Bryant 355AAV Installation Instructions Manual
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Bryant 355AAV Installation Instructions Manual

Bryant 355AAV Installation Instructions Manual

4-way multipoise variable-capacity condensing gas furnace for sizes 040-120, series c
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355AAV
4- -WAY MULTIPOISE
VARIABLE- - CAPACITY CONDENSING GAS FURNACE
FOR SIZES 040- - 120, SERIES C
Visit www.bryant.com
NOTE:
Read the entire instruction manual before starting
the installation. Please retain these instructions with the furnace
after installation for future reference.
NOTE: This furnace can be installed as a
or (1-pipe) non-direct vent
Special Venting Requirements for Installations in Canada
Installation in Canada must conform to the requirements of CSA
B149 code. Vent systems must be composed of pipe, fittings,
cements, and primers listed to ULC S636. The special vent fittings
and accessory concentric vent termination kits and accessory
external drain trap have been certified to ULC S636 for use with
those IPEX PVC vent components which have been certified to
this standard. In Canada, the primer and cement must be of the
same manufacturer as the vent system - - IPEX System 636,
PVC/CPVC Primer, Purple Violet for Flue Gas Venting and IPEX
(1)
System 636
t, PVC Cement for Flue Gas Venting, rated Class
IIA, 65 deg C. must be used with this venting system - - do not mix
primers and cements from one manufacturer with a vent system
from a different manufacturer.
instructions in the use of primer and cement and never use primer
or cement beyond its expiration date.
The safe operation, as defined by ULC S636, of the vent system is
based on following these installation instructions, the vent system
manufacturer's installation instructions, and proper use of primer
and cement. All fire stop and roof flashing used with this system
must be UL listed material. Acceptability under Canadian standard
CSA B149 is dependent upon full compliance with all installation
instructions. Under this standard, it is recommended that the vent
system be checked once a year by qualified service personnel.
The authority having jurisdiction (gas inspection authority,
municipal building department, fire department, etc) should be
consulted before installation to determine the need to obtain a
permit.
(1) System 636 is a trademark of IPEX Inc.

Installation Instructions

(2-pipe) direct vent
condensing gas furnace.
Follow the manufacturer's
ama
ISO 9001:2000
REGISTERED
Consignes spéciales pour l'installation de ventillation au Canada
L'installation faite au Canada doit se conformer aux exigences du
code CSA B149. Ce systême de ventillation doit se composer de
tuyaux, raccords, ciments et apprêts conformes au ULC S636. La
tuyauterie de ventillation des gaz, ses accessoires, le terminal
concentrique mural ainsi que l'ensemble du drain de condensat
extérieur ont été certifiés ULCS 636 pour l'application des
composantes IPEX PVC qui sont certifiées à ce standard. Au
Canada l'apprêt et le ciment doivent être du même manufacturier
que le systême de ventillation - - IPEX Système 636, Apprêt
PVC/CPVC. Mauve Violette pour conduit en évacuation des gaz et
IPEX Système 636
t, ciment pour PVC pour conduit en
(1)
évacuation des gaz, évalué CLASSE IIA, 65 deg. C. doit ëtre
utilisé avec ce systèeme d'évacuation - - ne pas mélanger l'apprêt et
le ciment d'un manufacturier avec le systême de ventillation d'un
autre manufacturier. Bien suivre les indications du manufacturier
lors de l'utilisation de l'apprêt et du ciment et ne pas utiliser
ceux- -ci si la date d'expiration est atteinte.
L'opération sécuritaire, tel que définit par ULC S636, du système
de ventilation est basé sur les instructions d'installation suivantes,
ainsi que l'usage approprié de l'apprêt et ciment. Tout arrët feu et
solin de toit utilisés avec ce système doivent être des matériaux
listés UL. L'acceptation du standard Canadien CSA B419 est
directement relié à l'installation conforme aux instructions ci- - haut
mentionnées. Le standard Canadien recommande l' inspection par
un personel qualifié et ce, une fois par année.
Les autoritées ayant juridiction (inspecteurs de gas, inspecteurs en
bâtiments, département des incendies, etc) devraient être consultées
avant l'installation afin de déterminer si un permis est requis.
1
CERTIFIED

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  • Page 1: Installation Instructions

    4- -WAY MULTIPOISE VARIABLE- - CAPACITY CONDENSING GAS FURNACE FOR SIZES 040- - 120, SERIES C Installation Instructions Visit www.bryant.com NOTE: Read the entire instruction manual before starting the installation. Please retain these instructions with the furnace after installation for future reference.

  • Page 2: Important

    Required Notice for Massachusetts Installations IMPORTANT The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows: 5.08: Modifications to NFPA- -54, Chapter 10 2) Revise 10.8.3 by adding the following additional requirements: a. For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:...

  • Page 3: Table Of Contents

    CAUTION ......TABLE OF CONTENTS PAGE FURNACE RELIABILITY HAZARD IMPORTANT ........Improper installation or misapplication of furnace may require excessive servicing or cause premature component SAFETY CONSIDERATIONS...
  • Page 4 " (684 mm) ⁄ (724 mm) " ⁄ (667 mm) ⁄ " " (684 mm) ⁄ AIRFL OW (667 mm) " (622 mm) ⁄ " ⁄ (14 mm) (567 mm) ⁄ " (567 mm) ⁄ " " ⁄ (483 mm) 19 "...
  • Page 5 335122-201 REV. B LIT TOP A08435 Fig. 3 - - Clearances to Combustibles When a furnace is installed so that supply ducts carry air circulated structure. by the furnace to areas outside the space containing the furnace, the S The furnace is controlled by a thermostat. It may not be “hot return air shall also be handled by ducts sealed to the furnace wired”...

  • Page 6: Codes And Standards

    construction process must be either changed or thoroughly S CANADA: National Standard of Canada, Natural Gas and cleaned prior to occupancy. Propane Installation Code (NSCNGPIC) CAN/CSA B149.1- -05 S The furnace, ductwork and filters are cleaned as necessary to Step 2 — General Installation remove drywall dust and construction debris from all HVAC S US: NFGC and the NFPA 90B.

  • Page 7: Introduction

    6. 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.
  • Page 8 b. Remove and discard casing drain hole plug button from Tubing (Alternate Upflow Orientation) section for tubing desired side. attachment. c. Install drain tube coupling grommet (factory- -supplied To relocate condensate trap to the left- -hand side, perform the in loose parts bag) in selected casing hole. following: d.
  • Page 9 PLUG PLUG COLLECTOR BOX DRAIN TUBE (BLUE & WHITE STRIPED) COLLECTOR BOX COLLECTOR BOX DRAIN TUBE (BLUE TUBE (PINK) & WHITE STRIPED) COLLECTOR BOX TUBE (PINK) COLLECTOR BOX INDUCER HOUSING TUBE (GREEN) (MOLDED) DRAIN TUBE (BEHIND COLLECTOR BOX DRAIN TUBE) COLLECTOR BOX DRAIN TUBE (GREEN) COLLECTOR BOX...
  • Page 10 COLLECTOR BOX DRAIN TUBE (BLUE) COLLECTOR BOX PLUG TUBE (GREEN) PLUG COLLECTOR BOX TUBE (GREEN) COLLECTOR BOX DRAIN TUBE (BLUE) COLLECTOR BOX COLLECTOR BOX TUBE (PINK) TUBE (PINK) COLLECTOR BOX COLLECTOR BOX DRAIN TUBE (BLUE DRAIN TUBE (BLUE & WHITE STRIPED) &...
  • Page 11 PLUG COLLECTOR BOX AUXILIARY "J" BOX DRAIN TUBE (BLUE AND WHITE STRIPED) CONDENSATE COLLECTOR BOX TRAP TUBE (GREEN) INDUCER HOUSING COLLECTOR BOX DRAIN TUBE (VIOLET) EXTENSION TUBE COLLECTOR BOX COLLECTOR DRAIN TUBE (BLUE) BOX EXTENSION DRAIN TUBE DRAIN TUBE COUPLING COLLECTOR BOX TUBE (PINK) RELOCATE TUBE BETWEEN BLOWER SHELF AND INDUCER HOUSING FOR 060, AND 080 HEATING INPUT FURNACES...

  • Page 12: Caution

    COMBUSTION - AIR INTAKE VENT A 12-IN. (305 mm) MIN HORIZONTAL PIPE SECTION IS RECOMMENDED WITH SHORT (5 TO 8 FT / 1.5 TO 2.4 M) VENT SYSTEMS TO REDUCE EXCESSIVE CONDENSATE DROPLETS FROM EXITING THE VENT PIPE. ″ (762 mm)MIN WORK AREA ″...
  • Page 13 A 3-IN.(76mm) MINIMUM CLEARANCE VENT TO COMBUSTION-AIR INTAKE IS REQUIRED. COMBUSTION AIR INTAKE A 12-IN. (305mm) MIN HORIZONTAL PIPE SECTION IS RECOMMENDED WITH SHORT (5 TO 8 FT / 1.5 TO 2.4M) VENT SYSTEMS TO REDUCE EXCESSIVE CONDENSATE DROPLETS FROM EXITING THE VENT PIPE.
  • Page 14 COLLECTOR BOX DRAIN TUBE (BLUE) COLLECTOR BOX TUBE (GREEN) PLUG COLLECTOR BOX TUBE (PINK) AUXILIARY "J" BOX RELOCATED HERE CONDENSATE TRAP COLLECTOR BOX DRAIN TUBE (BLUE AND WHITE STRIPED) INDUCER HOUSING DRAIN TUBE (VIOLET) COLLECTOR BOX EXTENSION TUBE A02289 Fig. 14 - - Horizontal Right Tube Configuration NOTE: The auxiliary junction box (J- -box) MUST be relocated to CAUTION opposite side of furnace casing.

  • Page 15: Location

    1. Collector Box Drain Tube 4. Use remaining small diameter tube (factory- -supplied in loose parts bag) to extend collector box pressure tube (pink a. Remove factory- -installed plug from LOWER collector label) which was previously connected to pressure switch. box drain tube (blue and white striped label).
  • Page 16 WARNING CAUTION FIRE, INJURY OR DEATH HAZARD UNIT DAMAGE HAZARD Failure to follow this warning could result in fire, property Failure to follow this caution may result in minor property or damage, personal injury, or death. unit damage. Do NOT install furnace on its back. (See Fig. 16.) Safety If these furnaces are installed in an unconditioned space where control operation will be adversely affected.

  • Page 17: Air For Combustion And Ventilation

    NON- -DIRECT VENT (1- -PIPE) APPLICATION CAUTION CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in minor property or UNIT DAMAGE HAZARD unit damage. Failure to follow this caution may result in intermittent unit The furnace can operate in the high- -heat mode when certain operation.
  • Page 18 pressure in the equipment room or space. A positive seal must be Indoor combustion air is permitted for combustion, ventilation, made between the furnace cabinet and the return- -air duct to and dilution, if the Standard or Known- -Air- -Infiltration Rate prevent pulling air from the burner area.
  • Page 19 Table 1 – Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors FURNACE TWO HORIZONTAL DUCTS SINGLE DUCT OR OPENING TWO OPENINGS OR VERTICAL DUCTS INPUT (1 SQ. IN./2,000 BTUH) (1,100 SQ. MM/KW) (1 SQ. IN./3,000 BTUH) (734 SQ. MM/KW) (1 SQ.
  • Page 20 1 SQ IN. CIRCULATING AIR PER 4000 VENT THROUGH ROOF DUCTS DUCTS BTUH* O UTDOORS 12" MAX (305mm) 12 ″ MAX 12 ″ (305mm) (305mm) 1 SQ IN. VENT 1 SQ IN. PER 2000 THR OUGH PER 1000 BTUH* R OOF BTUH* IN DOOR 1 SQ IN .

  • Page 21: Ductwork Acoustical Treatment

    Manufacturer’s Coil Assembly or when Manufacturer’s Coil Box is furnace, the return air must also be handled by a duct(s) sealed to the furnace casing and terminating outside the space containing the used. furnace. 1. Determine application being installed from Table 3. Secure ductwork with proper fasteners for type of ductwork used.
  • Page 22 FURNACE FACTORY SUPPLIED CASED COIL OR COIL BOX COMBUSTIBLE FLOORING PLENUM OPENING SHEET METAL PLENUM FLOOR OPENING FLOOR OPENING A96283 A07586 Fig. 22 - - Floor and Plenum Opening Dimensions Fig. 24 - - Furnace, Plenum, and Coil Assembly or Coil Box Installed on a Combustible Floor PERFORATED FURNACE...
  • Page 23 Table 3 – Opening Dimensions --- In. (mm) FURNACE PLENUM OPENING FLOOR OPENING CASING APPLICATION WIDTH 24-1/8 16-5/8 24-3/4 Upflow Applications (406) (613) (422) (629) 15-7/8 16-1/2 19-5/8 Downflow Applications on Non-Combustible Flooring (403) (483) (419) (498) 17-1/2 Downflow Applications on Combustible Flooring Using KGASB Sub- 15-1/8 16-3/4 20-3/8...

  • Page 24: Return Air Connections

    RETURN AIR CONNECTIONS CAUTION WARNING CUT HAZARD Failure to follow this caution may result in personal injury. FIRE HAZARD Use care when cutting support rods in filters to protect against Failure to follow this warning could result in fire, personal flying pieces and sharp rod ends.
  • Page 25 Step 6 — Bottom Closure Panel WASHABLE FILTER These furnaces are shipped with bottom closure panel installed in bottom return- -air opening. This panel MUST be in place when side return air is used. FILTER To remove bottom closure panel, perform following: RETAINER 1.
  • Page 26 Table 5 – Maximum Capacity of Pipe* NOMINAL SUPPLY LENGTH OF PIPE --- FT. (M) INTERNAL IRON DIA. MANUAL PIPE SIZE IN. (MM) (3.0) (6.0) (9.1) (12.1) (15.2) SHUTOFF IN. (MM) VALVE 0.622 1/2 (13) (REQUIRED) (158) 3/4 (19) 0.824 (21) SEDIMENT 1 (25) 1.049 (27)
  • Page 27 COMBUSTION-AIR PIPE GROMMET UNUSED 1-3/4 -IN. (44 mm) DIAMETER GAS COMBUSTION CONN. HOLE -AIR PIPE GAS LINE GAS LINE ENTRY HOLE FILLER PLUG VENT PIPE GAS LINE GROMMET VENT PIPE GROMMET NOTE: PIPE GROMMETS AND ENTRY HOLE FILLER PLUGS ARE INCLUDED IN FACTORY-SUPPLIED LOOSE PARTS BAG A05057 Fig.
  • Page 28 Table 6 – Electrical Data OPERATING VOLTAGE MAXIMUM MAXIMUM FUSE VOLTS--- MAXIMUM MINIMUM RANGE WIRE LENGTH OR CKT BKR HERTZ--- UNIT UNIT SIZE WIRE SIZE FT. (M)} AMPS** PHASE AMPS Maximum* Minimum* 040--- 14 / 042040 115--- 60--- 1 8.90 31 (9) 060--- 14 / 042060 115--- 60--- 1...
  • Page 29 GENERAL 24- - V Wiring For additional venting information, contact www.Bryant.com. Make field 24- -v thermostat connections at 24- -v terminal block on Vent system or vent connectors may need to be resized. For any furnace control. Y wire from thermostat MUST be connected to other appliances when resizing vent systems or vent connectors, Y/Y2 terminal on control, as shown in Fig.
  • Page 30 ALTERNATE FIELD FACTORY LOCATION INSTALLED LOCATION POWER ENTRY HOLE FILLER PLUG (FACTORY- SUPPLIED LOOSE PARTS BAG) POWER ENTRY HOLE FILLER PLUG (FACTORY- UNUSED 7/8-IN. (22 mm) DIAMETER SUPPLIED LOOSE PARTS BAG) POWER ENTRY HOLES UNUSED 7/8-IN. (22 mm) DIAMETER POWER ENTRY HOLES A05058 Fig.

  • Page 31: Combustion Air Pipe

    Table 7 – Approved Combustion- -Air and Vent Pipe, Fitting and Cement Materials ASTM SPECIFICATION SOLVENT CEMENT AND (MARKED ON MATERIAL PIPE FITTINGS DESCRIPTION PRIMERS MATERIAL) D1527 Pipe — — Schedule—40 D1785 Pipe — — Schedule—40 D2235 For ABS — —...
  • Page 32 12 inches (30 cm) for applieances >10,000 Btuh(3 kW) and < 100,000 Btuh(30kW), 36 inches (91cm) for appliances > 100,000 Btuh(30kW) A08600 Table 8 – Direct Vent Termination Clearance...
  • Page 33 A08601 Table 9 – Other than Direct Vent Termination Clearance...
  • Page 34 A07902 Fig. 36 - - Wiring Diagram...
  • Page 35 USER INTERFACE CONTINUOUS FAN SW4 SETUP OR ADVANCED (CF) AIRFLOW SWITCHES PRODUCT SETUP SWITCHES MODEL PLUG CONNECTOR MONITOR CONNECTOR CONNECTOR SW1 SETUP SWITCHES AND BLOWER OFF- DELAY AIR CONDITIONING (A/C) AIRFLOW SETUP SWITCHES HUMIDIFIER TERMINAL (24-VAC 0.5 AMP MAX. ACRDJ – AIR CONDITIONING RELAY DISABLE JUMPER...

  • Page 36: Vent Pipe

    Table 10 – Maximum Allowable Exposed Vent Pipe Length (Ft / M) with Insulation in Winter Design Temperature Ambient* WINTER DESIGN MAXIMUM PIPE INSULATION THICKNESS --- IN. (mm)† TEMPERATURE TEMPERATURE DIAMETER DIAMETER UNIT SIZE 0 (0) 3/8” (10) 1/2” (13) 3/4”...
  • Page 37 Table 11 – Maximum Allowable Pipe Length (Ft. / M) VARIABLE SPEED VENT SIZING TABLE Direct & Non--- NUMBER OF 90_ ELBOWS Direct Pipe ALTITUDE UNIT SIZE Termination Dia. FT. (M) (BTUH) Type In. (mm)* 2 Pipe or 2 ---In. 1 ---1/2 (38) 50 (15) 45 (14)
  • Page 38 Table 11 — Maximum Allowable Pipe Length (Ft. / M) (Continued) Variable Speed Vent Sizing Table NUMBER OF 90_ ELBOWS Direct & Non--- ALTITUDE UNIT SIZE Termination Direct Pipe FT. (M) (BTUH) Type Dia. In. (mm)* 2 Pipe or 2 ---In. 1 ---1/2 (38) 35 (11) 30 (9)
  • Page 39 CAUTION UNIT DAMAGE HAZARD FURNACE Failure to follow this caution may result in unit component damage. Inducer housing outlet cap must be installed and fully seated against inducer housing. Clamp must be tightened to prevent NOT IN any condensate leakage. HORIZONTAL SECTION PIPE DIAMETER...

  • Page 40: Vent Termination

    11. Horizontal portions of the venting system shall be 1. Comply with all clearance requirements stated in Table 8 or supportive to prevent sagging support. Support combustion Table 9 per application. air piping (if applicable) and vent piping a minimum of 2.
  • Page 41 12 ″ MIN (305mm) 12 ″ MIN (305mm) VENT PIPE VENT PIPE COMBUSTION-AIR PIPE COMBUSTION-AIR PIPE HORIZONTAL TO ROOF HORIZONTAL TO SIDEWALL COMBUSTION-AIR PIPE VENT PIPE COMBUSTION-AIR PIPE 12 ″ MIN (304.8mm) 12 ″ MIN VENT PIPE (304.8mm) VERTICAL TO ROOF VERTICAL TO SIDEWALL NOTE: A 12-in.
  • Page 42 Roof T e rmination (Preferred) At least 36 in. (914mm) Concentric Vent and Combustion Air Roof Termination (preferred) Vertical separation between combustion At least air and vent 36 in. (305mm) 8 3/4 in. (222mm)for 3 in. (76mm)kit Maintain 12 min. clearance above 18 in.
  • Page 43 Table 12 – Vent Termination Kit for Direct Vent / 2- -Pipe System DIAMETER OF COMBUSTION AIR AND DIRECT VENT (2 PIPE) TERMINATION KIT TERMINATION SYSTEM VENT PIPES --- IN. (MM) 1, 1--- 1/2, 2, or 2--- 1/2 2--- in. (51 mm) Concentric Vent Kit Single Penetration of Wall or Roof (25, 38, 51, or 64) 3--- in.
  • Page 44 AIR CONDITIONING 040,060 & 080---14 AIRFLOW* (CFM) 080---20 & 100 MODEL 120 MODEL TONS (12,000 BTU/HR) MODEL 1--- 1/2 525 (600) 700 (800) 2--- 1/2 875 (1000) 1050 (1200) 3--- 1/2 1225 (1400) 1400 (1600) 1750 (2000) 2100 (2100) X Indicates an allowable selection. * Airflow shown in parentheses is airflow unit that the unit will deliver when setup switch SW1 ---5 is ON (selects 400 CFM/ton) AIR CONDITIONING (A/C) OR CONTINUOUS-FAN (CF) AIRFLOW SELECTION CHART...
  • Page 45 Table 13 – Furnace Setup Switch Description SETUP SWITCH NORMAL SWITCH NAME DESCRIPTION OF USE POSITION Turn ON to retrieve up to 7 stored status codes for troubleshooting SW1--- 1 Status Code Recovery assistance when R thermostat lead is disconnected. Allows 2--- stage operation with a single stage thermostat.
  • Page 46 A99118 A99119 Fig. 49 - - Inducer Housing Drain Tube Fig. 50 - - Filling Condensate Trap SINGLE- -STAGE THERMOSTAT AND TWO- - If power is interrupted, the stored history is erased. When this happens, the control CPU will initially select low- -heat for up to 16 STAGE HEATING (ADAPTIVE MODE) minutes and then switch to high- -heat, as long as the thermostat See Fig.

  • Page 47: Cooling Mode

    TWO- -STAGE THERMOSTAT AND TWO- - ignited by the Hot Surface Igniter HSI. Five seconds after the GVR closes, a 2- -second flame period begins. The HSI STAGE HEATING igniter will remain energized until the flame is sensed or See Fig. 57 for thermostat connections. until the 2- -second flame proving period begins.

  • Page 48: Thermidistat Mode

    THERMIDISTAT MODE operation, which selects low- -cooling or high- -cooling operation. This selection is based upon the stored history of See Fig. 51- -54 for Thermidistat connections. the length of previous cooling period of the single- -stage The dehumidification output, DHUM on the Thermidistat should thermostat.

  • Page 49: Set Gas Input Rate

    exchangers to heat more quickly, then restarts at the end of the b. After waiting 15 seconds, the furnace control CPU turns blower- -ON delay period at low- -heat or high- -heat airflow the hot surface igniter ON for 15 seconds, then OFF. respectively.
  • Page 50 A00275 A00277 Fig. 51 - - Two- -Stage Furnace with Single- -Speed Fig. 53 - - Two- -Stage Furnace with Single- -Speed Air Conditioner Heat Pump (Dual Fuel) A00276 A00278 Fig. 52 - - Two- -Stage Furnace with Two- -Speed Fig.
  • Page 51 A00279 A00281 Fig. 55 - - Dual Fuel Thermostat with Two- -Stage Furnace and Fig. 57 - - Two- -Stage Thermostat with Two- -Stage Furnace Single- -Speed Heat Pump and Two- -Speed Air Conditioner See note 2 A00280 A02348 Fig. 56 - - Dual Fuel Thermostat with Two- -Stage Furnace and Fig.
  • Page 52 Notes for Fig. 51- -58: 1. Heat pump MUST have a high pressure switch for dual fuel applications. 2. Refer to outdoor equipment Installation Instructions for additional information and setup procedure. 3. Select the “ZONE” position on the two- -speed heat pump control. 4.
  • Page 53 Table 14 – Orifice Size* and Manifold Pressures for Gas Input Rate (Tabulated Data Based on 20,000 Btuh High- -Heat/13,000 Btuh Low- -Heat Per Burner, Derated 2%/1,000 Ft. (305 M) Above Sea Level) A08376A...
  • Page 54 Table 14 — Orifice Size* and Manifold Pressures for Gas Input Rate (Tabulated Data Based on 20,000 Btuh High- -Heat/13,000 Btuh Low- -Heat Per Burner, Derated 2%/1,000 Ft. (305 M) Above Sea Level) (Cont) A08376B...
  • Page 55 2. Adjust manifold pressure to obtain input rate. REGULATOR COVER SCREW a. Remove burner enclosure front. PLASTIC ADJUST SCREW NOTE: Manifold pressure MUST always be measured with the ON/OFF SWITCH burner box cover REMOVED. REGULATOR SPRING b. Remove regulator seal caps that conceal adjustment 1/2˝...
  • Page 56 e. Check and verify orifice size in furnace. NEVER BURNER FLAME ASSUME THE ORIFICE SIZE. ALWAYS CHECK BURNER AND VERIFY. f. Turn off all other gas appliances and pilots. g. Move setup switch SW1- -2 to ON position. (See Fig. 37.) This keeps furnace locked in low- -heat operation.

  • Page 57: Set Temperature Rise

    Table 16 – Gas Rate Cu Ft./Hr SIZE OF TEST DIAL SIZE OF TEST DIAL SECONDS SECONDS FOR 1 FOR 1 REVOLUTION REVOLUTION cuft. cuft. cuft. cuft. cuft. cuft. 1800 1636 1500 1385 1286 1200 1125 1059 1000 SET TEMPERATURE RISE NOTE: Temperature rise can be determined for low- -heat operation by placing setup switch SW1- -2 on furnace control in...

  • Page 58: Set Thermostat Heat Anticipator

    SET THERMOSTAT HEAT ANTICIPATOR CHECK PRIMARY LIMIT CONTROL When using a non- -electronic thermostat, the thermostat heat This control shuts off the gas control system and energizes the anticipator must be set to match the amp draw of components in air- -circulating blower motor if furnace overheats.
  • Page 59 CHECKLIST — DIRECT VENT (2 ---PIPE) INSTALLATION LOAD CALCULATION ________________ Heating Load (Btuh) Condensate Drain ________________ Cooling Load (Btuh) ________________ Unit Level or Pitched Forward ________________ ________________ Internal Tubing Connections Furnace Model Selection Free of Kinks and Traps ________________ External Drain Connection Leak COMBUSTION AND VENT PIPING Tight and Sloped ________________...
  • Page 60 ________________ Pressure Switches Catalog No. II355A ---40---4 E2008 Bryant Heating & Cooling Systems D 7310 W. Morris St. D Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 12/08 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

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