Little Giant GP-M231 Serie Manual De Instrucciones página 2

Figure 1.
Figure 2.
Pump must be placed on a hard level surface using a leg accessory kit
available from Little Giant if unable to suspend the pump intake at least
3-1/2" from bottom of basin.
Never place pump directly on clay, earth or gravel surfaces.
Pump can be installed with ABS, PVC, polyethylene or galvanized steel
pipe. Proper adapters are required to connect any non-metal pipe to the
pump discharge if pump is suspended by the discharge on a guide rail
system.
A check valve anti-siphon valve must be used in the discharge line to pre-
vent back flow of liquid into the basin. The check valve should be a free
flow valve that will easily pass solids.
A gate valve should follow the check valve to allow periodic cleaning of the
check valve or removal of the pump.
The remainder of the discharge should be as short as possible with a mini-
mum of turns to minimize friction head loss. Do not restrict the discharge
to sizes below 1-1/4" diameter.
2
Check local electrical and building codes before installation. The instal-
lation must be in accordance with their regulations as well as the most
recent National Electric Code (NEC).
This pump should be connected or wired to a dedicated circuit with no
other outlets or equipment in the circuit line. The circuit breaker should be
of ample capacity in the electrical circuit. See chart below:
H.P. VOLTAGE
2 230
2 208
WINDING RESISTANCE VALUES
HP SPEED VOLTS PH.
2 3450 230 1
2 3450 208 1
The motor windings have a fixed resistance value and must be close
to those given in chart. To check winding resistance values, disconnect
pump cord from control panel and measure resistance at cord end. Refer
to control panel instructions for complete wiring diagram.
T1 Common
T4
T5 Auxiliary
MAINTENANCE
If pump does not operate properly, consult the Troubleshooting Chart. If
trouble cannot be located with the steps shown, consult your pump dealer
or take pump to a Little Giant authorized service center. The Grinder pump
is to be cleaned and sanitized prior to servicing.
CAUTION: When working on pump or switch, always disconnect pump
power cord in addition to shutting off circuit breaker before working on
pump.
CLEANING CUTTER ASSEMBLY,
VOLUTE AND IMPELLER
CAUTION: When working on the pump, always disconnect power cord in
addition to shutting off circuit breaker before working on pump and always
wear eye protection.
WARNING: Do not remove motor house seal plate socket head cap
screws. The motor section of the pump is permanently lubricated with
dielectric oil and sealed at the factory. Removal of these socket head cap
screws by anyone other than an authorized service center will break the
seal and void the warranty.
WARNING: The pump should be thoroughly cleaned of all debris and
deposits before disassembling.
WARNING: This pump is equipped with a cutting mechanism that has very
sharp edges. Caution should be used when working on or near these parts.
1. Lay pump on its side on a smooth hard surface. Prior to removing
the volute, scribe a mark between the seal plate and volute. To gain
access to the rotating cutter, remove the volute by removing the three
flange hex head cap screws. Remove volute by carefully tapping and
prying the volute off the seal plate.
NOTE: Do not damage the seal plate and volute mounting surfaces.
2. To gain access to the stationary cutter, remove the retaining ring by
removing the three flange hex head cap screws. NOTE: The stationary
cutter can be removed from the volute without having to remove the
volute.
3. Remove the stationary cutter from the volute. If the stationary cutter is
worn, it can be turned over once to utilize the other cutter edge. If the
stationary cutter is damaged, it must be replaced.
4. Under good light, inspect the two edges of the rotation cutter. If the
rotation cutter edges appear dull, pitted or otherwise damaged, it
should be replaced.
WIRING
CIRCUIT BREAKER AMPS
20
20
WINDING RESISTANCE IN OHMS
BLACK TO BLACK
WHITE TO RED
1.5 3.9
1.15 3.29
Black
Main White
Red
RED TO
WHITE
5.4
4.44