Dimplex Unvented Water Heater Guidance in the Event of a Problem, Problem Solving, Spares

Dimp-15278-SCx_Instructions 31/3/06 9:32 am Page 11

TABLE 1 – SIZING OF COPPER DISCHARGE PIPE (D2) FOR COMMON T&P RELIEF VALVE SIZES

Valve outlet Size	Minimum size of	Minimum size of	Maximum resistance	Resistance created by
	discharge pipe D1	discharge pipe D2	allowed, expressed as a	each elbow or bend
		from tundish	length of straight pipe
			(i.e. no elbows or bends)
G1/2	15mm	22mm	up to 9m	0.8m
		28mm	up to 18m	1.0m
		35mm	up to 27m	1.4m
G3/4	22mm	28mm	up to 9m	1.0m
		35mm	up to 18m	1.4m
		42mm	up to 27m	1.7m
G1	28mm	35mm	up to 9m	1.4m
		42mm	up to 18m	1.7m
		54mm	up to 27m	2.3m

MAINTENANCE

●To keep the cylinder in good operating order the cylinder should be serviced once a year by a Dimplex service engineer.

●If water is seen dripping through the tundish, please contact your installer or Dimplex service agent.

●To receive the 25 year guarantee please complete and return the guarantee card within 30 days of purchase / install

– please read Terms and Conditions on the guarantee card.

GUIDANCE IN THE EVENT OF A PROBLEM

●If you have a problem, in the first instance contact the plumber who fitted the unit. There after contact the plumber who carries out the annual servicing for you.

PROBLEM SOLVING

No water in tap from the SCx Unit

Check that mains supply is on.

Check that the line strainer is not blocked

Check that the combination valve has been fitted so that the arrow on it faces in the direction of the water flow.

If the water at the hot tap is cold

Boiler (indirect): Ensure that the boiler has been switched on and working correctly.

Check current amps drawn by the heater, should be approx. 15 amps. If heating element fails to operate, change the complete heating element assembly.

Important. In the event of an over heat situation reset all thermal cutouts.

If hot water discharges from Tundish

WARNING: Do not turn the mains water supply off - switch off

(1)power to immersion heaters (Direct) or (2) shut down heating boiler (Indirect)

Check that no air blocks have occurred in the primary system

Check the following are all connected correctly

Cylinder Stat

Thermal cut out (Reset by pushing red button)

Motorised valve

Boiler thermostat (max setting 82 degrees Celsius)

Boiler thermal cut out (if fitted)(Reset by pushing red button)

Direct (Electric) Models

If hot water discharges from the tundish on indirect models there

could be a fault with the thermal cut out, cylinder thermostat or

temperature pressure relief valve. On a direct model the fault

could lie with the heating element thermostat. We recommend

you call your installer or Dimplex Service Agent.

SPARES

When ordering replacement parts the serial number on the

unit should be quoted.

WARNING: Isolate unit at main electric supply before opening heating element cover.

Ensure that power is available to the element from the electric mains and that the isolator is on. If there is power to the element and the element fails to operate check as follows:

Check that the thermal cut out on the elements have not operated. If they have, reset by pressing the red button. If they cut out again as the water heats up the cylinder thermostat has failed and needs replacing. Fit a new thermostat and reset the thermal cut out.

With power on and the thermal cut out reset check the output terminal on the thermostat. If the circuit cannot be completed, the thermostat and/or cut out needs replacing.

PART/COMPONENT REFERENCES

Tundish 15mm to 22mm -	SC06006
Expansion Vessel Kit (12 Litre) -	SC06001
Expansion Vessel Kit (18 Litre) -	SC06002
Expansion Vessel Kit (25 Litre) -	SC06003
Motorised Valve -	SC06007
Immersion Heater -	SC06009
Temp/pressure Relief Valve -	SC06005
Twin Thermostat -	SC06008
Inlet valve assembly -	SC06004

WARNING: Should the factory fitted temperature and pressure relief valve be tampered with your guarantee will be invalidated. Neither the distributor nor manufacturer shall be responsible for any consequential damage howsoever caused.

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