Bryant 987MB Installation, Start-Up, Operating And Service And Maintenance Instructions page 52

987MB: Installation, Start-up, Operating and Service and Maintenance Instructions
NOTE: If SW4-1 is turned ON position, the furnace control will NOT communicate with a communicating system wall control.
Prime Condensate Trap with Water
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow these warnings could result in personal injury or
death.
Failure to use a properly configured trap or NOT water-priming trap
before operating furnace may allow positive pressure vent gases to
enter the structure through drain tube. Vent gases contain carbon
monoxide which is tasteless and odorless.
CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in intermittent unit operation
or performance satisfaction.
Condensate trap must be PRIMED or proper draining may not occur.
The condensate trap has two internal chambers which can ONLY be
primed by pouring water into the inducer drain side of condensate trap.
1. Remove upper and middle collector box drain plugs opposite of the
condensate trap. See Fig. 61.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 60 – Furnace Setup Switches and Description
2. Connect field-supplied 5/8-in. (16 mm) ID tube with attached
3. Pour one quart (liter) of water into funnel/tube. Water should run
52
Fig. 61 – Priming Condensate Trap
(Appearance May Vary)
funnel to upper collector box drain connection, see
through collector box, overfill condensate trap, and flow into open
field drain.
A200365
A11392
Fig. 61.