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INSTALLATION OPERATION AND MAINTENANCE MANUAL
MAXXflo
High Efficiency Condensing Stainless Steel Storage Water heaters
CWH30/200, CWH30/300, CWH60/200, CWH60/300,
CWH90/200, CWH90/300, CWH120/200, CWH120/300
Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference
Part number E281
M6500 Rev B
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Related Manuals for andrews MAXXflo
Summary of Contents for andrews MAXXflo
- Page 1 INSTALLATION OPERATION AND MAINTENANCE MANUAL Part number E281 MAXXflo High Efficiency Condensing Stainless Steel Storage Water heaters CWH30/200, CWH30/300, CWH60/200, CWH60/300, CWH90/200, CWH90/300, CWH120/200, CWH120/300 Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference...
- Page 2 The attention of UK users is drawn to their responsibilities under the Health and Safety Regulations. All installation and service on Andrews Water Heaters must be carried out by competent qualified personnel and, therefore, no liability can be accepted for any damage or malfunction caused as a result of intervention by unauthorised personnel.
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Page 3: Table Of Contents
Decommissioning SECTION 6 FAULT CODES Fault codes Blocking faults Lockout faults SECTION 7 MAINTENANCE Annual maintenance checks SECTION 8 PARTS LIST External, Internal & cylinder spares Flue and old issue spares SECTION 9 DISMANTLING DISPOSAL AND RECYCLING MAXXflo Water Heater... -
Page 4: General And Safety Information
SAFETY INFORMATION IMPROPER USE This Andrews Water Heaters product has been designed and manufactured to comply with current European stan- dards of safety. However, following an improper use, dangers could arise concerning the safety and life of the user or of other people, or damage could be caused to the appliance or other objects. This appliance is designed to be used in a potable domestic hot water supply and storage system. - Page 5 ** Reduce flue length by 4m for 90° bend, 2m for 45° bend and 4m for condensate trap The MAXXflo range features stainless steel tanks with external heat exchanger(s) and fully automatic electronic control with BEMS interface as standard. The heaters must be installed with a minimum water pressure of 1 bar. The heaters are factory fitted with temperature and pressure relief valve(s).
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Page 6: Technical Details
SECTION 2 • TECHNICAL DETAILS Technical parameters MAXXflo Water Heater... -
Page 7: Product Fiche
TECHNICAL DETAILS • SECTION 2 Product Fiche MAXXflo Water Heater... -
Page 8: Heater Dimensions - 300 Litre Model
SECTION 2 • TECHNICAL DETAILS INSPECTION HATCH INSPECTION HATCH MAXXflo Water Heater... - Page 9 TECHNICAL DETAILS • SECTION 2 INSPECTION HATCH INSPECTION HATCH MAXXflo Water Heater...
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Page 10: Installation
INSTALLATION DESCRIPTION LOCATION The MAXXflo series is a direct fired condensing storage The location selected for installation of the heater must water heater which has a stainless steel tank that is heated allow the provision of a satisfactory flue, adequate air by up to four burner modules placed outside the tank. -
Page 11: Water Quality And Treatment
(British Standard particular installation. BS6644). The MAXXflo has a number of copper and brass components. In hard water areas in particular, scale formation can occur... -
Page 12: Condense Drain
(see table below). Model Type CWH30 CWH60 CWH90 CWH120 Maximum flow rate m Minimum load Circulation Pump Fig 2 Secondary Return Line Cold Water MAXXflo Water Heater... -
Page 13: Typical Installations - Cwh30/60 & Cwh90/120
13 13 INSTALLATION • SECTION 3 Fig 3A – Typical installation Fig 3B – Typical installation MAXXflo Water Heater... -
Page 14: Gas Supply - Natural Gas
Andrews Water Heaters are unregulated and a second stage regulator must be installed to give an inlet pressure to the Fit the service gas cock (supplied) to the gas connection on... -
Page 15: Typical Bulk Storage Vessel Installation
INSTALLATION • SECTION 3 Fig 4: Typical Bulk Storage Vessel Installation Fig 5: Typical Cylinder Installation Important These drawings show a schematic representation only and should not be used for installation purposes. Contact your gas supplier for authorised installation drawings. MAXXflo Water Heater... -
Page 16: Electrical Supply
Local Regulations that may apply. The following connections can be made on the terminal The MAXXflo range is designed to operate from a block (see Fig. 5 – Wiring diagram, on next page) permanent 230v/50Hz single phases supply. The fuse rating is 5 amps. -
Page 17: Wiring Diagram
Make sure that the phase (L) and the neutral (N) are connected to the correct terminals on the connector. The appliance is phase sensitive therefore swapping the phase and neutral will lead to a fault in the appliance. MAXXflo Water Heater... -
Page 18: Temporary Water Heater Temperature Change
This happens on the basis of a temperature measurement, up again. Matching MAXXflo storage tanks are available in for example at the end of a circulation line (secondary 200 and 300 litre sizes, models HWST200 and HWST300. -
Page 19: Hwst Tank Dimensions And Wiring Diagram
Thermostat Drain access 28 mm valve PLAN VIEW " Hot water Tank inspection hatch supply 1" Return 28 mm T&P outlets " Feed from water heater 1 or 2 T undishes supplied Fig 10 – Wiring Diagram MAXXflo Water Heater... -
Page 20: Flue Systems
The following pages show standard kits and additional 1m above the highest part of the roof structure and 2.5m items for concentric flue supplied by Andrews. Horizontal from any adjacent structure. The terminal must be fitted and vertical flue kits must be ordered separately. Flue kits with a guard if less than 2m above ground level or in a are not included in the heater price. - Page 21 Wall clamp (125mm) E105 Guard for horizontal flue terminal Hori zont al Ki t E310 Flue condense trap B260 Horizontal flue terminal B261 Vertical flue terminal E211 Condensate trap bottle E075 Flue clamp 125mm E261 Condense trap pipe kit MAXXflo Water Heater...
- Page 22 Flat roof Flashing E065 Can be cut CWH30 max to suit roof 50M Conventional Angled roof structure flashing CWH60 max E066 20M Conventional CWH30 max 14M Concentric CWH60 max 12M Concentric Can be cut to suit roof structure MAXXflo Water Heater...
- Page 23 PART No E308 Ø80 VERTICAL FLUE TERMI NAL C/W CLAMP (CONDENSING) PART No E067 90º ELBOW C/W CLAMP PART No E071 200 Min Maintain dimension if ADJUSTABLE PLATE flue is cut HORIZONTAL TERMINAL C/W WALL PLATES PART No E073 MAXXflo Water Heater...
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Page 24: Flue Systems - Cwh 90 & 120
Wall clamp (200mm) E630 Guard for horizontal flue Hori zontal Ki t terminal E220 Flue condense trap B263 Vertical flue terminal B262 Horizontal flue terminall E211 Condensate trap bottle E385 Flue clamp 200mm E261 Condense trap pipe kit MAXXflo Water Heater... -
Page 25: Alternative Flue Systems - Cwh 90 & 120
Flat roof Flas ing E217 CWH90 max 50M Conventional CWH120 max 40M Conventional Angled r Can be cut flashing CWH90 max to suit roof E218 structure 14M Concentric CWH120 max 14M Concentric Can be cut to s roof structure MAXXflo Water Heater... -
Page 26: Standard Flue System Dimensions - Cwh 90 & 120
26 26 SECTION 3 • INSTALLATION CWH90 & CWH120 STANDARD FLUE SYSTEM DIMENSIONS MAXXflo Water Heater... -
Page 27: Flue Systems - Cwh 30
Not recommended+ Above a pitched roof From a vertical structure on a roof 2,500 2,500 2,500 Above a flat roof From any other roof flue terminal + Not recommended - Risk assessment required ++ Plume management recommended MAXXflo Water Heater... -
Page 28: Flue System - Horizontal And Vertical Terminations
28 28 SECTION 3 • INSTALLATION FLUE SYSTEMS Fig 12 MAXXflo Water Heater... -
Page 29: Air Supply And Ventilation Concentric Flue Systems
Net input In a Room or Internal Space No Requirement for Ventilation Note: Both air vents must communicate with the same room or internal space or both must be on the same wall to outside air. MAXXflo Water Heater... -
Page 30: Alternative Flue Systems - Cwh 30
For installations exceeding 60kW, the following permanent ventilation is required: Low Level (inlet) 540cm plus 5cm per kilowatt in excess of 54kW total net input High Level (outlet) 270cm plus 2.5cm per kilowatt in excess of 54kW total net input MAXXflo Water Heater... -
Page 31: Air Supply And Ventilation Conventional Flue Systems
The requirements for air supply by mechanical ventilation are given in BS6644 and IGE/UP/10 Pt 1. MAXXflo Water Heater... -
Page 32: Heat Exchanger Configuration
The following codes can appear: No heat demand Flashing, water not enabled Heat demand Programme changed, water temperature activated Permanent, circulation pump connected to terminals pump L – pump N activated Flashing, circulation pump stand by Actual water heater temperature MAXXflo Water Heater... -
Page 33: Water Temperature Settings
C 00 appears in the display. Pressing the reset button again switches the display back to the normal menu. If the new temperature is not set within 1 minute, the display switches back to the normal menu without recording the new value. MAXXflo Water Heater... -
Page 34: Instructions For Commissioning
8.3% the corresponding burner module begins to flash. When Propane 9.8% 9.2% all burner modules have been detected, they are started up one by one. When the burner module is operational, the green LED is lit permanently. MAXXflo Water Heater... -
Page 35: Control And Adjustment At Full Load
“Full Load” Setscrew (A) on the gas regulation unit (see Fig 15). The CO 2 percentage can be increased by turning the setscrew to the left. 5. Now check the CO 2 percentage at low load. MAXXflo Water Heater... -
Page 36: Fault Codes
Too many flame failures: When the flame fails Control Error: Poor communication between the three times within on burn cycle two processors Return sensor open circuit Flow sensor open circuit Return sensor short circuit Flow sensor short circuit Reset Error: Too many user resets MAXXflo Water Heater... -
Page 37: Maintenance
6. Test the operation of the TRV and expansion valves by opening and letting an adequate amount of water flow and then shutting them, until water flow stops. Whilst doing this, make sure the discharge pipe does not back up. MAXXflo Water Heater... -
Page 38: External, Internal & Cylinder Spares
38 38 SECTION 8 • PARTS LIST SPARE LIST FOR CWH RANGE MAXXflo EXTERNAL & CYLINDER SPARES ITEMS MAXXflo Water Heater... - Page 39 39 39 PARTS LIST • SECTION 8 MAXXflo INTERNAL SPARES ITEMS MAXXflo Water Heater...
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Page 40: Flue And Old Issue Spares
40 40 SECTION 8 • PARTS LIST MAXXflo FLUE SPARES ITEMS MAXXflo Water Heater... - Page 41 41 41 PARTS LIST • SECTION 8 MAXXflo OLD ISSUE SPARES ITEMS MAXXflo Water Heater...
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Page 42: Parts List
42 42 SECTION 8 - PARTS LIST MAXXFLO SPARES LIST ITEM DESCRIPTION Part No. Sensor Dip Tube 200 Litre c/w Hatch 5140790 Sensor Dip Tube 300 Litre c/w Hatch 5140791 Air Vent ½” SMC 15 5141513 Storage Vessel – 200 Litre E651 Storage Vessel –... -
Page 43: Dismantling Disposal And Recycling
Dispose of the appliance correctly according to the laws in force. The appliance and accessories cannot be discarded along with normal household waste and should be recycled where appropriate. More than 90% of the materials that make up the appliance are recyclable. MAXXflo Water Heater... - Page 44 MAXXflo Condensing Water Heater | PRODUCT SPECIFICATION All the technical information you need is easy to find on our website, using your smart phone, tablet or PC: -BIM files -CAD files -Brochures -Technical specification sheets -Case studies -Installation manuals -User guides...