Morco GB24, Technical Instructions

Page: 4 / 44

4
SECTION 1 - GENERAL
Note. Gas consumption is calculated using a
calorific value of 95.65 MJ/m
3
(2569 Btu/ft
3
) gross
or 88 MJ/m
3
(2360 Btu/ft
3
) nett
To obtain the gas consumption at a different
calorific value:
a. For l/s
- divide the gross heat input
(kW) by the gross C.V. of the gas (MJ/m
3
)
b. For ft
3
/h - divide the gross heat input (Btu/h)
by the gross C.V. of the gas (Btu/ft
3
)
c. For m
3
/h - multiply l/s by 3.6.
Key to symbols
PMS = Maximum operating pressure of water
C
13
C
33
= A room sealed appliance designed for connection via ducts to a
horizontal or vertical terminal, which admits fresh air to the burner
and discharges the products of combustion to the outside through
orifices which, in this case, are concentric. The fan is up stream of
the combustion chamber.
I
3P
= An appliance designed for use on 3rd Family gas, Group P only.
II
2H3P
= Appliances capable of using gases of Group H and gases of Group P.
* The value is used in the UK Government’s Standard Assessment Procedure (SAP) for energy rating of dwellings. The test data from
which it has been calculated have been certified by a notified body.
Table 1 - General Data
Maximum DHW Input : 24 30
Nett CV kW 24.3 30.4
Btu/h 82,912 103,725
Gross CV kW 26.4 33
Btu/h 90,077 112,596
Gas Consumption m
3
/h 1.00 1.25
ft
3
/h 35.33 44.20
kg/h 1.83 2.26
Maximum kW 24.2 30.3
DHW Output Btu/h 82,570 103,384
DHW Flow Rate l/min 9.9 12.4
at 35°C temp. rise. gpm 2.2 2.8
DHW Specific Rate l/min 11.5 14.5
gpm 2.5 3.2
Boiler Input :
Max. Min.
24 30 24 30
Boiler Input ‘Q’ Nett CV kW 24.3 24.3 8.0 8.0
Btu/h 82,912 (82,912 27,296 27,296
Gross CV kW 26.4 26.4 8.7 8.7
Btu/h 90,077 90,077 29,684 29,684
Gas Consumption m
3
/h 1.00 1.25 0.329 0.329
ft
3
/h 35.33 44.20 11.62 11.62
kg/h 1.83 2.26 0.58 0.58
Boiler Output :
Non Condensing
kW 24.2 24.3 8.00 8.00
70
o
C Mean Water temp. Btu/h 82,570 82,570 27,296 27,296
Condensing kW 25.6 25.6 8.5 8.5
40
o
C Mean Water temp. Btu/h 87,347 87,347 29,002 29,002
Seasonal efficiency* SEDBUK 2005 91% 91.1%
Seasonal efficiency* SEDBUK 2009 89% 89%
NOx Classification CLASS 6
Table 2 - Performance Data - Central Heating
Table 3 - Performance Data - Domestic Hot Water
*Required for maximum flow rate. Boiler operates down to 2 l/min DHW delivery
Morco GB
Series II
24 30
Gas Supply II
2H3P
- G31 - 37mbar (I
3P
- G31 - 30mbar DE)
Gas Supply Connection 15mm copper compression
Injector Size mm 3.75 3.75
Inlet Connection Domestic Hot Water G ½
Outlet Connection Domestic Hot Water G ½
Flow Connection Central Heating G ¾
Return Connection Central Heating G ¾
Flue Terminal Diameter mm (in) 100 (4)
Average Flue Temp-Mass Flow Rate DHW 63ºC - 11g/s 68ºC - 13 g/s
Maximum Working Pressure (Sealed Systems) bar (lb/in
2
) 2.5 (36.3)
Maximum Domestic Hot Water Inlet Pressure bar (lb/in
2
) (kPa) 10.0 (145) (1000)
Minimum Domestic Hot Water Inlet Pressure* bar (lb/in
2
) (kPa) 0.8 (11.6) (80) 1.3 (18.9) (130)
Electrical Supply 230 V - 50 Hz.
Power Consumption W 146 152
Fuse Rating External : 3A Internal : T4H HRC L250 V
Water Content Central Heating litre (gal) 1.2 (0.26)
Domestic Hot Water litre (gal) litre (gal) 0.5 (0.11)
Packaged Weight kg (lb) 33.8 (74.4) 34.1 (75.2)
Maximum Installation Weight kg (lb) 31 (68.3) 31.2 (68.8)
Boiler Casing Size Height mm (in) 700 (27.5)
Width mm (in) 395 (15.5)
Depth mm (in) 285 (11.2)