DriSteem Vapor-Logic Instalační příručka stáhnout pdf (Strana 28)

Page 26 • DRI-STEEM GTS Humidifier 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 connecting 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 ¼" (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.

W A R N I N G !

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 an explosion or ﬁre 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. Pressure tappings for test gauges are located on all

gas valves.

• 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,

G a s p i p i n g

W A R N I N G ! Supply the humidifier

only with the gas type (natural gas or LP

gas) listed on the humidifier name plate or

burner failure or a fire may result causing

property damage, personal injury, or loss

of life. To convert the humidifier to natural

gas or LP gas, contact DRI-STEEM technical

support or your DRI-STEEM representative/

distributor.

C a u t i o n ! 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. Install a 1/8" pipe thread

(DN6) plugged tapping, accessible for test

gauge connection, immediately upstream of

the gas supply connection to the appliance.

I m p o r t a n t : 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.

More gas piping instructions on the next page ▶

Installation

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