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GAS CONNECTION
For model IB57, the gas inlet pipe size is
1
/2" NPT at the gas valve. For models IB140, IB235, and IB290,
the gas inlet pipe size is
3
/4" NPT at the gas valve. The gas supply line must be sized to adequately
provide the input BTU/Hr rate for that model at the specified flowing pressure (see table).
The maximum inlet gas pressure must not exceed
the Max value shown in the chart at right. The
Min value is for the purposes of input adjustment.
The gas valve (Fig. 5) is provided with a pressure
tap to measure the gas pressure downstream,
which is also the manifold pressure.
Gas supply piping must have a sediment trap
and a manual shutoff valve (supplied by others)
installed outside of the rear cover panel, ahead
of the booster heater's gas control (Fig. 5).
NOTE: DO NOT use teflon tape on gas line pipe threads. For gas line pipe connections, use
L
OCTITE 565, Hobart part 546292, or a flexible sealant suitable for use with Natural and LP Gases.
The heater and its gas connections must be leak tested before placing the appliance in operation. Use
soapy water for leak test. DO NOT use open flame.
The heater and its individual shutoff 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 heater must be isolated from the gas supply piping system by closing its individual manual shutoff
valve during any pressure testing of the gas supply piping system at test pressures equal to or less than
1
/2 psig (3.5 kPa).
Dissipate test pressure from the gas supply line before re-connecting the heater and its manual shutoff
valve to the gas supply line. Caution: Failure to follow this procedure may damage the gas valve.
Model IB57 Models IB140 and IB235 Model IB290
Fig. 5
SNOITACIFICEPSERUSSERPSAG
[
GNIWOLFGNIWOLF
GNIWOLF
GNIWOLFGNIWOLF
CITATSTON—ERUSSERPSAG
]
ledoM
saGfoepyTsaGfoepyT
saGfoepyT
saGfoepyTsaGfoepyT
)nmuloCretaW(.C.WsehcnI
erusserPeniLgnimocnI
dlofinaM
erusserPerusserP
erusserP
erusserPerusserP
muminiMmumixaM
,041BI,75BI
092BI,532BI092BI,532BI
092BI,532BI
092BI,532BI092BI,532BI
saGlarutaN
5.40.412.3
,041BI,75BI
092BI,532BI092BI,532BI
092BI,532BI
092BI,532BI092BI,532BI
enaporP
11312.3
OFF
NO
OFFNO
Manual Valve
Sediment Trap
Sediment Trap
Rear Panel
Rear Panel
Gas Valve
Manual Valve
Sediment Trap
Rear Panel
Gas Valve
Gas Valve
Manual Valve
PL-53289