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15

Maintenance Requirements

Unvented hot water systems have a continuing 

maintenance  requirement  in  order  to  ensure  safe 

working  and  optimum  performance.  It  is  essential 

that the relief valve(s) are periodically inspected and 

manually opened to ensure no blockage has occurred 

in the valves or discharge pipework.

Similarly  cleaning  of  the  strainer  element  and 

replacement of the air in the expansion vessel will help 

to prevent possible operational faults.

The maintenance checks described below should be 

performed by a competent person on a regular basis, 

e.g. annually to coincide with boiler maintenance.

After any maintenance, please complete the relevant 

Service  Interval  Record  section  of  the  Benchmark 

Checklist on Page 21 of this document.

Inspection

The immersion heater boss can be used as an access 

for inspecting the cylinder internally.

Safety Valve Operation

Manually operate the temperature/pressure relief valve 

for a few seconds. Check water is discharged and that it 

flows freely through the tundish and discharge pipework. 

Check valve reseats correctly when released. 

NOTE: Water discharged may be very hot!

Repeat the above procedure for the expansion relief 

valve.

Strainer

Turn off the cold water supply, boiler and immersion 

heaters.  The  lowest  hot  water  tap  should  then  be 

opened  to  de-pressurise  the  system.  Remove  the 

pressure reducing cartridge to access the strainer 

mesh. Wash any particulate matter from the strainer 

under  clean  water.  Re-assemble  ensuring  the  seal 

is  correctly  fitted.  DO  NOT  use  any  other  type  of 

sealant.

Descaling Immersion Heater

Before removing the immersion heater the unit must be 

drained. 

Before draining ensure the water, electrical 

supply and boiler are OFF.

 Attach a hosepipe to the 

drain cock having sufficient length to take water to a 

suitable  discharge  point  below  the  level  of  the  unit. 

Open a hot tap close to the unit and open drain cock to 

drain unit. 

Remove the cover to the immersion heater 

housing and disconnect wiring from immersion heater. 

Carefully remove the thermostat capillaries. Note. the  

order of the capillaries within the pocket. Remove the 

terminal shroud. Unscrew immersion heater backnut 

and  remove  immersion  heater  from  the  unit. A  key 

spanner  is  supplied  with  the  cylinder  unit  for  easy 

removal/tightening of the immersion heater.

Over time the immersion heater gasket may become 

stuck to the mating surface. To break the seal insert a 

round bladed screwdriver into one of the pockets on 

the immersion heater and gently lever up and down.

 

Carefully  remove  any  scale  from  the  surface  of  the 

element. 

DO NOT

 use a sharp implement as

damage  to  the  element  surface  could  be  caused. 

Ensure sealing surfaces are clean and seals are

undamaged, if in doubt fit a new gasket

(part number 70 351 65).

 

Replace immersion heater ensuring the (right angled) 

element hangs vertically downwards towards the base 

of the unit. It may be helpful to support the immersion 

heater  using  a  round  bladed  screwdriver  inserted 

into one of the thermostat pockets whilst the backnut 

is  tightened.  Replace  the  terminal  shroud.  Connect  

wiring  to  element.  Check,  and  close  and  secure 

immersion heater housing cover.

Expansion Vessel Charge Pressure

While  system  is  de-pressurised  check  expansion 

vessel  charge  pressure.  Remove  the  dust  cap  on 

top  of  the  vessel.  Check  the  charge  pressure  using 

a tyre pressur

e gauge. The pressure (with system de-

pressurised) should be 0.35MPa (3.5 bar). If it is lower 

than the required setting it should be re-charged using 

a tyre pump (Schrader valve type). DO NOT OVER-

CHARGE.  Re-check  the  pressure  and  when  correct 

replace the dust cap.

Re-commissioning

 

Check  all  electrical  and  plumbing  connections  are 

secure.  Close  the  drain  cock. 

DO NOT switch on 

the immersion heater(s) or boiler while the unit 

is empty. 

With a hot tap open, turn on the cold water 

supply and allow unit to refill. When water flows from the 

hot tap allow to flow for a short while to purge air and 

flush through any disturbed particles. Close hot tap and 

then open successive hot taps in system to purge any 

air. When completely full and purged check system for 

leaks. Replace and secure immersion heater housing 

cover. The heating source (immersion heater or boiler) 

can then be switched on.

Maintenance

Содержание Zircon 190 S Ind

Страница 1: ...xpansion vessel mounting bracket Tundish 2 Port motorised valve Compression nuts olives Immersion heater spanner Installation servicing instructions Guarantee card IMPORTANT Please read understand all these instructions before commencing installation Please leave this manual with the customer for future reference Zircon Installation Manual Unvented Solar Indirect Water Heaters Installation Servici...

Страница 2: ...ons Section G3 The following instructions are offered as a guide to installation which must be carried out by a competent plumbing and electrical installer in accordance with Building Regulation G3 The Building Standards Scotland Regulations 1990 or The Building Regulations Northern Ireland NOTE Prior to installation the unit should be stored in an upright position in an area free from excessive d...

Страница 3: ...er supply to the property will be supplying both the hot and cold water requirements simultaneously It is recommended that the maximum water demand is assessed and the water supply checked to ensure this demand can be satisfactorily met Note A high mains water pressure will not always guarantee high flow rates Wherever possible the mains supply pipe should be 22mm We suggest the minimum supply req...

Страница 4: ...IRCUIT CONTROL OF THE SOLAR PRIMARY CIRCUIT IS ACHIEVED BYTHE USE OF EXTERNALCONTROLS NOT SUPPLIED WITH THE UNIT CONTROL MUST BEAPURPOSE DESIGNED SOLAR DIFFERENTIAL TEMPERATURE CONTROLLER Checklist Unvented cylinder Cold control pack Tundish Combination valve Expansion vessel Tool Element spanner Compression nuts olives 2 Port motorised valve Literature pack Installation manual Guarantee card Oper...

Страница 5: ...he unit The expansion vessel is pre charged at 0 35MPa 3 5 bar The expansion vessel must be connected between the expansion valve and the cylinder see Fig 06 Page 10 The location of the expansion vessel should allow access to recharge the pressure as and when necessary this can be done using a normal car foot pump It is recommended that the expansion vessel is adequately supported An expansion ves...

Страница 6: ...Rating kW Heat up Time mins Hot Water Capacity ltrs volume of water drawn off 40 C A B C D Solar Auxiliary Solar Indirect 190 S Ind 1401 1085 784 925 65 120 19 14 2 32 132 210 S Ind 1499 1186 1012 1026 85 120 19 15 0 25 196 250 S Ind 1752 1438 1143 1279 95 145 19 15 2 30 237 300 S Ind 2065 1752 1440 1592 120 175 19 17 4 32 265 D B 373 C A 415 SOLAR RETURN SOLAR FLOW COLD INLET HOT OUTLET T P VALVE...

Страница 7: ...ndish 3 54 The tundish should be vertical located in the same space as the unvented hot water storage system and be fitted as close as possible to and lower than the valve with no more than 600mm of pipe between the valve outlet and the tundish see Fig 05 page 9 Note To comply with the Water Supply Water Fittings Regulations the tundish should incorporate a suitable air gap 3 55 Any discharge shou...

Страница 8: ... to prevent contact whilst maintaining visibility and c discharges at high level e g into a metal hopper and metal downpipe with the end of the discharge pipe clearly visible or onto a roof capable of withstanding high temperature discharges of water and 3m from any plastic guttering system that would collect such discharges 3 63 The discharge would consist of high temperature water and steam Asph...

Страница 9: ... ELBOW OR BEND G 1 2 15MM 22mm 28mm 35mm UP TO 9M UP TO 18M UP TO 27M 0 8M 1 0M 1 4M G 3 4 22MM 28mm 35mm 42mm UP TO 9M UP TO 18M UP TO 27M 1 0M 1 4M 1 7M G 1 28MM 35mm 42mm 54mm UP TO 9M UP TO 18M UP TO 27M 1 4M 1 7M 2 3M 600mm maximum 300mm minimum Safety device e g Temperature relief valve Metal discharge pipe D1 from Temperature relief valve to tundish Tundish Discharge below fixed grating Bui...

Страница 10: ...ection if required Cold water combination valve Mains water supply Isolating valve not supplied Discharge pipe Tundish Drain cock not supplied Secondary return if required use swept tee Inlet Boost element Auxillary control housing Solar controls housing Auxillary Primary return Auxillary Primary flow Solar Primary return o Secondary Return Tapping if required ...

Страница 11: ...roller should be fully inserted with the thermal cut out probe into the pocket provided on the SOLAR cylinder The cable must be secured using the cable clamps on the controls housing Connection to the solar controller should be in accordance with the manufacturers instructions The solar controller should be programmed to give a cylinder temperature of approximately 60 C maximum 70 C THERMAL CUT OU...

Страница 12: ...pework from valve outlets to tundish Connection to the primary circuit All connections are 22mm compression However 3 4 BSP parallel threaded fittings can be fitted to the primary coil connections if required Boiler Selection The boiler should have a control thermostat and non self resetting thermal cut out and be compatible with unvented storage water heaters Where use of a boiler without a therm...

Страница 13: ...8 9 10 1 2 3 4 5 6 7 8 9 10 Supply 1 2 3 G 1 Br Bl 2 0 GY 3 G 1 Br Bl 2 0 1 3 2 2 L N Programmer Boiler Pump Zone valve HTG Cylinder terminal block Room stat Zone valve DHW supplied Junction box 3 2 3 L 1 N 2 3 HTG ON DHW ON L N 2 3 1 L 2 N 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 Supply 1 2 3 G W Bl 2 0 GY 3 G 1 Br Bl 2 0 L N Programmer Boiler Pump 3 Port Zone valve Cylinder terminal block 1 3 2 2 R...

Страница 14: ...aximum storage temperature in the cylinder of 70 C 60 C is recommended to minimise scaling Secondary heating coil Fill the secondary circuit following the boiler manufacturer s commissioning instructions To ensure the cylinder primary heat exchanger is filled the 2 port motorised valve supplied should be manually opened by moving the lever on the motor housing to the MANUAL setting When the primar...

Страница 15: ...emove the thermostat capillaries Note the order of the capillaries within the pocket Remove the terminal shroud Unscrew immersion heater backnut and remove immersion heater from the unit A key spanner is supplied with the cylinder unit for easy removal tightening of the immersion heater Over time the immersion heater gasket may become stuck to the mating surface To break the seal insert a round bl...

Страница 16: ...due to aeration of the water is quite normal and will quickly clear Temperature Controls Solar Temperature control of the solar primary coil is by means of solar differential temperature controller This will usually have been set during commissioning to give a storage temperature of approximately 60 C Refer to user instructions supplied with the controller for details of how to adjust this if requ...

Страница 17: ...connections to motorised valve Water discharges from expansion valve INTERMITTENTLY Expansion vessel charge pressure has reduced below 3 5 bar or set to high See maintenance section for re charging of expansion vessel procedure CONTINUALLY Cold water combination valve pressure reducer not working correctly Expansion valve seat damaged Check pressure from cold water combination valve If greater tha...

Страница 18: ...bination valve complete 70 344 68 7 Direct combined thermostat and thermal cut out 95 612 717 8 Indirect combined thermo stat and thermal cut out 95 612 716 9 Thermal cut out 95 612 698 10 Terminal cover 77 008 62 11 6 way terminal block 95 607 933 12 Accessory kit Indirect without expansion vessel 95 607 968 13 Solar pocket assembly 95 607 064 14 Expansion vessel 24 litre 95 607 612 15 3 way term...

Страница 19: ...ling of waste electrical equipment The separate collection and recycling of your waste equipment at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment For more information about where you can drop off your waste equipment for recycling please contact your local city office your household waste dispo...

Страница 20: ...t set temperature C I min Yes Type of control system if applicable Y Plan S Plan Other Is the cylinder solar or other renewable compatible Yes No What is the hot water temperature at the nearest outlet C All appropriate pipes have been insulated up to 1 metre or the point where they become concealed Yes UNVENTED SYSTEMS ONLY What is the pressure reducing valve setting bar Yes No The tundish and di...

Страница 21: ...e Telephone No Comments Signature SERVICE 07 Date Engineer name Company name Telephone No Comments Signature SERVICE 09 Date Engineer name Company name Telephone No Comments Signature SERVICE 02 Date Engineer name Company name Telephone No Comments Signature SERVICE 04 Date Engineer name Company name Telephone No Comments Signature SERVICE 06 Date Engineer name Company name Telephone No Comments S...

Страница 22: ...22 NOTES ...

Страница 23: ...23 NOTES ...

Страница 24: ... of supply may be required The guarantee is transferable This guarantee does not affect your statutory rights Servicing Baxi Customer Support Baxi Customer Support is Elson s service division With us on your side you can be sure that your customers are in the very best of hands Totally committed to quality and safety Baxi Customer Support is open 7 days a week 363 days a year excluding Christmas D...

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