Bryant 355CAV Electrostatic Discharge ESD Precautions, Introduction, Applications

SThe use of copper tubing for gas piping is not approved by the state of Massachusetts.

Electrical Connections

SUS: National Electrical Code (NEC) ANSI/NFPA 70-2005.

SCANADA: Canadian Electrical Code CSA C22.1.

ELECTROSTATIC DISCHARGE (ESD)

PRECAUTIONS

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in damage to unit components.

Electrostatic discharge can affect electronic components. Take precautions during furnace installation and servicing 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.

3.Disconnect all power to the furnace. Multiple disconnects may be required. DO NOT TOUCH THE CONTROL OR ANY WIRE CONNECTED TO THE CONTROL PRIOR

TO DISCHARGING YOUR BODY’S ELECTROSTATIC CHARGE TO GROUND.

4.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.

5.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 ungrounded objects, etc.).

6.If you touch ungrounded objects (recharge your body with static electricity), firmly touch furnace again before touching control or wires.

7.Use this procedure for installed and uninstalled (ungrounded) furnaces.

8.Before removing a new control from its container, discharge 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.

9.An ESD service kit (available from commercial sources) may also be used to prevent ESD damage.

INTRODUCTION

The model 355CAV Direct Vent, Upflow, Gas-Fired, Category IV, condensing furnace is available in model sizes ranging in input capacities of 60,000 to 120,000 Btuh.

APPLICATIONS

General

Some assembly and modifications are required for furnaces installed in any of the four applications shown in Fig. 1. All

drain and pressure tubes are connected as shown in Fig. 7. See appropriate application instructions for these procedures.

!CAUTION

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in property damage.

Local codes may require a drain pan under entire furnace and condensate trap when a condensing furnace is used in an attic application or over a finished ceiling.

NOTE: In Canada, installations shall be in accordance with current CAN/CSA-B149.1-05 and/or local codes.

UPFLOW APPLICATION

An upflow furnace application is where furnace blower is located below combustion and controls section of furnace, and conditioned air is discharged upwards.

Condensate Trap (Factory-Shipped Orientation)

The condensate trap is factory installed in the blower shelf and factory connected for UPFLOW applications. A factory-supplied tube is used to extend the condensate trap drain connection to the desired furnace side for field drain attachment. See Condensate Trap Tubing section for drain tube extension details. (See Fig. 6.)

Condensate Trap Tubing (Factory-Shipped Orientation)

NOTE: See Fig. 7 or tube routing label on main furnace door to confirm location of these tubes.

1.Collector Box Drain, Inducer Housing Drain, Relief Port, and Pressure Switch Tubes.

These tubes should be factory attached to condensate trap and pressure switch ready for use in UPFLOW applications. These tubes can be identified by their connection location and also by a color label on each tube. These tubes are identifed as follows: collector box drain tube (blue label), inducer housing drain tube (violet label or molded), relief port tube (green label), and pressure switch tube (pink label).

2.Condensate Trap Drain Tube

The condensate trap drain connection must be extended for field attachment by doing the following:

f.Determine location of field drain connection. (See Fig. 2 or 7.)

NOTE: If internal filter or side filter/media cabinet is used, drain tube should be located to opposite side of casing from return duct attachment to assist in filter removal.

g.Remove and discard casing drain hole plug button from desired side.

h.Install drain tube coupling grommet (factory-supplied in loose parts bag) in selected casing hole.

i.Slide drain tube coupling (factory-supplied in loose parts bag) through grommet so long end of coupling faces blower.

j.Cement 2 factory-supplied 1/2-in. (12.7mm) street CPVC elbows to rigid drain tube connection on condensate trap. (See Fig. 7.) These elbows must be cemented together and cemented to condensate trap drain connection.

355CAV

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