Dimplex Unvented Water Heater installation manual Wiring, Fitting Immersion Heaters, E N L

Dimp-15278-SCx_Instructions 31/3/06 9:32 am Page 7

SECONDARY CIRCULATION

CONNECTION DIAGRAM

Fig.3

2 PORT VALVE + 3 PORT MID POSITION
VALVE (Y-PLAN) SYSTEM	Fig.5
GUIDANCE LAYOUT ONLY

E	N	L	2 * 2 PORT (S-PLAN) VALVE SYSTEM
			GUIDANCE LAYOUT ONLY

Fig.4

ROOM

GY

1

3

2

L

N

E

HTG

DHW

PROGRAMMER

THERMOSTAT

ON

ON

1

2

3

2 PORT MID

Br

BI

G

O

GY

4

POSITION VALVE

5

1

2

1

2 GY

TWIN

C

C

THERMOSTAT

6

7

8

BOILER

L

N

E

9

10

MOTOR ON/OFF

Br

BI

G

O

GY

VALVE

PUMP

L

N

E

WIRING

All electrical wiring should be carried out by a registered electrical contractor and must conform to the latest IEE wiring regulations

Do not switch the power on until the unit has been filled with water and all wiring has been earthed, see Fig. 4 and 5.

FITTING IMMERSION HEATERS

These are supplied as standard

An ’O’ ring is supplied as the seal and must be fitted against the flange of the element. Take care not to cross thread and DO NOT USE any other type of seal.

E

N L

As our heating element is Incoloy 825 and is fitted with a cut- out and thermostat for safety, a non-standard 13/4" boss is fitted to the unit. Replacements can only be obtained from your authorised Dimplex Service Agent.

All our heating elements have a built in manual reset cut-out. This will operate if the immersion heater thermostat fails.

WARNING: Ensure that the immersion heater thermostat is set at 60 degrees Celsius.

FITTING THE THERMAL CUT-OUT &

PRIMARY CONNECTIONS

The motorised valve supplied and the thermal cut-out (Hi limit stat) must be fitted to the primary flow. Use compression fittings only.

Operation of the cut-out and motorised valve

To comply with BBA regulations and to prevent the temperature reaching 100 degrees Celsius the thermal cut-out supplied must be fitted.

The thermal cut-out is wired in series to the cylinder thermostat. When the thermal cut-out senses an abnormal rise in temperature in the primary flow the electrical supply to the motorised valve will be cut, and the valve will be in the closed position thus cutting of the primary water from the boiler to the indirect coil in the cylinder. If this occurs it must be reset manually. If the thermal cut-out operates check the cylinder stat and / or boiler stat.

6 7