Table of Contents
Advertisement
3.8 -
GAS CONNECTION
DANGER
The gas connection must be carried out by a
registered engineer who will have to respect
and comply to the regulations in force and to
the requirements indicated by the local gas
supplier. An incorrect installation could
cause injury to persons, animals or damage
to property. The manufacturer shall not be
held liable for any injury and/or damage.
WARNING
LATTNER wall mounted boilers are built to run
on Natural Gas or Propane Gas.
The gas type the boiler is suitable for is
indicated on the packaging label and on the
data plate boiler.
First check the identification plate on the boiler
for the suitable gas type.
DANGER
Do not use the boiler for another type of gas
than indicated on the identification plate of the
boiler. This will cause improper functioning and
can damage the boiler.
Natural gas:
refer to chapter
Propane gas:
refer to chapter
The gas supply connection must comply with lo-
cal regulations or, if such regulations do not exist,
with the National Fuel Gas Code, ANSI Z223.1/
NFPA 54.
For Canada, the gas connection must comply with
local regulations or, if such regulations do not exist,
with the CAN/CSA-B149.1-05 - Natural Gas and
Propane Installation Code
Before installing the boiler it is recommended to
thoroughly clean all the supply piping in order to
remove any eventual residual grime which could
compromise the boilers correct functioning.
As a safety measure against gas leaks,
LATTNER recommends installing a surveillance
and protective system made up of a gas leakage
detector combined with an on-off selenoid valve
on the gas supply line.
DANGER
Always check the safety of the gas pipe system
by means of a bubble test using leak-search
spray.
The boiler and its individual shut off valve must
be disconnected from the gas supply piping sy-
stem during any pressure testing of that system
at test pressures in excess of 1/2 PSI (3.5kPa).
The boiler 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 PSI (3.5 kPa).
3.8.1 -
Pipe sizing for natural gas
-
Gas piping
The connection to the boiler must include a suitable method
of disconnection and a gas control valve must be installed
adjacent to the boiler for isolation purposes. The nominal inlet
working gas pressure measured at the boiler should be 7"
W.C. (18 mbar) for Natural gas (Gas A).
Maximum pressure with no flow (lockup) or with the boiler
running is 10.5 inches W.C. Minimum pressure with the gas
flowing (verify during boiler startup) is 4.0 inches W.C.
3.8.2 -
3.8.1
Pipe sizing for propane gas
3.8.2
-
Propane Supply Pressure Requirements
-
-
-
-
Ensure that the high gas pressure regulator is installed at
least 6 to 10 feet upstream of the boiler.
Gas piping
-
-
The connection to the boiler must include a suitable method
of disconnection.
The nominal inlet working gas pressure measured at the boi-
ler should be 11" W.C. (27 mbar) for Natural gas (Gas E).
A gas control valve must be installed adjacent to the boiler for
isolation purposes. The nominal inlet working gas pressure
measured at the boiler should be 11 inch W.C. (27 mbar) for
Propane gas (Gas E).
Instructions for the installer
GAS CONNECTION WITH NATURAL GAS
Contact gas supplier to size the gas supply line and meter.
GAS CONNECTION WITH PROPANE GAS
Contact gas supplier to size pipes, tanks, and 100% lockup
gas pressure regulator.
Adjust propane supply regulator provided by the gas sup-
plier for 13 inches W.C. maximum pressure.
Pressure required at gas valve inlet pressure port:
Maximum 13 inches W.C. with no flow (lockup) or with
boiler running.
Minimum 8 inches W.C. with gas flowing (verify during
boiler startup).
Use a gas shut off valve compatible with propane gases.
A sediment trap must be provide upstream of the gas con-
trols.
19
Advertisement
Table of Contents
