johNSoN coNtroLS
3-16
ForM 102.20-N1 (1109)
Startup
BURNER
ASSY
ID
MOTOR
FLOW
PITCH
1
1
2
4
3
1
2
3
4
Foot
LD12912
Fig. 3-21 – gAS FuRnACE COndEnSAtE dRAin tRAP
Failure to follow these guidelines may
cause excessive condensation build up
resulting in water damage to the facil-
ity and/or a cracked heat exchanger.
1. Observe local jurisdiction codes for gravity con-
densate drainage requirements.
2. Be sure the air handler is installed at an elevation
that enables proper condensate drainage and trap-
ping dimensions as provided in Fig. 3-21. Mini-
mum trap dimensions MUST be accommodated.
3. Condensate drain line size must be the full line size
of the heat exchanger drain connection.
4. Drain lines, fittings and supports should conform
to local codes and be suitable for the application.
5. Condensate drain and trap discharge should be
pitched away from the equipment at a slope of 1/4”
per linear foot or as local code dictates.
6. For outdoor or unconditioned space installations
local climate may dictate the need to heat trace
and/or insulate the exposed drain lines and trap.
Frozen drain lines and/or trap will cause build up
of condensate inside the heat exchanger resulting
in leakage and damage to the air handler and pos-
sibly to the facility.
7. Provide unions in drain lines to allow removal of
trap for periodic cleaning of drain lines as well
as the trap. When the burner is operated at low
capacity for extended periods, more condensate
is generated and with it deposits of solids in the
condensate drainage system.
8. Provide the ability to prime the trap. During initial
and seasonal start up, trap inspection and priming
is required. Condensate in the trap will evaporate
during long periods of non-use.
Summary of Contents for YORK SOLUTION LD09624
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