Nordyne M3RL GAS Supply and Piping, Furnace with Condensate Drain Trap Assembly

Collector	A
Box
			Clamp
			Step 1:	Loosen
Burner			Step 2: Rotate to drain direction
			Step 3:	Retighten
Box
“Hard”			Keep
			Downward
J Drain Tube
			Slope
Floor
Alt. Drain	Alt. Drain	Alt. Drain	Alt. Drain

Figure 21. Furnace with Condensate Drain Trap Assembly

1.Remove the collector box soft tube at location A in Figure 21 and insure the exit from the collector box is clear of any debris or obstructions.

2.Replace this tube and insure the fit to the header spout is air tight. Air will be drawn into the header if this connection is not tight.

3.Check other tube connections along the drain system. Insure that all are air tight.

NOTE: Industry research studies indicate that when condensate is routed to an active drain, household detergents, etc., buffer its acidity. If the drain is not actively used or if codes require, obtain a neutralizer kit (See Table 12). Proper drains and connections to the condensate tub- ing are required as NORDYNE cannot be held responsible for water leakage which occurs due to loose hose connections or improperly sealed drain line pipes.

GAS SUPPLY AND PIPING

General

This furnace is equipped for bottom, left, or right side gas entry. Typical gas service hook- ups are shown in Figure 22. When making the gas connection provide clearance between the gas supply line and the entry hole in the furnace casing to avoid unwanted noise and/or damage to the furnace.

All gas piping must be installed in compliance with local codes and utility regulations. Some localregulationsrequiretheinstallationofamanual main shut-off valve and ground joint union exter- nal to the furnace. The shut-off valve should be

readily accessible for service and/or emer- gency use. Consult the local utility or gas supplier for additional requirements regarding placement of the manual main gas shut-off. In the absence of local codes, the gas line instal- lation must comply with the provisions stated in the Federal Manufactured Home Standard (H.U.D Title 24, part 280) and the National Fuel Gas Code (ANSI Z223.1/NFPA-54) or (CAN/ CGA B149) installation codes.

A drip leg should be installed in the vertical pipe run to the unit. Table 7 lists gas flow capacities for standard pipe sizes as a function of length in typical applications based on nominal pres- sure drop in the line.

NOTE: Gas piping must not be run in or through air ducts, gas vents, etc.

Compounds used on threaded joints of gas piping must be resistant to the actions of lique- fied petroleum gases.

!CAUTION:

Do not use matches, lighters, candles, or other sources of open flame to check for gas leaks.

NOTE: When pressure testing gas supply lines at pressures greater than 1/2 psig (14 in. water column), the furnace must be discon- nected from the gas supply piping system to prevent damage to the gas control valve.

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