base
A
17
IOM74 November 2020 R105
TEMPERATURE CONTROL
The base is a discharge air temperature controller. Changing of either the setpoint or the setpoint range
requires connection to a laptop or similar device.
There are a number of methods to change, or ‘reset’ the discharge temperature to what the space requires.
ROOM OR RETURN THERMOSTAT
The thermostat can output the demand signal into terminals W+/-. The demand signal modifies the discharge
temperature between the upper and lower maximum temperature values. Refer to the field wiring diagram
included with the appliance for wiring connections.
Mounting locations:
- Do not install on an exterior wall.
- Do not install near any heat source.
- Should not be installed near an air discharge opening.
- Should not be affected by direct sunlight.
- Must be open to air circulation around the thermostat.
2 STAGE ROOM THERMOSTAT
The thermostat may have independent contacts for heating, cooling, or both. A Belimo SGF24 (0-10Vdc) with a
calibrated temperature dial will be used to directly change the discharge temperature (W+/-) to the maximum
discharge setpoint when the heating contact closes.
REMOTE SETPOINT
A Belimo SGF24 (0-10Vdc) with a calibrated temperature dial may be used to directly change the discharge
temperature (W+/-).
BMS SETPOINT
This method uses a single 0-10Vdc input (W+/-) to modify the discharge temperature between the upper and
lower maximum temperature values.
ALARM RESET
To reset, press the Red Alarm Reset button on the corner of the base, or from the computer interface.
WIRING CONCERNS
For purposes of unit wiring to chassis in this manual, grounding and bonding reference the same thing and may
be used interchangeably. Shielded cables always include an uninsulated ground connection wire, called a
‘drain’ wire. This wire should be connected to ground only at one end, not both.
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