F) Equalize Timing Option - NewMar PT-24-20W Installation & Operation Manual

FIGURE 5: Temperature Compensation Sensor
and Remote Panel Installation
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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:

F) Equalize Timing Option

Temperature Compensation Chart
Battery Temperature
°F
50
72 22.2
90 32.2
* Factory pre-set voltages without temperature compensation option installed
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P.O. Box 1306, Newport Beach, California 92663 • Phone: 714-751-0488 • Fax: 714-957-1621 • E-Mail: techservice@newmarpower.com
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Output V DC: 12 Volt Models
Charge
°C Gel-Cell Lead Acid
10 14.4 14.6
14.0* 14.2*
13.7 13.9
Not for sealed Lead-Acid (maintenance free), Gel, or AGM – for
Flooded Lead-Acid Only. Some manufacturers of flooded lead-acid
batteries recommend a charging process known as equalization
for extended battery life. This process involves occasionally
charging a wet lead-acid battery life at a very high voltage for a
short period of time in order to completely de-sulphate each of the
battery plates, essentially equalizing their voltage. The installer of
the Phase Three Charger may choose to wire in this option at the
time of installation.
Note: The equalization process is not recommended for sealed
valve-regulated or gel-cell batteries.
The equalize terminals (located inside the PT charger) should be
wired through a manual or electric timer which provides a closed
contact when engaged and an open circuit when timed out (SPST
– Single Pole Single Throw). Do not use a manually operated switch
for the equalize timer. This is because unless the charger is reverted
to a safe float voltage in a timely manner, the batteries will almost
certainly be damaged or destroyed. The timer should be a 0-12
hour type, capable of carrying a minimum of 100 mA at 5 VDC.
CAUTION: Do not install the timer in an area requiring ignition
protected equipment unless it has been certified to meet ignition
protection requirements.
The equalization circuit of the Phase Three Charger boosts output
voltage to approximately 8% above float voltage. Refer to the
battery manufacturer's instructions when deciding the appropriate
time period setting for this voltage to achieve proper equalization,
while ensuring batteries are not damaged by increased battery
temperature. This installation should only be performed by a
qualified technician.
Installing the timer requires a mating connector with dual wires
which are plugged into a jack on the internal charger function
circuit board. The connector/wire assembly is available from
NEWMAR. Request part number 873-3716-0, CFB Equalize 2 pin
assembly. Proceed with the installation as follows:
(Caution: Ensure AC input has been disconnected before
proceeding.)
1) Remove the charging leads (if already attached)
2) Remove the charger cover assembly (as previously described)
3) Locate the two-pin header labeled "J2" just over the cut-out on
the top of the vertically oriented charger function circuit board.
Insert the mating connector and route the two-control wires
through one of the air vents on the bottom of the charger beside
the "COMM" terminal. Connect the wires to the timer.
4) Replace the cover assembly. Reconnect the charging leads and
AC input.
Float
Gel-Cell Lead Acid Gel-Cell
14.0 13.8 28.8
13.6* 13.4* 28.0*
13.3 13.1 27.4
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Output V DC: 24 Volt Models
Charge Float
Lead Acid Gel-Cell
29.2 28.0
28.4* 27.2*
27.8 26.6
Lead
Acid
27.6
26.8*
26.2