Manual# I27028 5-4 Rev. 2 – 11/22/2017
adjust the air flow, the pressure drop must be checked as the air moves through the
HoneyCombe
®
wheel. The left-hand gauge measures the pressure drop as the
process air moves through the desiccant wheel. The right-hand gauge measures
the pressure drop as the reactivation air moves through the desiccant wheel. The
greater the air flow, the greater the pressure drop, and the higher the reading on the
gauge.
3. The ideal pressure readings for both the process and reactivation pressure gauges
are shown on the flow diagram inside the electrical control panel. Record these
values prior to starting the unit. However, it should be noted, that depending on the
inlet temperature and volumes, pressure gage readings could be up to 0.25” wc
either side of the noted pressure readings.
4. Turn on the unit, using the circuit breaker. Set the Auto/Off/Manual switch to the
Manual position.
5. The damper for the reactivation air is located on the reactivation blower. Adjust this
damper to get the correct reading on the right-hand pressure gauge.
6. The damper for the process air stream is located on the process blower (rear of the
outlet blower plenum on R10 & R15). Adjust this damper to get the correct reading
on the left-hand pressure gauge.
5.4 ADJUSTING THE PROCESS BYPASS DAMPER (R15 ONLY)
1. The R15 has a process bypass damper. The R15 can dehumidify up to 15,000
scfm of process air. Most of the air passes through the dehumidifier, but some
passes around the wheel and is then blended with the dry air in the fan plenum.
2. The bypass damper is set in the factory. There should be no reason to adjust this
damper setting.
At no time should the damper ever be closed. This could
cause damage to the wheel and seals, as too high a volume
would be passed through the wheel.
5.5 FINAL CHECKS
Do not allow the unit to operate unattended until the following points have been checked:
• Secure electrical connections, including a good earth ground.
• Blower motors turning in correct direction.
• HoneyCombe
®
wheel rotating 8 rph.
• Ductwork connected and sealed. Reactivation outlet ductwork insulated, as
reactivation outlet temperature is near 120°F (R05/R10) and 130°F (R15) ±5°F.
• Reactivation damper and process damper set to achieve correct pressure drops
across wheel.
• Manual bypass damper (R15 only) set as described in text.
• After unit has stabilized, reactivation outlet temperature is near 120°F/130°F ±5°F,
and always above 110°F.
5.6 REACTING TO ALARMS
The operational status of the Munters unit is determined via indicating lights mounted on
a silkscreened label on the main control panel. Alarms will be annunciated by red,
illuminated, LEDs and warnings will be annunciated by yellow, illuminated, LEDs.
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