6
Specifications
Approval & Codes
This appliance is certi
fi
ed to ANSI Z21.88/CSA 2.33
American National Standard / CSA Standard for Vented
Gas Fireplace Heaters for use in Canada and USA, and
to CGA 2.17-91 High Altitude Standard in Canada. This
appliance is for direct vent installations.
This appliance complies with CSA P.4.1-15 Testing
method for measuring annual
fi
replace e
ffi
ciencies.
The installation must conform to local codes or, in
the absence of local codes, with the National Fuel
Gas Code, ANSI Z223.1/NFPA 54 or the Natural Gas
and Propane Installation Code CAN/CGA-B149.1. Only
quali
fi
ed licensed or trained personnel should install
this appliance.
This appliance must be electrically grounded in
accordance with local codes, or, in the absence of local
codes, with the National Electrical Code, ANSI/NFPA 70
or the Canadian Electrical Code, CSA C22.1.
Ratings
*High Altitude Installations
Input ratings are shown in BTU per hour and are
certi
fi
ed without deration for elevations up to 4,500
feet (1,370 m) above sea level.
For elevations above 4,500 feet (1,370 m) in USA,
installations must be in accordance with the current
ANSI Z223.1 and/or local codes having jurisdiction.
Heating value of gas in some areas is reduced to
compensate for elevation—consult your local gas utility
to con
fi
rm.
For installations at elevations above 4,500 feet (1,370 m)
in Canada, please consult provincial and/or local
authorities having jurisdiction.
Model
785YN
785YP
Gas
Natural
Propane
Altitude (Ft.)*
0-4,500 feet*
Input Maximum (Btu/h)
28,000
26,000
Input Minimum (Btu/h)
15,000
13,000
Manifold Pressure (in w.c.)
3.2”
9.5”
Minimum Supply Pressure (in w.c.)
5”
11”
Maximum Supply Pressure (in w.c.)
10”
14”
Main Burner Injector Marking
850
300
Pilot Injector Marking
51
30
Min. Rate By-Pass Screw
190
125
Supply Gas
Heater engine 785YN is used with natural gas.
Heater engine 785YP is used with propane gas.
The supply pressure must be between the limits shown
in the Ratings section.
The supply connection is 1/2” NPT female and located
on the left side of the control valve. The gas line entry
point is on the the upper left hand side of the
fi
replace.
See
Gas Supply
pages 17–19 for connection details.
Electrical
The 785 G4 is designed to run on battery power and
does not require an electrical source to operate as a
heater. However, if the appliance is
fi
tted with a fan, a
grounded power source is required.
Conversion Kits
The 785 is supplied as natural gas or propane gas and
is
fi
eld convertible between fuels. See instructions
packaged with the conversion kits for further
information.
Floor/Hearth
This appliance is approved for installation into existing
solid-fuel burning
fi
replaces only. Combustible material
such as plywood and so on may be used for leveling
and shimming beneath the unit. This appliance does
not require a hearth other than to support the weight
of certain fronts.
X
X
Note:
This appliance is designed and approved as
a supplemental heater and provides the potential
for most energy conservation when used while
attended. The use of an alternate primary heat
source is advisable.