IDEAL isar HE24 User Manual

4
isar - Installation and Servicing
GENERAL
isar HE24 HE30 HE35
Gas supply 2H - G20 - 20mbar
Gas Supply Connection Rc 1/2 (1/2” BSP female)
Injector Size Stereomatic 5.6mm dia. 5.7mm dia
Inlet Connection Domestic Hot Water 15mm copper compression
Outlet Connection Domestic Hot Water 15mm copper compression
Flow Connection Central Heating 22mm copper compression
Return Connection Central Heating 22mm copper compression
Flue Terminal Diameter mm (in) 100 (4)
Average Flue Temp-Mass Flow Rate (DHW) 66
o
C-10g/s 74
o
C - 12 g/s 82
o
C-14g/s
Maximum Working Pressure (Sealed Systems) bar (lb/in
2
) 2.5 (36.3)
Maximum Domestic Hot Water Inlet Pressure bar (lb/in
2
) 10.0 (145)
Minimum Domestic Hot Water Inlet Pressure bar (lb/in
2
) 0.5 (7)
Electrical Supply 230 V ~ 50 Hz.
Power Consumption 148 W 148 W 152 W
Fuse Rating External : 3A Internal : T3.15A L250 V
Water content Central Heating litre (gal) 2.0 (0.44)
Domestic Hot Water 0.5 (0.11)
Packaged Weight kg (lb) 52 (115) 52 (115) 53 (117)
Maximum Installation Weight kg (lb) 42.5 (94) 43 (95) 43.5 ( 96)
Boiler Casing Size Height mm (in) 687 (27)
Width mm (in) 390 (15 3/8)
Depth mm (in) 278 (11)
Table 1 - General Data
Note. Gas consumption is calculated using a
calorific 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
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
)
Key to symbols
GB = United Kingdom IE = Ireland (Countries of destination)
PMS = Maximum operating pressure of water
C
13
C
33
C
53
= 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
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 certified by a notified body.
CAUTION. To avoid the possibility of injury during the installation, servicing or cleaning of
this appliance care should be taken when handling edges of sheet steel components
Table 2 - Performance Data - Central Heating
Maximum DHW Input : HE24 HE30 HE35
Nett CV kW 24.3 30.2 36.0
(Btu/h) (82 900) (103 000) (122 800)
Gross CV kW 27.0 33.5 39.9
(Btu/h) (92 100) (114 400) (136 200)
Gas Consumption l/s 0.7 0.87 1.03
(ft
3
/h) (89.0) (110) (131)
Maximum kW 23.4 29.3 35.2
DHW Output (Btu/h) (80 000) (100 000) (120 000)
DHW Flow Rate l/min 9.6 12.0 14.4
at 35°C temp. rise. (gpm) (2.1) 2.6 (3.2)
DHW Specific Rate l/min 11.2 14.0 16.8
(gpm) (2.5) (3.1) (3.7)
Table 3 - Performance Data - Domestic Hot Water
Boiler Input : Max. Min.
Boiler Input ‘Q’ Nett CV kW 24.4 9.1
(Btu/h) (83 300) (31 000)
Gross CV kW 27.1 10.1
(Btu/h) (92 500) (34 400)
Gas Consumption l/s 0.70 0.26
(ft
3
/h) (89.0) (33.1)
Boiler Output :
Non Condensing kW 23.4 8.8
70
o
C Mean Water temp. (Btu/h) (80 000) (30 000)
Condensing kW 25.1 9.6
40
o
C Mean Water temp. (Btu/h) (85 700) (32 800)
Seasonal efficiency* (SEDBUK) Band A [90.1]%
NOx Classification Class 5
203319-3.pmd 27/03/2008, 08:144

IDEAL isar HE24 Specifications

General

Brand	IDEAL
Model	isar HE24
Category	Boiler
Language	English