Gas Heat Units (Sfh_) - Trane IntelliPak SAHL Series Installation, Operation And Maintenance Manual

Gas Heat Units (SFH_)

All internal gas piping is factory-installed and pressure leak-tested before shipment. Once the unit
is set into place, the gas supply line must be field-connected to the elbow located inside the gas
heat control compartments.
Hazardous Gases and Flammable Vapors!
Exposure to hazardous gases from fuel substances have been shown to cause cancer, birth
defects or other reproductive harm. Improper installation, adjustment, alteration, service or
use of this product could cause flammable mixtures. To avoid hazardous gases and flammable
vapors follow proper installation and set up of this product and all warnings as provided in this
manual. Failure to follow all instructions could result in death or serious injury.
When using dry nitrogen cylinders for pressurizing units for leak testing, always provide a
pressure regulator on the cylinder to prevent excessively high unit pressures. Never pressurize
unit above the maximum recommended unit test pressure as specified in applicable unit
literature. Failure to properly regulate pressure could result in a violent explosion, which could
result in death or serious injury or equipment or property-only-damage.
Access holes are provided on the unit as illustrated in
bottom pipe entry on 20 through 89 Ton units and in
the guidelines listed below will enhance both the installation and operation of the furnace.
Note: In the absence of local codes, the installation must conform with the American National
1. To assure sufficient gas pressure at the unit, use
2. If a gas line already exist, verify that it is sized large enough to handle the additional furnace
3. Take all branch piping from any main gas line from the top at 90 degrees or at 45 degrees to
4. Ensure that all piping connections are adequately coated with joint sealant and properly
5. Provide a drip leg near the unit.
6. Install a pressure regulator at the unit that is adequate to maintain 7" w.c. for natural gas while
Note: Gas pressure in excess of 14" w.c. or 0.5 psig will damage the gas train.
Failure to use a pressure regulating device will result in incorrect gas pressure. This can cause
erratic operation due to gas pressure fluctuations as well as damage the gas valve.
Over sizing the regulator will cause irregular pulsating flame patterns, burner rumble, potential
flame outages, and possible gas valve damage.
If a single pressure regulator serves more than one rooftop unit, it must be sized to ensure that the
inlet gas pressure does not fall below 7" w.c. with all the furnaces operating at full capacity. The
gas pressure must not exceed 14" w.c. when the furnaces are off.
7. Provide adequate support for all field installed gas piping to avoid stressing the gas train and
8. Leak test the gas supply line using a soap-and-water solution or equivalent before connecting
9. Check the supply pressure before connecting it to the unit to prevent possible gas valve damage
RT-SVX36G-EN
Standard Z223-1a of the National Fuel Gas Code, (latest edition).
appropriate gas pipe size for the unit heating capacity listed on the unit's nameplate.
capacity before connecting to it.
prevent moisture from being drawn in with the gas.
tightened. Use a piping compound that is resistant to liquid petroleum gases.
the furnace is operating at full capacity.
controls.
it to the gas train.
and the unsafe operating conditions that will result.
WARNING
Figure 10, p. 36
Figure 12, p. 40 on 90-130 Ton units. Following
Table 16 as a guide to determine the
Installation
to accommodate a side or
57