Unitary products group WHOLE HOUSE DEHUMIDIFIER Spezifikationen PDF herunterladen (Seite 7)

035-17477-002 Rev. D (1202)

Unitary Products Group 7

DUCTWORK

The duct system's design and installation must:

1. Handle an air volume appropriate for the served space

and within the operating parameters of the furnace spec-

ifications.

2. Be installed in accordance with standards of NFPA

(National Fire Protection Association) as outlined in

NFPA pamphlets 90A and 90B (latest editions) or appli-

cable national, provincial, local fire and safety codes.

3. Create a closed duct system. The supply duct system

must be connected to the furnace outlet and the return

duct system must be connected to the furnace inlet. Both

supply and return duct systems must terminate outside

the space containing the furnace.

4. Complete a path for heated or cooled air to circulate

through the air conditioning and heating equipment and

to and from the conditioned space.

When the furnace is used in conjunction with a cooling coil,

the coil must be installed parallel with, or in the supply air side

of the furnace to avoid condensation in the primary heat

exchanger.

When a parallel flow arrangement is used, the dampers or

other means used to control air flow must be adequate to pre-

vent chilled air from entering the furnace, and if manually

operated, must be equipped with means to prevent operating

of either unit unless the damper is in the full heat or cool posi-

tion.

UPFLOW MODELS

SUPPLY PLENUM CONNECTION

Attach the supply plenum to the fur-

nace outlet duct connection flanges.

This is typically through the use of S

cleat material when a metal plenum is

used. The use of an approved flexible

duct connector is recommended on all

installations. This connection should be

sealed to prevent air leakage.

If a matching cooling coil is used, it

may be placed directly on the furnace

outlet and sealed to prevent leakage.

Follow the coil instructions for installing

the supply plenum.

On all installations without a coil, a removable access panel

is recommended in the outlet duct such that smoke or

reflected light would be observable inside the casing to indi-

cate the presence of leaks in the heat exchanger. This

access cover shall be attached in such a manner as to pre-

vent leaks.

RET UR N DUCT C ONN ECT ION

Return air may enter the furnace through the side(s) or bot-

tom depending on the type of application. Return air may

not be connected into the rear panel of the unit. Refer to

the "Filter Installation" section of this instruction for the type of

application desired for specific installation details.

NOTE: In order to achieve the airflow indicated in the table, it

is recommended those applications over 1800 CFM use

return air from two sides, one side and the bottom or bottom

only. For single return application, see data and notes on

blower performance data tables in this manual.

Tabl e 3:

UNIT CLEARANCES TO COMBUSTIBLES

APPLICATION TOP FRONT REAR

LEFT

SIDE

RI GH T

SIDE

FLUE

FLOOR/

BO TTOM

CLO SET A LCOVE ATTI C

LINE

CON-

TA CT

UPFLOW MODELS (P*UR / G9T-UP / FG9-UP)

UPFLOW 1 3 0 0 0 0 COMBUSTI BLE YES YES YES NO

DOWNFLOW / HORIZONTAL MODELS (P*DH / G9T-DH / FG9-DH )

DOWNFLOW130000

Y ES YES YE S NO

HORIZONTAL 1 3 0

†

0 1” NO YES YE S

YES

‡

Special floor base or air conditioning coil required for use on combustible floor.

†.

Minimum of 8” clearance required to install condensate removal system.

‡.

Line contact only permit ted between lines f ormed b y th e intersection of the re ar panel and side pan el (top in horizont al posit ion) of

the furnace jacket and building joists, studs or framing.

The cooling coil must be installed in the supply air

duct downstream of the furnace. Cooled air must

not be passed over the heat exchanger.

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