5
1Installation
CONNECTION DESCRIPTION EXPECTED CONNECTIONS RATINGS
AUX_TC +
(YELLOW)
Thermocouple Input Pilot
Thermocouple.
A “TYPE K” thermocouple must be connected between
the “+” and “-” terminals and must not be electrically
connected to ground.
An uninterrupted connection using “TYPE K” thermocouple
wire is required for an accurate reading.
AUX_TC -
(RED)
Thermocouple Input. Negative
terminal of Auxiliary thermocouple.
High Fire/Main + Positive terminal
of the High Fire / Main valve
Solenoid valves must be connected between the “+” and “-”
terminals. The negative terminal is not directly connected to ground
so a common return wire for the High Fire, Low Fire and Pilot
valves cannot be used.
Maximum continu-
ous current is 2A. If
“Low Power” mode is
enabled, a peak load of
4A is permitted.
High Fire/Main - Negative terminal
of the High Fire / Main valve
Low Fire + Positive terminal
of the Low Fire valve
Solenoid valves must be connected between the “+” and “-”
terminals. The negative terminal is not directly connected to ground
so a common return wire for the High Fire, Low Fire and Pilot
valves cannot be used.
Low Fire - Negative terminal
of the Low Fire valve
Pilot + Positive terminal
of the Pilot valve
Solenoid valves must be connected between the “+” and “-”
terminals. The negative terminal is not directly connected to ground
so a common return wire for the High Fire, Low Fire and Pilot
valves cannot be used.
Pilot - Negative terminal
of the Pilot valve
Ion + Flame Detection Input.
Connected to a Flame-rod.
A Kanthal rod should be placed directly in the pilot ame and
connected to this input. The pilot assembly must be grounded for
the ame detection to function properly. Input is protected from
high voltage and can be connected in series with the high voltage
terminals of an external ignition coil, allowing a single ame-rod to
be used for both ignition and ame detection.
A 65VAC signal is ap-
plied to the ame rod.
The source impedance
is very high so there is
no danger of sparking.
Ion - Ground Ground return for ame detection. Must be connected to the
burner housing.
1.4 Terminal Description Continued...
