A.O. Smith 290 service manual 1.5.3Water circuit - hydraulics diagram

1.5.3Water circuit – hydraulics diagram

UNVENTED

14 14 14

11

4 12 T B

6

513 4

C

				16
A
4	1	5	15	9

VENTED

A

H

19

4

18

		17
E				12	T
					B
	11
14					13
14
14	C	4	5	6	4

4

9

I

Legends		14.	hot water draw-off points
Only applicable numbers are mentioned.		15.	expansion valve (mandatory)
1.	pressure-reducing valve	16.	expasion vessel (mandatory)
	(mandatory if the mains water	17.	3-way aeration valve
	pressure exceeds 8 bar)		(recommended)
4.	stop valve (recommended in pipe	18.	water tank
	C and mandatory in pipe A)	19.	float valve

5.non-return valve (mandatory)

6.circulation pump (optional)

9.drain valve (mandatory)

11.service stop valve (recommended)

12.temperature gauge (recommended)

13.condensation drainage (mandatory)

A.cold water supply

B.hot water supply

C.circulation pipe

E.overflow pipe

H.overflow safety

43