Diagnostics - Re-Verber-Ray MP-25-80N Insert Manual

3.0 Operation • Sequence of Operation • Diagnostics
Shut-down:
When the thermostat is satisfied, the TP-3250 will de-energize the 120VAC power to the common side of
the pressure switch, de-energizing the thermostat circuit on the TP-351A. The blower motor will continue
to cycle for a period of 2 minutes for a post-purge cycle.
NOTE: Due to the PID Controller optimizing the output of the heater, the unit may run for a short period
after the call for heat has been satisfied.
For extended shut down periods:
Set external controller devices to off or lowest setting.
1
Turn OFF the 120VAC to the heater.
2
Turn OFF the manual shut-off valve in the heater's gas supply line.
3
Prior to start up after seasonal extended shut-down, an inspection of the heater must be performed by
4
trained gas installation and service personnel. This will ensure optimal operation and years of trouble-
free service.

Diagnostics

Lockout:
The controls will automatically lockout the heater system when an external or system fault occurs. There
are two types of lockout:
Soft Lockout: The heater will attempt to light three times. In the event of a failed ignition, (gas pressure,
valve, no flame sense etc.), the heater will enter a soft lockout period for 15 minutes and
then attempt to light three more times before entering a Hard Lockout mode.
Hard Lockout: If proof of flame is not established, a component failure occurs or blockages are evident,
the heater will enter hard lockout. If lockout occurs, the control can be reset by briefly
interrupting the power source. The control will not open the gas valve unless there is an
interruption by the user.
Figure 3.1 • Operational Indicator Lights (see Charts 3.1 through 3.3 for Operation & Diagnostic LEDs)
Amber Light (24V)
Indicates Gas Valve
Operation
HOT
120V
NEUTRAL
EARTH
- 120V HEATER INPUT -
Amber Light (120V)
Indicates Pressure
Switch Actuation
20
MP Series