MHS Boilers STRATA 3 220, Instructions For Installation, Servicing & Operation

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6
STRATA3
3.2 critical dimensions
Dimensions in millimetres
H
E
B
P
R
A
D
F
G
J
K
O
35 : 50
C
360
S
L1 L2
N
M
I
Depth A
Height B
Width C
Height to gas connection D
Dimension K
Gas Inlet Connection O
Safety Valve Connection E
Height to Flue Gas Connection F
Flue Gas Connection Diameter M
Height to Air Supply Connection G
Air Connection Diameter
N
(used when room sealing the Boiler)
Dimension H
Height to Condense Waste Outlet I
Height to Flow/Return Connections J
Spare Tapping P
Flow Connection L1
Return Connection L2
Dimemsion to Air Supply Connection R
Condense Waste Connection S
Strata 3-220
1755
1430
628
1235
500
1” BSP M
1” BSP M
555
Ø DN150 *
930
Ø DN100 **
150
170
1270
1” BSP M
DN 40 PN6
DN 40 PN6
575
DN 40
Strata 3-330
1755
1700
628
1515
500
1 1 /
2
” BSP M
1 1 /
2
” BSP M
496
Ø DN200 *
1310
Ø DN100 **
250
175
1735
1” BSP M
DN 50 PN6
DN 50 PN6
575
DN 40
Fig 3.2a
Table 2
* Female socket with M + 10mm ID
** Male spigot with N + 10mm OD
3.3 system guidance
The Strata 3 boilers are designed to operate on a flow to return temperature drop of 20K. Systems
must be sealed and pressurised to operate within the range 0.5 bar to 5.3 bar.
3.4 flue options
The Strata 3 boiler may be used with either an open or room sealed flue/air system. Approximately
200Pa is available as residual flue pressure at the exit from the appliance. Full details regarding flue
specification are given in section 4.3.