Controls - Rheem Raypak Hi Delta H Series Installation & Operating Instructions Manual

m. The configured heat-up delay takes place to
allow the HSI element to reach ignition tem-
perature.
n. The "Gas Valve 3" output (from Secondary
PIM) is energized for the trial for-ignition time
to light the burner.
o. The HSI is de-energized during the last sec-
ond of the trial-for-ignition period to sense for
the burner flame.
p. The flame sense is checked for successful
lighting of the burner. If a valid flame is detect-
ed, the main gas valve, operating pumps and
blower relay remain energized.
q. The Fourth Stage will be triggered by the
Secondary PIM using the second relay build
into the Secondary PIM hardware (J14- 2, 5).
r. When heat demand is reached Secondary
PIM will be required by the VERSA Control
Board to activate Gas Valve 4.
23. If flame is not detected during the trial-for-ignition
period by Primary or Secondary PIM, only the cor-
respondent gas valves outputs are disabled
immediately at the individual PIM with the ignition
failure.
24. The system will command the blower to go into a
post-purge if the no secured stages are active and
monitored by the remaining PIM. If Heat is still
required the remaining healthy PIM will take over
the demand.
25. If any safety is compromised the Primary PIM will
terminate the Interlock signal as a hardwire notifi-
cation of the failure. The lack of Interlock signal
will terminate any active stage monitored by the
Secondary PIM.
26. As a safety redundancy Primary PIM will commu-
nicate through the FT_BUS to the Secondary PIM
to terminate all active stages.
27. On single trial-for-ignition models, the PIM enters
ignition lockout and the LED on the PIM indicates
the fault code for ignition lockout. The VERSA IC
Display should also state Ignition Lockout.
On multi-trial-for-ignition models, the control goes
through an interpurge delay before additional ignition
attempts are started. If no flame is detected after the
final trial-for-ignition, the PIM enters ignition lockout
and the LED on the PIM indicates the fault code for
ignition lockout. The VERSA IC Display should also
state Ignition Lockout.
Freeze Protection
To enable freeze protection, DIP switch position 7 (on
the PIM) must be turned on (UP position). This is the
default position.
If the water temperature drops below 45˚F on the
Outlet or Inlet sensors, the Boiler pump is enabled.
The pump is turned off when both the Inlet and Outlet
temperatures rise above 50˚F.
If either the Outlet or Inlet temperature drops below
38°F, the VERSA starts the burner at the minimum fir-
ing rate. The burner cycle will terminate when both the
Inlet and Outlet temperatures rise above 42°F.

Controls

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.
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
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