Carlin 201GAS - Manual (Page 9)

Model 201GAS burner — Instruction manual
Carlin part number MN201GAS Rev. 03/14/11
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Where appliance instructions differ from this manual, follow the appliance instructions.
2. Install gas piping from meter to combination gas valve
Code compliance
The burner/appliance installation must comply with codes listed on page 2 and
any other locally applicable codes.
Piping from meter to burner
Connect from the gas supply to the burner combination gas
valve inlet using new, clean black iron pipe and malleable iron
fittings only. Do not use copper, brass, cast iron or galvanized
pipe or fittings.
Provide support for gas piping. Do not rest weight of piping
on burner gas valve.
Apply pipe dope sparingly at all joints. Use only pipe dope listed
for use with propane gas. Do not use pipe sealing tape.
Do not hold gas valve with pipe wrench. Use crescent wrench
or other smooth-jawed device. Do not overtighten.
Failure to comply with above could result in severe personal
injury, death or substantial property damage.
1. If possible, install a new gas line directly from the gas meter. If you
are using an existing gas line, verify it is clean and in good condition,
and verify it is large enough to handle the load of all connected appli-
ances.
2. When branching from a common gas line, do not tap off from the bottom
of horizontal sections — only from the side or top.
3. Install a main manual shutoff valve, sediment trap and ground joint union
near the burner combination gas valve connection as shown in Figure 7.
4. If the burner is installed inside an appliance jacket, install the main manual
gas valve and sediment trap external to the jacket.
5. Size piping (or verify size) using Table 2. You will find additional information
on gas line sizing in the National Fuel Gas Code, NFPA 54/ANSI Z223.1,
or B149.1/B149.2 Installation Code for Canadian installations.
Gas supply pressure — natural or propane
• Maximum supply pressure: 14 inches w.c.
• Minimum supply pressure: 5 inches w.c.
Do not expose the combination gas valve to gas pressure in
excess of 14 inches water column. Higher pressure could dam-
age the valve seat, resulting in potentially hazardous condition.
When pressure testing piping at higher pressures, disconnect
burner from gas line before testing.
If the gas supply pressure can exceed 14 inches water column at
any time, you must install a lockup type gas pressure regulator
in the gas supply piping, ahead of the main manual gas valve
installed at the burner.
Test and purge gas line
Read WARNING above.
Pressure test and purge the line. Pressure testing should be done by the gas
supplier or utility, following all applicable codes.
Table 2 Capacities of black iron pipe, cubic feet gas/hour
1 Pipe to meter or branch
2 Main manual gas shutoff valve
3 Use clean, burr-free black iron
pipe and malleable iron fittings
4 Ground joint union
5 Sediment leg
Figure 7 Connecting gas supply piping to burner
6 Burner combination gas valve
7 Upstream pressure tap, 1/8”
8 Outlet pressure tap, 1/8”
9 Gas regulator access screw
10 Gas valve wire junction box
In the state of Massachusetts, when lever-type gas shutoffs are
used, they must be T-handle type only.
Capacities in cubic feet per hour
for pipe carrying natural gas or propane
Pipe size
(inches)
Total length of gas piping,
from meter to burner connection (feet)
20 40 60 80 100
Natural gas @ .60 specific gravity, pressure drop 0.3 in. w.c. (note 1)
½ 92 63 50 43 38
¾ 190 130 105 90 79
1 350 245 195 170 150
1¼ 730 500 400 350 305
Natural gas @ .60 specific gravity, pressure drop 0.5 in. w.c. (note 1)
½ 120 82 66 57 50
¾ 250 170 138 118 103
1 465 320 260 220 195
1¼ 950 660 530 460 400
Propane gas @ 1.55 specific gravity, pressure drop 0.3 in. w.c.
½ 57 39 31 27 24
¾ 118 81 65 56 49
1 217 152 121 105 93
Propane gas @ 1.55 specific gravity, pressure drop 0.5 in. w.c.
½ 74 51 41 35 31
¾ 155 105 86 73 64
1 288 198 161 136 121
Note 1 For natural gas with specific gravity other than 0.60,
consult National Fuel Gas Code, NFPA 54/ANSI
Z223.1, or Canadian B149.1/B149.2 for correction
factor.