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9

INDIRECT SYSTEMS

POSSIBLE CAUSE

SOLUTION

Heated water
loss

Leaking water pipes

Check regularly for leaks and repair

PROBLEM

Inoperative 
electric heater

Power supply or booster switch off

Switch on power or booster switch

Blown fuse

Replace fuse

Tripped circuit breaker

Switch on the breaker

Thermostat failure

Replace the thermostat

Low thermostat setting

Adjust the thermostat

Faulty electric element

Check element circuit continuity and
replace the element if faulty 

Water discharge
from pressure
release valve

Pressure above 3 bar

Lift valve hand  lever and reset valve

High mains pressure

Use a pressure tank to regulate and
reduce pressure levels

Pressure is below specification settings

Replace the valve if discharge
continues

Pressure feedback from another device

Check that there is no feedback
pressure from another  device  
connected  to hot reticulation
circuit 

Insufficient
pressure

Inlet water strainer blocked

Unblock the strainer

Unit supply pipework blocked or 
undersized

Unblock the pipe work

Replace with correct pipework

Mains supply pressure below 1 bar

Consult 

supply 

authority 

for

modifications to the system

Pressure control valve flow insufficient
for user’s requirements

Install a large valve but should not 
exceed rated tank pressure of 3.5 
bar

Summary of Contents for ULTRASUN UFD

Page 1: ...Installation Operating Manual ULTRASUN UFD Flatplate Solar Systems...

Page 2: ......

Page 3: ...INDEX Davis Shirtliff Ltd 2020 Contents herein are not warranted 5 INSTALLATION 6 6 SYSTEM COMMISSIONING 7 7 USAGE 7 8 MAINTENANCE 7 9 TROUBLE SHOOTING 8 10 TERMS OF WARRANTY 10 3 WARNINGS SYMBOLS 3...

Page 4: ...e in various tank sizes and collector configurations to suit domestic and small scale institutional applications They are effective and robust products designed for many years of trouble free operatio...

Page 5: ...0 1 X FCP2 4 UFD320DS 3 0 1 7 18 48 12 A B C D E Full Weight kg Empty Weight kg Dimensions mm F 800 1920 2620 2780 700 253 93 600 800 1890 2590 2780 700 270 110 600 800 1890 2590 2780 700 355 135 600...

Page 6: ...ation It is necessary to do so in a safe and workman like manner taking due care of any aspects of the works that could result in injuries to person in or about the building as well as workers passers...

Page 7: ...lectors should be covered while doing so Steam can escape from the expansion relief valve of the solar pump unit if the system is shut down To avoid injuries an expansion relief valve must be connecte...

Page 8: ...irradiation and also assists in the thermosyphon process Heater units should never be laid flat l Avoid any shade especially between 10am and 4pm Shade hugely reduces system efficiency Preferably sola...

Page 9: ...a gravity system or pressurised supply Pressurised systems are preferable as they give higher line pressures up to a maximum of 3 5 Bar Note that in the case of pressurised supply hot and cold lines m...

Page 10: ...nated in the collection capillaries Once primed it is vital to ensure that the system is properly sealed as fluid loss will render the system ineffective The system must therefore be thoroughly checke...

Page 11: ...ow 9 TROUBLE SHOOTING PROBLEM POSSIBLE CAUSE SOLUTION Insufficient hot water High hot water usage at night Rotation use or replace with a larger system Prevailing weather conditions Incorporate compli...

Page 12: ...Lift valve hand lever and reset valve High mains pressure Use a pressure tank to regulate and reduce pressure levels Pressure is below specification settings Replace the valve if discharge continues...

Page 13: ...udes defects caused by fair wear and tear the effects of careless handling lack of maintenance faulty installation incompetence on the part of the equipment user Acts of God or any other cause beyond...

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Page 16: ...INS455A 07 20...

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