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Vi. Water Piping and Trim
Burn Hazard. Safety relief valve discharge
piping must be piped such that the potential of
severe burns is eliminated. DO nOT pipe in any
area where freezing could occur. DO nOT install
any shut-off valves, plugs or caps. Consult local
codes for proper discharge piping arrangement.
2 Circulator (Required)
circulators will be required to properly install a
Alpine™ Series boiler. See Paragraph B above for
information on sizing the circulators.
3. Expansion Tank (Required)
replacing an existing boiler with no other changes
in the system, the old expansion tank can generally
be reused. If the expansion tank must be replaced,
consult the expansion tank manufacturer's literature
for proper sizing.
4. Fill Valve (Required)
(recommended) or automatic fill valve may be used.
However, if automatic refill is employed, a water
meter must be added to evaluate the makeup water
volume taken after initial fill and eliminate any
water leakage as early as possible.
Table 14: Fitting and Valve Equivalent Length
Copper Fitting and Sweat Valve
Equivalent Length (Ft)
Fitting or Valve
Description
90° Elbow
45° Elbow
Tee (through flow)
Tee (Branch flow)
Diverter Tee (typical)
Gate Valve
Globe Valve
Angle Valve
Ball Valve (standard port)
Ball Valve (full port)
Swing Check Valve
Flow-Check Valve
(typical)
Butterfly Valve
NOTE: Table 14 is provided as reference to assist in piping design and specifies equivalent length of typical piping fittings and
valves.
58
C. Standard Installation Requirements (continued)
CaUTiOn
– Usually at least two
– If this boiler is
– Either manual
Copper Pipe or Valve Size
1
1¼
1½
2.5
3.0
4.0
1.0
1.2
1.5
0.5
0.6
0.8
4.5
5.5
7.0
23.5
25.0
23.0
0.3
0.4
0.5
25.0
36.0
46.0
5.3
7.8
9.4
4.3
7.0
6.6
1.9
1.4
2.2
4.5
5.5
6.5
54.0
74.0
57.0
2.7
2.0
2.7
5. Automatic Air Vent (Required)
automatic air vent is required. Manual vents will
usually be required in other parts of the system to
remove air during initial fill.
6. Manual Reset High Limit (Required by some
Codes)
and some other codes. Install the high limit in the
boiler supply piping just above the boiler with no
intervening valves. Set the manual reset high limit
to 200°F. Wire the limit per Figures 27 and 28 in
Section VIII Electrical.
7. Flow Control Valve (Strongly
Recommended)
The flow control valve prevents flow through the
system unless the circulator is operating. Flow
control valves are used to prevent gravity circulation
or "ghost flows" in circulator zone systems through
zones that are not calling for heat.
8. Y-strainer (Recommended)
equivalent strainer removes heating system debris
from hydronic systems and protects boiler heat
exchanger from fouling up. Install the strainer
downstream of full port isolation valve, at the inlet
side of the circulator, for easy service.
9. Isolation Valves (Strongly recommended)
Isolation valves are useful when the boiler must be
drained, as they will eliminate having to drain and
refill the entire system.
Table 14: Fitting and Valve Equivalent
Threaded Fitting and Valve Equivalent Length (Ft)
2
Fitting or Valve
5.5
Description
2.0
90° Elbow
1.0
Long Radius
9.0
Elbow (45° or 90°)
23.0
Tee (through flow)
0.7
Tee (Branch flow)
56.0
Close Return Bend
12.5
Gate Valve (full open)
14.0
Globe Valve (full open)
1.3
Angle Valve (full open)
9.0
Swing Check Valve
(full open)
177.0
Flow-Check Valve
4.5
(typical)
– This control is required by ASME CSD-1
–
Length (continued)
Black Threaded Pipe or
1
2.6
1.4
1.8
5.3
4.4
0.7
30.0
39.0
13.0
17.0
8.7
12.0
42.0
60.0
–At least one
– A Y-strainer or
–
Valve Size
1¼
1½
2
3.5
4.0
5.2
1.8
2.2
2.8
2.3
2.7
3.5
6.9
8.1
10.0
5.8
6.7
8.6
0.9
1.1
1.4
46.0
59.0
20.0
26.0
13.0
17.0
63.0
83.0
103448-07- 1/16
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