Page 1
SL-PS-I-O Rev B
Solar Pump Station
Installation and Operation
Manual
SPS0250, SPS0500 & SPS1000
WARNING:
Save this manual for future reference.
This manual must only be used
by a qualified heating installer/
service technician. Read all
instructions, before installing.
Perform steps in the order given.
Failure to comply could result in
severe personal injury, death, or
substantial property damage.
Page 2
Contents
HAZARD DEFINITIONS .................................................... 2
1. GENERAL INFORMATION
Included components ..................................................... 3-4
2. INSTALLING THE SOLAR STATION
Installing the solar station on a wall ................................... 5
Installing the relief valve ..................................................... 5
Installation, wall bracket for expansion tank ...................... 5
Installation, connection lines to tank and collector ............ 5
Piping .......................................................................... 5
Clamp ring screw connections ................................... 5
3. TECHNOLOGY, INSTALLATION AND
COMMISSIONING
Clamp ring screw connections .......................................... 6
Operation, multi-function ball valve and check valve .......... 6
4. COMMISSIONING THE SOLAR SYSTEM
General .............................................................................. 7
Flat seal screw connections .............................................. 7
Filling, flushing and bleeding ............................................. 7
5. PRESSURE LOSS AND RESIDUAL
DELIVERY HEIGHT ..................................................... 8
6. VFS FLOW SENSOR .................................................. 9
7. TECHNICAL DATA FOR SOLAR STATION ........ 10-11
8. COMPONENT BREAKDOWN
SPS0250 ......................................................................... 12
SPS0500 ...........................................................................12
SPS1000 ...........................................................................13
9. SERVICE
Air separator .................................................................... 14
Flat seal screw connections ............................................ 14
Clamp ring screw connections ........................................ 14
Disassembling the solar station ........................................14
Draining the system .......................................................... 14
10. FAULTS, CAUSES AND RECTIFICATIONS
Pump doesn’t run when power is switched on .................15
Motor blocked ....................................................................15
Pump noise .......................................................................15
Revision Notes ................................................. Back Cover
Hazard definitions
The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or
to important information concerning the life of the product.
DANGER
DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious
injury.
WARNING
CAUTION
CAUTION
NOTICE
WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious
injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate
injury.
CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not
avoided, may result in property damage.
NOTICE indicates special instructions on installation, operation, or maintenance that are important but not
related to personal injury or property damage.
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Page 3
1 General Information
SL-PS Installation & Operation Manual
WARNING
WARNING
WARNING
WARNING
Before starting work, the Installer must read, understand and note these installation and operating
instructions.
The solar pump station may only be installed and maintained by trained professionals. Trainees may
only work on the product under the supervision of an experienced person.
All instructions in this Installation & Operation manual should be observed when using the solar
station. No other form of use is intended.The manufacturer is not liable for any damage resulting from
misuse of the solar station. For safety reasons, modifications or changes are not permitted.
■ The solar station must be installed as far away from the collectors as possible. Extremely high
temperatures may occur in the pipes near the collectors. If installing in attic space, ensure that
the instruments do not overheat.
■ The pressure / temperature operating parameters must be within the prescribed limits. Excess
operating temperatures should be avoided for continuous operation.
■ The provisions stated in DIN EN 12976-1 should be observed when installing solar systems.
■ The expansion tank should be regularly checked according to DIN 4807.
■ Solar systems should be grounded to protect against lightning.
■ The system’s electrical connection for sensors and voltage supply should only be established by a
trained professional. The relevant specifications (VDE 0100, VDE 0185, VDE 0190 etc.) should
be observed as well as special local (construction) requirements. (Grey cable = tank, black cable
= collector)
WARNING
WARNING
WARNING
WARNING
■ The solar pump station’s componentry varies depending on type and equipment.
■ The diagrams used are examples.
■ Subject to technical changes and further developments.
A properly sized expansion tank must be used to avoid damage to the solar thermal system.
Thermal expansion tanks should be sized to account for 1.5 times the solar system circuit volume.
The expansion tank may be hot, ensure that scalding does not occur.
Failure to heed these instructions, especially the safety instructions, can result in the destruction of and
defects on the expansion tank, endanger persons, and impair the operation.
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1 General Information
SL-PS Installation & Operation Manual
Included Components
Solar Station:
■ Grundfos solar circulation pump
■ VFS sensor (flow sensor)
■ 145 psi relief valve, with pressure gauge
■ Multi-function instruments (Flow Check, Thermometer,
Fill Valve)
■ EPP two-part bracket with mounting kit
Installation kit:
■ Wall and tank bracket with mounting kit
Solar Control unit:
■ LCD Plus solar control unit with integrated energy balance
function.
■ 2 collector and 2 tank sensors Pt 1000
Technical documentation:
Figure 1-2 SPS1000
■ Operation and installation instructions (with appendix) for
pump and solar control unit.
Figure 1-1 SPS0250/ SPS0500
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Page 5
2 Installing the solar station
SL-PS Installation & Operation Manual
Installing the solar station on a wall
■ Remove front insulation shell.
■ The solar pump station forms a single unit with the wall
bracket and rear insulation shell. Secure both components
as a complete unit at the intended location, working the
front and using anchors and screws suitable for the wall
construction type.
Installing the relief valve
■ The solar station is equipped with a solar safety relief valve
which meets the relevant requirements.
■ Fit the enclosed relief valve to the outlet of the return
instruments above the pump using the 3/4" union nuts. A
gasket is enclosed with the solar station for use when
installing the relief valve.
■ The enclosed discharge connection bracket should be fitted
to the safety valve so that there is no risk of scalding should
liquid escape. Follow local codes for drainage piping.
The following information should be noted:
■ The safety valve must be easily accessible.
Installation, wall bracket for expansion
tank: (Lochinvar/TiSUN accessories)
■ Fit the wall bracket for the expansion tank (if equipped) to
the right of the solar station.
■ Ensure that the corrugated stainless steel hose is long
enough for the connection between the pump station and
the expansion tank, not forgetting the expansion coupling.
Installation, connection lines to tank and
collector
A) Piping
■ Connect the lines between the solar pump station and tank.
■ Connect supply and return lines to the collectors.
B) Clamp ring screw connections
■ Refer to Section 3: Technology, installation and commissioning,
on page 6.
■ No valves should be placed between relief valve and pump
station. The relief valve should be piped to a suitable drain
as close as possible to the pump station with no reducing
couplings or other restrictions. The piping must be sloping
away from the pump station at all times.
■ Dirt traps or other constrictions are not permitted between
the collectors (field) and safety valve.
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Page 6
SL-PS Installation & Operation Manual
3 Technology, installation and commissioning
Clamp ring screw connections
■ Cut the copper pipe to length and deburr.
■ First, slide the clamp ring nut over the pipe, then slide the
clamp ring.
■ Insert the prepared pipe into the screw connection until its
stop is reached.
■ Tighten clamp ring nut by hand.
■ Use open-ended wrench to tighten clamp ring screw
connection (approx. 33 Ft lb), re-tighten if necessary.
■ When tightening the clamp ring screw connection, use two
wrenches–using one wrench to prevent the pumping station
from turning.
Flat seal screw connections
■ All pre-fitted solar station screw connections are firmly
tightened in the factory so that they do not need to be
retightened.
Torque levels when tightening flat seal screw connections
using AFM 34 flat seals, s = 2mm.
Figure 4-1 Forward flow multi-functioning instruments
SETTING FOR OPERATIONS,
FILLING, FLUSHING, DRAINING
FLOW CHECK CLOSED
BALL VALVE OPEN
DRAINING
FLOW CHECK OPEN
BALL VALVE 1/2 OPEN
SERVICE
BALL VALVE
CLOSED
Figure 4-2 Return multi-functioning instruments
SETTING FOR OPERATIONS
FLOW CHECK CLOSED
BALL VALVE OPEN
DRAINING
FLOW CHECK OPEN
BALL VALVE 1/2 OPEN
SERVICE, FILLING FLUSHING
BALL VALVE CLOSED
– 3/4" screw connection 26 Ft. lb
– 1" screw connection 40 Ft. lb
– 1 1/4" screw connection 66 Ft. lb
– 1 1/2" screw connection 96 Ft. lb
Operation, multi-function ball valve and
check valve
■ The forward flow ball valve must be open for filling, flushing
and bleeding solar systems with a filling and flushing pump.
The return ball valve should be closed.
■ Both flow checks should be opened in order to drain the
solar system (thermometer handles in 45° position).
■ The two mult-function ball valves must be fully open in
order to operate the solar system (turn the red and blue
thermometer handles counter-clockwise until the stop is
reached).
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4 Commissioning the solar system
General
■ Before commissioning, all piping, connections and saftey
equipment should be checked to ensure that they are
correctly installed.
■ Fill the solar system via the filling and flushing pump and
then flush the solar circuit for at least 15 min. to purge all of
the air out of the circuit.
SL-PS Installation & Operation Manual
■ All pre-fitted solar station screw connections are firmly
tightened in the factory so that they do not usually need
retightening.
■ Seal integrity must be tested when commissioning and a
pressure test must be completed.
■ Fill the complete solar system with Lochinvar/TiSUN solar
liquid only. The mixing ratio should be adapted to local
conditions.
■ Never flush or pressure test the complete solar system with
just water. Flushing the system with water only can cause a
freezing hazard.
Filling, flushing and bleeding
■ There is one fill valve with hose connection for filling,
flushing and draining the solar system on both the safety
group and sensor measurement section.
■ Connect the pressure hose (forward flow) to the safety
group’s filling connection under the pressure gauge and
open fill/flush valve.
■ Close the fill/flush valve (return) with the filling and
flushing pump running and increase the system pressure to
60 psi. The system pressure can be read at the
pressure gauge.
■ Close the fill/flush valve (forward flow) and switch off the
filling and flushing pump.
■ Open return ball valve (by turning the blue thermometer
handle 90° counter-clockwise until it stops).
■ The solar system features an air separator. Open the bleeder
valve until the solar liquid exits free of air bubbles.
■ Only if collector bleeder is installed: Bleed the system on the
collector until the solar liquid exits free of bubbles.
■ If necessary, increase the test pressure again to 60
psi and check the system for leaks. If the pressure gauge
shows the pressure dropping substantially, you have a leak
in the system.
■ Set the operating pressure to 60 psi as prescribed by the
system manufacturer
■ Connect the flushing hose (return) to the flushing
connection on the sensor measuring section and open
fill/flush valve.
■ Refer to “Technology, installation and commissioning:
Operation, multi-function ball valve and check valve” on
page 6.
■ Open the supply ball valve (by turning the red thermometer
handle counter-clockwise until it stops).
■ Close return ball valve (by turning the blue thermometer
handle clockwise, until it stops).
■ If necessary, the supply and return check valve can be
opened by moving the thermometer handles to the 45°
position.
■ Put sufficient solar liquid in the tank of a filling and flushing
pump (not supplied). The mixing ratio should be adapted
to local conditions in terms of freeze protection.
■ Start up the circulation pump at maximum speed and allow
liquid to circulate for at least 15 min.
■ Remove the filling station hoses and screw the caps on the
flushing and filling valves.
■ Check the system again for leaks. Use the red and blue
thermometer handles to fully open the forward flow and
return ball valves.
■ Activate speed control on solar control unit. The highest
speed level should be set on the pump (phase control).
Note: The minimum speed set on the solar control unit must
not fall below the pump’s minimum nominal speed.
Note instructions for pump and solar control unit.
■ Once the installation settings have been completed and
checked, fit the solar station’s front insulation shell.
■ Refer to the collector manufacturer’s recommendations for
minimum flow requirements.
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Page 8
SL-PS Installation & Operation Manual
5 Pressure loss and residual delivery height
Figure 5-1
SPS0250
Figure 5-2
SPS0500
Solar group with Grundfos UPS 25-58U pump
(and GF sensor 0.5-3 GPM) residual delivery height
25
20
15
10
Residual delivery height [Ft]
5
0
0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0
Max. residual delivery height
pressure drop of components
Volumetric flow rate [GPM]
Max. residual delivery height
Solar group with Grundfos UPS 25-99U pump
(and GF-Sensor 0.5-10.5 GPM) residual delivery height
35
30
pressure drop of components
Figure 5-3
SPS1000
25
20
15
10
Residual delivery height [Ft]
5
0
0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0
Volumetric flow rate [GPM]
Solar group with Grundfos UP 25-120U pump
(and GF-Sensor 0.5 - 10.5 GPM) residual delivery height
40
35
30
25
20
15
Max. residual delivery height
pressure drop of components
10
Residual delivery height [Ft]
5
0
0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0 7,5 8,0 8,5 9,0 9,5 10,0
Volumetric flow rate [GPM]
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Page 9
6 VFS flow sensor
SL-PS Installation & Operation Manual
■ Vortex flow sensor for liquid media.
■ Measures flow rate and temperature for BTU metering
(energy balance, etc.)
■ Zero wear (no moving parts).
Figure 6-1 VFS 1-12 flow ouput signal
VFS 1-12 output signal ow
Assignment of measurement range: 0.26-3.17 gpm is eq
Flow rate calculation: Q = 0.26gpm +[(U-0.5)V/3V]*2
ual to 0.5-3.5V
.91gpm
Figure 6-2 VFS 1-12 temperature output signal
Figure 6-4 VFS 2-40 temperature output signal
VFS 2-40 output signal temperature
Assignment of measurement range: 32-212° F is equal to 0.5-3.5V
Temperature rate calculation: T =32° F + [(U-0.5)V/3 V]*180° F
Figure 6-5 VFS flow sensor
VFS 1-12 output signal temperature
Assignment of measurement range: 32-212° F i s equal to
Temperature rate calculation: T =32° F + [(U-0.5)V/3V]*180°
Figure 6-3 VFS 2-40 flow output signal
VFS 2-40 output signal ow
Assignment of measurement range: 0.53-10.6gpm is equal to 0.5-3.5V
Flow rate calculation: Q = 0.53gpm +[(U-0.5)V/3V]*10gpm
0.5-3.5V
F
Item Pin Configuration
1 Temperature signal (0.5 to 3.5 relative to pin 3)
2 Flow pressure signal (0.5 to 3.5 relative to pin 3)
3 GND (UV)
4 Voltage Supply (+5 VDC) PELV
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Page 10
7 Technical data for solar station
Designation SPS0250 / SPS0500 SPS1000
SL-PS Installation & Operation Manual
PUMP
SOLAR AND TANK CONNECTIONS
EXPANSION TANK CONNECTION
INSTALLATION OPTIONS
HOLDING PLATE FOR WALL
MOUNTING
MOUNTING MATERIAL FOR WALL
MOUNTING
CENTER SPACING OF THE PIPING
INSULATION
FlOW SENSOR AND MEASURING
SECTION
SPS0250: Grundfos UPS 25 - 58 U SPS1000: Grundfos UP 25 - 120 U
SPS0500: Grundfos UPS 25 - 99 U
3/4" compression 1" compression
1/2" NPT
Wall mounting
With 2 slot holes 5" apart for M6 screws With 2 slot holes 5" apart for M6 screws
Plastic 8x40 mm anchors
6x50 mm clipboard screws
M6 8 zn DIN 912 washers
Forward flow/return spacing: 5" Forward flow/return spacing: 5"
Material: EPP
Thermal conductivity: 0.041 W/(mK)
Max temp: 250°F
Short-term max temp: 355 °F
Height: 14" Height: 14"
Width: 9.75" Width: 9.75"
Depth: 7.5" Depth: 7.5"
SPS0250: VFS 1-12 sensor VFS 2-40 sensor
SPS0500: VFS 2-40 sensor
Materials: Grivory, PPS
Seal material: EPDM
Nominal size: DN 15 / DN20 Nominal size: DN20
Measuring range: .26 –3.17 GPM/ .5 –10.5 GPM Measuring range: .5 – 10.5 GPM
FILLING AND FLUSHING
CONNECTIONS
SAFETY GROUP Multi-function instruments fitted on right including ball valve, flow check and thermometer handles.
FORWARD FLOW BALL VALVE
RETURN BALL VALVE
SOLAR PRESSURE GAUGE
SOLAR SAFETY VALVE
Output signal Q: 0.5 to 3.5 V (proportional to GPM)
Output signal T: 0.5 to 3.5 V (proportional to 32-212°F)
Max pressure: 145 psi
Power supply: 5 V DC
Temperature measuring range: 32°F to 212°F (145 psi)
Temp. min/max: -73°F / 248°F
Forward Flow/ G3/4" with seal cap and Solar 1/2" fill and flush valve
Return/ G3/4” with seal cap and Solar 1/2" fill and flush valve
Complete ball valve 1" /22 mm compression Complete ball valve 1 1/2" / 28 mm compression
Complete ball valve 1" /22 mm compression Complete ball valve 1 1/2" / 28 mm compression
0 – 145 psi, 2" diameter (EN 837-1, CL. 2.5)
Designation: SVE/SOL 100 1/2" Solar Designation: SVE/SOL 3/4" Solar
Standard /certificate: DIN EN 12164 CW 617N/
TÜV SV 07-2008
Nominal pressure 145 psi
Response pressure 145 psi
Max temp 320 °F
Glycol-water mixture max. 50%
DIN EN 12164 CW 617N / TÜV SV 07-2008
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Page 11
SL-PS Installation & Operation Manual
7 Technical data for solar station (continued)
Designation SPS0250 / SPS0500 SPS1000
Installation location: forward flow and return ball valves
Material: Brass
GRAVITY BRAKES
SOLAR DIAL INDICATOR
THERMOMETER
FLAT SEALS FOR PUMP
FLAT SEAL FOR SAFETY GROUP
BLEEDER PIPE
Opening pressure: 2 x 200 mm WS (using metal spring)
Can be positioned by moving thermometer handle to 45°F position
Size: 30 x 22 x 2 - 1" Size: 44.5 x 33 x 2 - 1 1/2"
Long-term temperature: Liquid 482°F, water vapor 360°F
Long-term temperature: Liquid 482°F, water vapor 392°F
Series: Solar 8010 compression 22 mm compres. Series: Solar 8010 compression 28 mm compres.
Connection: M28 x 1.5 / 22 mm / 3/8" female Connection: M36 x 1.5 / 28 mm / 3/8" female
Seal: O-ring 70 EPDM 291
Max temp 356°F
Scale: 32 - 288°F in 3.6 F increments
Diameter: 2"
Material: AFM 34 light grey
Peak temp. briefly: 720°F
Size: 17 x 24 x 2 - 3/4"
Material: AFM 34 light grey
Peak temp. briefly: 752°F
Type SER-RDT
Length: 9.25 ft
3/8" bleeder valve can be shut off manually
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Page 12
SL-PS Installation & Operation Manual
8 Component breakdown
SPS0250/ SPS0500
Item Name
– SPS0250 - Pumpstation 250 sq-ft w/ flow sensor and CU
– SPS0500 - Pumpstation 500 sq-ft w/ flow sensor and CU
1 Solar return ball valve USA 1 1/2" x M28 x 1.5
2 Solar forw. flow ball valve USA M28 x 1.5M28
3 Solar bleeder block M28 x 1.5 L=283mm
4 Nut M28 x 1.5mm
5 Clamp ring 22mm
6 Clamp ring 22.3 mm USA
7 Nut 1 1/2" x 16mm
8 Reducing socket 1 1/2" female x 1" male
9 Sealing kit 2x 1 1/2" ; 2x 1" ; 3x 3/4" ; 1x 1/2"
10 Solar cross piece cpl. USA 145 psi safety valve cpl.
11
12
SPS0250- UPS 25/58U - 1 1/2" - 180-F12K03 115V60Hz
SPS0500- UPS 25/99U - 1 1/2" - 180-F12K09 115V 60Hz
13 Solar control unit LCD plus USA 115 Volt w/ SD-card
14
SPS0250-Sensor direct 0.26-3.17 gpm w/ cable
SPS0500-Sensor direct 0.50-10.5 gpm w/ cable
15 Power cord USA w/ AC-plug XYTP
16 Control unit bracket
17 Red thermometer handle L=92mm RAL 3020
18 Blue thermometer handle L=92mm RAL 5010
19 Thermometer D51 L=100.5 0/160°C - 40/320°F
20 Wall bracket for pumpstation 250/500 sq-ft
21 Retaining clamp cropped Spring wire 2mm
22 Sealing kit 2x 1 1/2" ; 2x 1" ; 3x 3/4" ; 1x 1/2"
23 Mounting kit S8x50/D10x50 anchors / screws
24
25 Additional insulation D=42mm/DN32
26 Additional insulation L=190mm machined
27
28 Cover white-alu RAL9006 Type B w/ control unit cutout
Flow sensor housing 0.26-3.17 gpm cpl. w/ fill/ flush valve USA
Flow sensor housing 0.50-10.5 gpm cpl. w/ fill/flush valve USA
Insulation SPS0250 machined for pump and control unit
Insulation SPS0500 machined for pump and control unit
Cover white-alu RAL9006 Type C
Cover white-alu bottom RAL9006 Type B
Cover white-alu top RAL9006 Type B
Figure 9-1 SPS0250
12
4+5
12+15
25
8+9
22
14
4
6
20
2
3
11
23
16
17 19 1
26
13
30 27
10
18
7+9
21
24
Page 13
SL-PS Installation & Operation Manual
8 Component breakdown (continued)
SPS1000
Item Name
– Pumpstation 1000 sq-ft w/ flow sensor and CU
1 Solar return ball valve 1 1/2" Fl. x M36 x 1.5 incl. CV
2 Solar forw. flow ball valve M28 x 1.5 x M36 x 1.5 incl. CV
3 Solar bleeder block M36 x 1.5 L=283mm
4 Nut M28 x 1.5mm
5 Clamp ring 22mm
6 Nut M36 x 1.5 x 28.3
7 Clamp ring 28mm
8 Nut 1 1/2" x 16mm
9 Nut M36 x 1.5 x 28.7 for KVSR 28.7
10 Clamp ring 28.7 mm
11 Reducing socket 1 1/2 female x 1" male
12 Reducing piece M36 x 1.5 male
13 Reducing piece M36 x 1.5 KVSR 28.7 x D28mm
14 Sealing kit 2x 1 1/2" ; 2x 1" ; 3x 3/4" ; 1x 1/2"
15 2x 1" AFM 34
16 Solar cross piece cpl. USA w/ reducing pc. and cap
17 Flow sensor housing 0.50-10.5 gpm w/ fill/flush valve USA
18 Safety group KS0150 USA
19 Solar control unit LCD plus USA 115 Volt w/ SD-card
20 UP 25/120U - 1 1/2" - 180F12K9UL 115V 60Hz
21 Sensor direct 0.50- 10.5gpm w/ cable
22 Power cord USA w/ AC-plug XYTP
23 Control unit bracket
24 Red thermometer handle L=92mm RAL 3020
25 Blue thermometer handle L=92mm RAL 5010
26 Thermometer D51 L= 100.5 0/160°C - 40/320°F
27 Wall bracket for pumpstation 1000 sq-ft
28 Retaining clamp cropped, spring wire 2mm
29 Mounting kit S8x50/D10x50 anchors / screws
30 Insulation SPS1000 machined for pump and control unit
31 Additional insulation D=42mm/DN32
32 Additional insulation L=190mm machined
33 Cover white-alu bottom RAL9006 Type B
34 Cover white-alu top RAL9006 Type B
35 Cover white-alu RAL9006 Type B w/ control unit cutout
Figure 9-2 SPS1000
4+5
6+7
20+22
10 24
27
2
3
19
30
31
11
1
18
8 25
26
16
28
33
34
35
13
9
13
29
21 4
12
23 32
17
Page 14
9 Service
SL-PS Installation & Operation Manual
WARNING
De-energize and lock the solar control
and pump to prevent them from
accidentally being switched back on
again by mistake before any maintenance
or repair work.
Service is not permitted until components
and solar liquid have cooled.
Air separator
■ The solar station features an air separator. Open bleeder
valve until the solar liquid exits free of air bubbles.
■ Check system pressure and top off solar liquid if required.
Flat seal screw connections
■ The screw connections may have to be retightened as the
seals settle. Note tightening torque requirements in the
“Technology: installation and commissioning” section of
this manual.
Clamp ring screw connections
Draining the system
■ Fit corresponding drainage hoses on to the filling and
flushing connections and guide these into a collecting
vessel.
■ Open the check valves by placing the red and blue
thermometer handles in their 45° position.
■ Open the fill/flush valve (return) under the pump.
■ Open the fill/flush vlave (forward flow) on the safety group.
■ Optional: Open the fill/flush valve at lowest point of
system, as close to the tank connection as possible.
■ Open bleeder equipment at highest point (above
collectors).
■ Use an open-ended wrench to retighten clamp ring screw
connections if required (approx. 33 Ft lb).
■ When tightening the clamp ring screw connection, use two
wrenches–one wrench to prevent the pumping station from
turning.
Disassembling the solar station
(Wall bracket, for repairs and service only)
■ Use a screwdriver or similar tool to remove the retaining
springs to the front.
CAUTION
The solar station is now loose. Ensure
that it does not slide forward and out
of the wall bracket.
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Page 15
10 Faults, causes and
rectification
Pump doesn’t run when power is
switched on :
■ Check solar control unit for correct settings and tight wire
connections.
■ Check fuses.
■ Check pump voltage, refer to the pump rating plate for
requirements.
Motor blocked:
■ Close shut-off instruments upstream and downstream of
pump at high liquid temperatures and system pressures.
Allow pump to cool first.
■ Fully unscrew bleed screw and check ease of movement of
pump rotor by turning the slotted shaft end with a
screwdriver; use force to turn if necessary.
SL-PS Installation & Operation Manual
Pump Noise:
■ In the event of cavitation caused by insufficient inlet
pressure, increase primary system pressure within allowable
range.
■ Check speed setting.
If the fault cannot be rectified, please contact your nearest
Lochinvar/TiSUN customer service representative.
15
Page 16
Revision Notes: Revision A (ECO C06520)
initial release.
Revision B (ECO C07610) reflects formatting
adjustments.
SL-PS-I-O Rev B
3/11
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