Raypak 88AR-398A, Инструкция по установке и эксплуатации

Страница: 39 / 68

39
Controls
Ignition Control Functions
When there is a call for heat, and all safeties are
closed, then the combustion air blower starts to purge
air from the combustion chamber. After the pre-purge,
the igniter is energized. The ignition module will lock-
out after failing to light 3 times during a call for heat. To
reset the lockout, press and release the RESET button
located on the user interface. The con- trol will auto-
matically reset after 1 hour. When in lockout the
control will run the blower through a post- purge cycle.
High Limit — Manual Reset
The heater is equipped with a fixed-setting manual-
reset high limit temperature device as standard, set at
200ºF, and it may have an additional optional
adjustable manual reset high temperature device.
Standard
The fixed-setting manual-reset high limit is built into
the PIM, and utilizes a dual element sensor located on
the outlet. To reset a high limit lock-out, press and
release the RESET button located on the user inter-
face.
Optional
The optional adjustable-setting manual-reset high limit
is located behind the front panel. To reset a high limit
lockout, press the reset button on the adjustable man-
ual reset limit as well as the reset button located on the
user interface.
Flue Temperature Limit
The heater is equipped with a fixed-setting manual-
reset high limit temperature device on the vent, for use
with non-metallic vent material. The high temperature
limit is located inside the unit near the vent adapter.
The VERSA monitors the limit and displays any fault
associated with the limit on the user interface. To reset
the limit, access it and press down on the red button.
The unit is provided with a limit rated for PVC vent
material. A higher-rated limit is provided when using
DuraVent
®
polypropylene venting. The limit is
removed when using Category IV stainless steel vent-
ing.
NOTE: Ignition modules are common for all model
sizes. However, model-specific operating parame-
ters are defined by their respective ID cards.
Fig. 39: Flue Temperature Limit