Johnson-controls AFFINITY 340968-XIM-A-0108 User Manual download pdf (Page 9)

340968-XIM-A-0108

Johnson Controls Unitary Products 9

4. All piping should be cleaned of dirt and scale by ham-

mering on the outside of the pipe and blowing out the

loose dirt and scale. Before initial start-up, be sure that

all of the gas lines external to the unit have been purged

of air.

5. The gas supply should be a separate line and installed in

accordance with all safety codes as prescribed under

Limitations. After the gas connections have been com-

pleted, open the main shut-off valve admitting normal

gas pressure to the mains. Check all joints for leaks with

soap solution or other material suitable for the purpose.

NEVER USE A FLAME.

6. The furnace and its individual manual shut-off valve must

be disconnected from the gas supply piping system dur-

ing any pressure testing of that system at test pressures

in excess of 1/2 psig (3.48 kPa).

The furnace must be isolated from the gas supply piping sys-

tem by closing its individual manual shut-off valve during any

pressure testing of the gas supply piping system at test pres-

sures equal to or less than 1/2 psig (3.48 kPa).

FLUE VENT HOOD

The flue vent hood with screen is not shipped attached. This

hood must be installed to assure proper unit operation. The

hood must be fastened to the outside of the side gas control/

electrical compartment with the screws provided in the bag

attached to the inside of the gas control/electrical compart-

ment, see Figure 6.

If flexible stainless steel tubing is allowed by the

authority having jurisdiction, wrought iron or steel

pipe must be installed at the gas valve and extend

a minimum of two (2) inches outside of the unit

casing.

Natural gas may contain some propane. Propane

being a excellent solvent, will quickly dissolve

white lead or most standard commercial com-

pounds. Therefore, a special pipe dope must be

applied when wrought iron or steel pipe is used.

Shellac base compounds such as gaskoloc or sta-

lastic, and compounds such as rectorseal # 5,

Clyde’s or John Crane may be used.

Flue hood surfaces may be hot.

FIGURE 6 - FLUE VENT OUTLET AIR HOOD

The flue exhaust hood must be properly installed

and within the recommended clearances. Further

communications and action must be given to the

home or building owner(s) to eliminate any unau-

thorized human contact around this area during

the heating cycle. Flue hood surface and immedi-

ate area are designed to operate at high tempera-

tures during the heating cycle.

V E N T O U T L E T S C R E E N

F L U E V E N T O U T L E T

A I R H O O D

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