Bryant 355MAV - Manual (Page 7)

CAUTION: UNIT DAMAGE HAZARD
DO NOT use wire brush or other sharp object to inspect
or dislodge materials in secondary heat exchangers as
failure of the secondary heat exchanger may occur. Flush
with water only.
10. Reassemble inducer assembly by reversing items 5-7.
Tighten vent coupling clamp screw(s) to 15 in.-lb of torque.
NOTE: If seal between the inducer housing and the collector box
is damaged in any way, it must be repaired. To repair, apply
sealant releasing agent such as PAM cooking spray or equivalent
(must not contain corn or canola oil, aromatic or halogenated
hydrocarbons which can cause an inadequate seal to occur) to
inducer housing. (See Fig. 11.) Apply a small bead of G.E. RTV
162, G.E. RTV 6702, or Dow-Corning RTV 738 sealant to groove
in collector box.
11. Refer to furnace wiring diagram and reconnect wires to
inducer motor and pressure switches or connectors.
12. Reconnect pressure tubes to pressure switches. See diagram
on main furnace door for proper location of tubes. Be sure
tubes are not kinked. (See Fig. 9.)
13. Turn on gas and electrical supplies to furnace.
14. Check furnace operation through 2 complete heat operating
cycles. Check area below inducer housing, vent pipe, and
condensate trap to ensure no condensate leaks occur. If
leaks are found, correct the problem.
15. Check for gas leaks.
Fig. 9—Furnace Pressure and Drain Tubing Diagram
A00351
Furnace is shipped from factory in upflow configuration. Pressure tube and drain tube routing MUST match the diagrams below.
Tube location when used in DOWNFLOW application
Tube location when used on
HORIZONTAL - RIGHT application
Condensate Trap; Factory Installed
in Blower Shelf
Condensate Trap on
RIGHT Side
Condensate Trap on
LEFT Side
Tube location when used in UPFLOW application
Tube location when used on
HORIZONTAL - LEFT application
(Blower access panel removed)
1. All tubing must be connected securely and routed to avoid kinks and traps.
2. Pressure tubing must always slope away from pressure switch to collector box connection as shown.
3. HORIZONTAL-LEFT installations require the collector box pressure tube to be relocated between the inducer housing and
the blower shelf to prevent a trap.Refer to the Installation Instructions for further details.
NOTE:
325400-201 REV. C
(LIT - BOTTOM)
COLLECTOR BOX TUBE
(PINK)
COLLECTOR BOX
DRAIN TUBE
(BLUE & WHITE STRIPED)
COLLECTOR BOX DRAIN TUBE
(BLUE)
INDUCER HOUSING (MOLDED) DRAIN TUBE
(BEHIND COLLECTOR BOX DRAIN TUBE)
FIELD-INSTALLED
FACTORY-SUPPLIED DRAIN TUBE
COUPLING (LEFT DRAIN OPTION)
FIELD-INSTALLED FACTORY-
SUPPLIED DRAIN TUBE
FIELD-INSTALLED
FACTORY-SUPPLIED
1/2-IN. CPVC STREET
ELBOWS (2) FOR LEFT
DRAIN OPTION
FIELD-INSTALLED
FACTORY-SUPPLIED DRAIN
TUBE COUPLING (RIGHT
DRAIN OPTION)
COLLECTOR BOX TUBE (GREEN)
CONDENSATE TRAP
CAP
PLUG
PLUG
CAP
COLLECTOR BOX
DRAIN TUBE
(BLUE & WHITE STRIPED)
COLLECTOR BOX TUBE
(PINK)
COLLECTOR BOX DRAIN TUBE
(BLUE)
INDUCER HOUSING
DRAIN TUBE
(VIOLET)
CONDENSATE TRAP
COLLECTOR BOX TUBE
(GREEN)
Condensate Trap on LEFT
Side Optional
CAP COLLECTOR BOX DRAIN TUBE
(BLUE)
COLLECTOR BOX DRAIN TUBE
(BLUE & WHITE STRIPED)
COLLECTOR BOX TUBE (GREEN)
COLLECTOR BOX TUBE
(PINK)
COLLECTOR BOX
EXTENSION TUBE
CONDENSATE TRAP
INDUCER HOUSING DRAIN TUBE (VIOLET)
COLLECTOR BOX
EXTENSION TUBE
PLUG
PLUG
COLLECTOR BOX TUBE
(PINK)
COLLECTOR BOX DRAIN TUBE
(BLUE)
COLLECTOR BOX TUBE
(GREEN)
CONDENSATE TRAP
INDUCER HOUSING
DRAIN TUBE
(VIOLET)
COLLECTOR BOX EXTENSION TUBE
COLLECTOR BOX DRAIN TUBE
(BLUE & WHITE STRIPED)
COLLECTOR BOX EXTENSION
DRAIN TUBE
DRAIN TUBE
COUPLING
CAP
GAS VALVE
DRAIN TUBES ROUTED IN
FRONT OF GAS VALVE
PLUG
CAP
COLLECTOR BOX DRAIN TUBE
(BLUE & WHITE STRIPED)
CONDENSATE TRAP
COLLECTOR BOX EXTENSION DRAIN TUBE
COLLECTOR BOX
EXTENSION TUBE
COLLECTOR
BOX TUBE
(GREEN)
INDUCER HOUSING
DRAIN TUBE
(VIOLET)
COLLECTOR BOX TUBE (PINK) RELOCATE TUBE BETWEEN BLOWER SHELF AND
INDUCER HOUSING FOR 040,060, AND 080 HEATING INPUT FURNACES
DRAIN TUBE
COUPLING COLLECTOR BOX
DRAIN TUBE (BLUE)
AUXILIARY "J" BOX
RELOCATED HERE
CAP
PLUG
COLLECTOR BOX DRAIN TUBE (BLUE)
COLLECTOR BOX TUBE (GREEN)
COLLECTOR BOX TUBE (PINK)
COLLECTOR BOX DRAIN TUBE
(BLUE AND WHITE STRIPED)
COLLECTOR BOX
EXTENSION TUBE
CONDENSATE TRAP
INDUCER HOUSING DRAIN TUBE (VIOLET)
BURNER ENCLOSURE PRESSURE
REFERENCE TUBE ASSEMBLY BURNER ENCLOSURE PRESSURE
REFERENCE TUBE ASSEMBLY
BURNER ENCLOSURE
PRESSURE REFERENCE
TUBE ASSEMBLY
BURNER ENCLOSURE PRESSURE
REFERENCE TUBE ASSEMBLY
BURNER
ENCLOSURE
PRESSURE
REFERENCE
TUBE ASSEMBLY
BURNER
ENCLOSURE
PRESSURE
REFERENCE TUBE
ASSEMBLY
TUBE ROUTING
—7—