Ariston Velis Evo 45L User Manual (English)

To Next Page

To Previous Page

11 / EN

WORKED EXAMPLE

The example below is for a G 1/2” temperature & pressure relief valve with a discharge pipe (D2) having

4 no. elbows and length of 7 m from the tundish to the point of discharge.

From Table 2

Maximum resistance allowed for a straight length of 22 mm copper discharge pipe (D2) from G 1/2” T

& P valve is 9 m. Subtract the resistance for 4 no. 22 mm elbows at 0.8 m each = 3.2 m. Therefore the

maximum permitted length equates to: 5.8 m.

As 5.8 m is less than the actual length of 7 m therefore calculate the next largest size

Maximum resistance allowed for a straight length of 28 mm pipe (D2) from G 1/2” T & P valve equates

to: 18 m.

Subtract the resistance for 4 no. 28 mm elbow at 1.0 m each = 4 m. Therefore the maximum permitted

length equates to: 14 m

As the actual length is 7 m, a 28 mm (D2) copper pipe will be satisfactory.

DRAINING THE APPLIANCE

The appliance must be drained if left inactive in a room

subject to frost and/or in the event of prolonged inactivity.

Typical drain arrangement and system designs will vary:

1. Turn power o to ensure appliance is not operated

when empty.

2. Turn o cold supply to appliance.

3. Shut o hot water feed from appliance.

4. Connect hose to drain cock and place other end in sink,

basin etc.

5. Open drain cock and open TPR valve to vent cylinder.

ELECTRICAL WARNING

The appliance must be earthed

The electrical installation must be in line with the current I.E.E. wiring regulations. A mains supply of 240

VAC 3 kW (13 amps) is required (Fig. 2)

Heat resisting cable, round 3 core 1.5 mm (to BS 6141 table 8) should be used to connect to the electrical

supply through either:

- a 13 amp socket to BS 1363; or

- a double pole fused isolating switch with a contact separation of 3 mm minimum on each pole.

Flexible cables are colour coded as follows:

Brown ................................................................. live

Blue ..................................................................... neutral

Green and yellow ........................................... earth

Need help?

Do you have a question about the Ariston Velis Evo 45L and is the answer not in the manual?

Ariston Velis Evo 45L Specifications

General