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11 

6.3.6

 

EXPANSION VESSEL SIZING 

The following information is based on an inlet pressure of 3.5 bar.  If a different inlet pressure is to be 
used, please consult BS6700. 
V V = S V * e 
             0.45 
Where: 
V V 

Vessel Volume 

S V 

System Volume 

Coefficient of Expansion  (See Table 5.1) 

 

Stored Temp.

30 

35 

40 

45 

50 

55 

60 

0.005 

0.006 

0.008 

0.010 

0.012 

0.015 

0.017 

Stored Temp.

65 

70 

75 

80 

82 

85 

90 

0.020 

0.023 

0.026 

0.030 

0.031 

0.033 

0.037 

 

6.3.7

 

COEFFICIENT OF EXPANSION OF WATER AT 3.5 BAR INLET PRESSURE 

 

6.4

 

DE-STRATIFICATION 

 

6.4.1

 

GENERAL 

The De-stratification Pump Kit works by using a pump to circulate water from the top of the vessel to 
the  bottom  of  the  vessel.    This  action  ensures  that  the  water  held  in  the  unit  is  maintained  at  a 
consistent temperature throughout.  By achieving a uniformed stored water temperature of at least 
60°C, the risk of any bacterial contamination is virtually eliminated.  
If the SST is to be installed alongside a circulating water heater then a De-stratification pump may not 
be required due to the high turbulent flow created by the matched primary shunt pump supplied. 
 
Systems that have a building loop incorporated onto the vessel may not require a De-stratification kit, 
as the circulation around the building from the top of the vessel back to the bottom should provide 
sufficient mixing. 
 

6.4.2

 

REQUIREMENTS 

Lochinvar has developed this kit to meet the stringent recommendations of both the HSE Approved 
Code  of  Practice  L8  and  Department  of  Health  Memorandum  HTM  04-01  relating  to  the  control  of 
legionella.  For full compliance, a timer should be used to operate the pump for a period of at least 1 
hour each day.   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Содержание SST Series

Страница 1: ...Models SST66 SST110 SST165 SST220 Installation manual_SST_JANUARY 2019 SST DIRECT STORAGE VESSEL Installation Commissioning Maintenance and User instructions...

Страница 2: ...1...

Страница 3: ...MMENDED PIPEWORK FOR A CONDENSING CIRCULATING APPLIANCE 8 6 3 2 RECOMMENDED PIPEWORK FOR A STORAGE APPLIANCE 8 6 3 3 TEMPERATURE AND PRESSURE RELIEF VALVE 9 6 3 4 RELIEF VALVE DISCHARGE PIPEWORK 9 6 3...

Страница 4: ...g stage All installations must conform to the relevant Building Regulations Health Safety requirements must also be taken into account when installing any equipment Failure to comply with the above ma...

Страница 5: ...symbol added to a yellow triangle with black edges indicates danger ACTION REQUIRED A white symbol inserted in a blue circle indicates an action that must be taken to avoid risk READ AND UNDERSTAND TH...

Страница 6: ...750 2055 1550 1030 530 445 410 375 290 SST220 1000 1907 1080 1536 1221 906 591 506 471 436 351 2 2 1 CONNECTION HEIGHTS AND DIMENSIONS No Description Size BSP Model reference 1 Spare 1 All 2 Hot Outle...

Страница 7: ...ign installation testing and maintenance of services supplying water for domestic use within buildings and their curtilages BS 7074 1989 Application selection and installation of expansion vessels and...

Страница 8: ...e appliances please contact Lochinvar Limited 6 2 1 RECOMMENDED PIPEWORK FOR A CONDENSING CIRCULATING APPLIANCE 6 2 2 RECOMMENDED PIPEWORK FOR A STORAGE APPLIANCE BUILDING RETURN BUILDING FLOW IV STOR...

Страница 9: ...and must comply with The Building Regulations Part G3 in England and Wales P5 in Northern Ireland and P3 in Scotland A kit of components that have been suitably sized for the unvented or boosted oper...

Страница 10: ...d maintenance of services supplying water for domestic use within buildings and their curtilages b Have a vertical section of pipe at least 300mm long below the tundish before any elbows or bends in t...

Страница 11: ...TAL DISCHARGE PIPE D1 FROM TEMPERATURE RELIEF VALVE TO TUNDISH SAFETY DEVICE e g TEMPERATURE RELIEF VALVE DISCHARGE PIPE D2 FROM TUNDISH WITH CONTINUOUS FALL FIXED GRATING TRAPPED GULLY DISCHARGE IDEA...

Страница 12: ...d at a consistent temperature throughout By achieving a uniformed stored water temperature of at least 60 C the risk of any bacterial contamination is virtually eliminated If the SST is to be installe...

Страница 13: ...ouble free operation Even if a maintenance schedule is determined to be less than annually it is important that all controls and safety features are checked for correct operation on an annual basis 8...

Страница 14: ...r fixture to allow air to escape 3 Open the cold water supply to water heater and allow the vessel to fill 4 Check for water leakage 8 6OTHER CHECKS 8 6 1 RELIEF VALVE At least once a year the tempera...

Страница 15: ...the water may sometimes appear milky This is due to very tiny air bubbles in the water which will clear very quickly Warning If cold warm water exits from the temperature and pressure relief valve TP...

Страница 16: ...15...

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