Homa AM***-C, Instruction Manual

Page: 43 / 72

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No. Description
1 Manufacturer’s address
2 Motor type
3 Max. liquid temperature
4 Max. submersion
5 Protection class
6 No. of pump
7 Year of manufacture
8 Speed [min-1]
9 Insulation class
10 Frequency [Hz]
11 Weight [kg]
12 No. of phases
13 Motor input P1 / Motor output P2
14 Voltage [V]
15 Nominal current [A]
16 Cos
φ
17 Pump type
18 Max. Head
19 Min. Head
20 Max. Flow
21 FM approval with temperature code
22 Nema Code Letter
23 Motor output P2
3.3.2. Motor
The three-phase asynchronous motor is made from sheet
metal with a double-varnished winding wire as well as the
motor shaft with rotor package. The power supply cable is
designed for the maximum mechanical load and is sealed
against water pressure from the pumped liquid. The mo-
tor cable lead connections are sealed from the pumped
liquid as well. The bearings used are permanently lubri-
cated maintenance-free antifriction bearings. All models
are available with explosion proof motors according to FM
Class I, Division 1, Groups C & D.
General motor data
Service factor 1.15
Operating mode S1
Max. liquid temperature 35°C / 95°F
Insulation class H (180°C / 356°F)
Degree of ptotection IP68
Cable length 10 m
Rotor shaft seal Silicon-carbide / Silicon-carbide
mechanical shaft seal Silicon-carbide / Silicon-carbide
Bearing one grooved ball bearing
(above)
one double-row type angular
ball bearing (below)
3.3.3. Control devices
The pump is equipped with various safety and control
devices:
Motor Version
C... Temperature monitoring in the winding
C.../C Temperature monitoring in the winding , Oil chamber
seal conditions sensor
C...FM Temperature monitoring in the winding , Explosion proof
C.../C FM Temperature monitoring in the winding , Oil chamber
seal conditions sensor, Explosion proof
D... Temperature monitoring in the winding
D.../C Temperature monitoring in the winding , Oil chamber
seal conditions sensor
D...FM Temperature monitoring in the winding , Explosion proof
D.../C FM Temperature monitoring in the winding , Oil chamber
seal conditions sensor, Explosion proof
Temperature Sensors
The pumps have a set of temperature sensors built in the
stator windings.
Standard models have the sensors connected to the mo-
tor power supply cable, the wire ends marked T1 and T3.
They must be connected to the safety circuit of the con-
trol box in order to provide an automatic re-start of the
motor, when the motor cools.
Explosion proof models with motors up to 15 kW have a
set of temperature sensors built-in, with a higher switch-
off temperature, connected to the motor cable, the wire
ends marked T1 and T2. They must be connected to a
special relay in the starter box in order to provide manual
pump re-start.
All explosion proof models have both sets of sensors built-
in, as described above, with wire ends marked T1, T2,
T3. They have to be connected accordingly as described
above. The temperature sensor set must be connected to
the switchgear unit so that it switches off if it overheats.
Switch-off temperature of the sensors:
Motor Stator winding Normal
T1+T3 Regulator Stator winding Ex
T1+T2 Limiter
AM122…C-2/4pol 140°C / 284°F 140°C / 284°F
AM136…D-2/4/6pol 140°C / 284°F 140°C / 284°F
Check of Direction of Rotation
On original HOMA control boxes a control-light is illu-
minated, if the direction of rotation is not correct. With
smaller pumps the direction of rotation may be checked
by watching the start-jek. Put the pump vertical on the
ground and lift one edge. Start the motor. Viewed from
above, the unit must jerk anti-clockwise as the correct di-
rection of rotation is clockwise.