23
9
CAUTION
: To ensure the tightness of the boiler, use a self-
locking wire connector and tighten it on the wire.
9
WARNING
: It is the responsibility of the installer to provide
suitable grounding for the appliance; the manufacturer will
not be liable for any damage resulting from an incorrect or
absent ground connection.
It is forbidden to use gas and/or water pipes as a ground to
electrical appliances.
Use the power cable supplied to connect the boiler to the main
power supply.
If the power cable has to be replaced, use the original spare part.
MAIN SUPPLY CONNECTION
The power supply cable has to pass through the related
strain relief (see figure below).
9
CAUTION
: The electrical socket must be provided on the right
or left side of the boiler.
It is forbidden to put the electrical socket under the
boiler.
7.9
1
St raight-Th ru:
Hey co HFC-Z 1/2
Lis ted under UL
File #E-206446
2
St rain R elief Bushings :
Hey co SR 7K-2
Lis ted under UL File
#E- 15331 C S A
LR89 19
Strain relief for
power supply cable
120V inputs
Low Voltage Connections
(Auqastat or Tank Sensor)
External wiring limitations
Any external wiring must remain within the limits as detailed in
the table below
Connection
Maximum length
ft
meters
Outdoor temperature sensor
100
30
Room thermostat
100
30
OT connection
100
30
7.10 Ou
tdoor temperature sensor
The outdoor temperature sensor supplied as standard inside the
boiler box must be connected at terminals SE-G terminals of CE8.
Once the sensor is connected the boiler automatically adjusts
to operate with the sensor. See Section 11.13 Setting the Outdoor
Reset Curve with Outdoor Sensor.
7.11 3 way
valve/ pump card management (BE09)
A 3 way valve/pump card (BE09) is a available as an accessory for
the
Family PRO 42 KIS-IS
. This card under normal circumstances
allows the boiler to close a relay on the card to activate a device
such as a pump when there is a call for heat.
When using the accessory card in conjunction with a RiCLOUD
thermostat it is possible to control a two temperature system.
In this situation the RiCLOUD will be used as a the high
temperature zone and will take priority.
The low temperature zone will be controlled by the ON/OFF
thermostat connected to W and R terminals.
Working mode BE09
− The supply temperature setpoint for an ON/OFF thermostat on
W and R terminals is set directly on the boiler, otherwise the
OT setpoint is calculated by the RiCLOUD.
− The RiCLOUD can also act as an ON/OFF
thermostat connected
to W and R terminals, either wired or wireless, instead of on
the OT connection.
− The accessory card (BE09) has two relays to choose from.
The first relay is a normally open relay with two terminal
connections. The second relay is a normally open/normally
closed relay which has three terminal connections including
a common. This one is used to alternate between the high/
low temperature in a two temperature system. When using
the first relay, the on/off switch of the relay activates from an
OT request (if there is a OT request the relay is closed).
− The accessory card (BE09) is activated on the above version
with DO_AUX1 parameter set to 1. If DO_AUX1 parameter is set
to 2, the relay is used to activate a second pump on the circuit
– the second pump runs when the primary pump runs (the
second pump will shutdown if there is instantaneous DHW
request).
X16
X2
X21
X8
1
1
1
1
4
3
5
4
6
VIOLA (VIOLET) (-)
ROSSO (RED) (alim.)
1
3
BIANCO (WHITE) (sign.)
CN2
CN5
NO
COM
NC
BE09
NO
COM
NC
RELA
Y
HIGH TEMPERATURE: OT+ CONTROL
SETTING
LOW TEMPERATURE: W R CONTROL
(ON/OFF)BOILER SETTING
3WAY VALVE CONTROL/PUMP
use cable L= 190
7.12
Other devices
Contact Riello North America’s technical department should
you require additional specific information on the suitability
of a particular control. Further guidance on the recommended
practice for the installation of external controls, can be found
below.
9
IMPORTANT
− The boiler must always be supplied with a permanent 120V
- 60Hz electrical supply.
− Do not connect any controls or auxiliary equipment to the
24V terminal strip, other than those approved/supplied by
the manufacturer.
7.13
Check/control water chemistry
9
WARNING
: Do not use petroleum-based cleaning or sealing
compounds in heating system. Damage to elastomer seals
and gaskets in the system could occur, resulting in substantial
property damage.
Water pH over 7.0
− Maintain a water pH over 7.0 for a stainless steel heat exchanger
and below 8.0 if there are aluminium components in the
heating system. Check with litmus paper or have the system
chemically analysed by water treatment company.
− If pH differs from above, consult the local water treatment
company for treatment needed.
Hardness less than 9 Grains/US Gallon.
− Consult the local water treatment companies for unusually
hard water areas (above 9 Grains/US Gallon hardness).
Chlorine concentration less than 50 ppm
− Filling with chlorinated fresh water should be acceptable since
drinking water chlorine levels are typically less than 4 ppm.
− Do not use the boiler to directly heat a swimming pool or spa
water.
− Do not fill boiler or operate with water containing chlorine in
excess of 50 ppm.
Clean system to remove sediment
− You must thoroughly flush the system (without the boiler
connected) to remove sediment. The high-efficiency heat
exchanger can be damaged by build up or corrosion due to
sediment.
− Flush system until water runs clean and you are sure piping
is free of sediment.
Test/replace glycol fluid
− For systems using glycol fluids, follow glycol manufacturer’s
instructions to verify the inhibitor level and that other fluid
characteristics are satisfactory.
− Do not exceed 40 % of the system volume with glycol fluids.
NOTICE
: Glycol must be replaced periodically due to degradation
of inhibitors over time. Follow all glycol manufacturer’s
instructions.
Summary of Contents for Family PRO 42 IS
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