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Revision No. 2
Revision No. 1
Dated June 2006
Dated: May 2003
Issued By IJR Technical Dept
Issued By IJR
Technical Dept
Approved
KS
Apprioved By KS
By Appointment to
Her Majesty the Queen
Boiler Manufacturers & Engineers
Hoval Ltd Newark
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Summary of Contents for Hoval CT-plus Series
- Page 1 By Appointment to Her Majesty the Queen Boiler Manufacturers & Engineers Hoval Ltd Newark Revision No. 2 Issued By IJR Technical Dept Revision No. 1 Issued By IJR Technical Dept Approved Dated June 2006 Apprioved By KS ...
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Page 2: Table Of Contents
These instructuctions should be read and understood before attempting to install, commission or operate this unit. Hoval Ltd, Northgate, Newark, Notts NG24 1JN Tel: 01636 672711 Fax: 01636 673532 e-mail: service@hoval.co.uk web site: www.hoval.co.uk ... -
Page 3: Introduction
Commissioning should be arranged via the heating engineer. Hoval engineers are available to carry out this work if requested. Where the calorifier installation is part of a Hoval boiler package it will normally be commissioned at the same time and entry made on the report... -
Page 4: Description Of Ct-Plus Calorifier
Low level connection for complete draining and flushing out. (CIBSE TM 13:2000 CT-plus calorifiers are designed to operate with Recommendations to prevent Legionella the full range of Hoval boilers up to 3.10 Bar pri- Bacteria Contamination). mary pressure, and are intended for the produc- •... -
Page 5: Technical And Performance Details Ct-Plus Calorifier
Technical and Performance Details CT plus 180 CT plus 280 - 520 T & P valve connection for unvented calorifiers T & P valve connection (optional) for unvented calorifiers (optional) Pipe sizes can be expanded to suit site requirements if necessary on leaving the calorifier. - Page 6 Technical and Performance Details Outputs Based on 10 C Cold Feed, 82 C Primary Flow and 60 C Secondary Flow. DHW Output Model at different primary flow rates Primary flow rate 10 mins draw off Continuous hourly litres/second draw off litres litres 0.75 CT plus 180...
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Page 7: Installation And Piping Layouts
Installation and Piping Layouts Installation and Piping Layouts Installation and Piping Layouts. Installation Installation Position the calorifiers as required, ensuring Position the calorifiers as required, ensuring that that side and inspection opening clearances side and inspection opening clearances are ad- To facilitate venting during drain To facilitate venting during drain are adequate. -
Page 8: Installation And Piping Layouts
Installation and Piping Layouts Installation and Piping Layouts Recommended Primary Systems Continued. Recommended Primary Systems Continued. Installation and Piping Layouts Recommended Primary Systems Continued. Primary Connections direct from boiler. Primary Connections direct from boiler. Temperature control by pump. Temperature control by diverting valve. 4 (if Required) Primary Water... -
Page 9: Unvented Systems
Unvented Systems Definition • An expansion relief valve should be fitted in the cold An unvented hot water system differs from conventional feed between the expansion vessel and the calorifier. open vented systems in that no vent pipe is provided No means of isolating the calorifier from this valve and it is connected to the mains water supply, eliminating should be installed. - Page 10 Hoval Unvented System Kits Unvented System Kit. Hoval have carefully sized and selected a range of standard unvented system kits suitable for installation with the CT plus range of calorifiers. T & P Relief Valve.
- Page 11 Unvented Systems Multi-calorifier Installations Shared Unvented System Kits Temperature Temperature and Pressure and Pressure Relief Valve Relief Valve Feeding two or more calorifiers. Two or more calorifiers can be installed with individual unvented system kits. Where the expansion vessels have been sized to share the total system expansion the two feed lines can be joined by a pipe to allow both...
- Page 12 Unvented Systems Balanced Hot and Cold water supplies. Unvented System with balanced Temperature and Pressure hot and cold water services. Relief Valve 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-...
- Page 13 Unvented Systems Fitting the Unvented System Kit. Fit the components as indicated. In the suggested Installation of the Expansion Expansion schematics detailed on previous pages. Vessel Vessel. All components must be installed in a frost free area. Ensure that valves and fittings are fitted correctly to suit the direction of flow.
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Page 14: Commissioning & Operation
Commissioning & Operation Commissioning Instructions Pre-commissioning: Warning: To avoid Legionellae, en- Important: Always fill the second- sure the calorifier control stat is set ary side of the calorifier before at a minimum of 60 deg C. the primary. Pressurising the pri- mary when the secondary is empty may cause the secondary bottle to collapse. -
Page 15: Inspection And Maintenance
Inspection and Maintenance Periodic Inspection The user is advised to carry out periodic inspec- (4) Open primary vent valve. tion between main servicing periods and it is rec- (5) Open primary drain. ommended that the specialist servicing company (6) Isolate all secondary connections. also carries them out. -
Page 16: Immersion Heaters
Immersion Heaters Operation General Ensure that the active sections of all the heating All work should be carried out by suitably qualified • • elements are fully immersed in the fluid to be personnel. heated at all times whilst energized. Heaters must be handled with care and stored in •... -
Page 17: Immersion Heater Wiring Diagrams
Immersion heater Electrical Diagrams... -
Page 18: Fault Finding Chart
Fault finding Please carry out checks as per the list below when faults occur. If you cannot rectify the fault, contact Hoval Customer Services or your installer. Telephone number and e-mail address are shown on the rear cover. Symptom Possible Cause Action A. -
Page 19: Wiring Diagrams For Open Vented Calorifiers
Electrical Diagrams... -
Page 20: Wiring Diagrams For Unvented Calorifiers
Electrical Diagrams ... -
Page 21: Notes
Notes... - Page 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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