Mixing Box - Greenheck IGX Installation, Operation And Maintenance Manual

Start-Up Instructions:
Optional Mixing Box
Control Options:
Night Setback requires field wiring from unit to the thermostat.
This options enables a make-up unit to operate in 100% return air mode at night (unoccupied periods) so
that a desired space temperature may be maintained at the lowest operational cost. During daytime
(occupied) hours, the unit operates as a 100% make-up air unit with furnace(s) controlled off a field
adjustable discharge temperature setting. This package includes a Deluxe Programmable Thermostat
with a time clock that enables the customer to program occupied and unoccupied operation periods.
Building Pressure Control requires field wiring from the unit to the factory
provided remote control panel.
This option enables outdoor air and return air dampers modulate to maintain the desired building
pressure. The building pressure set point is field adjustable using a photohelic gauge mounted on a
factory provided remote control panel.
Potentiometer Control requires field wiring from the unit to the factory provided
remote control panel.
This option enables manual control of the outdoor air and return air damper positions. Damper positions
are controlled with a potentiometer mounted on a remote control panel.

Mixing Box

Figure 5: Mixing Box with optional filters and dampers
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