Product specifications

Natural Gas & Propane (Propane in brackets where different)
3. Technical Data
24/80 24/80 Plus 32/80 Plus 38/80 Plus
Heat power input (gross) kW min - max 7.5 – 25.0 7.5 – 25.0 10.0 – 32.7 11.3 – 37.8
CONDENSING MODE (Return < 55
0
C)
Heat output to radiators kW min - max 7.3 – 23.0 7.3 – 23.0 9.8 – 29.0 (29.9) 10.9 - 34.4
Maximum heat to radiators Btu/hr 78,500 78,500 99,000 (102,000) 117,400
Gross efficiency max- min 98 – 91% 98 – 91% 98 – 91% 96.7 – 91%
NON-CONDENSING MODE (80/60
0
C flow/return)
Heat output to radiators kW min - max 6.9 – 22.0 6.9 – 22.0 9.3 – 27.6 (28.5) 10.5 – 32.0
Maximum heat to radiators Btu/hr 75,000 75,000 94,200 (97,300) 109,200
Gross efficiency max- min 93 - 87% 93 - 87% 93 - 86% 93 - 85%
Seasonal efficiency (Sedbuk certified) % 91.3 91.3 91.0 TBA
Gas flow rate m3/hr natural gas min/max 0.8 – 2.6 0.8 – 3.3 1.0 – 3.5 1.2 – 4.0
Gas flow rate m3/hr propane gas min/max (0.3 – 0.9) (0.3 – 1.2) (0.4 – 1.5) (0.5 – 1.7)
Flue gas temperature min/max
0
C 35/110 35/110 40/115 35/110
HOT WATER SYSTEM
Maximum heat to hot water kW 17.4 26.4 27.6 (28.5) 32.2
Hot water flow rate maximum litres/min at 2 bar 25 25 25 25
Reheat time from 10 to 60
0
C minutes 20 12 11 (10) 9
70% reheat time minutes 17 10 9 8
Hot water at 40
0
C instantaneously (litres) 133 133 133 133
Hot water per hour at 40
0
C (litres) 450 700 725 (750) 840
Hot water per hour at 40
0
C (gallons) 100 150 160 (165) 185
EMISSIONS
NOx (average) emission ppm 18 18 19 TBA
CO (average) emission ppm 10 10 20 TBA
GC Number 41 – 249 - 02 41 – 249 - 03 41 – 249 - 04 TBA
COMMON DATA
Hot water temp setting range 60 to 70
0
C
Central heating setting range 60 to 90
0
C
Hot water tank capacity 80 litres
Primary water capacity 2.2 litres
Hot water expansion vessel capacity 5 litres
C/ Heating expansion vessel capacity 8 to 18 litres
Maximum supply pressure 12 bar
Electrical supply volts 220/240V
Outlet pressure hot and cold water 3.5 bar
Air supply pipe diameter 80mm
Flue pipe diameter 80mm
Heating flow & return connection 22mm
Hot water outlet connection 15mm
Cold water supply pipe (to PRV) 22mm
Cold water supply appliance connection 15mm
Gas supply pipe (min for Natural Gas) 22mm
Gas pipe appliance connection ½ inch BSPM
Safety valve discharge connection 22mm
Condensate discharge drain connection 32mm
Auxiliary heating flow connection ½ inch BSPF
Height 1090mm
Width 530mm
Depth 507mm
Weight empty (full) 75kg (150kg)
Protection Class IP44
ATMOS MULTI Mk 2 version 2008
Page 6
Dimensions of Multi