not connect any wires to the batteries or to the charger
until AFTER you have cut each one to size crimped an
appropriate connector onto each end and securely mounted
the wires with the screwdown cable ties This can help to
prevent accidental during your 4 After you have determined an appropriate path for the
DC wires to each battery cut them to size leaving three to Battery 2
feet extra Strip 38 of insulation from the battery ends BLACK
of the red wires Test fit a 516 ring terminal onto the to NEGATIVE
threaded positive posts ofyour batteries Remove the DC ground NOTE When charging only one I
engine block a 12 ga jumper wire must be a
ring terminal from the battery post and crimp or solder it
between output posts DC 1 and DC
onto the battery end of the red wire This is the correct way to attach terminals to the
5 Repeat step 4 for the red positive wire leading to the
other battery s positive post Diagram 4 II 1l
6 Repeat step 4 for the black wire using a ring terminal
that will fit your engines negative ground terminal
7 Use screw mounted cable ties or wire straps to fasten all
the wires between the batteries and the charger onto solid
surfaces Avoid running wires over sharp edges or near
areas ofextreme heat
Making the AC connections To use a grounded 3prong outlet
Do not apply AC power until after you have made all cf the DC
AUflON connections Use AC sockets with a ground fault your vessel does not already have an ABYC approved AC
GFCI breaker Do not use 2 blade ground adapter plug i
dockside power system The Guest Company strongly recommends 1 Use only a heavy duty 3 conductor AC cord such a a Guest
that you consult with a qualified marine electrician before installing part U2554 or Radio ShackTM part device Improper AC connections can
cause serious physical 2 Crimp 8 ring terminals onto the three AC wires
injury and may damage your vessel
3 Make the AC connections on the front of the making any AC connections be certain that all sources of according to diagram 3 on page 10
AC current have been safely disconnected from the vessel
4 Do not plug the chargers cord into an AC outlet until
DONT ASSUME after you complete the following steps
The Guest 2815M1 15 and 2815M230 chargers each require three Finishing the wiring connections These connections are
1 Connect the DC output wires to the DC output ten ninals of
a Ground wire normally green or the charger as shown in diagram 3 on page 10 Use a 38
socket wrench or nut driver Do not over tighten
a Neutral wire normally white or blue and
2 Connect the other end ofthe black negative DC ire to the
a Hot or Line wire normally black or brown engines common negative ground or to the negativ posts of
To hard wire the charger into your AC system both batteries
1 Determine a safe path for the AC wiring between the charger and 3 Connect the other ends of the red positive DC wires to the
Main AC panel Avoid hot or sharp surfaces positive posts of your batteries NOTE A small spark may
occur This is normal
2 Fasten all wiring onto solid surfaces using screwmounted cable
4 Confirm that all sources of AC power are turned off Connect
ties or cable straps every 18 inches the AC input wires from the AC Main panel to the AC
3 Attach 8 ring terminals onto both ends of the AC wires by terminals on the charger as shown on diagram 3 on page 10
crimping or soldering Use a 516 socket wrench or nut driver Do not over tighten
3 Install a 5 amp AC circuit breaker or fuse into the AC Hot wire 5 Replace the rectangular cover plate over the screw terminals
black or brown in your Main AC panel Attach the AC Hot on the front of the charger passing each wire through one of
Ground and Neutral wires from the charger to the appropriate the notches in the cover plate Attach the cover plate to the
connection points at the Main AC panel charger with the screws provided
You are now ready to fasten the charger onto mounting urface
Mounting the Battery Charger
r Problem I
One or more defective or
1 Test
batteries and
1 Charger does not
seem to be charging damaged batteries replace i the charger onto the mounting surface as shown here
2 Charger has reduced its 2 Remove the source of
Diagram 5 Note Measure the output voltage below the overload or short
voltages in your charging level due to a DC and thn retest the
batteries as described overload or a DC short charger as described
under Operation to under Operation to
confirm that there is confirm that it is
actually a charging charging properly
10 hex nut 1 Blown DC output fuses I
To due to the charger being
a Unplug AC power
10 lock washer attached to the batteries
2 The green LED backwards b Remove charger cover
10 flat washer light blinks and the 2 A single battery has been c
Inspect both fuses
amp me er porn er connected to the charger
rubber washer bolt fluctuates rapidly without tying its two d If a fuse
has blown use
included ONLY u
Buss ATO 20
positive outputs together
with a jumper wire Pg 10 amp as replacement
10 flat washer
I This could be due to 1 Disconnect the negative
DC cutput wire from
Fasten all wires leading from the charger onto the mounting a A dead short or overload
the charger using cable ties Avoid any sharp edges that might cut 3 The green LED b One or more bad batteries
AC pover The green
never turns on LED only should now
the insulation ofthe wires This completes your installation c A heavy DC load on
light If it does the
batteries while charging charger is OK If not
Testing your installation such as lights pumps etc contact The Guest
Activate the battery charger by reconnecting your dockside AC I Confirm that AC power is 1
Connect AC power
power Observe the amp meter on the front of the charger It available
supply cr reset breaker
4 The amp meter
should show that current is flowing into your batteries Turn does not move and 2 Inspect the chargers AC 2
Disconnect all AC
the green LED does input wiring and wire power surces and then
on several DC lights if you are not sure if the meter is not light terminals for damage or
repair When the batteries have reached full charge the loose connections
3 Return iharger to Guest
green LED light on the front of the charger will turn on 3 Component failure
Service 24 hours use a voltmeter to check the voltage at the 5 The GFCI breaker 1 There is a problem in the I
Confirn that the
positive and negative posts of each battery with the charger on Ground Fault chargers AC connections
charger AC cord is
Each battery should read between 132 to 136 volts DC Ifyou Circuit Interrupter or the AC power supply
intact tien test the AC
turns off whenever power sipply
have large batteries or a continuous DC load is present 2 Certain brands of GFCI
the char er is
breakers are unusually 2 Contact Guest the battery voltages after 48 hours turned on
for information
sensitive to switching
style power supplies

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