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two conditions will shorten battery life.
Therefore, the Phase Three Charger is designed to utilize
an optional remote sensor (available from NEWMAR,
model TCS-12/24) which provides automatic temperature
compensation. The remote sensor will signal the charger to
fine tune its output voltage so that it is properly matched to
the temperature of the battery/battery environment. The
adjustment rate is approximately -3mV per cell per °C.
(Note: The temperature compensation option is strongly
recommended for sealed, valve-regulated or gel-cell
batteries.)
The remote sensor is provided with 30' of cable (model
TCS-12/24-40 is provided with 40' of cable). One end of the
cable is plugged into the temperature compensation jack
which is located on the right side of the charger. (See FIGURE
5.) The temp sensor jack is identified on the front panel.
If additional cable length is required, additional cable is
commonly available from most electronics supply retailers
as Radio Shack/Tandy. Request a 6 conductor modular-
to-modular line cord (part number 279-422, 25 feet long)
and 6 pin modular in-line non-reversing coupler (279-423).
The sensor itself should be mounted on the inside of the
battery box, or more ideally, mounted onto one of the
batteries using a clamp or a small amount of silicon-type
adhesive. The sensor has a hole in the center which will
accommodate a #6 screw. If you have access to the exterior
of a wall of the battery box, you may drill a hole in the
wall of the box and run the screw through to mount the
sensor onto the interior wall. Use caution when drilling
so that you do not accidently puncture the case of any
battery inside the box.
Important note: When wiring multiple units in parallel (see
section III-E) and using the temperature compensation
option, you must use a separate sensor for each charger,
and the sensors must be mounted close together in the
same battery box or on the same battery for proper
operation.
FIGURE 5: Temperature Compensation Sensor and
EVM-12-2 Panel Installation
Gel-Cell/Flooded/AGM Switch
Remote Panel Jack
Temperature Compensation
Jack
Temperature Compensation Charts:
Battery Temperature
°F
°C
Gell-Cell
50
10
14.4
72
22.2
14.0*
90
32.2
13.7
* Factory pre-set voltages without temperature compensation option
installed.
Battery Temperature
°F
°C
Gell-Cell
50
10
28.8
72
22.2
28.0*
90
32.2
27.4
* Factory pre-set voltages without temperature compensation option
installed.
To give some idea of the effect of the temperature
compensation sensor, the chart on the following pages list
the charge/float output voltages of the charger when no
sensor is installed (or when batteries are at 72° F), and at
cold (50° F) or hot (90° F) battery temperature with temp
sensor installed:
G) Cooling Fan
To maximize the life of the internal components and to
allow continuous operation at full rating, the Phase Three
Charger employs two integral cooling fans. The fans draw
air through the bottom of the unit and expel it out the top
to improve cooling and reduce the possibility of drawing
in water drops (an optional dripshield is provided for extra
protection). Note: Under most circumstances, the fans will
be in operation when the charger is on. However, fan
speed/audible may vary under no load and/or ambient
temperature conditions.
H) Output Ammeter
This will indicate total charging output current for all
battery banks connected.
I) Power-On Indicator
This green LED will glow whenever the charger is receiving
AC power.
Output V DC: 12 Volt Models
Charge
Float
Lead-
Gell-Cell
Acid
14.6
14.0
14.2*
13.6*
13.9
13.3
Output V DC: 24 Volt Models
Charge
Float
Lead-
Gell-Cell
Acid
29.2
28.0
28.4*
27.2*
27.8
26.6
Lead-
Acid
13.8
13.4*
13.1
Lead-
Acid
27.6
26.8*
26.2
9
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