4 filling and draining, 1 introduction, 2 filling the appliance – A.O. Smith BFC - 28 User Manual

Page 39: 1 filling unvented installations, 2 filling vented installations, Filling and draining, Introduction, Filling the appliance 4.2.1, Filling unvented installations, Filling vented installations

Introduction

Release R.1.3 UK

gis

Filling and draining

4.1

Introduction

Topics covered in this chapter:
•

•

The components referred to in these paragraphs are illustrated in

4.2

Filling the appliance

4.2.1

Filling unvented installations

To fill the appliance, proceed as follows.
1. Open the stop valve i in the hot water pipe and, if present, the stop valves

for the circulation pump.

2. Shut drain valve g.
3. Open the nearest hot water draw-off point l.
4. Open the supply valve i on the cold water side a so that cold water flows

into the appliance.

5. Completely fill the appliance (when cold water flows at normal pressure from

the nearest hot water draw-off point, the appliance is full).

6. Bleed the entire installation of air, for example by opening all hot water draw-

off points.

7. The appliance is now under water supply pressure. There should be no

water coming out of the overflow valve m nor the T&P valvec. If this does
happen, the cause might be:
-

The water supply pressure is greater than the specified 8 bar.
Rectify this by fitting a pressure-reducing valve a.

The overflow valve in the protected cold supply setup is defective or
incorrectly fitted.

4.2.2

Filling vented installations