Boiler 250 500 750 1000
Gas supply 2H - G20 - 20mbar
Gas supply connection (in. BSP) R1
1
/4 R2 R2 R2
1
/2
Flow connection (in. BSP) 2
1
/2" PN16 5" PN16 5" PN16 5" PN16
Return connection (in. BSP) 2
1
/2" PN16 5" PN16 5" PN16 5" PN16
Hydraulic Resistance @ 20
o
C mbar 410 410 410 410
Max Press (sealed system) bar (psi) 6 (87) 6 (87) 6 (87) 6 (87)
Maximum Static Head m (ft) 61 (200) 61 (200) 61 (200) 61 (200)
Boiler Electricity Supply 230V - 50Hz
Boiler Fuse Rating 1 x 5A Internal 2 x 5A Internal 3 x 5A Internal 4 x 5A Internal
Power Consumption (boiler only) W 350 680 1020 1350
Air Inlet (optional) O/D mm 300 300 300 300 x 2
Flue Size dia mm 150 250 250 300
Condensate drain mm 21.5 2 x 21.5 3 x 21.5 4 x 21.5
Boiler dry weight (unpacked exc. headers) kg (lb) 229 420 611 845
Water Content l (gal) 14.8 (3.26) 29.6 (6.52) 44.4 (9.78) 59.2 (13.0)
IP Rating
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 1 Performance Data
Boiler 250 500 750 1000
Boiler output Max kW 232.5 465 697.5 930
(non-condensing) Btu/h 793,378 1,586,774 2,350,184 3,173,512
Mean 70
o
C Min kW 46.7 46.7 46.7 46.7
Btu/h 159,325 159,325 159,325 159,325
Boiler output Max kW 252.5 505 757.5 1010
(condensing) Btu/h 861,530 1,723,060 2,584,590 3,446,120
Mean 40
o
C Min kW 51.4 51.4 51.4 51.4
Btu/h 175,404 175,404 175,404 175,404
Boiler Input Net kW 238 476 714 952
Max Rate Btu/h 812,056 1,624,112 2,486,168 3,248,224
Gross kW 264.1 523.2 792.3 1056.4
Btu/h 901,109 1,802,218 2,703,327 3,604,436
Boiler Input Net kW 47.6 47.6 47.6 47.6
Min Rate Btu/h 162,411 162,411 162,411 162,411
Gross kW 52.8 52.8 52.8 52.8
Btu/h 180,256 180,256 180,256 180,256
Maximum Gas Rate m
3
/h 25.2 50.4 75.6 100.8
ft
3
/h 889.9 1779.8 2,669.7 3,559.6
Approx. ue gas @ max. rate m
3
/h 391 783 1174 1566
volume (@80
o
C) i.e. non-condensing ft
3
/h 13,808 27,615 41,459 55,303
Max. Flue Resistance Pa 105 105 105 105
Flue Gas CO
2
@ Max Rate % 9.1 ±0.2 9.1 ±0.2 9.1 ±0.2 9.1 ±0.2
G20/LNG @ Min. Rate % 8.4 ±0.2 8.4 ±0.2 8.4 ±0.2 8.4 ±0.2
NOx with O
2
= 0% mg/kWh 39.7 39.7 39.7 39.7
Seasonal Boiler Efciency (Building Regs L2)
%
Note. Natural gas consumption is calculated using a caloric value of 37.8MJ/m
3
(1038Btu/ft
3
) gross or 34 MJ/m
3
(910 Btu/ft
3
) nett at 15
o
C and 1013.25 mbar.
a.
For l/s divide the gross heat input (kW) by the gross C.V. of the gas (MJ/m
3
)
b. For ft/h
3
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.
HEALTH & SAFETY DOCUMENT NO. 635
The electricity at work regulations, 1989. The manufacturer's notes must NOT
be taken, in any way, as overriding statutory obligations.
IMPORTANT. These appliances are CE certied for safety and performance.
It is, therefore, important that no external control devices, e.g. ue dampers,
economisers etc., are directly connected to these appliances unless covered by
these Installation and Servicing Instructions or as otherwise recommended by
Ideal Boilers in writing. If in doubt please enquire.
Any direct connection of a control device not
approved by Ideal Boilers could invalidate the
certication and the normal appliance warranty.
It could also infringe the Gas Safety Regulations
and the above regulations.
External Supply Rating In determining the mains
supply characteristics, the installer must consider
the total power ratings of the boiler module(s) and
any associated pumps which derive their supply
from the boiler. With this information, appropriate
supply cable sizes, protection device and
protective earth requirements can be calculated.
Electricity supply and Fuse rating for pumps etc. refer to manufacturer's instructions.
Table 2 General Data
*
*
IP20
2
- Installation & Servicing
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