A.O. Smith 28 30 50 60 service manual Water connections, Unvented Cold water side, Hot water side

is Water connections, Unvented

3.6Water connections, Unvented

3.6.1Cold water side

See ain Figure 3.3.

1.Fit an approved stop valve i on the cold water side as required by regulations.

Refer also to paragraph ’1.3 Regulations’.

2.The maximum working pressure of the appliance is 8 bar. Because the pressure in the water pipe at times can exceed 8 bar, you must fit an approved pressure-reducing valve a.

3.Fit a non-return valve e and an expansion vessel b.

4.Fit a pressure relief valve m and connect the overflow side to an open wastewater pipe.

3.6.2Hot water side

See bin Figure 3.3.

n Remark

Insulating long hot water pipes prevents unnecessary energy loss.

1.Optional: fit a temperature gauge j to be able to check the temperature of the tap water.

2.Fit the T&P valve c.

3.Fit a stop valve i in the hot water outlet pipe, for use when servicing.

3.6.3Circulation pipe

See cin Figure 3.3.

If an immediate flow of hot water is required at draw-off points, a circulation pump can be installed. This improves comfort and reduces water wastage.

1.Fit a circulation pump f of the correct capacity for the length and resistance of the circulation system.

2.Fit a non-return valvee behind the circulation pump to guarantee the direction of circulation.

3.Fit two stop valves d for service purposes.

4.Connect the circulation pipe to the cold water supply pipe.

3.6.4Condensation drainage

1.Fit a sloping wastewater pipe to the siphon k for condensation drainage and connect this to the wastewater discharge in the boiler room.

cNote

All piping behind the siphon must be condensation-resistant.

Release R.1.3 UK 25