2
3
4
5
SLZeand w,-_tal[the gas supply plpmg properly in
ordeT to provide a supply of gas sufflc,ent to meet
the maximum demand wlthout undue loss of
pressure between the meter and the boder
Determine the volume of gas to be provlded to the
boller in cublc feet per hour To obtain this value,
thv]de the Btu per hour rating (on the boiler rating
plate) by the heating value ot the gas ]n Btu per
cubic feet Obtain the heating value of the gas from
the gas suppher As an alternatwe use Table 1 2 or
3 on the next page to obtain the volume of gas to be
p_ovLded to the boder
Use the value obtained above as the bas_s for p_pmg
SLZmg SLze the gas piping m accordance w_th Table
4 Consult the Natzonal Fuel Gas Code ANSI
Z223 I,'NFPA 54 for other slzlng optmns
Locate the drop pipe adjacent to, but not m front of
the boder
Install a sedlment trap See Figure 15 Locate a tee
m the drop plpe at same elevatlon as the gas inlet
connechon to the bo_Ler Extend the drop p_pe to a
pLpe cap
Install a ground joint umon ahead of the gas control
assembly to permit serwcmg of the control Some
Localcodes reqmre an additional serwce valve when
using the combmat,on gas controls If your code
reqmres such a valve a suggested IocatLon Lsshown
in FLgure 15
Use a pipe joint sealing compound that is resistant to
the action of tiquefied petroleum gas. A non-resistant
compound may lose sealing ability in the presence of
this gas, resulting in a gas leak and fire or explosion
potential.
Check pLpmg for leaks
Use an approved gas detector, a non-corroslve leak
detectlon flu,d or other leak detecUon method If
leaks are found turn off all gas flow and repalr as
necessal_j
j _ SERVICE
-----JAC K ET
_GJ. UNION
_ I _fSEDIMENT TRAP
_/FLOOR LINE
Figure 15: Gas Connection to Boiler
8 Disconnect the boiler and its ]ndlwdual shut-off valve
from the gas supply piping system dunng any
pressure testLng of that system at test pressure m
excess of i '2 psLg (3 5 kPa)
Do not subject the gas valve to more than 1/2 psi
pressure. Doing so may damage the valve.
Isolate the boiler from the gas supply p_pmg system
by closing _ts _ndw_dual serwce valve dunng any
pressure testing of the gas supply plpmg system at
test pressure equal to or less than i 2 pslg (3 5 kPa)
9 Mlmmum permlsslble supply pressule for purposes of
,nput adjustment (Inches Water Column)
MI-09 Standing Pdot Natural Gas 5 2"
All other MI/MIH Natural Gas 5 0"
All MI LPGas II 0"
Maximum permlsslble supply pressure to the boder
(Inches Water Column)
All MI/MIH Natural Gas 13 5"
All MI LP Gas 13 5"
When checking for leaks, do not use matches,
candles, open flames or other methods that provide a
source of =gnition.This can ignite a gas leak,
resulting in fire or explosion.
13
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