background image

 

Page 

2

 of 

34 

 

 

1  USER INSTRUCTIONS 

 

1.1  User Warnings 

Do not remove or adjust any part of this unvented water heater.  

If the unvented water heater develops fault, such as a flow of water from the discharge pipe switch 
the heater off.  

In all cases contact a competent installer.  

Documented records of annual services must be retained by the user. 

If cold/warm water is discharged from the cylinder via the tundish, call your installer. 

  If extremely hot water is discharged, 

immediately

 switch off ALL heat sources (which may 

include  boilers,  heat  pumps,  solar  thermal  systems  and  immersion  heaters),  isolate  their 
electrical supplies and call your installer. 

 

This  appliance  is  not  intended  for  use  by  persons  (including  children)  with  reduced  physical, 
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given 
supervision or instruction concerning use of the appliance by a person responsible for their safety.  
Children should be supervised to ensure that they do not play with the appliance. 

The recommended storage temperature for both direct and indirect cylinders is 60-65°C. In hard 
water  areas  consideration  should  be  given  to  reducing  this  to  50-55°C.  In  some  applications 
guidance  on  Legionella  control  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  details  consult  local  regulations  applicable  to  the 
installation. 

When  a  hot  tap  is  turned  on  there  may  be  a  short  surge  of  water 

–  this  is  quite  normal  with 

unvented systems and does not mean there is a fault.  When you first fill a basin, the water may 
sometimes appear milky. This is due to air bubbles in the water which will clear very quickly. 

1.2  Cylinder Thermostat 

All  cylinders  (except  Direct  models)  are  fitted  with  one  or  more 
cylinder thermostats to control the heat input to the cylinder from a 
remote heat source, such as a boiler, heat pump or solar thermal 
installation.  The  temperature  of  each  cylinder  thermostat  is 
adjustable  between 

nominally

  40°C  and  70°C.    Turn  the  control 

knob  clockwise  to  increase  temperature,  and  anticlockwise  to 
decrease. 

Each  cylinder  thermostat  has  a  built-in  manually  reset  safety 
thermostat  which  will  ‘lock  out’  in  the  event  of  the  cylinder 
overheating  and  which  will  need  to  be  reset  in  order  to  restore 
operation.   

In the event of a lockout situation occurring, it is vital to contact the 
installer of the appliance to determine and rectify the cause of lock 
out. 

All electrical supplies to the appliance must be isolated before attempting to reset the thermostat. 

 

 

Control dial 

Reset button 

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...

Reviews: