Table of Contents
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Pack Contents
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Coral Aquanox vented water heater incorporating immersion heater(s) & thermal controls
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Visual discharge indicator
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Compression nuts & olives
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Immersion heater spanner
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Installation & servicing instructions
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Guarantee card
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Blending valve insulation kit
Please read & understand all these instructions before commencing installation.
Please leave this manual with the user for future reference.
Coral Aquanox Installation Manual
Thermal Store Direct & Indirect Water Heaters
Installation & Servicing Instructions
IMPORTANT
1
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Table of Contents
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Summary of Contents for Elson Coral Aquanox
- Page 1 Coral Aquanox Installation Manual Thermal Store Direct & Indirect Water Heaters Installation & Servicing Instructions Pack Contents • Coral Aquanox vented water heater incorporating immersion heater(s) & thermal controls • Visual discharge indicator • Compression nuts & olives • Immersion heater spanner •...
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Page 2: Table Of Contents
TECHNICAL SPECIFICATION........3 the latest relevant safety specifications. INSTALLATION GENERAL..........6 The Elson Coral Aquanox thermal store is an Open Vented Hot Water only Thermal Store (HWTS). MANUAL FILL VERSION..........13 The stored energy in a Hot Water only Thermal Store is only used indirectly via a natural convection hot COMMISSIONING............14... -
Page 3: Technical Specification
LIMITATIONS TECHNICAL SPECIFICATION The Thermal Store water heater should not be used in association with any of the following: OPERATIONAL SUMMARY • Solid fuel boilers or any other boiler in which the Total storage volume (V 120ltrs energy input is not under effective thermostatic 150ltrs control, unless additional and appropriate safety 175ltrs... - Page 4 Fig. 1 Key Features Primary Coil Flow Connection - 3/4”/22mm compression Primary Coil Return Connection - 3/4”/22mm compression Electrical Connection Housing - IPX2 Visual Discharge Indicator - 22 x 28mm compression Feed & Expansion Header Tank Feed & Expansion Header Tank Lid Blending Valve Insulation Cover Hot Outlet (TMV2) - 22mm compression Cold Supply Inlet - 22mm compression...
- Page 5 Ø 580 Ø 580 27° 47° Fig. 2 Dimensions and performance (Auto-fill versions shown) Type Model Dimensions (mm) Total Coil Rating (kW) Hot Water Hot Water Reference Storage Capacity (ltrs) Capacity (ltrs) (volume of water (v40°C) Volume Primary drawn off >40°C) Water Coil Store Store Store Store Coil Temp Temp...
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Page 6: Installation General
INSTALLATION GENERAL COLD FEED A 22mm cold water supply is recommended, however, if a 15mm (1/2”) supply exists, which provides sufficient WATER SUPPLY flow, this may be used (although more flow noise may Bear in mind that the mains water supply to the be experienced). property will be supplying both the hot and cold water requirements simultaneously. A stopcock or servicing valve should be incorporated into the cold water supply to enable the Thermal It is recommended that the maximum water... - Page 7 distance of 300mm must be left (see Fig. 3). SITING THE UNIT • For the autofill versions a minimum distance of The Thermal Store must be vertically floor mounted. 225mm must be left free above the unit in order to Although location is not critical, the following points comply with the access requirements of the water should be considered: regulations.
- Page 8 Schematics Indirect model 2 metres is required for expansion in pipework before nearest cold draw-o Where expansion down the mains is not possible install an expansion vessel with a capacity not less than 1000ml Direct model 2 metres is required for expansion in pipework before nearest cold draw-o...
- Page 9 Fig. 5: Blending Valve Insulation...
- Page 10 INSTALLATION - DIRECT SAFETY DISCONNECT FROM THE MAINS ELECTRICAL SUPPLY BEFORE REMOVING ANY COVERS. Never attempt to replace the immersion heater(s) other than with the recommended immersion heater(s). DO NOT BYPASS THE THERMAL CUT-OUT(S) IN ANY CIRCUMSTANCES. Ensure the two male spade terminations from the combined thermostat and thermal cut-out are pushed firmly onto the terminations on the element plate assembly.
- Page 11 PRIMARY CIRCUIT CONTROL INSTALLATION - INDIRECT A motorised valve MUST be fitted on the primary flow to the cylinder heat exchanger and wired in series with the indirect control thermostat and thermal cut-out SAFETY fitted to the unit. DISCONNECT FROM THE MAINS ELECTRICAL Primary circulation to the Thermal Store heat SUPPLY BEFORE REMOVING ANY COVERS. exchanger must be pumped; gravity circulation WILL Never attempt to replace the immersion heater(s) other NOT WORK.
- Page 12 Fig. 8: Schematic wiring diagram - Basic 2 x 2 port valve system Fig. 9: Schematic wiring diagram - 3 port mid position valve system. N.B. Must be used in conjunction with 2 port zone valve supplied...
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Page 13: Manual Fill Version
MANUAL FILL VERSION MANUAL FILL The store is provided with a flexible temporary filling loop which MUST be disconnected after installation to comply with the requirements of the Water Supply (Water Fittings) Regulations 1999. The feed & expansion header tank water level should be checked regularly. If required fill with clean cold water via the filling loop to the appropriate level as shown on the sight glass. Do not overfill the tank. Ensure that the header tank lid is securely replaced, this reduces the amount of water lost through evaporation during operation. -
Page 14: Commissioning
• Check operation of the blending valve and test that COMMISSIONING the water temperature (hot flow mix) is at 55°C when the store temperature is operating at 75°C. • Check operation of the immersion heater FILLING THE UNIT WITH WATER thermostats and settings. -
Page 15: User Instructions
DO NOT bypass the thermal cut-out(s) in any USER INSTRUCTIONS circumstances. OPERATIONAL FAULTS WARNINGS Operational faults and their possible causes are IF STEAM DISCHARGES FROM THE OVERFLOW detailed in the Fault Finding section of this book. It VISUAL INDICATOR SHUT DOWN THE BOILER is recommended that faults should be checked by a OR IMMERSION HEATER(S). -
Page 16: Maintenance
break the seal insert a flat bladed screwdriver into one MAINTENANCE of the pockets on the immersion heater and gently lever up and down. MAINTENANCE REQUIREMENTS Carefully remove any scale from the surface of the Thermal store hot water systems have a continuing element(s). DO NOT use a sharp implement as maintenance requirement in order to ensure safe damage to the element surface could be caused. - Page 17 Step 3: Remove feed & expansion tank Step 1: Drain feed & expansion tank Step 2: Release feed & expansion xing bolt & slide forwards to remove (note: drain tank only) tank pipe connections Fig. 13: Header Tank Removal Step 1: Drain feed & expansion tank Step 2: Release connection pipe, remove rear tank by unhooking and lifting (note: drain tank only)
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Page 18: Performance
PERFORMANCE DHW Performance of a thermal store Coral Aquanox 120ltr 75°C 85°C Draw-off volume (l) Fig. 14: 120ltr Hot Water Performance DHW Performance of a thermal store Coral Aquanox 150ltr 75°C 85°C Draw-off volume (l) Fig. 15: 150ltr Hot Water Performance... - Page 19 DHW Performance of a thermal store Coral Aquanox 175ltr 75°C 85°C Draw-off volume (l) Fig. 16: 175ltr Hot Water Performance DHW Performance of a thermal store Coral Aquanox 210ltr 75°C 85°C Draw-off volume (l) Fig. 17: 210ltr Hot Water Performance...
- Page 20 Pressure Loss Characteristics of DHW heat exchanger Coral Aquanox 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 0.00 9.45 12.6 (FDHW) 13.86 15.75 DHW flow rate (l/min) Fig. 18: Pressure Loss Characteristics: DHW Exchanger Pressure Loss Characteristics of a Primary heat exchanger Coral Aquanox 0.40...
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Page 21: Fault Finding & Servicing
FAULT FINDING water heating systems. The fault finding chart (Table 3) will enable operational • Any spare parts used MUST be authorised Elson faults to be identified and their possible causes parts. rectified. Any work carried out on the thermal store •... -
Page 22: Spares
SPARES The following comprehensive list of spare parts is available for your Elson Thermal Store water heater. Please refer to the rating label on the Elson Thermal Store water heater before ordering to ensure the correct spare is obtained Item... - Page 23 Figure 20: Exploded Spares Diagram...
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Page 24: Heat Loss
The Coral Aquanox is supplied with an innovative casing which insulates the blending valve. The carefully injection moulded one-piece insulation can be fitted after installation for ease of plumbing. - Page 25 NOTES...
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Page 28: Guarantee
Evidence of purchase and date of supply may be required. The Policy Statement guarantee is transferable. This guarantee does not affect your The policy of ELSON is one of statutory rights. continuous product development and, as such, we reserve the right to change specifications without notice.
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Questions and answers
How do you reset the thermal cut offs and what is the most appropriate settings from both? I hear that a setting of 4 is recommended, but is that for both? Thank you
The document does not provide information on how to reset the thermal cut-offs on the Elson Aquanox. However, it clearly states: "DO NOT bypass the thermal cut-out(s) in any circumstances."
Regarding recommended temperature settings: the thermostat adjustment range is from 37°C to 85°C, with 75°C being approximately position 4 on the dial. This is also stated as the normal working temperature.
This answer is automatically generated