ION SYST0101CW Installation Instructions Manual page 13

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4.6.1. Bypass Humidifier

A bypass humidifier should be wired directly to the furnace or fan coil HUM and 24VAC COM

terminals. The Ion System Control will automatically energize the HUM output during a call for

humidification.

4.6.2. Fan Powered Humidifiers

Most fan powered humidifiers produce internal 24VAC in order to energize upon a switch or

contact closure. For this application, a 24VAC N.O. Isolation Relay (DPST) MUST be used to

prevent mixing the internal humidifier power with the indoor equipment transformer. Applying

24VAC isolation relay coil to furnace or fan coil HUM and COM terminals will allow the Ion

System Control to automatically energize the HUM output during a call for humidification. The

N.O. relay contacts will be used to energize the humidifier. See Fan Powered Humidifier

installation instructions for more details.

5. Commissioning

This section addresses initial power up (or commissioning) of a new Ion System Control. The

control will communicate and identify all components in the Ion System. The following is a

typical example for an ICP communicating variable-speed furnace / fan coil with a 2-stage

air-conditioner / heat pump (including dual fuel system). The process may vary for other types

of systems. See the ICP communicating HVAC equipment Installation Instructions for more

details, as provided.

5.1. Searching for Indoor Unit

The Ion System Control will light up and display the Ion System logo and then begin the

commissioning process by displaying "Searching for indoor unit".

NOTE: If the Ion System-compatible indoor equipment (package unit indoor section, gas

furnace or fan coil) cannot be found, the control will display "Indoor unit not found". This

MUST be corrected before the initial power up sequence can continue, proceeding to the next

section, "Searching for outdoor unit." If it is not corrected, the Ion System Control will go into

its DEMO operating mode. If a control is operating in Demo mode and you wish to install it

with equipment, navigate to the Installer menu and perform a re-install to re-learn the

equipment.

TIP: Troubleshoot communication bus problems by removing all but the indoor unit and

system control from the communication bus circuit. As each bus segment is verified, connect

the next component and continue to troubleshoot as required.