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NOTE: Read the entire instruction manual before starting the
installation.
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indicates a change since the last issue.
Index
DIMENSIONAL DRAWING........................................................2
SAFETY CONSIDERATIONS .....................................................3
Clearances to Combustibles......................................................3
INTRODUCTION ..........................................................................4
APPLICATIONS ......................................................................4-11
General ......................................................................................4
Upflow Applications..............................................................4-6
Downflow Applications.........................................................7-8
Horizontal Left (Supply-Air Discharge) Applications .........8-9
LOCATION ............................................................................11-13
General...............................................................................11-12
Low-Fire Only Installation .....................................................12
Furnace Location Relative to Cooling Equipment ................12
Hazardous Locations...............................................................13
INSTALLATION....................................................................13-17
Leveling Legs (If Desired) .....................................................13
Installation In Upflow or Downflow Applications ..........13-15
Installation In Horizontal Applications ..................................15
Filter Arrangement..................................................................16
Bottom Closure Panel.............................................................16
Gas Piping...............................................................................17
ELECTRICAL CONNECTIONS...........................................17-21
115-v Wiring......................................................................17-18
24-v Wiring........................................................................18-20
Accessories ........................................................................20-21
DIRECT VENTING ...............................................................21-29
Common Vent Systems.....................................................21
Combustion-Air and Vent Piping .....................................21-26
Kit Installation..............................................................26-29
Multiventing and Vent Terminations .....................................29
CONDENSATE DRAIN..............................................................29
General ....................................................................................29
Application ..............................................................................29
Condensate Drain Protection ..................................................29
SEQUENCE OF OPERATION..............................................31-34
Self-Test Mode........................................................................31
Heating Mode ....................................................................31-32
installation, start-up,
and operating instructions
DELUXE 4-WAY MULTIPOISE
VARIABLE-CAPACITY DIRECT-VENT
CONDENSING GAS FURNACE
A93040
Page
-1-
Cancels: II 355M-40-4
®
SM
As an ENERGY STAR
Partner, Bryant Heating &
Cooling Systems Com-
pany has determined that
CERTIFICATION OF MANUFACTURING SITE
this product meets the EN-
ERGY STAR guidelines
for energy efficiency.
UPFLOW
HORIZONTAL
LEFT
DOWNFLOW
AIRFLOW
Fig. 1-Multipoise Orientations
Heating Mode-Two Stage ....................................................32
Emergency Heat Mode ...........................................................32
Cooling Mode .........................................................................32
Heat Pump Mode...............................................................32-33
Continuous Fan Mode ............................................................33
Component Test ......................................................................34
Bypass Humidifier Mode........................................................34
Dehumidification Mode ..........................................................34
Zone Mode ..............................................................................34
START-UP PROCEDURES ..................................................34-42
General ....................................................................................34
Select Setup Switch Positions...........................................34-35
Prime Condensate Trap With Water.................................35-36
Purge Gas Lines......................................................................37
Adjustments .......................................................................37-42
Set Gas Input Rate ............................................................37-41
Set Temperature Rise ........................................................41-42
Set Thermostat Heat Anticipator............................................42
CHECK SAFETY CONTROLS ............................................42-43
Check Primary Limit Control.................................................42
Check Pressure Switch ......................................................42-43
CHECKLIST...........................................................................43-44
355MAV
Series D
II 355M-40-5
7-97
ama
A PP R O VED
R
AIRFLOW
HORIZONTAL
RIGHT
AIRFLOW
AIRFLOW
A93041
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Table of Contents
Related Manuals for Bryant BRYANT 355M-40-4
Summary of Contents for Bryant BRYANT 355M-40-4
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Page 1: Table Of Contents
SEQUENCE OF OPERATION...31-34 Self-Test Mode...31 Heating Mode ...31-32 Cancels: II 355M-40-4 ® A93040 As an ENERGY STAR Partner, Bryant Heating & Cooling Systems Com- pany has determined that CERTIFICATION OF MANUFACTURING SITE this product meets the EN- Page ERGY STAR guidelines for energy efficiency. -
Page 2: Dimensional Drawing
—2—... -
Page 3: Safety Considerations
CAUTION is used to This forced air furnace is equipped for use with natural gas at altitudes 0 - 10,000 ft (0 - 3,050m), except 140 size Furnaces are only approved for altitudes 0 - 7,000 ft. (0 - 2,135m). -
Page 4: Introduction
Trap Tubing (Factory-Shipped Orientation) section for drain tube extension details. B. Condensate Trap Tubing (Factory-Shipped Orientation) NOTE: See Fig. 5 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. - Page 5 (See Fig. 5.) These elbows must be cemented together and ce- mented to condensate trap drain connection. NOTE: Failure to use CPVC elbows may allow drain to kink, preventing draining. FURNACE CONDENSATE DOOR TRAP FURNACE...
- Page 6 The LOWER collector box pressure tube (pink label) is factory connected to the pressure switch and should not require any modification. NOTE: See Fig. 5 or 6 or tube routing label on main furnace door to check for proper connections. G. Upper Collector Box and Inducer Housing (Unused)
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Page 7: Downflow Applications
DRAIN TUBE (VIOLET) Fig. 7—Downflow Tube Configuration (Left-Hand Trap Installation) NOTE: See Fig. 5 or 6 or tube routing label on main furnace door to check for proper connections. H. Condensate Trap Freeze Protection Refer to Condensate Drain Protection section for recommenda- tions and procedures. -
Page 8: Horizontal Left (Supply-Air Discharge) Applications
MUST be connected to the pressure switch in DOWNFLOW or HORIZON- TAL RIGHT applications. NOTE: See Fig. 7 or 8 or tube routing label on main furnace door to check for proper connections. Relocate tubes as described below. -
Page 9: Horizontal Right (Supply-Air Discharge) Applications
The LOWER collector box pressure tube (pink label) is factory connected to the pressure switch and should not require any modification. NOTE: See Fig. 9 or tube routing label on main furnace door to check for proper connections. E. Condensate Trap Freeze Protection Refer to Condensate Drain Protection section for recommenda- tions and procedures. - Page 10 FURNACE AND CONDENSATE TRAP WHEN A CONDENSING FURNACE IS INSTALLED ABOVE FINISHED CEILINGS. B. Condensate Trap Tubing NOTE: See Fig. 11 or tube routing label on main furnace door to check for proper connections. 1. Collector Box Drain Tube a. Remove factory-installed plug from LOWER collector box drain tube (blue and white striped label).
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Page 11: Location
(See Fig. 10 or 29.) LOCATION I. GENERAL When a furnace is installed so that supply ducts carry air to areas outside the space containing the furnace, return air must also be handled by ducts sealed to furnace casing. The ducts terminate outside the space containing the furnace to ensure there will not be a negative pressure condition within equipment room or space. -
Page 12: Low-Fire Only Installation
See Fig. 25 and Table 10. With this setup, high-fire operation will not occur. When the model no. on the furnace rating plate is followed by an asterisk (*), the furnace has an alternate low-fire only efficiency rating as listed in the GAMA and CEC directories. -
Page 13: Hazardous Locations
2. For each hole, install nut on bolt and then install bolt and nut in hole. (Install flat washer if desired.) 3. Install another nut on other side of furnace base. (Install flat washer if desired.) 4. Adjust outside nut to provide desired height, and tighten inside nut to secure arrangement. - Page 14 Downflow Applications on Combustible Flooring Using KGASB Subbase 17-1/2 Furnace with or without CD5 or CK5 Coil Assembly or KCAKC Coil Box Downflow Applications on Combustible Flooring NOT Using KGASB Subbase Furnace with CD5 or CK5 Coil Assembly or KCAKC Coil Box...
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Page 15: Installation In Horizontal Applications
III. INSTALLATION IN HORIZONTAL APPLICATIONS These furnaces can be installed horizontally in either horizontal left or right discharge position. In a crawlspace, furnace can either be hung from floor joist or installed on suitable blocks or pad. Furnace can be suspended from each corner by hanger bolts and angle iron supports. -
Page 16: Filter Arrangement
See Table 2 to determine correct filter size for desired filter location. Table 2 indicates filter size, location, and quantity shipped with this furnace. See Fig. 2 for location and size of bottom and side return-air openings. -
Page 17: Gas Piping
2 in. outside furnace casing. An accessible manual shutoff valve MUST be installed upstream of furnace gas controls and within 6 ft of furnace. A 1/8-in. NPT plugged tapping, accessible for test gage connection, MUST be installed immediately upstream of gas supply connection to furnace and downstream of manual shutoff valve. -
Page 18: 24-V Wiring
LOCATION A93033 CAUTION: If manual disconnect switch is to be mounted on furnace, select a location where a drill or fastener will not contact electrical or gas components. II. 24-V WIRING Make field 24-v thermostat connections at 24-v terminal block on control center. - Page 19 USED) (WHEN LGPS 5BLU 4YEL 3VIO EAC2 2ORN EAC1 1RED NOTE IND. OFF-DELAY BLOWER TEST COMP. HEAT EMER. HEAT —19—...
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Page 20: Accessories
An alternate method to attach EAC lead to control center is the following procedure: (1.) Remove 2 screws securing the control box to furnace blower shelf. (2.) Remove and discard 2 factory-supplied leads from control center EAC terminals. (3.) Strip EAC power leads insulation approximately 1/8 in. -
Page 21: Direct Venting
I. REMOVAL OF EXISTING FURNACES FROM COMMON VENT SYSTEMS If furnace being replaced was connected to a common vent system with other appliances, the following steps shall be followed with each appliance connected to the venting system placed in opera-... - Page 22 2. When installing vent systems of short pipe length, use the NOTE: Do not count elbows or pipe sections in terminations or within furnace. See shaded areas in Fig. 31, 32, 33, 34, and 35. —22— Select 1 vent pipe connection and...
- Page 23 VERTICAL TO ROOF NOTE: A 12 In. minimum offset pipe section is recommended with NOTE: A 2-in. diameter pipe must be used within the furnace casing. Make all pipe diameter transitions outside furnace casing. NOTE: DO NOT OVERTIGHTEN SCREW. Breakage to intake housing or fitting may cause air leakage to occur.
- Page 24 TABLE 6—MAXIMUM ALLOWABLE PIPE LENGTH (FT) UNIT TERMINATION ALTITUDE SIZE 2 Pipe or 2-In. 042040 2 Pipe or 2-In. 042060 042080 2 Pipe or 2-In. 060080 0 to 2000 2 Pipe or 2-In. 060100 2 Pipe or 3-In. 060120 UNIT TERMINATION ALTITUDE SIZE...
- Page 25 3. Assume two 45° elbows equal one 90° elbow. Long radius elbows are desirable and may be required in some cases. 4. Elbows and pipe sections within the furnace casing and at the vent termination should not be included in vent length or elbow count.
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Page 26: Concentric Vent And Combustion-Air Termination Kit Installation
If use of this drain connection is desired, drill out fitting’s tap plug with a 3/16-in. drill and connect a field-supplied 3/8-in. tube. This tube should be routed to open condensate drain for furnace and A/C (if used), and should be trapped. (See Fig. 30.) COMBUSTION – AIR INTAKE HOUSING 3/8"... - Page 27 VERTICAL SEPARATION BETWEEN COMBUSTION AIR AND VENT 8 3 / 4 FOR 3 KIT 6 3 / 4 FOR 2 KIT MAINTAIN 12 IN. MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL. MAXIMUM OF 24 IN. ABOVE ROOF. VENT MAINTAIN 12 IN. (18 IN.
- Page 28 TABLE 7—MAXIMUM ALLOWABLE EXPOSED VENT PIPE LENGTH (FT) WITH INSULATION IN WINTER DESIGN WINTER DESIGN UNIT TEMPERATURE SIZE (°F) 042040 042060 042080 060080 060100 060120 * Pipe length (ft) specified for maximum pipe lengths located in unconditioned spaces. Pipes located in unconditioned space cannot exceed total allowable pipe length as specified in Table 6.
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Page 29: Multiventing And Vent Terminations
To avoid conden- sate spillage, select a pump with an overflow switch. Furnace condensate is mildly acidic, typically in the pH range of 3.2 to 4.5. Due to corrosive nature of this condensate, a condensate pH neutralizing filter may be desired. - Page 30 Fig. 36—Rooftop Termination (Dimension "A" is Touching or 2-In. Maximum Separation) VENT Fig. 37—Concentric Vent and Combustion-Air Roof Termination (Dimension "A" is Touching or 2-In. Maximum Separation) VENT COMBUSTION AIR Fig. 39—Sidewall Termination of 12 in. or Less (Dimension "A" is Touching or 2-In. Maximum Separation) VENT COMBUSTION AIR...
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Page 31: Sequence Of Operation
This furnace has a new control system. Read and follow wiring diagram carefully. NOTE: If 115-v power supply to furnace or blower access panel switch is interrupted during a call for heat, blower operates at low-heat speed for 60 sec when power is restored before heating cycle is resumed. -
Page 32: Heating Mode-Two Stage
R-W/W1 signal is received. If thermostat control over furnace staging is desired, a 2-stage thermostat can be used. When control center receives a thermostat R-W/W1 and R-W2 signal, high heat is energized and when a R-W/W1 signal alone is received, low heat is energized. -
Page 33: Continuous Fan Mode
VARIABLE 2-SPEED SPEED THERMOSTAT THERMOSTAT W/W1 Y/Y2 Fig. 43—Wiring Schematic for 2-Speed Cooling Applications 2. Humidifier—The HUM terminal is energized after inducer prepurge period is completed. 3. Ignitor warm up—After prepurge period, HSI is energized for 17 sec. 4. Ignition sequence—After HSI warm-up period is com- pleted, the gas valve is energized, permitting gas flow to the burners where it is ignited. -
Page 34: Component Test
IX. BYPASS HUMIDIFIER MODE When setup switch SW-3 BPH is in ON position, RPM calculated for low heat is multiplied by 1.15 for all furnace model sizes. This compensates for increased return-air temperature caused by by- passed air supply. -
Page 35: Prime Condensate Trap With Water
NOTE: If modulating dampers are used, setup switch SW-5 (MZ) should be in ON position. This allows furnace control center to compensate for modulating dampers. The control re-calibrates for new system static conditions once every minute while operating in low-heat or continuous fan modes. - Page 36 RPM. NO safeties are bypassed. Turn switch to ON when modulating dampers are used. In this mode, main blower speed is recalculated once every minute while furnace is in low-heat or continuous fan mode. Turn switch to ON to initiate component test. Furnace will operate in-...
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Page 37: Purge Gas Lines
V. ADJUSTMENTS A. Set Gas Input Rate Furnace gas input rate on rating plate is for installations at altitudes up to 2000 ft. In the U.S.A., the input rating for altitudes above 2000 ft must be reduced by 2 percent for each 1000 ft above sea level. - Page 38 TABLE 12—MODEL 355MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT (TABULATED DATA BASED ON 20,000 BTUH HIGH HEAT/13,000 BTUH LOW HEAT PER BURNER DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL) AVG GAS ALTITUDE 0.58 HEAT VALUE RANGE AT ALTITUDE Orifice (FT)
- Page 39 TABLE 12—MODEL 355MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT (TABULATED DATA BASED ON 20,000 BTUH HIGH HEAT/13,000 BTUH LOW HEAT PER BURNER DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL) AVG GAS ALTITUDE 0.58 HEAT VALUE RANGE AT ALTITUDE Orifice (FT)
- Page 40 TABLE 12—MODEL 355MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT (TABULATED DATA BASED ON 20,000 BTUH HIGH HEAT/13,000 BTUH LOW HEAT PER BURNER DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL) AVG GAS ALTITUDE 0.58 HEAT VALUE RANGE AT ALTITUDE Orifice (FT)
- Page 41 BURNER FLAME MANIFOLD Fig. 49—Burner Flame At altitudes above 2000 ft, this furnace has been ap- proved for a 2 percent derate for each 1000 ft above sea level. See Table 13 for derate multiplier factor and example.
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Page 42: Set Temperature Rise
The amp reading should be taken after blower motor has started and furnace is operating in low heat. 1. To operate furnace in low heat, turn setup switch SW-2 to ON position (See Fig. 25) and connect ammeter leads across thermostat subbase R-W. -
Page 43: Check Pressure Switch
10 sec after thermostat switch is closed. If either a fault code 31 or 32 is flashed when ICM inducer motor is disconnected, the furnace will shut itself down immediately. Determine the reason pressure switches did not function properly and correct the condition. - Page 44 Course descriptions and schedules are in our catalog. CALL FOR FREE CATALOG 1-800-962-9212 [ ] Packaged Service Training © 1997 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 CHECKLIST—INSTALLATION ________ ________...