Operating instructions
2
Sentinel
Dimensions
MODEL SE-70 to SE-245
SE 70 3 283 11
1
/8 448 17
5
/8 102 4 1289 50
3
/4 143 5
5
/8 152 6 113 250
SE 105 4 359 14
1
/8 524 20
5
/8 127 5 1311 51
5
/8 181 7
1
/8 152 6 141 310
SE 140 5 435 17
1
/8 600 23
5
/8 127 5 1311 51
5
/8 219 8
5
/8 152 6 166 365
SE 175 6 511 20
1
/8 676 26
5
/8 152 6 1356 53
3
/8 257 10
1
/8 165 6
1
/2 193 425
SE 210 7 587 23
1
/8 752 29
5
/8 178 7 1376 54
3
/16 295 11
5
/8 179 7
1
/16 220 485
SE 245 8 664 26
1
/8 829 32
5
/8 178 7 1376 54
3
/16 333 13
1
/8 179 7
1
/16 247 545
Boiler
Model
Gas
Type
610m – 1220m
(2000' – 4000')
1220m – 1372m
(4000' – 4500')
Orifice
Size for
Sea
Level
Orifice Sizes for High Altitudes
Reduce output 10%
Elevation – Meters (Feet)
No. of
Sect.
Dimensions
A
mm in.
B
mm in.
D
mm in.
E
mm in.
G
mm in.
kg lb
C
mm in.
Approx.
Total Wt.
Full of Water
Natural 47 48
Propane 56 56
CHIMNEY RECOMMENDATIONS
HEIGHT: 4.6 m (15 ft.) (minimum) from draft hood skirt to top of chimney.
INSIDE DIAMETER: Same as dimension C (or larger).
NOTE: Larger chimney may be required if two or more boilers or a boiler and another appliance are vented to a
single chimney.
Orifice indicated for sea level above are factory installed in
boiler unless otherwise specified by the local authority. See
Section “III” on page 15 for burner input adjustment.
1-1/2" FPT
Supply
419 mm
(16-1/2")
552 mm (21-3/4")
3/4"
to air eliminating
system (by others)
Vent Damper*
(shown vertically)
Vent Damper*
(shown horizontally)
Sediment Trap
(required)
High Limit
Control
Ignition
Control
Blocked Vent
Safety Switch
3/4" Drain
Left End View
Front View
Right End View
1-1/2"
FPT
Return
722 mm
(28-7/16")
276 mm
(10-7/8")
Circulator:
1-1/4" Circ. Flange
1-1/2" Return
Tapping
Combination
Gas Valve
[gas tapping
1/2"]
397 mm
(15-5/8")
502 mm
(19-3/4")
324 mm (12-3/4")
Install manual gas main
shutoff valve 1524 mm
(5 ft.) above floor, when
required by local code.
Install sediment trap
and connect with
ground joint union.
Dotted piping by
installing contractor.
Note: Height dimension increases by 44 mm (1 3/4") when combustible floor kit is used.
* Vent damper may be installed horizontally on all models with use of a vent elbow. For more information, see Figure 2, page 5.
G
D
C
E
279 mm
(11")
Rollout Safety Switch
(behind front panel)
Supply Piping
(by others)
Pressure/Temp
. Gauge
76 mm
(3")
3
49
57