Trane Gas Unit Heaters Wartungshandbuch
Installation: Piping
18
GAND-SVX01B-EN
Pipe directly in to combination valve (see
5. A 1/8 in. N.P.T. plugged tapping, accessible for test
gauge connection, must be installed immediately
upstream of the gas supply connection to the
appliance.
upstream of the gas supply connection to the
appliance.
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
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.
adequately doped and tightened.
Note: Use pipe joint sealant resistant to the action of
liquefied petroleum gases regardless of gas
conducted.
conducted.
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).
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).
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).
Installation: Venting
Combustion Air Venting and Piping
NOTICE:
Overtightening!
Do not overtighten the inlet gas piping into the valve.
This may cause stresses that could crack the valve!
This may cause stresses that could crack the valve!
WARNING
Hazard of Explosion!
Never use an open flame to detect gas leaks. Explosive
conditions may occur. Use a leak test solution or other
approved methods for leak testing. Failure to follow
recommended safe leak test procedures could result in
death or serious injury or equipment or property-only-
damage.
conditions may occur. Use a leak test solution or other
approved methods for leak testing. Failure to follow
recommended safe leak test procedures could result in
death or serious injury or equipment or property-only-
damage.
Figure 10. Pipe installation, standard controls
D 3 6 31 C
Table 4.
Gas piping requirements
Gas Type
Natural Gas
Propane (LP) Gas
Single Stage Gas Piping Requirements
(a)
(a) 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)
Two Stage Gas Piping Requirements
(b)
(b) For two stage applications only, at normal altitudes.
Supply Inlet Pressure 6.5 in. wc Min.
11.5 in. wc Min.
(1.6 kPa)
(2.9 kPa)
WARNING
Exhaust Fumes!
Each unit heater MUST have its own combustion air
system and MUST NOT be connected to other air intake
systems. To prevent exhaust fumes from being pulled
into the air intake system or improper heating, ensure
that the unit heater has its own combustion air system
and is not connected to other air intake systems.
Failure to follow these recommendations could result in
death or serious injury or equipment damage.
system and MUST NOT be connected to other air intake
systems. To prevent exhaust fumes from being pulled
into the air intake system or improper heating, ensure
that the unit heater has its own combustion air system
and is not connected to other air intake systems.
Failure to follow these recommendations could result in
death or serious injury or equipment damage.
WARNING
Carbon Monoxide!
Your venting system must not be blocked by any snow,
snow drifts, or any foreign matter. Inspect your venting
system to ensure adequate ventilation exists at all
times! A blocked venting system could result in carbon
monoxide poisoning. Symptoms of such condition
include grogginess, lethargy, inappropriate tiredness, or
flu-like symptoms. Failure to follow these
recommendations could result in death or serious
injury.
snow drifts, or any foreign matter. Inspect your venting
system to ensure adequate ventilation exists at all
times! A blocked venting system could result in carbon
monoxide poisoning. Symptoms of such condition
include grogginess, lethargy, inappropriate tiredness, or
flu-like symptoms. Failure to follow these
recommendations could result in death or serious
injury.