13MHGRVX-B2 Module Technical Guide
OPERATION MODES
Additional Features
Additional Features
Reheat Coil Flush
To assure positive oil return to the compressor, the Hot Gas Reheat
Coil will be ushed of liquid refrigerant by moving the Modulating
Gas Reheat Valve to its maximum position for a short interval.
Cooling Flush
If the unit is in Cooling Mode, a ush will occur when the unit’s
ush cooling interval timer has elapsed. The time is accumulated
whenever it is in cooling mode and resets after each ush cycle. The
ush cooling interval timer is a setpoint that is congurable using
the keypad and display (0 to 120 minutes in 10 minute increments).
Reheat Mode Flush
If the unit is in Dehumidication Mode and the valve is below 70%
for the ush reheat interval timer value, a ush will occur. If the
valve goes above 70%, the timer is reset. The ush reheat interval
timer is a setpoint that is congurable using the keypad and display
(0 to 120 minutes in 10 minute increments).
Condenser Coil Flush
If Condenser Coil Flush is configured and the unit is in
Dehumidication Mode and the reheat valve is above 70% for the
ush reheat interval timer value, a condenser ush will occur. This
shares the timer with the reheat ush so if the valve is below 70%
a Reheat Flush would occur.
Optional Second Stage Reheat
On larger systems, where more hot gas reheat capacity may be
required, a two-position Hot Gas Reheat Valve can be connected to
the MHGRVX-B2 to be used in conjunction with the Modulating
Hot Gas Reheat Valve. Any time the reheat demand moves above
the Modulating Hot Gas Reheat Valve capacity, this two-position
valve would be energized to supply additional hot gas to the Hot Gas
Reheat Coil. As the reheat demand is satised, the MHGRVX-B2
will de-energize the two-position valve and control reheat with the
Modulating Hot Gas Reheat Valve.
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