Perma Pure MDH-Series - Manual (Page 2)

If condensation forms in the unit:
- Decrease or stop sample flow and increase
purge flow until unit dries out
If unit does not heat:
- Check wiring connections
- Confirm power source is operating
(Refer to Figure 1)
1. Connect the 2 wires to a 110 VAC power
source and let the unit heat for 15 minutes
2. Secure sample inlet and outlet connections
using insulated fitting for sample inlet
3. Connect purge inlet and outlet fittings
4. Start purge flow(purge air must be -40°C dew
point air, nitrogen or other gas)
5. Start sample flow. Sample must be maintained
at constant temperature from its origin to
prevent condensation
WARNING
Do not obstruct vent holes
INSTALLATION GUIDELINES
TROUBLESHOOTING
When installing MDH-Series gas dryers, the following
rules apply:
- Sample pressure higher or equal to purge pressure
- Sample gas pressure not to exceed 80 psig and 10
psig for purge gas
- Purge air of -40°C dew point at a flow rate of 15
times sample flow
- Purge air must flow countercurrent to sample
Model Number: MDH-110-96F-4
Nafion Tube OD/ID: 0.108"/0.086"
Length: 96 inches
Nafion Dryer Housing: Fluorocarbon
Enclosure: Polycarbonate
Thermostat Set Point: 80° C
Power Requirements: 110 VAC, 0.3 Amps,
30 Watts
Figure 1
SETUP
HEX NUT
HEX NUT
Model Numbers:
MDH-070-48F-410,
MDH-070-48F-412
MDH-070-72F-410, MDH-070-72F-412
MDH-070-96F-410, MDH-070-96F-412
MDH-110-48F-410, MDH-110-48F-412
MDH-110-72F-410, MDH-110-72F-412
MDH-110-96F-410, MDH-110-96F-412
Nafion Tube OD/ID: 0.108"/0.086"
Length: 96 inches
Nafion Dryer Housing: Fluorocarbon
Enclosure: Polycarbonate
Thermostat Set Point: 80° C
Power Requirements: 30 watts,
110 VAC, 0.3 A,
or 12 VDC, 2.5 Amps.
1. Connect the 2 wires to the appropriate 110
VAC or 12 VDC power source and let the unit
heat for 15 minutes.
rev. 9/2012
48-96 inches depending on dryer