Topsflo TD5 Installation & Operating Instructions Manual

Solar Powered DC Circulation Pump

Model TD5

Installation & Operating Instructions

General Information

This pump has been designed to provide versatility and
performance not available in any other high temperature DC
operated pump. It can be powered from any fixed (6V - 24V)
source or directly from a PV Solar Panel. The power level
can be manually selected or the pump can automatically
optimize power draw from a PV panel for maximum flow rate
using advanced MPPT (maximum power point tracking)
technology.
When powered from fixed sources it is suitable for a host of
applications in cars, boats, and RV's that require high
temperature and pressure capability. In Solar Water Heating
systems this pump can be connected directly to a PV panel
eliminating the need for any controllers and sensors.

Areas of Use:

• Solar Water Heating Systems

• Hot Water Circulation

• Radiant Floor Heating

• Heat Transfer Applications

• Cooling Systems

• Food Grade Liquid Transfer

• General High Temperature/Pressure Pumping

General Specifications

Voltage Range 6V-24V
Nominal Operating Voltage 17V
Maximum Fluid Temperature 230ºF
Maximum Fluid Pressure 145 psi
Operating Noise ≤ 45dB
Minimum Start-Up Power ≤2 Watts
Maximum Head 14 ft.
Maximum Flow Rate 5 gpm

Dimensions

Main Features

• Selectable Power Level or full MPPT power optimization

• Brushless and Sealless, nothing to wear out

• Advanced Magnetic Drive Technology

• Durable Permanent Magnet Rotor with Ryton Impeller

• Full Stainless Steel Pump Housing

• Ceramic Shaft

• Designed for Continuous Operation, Rated for 30,000

hours

• All Food Grade Materials

• Quiet

Built-In Protective Functions

• Drive Circuitry will sense dry operation and shut down to
prevent damage

• Will slow operation or stop completely when an
overtemperature condition is detected. This can arise
due to excessive fluid temperature or excessive ambient
temperatures. The pump will automatically recover
when temperatures return to a safe level.

• Protected against overload conditions, such as can
arise if the impeller is stuck due to debris.

• Will detect overvoltage condition and shut down when
voltage exceeds 28V. Will recover automatically when
voltage falls below threshhold.

Performance Characteristics

14

12

10

8

6

4

Head [ft. of water]

2

5W
10W
15W
25W

Materials

• All Wetted Parts are Food Grade

• Stainless Steel Pump Housing

• Ryton Impeller

• Viton “O” Ring

• Ceramic Ferrite Magnet

0

0 1 2 3 4 5 6

Flow Rate [US gallons per minute]

Installation

• The pump shaft should be horizontal. A shaft that is

vertical will cause premature pump failure.

• Observe POLARITY! The red wire must be connected

to the positive side of the power supply, and the black
wire to the negative. Reversing polarity will
IMMEDIATELY DESTROY the electronics in the
pump

• Keep the outside of the pump body dry, and install

such that moisture does not enter the electronics
enclosure. Moisture in the electronics will quickly
destroy the pump.

• Do not allow water inside the pump to freeze. The

expansion of the ice will crack the pump housing

• There is a powerful magnet inside the pump. If your

water contains small particles of iron or other
magnetic materials they will eventually collect on the
magnet and prevent the pump from operating at full
efficiency.

• The pump will not work if it has air in it. Also it cannot

prime itself. For initial operation thoroughly purge the
system of all air.

Current

Selector

Setting

1-1 5W 420 mA 210 mA 5W

2-2 10W 840 mA 420 mA 10W

3-3 15W 1.3 A 630 mA 15W

4-4 25W 2.1 A 1.1 A 25W

5-5 MPPT N/A N/A 5W

Power

with

12VDC

Supply

Current

with

24VDC

Supply

Min. PV

Panel

Rating

Startup Hints

• Make sure the system is purged of all air.
Sometimes small bubbles will remain in the pump and
cause noisy operation. Turning the pump off and on
several times will usually purge the bubbles out of the
pump.

• If you are running the pump from a PV panel it will
take some time before the pump starts in the morning.
PV panels will not produce enough power to run the
pump until they receive full sun.

Troubleshooting

Symptom Cause Solution

Noisy
operation

Pump runs
intermittently

Air bubbles in the
pump,
Running Dry

dry running
protection active

Purge the air
from the pump

purge air from
pump

Power Settings

This pump supports 4 different power settings as well as
full MPPT mode.
It can be operated from a battery (12V or 24V) or any
other DC source at all power settings. Please make sure
your source has enough power to supply the setting you
choose. Do Not use MPPT when connecting to a fixed DC
supply.
For direct connection to a PV panel (without battery or
charge controller) you can use MPPT mode or fixed
power mode. In MPPT mode the pump will seek to
optimize its power, constantly adapting to the
characteristics of the PV panel and the amount of
sunlight. In fixed power mode it will draw the amount of
power from the panel corresponding to the setting. In this
mode your panel must have enough power to support the
setting. It is possible to use a large PV panel (over 25W)
as long as the open circuit voltage is below 26V. If your
PV panel has a higher open circuit voltage the pump may
shut itself down.

Pump won't
run

overtemperature
protection active

Incorrect polarity complete

moisture in

wait until pump
cools down

replacement

electronics

input power
insufficient

provide
specified power
supply

dirt in the pump clean inside of

pump housing

Imported by HELIATOS SOLAR

Hybrid Solar Water Heating Systems

www.heliatos.com

661 7SOLAR7

[e-mail]