Bryant 355MAV User Manual download pdf (Page 2)

Untrained personnel can perform basic maintenance functions

described in User’s Information Manual such as cleaning and

replacing air filters. All other operations must be performed by

trained service personnel. When working on heating equipment,

observe precautions in the literature, on tags, and on labels

attached to or shipped with the unit and other safety precautions

that may apply.

CAUTION: CUT HAZARD

Failure to follow this caution may result in personal

injury.

Be careful of sharp metal edges, etc. Use care and wear

protective clothing, gloves, and safety glasses when

removing parts.

Follow all safety codes including the National Fuel Gas Code

(NFGC) NFPA 54-2002/ANSI Z223.1-2002 in the USA, CSA

B149.1-00 National Standard of Canada, Natural Gas and Propane

Installation Codes (NSCNGPIC) in Canada, and the Installation

Standards, Warm Air Heating and Air Conditioning Systems

(NFPA 90B) ANSI/NFPA 90B. Wear safety glasses and work

gloves. Have a fire extinguisher available during start-up and

adjustment procedures and service calls.

GENERAL

These instructions are written as if the furnace is installed in an

upflow application. An upflow furnace application is where the

blower is located below the combustion and controls section of the

furnace, and conditioned air is discharged upward. Since this

furnace can be installed in any of the 4 positions shown in Fig. 2,

you must revise your orientation to component location accord-

ingly.

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

CAUTION: UNIT DAMAGE HAZARD

Failure to follow this caution may damage furnace

components.

Electrostatic discharge can affect electronic components.

Take precautions during furnace installation and servic-

ing to protect the furnace electronic control. Precautions

will prevent electrostatic discharges from personnel and

hand tools which are held during the procedure. These

precautions will help to avoid exposing the control to

electrostatic discharge by putting the furnace, the control,

and the person at the same electrostatic potential.

1. Disconnect all power to the furnace. DO NOT TOUCH

THE CONTROL OR ANY WIRE CONNECTED TO THE

CONTROL PRIOR TO DISCHARGING YOUR BODY’S

ELECTROSTATIC CHARGE TO GROUND.

2. Firmly touch a clean, unpainted, metal surface of the

furnace chassis which is close to the control. Tools held in

a person’s hand during grounding will be satisfactorily

discharged.

3. After touching the chassis, you may proceed to service the

control or connecting wires as long as you do nothing that

recharges your body with static electricity (for example; DO

NOT move or shuffle your feet, DO NOT touch un-

grounded objects, etc.).

4. If you touch ungrounded objects (recharge your body with

static electricity), firmly touch furnace again before touch-

ing control or wires.

5. Use this procedure for installed and uninstalled (un-

grounded) furnaces.

6. Before removing a new control from its container, dis-

charge your body’s electrostatic charge to ground to protect

the control from damage. If the control is to be installed in

a furnace, follow items 1 through 5 before bringing the

control or yourself into contact with the furnace. Put all

used AND new controls into containers before touching

ungrounded objects.

Fig. 1—Multipoise Furnace in Upflow Orientation

A98308

EFFICIENCY

RATING

CERTIFIED

REGISTERED

ISO 9001:2000

Fig. 2—Multipoise Orientation

A93041

UPFLOW

DOWNFLOW

HORIZONTAL

LEFT

AIRFLOW

HORIZONTAL

RIGHT

—2—

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Bryant 355MAV User Manual Page 2

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