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GTS HUMIDIFIER LX SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
GAS PIPING GUIDELINES
• After threading and reaming the ends of the pipes, inspect piping and
remove loose dirt and chips.
• Support piping so there are no strains imposed on unit or controls.
• Use two wrenches when tightening piping to unit or controls.
• Provide a drip pocket before each unit and in the line where low spots
cannot be avoided.
• Takeoff to unit should come from top or side of main to avoid trapping
condensate.
• Piping that is subject to wide temperature variations should be insulated.
• Pitch piping up toward unit at least 1/4" (6 mm) per 15' (4.5 m) of
horizontal run.
• Compounds used on threaded joints of gas piping must be resistant to the
harmful action of liquefied petroleum gases.
WARNING
Fire or explosion hazard
Purge air before lighting unit by disconnecting piping at gas control. In no case should
line be purged into heat exchanger. Failure to follow these instructions could cause a
fire or explosion, resulting in bodily injury, death, or significant property damage.
• After installation, check field piping and humidifier gas train for gas leaks.
• Do not use soap solution or open flame on humidifier gas train. A gas leak
detector is recommended.
• Install a ground joint union and a manual shutoff valve immediately
upstream of the unit. Install a plugged tapping upstream of the shut-off
valve, accessible for test gauge connection (see Caution).
• Allow at least 5' (1.5 m) of piping between any high pressure regulator
and unit pipe connection.
• Piping installation must conform to the requirements of the authority having
jurisdiction or, in the absence of such requirements, must conform to:
• In the United States: The National Fuel Gas Code, ANSI Z223.1
(latest edition).
• In Canada: Local plumbing or waste water codes and other applicable
codes and with the current code CAN/CGS-B149.1, “Installation
Code for Natural Gas Burning Appliances and Equipment,” or CAN/
CGA-B149.2, “Installation Code for Propane Burning Appliances and
Equipment.”
• In Europe: The National Gas Safety (Installation & Use) Regulations.
Important:
For North American models,
the recommended supply pressure is 7" wc
(1.75 kPa) for natural gas or 11" wc (1.83
kPa) for LP gas.
For European models, the required supply
pressure is 20 or 25 mbar for natural gas and
30, 37, or 50 mbar for propane gas.
INSTALLATION
Gas
WARNING
Fire hazard
Supply the humidifier only with the
gas type (natural gas or LP gas) listed
on the humidifier name plate. Failure
to supply the humidifier with the listed
gas type could result in burner failure
or a fire, causing property damage,
personal injury, or death.
To convert the humidifier to natural
gas or LP gas, contact DriSteem
Technical Support or your DriSteem
Representative/Distributor.
CAUTION
Install connection for gas pressure test
gauge
Gas pressure to the humidifier controls
must never exceed 24" wc (6 kPa, 60
mbar), or the gas valve will become
damaged and require replacement.
The gas pressure diagnostic port on
the gas valve can be used to check
pressure. Loosen the screw and push
a 5/16" ID hose over the fitting
connected to a gauge. Remove the
hose and tighten the screw when
finished.
Install a 1/8" pipe thread (DN6)
plugged tapping, accessible for
test gauge connection, immediately
upstream of the gas supply connection
to the appliance.
Piping:
