IDEAL istor HE260, Installation And Servicing, Page: 4 / 80

4
istor system store -
Installation and Servicing
GENERAL
Boiler size istor HE260 istor HE325
Gas supply 2H - G20 - 20mbar
Gas Supply Connection Rc 1/2 (1/2” BSP female)
Injector size Stereomatic 5.6mm dia.
Inlet Connection Domestic Hot Water 22mm copper
Outlet Connection Domestic Hot Water 22mm copper
Flow Connection Central Heating 22mm copper
Return Connection Central Heating 22mm copper
Flue Terminal Diameter mm (in) 100 (4)
Average flue temp/mass flow rate (DHW) 74
o
C / 20.3g/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)
Maximum Domestic Hot Water Outlet Pressure bar (lb/in 2 ) 2.0 (29)
Temperature & Pressure relief valve Preset 95
o
C / 4.0 Bar opening
Electrical Supply / Power consumption 230 V ~ 50 Hz. / 148 W
Fuse Rating External : 3A Internal : 3.15A TL250 V
Water content Central Heating litre (gal) 2.0 (.44)
Domestic Hot Water 80 litre 120 litre
Packaged Weight - Boiler box kg (lb) 58.5 (129) 58.5 (129)
Packaged Weight - Tank box kg (lb) 66 (145) 73 (161)
Maximum Installation Weight -Boiler box kg (lb) 55 (121) 55 (121)
Maximum Installation Weight -Tank box kg (lb) 59 (130) 65 (143)
Boiler Casing Size Height mm (in) 1400 (55) 1600 (63)
Width mm (in) 560 (22) 560 (22)
Depth mm (in) 600 (23.6) 600 (23.6)
Potable water components on tank module
Pressure reducing valve preset to 2 bar
Thermostatic mixer max inlet temp 85 o C/max pressure 14 bar
Pressure and temp relief valve on cylinder 90
o
C and 4 bar
Pressure relief valve on inlet manifold 3 bar
DHW expansion vessel 19 litres, precharged to 2 bar
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
IE
= Ireland, GB = United Kingdom (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 : Nett CV kW 30.2
(Btu/h) (103 100)
Gross CV kW 33.5
(Btu/h) (114 300)
Gas Consumption l/s 0.87
(ft
3
/h) (110)
Maximum DHW Output kW 29.3
(Btu/h) (100 000)
DHW Storage Temp 70
o
C
DHW Delivery Temp Factory set 60
o
C
Variable on Installation only 45
o
C-65
o
C
DHW Flow Rate HE260 HE325
(Practical maximum assuming
suitable mains supply)
l/min 35 35
DHW Recovery from 15
0
C min. 14 20
After 70% draw off min. 9 12
Table 3 - Performance Data - Domestic Hot Water
Boiler Input : Max. Min.
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) (89.1) (33.2)
Boiler Output :
Non Condensing kW 23.4 8.8
(Btu/h) (80 000) (30 000)
Condensing kW 25.1 9.6
(Btu/h) (83 700) (32 800)
Seasonal efficiency (SEDBUK)* Band A [90.1]%
NOx Classification Class 5