Riello Array AR 399 SE User Manual

76
RECYCLING AND DISPOSAL
76
APPENDIX
APPENDIX
Menu
Par.
No.
Nr. dis-
played
Display
Description Range
Default
setting
UM
Access
type
Category
M2 145
Hyst. Up
Quick
Stop
Denes how many degrees the temperature mea-
sured by the primary circuit's sensor must go above
the set-point in order for the subsequent boiler to
be switched off after the time interval set by Par. 143
(quick stop mode).
0 - 72
(0 - 40)
11 (6) °F (°C) I Cascade
M2 146
Hyst. Up
Stop All
Denes how many degrees the temperature mea-
sured by the primary circuit's sensor must go above
the set-point in order for all "On" sensor to be
switched off at the same time.
0 - 72
(0 - 40)
14 (8) °F (°C) I Cascade
M2 147
Number
of Units
Denes the number of boilers of which the cascade
system consists of.
1 - 6 6 I Cascade
M2 148
Power
Mode
Denes the cascade operation mode.
0 Disabled
1 Min burners
2 Max burners
2 I Cascade
M2 79
Max.
Setp.
Offset
Down
Denes the maximum decrease in the primary cir-
cuit's cascade set-point. It is based on the primary
circuit's sensor reading.
0 - 72
(0 - 40)
5.6 (2) °F (°C) I Cascade
M2 80
Max.
Setp.
Offset
Up
Denes the maximum increase in the primary cir-
cuit's cascade set-point. It is based on the primary
circuit's sensor reading.
0 - 72
(0 - 40)
9 (5) °F (°C) I Cascade
M2 81
Start
Mod.
Delay
Fact.
Denes the time in minutes from the moment the
demand is triggered until the activation of the set-
point increases or decreases provided for by Par. 79
and 80.
0 - 60 60 Min. I Cascade
M2 82
Next
Module
Start
Rate
Denes the minimum power for at least one of the
boilers in the cascade system in order for the next
boiler to be switched on (if the other conditions
linked to Par. 75 and 77 are met).
10 - 100 80 % I Cascade
M2 83
Next
Module
Stop
Rate
Denes the maximum power for all the boilers
in cascade in order for the last boiler on to be
switched off (if the other conditions linked to Par.
76 and 78 are met).
10 - 100 25 % I Cascade
M2 84
Module
Rotation
Interval
It denes the time interval (in days) after which
boilers are rotated.
0 - 30 1 Days I Cascade
M2 149
First
Module
to Start
Establishes the number of the next boiler to be
rotated (this value is automatically updated at each
rotation).
1 - 16 1 I Cascade
M2 152
Pwr-
Mode2
Min
Power
Denes the power value (in percentage terms)
against which the average power of all on boilers
in cascade operation mode must be compared (Par.
148 = 2).
0 - 100 20 % I Cascade
M2 153
Pwr-
Mode2
Hyster-
esis
Denes the Hysteresis power value (in percentage
terms) compared to the average power of all on
boilers in cascade operation mode (Par. 148 = 2).
0 - 100 40 % I Cascade
M2 154
Post-
Pump
Period
Denes pump overrun time in seconds at the end
of the cascade heat demand.
0 - 255 60 Sec. I Cascade
M2 155
Frost
Protec-
tion
Denes the temperature (detected by the prima-
ry sensor) below which the boiler circulator and
the system circulator (with cascade conguration)
activate. If the temperature of the primary sensor
falls another 9°F (5°C) below the value set by Par.
155, then a request to activate the cascade system
is generated. When the temperature of the pri-
mary sensor reaches the value dened by Par. 155
increased by 9°F (5°C), then the request ceases and
the cascade returns to stand-by mode.
18 - 54
(10 - 30)
27 (15) °F (°C) I Cascade

Riello Array AR 399 SE Specifications

General

Brand	Riello
Model	Array AR 399 SE
Category	Water Heater
Language	English