37
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 standard ignition module
will lock-out after failing to light 3 times during a call for
heat. To reset the lock-out, press and release the
RESET
button located on the user interface. The con-
trol will automatically reset after 1 hour. When in
lock-out the control will run the blower through a post-
purge cycle.
The single-try ignition module (part of the CSD-1
option) will attempt to light only one time before lock-
out occurs. To reset the lock-out, press and relase the
RESET
button located on the user interface.
Turning off the power to the heater WILL NOT reset
the single-try ignition module.
High Limit—Manual Reset
This heater is equipped with a fixed setting manual re-
set high limit temperature device as standard. It may
also have an additional optional adjustable manual
reset high temperature device.
Standard
The fixed setting manual reset high limit is built into the
PIM™, it utilizes a dual element sensor located on the
outlet (see Fig. 38). To reset a high limit lock-out, press
and release the RESET button located on the user
interface.
Storage
Components should be stored in a clean, dry environ-
ment in their original packaging. Non-UV stabilized
plastic components must be protected from prolonged
exposure to UV light.
Appliance Start-Up
Once polypropylene installation is complete, the heat-
ing system and flue should be commissioned following
Raypak’s instructions. There is no cure time or wait
time required.
Controls
WARNING:
Verify that vent pipes are adequately
and securely supported; the vent weight must not be
supported by the heater; this may cause
unwarrantable damage.
WARNING:
Installation, adjustment and service of
heater controls, including timing of various operating
functions, must be performed by a qualified installer,
service agency or the gas supplier. Failure to do so
may result in control damage, heater malfunction,
property damage, personal injury, or death.
WARNING:
Turn off the power to the heater before
installation, adjustment or service of any heater
controls. Failure to do so may result in board
damage, heater malfunction, property damage,
personal injury, or death.
CAUTION:
This appliance has provisions to be
connected to more than one supply source. To
reduce the risk of electric shock, disconnect all such
connections before servicing.
CAUTION:
Risk of electric shock: More than one
disconnect switch may be required to de-energize
the equipment before servicing.
Fig. 31: Centrotherm Polypropylene Vent Adapter
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