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Balanced hot and cold water

services using two PRVs.

Cold

Feed

The hot and cold water supplies

can be balanced using two

separate PRVs.

Drain Cock

By the

Installer

Strainer

Pressure

Reducing

Valve

Double

Check

Valve

Expansion

Vessel

Expansion

Relief Valve

and Tundish

Temperature

and Pressure

Relief Valve

Isolating

Valve

Balanced Cold Water Supply

Balanced Hot and Cold water supplies.

Unvented Systems

Unvented System with balanced

hot and cold water services.

Cold

Feed

The hot and cold water supplies

can be balanced by utilizing the

same strainer and PRV to

control the two supply lines.

Note it may be necessary to

increase the size of these two

fittings in comparison to the non-

return valve in the calorifier cold

feed line.

Drain Cock

By the

Installer

Strainer

Pressure

Reducing

Valve

Double

Check

Valve

Expansion

Vessel

Expansion

Relief Valve

and Tundish

Temperature

and Pressure

Relief Valve

Isolating

Valve

Balanced Cold Water Supply

Содержание CT plus 180

Страница 1: ...sued By IJR Technical Dept Approved KS Dated May 2003 By Appointment to Her Majesty the Queen Boiler Manufacturers Engineers Hoval Ltd Newark Revision No 2 Issued By IJR Technical Dept Dated June 2006...

Страница 2: ...derstood before attempting to install commission or operate this unit Introduction Description of CT plus Calorifier Technical and Performance Details CT plus Calorifier Installation and Piping Layout...

Страница 3: ...ce with current I E E regulations relevant British Stan dard and Codes of Practice Building Regula tions and Local Authority Bylaws Commissioning should be arranged via the heating engineer Hoval engi...

Страница 4: ...ss water gen eration the key requirement is for adequate quan tities of hot water over a relatively short period On this basis the CT plus will provide significantly higher flow rates than its continu...

Страница 5: ...280 CT plus 420 CT plus 520 CT plus 180 CT plus 280 520 Water Content Weight Primarylitres Secondary litres Dry kg Wet kg 61 180 177 418 94 280 211 585 114 420 248 782 135 520 302 957 Working Pressure...

Страница 6: ...load on the boiler for the calori er primary supply Note for Hydraulic Testing The primary jacket should not be pressurised without rst lling and sealing the inner stainless steel vessel An adjustabl...

Страница 7: ...rom Main Headers Temperature control by diverting valve 3 7 Primary Water Secondary Water Installation and Piping Layouts Installation Position the calori ers as required ensuring that side and inspec...

Страница 8: ...Secondary Systems Key 1 Relief valve adjacent to calori er 2 Spring loaded non return valve Note On CT plus 180 calori ers the secondary return and cold feed connections are at the top The cold feed s...

Страница 9: ...aken to ensure they can pass the flow rates at the required pressure Hovals standard unvented system kits are sized to reduced incoming pressure to 3 bar at a flow rate that meets the peak output of t...

Страница 10: ...rning On balanced systems with a common PRV Strainer and Double check valve ensure that the valves are sufficiently sized to cope with both hot and cold water demand Hoval Unvented System Kits Hoval h...

Страница 11: ...ts Feeding two or more calorifiers Cold Feed Two or more calorifiers can be installed with individual unvented system kits Where the expansion vessels have been sized to share the total system expansi...

Страница 12: ...water supplies Unvented Systems Unvented System with balanced hot and cold water services Cold Feed The hot and cold water supplies can be balanced by utilizing the same strainer and PRV to control t...

Страница 13: ...n out strainer on commissioning and annually Check Expansion relief valve setting annually by twisting the cap on top of the valve Checkexpansionvesselgaschargepressure isolate thevessel drainoffanywa...

Страница 14: ...o oper ate between 30 deg C and 80 deg C and is usu ally set to 60 deg C Pre commissioning Important Always fill the second ary side of the calorifier before the primary Pressurising the pri mary when...

Страница 15: ...hose to primary drain which should be in stalled in primary outlet and run the hose to a gulley Note The primary side of the calorifier MUST always be drained before the secondary The secondary MUST...

Страница 16: ...overcurrentdevice The cables must enter the heater terminal box via asuitablecableglandtomaintaintheIPratingand be fitted by a qualified person Earth Connection Operation Ensure that the active secti...

Страница 17: ...17 Immersion heater Electrical Diagrams Immersion heater wiring diagrams...

Страница 18: ...ler part document 4 Vent primary system 5 Change pump speed or pump Symptom Possible Cause Action A Secondary water temperature not as setting on thermostat 1 Leakage in system 2 Pump faulty or inoper...

Страница 19: ...19 Electrical Diagrams Wiring Diagrams for Open Vented Calorifiers...

Страница 20: ...20 Electrical Diagrams...

Страница 21: ...21 Notes...

Страница 22: ...Conservation of Energy Protection of the Environment Hoval Limited Northgate Newark Notts NG24 1JN Telephone 01636 672711 Fax 01636 673532...

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