Bryant 394U User Manual

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The Bryant Model 394 forced air, gas-fired furnace
may be installed as an:
1. Upflow Furnace
2. Counter-Fiow Furnace
3. Basement Furnace
This instruction contains complete procedures for
installing the unit as an Upflow Furnace.
When the furnace is used as a counter-flow, a
counter-flow box and instructions are available.
When it is used as a basement model, a drop duct
and instructions are available. Series C and D 393
Counterflow boxes are not interchangeable with the
304 Counterflow boxes.
Before beginning. installation, read these instruc-
tions carefully.
When making a Counter-Flow or Basement installa-
tion, also read the separate instructions furnished
with the additional equipment required.
Install the furnace in accordance with the require-
ments of the local utility or authority having juris-
diction.
The installer is referred to the American Standard
‘*Installation of Gas Appliances and Gas Piping,”
ASA Z21.30-1964, as a sound and practical guide
to be followed when making the installation.
INSPECTION
Check the power supply available to be sure it
agrees with the information on the wiring diagram
and the blower motor in the furnace.
Check the gas specification on the A.G.A. rating
plate to be sure that the type of gas for which the
unit is equipped is the same as the gas supply
available.
Leave these instructions near the furnace.
Installation Instructions
GAS
FIRED
FORCED
AIR
FURNACE
_
| 394
Series A
39394D1
12/20/65
FILTERS
When the furnace air distribution system is used for
cooling, it is recommended in certain instances that
the throw-away filters be discarded and the perma-
nent type, multi-velocity filters be substituted. The
following table gives the air flows above which
these high velocity filters should be used.
Throw-away Filters Permanent Filters
xia: Air Flow - cfm Air Flow - cfm
50 1000 ==
80 1000 1785
100 1000 1785
125 1420 2020
Permanent filters are not required on Size 50.

Bryant 394U Specifications

General

Model	394U
Configuration	Upflow/Horizontal
Heating Capacity	40, 000 to 120, 000 BTU/h
Fuel Type	Natural Gas or Propane
Warranty (Parts)	10 Years
Vent Type	Direct Vent
Warranty (Heat Exchanger)	Lifetime

Summary

Furnace Configuration and Initial Checks

Furnace Installation Types

Describes the Bryant Model 394 furnace configurations: Upflow, Counter-Flow, and Basement.

Pre-Installation Inspection and Filter Guidance

Covers essential inspection points and recommendations for air filters when used with cooling.

Upflow Furnace Specifications

Counterflow Furnace Specifications

Basement Furnace Specifications

Gas Control Options and Components

Unit Location and Clearance Requirements

Gas Piping Installation and Capacity

Furnace Venting and Flue Connections

Blower Operation and Speed Adjustment

Electrical Connections and Thermostat Placement

Furnace Start-Up and Pilot Flame Adjustment

Checking Furnace Controls and Operation

Furnace Cleaning and Maintenance

Furnace Cleaning Procedures

Step-by-step instructions for cleaning burners, pilots, baffles, and combustion chambers.

Routine Care and Maintenance

Covers blower lubrication, filter cleaning/replacement, and heat exchanger inspection.

Venting Arrangement for Multiple Units

Direct Drive Wiring Diagrams

Standard D4 or D5 Wiring Diagrams

Counterflow Wiring Diagrams

Belt Drive Wiring Diagrams

Propane Wiring Diagrams