Glow-worm 18sxi, Installation And Servicing Manual, Page: 7 / 64

7
1 Boiler Specification
13498
Table 1. Flow Rate
MODEL MINIMUM FLOW RATE
18sxi
774 litres/hr.
30sxi 1289 litres/hr.
This is equal to 20
o
C differential at maximum heat input.
BOILER SPECIFICATION 18sxi 30sxi
Lift weight 36kg (80Ib) 39kg (86Ib)
Total weight (installed) 41kg (90Ib) 44.5kg (98Ib)
Gas connection 15mm copper 15mm copper
Heating flow & return connection Ø O.D. 22mm. copper 22mm. copper
Condensate connection Ø I.D. 21.5mm. plastic 21.5mm. plastic
Safety valve 3 bar (43/5Ibf/in
2
) 3 bar (43/5Ibf/in
2
)
Safety valve discharge 15mm. copper 15mm. copper
Expansion vessel capacity 8 litres (1.76 gallons) 8 litres (1.76 gallons)
Expansion vessel charge pressure 0.5bar (7,3Ibf/in
2
) 0.5bar (7,3Ibf/in
2
)
Electrical supply 230V~50Hz fused 3A 230V~50Hz fused 3A
Electrical rating 180W fused 3A 180W fused 3A
EN60529 IP clasification IPX4D IPX4D
Internal fuse rating on main PCB 2A 2A
Gas supply (governed meter only) II
2H3P
G20 natural gas II
2H3P
G20 natural gas
Inlet gas working pressure 20mbar 20mbar
Burner % CO
2
case on 9.3 nominal 9.3 nominal
Burner % CO
2
case off 9.1 nominal 9.1 nominal
2.0 m
3
/h 3.0 m
3
/h
71 ft
3
/h 107 ft
3
/h
0.53 m
3
/h 0.53 m
3
/h
18.7 ft
3
/h 18.7 ft
3
/h
Flue type C
13
, C
33
, C
53
C
13
, C
33
, C
53
NOx Class 5 Class 5
Heat output condensing mode 20.02kW 30.58kW
Heat input Nett Q = kW max. 18.9 min. 5 max. 28.6 min. 5.3
Heat output P = kW max. 18.57 min. 4.95 max. 28.17 min. 5.25
SEDBUK rating Band A 90.4% Band A 90.6%
Approximate max. gas rate
after 10 mins. from cold
Approximate min. gas rate
after 10 mins. from cold