Keston Combi C30 - 1 General

8
Installation and Servicing
SECTION 1 - GENERAL
Table 1 - General Data
*Required for maximum ow rate. Boiler operates down to 2 l/min DHW delivery
** In areas of low water pressure the DHW restrictor can be removed
30 35
Gas supply 2H - G20 - 20mbar
Gas Supply Connection 15mm copper compression
Injector Size mm 4.65 4.9
Inlet Connection DHW 15mm copper compression
Outlet Connection DHW 15mm copper compression
Flow Connection CH 22mm copper compression
Return Connection CH 22mm copper compression
Flue Terminal Diameter mm (in) 50 (nominal)
Average Flue Temp-Mass Flow Rate (DHW) 68
o
C - 13g/s 73ºC - 15g/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)
1.3 (18.9) (130) 1.3 (18.9)** (130)
Minimum DHW Inlet Pressure to operate at 0.6
bar system pressure
bar 0.5
Electrical Supply 230 V ~ 50 Hz.
Power Consumption W 101 114
Fuse Rating External : 3A Internal : T4A HRC L250 V
Water content CH litre (gal) 1.2 (0.26)
DHW litre (gal) 0.5 (0.11)
Packaged Weight kg 34.40 34.50
Maximum Installation Weight kg 31.40 31.50
Boiler Casing Size Height mm 700
Width mm 395
Depth mm 278
Note. Gas consumption is calculated using a
caloric value of 38.7 MJ/m
3
(1038 Btu/ft
3
) gross
or 34.9 MJ/m
3
(935 Btu/ft
3
) nett
To obtain the gas consumption at a different
caloric value:
a. For l/s - divide the gross heat input (kW) by
the gross C.V. of the gas (MJ/m
3
)
b. For Btu/h - multiply the gross heat input (kW)
by 26.8
c. For ft
3
/h - divide the gross heat input (Btu/h)
by the gross C.V. of the gas (Btu/ft
3
)
d. For m
3
/h - multiply l/s by 3.6
Key to symbols
GB = United Kingdom IE = Ireland (Countries of destination)
PMS = Maximum operating pressure of water
C13 C33 C53 = 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
orices which, in this case, are concentric. The fan is up stream of
the combustion chamber.
I
2H
= An appliance designed for use on 2nd Family gas, Group H only.
* 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 certied by a notied body.
Table 2 - Performance Data - Central Heating Table 3 - Performance Data - Domestic Hot Water
Boiler Input : Max. Min. 30 Min. 35
Boiler Input ‘Q’ Nett CV kW 24.3 6.1 7.1
Gross CV kW 27.0 6.7 7.9
Gas Consumption m
3
/h 2.512 0.623 0.734
(ft
3
/h) (89) (22) (25.9)
Boiler Output :
Non Condensing 70
o
C Mean Water temp. kW 24.2 6.1 7.1
Condensing 40
o
C Mean Water temp. kW 25.6 6.4 7.5
Seasonal efciency* SEDBUK 2005
SEDBUK 2009
91.1%
89.6%
91.1%
89.6%
NOx Classication CLASS 5
Maximum DHW Input : 30 35
Nett CV kW 30.4 35.4
Gross CV kW 33.7 39.3
Gas Consumption m
3
/h 3.135 3.658
(ft
3
/h) (111) (129)
Maximum kW 30.3 35.3
DHW Flow Rate l/min 12.4 14.5
at 35°C temp. rise. (gpm) (2.8) (3.2)
DHW Specic Rate l/min 14.5 16.9
(gpm) (3.2) (3.7)