8
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Evaporator coil frosted continuously, low dehumidifying
capacity.
1. Defrost thermostat loose or defective
2. Low refrigerant charge
3. Dirty air filters or airflow restricted.

7.3 Refrigerant Charging

WARNING: Only qualified service people should service this unit.
The Vehere has a high-pressure refrigerant system and high
voltage circuitry. This could present a hazard which could result
in death, serious bodily injury, and/or property damage. Only
qualified service people should service this unit.
If the refrigerant charge is lost due to service or a leak, a
new charge must be accurately weighed in. If any of the
old charge is left in the system, it must be removed before
weighing in the new charge. Refer to the unit nameplate
for the correct charge weight and refrigerant type. Add the
refrigerant through the low side service port. (See Fig. 11)

7.4 Blower Replacement

The blower has a PSC motor internal thermal overload
protection. If defective, the complete assembly must be
replaced.
1. Unplug the power cord.
2. Remove the cabinet front.
3. If an outlet duct is connected to the unit, remove it.
4. Disconnect the blower leads: white from the
compressor run capacitor, and black connected to the
fan switch.
5. Remove the nuts & bolts holding the blower outlet
flange to the cabinet end and remove the blower.
6. Reassembling with the new blower is the above
procedure reversed.

7.5 Low Pressure Control

If the low side refrigerant pressure drops to 15 PSIG, the
low pressure control opens and shuts off the compressor
and blower. It is automatically reset. It will close when the
refrigerant pressure rises to 35 PSIG. Its primary function
is to prevent damage to the compressor if a leak develops
in the refrigeration system. It may also open if the unit is
A) used in a cool area (below 50°F) and the defrost timer
is not adjusted or B) stored where it is below 40°F and
then started. Under these conditions, the unit will restart
within several minutes. Until the unit warms up, it may
cycle several times.

7.6 Relay

The contacts of the single pole, single throw relay
complete the power circuit to the compressor. The
contacts are closed when power is provided to the relay
coil via the control circuit. The control circuit includes the
humidity control, low pressure control, defrost thermostat
and timer.
8 Vehere Accessories
Part No. Item
4025283 Vehere Remote Humidity Sensor/Control
4022646 Indoor/Outdoor Relative Humidity Meter
4024934 Deluxe Indoor Relative Humidity Meter
4021749 Filter (2 Filters Required)
4023539 Collar, Duct, 12”, Galv. (intake)
4023603 Collar Assy, Duct, 12”, Galv. (exhaust)
Optional Ventilator
4019663 Quiet-Vent Exhaust Ventilator
Figure 11: Low side service port.