16
Operations
Gas Codes
Confer with local gas company and with proper
municipal officials regarding any specific code or regu-
lations governing the installation. The installation must
conform to local codes (NFPA 54).
Gas Piping
This machine shall be rigidly connected to the gas
piping outlet and equipped with external manual shut-
off valves adjacent to such machine. All gas piping shall
be approved and installed in accordance with the
Uniform Mechanical Code.
Install a gas union in the gas line adjacent to and
upstream from the control manifold and downstream
from the manual main shut-off valve. A 1/8" NPT
plugged tapping accessible for test gauge connection
shall be installed immediately upstream of the gas
supply connection for the purpose of determining the
gas supply pressure to the burner, and to prevent
damage to gas valve.
If a manual gas shut off valve is not in the gas supply
line within six feet of the machine and in an accessible
location, one shall be installed.
Union Location
Union Connection
The following pipe sizes are just recommendations.
Always consult a local plumber and venting contractor
for local codes and regulations during installation.
Pipe Sizing Chart for Natural Gas
The following chart is based on gas pressure in the
range 0-0.5 psi, specific gravity of 0.6 and pressure
loss of 0.5" W.C. Numbers are for straight schedule 40
pipe; fittings further reduce capacity. For example, in 1"
size, an elbow is equivalent to about 2.6 feet of pipe
and a tee is equivalent to about 5.2 feet of pipe.
Maximum capacity of pipe in cubic feet/hr of natural gas
(Multiply values by 1000 to get nominal BTU/hr
capacity).
LP-Gas (Liquid Petroleum Gas or Propane)
LP-gas is gas compressed into liquid form for easy
transportation and storage. It is also known as propane
or bottle gas.
(Propane tanks are not supplied with this equipment.)
LP-gas is flammable, is always contained under
pressure and the liquid can freeze skin. Therefore, in
the interest of safety, it is important to understand the
basic facts about LP-gas and LP-gas containers.
Federal DOT (Department of Transportation) regula-
tions require periodic inspections and re-qualifications
of cylinders. DO NOT USE damaged or rusted
containers.
DO NOT store LP-gas containers indoors or in
enclosed areas. Do not expose LP-gas container to
heat. Always store with service valve closed and
plugged as required.
CAUTION: Use LP-gas containers in proper
position.
ATTENTION: Utiliser des contenants de gaz de
pétrole liquéfié en position appropriée.
Most LP-gas pressure washer heaters are designed to
operate on LP-gas vapor only. Therefore, all LP-gas
containers designed for vapor service must be trans-
ported, installed and used in the proper position. Do not
transport, install or use a vertical cylinder in a horizontal
or upside down position. Proper care must be taken to
position a horizontal container in the correct position for
vapor withdrawal. Liquid LP-gas could enter the system
designed for vapor only, possibly creating a hazardous
condition.
Always use a POL plug installed on a POL valve or a
dust cap on an ACME/Type 1 valve when transporting
or storing disconnected containers (full or empty).
Check for leaks after connecting. Apply approved leak
detector solution to connection, turn off all burners and
pilots and open service valve. Leaks will be detected by
the growth of bubbles. If bubbles grow, tighten or repair
the connection as needed. Repeat leak test until
problem is corrected.
Check all tank and the line connections periodically to
be sure they are tight. When testing for leaks, use
approved leak detector solution — not matches.
MANUAL, OPERATOR, HOTSY, STAT ELEC NG-LP 9.808-037.0-A
Manual
Shut-Off
Valve
1/8" NPT Plugged Pressure Gauge
Port Location
Union
Drop
Floor Level
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