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GUARANTEE 

Warmflow unvented cylinders are supplied with the following guarantees from the date of purchase: 

(a)  A 25 year guarantee on the duplex stainless steel cylinder body against defects of material. 

(b)  A 2 year guarantee on all parts and components as well as any defects that may have occurred from time 

to  time  during  the  normal  manufacturing  process  of  the  cylinder  as  carried  out  by  those  exercising  all 
relevant skill and experience and complying with all relevant legislation, regulations and codes of practice 
relating to the manufacturing process. 

1.  The guarantees provided are from the date of purchase and are conditional upon: 

1.1 

the unit being installed and commissioned by competent persons in accordance with the manufacturer’s 
instructions and relevant legislation, regulations and codes of practice in force at the time; 

1.2  the product being registered with Warmflow within 30 days of installation and the guarantee registration 

completed and returned to Warmflow along with evidence of the date of purchase; 

1.3  the unit not being modified in any way, or misused or subject to neglect; 

1.4 the  unit  being  serviced  annual

ly  by  competent  persons  in  accordance  with  the  manufacturer’s 

instructions and all regulations and codes of practice in force at the time; 

1.5 each service record being completed and proof of purchase and servicing being retained and made 

available to Warmflow in respect of any claim; 

1.6 the unit being used solely for the purpose of heating potable water that complies at all times with EU 

standards and not fed from a private source. 

Failure to comply with any of the conditions outlined in this clause will invalidate the warranty in its entirety. 

2.  The guarantee is not transferable and excludes: 

2.1 labour costs associated with the replacement of the unit or its components; 

2.2 any defects that appear after the customer makes any modification or alteration to the unit; 

2.3 defects  caused  by  the  improper  use  or  storage  of  the  unit  and  in  particular  (but  without  limitation) 

Warmflow shall not be liable in the case of defects arising from normal deterioration or improper or faulty 
handling or processing of the unit by the customer; 

2.4 consequential losses however caused. 

3.  If within the 2 year guaranteed period, as set out at (b) above, a material defect is discovered in the Unit: 

3.1 the customer must send written notification following discovery giving particulars and either at its own 

expense and risk shall return the unit to Warmflow within 2 weeks of written notice being provided by 
Warmflow; or (at Warmflow’s sole option) shall permit Warmflow to inspect same; and 

3.2 if such defect has arisen from faulty materials employed or workmanship carried out by Warmflow and 

is existing but not reasonably discoverable upon inspection at the time of receipt then Warmflow shall 
supply such part(s) free of charge along with the costs of transporting same to the customer. 

3.3 The replacement parts must be fitted in accordance with the terms of the guarantee set out above.  

3.4 The replacement parts shall be covered under this guarantee for the remainder of the unexpired term 

of two years. 

3.5 Invoices for call out and/or repair by any third party or parts supplied by a third party will not be accepted 

unless previously authorised by Warmflow in writing. 

Warmflow’s liability for defective units is limited in all circumstances to delivery of parts for the defective unit 
and the customer shall accept same as f

ulfilment of Warmflow’s obligations. 

5  Warmflow disclaims all other warranties whether express, implied or statutory.  Your statutory rights are not 

affected. 

6  This guarantee applies to Warmflow cylinders installed on the UK mainland (excluding Scottish Isles), Isle 

of  Man,  Channel  Islands,  Northern  Ireland  and  Republic  of  Ireland  only.    Provision  of  in  warranty  cover 
elsewhere is subject to the agreement in writing of Warmflow. 

Summary of Contents for DI110UV

Page 1: ...e Instructions Nero Unvented Cylinders Mains Pressure Stainless Steel Water Heaters Products covered by this manual Direct DI110UV DI140UV DI170UV DI200UV DI240UV DI290UV Indirect IN110UV IN140UV IN17...

Page 2: ...PRODUCT WILL INVALIDATE ALL GUARANTEES TECHNICAL SPARES GUARANTEE CLAIMS For technical advice about the installation commissioning servicing or use of this appliance please contact the Warmflow Custom...

Page 3: ...2 6 4 Tundish 13 6 5 Expansion Vessel 13 6 6 Pipework Configurations Excluding Heat Pump models 14 6 7 Pipework Configurations Heat Pump models 15 6 8 Plate heat exchanger installation 16 6 9 Inlet Gr...

Page 4: ...trol and safe water delivery temperatures can require a storage temperature of 60 65 C distributing to outlets at 50 55 C using thermostatic mixing valves to control the final outlet temperature For d...

Page 5: ...rmostats learn the routine of hot water use and adjust their operation to suit this increasing energy efficiency The immersion heater with SMART thermostat must be fitted to the lowest immersion heate...

Page 6: ...bar at a temperature of 90 C f The mains water supply does not consistently contain a high proportion of suspended matter that could block the strainer g The mains water supply does not contain chlori...

Page 7: ...der requires no corrosion protection device e g anode 5 TECHNICAL DATA 5 1 General Direct Indirect Twin Coil Heat Pump OPERATING DATA Operating pressure bar 3 0 3 0 3 0 3 0 Maximum operating working p...

Page 8: ...140 180 210 240 290 350 Standing heat loss kWh 24h 1 43 1 41 1 68 1 78 2 08 2 15 V40 Hot water volume litres 138 181 230 267 345 432 PERFORMANCE Heat up time by lower immersion only mins 121 154 198 2...

Page 9: ...ATA Rated volume litres 107 135 165 194 233 281 Weight when full kg 140 180 210 240 290 350 Standing heat loss kWh 24h 1 43 1 41 1 68 1 78 2 08 2 15 V40 Hot water volume litres 157 164 209 263 320 366...

Page 10: ...3 281 Weight when full kg 210 240 290 350 Standing heat loss kWh 24h 1 66 1 97 2 12 2 26 V40 Hot water volume litres 245 253 341 434 COIL PERFORMANCE EN12897 Primary coil rating 15L min kW 14 27 14 35...

Page 11: ...4 233 281 Weight when full kg 210 240 290 350 Standing heat loss kWh 24h 1 68 1 78 2 08 2 15 V40 Hot water volume litres 229 259 312 401 COIL PERFORMANCE EN12897 Primary coil rating 15L min kW 17 08 2...

Page 12: ...Hot Cold Water Connections The factory fitted temperature and pressure relief valve must NOT be removed from the cylinder or tampered with in any way The valve is pre calibrated to operate at 7 bar o...

Page 13: ...tribution pipework Pipework supplying the hot water taps must be capable of withstanding a maximum pressure of 7 bar at a temperature of 90 C and should be run in 22mm throughout the property Only sho...

Page 14: ...with the combined control safety thermostat in order to comply with Building Regulations and to ensure a safe installation In this manner if the heat source malfunctions and produces excess heat the m...

Page 15: ...k between the inlet group and the cylinder in order to accommodate expansion of the stored water due to heating For ease of installation a dedicated expansion vessel port is provided on the body of th...

Page 16: ...configuration excluding Heat Pump models HOT OUTLET COLD INLET Balanced Supply to cold taps Discharge M 1 2 3 4 5 Primary Flow Return 6 7 Mains stopcock not supplied Inlet group Temperature pressure r...

Page 17: ...other fittings Ensure the connections are clean and tight Additional details are included with the accessory kit see document Q12 084 HOT OUTLET COLD INLET Balanced Supply to cold taps Discharge 1 2 3...

Page 18: ...lating pump installation The circulating pump must always be installed with horizontal motor shaft At start up the rotor can must be vented by removing the plug in the top of the motor Within a short...

Page 19: ...Page 17 of 34 6 9 Inlet Group connections All models Figure 6 Inlet group connections To drain via tundish To cylinder COLD INLET From mains stop cock To cold taps To expansion vessel...

Page 20: ...er system discharge by way of the same manifold that is used by the safety devices the manifold should be factory fitted as part of the hot water storage system unit or package Tundish 3 54 The tundis...

Page 21: ...et size of the safety device unless its total equivalent hydraulic resistance exceeds that of a straight pipe 9m long i e for discharge pipes between 9m and 18m the equivalent resistance length should...

Page 22: ...arge pipe 10 2m Maximum resistance allowed for a 22mm copper discharge pipe D2 from a G temperature relief valve is 9 0m which is less than 10 2m Therefore installation unacceptable Discharge pipe D2...

Page 23: ...he circumstances in which they are used as set out in BS EN ISO 1043 1 2002 2 Where pipes cannot be connected to the stack it may be possible to route a dedicated pipe alongside or in close proximity...

Page 24: ...e appliance must be effectively earthed and all external wiring should comply with current IEE Regulations Mount the cylinder thermostat by carefully inserting the capillary sensors into the appropria...

Page 25: ...RT thermostats learn the routine of hot water use and adjust their operation to suit this increasing energy efficiency Ensure to use correctly rated cable and isolation methods Refer to current IEEE g...

Page 26: ...s behind the cylinder thermostat s Remove the thermostat cover and base Pass the sensor through the base then insert into the pocket as shown in Figure 9 Anchor the cable using the clamp provided Fig...

Page 27: ...circulating pump may be powered by a digital relay auxiliary pump output from the heat pump When the cylinder thermostat is satisfied the potable water circulating pump and heat pump DHW call will be...

Page 28: ...e Valve Cylinder Thermostat HW Zone Valve 5 Amp Fused Spur Isolator Live L Neutral N Earth E Heating On X Hot Water On Y L N E N N N N N N N L G N E 3 2 B E O N G W E O N N N 2 E E E E L L L X Y 1 3 Z...

Page 29: ...Page 27 of 34 Figure 12 HP Cylinder potable water circulating pump wiring...

Page 30: ...occurring it is vital to determine and rectify the cause of lock out 7 2 Commissioning Isolate all electrical supplies until otherwise instructed during the commissioning process 1 Prior to filling t...

Page 31: ...tly 11 Check that while the cylinder is heating up no water exits from either the expansion relief or the temperature and pressure relief valves and that the system controls deactivate all heat source...

Page 32: ...erate by rotating the knob both the expansion relief and the temperature and pressure relief valves to prove the correct function of the discharge arrangement 6 Check all joints for leaks and rectify...

Page 33: ...n a to Direct models Check wiring and or plumbing connections to pump Plate Heat Exchanger Blocked Descale Replace the Plate Heat Exchanger Water from hot taps extremely hot Controls malfunction Isola...

Page 34: ...hat appear after the customer makes any modification or alteration to the unit 2 3 defects caused by the improper use or storage of the unit and in particular but without limitation Warmflow shall not...

Page 35: ...eight use appropriate PPE and lifting aids Polyisocyanurate foam insulation suitable PPE should be used for respiration protection and to avoid skin or eye contact 10 2 Disassembly of the Product The...

Page 36: ...r Electronic Components 5 Storage Tank Stainless Steel 6 Casing Top Plastic 7 Immersion Heater Plastic Brass Incoloy Electronic Components Consult Component Manufacturer 8 Heating Coil s Stainless Ste...

Page 37: ......

Page 38: ...869 WARMFLOW Customer Care Centre UK 028 9262 1515 ROI 048 9262 1515 Email service warmflow co uk THIS MANUAL IS ACCURATE AT THE DATE OF PRINTING E OE BUT MAY BE SUPERSEDED AND SHOULD BE DISREGARDED I...

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