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
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)
Figure 11: Low side service port.
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
www.thermastor.com • sales@thermastor.com |