Boiler Technical Information; Boiler Technical Data - Combi V3 And Combi Max Boilers - Grant Combi 70 V3 User's Installation Manual

4.1

Boiler technical data - Combi V3 and Combi Max boilers

Model
Boiler water content
* Weight (dry)
Max. heat input (Kerosene)
Connections: Heating flow and return
Cold water mains inlet
Domestic hot water outlet
Pressure relief valve discharge
Flue size (conventional)
Waterside resistance Flow/Return temp. diff. of 10°C
Waterside resistance Flow/Return temp. diff. of 20°C
Boiler thermostat range
Limit (safety) thermostat switch off temp.
Maximum heating system pressure (cold)
Minimum heating system pressure (cold)
Pressure relief valve
Expansion vessel
Maximum heating system volume ***
Maximum operating pressure
Minimum domestic hot water flow rate
Maximum domestic hot water temperature
Maximum mains water inlet pressure
Minimum recommended mains water inlet pressure
Max. hearth temperature
Electricity supply
Motor power
Starting current
Running current
Oil connection
Conventional flue
* Weight includes burner but excludes flue
** 22 mm hot water pipe can be connected to the Combi Max if required.
*** Based on expansion vessel charge and initial cold system pressure of 0.5 bar.
8

4 - BOILER TECHNICAL INFORMATION

Combi 70 V3
litre 80
gal 17.6
kg 158
lb 348
kW 22.0
Btu/h 75 000
Combi V3, Combi Max and Vortex Combi models
Combi 90 V3
40
8.8
158
348
27.6
94 200
22 mm copper pipe
15 mm copper pipe
15 mm copper pipe **
15 mm copper pipe
100 mm (4 in) diameter
26.5 mbar
9.5 mbar
75 to 85°C
111°C ± 3°C
1.0 bar
0.5 bar
2.5 bar
12 litres (pre-charged at 1.0 bar)
128 litres
2.5 bar
3.0 litres/min (0.66 gal/min)
65°C (factory set)
8.0 bar
2.5 bar
Less than 50°C
230/240 V ~ 50 Hz Fused at 5 Amp
90 W max.
2.60 Amp
0.85 Amp
¼" BSP Male (on end of flexible fuel line)
Minimum flue draught - 8.7 N/m² (0.035 in wg)
Maximum flue draught - 37 N/m² (0.15 in wg)
Combi Max
40
8.8
159
350
36.8
125 500