Grant Spira Series User Manual

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2 Technical Data
2.1 Boiler and Hopper Technical Data
Units 5-18 6-26 9-36
Maximum heat output kW
Btu/h
18
61 400
26
88 700
36
122 800
Flow connection - 1” BSP (female) 1” BSP (female) 1¼” BSP (female)
Return connection - 1” BSP (female) 1” BSP (female) 1¼” BSP (female)
Water content litres 51.5 51.5 60
Minimum flow rate litres/hour 756 1 080 1 512
Water resistance ΔT = 10°C mbar 50
Water resistance ΔT = 20°C mbar 40
Mains water (cleaning system) bar 1 bar operating pressure
Minimum dynamic pressure bar 0.8
Maximum mains inlet water pressure kPa 800 (8 bar)
Minimum mains inlet water pressure kPa 100 (1 bar)
Condensate connection - 1¼” BSP (female)
Conventional flue - 125mm (5”) system
Combustion chamber draught requirement mbar 0.10 to 0.15 (running)
Maximum static head m 25
Minimum circulating head m 1
Boiler temperature set point range °C 55° to 75°C
Boiler temperature cut out point °C 65° to 80°C
Minimum return temperature °C 40°C
Water system overheat cut-out temperature °C 100°C
Burn-back overheat thermostat cut-out °C 90°C
Electrical supply - 230V~50Hz single phase
Max. operating pressure - sealed system / open system bar 2.0 bar
Max. operating pressure - pressure relief valve bar 2.5 bar
Maximum auger length (bulk hopper) metres 6.0
Maximum auger speed (bulk hopper) rpm 30
Minimum flue length metres 1.6
Maximum flue length metres 12.0
Heating element rating Watts 450
Intermediate auger motor power Watts 55
Intermediate auger motor starting current Amps 0.64
Intermediate auger motor running current Amps 0.64
Intermediate auger speed rpm 8.1
Flue fan motor power Watts 32
Flue fan motor starting current Amps 0.27
Flue fan motor running current Amps 0.13
Cleaning solenoid power Watts 10
Cleaning solenoid current Amps 0.087
Burner fan motor power Watts 56
Total burner start current Amps 2.5
Total burner run current Amps 0.60

Grant Spira Series Specifications

General

Brand	Grant
Model	Spira Series
Category	Boiler
Language	English