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Transfer Switch terminals N1 and N2 (also called
Utility 1 and Utility 2) are the input utility AC power
connections to the Transfer Switch. Transfer Switch
terminals T1 and T2 (also called Load 1 and Load 2)
are the transfer switch AC output power terminals
that go to the load circuit distribution panel. Transfer
Switch terminals E1 and E2 are the AC power termi-
nals that come from the generator's main alternator.
When in GTS mode, the control board will respond
as follows based on the generator AUTO/OFF/MANU-
AL switch position.
OFF — The generator will not start and run in this
position
MANUAL — The generator control board will start
and run the generator whenever the switch is in the
manual position.
AUTO — The generator control board will monitor
the 2-Wire start circuit (terminals 178 and 183 in the
generator control panel). When a 2-Wire start signal
is issued by the W type engineered transfer switch,
via a relay contact closure that connects wire 178 to
wire 183, the generator control board will immedi-
ately start and run the generator. When the 2-Wire
start signal is removed the control board will imme-
diately stop the generator.
2.11 BATTERY INSTALLATION
Standby generators installed with automatic
transfer switches will crank and start automati-
cally when NORMAL (UTILITY) source voltage is
removed or is below an acceptable preset level.
To prevent such automatic start-up and possible
injury to personnel, do not connect battery
cables until certain that normal source voltage at
the transfer switch is correct; the generator main
line circuit breaker is switched to OFF; the
AUTO/OFF/MANUAL switch on the control con-
sole is switched to OFF; the 15A and 5A fuses
have been removed from the control console;
utility fed supply to battery charger (terminals
N1 and N2) is removed; and the system is ready
to be placed into operation. Ensure that the 5A
and 15A fuses in the control panel are removed
when connecting or disconnecting battery cables.
Storage batteries give off explosive hydrogen
gas. This gas can form an explosive mixture
around the battery for several hours after
charging. The slightest spark can ignite the gas
and cause an explosion. Such an explosion can
shatter the battery and cause blindness or
other injury. Any area that houses a storage
battery must be properly ventilated. Do not
allow smoking, open flame, sparks or any spark
producing tools or equipment near the battery.
Battery electrolyte fluid is an extremely corro-
sive sulfuric acid solution that can cause severe
burns. Do not permit fluid to contact eyes, skin,
clothing, painted surfaces, etc. Wear protective
goggles, protective clothing and gloves when
handling a battery. If fluid is spilled, flush the
affected area immediately with clear water.
Do not dispose of the battery in a fire. The bat-
tery is capable of exploding.
Do not open or mutilate the battery. Released
electrolyte can be toxic and harmful to the skin
and eyes.
The battery represents a risk of high short cir-
cuit current. When working on the battery,
always remove watches, rings or other metal
objects, and only use tools that have insulated
handles.
2.11.1 VENTED BATTERIES
The electrolyte is a dilute sulfuric acid that is
harmful to the skin and eyes. It is electrically
conductive and corrosive. The following proce-
dures are to be observed:
• Wear full eye protection and protective clothing,
• Where electrolyte contacts the skin, wash it off
immediately with water,
• Where electrolyte contacts the eyes, flush thor-
oughly and immediately with water and seek med-
ical attention, and
• Spilled electrolyte is to be washed down with an
acid-neutralizing agent. A common practice is to
use a solution of one pound (500 grams) bicarbon-
ate of soda to one gallon (4 liters) of water. The
bicarbonate of soda solution is to be added until
the evidence of reaction (foaming) has ceased. The
resulting liquid is to be flushed with water and the
area dried.
Lead acid batteries present a risk of fire
because they generate hydrogen gas. The fol-
lowing procedure are to be followed:
• DO NOT SMOKE when near batteries,
• DO NOT cause flame or spark in battery area, and
• Discharge static electricity from body before touch-
ing batteries by first touching a grounded metal
surface.
Servicing of batteries is to be performed or super-
vised by personnel knowledgeable of batteries and
the required precautions. Keep unauthorized person-
nel away from batteries.
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DANGER
Section 2 — Installation
Liquid-cooled 15, 20 and 25 kW Generators