Solar Pump Station and Differential Control
3 Models - Covering up to 1000sq.ft.
of Collector Area
Complete System Control
Variable Speed Pump
Built-in Differential Control
w/ Pump Control
2 Year Limited Warranty
Commercial Solar
Pumping Stations
®
The Lochinvar/TiSUN Commercial Solar Pump Station, complete with Differential Solar Control is an all in one solar
pumping package. Standard features include a differential control with eight different system capabilities, variable speed
pump, air separator, flush and fill valves, safety group, and EPP two piece insulation. Lochinvar can provide the right pump
station to meet almost any solar pumping need.
Available in three sizes, capable of providing flow through up to 1000 square feet of collector area, the Commercial Solar
Pump Station can provide adequate flow through many different size collector arrays.
How it works...
The Lochinvar/TiSUN Commercial Solar Pump Station with Solar Differential Control constantly
monitors the collector temperature and the tank temperature. As the tank temperature cools below
setpoint and the difference between the two temperatures reaches a field adjustable setpoint, the
differential control will start the circulation pump. If the variable speed pump feature is utilized
the solar differential control will adjust the speed of the pump to achieve the highest temperature
difference between the collector and the tank.
This large temperature difference will harvest the solar heat in the most efficient manner possible.
If the constant flow feature is used the pump will operate at a steady speed. The pump will
continue to operate until the tank reaches its desired temperature or there is no longer sufficient
difference between the collector and the tank temperature to heat the tank.
Outstanding Features
SD Card
145 PSI Relief Valve
Supply/Return Multi-Function
Valve with Thermometer and
Check Valve
Pressure Gauge
• Graphical LED Interface with Backlight
• Data Logging with SD Card
Fill and Flush Valve
with Shut-off
• Two Collector Sensors
• Two Tank Sensors
• Electronic Flow Sensor
• BTU Metering
• 8 System Functionality
- One or Two Collector Fields
- One or Two Tanks
- Two Pumps, One Diverter Valve
• 3 Outputs, 2 For Pump Speed Regulation
(PWM Signal)
• Impulse Flow Sensor Input
• SD Software
Variable Speed
Circulation Pump
Fill and Flush Valve
with Shut-off
EPP, Two Part
Insulation Shell
VFS Flow Sensor
EPP Heat Insulation
2
Selectable System Configurations
The differential control has eight preset system types that can be selected to match control logic to system type.
For example if you had one collector array and one tank the control scheme would match System 1. There is a preset
system program for different system types.
System 1
System 2
Basic system with 1 tank,
1 pump, 1 collector array,
and 2 sensors.
Extra functionality can be added
with 1 or 2 sensors for booster
pump, thermostat, cooling,
differential control or
anti-stagnation.
T1
T2
System 3
T2
T2
System with 1 tank, 1 pump,
1 diverter valve, 2 collector arrays,
and 3 sensors.
Extra functionality can be added
with 1 sensor for thermostat,
cooling or anti-stagnation.
T4
T1
T4
T2
System 5
T1
T4
System 4
System with 2 tanks, 2 pumps, 1
collector array, and 3 sensors.
Extra functionality can be added
with 1 sensor for thermostat,
cooling or anti-stagnation.
T1
System with 2 tanks, 1 pump,
1 diverter valve, 1 collector array,
and 3 sensors.
Extra functionality can be added
with 1 sensor for thermostat,
cooling or anti-stagnation.
T1
System 6
System with 1 tank, 2 pumps, and
2 collector arrays, and 3 sensors.
Extra functionality can be added
with 1 sensor for thermostat,
cooling or anti-stagnation.
T4
T1
T3
T4
T2
T2
System 7
System with 1 pump, 1 tank,
1 collector array, 1 diverter valve,
and 4 sensors.
Extra functionality can be added
with 1 sensor for thermostat,
cooling or anti-stagnation.
System 8
System with 1 tank, 2 pumps,
1 collector array, 1 external heat
exchanger, and 2 sensors.
Add extra functionality with 1
sensor for thermostat, cooling,
anti-stagnation or differential
control.
T1
T2
System with 1 tank, 2 pumps,
1 collector array, 1 external heat
exchanger, and 3 sensors.
Extra functionality can be added
with 1 sensor for thermostat,
cooling or anti-stagnation.
T1
T2
T4
Extra Programmable Functions
In addition to the eight preset system types, the Lochinvar/TiSUN Solar Pump Station with Differential Control has four extra
functions that can be added to many of the system types to expand the system’s functionality. Extra functions include a
thermostat output for enabling an external heat source, a cooling function for keeping the tank at a usable temperature during
times of high solar radiation, an anti-stagnation function to keep the collector at a usable temperature during times of low or no
hot water demand, and a differential control function that can be used to prioritize the heat distributed to additional heat loads.
Thermostat
Cooling
Cooling function for keeps
the tank at a usable
temperature during times
of high solar radiation
T1
T3
Thermostat output enables
an external heat source.
T1
T3
P3
P1
P3
P1
T2
T2
Differential Control
Anti-Stagnation
T1
T3
T4
P3
P1
Differential control
function that can be
used to prioritize the
heat distributed to
additional heat loads.
Anti-stagnation function to
keep the collector at a usable
temperature during times of
low or no hot water demand.
T1
P3
P1
T2
T2
3
Solar Pump Station Dimensions
Models SPS0250 & SPS0500
7-1/2"
1/2" WATER
CONNECTIONS
9-3/4"
1-1/2"
1-3/4"
4-1/2"
14"
12-1/4"
4-1/2"
3/4" WATER
CONNECTIONS
5"
Models SPS1000
7-1/4"
5"
1/2" WATER
CONNECTIONS
14"
9-3/4"
1-12"
1-3/4"
12"
4-1/2"
1" WATER
CONNECTIONS
Model
Max. Collector
Area Served
SPS0250
SPS0500
SPS1000
250 ft2
500 ft2
1000 ft2
Connection
Size
Pump
Model
3/4”
3/4”
UPS 28/88U
UPS 25/99U
1”
UP 25/120U
2 year limited warranty
B
A
NO
SE
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E
LOC
HI
ION
AT
AR CORPOR
NV
N, TENN
ES
Lochinvar Corporation • 300 Maddox Simpson Pkwy • Lebanon, TN 37090 • 615-889-8900 / Fax: 615-547-1000
www.Lochinvar.com
SPS-01
FG-10M-9/10–Printed in U.S.A.