Solar Thermal Information

61
Operating principle
Installation
·
Construction design
-
Hydraulic characteristics
The single moving part in a spherical motor is a hemispherical
rotor/impeller unit. The rotor/impeller rides on an ultra-hard, wear-
resistant ceramic sphere. There are no conventional shaft bearings or
seals. This eliminates the possibility of bearing-play which is commonly
associated with increased noise and the seal-less design eliminates a
potential leak path. These pumps are particularly robust and provide an
exceptionally long service life in excess of 50,000 hours.The self-
realigning bearing is lubricated and cooled by the fluid media. Mainte-
nance is not necessary under normal conditions. Even after lengthy
shutdown periods a reliable start-up is virtually guaranteed. Parts
exposed to the fluid are completely corrosion resistant even with
aggressive fluids.
favored acceptable not permitted
The pump housing brass is for use in
both solar systems and potable
water. The pump motor is fixed to the
pump housing by the screw ring,
which enables easy removing and
disassembly. The motor has
electronic integrated thermal overload
protection, interference suppressor
and integrated reverse polarity
protection. Power cord double-wire is
red/black for polarity. The pump
motor and the integrated electronic
parts are moisture resistant.
The pump can be fitted either vertically or horizontally, with the motor in
any position, except the motor up.
Electrical connection
Important note: Electrical installations may only be performed by a
properly licensed electrician observing all applicable general and local
codes.
- Connect to a 8-25 V co-current flow power supply, the red wire has
to be connected with positive terminal, the black wire has to be
connected with the negative terminal.
- If the system is not filled with water yet, reduce the time of a function
test to an absolute minimum. Extended dry operation of the pump will
damage the bearing.
Before startup
Flush the system to remove dirt, make sure the system is filled and the
air has been purged. The pump can be switched on. If you hear air
noises initially, these should stop after a short time. Power cycling the
pump several times accelerates the air removal. If the air noise does not
disappear or at least decrease substantially, repurge the system. Avoid
dry run in any case, this will damage the pump.
Startup
- The starting current is much higher than the operating current for a
very short time until the pump is running.
- If the voltage drops because of the high starting current, the pump will
startup.
The pump comes with an integrated overtemperature safety device,
which shuts the pump electronics off when reaching overtemperature.
A complete shutdown after reaching an overtemperature condition can
result in adverse effects on the solar system. Since the temperature of
the electronic components is influenced by the temperature of the
pumped media, the pump will lower its speed automatically after
reaching a critical temperature level in order to avoid a total system
shutdown. However, if the temperature continues to rise because of
too hot of pumped media, the pump will eventually shut down
completely. After cooling down, the pump will restart automatically.
Integrated overtemperature protection
Pump station installation
The DC-ECM solar pump is a direct fit
into the 255 and 256 series solar pump
stations. The DC pump face to face
dimensions and the male union thread
are exactly the same 120V version.
Simply select the 255 or 256 solar pump
station configured without the pump. To
install, remove the pump space pipe and
mount the DC-ECM directly with the
union half nuts. The iSolar 12V and 24
VDC controllers will fit into the front
insultation cover of the 255 and 256
series pump station.
255056A
Dual-line solar station without pump
NA10002 1/2” sweat tail piece, use nut and washer
NA10003 3/4” sweat tail piece, use nut and washer
R50055 Sealing washer, use with nut and tail piece
R61008 Union nut 1” thread, use washer, tail piece
59834A 1” sweat tail piece with nut, use washer
Item Code Description
In-line sweat fittings
256056A Single-line solar station without pump
0
2
4
6
8
10
12
14
0 1 2 3 4 5 6 7
0
10
20
30
40
50
60
- - - - - Power consumption [W]
Pump head [ft]
Flow rate [GPM]
24 Volt in red, 12 Volt in black
For optimum protection against moisture, the SP10 sensor protection
device must be fitted vertically. Unscrew the housing screw and
remove the upper part of the housing. Mark the fastening points on
vertical surface and drill. Attach the lower part of the housing using the
screws. Install the upper part of the housing onto the lower part and
attach housing screw.