8
221469B
HONEYWELL
S.I.T.
1 General Data
Diagram 1.1
ALL DIMENSIONS in MILLIMETRES
KEY:
15mm COMPRESSION
DOMESTIC WATER
Rc
1
/
2
(
1
/
2
in. BSPT)
GAS CONNECTION
22mm COMPRESSION
CENTRAL HEATING
SAFETY
VALVE
DISCHARGE
63
783
117
331
168
101
66
107
107
66
2.5
25
2257
2.5
25
82mm
L
C
MOUNTING
WALL
2257A
2810
WATER
THROTTLE
MINI
EXPANSION
VESSEL
HEAT EXCHANGER
Diagram 1.2
L
C
450
C.H.
MAX
D.H.W.
MAX
MIN
NOMINAL kW
HEAT
INPUT(NETT) Btu/h
NOMINAL kW
HEAT
OUTPUT Btu/h
BURNER m bar
PRESSURE in.wg
APPROX. m
3
/h
GAS RATE ft
3
/h
TABLE 1
19.71
67,240
29.3
100,000
10.6
36,167
17.6
60,000
23.4
80,000
8.8
30,000
15.8
6.3
8.0
3.3
2.1
0.9
2.1
75.8
2.8
98.5
1.2
42
PILOT
BURNER
AUTOMATIC
AIR VENT
FANNED
FLUE
MAIN BURNER
EXPANSION
VESSEL
GAS
VALVE
PUMP
PRESSURE
SWITCH
D.H.W.
COLD
INLET
C.H.
FLOW
GAS
SUPPLY
C.H.
RETURN
SAFETY VALVE DISCHARGE
D.H.W.
HOT
OUTLET
FLOW
SWITCH
SAFETYVALVE
63
This boiler will be fitted with either a Honeywell or SIT Gas
Valve. The valve used can be identified as shown.
1.1 Installation
Materials and equipment should be fit for their purpose and of
suitable quality and workmanship.
1.2 Important Notice
This boiler is for use only on G20 gas.
1.3 Sheet Metal Parts
WARNING. When installing or servicing this boiler care should
be taken when handling the edges of sheet metal parts to avoid
any possibility of personal injury.