Trane Gas Unit Heaters Wartungshandbuch

GTND-SVX01B-EN

23 

Pipe directly in to combination valve (see 

5. Gas valve has a pressure test post requiring a 3/32” hex 

head wrench to read gas supply and manifold 
pressures. Open 1/4 turn counterclockwise to read, 
turn clockwise to close and reseat. A 5/16” ID hose fits 
the pressure post.

6. Provide a drip leg in the gas piping near the gas unit 

heater. A ground joint union and a manual gas shutoff 
valve should be installed ahead of the unit heater 
controls to permit servicing. The manual main shutoff 
valve must be located external to the jacket (see 

7.

Make certain that all connections have been 
adequately doped and tightened.

The appliance and its individual shutoff valve must be 
disconnected from the gas supply piping system during 
any pressure testing of that system at test pressures in 
excess of 1/2 psig (3.5 kPa).

The appliance must be isolated from the gas supply piping 
system by closing its individual manual shutoff valve 
during any pressure testing of the gas supply piping 
system at test pressures equal to or less than 1/2 psig 
(3.5 kPa).

ANSI now organizes vented appliances into four 
categories.

D 3 6 31 C 

(a) For single stage applications only, at altitudes below 2,001 feet.

(b) For single stage applications only, at normal altitudes

Manifold Pressure

3.5 in. wc

10.0 in. wc

(0.9 kPa)

(2.5 kPa)

Supply Inlet Pressure 14.0 in. wc Max.

14.0 in. wc Max.

(3.5 kPa)

(3.5 kPa)

5.0 in wc Min.

11.0 in wc Min.

(1.2 kPa)

(2.7 kPa)