HTP phoenix plus PHP199-119, Инструкция по установке, запуску и эксплуатации, Страница: 12 / 56

12
LP-454 REV. 1.6.15
Vents must be properly supported. Heater exhaust and intake connections are not designed to carry heavy weight. Vent support
brackets must be within 1’ of the heater and the balance at 4’ intervals. Heater must be readily accessible for visual inspection for the
first 3’ from the heater.
1. INDOOR DIRECT VENT INSTALLATION OF EXHAUST VENT AND INTAKE PIPE
If installing a direct vent option, combustion air must be drawn from the outdoors directly into the water heater intake, and exhaust vent
must terminate outside. There are three basic direct vent options detailed in this manual: 1. Side Wall Venting, 2. Roof Venting, and 3.
Unbalanced Venting.
Be sure to locate the heater such that the exhaust vent and intake piping can be routed through the building and properly terminated.
Different vent terminals can be used to simplify and eliminate multiple penetrations in the building structure (see Optional Equipment in
Venting Section). The exhaust vent and intake piping lengths, routing and termination methods must all comply with the methods and
limits given in the Venting section of this manual.
When installing a combustion air intake from outdoors, care must be taken to utilize uncontaminated combustion air.
To prevent
combustion air contamination, see Table 1
– Contaminant Table
.
2. INDOOR COMBUSTION AIR INSTALLATION IN CONFINED OR UNCONFINED SPACE
This heater requires fresh, uncontaminated air for safe operation and must be installed in a mechanical room where there is adequate
combustion and ventilating air.
NOTE: To prevent combustion air contamination, see Table 1
– Contaminant Table
.
Combustion air from the indoor space can be used if the space has adequate area or when air is provided through a duct or louver to
supply sufficient combustion air based on the water heater input.
Never obstruct the supply of combustion air to the water heater.
If the water heater is installed in areas where indoor air is contaminated (see Table 1) it is imperative that the water heater be installed
as direct vent so that all combustion air is taken directly from the outdoors into the water heater intake connection.
Unconfined space is space with volume greater than 50 cubic feet per 1,000 Btu/hour (4.8 cubic meters per kW) of the total input
rating of all fuel-burning appliances installed in that space. Rooms connected directly to this space, through openings not furnished with
doors, are considered part of the space.
Confined space is space with volume less than 50 cubic feet per 1,000 Btu/hour (4.8 cubic meters per kW) of the total input rating of
all fuel-burning appliances installed in that space. Rooms connected directly to this space, through openings not furnished with doors,
are considered part of the space.
When drawing combustion air from inside a conventionally constructed building to a confined space, such space should be provided
with two permanent openings: one located 6” (15 cm) below the space ceiling, the other 6” (15cm) above the space floor. Each opening
should have a free area of one square inch per 1,000 Btu/hr (22cm
2
/kW) of the total input of all appliances in the space, but not less
than 100 square inches (645cm
2
).
If the confined space is within a building of tight construction, air for combustion must be obtained from the outdoors as outlined in the
Venting section, Part 5 of this manual.
When drawing combustion air from the outside into the mechanical room, care must be taken to provide adequate freeze protection.
3. OUTDOOR INSTALLATION
This water heater is designed to draw combustion air through the louver system in the front of the heater cabinet. Before commissioning
or starting a heater installed outdoors, the end cap must be removed so that the heater draws combustion air through the louvers. This
combustion air also serves to cool the internal electronics when the heater is installed in very warm climates.
To prevent combustion air contamination or exhaust recirculation:

Ensure the heater is located away from the building. Flue gas can cause damage to exterior walls and other devices.

Locate the heater at least 48” below or horizontally from any window, door, walkway, or gravity air intake.

Locate the heater 10’ away from any public area, outdoor sitting area, or forced air inlet.

Locate the heater away from areas that may change over time. Do not allow the growth of trees, shrubs, or plants to obstruct
proper operation of the exhaust vent system.

If the heater is located in a fenced area, ensure the unit exhaust vent extends level with or above the top of the fence to
ensure flue gas does not get trapped and possibly recirculated into the louver system, which could contaminate the
combustion air.
See Venting section for additional details.