Riello ARRAY v2

THE ULTIMATE IN EFFICIENCY,
REDUNDACY & RELIABILITY


The Riello Array is a pre-packaged boiler plant, the new standard in boiler efficiency, redundancy and reliability.
Each Array boiler utilizes multiple heat exchanger modules, providing high turndown and multiple boiler redundancy in one packaged unit.
A single Array boiler provides superior uptime reliability that is only found in larger boiler plants and multi boiler systems.

NEW ENHANCED BENEFITS

  • Reduced head loss provides for greater design flexibility
  • Increased vent lengths
  • Improved serviceability
  • Enhanced software capabilities

KEY FEATURES

  • One platform, multiple capacities
  • Built in redundancy. Each 500 MBH module is independent and "stand-alone" ensuring continued boiler operation if an adjacent module is turned off or even removed
  • Extremely simple plug & play installation, service & maintenance
  • Dedicated pump for each module eliminates need for boiler circulating pump
  • Standard integrated boiler cascade capability for up to 8 boilers
  • Factory installed flue exhaust damper on each module allows common venting capability of Array boilers in cascade and eliminates off cycle heat loss
  • Heat Exchanger Protection: Control monitors supply and return temperature and prevents heat exchanger from excessive temperature rise
  • Standard integrated boiler freeze protection

HIGH PERFORMANCE

  • High quality AISI 316L stainless steel heat exchanger
  • True counterflow 4-pass design
  • Efficiency up to 99%
  • NOx emissions less than 9 PPM at 3% O2
  • Turndown ratio up to 40:1 per boiler; up to 320:1 per system
  • ASME Design Pressure 80 PSI
  • Low noise operation (each module
  • Low pressure gas capability

FLEXIBLE INSTALLATION

  • Single point connections for hydronic, electrical, fuel and venting
  • Small footprint, fits through standard doorway
  • Venting flexibility including sidewall, through the roof and direct vent options up to 100 equivalent feet exhaust vent length
  • Venting Materials: CPVC, Polypropylene or AL29-4C stainless steel

GRAPHIC TOUCHSCREEN CONTROL


STANDARD ON-BOARD CONTROL FEATURES

  • 7" color touch screen
  • Graphic display of actual input rate for cascade, boiler and modules
  • User-Friendly text driven menus to monitor the whole cascade (up to 8 boilers) or each single module
  • Immediate access to Cascade, Supply, Return, Flue temperatures and Fan speed of each module
  • Simple access to Settings, Commissioning, Maintenance procedures and Error Log through the touch screen
  • Graphic outdoor reset adjustment
  • In addition to integrated Modbus, additional BMS gateways available for BACnet, Metasys and Lon Works protocols
  • Control provides remote operation through 0-10Vdc set point control


LOOKING INSIDE


ADVANCED PRE-MIX BURNER


The Riello Array Premix combustion system is comprised of a stainless steel mesh burner integrated with a modulating gas valve and high performance fan.
The proportional control guarantees a consistent air to fuel ratio throughout the entire range of modulation resulting in clean efficient combustion.

PATENTED RIELLO HEAT EXCHANGER

  • Heat exchanger with a unique helix design
  • Advanced design for superior reliability and industry leading longevity
  • Large heat exchanger surface area in a compact design
  • High water velocity and large tube diameter eliminates scaling
  • Better heat transfer results in increased fuel savings and lower operating costs
  • Vortex flow meters monitor and ensure correct flow through each heat exchanger
  • The design ensures minimum waterside pressure drop and highly efficient heat transfer
  • Fully redundant design during heat exchanger service or maintenance
  • Single point connections for hydronic, electrical, fuel and venting
  • Smallest installed footprint enables easy installation and minimizes mechanical room space
  • Individual pump for each heat exchanger eliminates need for boiler circulating pump
  • Independent service controller for detailed commissioning and troubleshooting
  • Every boiler is 100% live fire tested prior to shipment

INSTALLATION ADVANTAGES

  • Ease of commissioning & maintenance
  • Minimum training required
  • Saves space and easy to install
  • Perfect for new installation and retrofit projects
  • Cascade up to 8 boilers (64 modules) for a maximum system turndown up to 320:1

OPERATION & MAINTENANCE

  • 100% redundancy always delivers reliable performance with no downtime
  • Simple maintenance: each module can be serviced while the others are running
  • Easy rol l-out module configuration allows for easy removal, service and maintenance


POWER RANGE



DIMENSIONS





Description   AR 1000 AR 1500 AR 2000 AR 3000 AR 4000
A - Width inch 33.3 33.3 33.3 35.4 35.4
  mm 846 846 846 899 899
B - Length inch 60.8 60.8 60.8 72.8 72.8
  mm 1544 1544 1544 1849 1849
C - Height inch 67.2 67.2 83 83 83
(*) mm 1707 1707 2108 2108 2108

(*) Bottom feet may be removed to reduce overall height by 2" during installation if required


TECHNICAL SPECIFICATIONS


Model Unit AR 1000 AR 1500 AR 2000 AR 3000 AR 4000
Boiler Category ASME Sect.IV
Type of Gas Natural Gas, Propane
Max input rate BTU/hr 1,000,000 1,500,000 2,000,000 3,000,000 4,000,000
  (kW) (293) (440) (586) (879) (1172)
Min input rate BTU/hr 100,000 100,000 100,000 100,000 100,000
  (kW) (29) (29) (29) (29) (29)
Turndown Rate 10:01 15:01 20:01 30:01:00 40:01:00
Gas Connections (NPT) Ø Inch 1 1/2" 1 1/2" 1 1/2" 2" 2"
Max. NG Pressure Inch W.C. 20 20 20 20 20
  (mbar) (50) (50) (50) (50) (50)
Min. NG Pressure Inch W.C. 4.0 4.0 4.0 4.0 4.0
  (mbar) (10.0) (10.0) (10.0) (10.0) (10.0)
Max. LPG Pressure Inch W.C. 20 20 20 20 20
  (mbar) (50) (50) (50) (50) (50)
Min. LPG Pressure Inch W.C. 8 8 8 8 8
  (mbar) (19.9) (19.9) (19.9) (19.9) (19.9)
Water Connections Ø Inch 3" 3" 4" 4" 4"
Max. Allowable Working Pressure (MAWP) PSI (bar) 80 (5.5) 80 (5.5) 80 (5.5) 80 (5.5) 80 (5.5)
Water Volume Gallon (liter) 12 (46) 18 (69) 24 (92) 36 (138) 48 (184)
Vent (slip-on) / Air Inlet Connections Ø Inch 6"/6" 8"/8" [8" or 10"]/10" (*)
  (Ø mm) (150/150) (200/200) ([200 or 250]/250)
Venting Materials CPVC, PPs, Stainless Steel AL29-4C
Max operating temperature °F (°C) 194 (90) 194 (90) 194 (90) 194 (90) 194 (90)
Max HE allowable temperature °F (°C) 210 (98.9) 210 (98.9) 210 (98.9) 210 (98.9) 210 (98.9)
Storage temperature °F 5 to 158 5 to 158 5 to 158 5 to 158 5 to 158
  (°C) (-15 to 70) (-15 to 70) (-15 to 70) (-15 to 70) (-15 to 70)
Ambient Room Temperature Operating Range °F 32 to 120 32 to 120 32 to 120 32 to 120 32 to 120
  (°C) (0 to 49) (0 to 49) (0 to 49) (0 to 49) (0 to 49)
Total Heating Surface Area SQFT (m2) 86 (8) 129 (12) 172 (16) 258 (24) 344 (32)
Standard Listings & Approvals ETL, ASME, AHRI, CSD-1 and SCAQMD
Electrical Requirement V/Ph/Hz 120/1/60 120/1/60 230/1/60 230/3/60 230/3/60
  FLA (**) 20.3 24.0 20.1 20.1 30.2
Weight (Dry) lbs (kg) 1058 (480) 1323 (600) 1676 (760) 2315 (1050) 2998 (1360)
Dimensions WxHxD (***) Inch 33.3x67.2x60.8 33.3x67.2x60.8 33.3x83x60.8 35.4x83x72.8 35.4x83x72.8
  (mm) 846x1707x1544 846x1707x1544 846x1707x1544 899x2108x1849 899x2108x1849
(*) The boiler is supplied with a removable vent reducer
(**) FLA (Full Load Amperage) - maximum current drawn by the boiler if all pumps reach rated horsepower
(***) Bottom feet may be removed to reduce overall height by 2" during installation if required

TEN YEAR HEAT EXCHANGER WARRANTY

Riello warrants that the heat exchanger of the Boiler shall be free of defects in material and workmanship for TEN (10) YEARS from the date of manufacture.

Riello warrants that the Boiler and approved accessories designated by Riello as standard equipment shall be free of defects in manufacture, material and workmanship for 18 months from shipment or 12 months from start-up (whichever comes first).