Greenheck DGX Installation, Operation And Maintenance Manual page 10

All gas piping must be installed in accordance with the latest edition of the National Fuel Gas Code
ANSI/Z223.1 and any local codes that may apply. In Canada, the equipment shall be installed in
accordance with the Installation Code for Gas Burning Appliances and Equipment (CGA B149) and
Provincial Regulations for the class. Authorities having jurisdiction should be consulted before
All components of this or any other gas fired heating unit must be leak tested prior to placing the unit
into operation. A soap and water solution should be used to perform this test. NEVER test for gas
WARNING!
If pressure testing in excess of 1/2 psig (3.5
kPa), the heater and manual shutoff valve must
be disconnected from the supply gas line.
IMPORTANT!
All piping should be clean and free of any foreign
matter. Foreign material entering the gas train
can damage the valves, regulators and burner.
Step 1 Determine the Supply Gas Requirements
The unit's direct gas nameplate states the requirements for the gas being supplied to the unit. See figure #22.
The direct gas nameplate is located on the outside of the unit on the control center side.
Minimum and
maximum gas
pressures
Type of Gas
Installation - Direct Gas Piping
IMPORTANT!
installations are made.
WARNING!
leaks with an open flame.
MAX BTU/HR
BTU/H MAX
NORMAL MANIFOLD
PRESSURE
PRESSION D'ADMISSION
NORMALE
MIN GAS
PRESSURE
PRESSION DE GAZ
MIN BURNER
PRESSURE DROP
PERTE MIN DE PRESSION
DANS LE BRULEUR
TYPE OF GAS
NATURE DU GAZ
EQUIPPED FOR
SCFM
CONCU POUR
Figure 22. Direct Gas Nameplate
If pressure testing at or below 1/2 psig (3.5 kPa),
the heater must be isolated from the supply gas
line by closing its manual shutoff valve.
Do NOT connect the unit to gas types other than
what is specified and do NOT connect the unit to
gas pressures that are outside of the pressure
range shown on the label.
MIN BTU/HR
BTU/H MIN
MIN GAS PRESSURE
FOR MAX OUTPUT
"W.C.
PRESSION DE GAZ MIN
POUR PUISSANCE MAX
MAX GAS
PRESSURE
"W.C.
PRESSION DE GAZ
MAX
MAX BURNER
PRESSURE DROP
"W.C.
PERTE MAX DE PRESSION
DANS LE BRULEUR
DESIGN ∆T
∆T NORMALE
AGAINST EXTERNAL STATIC PRESSURE
"W.C.
CONTE PRESSION STATIQUE EXTERIEURE
10
WARNING!
IMPORTANT!
Minimum gas
pressure for
maximum output
"W.C.
"W.C.
PSI
F