Battery
Output V d.c : 12 Volt Models
Output V d.c : 24 Volt Models
Temperature
Charge
Float
Charge
Float
° F
° C
Gel-Cell
Lead Acid Gel-Cell
Lead Acid Gel-Cell
Lead Acid Gel-Cell
Lead Acid
50
10
14.4
14.6
14.0
13.8
28.8
29.2
28.0
27.6
72
22.2
14.0*
14.2*
13.6*
13.4*
28.0*
28.4*
27.2*
26.8*
90
32.2
13.7
13.9
13.3
13.1
27.4
27.8
26.6
26.2
* Factory pre-set voltages without temperature compensation option installed
F) Equalize Timing Option
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 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 CE 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 5V d.c. 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.
To install the equalization timer:
1) Disconnect a.c input to the charger and disconnect charging leads.
2) Remove the PT charger cover assembly.
3) Locate the smaller “charger function” plug-in PCB which is located on the right
side of the charger. Locate “TP1” and “TP2”.
4) Route the two control wires of the timer through the bottom of the cover assembly
and solder the ends to the TP1 and TP2 board positions. (An entry hole is provided
next to the COMM terminal. Remove and discard hole plug.) Since this is low power
logic circuit wiring only, small gauge wire is acceptable (i.e., 22 AWG). If the equalize
timer wire run is greater than fifteen feet, use of twisted pair cable is recommended.
Temperature Compensation Chart
5) Ensure that the soldered ends of the control wires on the PCB cannot come into
contact with the charger housing. Use insulating material, if necessary. Replace the
charger cover assembly. Reconnect charging leads and a.c. input
G) Cooling Fan
To maximize the life of the internal components and to allow continuous operation
at full rating, the Phase Three employs an automatic integral cooling fan. This fan
operates whenever load and/or ambient temperature causes a rise in the heat sink
temperature. Its speed automatically increases/decreases in response to load/or
ambient temperature increase/decrease. Note: Under most circumstances, the fan
will be in operation when the charger is on. However, it may stop completely under
no load and/or low ambient temperature conditions.
The fan is equipped with a filter to keep debris from being sucked into the charger.
It is recommended that this filter be removed and rinsed with clean water occasionally
to ensure adequate air flow, particularly if the charger is mounted in a dusty or
particle-filled environment. Allow the filter to dry before putting it back onto the fan.
If the filter is ever damaged, a replacement is available from NEWMAR. (Specify
part number 999-9325-2 for models PT-70CE or PT-24-35CE; for all other models
specify part number 999-9450-2. If obtaining a filter from another source specify a
1/4" thick filter medium of 30 PPI density which you can cut to size.)
Filter Cleaning/Replacement
To remove the fan filter for cleaning or replacement (see FIGURE 10):
1) Disconnect the charger from the a.c. power source.
2) Remove the drip shield by grasping it on either side and pulling firmly upward.
3) Snap off the filter retainer and remove the filter.
FIGURE 10: FAN AND FILTER ASSEMBLY
Snap-on Filter Retainer
Filter
Fan Retainer Screw
Drip Shield
Fan
20
21
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