Stage 3 - Gas Supply Connection - Neptronic SKG3 Series Installation Instructions Manual

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Gas pipe diameter
1/8'' NPT Plugged taping for
test pressure gauge
SKG3
2 ¾'' (70)
Gas leak test
Stage 3 – Gas Supply Connection
CAUTION: Gas piping installation MUST comply with all local codes and regulations,
and current ANSI Z223.1, ''National Fuel Gas Code'' or CAN/CSA-B149.
Gas pressure to the Humidifier MUST never exceed 26'' w.c. (6kPa).
A manual shut off valve (not supplied) MUST be installed on the Gas supply line to the
Humidifier. Ensure adequate size for the Gas supply line (see below table).
A ⅛'' NPT plugged tapping for test pressure gauge connection should be installed
immediately upstream of the Gas supply line.
Pressure tapings for test gauges should be located at Gas valve.
Pipes should be inspected for dirt and chips after threading and reaming the end of
pipes.
Gas piping installation should be supported so that no strains are imposed on the
Humidifier or controls.
Two wrenches should be used when connecting piping to Humidifier.
Drip pocket should be provided at any low spot in the Gas line.
Minimum Gas pipe gradient should be ¼'' (1.5mm) in 40'' (1m) horizontal run.
Air purge should be done by disconnecting piping at Gas valve.
Air purge MUST NOT be done at Heat exchanger of the Humidifier.
After installation, field piping and Humidifier Gas train should be checked for leak.
Do not use soap solution or open flame on humidifier gas train. Gas Leak Detector
should be used.
All leaks MUST be sealed prior to commissioning the Humidifier.
110, 155, 180, 210,
265, 310, 350, 405
505, 560, 610,
710, 765, 810
Please refer to local codes and regulations regarding type, volume of Gas handled, for
pressure drop allowed in the Gas line and to determine Gas pipe diameter.
When multiple modules SKG3 Humidifier is installed consideration should be taken to
total capacity, gas flow and length of main.
¼ turn Gas Valve
Pressure testing of the Gas supply piping should be performed by the Gas
Installer in accordance with local codes and regulations.
Test pressure should be relieved from the Gas piping system prior to opening
the manual shut off valve of the Humidifier.
For any test pressure over 50psig (350kPa) Humidifier MUST be
disconnected (at Gas shut off valve).
Gas supply pressure at the inlet pressure tap, when all burners running,
should be:
•
7'' w.c. (1.75kPa) for Natural Gas.
•
14'' w.c. (3.5 kPa) for Propane and Butane.
16
SKG3 Steam Humidifier
Model
Connection size
SKG3-
SKG3-
Drip Pocket
Gas
1'' NPT
Female
1-1/2'' NPT
Female
(Fig. 22)
dimensions in bracket
are in mm