Patterson-Kelley MACH-05 manual Vent Elbows, tape on gas line threads, Intake Termination Details

MACH® Series Gas-Fired Boiler

	Outside Plate
	Cover Plate
Centering	Fastener	Field Provided
Support Plate	Sealant
		Inlet Screens

Recommended

SealantTermination

12" min.

Intake Termination Details

3.6.13 Vent Elbows

Installation

WARNING!

All threaded connections must be made using a pipe compound that is resistant to the action of liquefied petroleum gases. Do not use Teflon

tape on gas line threads.

Remote Gas Shutoff (not supplied)

Natural Gas
Supply	By Installer

Union

Drip Leg

The turn from horizontal to vertical should be made with two 45º ells or with one long radius 90º ell for best operation. Do not use "short radius" ells.

Meter

Shutoff (on boiler)

3.7GAS PIPING

Before making the gas hook-up, make sure the boiler is being supplied with the type of fuel shown on the boiler nameplate.

The boiler shall be installed such that the gas ignition system components are protected from water (dripping, spraying, rain, etc.) during appliance operation and service (circulator replacement, control replacement, etc.)

The boiler is factory fire-tested and adjusted for proper combustion with natural gas supply pressure of 7” W.C. Typical gas pressure supply for natural gas is 7" W.C. (11" W.C. for propane). The gas train components are certified to handle a maximum inlet pressure of 14" W.C. (1/2 psig.). If the available gas pressure exceeds 14" W.C., a suitable additional intermediate gas pressure regulator of the "lock up" type must be provided to reduce the pressure to less than 14" W.C.

(not supplied)

Gas Piping

In the Commonwealth of Massachusetts, the gas cock must be a “T-handle type.”

Note: Install a sediment trap (drip leg) and a union connection ahead of the primary manual shutoff valve on the boiler. Gas piping should be installed in accordance with National Fuel Gas Code, ANSI Z223.1, latest edition, and any other local codes which may apply; in Canada see CAN/CGA-B.149.

Note: See Pipe Capacity for Natural Gas chart on the following page for required pipe size, based on overall length of pipe from meter plus equivalent length of all fittings. Approximate sizing may be based on 1 cubic foot of natural gas per 1,000 Btu per hour input, i.e., 500,000 Btu per hour requires about 500 cubic feet per hour. (See "Typical Boiler Operating Conditions," Section 4.3, for more information.)

Page 13