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WARNING:
This heater must be vented to the outdoors.
This heater must have proper air for combustion.
Death or injury could result if these instructions are not
Follow these instructions, local codes, or in the absence of
local codes the latest edition of The National Fuel Gas Code,
NFPA 54/ANSI Z223.1 in the USA or Natural Gas and Propane
Installation Code CSA B149.1 in Canada.
1. If the heater being installed is replacing existing equipment and
using the existing vent system from that equipment, inspect the
venting system for proper size and horizontal pitch by local/national
codes and these instructions. Determine that there is no blockage or
restriction, leakage, corrosion, and other deficiencies, which could
cause an unsafe condition.
2. Refer to the "OPERATION" section of this manual to verify existing
vent systems are adequate for the new heater. If the vent system is
not sized correctly carbon monoxide can leak into the building and
condensation can form that will cause damage to the vent system.
3. This heater can be installed with two different vent systems (refer to
the model number on the heater).
a. Power Vent: Exhaust outlet vent pipe (vent pipe) and using
room air for combustion.
b. Separated Combustion: Vent pipe and using the air inlet
pipe (inlet pipe) for combustion air from outside which
is recommended. Using outside air for combustion may
improve the life expectance of the heat exchanger.
4. The heater has a vent adapter for connecting the vent pipe and
separated combustion heaters have an inlet air pipe adapter for
connecting the inlet air pipe. See Figure 3 and Table 5. Use the
same size inlet pipe and vent pipe as the connector unless otherwise
specified by local/national codes.
5. Never use vent pipe or inlet pipe that is smaller than the adapters
on the heater.
6. Never block the air openings.
7. The heater can be vented vertically as a Category I appliance or
horizontally as a Category III appliance. A Category I appliance has
a negative pressure in the vent pipe. A Category III appliance has a
positive pressure in the vent pipe.
Vent and Air Connectors and Terminals
Model Size
100-200
250-400
8.
Single wall vent pipe must be 6" (15.2 cm) or greater from
combustible materials. Increase the distance from materials that
can be damaged by increased temperatures.
9.
Do not use PVC or plastic for any part of the vent pipe. Refer to
NFPA54/ANSI Z223.1 for appropriate material.
10. Attach the vent pipe and inlet pipe to the heater using 3
corrosion resistance #8 sheet metal screws.
1 1. Single wall vent pipe must not pass through any unoccupied attic,
inside wall, concealed space or floor.
12. When installing vent pipe through combustible walls (interior or
exterior) and floors, use listed thimbles.
followed.
TABLE 5
Vent/Inlet
Vent/Inlet
Connector
Terminals
4"
4" Listed Terminal
6"
6" Listed Terminal
Compact Unit Heater
13. Do not use vent dampers or any other restricting devices in any
portion of the vent pipe or inlet pipe.
14. All Heaters have a pressure switch. The pressure switch, along
with visual inspections, can determine if the vent system and
heat exchanger are blocked. Do not alter or remove the pressure
switch. If the pressure switch is not operational, contact a
qualified service person.
15. Do not vent into masonry chimneys.
16. Do not common vent with other appliances. The vent pipe and
inlet pipe system must not be attached to other appliances.
17. The flue products that exit the vent pipe are hot and contain
moisture. Protect exterior building surfaces and materials from
degradation due to heat and moisture. This includes vinyl siding.
18. See Table 6 on next page for vent pipe termination distances.
19. Do not terminate vent pipe above public walkways.
20. Inlet pipe can be any suitable material that will not sag, bend,
or warp and is airtight and smooth interior. The inside diameter
of the inlet pipe must be equal to or greater than the outside
diameter of the inlet pipe connector on the heater. Galvanized
single wall pipe of suitable thickness is recommended.
21. Inlet pipe connections should be airtight. This can be done with
any suitable material for the environment of the installation and
the pipe used. This includes duct tape, aluminum tape and caulk.
22. If you are installing the Separated Combustion air inlet pipe,
it must terminate in the same area and plane (vertical or
horizontal) as the vent pipe terminates. If the vent pipe terminates
vertically, the inlet pipe must be installed vertically. If the vent
pipe terminates horizontally, the inlet pipe must be installed
horizontally.
23. The inlet air pipe may need insulation to protect from
condensation that may form when cold outside air travels
through the pipe to the heater.
Vent Pipe Connector and Air Inlet Pipe Connector
7
Operating Instructions and Owner's Manual
FIGURE 3
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