2
CLEARANCES
Space required: 3 ft. x 7 ft. See page 9.
Minimum and service clearances: See page 11 for
clearances table. Note that local code prevails.
COMBUSTION AIR
Air filter location: See page 11.
Ducting materials: PVC, CPVC, or sealed single-wall
galvanized ducting,see page 12 for details.
PIPING
Piping options: Primary/secondary piping. Note that
the heater should be located so that any water leaks
will not cause damage to the adjacent area.
Pressure relief valve: See page 14 for recommended
PRV orientation.
Flow rates: See page 15 for flow values table.
Primary/secondary piping: See pages 16-20 for
recommended configurations (including single heater
and cascades).
Tanks: All heaters should be equipped with a
properly-sized expansion tank and air separator
fitted at the highest point in the system.
GAS
Distance to regulator (pipe lengths) and gas inlet
sizes: See page 21.
Required pressure for natural gas:
Min. = 4" WC, Max. = 10.5" WC
Required pressure for propane:
Min. = 4" WC, Max. = 13" WC
Sediment trap is required for all installations.
POWER
Supply voltage: See page 23 for input voltage table.
VENTING - CAT IV
Materials: PVC, CPVC, Polypropylene, stainless
steel, see pages 28-30.
Venting diagrams:
For stainless steel and polypro, see pages 32-35.
For PVC/CPVC, see pages 35-38.
Outdoor venting:
Outdoor Vent Kit (see page 38).
CONTROLS INTERFACE
User interface:
VIEW menu is the default menu, see page 48.
To change settings, use the SETUP/ADJUST menu,
see page 50.
Wiring diagram: See page 54.
OPERATION
Heater Status Light: See page 60.
QUICK START GUIDE FOR TYPE H
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