John Wood Commercial - ANED - Manual (Page 5)

The installation of this appliance must conform to
applicable local codes and local authorities having
jurisdictions.
Install the gas piping as indicated in Figure 2. Use only new
pipe and fittings with sound, clean-cut pipe thread. Sealing
compound must conform to the applicable code for pipe
sealing compound approved for use with natural gas and
propane. It is important to have a readily accessible manu-
al shut-off valve in the gas line supplying the heater, close
to the heater. A drip leg must be installed ahead of the gas
control valve to help trap sediments and foreign material.
A ground-joint union must be installed ahead of the gas
valve to permit easy removal of the unit.
Pipe sizing and the number of fittings used must conform to
the National Fuel Gas Code, Natural Gas Installation Code
B.149.1 or Propane Gas Installation Code B149.2.
The appliance and its gas connection must be leak tested
before placing the appliance in operation.
All leak testing must be done with soapy water solution.
Table I
Gas Supply Line Sizes (Inches)
(Based on pressure drop of 0.3 inches water column)
Correct Gas Pipe Size for Heaters Operating on:
The maximum inlet gas pressure to the appliance must not
exceed the gas pressure marked on the rating plate: 10.5”
W.C. for natural gas and 13” W.C. for propane gas.
The minimum supply pressure for the purpose of input
adjustment is 1” above manifold pressure. The appliance
and its individual shut-off valve must be disconnected from
the gas supply piping system during any pressure testing of
that system at test pressures in excess of 1/2 psig (3.5 kPa)
The appliance must be isolated from the gas supply piping
system by closing its individual manual shut-off valve during
any pressure testing of the gas supply piping system at
least pressures equal to or, less then 1/2 psig(3.5kPA)
The input rating of the appliance should be checked against
the actual input and the manifold pressure adjusted to give
the correct input. In no case should the input exceed the
rated input. Overfiring and damage to the appliance will
result. High altitude installations require an input check
since overfiring is more likely.
Page 4
IMPORTANT: GAS SUPPLY
HAVE YOU CHECKED THE GAS SUPPLIED AND COMPARED IT WITH THE GAS MARKED
ON THE RATING PLATE? SEE ALSO WARNING ON PAGE 1.
GAS CONNECTIONS
NEVER USE A MATCH OR OPEN FLAME
TO TEST FOR GAS LEAKS.
A FIRE OR EXPLOSION COULD RESULT.
RATE
BTU
INPUT
NATURAL GAS
Specific gravity 0.6
DISTANCE TO METER IN FEET
PROPANE
Specific gravity 1.53
DISTANCE TO METER IN FEET
30
1/2
3/4
3/4
1
1
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
60
3/4
1
1
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
2
2
90
3/4
1
1
1-1/4
1-1/4
1-1/4
1-1/2
2
2
2
120
3/4
1
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
2
2
2
150
1
1-1/4
1-1/4
1-1/4
1-1/4
1-1/2
2
2
2
3
180
1
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
2
2
2
3
210
1
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
2
2
2
3
58,000
95,000
150,000
200,000
250,000
300,000
400,000
500,000
600,000
750,000
30
1/2
3/4
3/4
3/4
1
1
1-1/4
1-1/4
1-1/4
1-1/4
60
1/2
3/4
3/4
1
1
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
90
1/2
3/4
1
1
1
1-1/4
1-1/4
1-1/4
1-1/2
2
120
1/2
1
1
1-1/4
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
2
150
1/2
1
1
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
2
2
180
1/2
1
1
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
2
2
210
1/2
1
1-1/4
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
2
2