Pumps; Water Circuit; Positioning Of The Temperature Sensors - Riello Array AR 399 SE Installation, Operation And Service Manual

PRODUCT DESCRIPTION

2.12 Pumps

The Array AR 399 SE and Array AR 500 SE are equipped with a
built-in circulator with integrated check valve.
9
CAUTION: During the first start-up, and at least once a year, the
rotation of the circulator shaft should be checked as, espe-
cially after long periods of not being operated, deposits and/
or residuals could impede its free rotation.
9
CAUTION: Before loosening or removing the circulator cap, pro-
tect the electric devices located underneath from any water
that exits.
0
STOP: It is prohibited to operate the circulators without water.

2.13 Water circuit

6
5
4
3
2
10
RI
1 Heat exchanger
2 Pump
3 Check valve
4 Drain cock
5 Minimum Water Pressure
Switch (set to 7 psi/0.5
bar)
6 NTC return sensor
Fig. 5 Water circuit
1 11 7 8 9
MI
7 Safety water high-limit
thermostat temperature
sensor
8 NTC flow sensor
9 Automatic air vent
10 Flow-meter
11 LWCO
MI Central heating supply
RI Central heating return

2.14 Positioning of the temperature sensors

1 Limit thermostat temperature
2 Water temperature sensor
3 Return temperature sensor
4 Flue sensor
4
Fig. 6 Positioning of the temperature sensor
14
1
2
3