Sterling QVEF User Manual download pdf (Page 10)

VENTING FOR POWER VENTED (CATEGORY III) UNIT HEATERS

The venting system for these appliances shall terminate

at least four feet (1.2m) below, four feet (1.2m) horizontal

from, or one foot (0.3m) above any door, window, or

gravity air inlet into any building.

Through the wall vents for these appliances shall NOT

terminate over public walkways, or over an area where

condensate or vapor could create a nuisance or hazard

or could be detrimental to the operation of regulators,

relief valves, or other equipment.

The vent pipe equivalent length must be 5 ft. (1.5m)

minimum and must not exceed 50 ft. (15.2m). Equivalent

length is the total length of straight sections PLUS 15 ft.

(4.6m) for each 90 degree elbow, 8 ft. (2.4m) for each 45

degree elbow, and 10 ft. (3.0m) for the vent cap.

Maintain 6 in. (152mm) between vent pipe and combus-

tible materials. A minimum of 12 in. (305mm) of straight

pipe is required from the venter outlet before installing

an elbow in the vent system. An elbow should never

be attached directly to the venter!

Figure 6 - Horizontal Left Vent Position

(Rear View of Unit Heater)

Figure 7 - Horizontal Right Vent Position

(Rear View of Unit Heater)

Figure 8 - Vertical Vent Position

(Side View of Unit Heater)

All unit heaters must be vented! All venting installations

shall be in accordance with the latest edition of Part 7,

venting of Equipment of the National Fuel Gas Code,

ANSI Z223.1, or applicable provisions of local building

codes for natural or power vented units.

Power vented units are designed to be used with

single wall vent pipe utilizing horizontal or vertical

venting arrangements (see Figures 6, 7 and 8). These

arrangements may terminate external to the building

using either a single wall or double wall (Type B) vent.

See Figures 6 thru 10 for special installation requirements

regarding these venting conditions.

CARBON MONOXIDE!

Your venting system must not be blocked by

any snow, snow drifts, or any foreign matter.

Inspect your venting system to ensure adequate

ventilation exists at all times! Failure to heed

these warnings could result in Carbon Monoxide

Poisoning (symptoms include grogginess,

lethargy, inappropriate tiredness, or flu-like

symptoms).

Do not use a type B (double wall)

vent internally within the building on our power

vented units!

If double wall venting is used, components which

are UL Listed and approved for Category III positive

pressure venting systems MUST be used.

A Briedart Type L, Field Starkap or an equivalent

vent cap must be supplied by the customer for each

power vented unit. The vent pipe diameter MUST be as

speciﬁ ed in Table 1 (“D” Dia. Flue Opening). A reducer

must be field installed for 100 through 175 MBH Unit

Sizes. All 300 through 400 MBH Unit sizes are factory

equipped with the required flue increaser. Refer to

Figures 9 through 10D for additional requirements.

Vent Systems - Termination Clearance Requirements*

Minimum Clearances for

Structure Termination Locations

4 feet below

Door, window or any gravity air inlet 4 feet horizontally

1 foot above

Forced air inlet within 10 ft. 3 feet above

Adjoining building or parapet 6 feet

Adjacent public walkways 7 feet above grade

* If the vent terminal is to be installed near ground level, the vent

terminal must be positioned at least twelve inches above the maximum

anticipated snow depth (see page 11 for Canadian requirements).

Tee With Drip Leg &

Cleanout Cap At Lowest

Point Of Vent System (Typ.)

D4072

To Horizontal Flue

Vent Termination

Reducer/Increaser

Where Applicable

Power Venter

Tee With Drip Leg &

Cleanout Cap At Lowest

Point Of Vent System (Typ.)

D4073

To Horizontal Flue

Vent Termination

Reducer/Increaser

Where Applicable

D4071

AIR FLOW

Power Venter

Tee With

Drip Leg &

Cleanout Cap

To Vertical Flue

Vent Termination

Reducer/Increaser

Where Applicable

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 27 28

Comments to this Manuals

No comments

Sterling QVEF User Manual Page 10

Comments to this Manuals

Related products and manuals for Radiators Sterling QVEF