Sc- Control Bill Of Materials; Gas Piping - Slant/Fin Jaguar Caravan Application Manual

Jaguar Caravan Modular Boilers
BILL OF MATERIALS FOR SC SERIES CONTROLLERS
Material List for SC-3
• SC-3 modular boiler control (part#435-084)
• 1 Outdoor sensor (part#339-070)
• 1 Universal sensor to be used as supply water sensor
(part#339-071)
• 1 plastic tie strap
Material List for SC-9
• 1 SC-9 modular boiler control (part#435-085)
• 1 Outdoor sensor (part#339-070)
• 2 Universal sensors (part# 339-071)
– 1 to be used as supply water sensor
– 1 can be used as return water sensor
• 2 plastic tie straps

GAS PIPING

This section contains sizing and construction recommendations
for fuel supply piping to Caravan gas-fired modular boiler sys-
tems. Gas-fired equipment must conform not only to codes of
local regulatory agencies, but also to additional specifications that
may be imposed by the utility or gas supplier. Therefore, the fol-
lowing information should be considered only as a guideline.
Figure 6 illustrates a typical gas supply line installation. It consists
of a main between the utility's meter box and the boiler system, a
main shut-off valve sediment trap, gas header pipe and drip legs
on individual boilers.
Individual gas lines to individual boiler modules should be equal
to or greater than the boilers supplied gas connection diameter.
Size of gas main and header pipes depends on volume of gas
required and acceptable pressure drop between meter and mod-
ules gas regulator valves. Minimum pressure required at each
valve is 3 inches of water column for natural gas measured while
all boilers and other gas-fired equipment on the same meter are
firing. Final pressure of gas header must vary no more than +0.3
in. of water column.
Number Cubic feet
of boilers per hour
2 780
3 1170
4 1560
5 1950
6 2340
7 2730
8 3120
9 3510
Table 1. Gas consumption rate.
Elbow
Pipe
SIze
Medium
Standard
Inches
Sweep
1/2 0.84 0.52
3/4 1.17 0.73
1 1.57 0.98
1-1/4 2.19 1.37
1-1/2 2.63 1.64
2 3.55 2.23
3 5.72 3.59
Table 2. Equivalent linear length in feet of standard iron pipe fittings for natural gas
Other Options include:
• Immersion well for supply water sensor: to be installed in
control header supplied with Caravan
• High limit (manual reset) and immersion well: to be installed in
control header supplied with Caravan
• Low water cut-off (manual reset): to be installed in modular
boiler headers above modules heat exchanger
• Domestic hot water control packages: components include
EMV valve; setpoint aquastat L6006A with immersion well.
This is to be used with external heat exchanger such as
Caravan BP series brazed plate heat exchangers.
Circulators, switches, wiring and other relays are provided by
contractors.
GAS MAIN SIZING
To determine the correct pipe diameter for the gas main serving a
specific Caravan system, proceed as follows:
a. Follow the building plans, find total length of straight pipe
between supply from gas meter and boiler gas header.
b. Using data in Table 2, calculate equivalent linear length of
screw pipe fittings used in fabrications of main. Add this to
figure from step (a) to obtain equivalent total length.
c. Find Caravan gas consumption in cubic feet per hour from
Table 1 in hot water systems.
d. Multiply the system total hourly gas consumption by flow
correction value from local utility. If not available, use
1000 btu/ft.
e. Locate system's total equivalent pipe length in right column
of Table 3.
f. Move vertically to the system's corrected flow rate calculated
in step (c). If this value falls between two of those listed,
selected larger value.
g. From this point move horizontally to the left column and read
suggested pipe diameter for gas main.
Valve
Long
Gate Globe
Sweep
0.41 0.031 2.50
0.57 0.044 3.50
0.77 0.057 4.68
1.07 0.082 6.54
1.29 0.098 7.84
1.74 1.320 10.60
2.81 2.130 17.08
Side
Return
Outlet
Bend
Angle
Tee
1.12 1.25 1.66
1.84 1.75 2.33
2.11 2.34 3.11
2.94 3.27 4.35
3.52 3.92 5.21
4.77 5.30 7.05
7.69 8.84 11.40
9