Element
Section 8: Water Heater and AquaSolve Startup:
L-OMM-0003_A
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Table 10
– Interlock Terminal Functions
Terminal
Connections
Description
P1
– P2
Provides a 5 Amp contact closure to control remote equipment (e.g. mechanical
room air louvers, draft inducer or power vent, etc.). Do not directly energize
pumps or motors through these terminals. If operation or repositioning of the
remote equipment is required for safe operation of Elements, the remote
equipment must send a return proving signal to terminals C1-C2, via its proving
switch, to confirming proper operation or repositioning to enable Element units
to energize.
A1
– A2
Used to activate a remote alarm, signaling shutdown of combustion control.
Provides a maximum 2 Amp relay contact closure when the control system
terminates operation due to a tripped safety interlock (e.g, an air proving switch,
high limit switch or flame sensor, etc.).
C1
– C2
Used for proving operation of remote device. Terminals are wired to a proving
switch on a remote device such as a power venter, louvers or a combination of
these in series. When all remote proving switches close, the circuit from C1 to
C2 is completed and the Ele
ment’s controls are enabled. Elements ship from
the factory with an orange jumper between terminals C1 and C2 that must be
removed when a proving switch is connected.
R1
– R2
Used to activate / de-activate the water heater from remote master control.
When switching this low current circuit, a relay with gold plated contacts or the
use of two relay contacts in parallel must be used. Terminals are wired to a
relay in a remote Energy Management System. When the relay closes, the
circuit from R1 to R2 is compl
eted and the unit’s controls are enabled. The
Element ships from factory with a jumper between terminals. Remove orange
jumper when connecting to a remote controller.
