Riello NXHM - Page 16

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ENGLISH
8.4 Application 4
Space heating with an auxiliary boiler (alternating operation).
Space heating application by either the unit or by an auxiliary boiler connected in the system.
 The unit controlled contact (also called "permission signal for the auxiliary boiler") is determined by the outdoor temperature (thermistor
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 Bivalent operation is possible for both space heating operation and domestic water heating operation.
 If the auxiliary boiler only provides KHDWIRUVSDFHKHDWLQJWKHERLOHUPXVWEHLQWHJUDWHGLQWKHSLSLQJZRUNDQGLQWKH¿HOGZLULQJDFFRU-
ding to the illustration for "Application A".
 ,IWKHDX[LOLDU\ERLOHULVDOVRSURYLGLQJKHDWIRUGRPHVWLFKRWZDWHUWKHERLOHUFDQEHLQWHJUDWHGLQWKHSLSLQJZRUNDQGLQWKH¿HOGZLULQJ
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boiler control itself in DHW mode.
b
CAUTION
Be sure that the boiler and the integration of the boiler in the system is in accordance with relevant local laws and regula- tions.
8.4.1 Application A
Boiler provides heat for space heating only.
2
3
----
FHL1 FHL2
----
FHLn
12.1
12.2
12.3
12
13
14
15
16
16
22
11
67
8.1
8.2
8
10
9
4
AHS
18
1
1.5
1.4
1.2
1.3
1.7
1.6
1.1
8.4.2 Application B
Boiler provides heat for space heating and domestic water heating. The boiler activates by itself the domestic hot water heating.
AHS
2
3
----
FHL1 FHL2
----
FHLn
12.1
12.2
12.3
12
13
14
15
16
16
16
22
11
67
8.1
8.2
8
10
9
4
18
1
1.5
1.4
1.2
1.3
1.7
1.6
1.1