Riello Family PRO 42 IS, Installation & Operating Instructions For Contractors

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9
WARNING : for LP boilers only — Your propane supplier mixes
an odorant with the gas to make its presence detectable.
In some instances, the odorant can fade, and the gas may
no longer have an odor. Before start-up (and periodically
thereafter), have the LPG supplier verify the correct odorant
level in the gas.
9
WARNING :
− Cover endangered positions before leak testing.
− Do not spray the leak testing agent onto cables, plugs or
electrical connection lines.
− Do not allow it to drip onto them either.
9
DANGER : Leaks may be caused to pipes and screw connections
during commissioning and maintenance activities.
- Carry out a proper leak test.
- Only use approved leak detection agents for leak detection.
- Disconnect the heating system from the power supply
− Check the exterior tightness of new pipe sections up to
and including the direct sealing point on the gas burner
connection.
B
B= Manual main gas shutoff
valve (supplied but not
installed)
NOTICE : When installing the gas supply connection, it must
comply with local regulations or, if such regulations do not
exist, with the National Fuel Gas Code, ANSI Z 223.1/NFPA 54 in
the United States. In Canada, the gas supply connection must
comply with local regulations or, if such regulations do not exist,
with CAN/CSA B149.1, Natural Gas and Propane Installation Code.
A sediment trap must be provided upstream of the gas controls.
NOTICE : The boiler must be isolated from the gas supply piping
system by closing its individual manual shutoff valve during any
pressure testing of the gas supply piping system at test pressures
equal to or less than 1/2 psi (3.5 kPa).
7.7 Electrical connections
A qualified electrician has to connect the electrical supply to the
appliance. If controls – external to the appliance – are required,
a competent person must undertake the design of any external
electrical circuits.
Wiring to the appliance must be rated for operation in contact
with surfaces up to 194°F (90°C).
9
If an external electrical source is utilized, the boiler,
when installed, must be electrically bonded to ground in
accordance with the requirements of the authority having
jurisdiction or, in the absence of such requirements, with the
National Electrical Code, ANSI/NFPA 70 and/or the Canadian
Electrical Code Part 1, CSA C22.1, Electrical Code.
9
WARNING: ELECTRICAL SHOCK HAZARD — For your safety, turn
off the electric power supply at service entrance panel before
making any electrical connections to avoid possible electric
shock hazard. Failure to do so can cause severe personal
injury or death.
− NOTICE : the boiler must be electrically grounded as required
by National Electrical Code ANSI/NFPA 70 — latest edition.
9
CAUTION : Label all wires prior to disconnection when
servicing controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after servicing.
Low voltage connections
Carry out the low voltage connections as follows:
− use the external low voltage connectors supplied
− 4-poles connector for BUS 485 (- A B +) signal
− 8-poles connector for TBT - TA -OT - SE signal
- A B +
CE4
TBT
OT SE
white
black
W R C G
CE8
Connector Label Description
CE4 (- A B +) Bus 485
CE8 TBT Low Temperature Thermostat
SE - G Outdoor Temperature Sensor
OT - G Open therm (OT)
R Room Thermostat (24V)
W Room Thermostat - Heating
C Room Thermostat - Common
M4a (PRO IS) T.BOLL. DHW Aquastat
S.BOLL. DHW 10kOhm NTC
carry out electric connections using the desired connector
IMPORTANT
This boiler is equipped with a feature that saves energy by reducing
the boiler water temperature as the heating load decreases. This
feature is equipped with an override which is provided primarily
to permit the use of an external energy management system
that serves the same function. THIS OVERRIDE MUST NOT BE USED
UNLESS AT LEAST ONE OF THE FOLLOWING
CONDITIONS IS TRUE:
- ⁰An external energy management system is installed that
reduces the boiler water temperature as the heating load
decreases.
- ⁰This boiler is not used for any space heating
- ⁰This boiler is part of a modular or multiple boiler system
having a total input of 300,000 BTU/hr or greater.
- ⁰This boiler is equipped with a tankless coil.
Insert correctly the connector into its counterpart.
CE4
CE8
9
CAUTION : It is recommended to use wires not exceeding 20
AWG (0.5 mm
2
). All wiring must be in accordance with local
codes and the National Electrical Code ANSI/ NFPA 70 - latest
edition. In Canada, the installation must conform to CSA
C22.1 Canadian Electrical Code Part 1 and any local codes.