Specifications

3-15
JOHNSON CONTROLS
FORM 102.20-N1 (1109)
3
7. Using the signal generator, cycle the burner to
check capacity modulation. Observe valve/damper
actuator operation.
FIG. 3-19 – DAMPER ACTUATOR
8. Using the standard operating controls, cycle the
burner several times to assure proper sequencing
of start-up, ring, and capacity modulation, plus
operation of all safety and monitoring controls.
9. Test 180°F. high temperature safety by running
burner with airflow off or diverted. Burner
will shut down at 180°F. Turn air handler on as
quickly as possible to remove heat from the heat
exchanger.
10. Burner efciency testing should be done last. The
burner should be running at High Fire rate for 30
minutes before efciency testing is done.
11. Efciency at High Fire is pre-determined, but may
be checked by ue gas analysis at the entrance to
the ID Blower Housing Test Port. At High Fire
CO
2
should be between 8-1/2 and 10 %; 0
2
should
be between 7-1/2 and 4%. With these ranges, ef-
ciency is 80% plus or minus 2% (see Fig. 3-18).
12. Contact contractor, facilities manager or customer
to inform successful start-up has been complet-
ed.
In the unlikely event that adjustment
is required; it is done at High Fire and
must NOT retard Low Fire light-off.
Do not change set up of factory preset
air inlet dampers on Power Flame
burner.
Any questions should be directed to
your local Service ofce or Johnson
Controls Product Tech Support, before
contacting the burner manufacturer.
FIG. 3-20 – CONDENSATE DRAIN
Condensate Drain Arrangement
The YORK Solution Indirect Fired gas heat exchanger
has the potential to create highly acidic condensation,
particularly during extended operation at low capacity
or low ring rate conditions. To insure proper drainage
the following guidelines should be followed (See Fig.
3-21).
When constructing the condensate trap
for the heat exchanger drainage sys-
tem, make sure the trap is tall enough
to handle the Total Static Pressure of
the ID Blower at Low Fire times 2.
Example: TSP is 6” at Low Fire -
construct trap 12” tall (See Table in
Fig. 3-21).
LD12911
LD12909
Damper
Actuator

future reference for
actuator set up.