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Figure 1 - Cross-section of the heater

1) 

Draught diverter

2) 

Hot water outlet

3) 

Insulation 

4) 

Flue tube

5) 

Glass lined tank

6) 

Gas control valve 

7) 

Control panel

8) 

Inspection cover plate

9)  Intermittent pilot burner and flame probe

10)  Cold-water inlet (c/w inlet tube)
11)  Combustion products discharge safety device.
12)  T&P valve connection
13)  Outer casing

14)  Flue baffle

15)  Magnesium anode
16)  Drain valve and secondary return connection
17)  Main burner.

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AOS 1120

Summary of Contents for DR-SA 16

Page 1: ...OCUMENT IS FOUND RELATING TO SPECIFIC GAS TO BE FIRED BEFORE FIRING HEATER THIS WATER HEATER COMPLIES WITH ALL RELEVANT EUROPEAN DIRECTIVES PUBLICATION NO 500001135 ISSUE F APRIL 2012 Dorchester DR SA...

Page 2: ...2...

Page 3: ...ulation system 10 2 1 3 Gas connection 12 2 1 4 Draught diverter 12 2 1 5 Flue system 12 2 1 6 Electrical connection 12 2 2 Commissioning 12 2 3 Removing and replacing the control panel front cover 13...

Page 4: ...All Dorchester heaters are factory assembled and delivered individually packed and shrouded in polythene on a wooden pallet Within the packaging wrapped separately is the draught diverter complete wit...

Page 5: ...rol panel 8 Inspection cover plate 9 Intermittent pilot burner and flame probe 10 Cold water inlet c w inlet tube 11 Combustion products discharge safety device 12 T P valve connection 13 Outer casing...

Page 6: ...safety thermostat is pre set to 90 C The control panel is also fitted with an ON OFF switch I 0 At setting I the gas control is activated on the basis of heat demand from the control thermostat At set...

Page 7: ...ons It is recommended that a competent person carry out the necessary remedial action Important The combustion products discharge safety device must never be put out of operation Re entry of flue gase...

Page 8: ...fice G30 mm 0 23 0 23 Heating time T 45 K min 43 55 DATA G31 37 mbar Nominal output kW 17 6 19 1 Nominal load gross kW 22 5 24 5 Supply pressure G31 mbar 37 37 Gas consumption G31 kg h 1 6 1 8 Diamete...

Page 9: ...ordance with the above regulations install all gas appliances Failure to install appliances correctly could lead to prosecution It is in your own interest and that of safety to make sure that this law...

Page 10: ...hardness 10 0 fH English hardness 7 0 eH 100 mg l CaCO3 Conductivity 125 S cm Acidity pH value 7 0 pH value 9 5 Note If the water specifications deviate from those stated in the table then the tank p...

Page 11: ...A Gas supply B Hot water delivery C Cold water inlet D Hot water taps E Return circulation Figure 6 Connection diagram un vented systems Un vented system see figure 6 To install a Dorchester water hea...

Page 12: ...arapets etc If an existing chimney or flue is to be used this must be swept clean and be free of debris before an approved liner is installed and connected to the water heater Electrical supply Freque...

Page 13: ...n set to the correct value at the factory but it must be checked again at commissioning and during the once a year and every year maintenance by adopting the following procedure 1 Shut down the heater...

Page 14: ...ode Note On no account remove the magnesium anode without checking to make sure that the heater is fully isolated and the pressure removed 1 Close the stop valve in the cold water supply pipe 2 Open t...

Page 15: ...discharge safety device reset button firmly to make sure it is reset 6 Make sure the manual gas shut off valve is open 7 Switch the mains electricity supply to the heater ON Set the on off switch on t...

Page 16: ...ducts discharge Investigate the cause blocked flue incorrect safety device has operated flue wind conditions incorrect ventilation and rectify before pressing reset button on the flue thermostat Insuf...

Page 17: ...urner D Spark electrode E Flame probe G Combustion products discharge safety device H Control thermostat K Safety thermostat M Reset button N Terminal block P Terminal block R Earth terminals S Connec...

Page 18: ...0308 236 R3...

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