AERCO C-More Controls Manual June 2010 - Manual (Page 64)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
Page 64 of 162 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 04/22/14
GF-112 Phone: 800-526-0288 OMM-0032_0E
NOTE
Both the Delayed Interlock and the Remote Interlock must be in
the closed position to allow the unit to fire.
Remote Interlock In
The remote interlock circuit (REMOTE INTL’K IN) is provided to remotely start (enable) and stop
(disable) the boiler if desired. The circuit is 24 VAC and comes factory pre-wired closed (jumpered).
Delayed Interlock In
The delayed interlock circuit (DELAYED INTL’K IN) is typically used in conjunction with the auxiliary
relay described in paragraph 5.2.11. This interlock circuit is located in the purge section of the start
string. It can be connected to the proving device (end switch, flow switch etc.) of an auxiliary piece of
equipment started by the unit’s auxiliary relay. The delayed interlock must be closed for the unit to fire.
If the delayed interlock is connected to a proving device that requires time to close (make), a time
delay (Aux Start On Dly) that holds the start sequence of the unit long enough for a proving switch to
make can be programmed. Should the proving switch not prove within the programmed time frame,
the unit will shut down. The Aux Start On Dly can be programmed from 0 to 240 seconds. This option
is locate in the Configuration Menu.
5.2.14 Fault Relay
The fault relay is a single pole double throw (SPDT) relay having a normally open and normally
closed set of relay contacts that are rated for 5 amps at 120 VAC and 5 amps at 30 VDC, resistive
(2 Amps Inductive). The relay energizes when any fault condition occurs and remains energized
until the fault is cleared and the CLEAR button is depressed.
5.2.15 Auxiliary Relay Contacts
Each unit is equipped with a single pole double throw (SPDT) relay that is energized when there is a
demand for heat and de-energized after the demand for heat is satisfied. The relay is provided for
the control of auxiliary equipment, such as pumps and louvers, or can be used as a unit status
indictor (firing or not firing). Its contacts are rated for 120 VAC @ 5 amps resistive (2 Amps
Inductive). . Refer to Figure 5-1 to locate the AUX RELAY terminals for wiring connections.