Therma-Stor Products Group HI-E Dry Vehere - Manual (Page 7)

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WARNING: Do not use open combustion heating appliances
(unless equipped with power exhaust) in a pool room equipped
with exhaust fans. Under certain conditions these exhaust fans
may cause the backdrafting of toxic combustion by-products
which are hazardous to human health and could cause death.
We strongly recommend using only closed combustion heating
appliances.
5.1 Ventilation Recommendations
Ventilation is an important element of pool and spa
dehumidification. A negative (exhaust) pressure ventilation
system should be used. This ventilation system is operated
and installed independently of the Vehere unit and keeps the
concentrations of corrosive pool chemicals to a minimum and
assists in keeping moisture from penetrating the rest of the
structure. Ventilation should be sized to all local codes. It is
best if the ventilation is a net negative in pressure.
6 Maintenance
6.1 Air Filter
The Vehere is equipped with two, 2” thick, pleated fabric
air filters that must be checked regularly. Operating the unit
with dirty filters will reduce the humidity controller’s capacity
and efficiency and may cause the compressor to cycle off
and on unnecessarily on the defrost control. The filters can
generally be vacuumed clean several times before needing
replacement. Replacement filters can be ordered from the
factory.
7 Service
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.
7.1 Technical Description
The Vehere uses a refrigeration system to remove heat
and moisture from incoming air, and add heat to the air
it discharges. Hot, high-pressure refrigerant gas is routed
from the compressor to the condenser coil. The refrigerant
is cooled and condensed by giving up its heat to the air it
discharges from the unit. The refrigerant liquid then passes
through two capillary tubes, which cause the refrigerant
pressure and temperature to drop. It next enters the
evaporator coil where it absorbs heat from the incoming air
and evaporates.
The evaporator operates in a flooded condition, which
means it should always be full of liquid refrigerant during
normal operation. A flooded evaporator should maintain
constant pressure and temperature across the entire coil,
from inlet to outlet. A mixture of gas and liquid refrigerant
enter the accumulator after leaving the evaporator coil.
The accumulator prevents any liquid refrigerant from
reaching the compressor. The compressor removes the cool
refrigerant gas from the accumulator and compresses it to a
high pressure and temperature to repeat the process.
7.2 Troubleshooting
No dehumidification, neither blower nor compressor run
with fan switch OFF.
1. Unit unplugged or no power to outlet.
2. Humidity control set too high or defective
3. Loose connection in internal wiring.
4. Open low pressure control
Dehumidification, blower runs continuously but compressor
only runs sporadically with fan switch OFF.
1. Unit is in defrost cycle
2. Defrost thermostat defective or loose
3. Loose connection in compressor circuit
4. Defective compressor overload
5. Defective compressor
6. Defective relay
No dehumidification. Blower runs but compressor does not
with fan switch OFF.
1. Bad connection in compressor circuit
2. Defective compressor capacitor
3. Defective compressor overload
4. Defective compressor
5. Defective relay
Blower does not run. Compressor runs briefly but cycles on
& off.
1. Loose connection in blower circuit
2. Obstruction prevents impeller rotation
3. Defective blower
Unit removes some water but not as much as expected.
1. Air temperature and/or humidity have dropped.
2. Humidity meter and/or thermometer used are out of
calibration.
3. Unit has entered defrost cycle
4. Air filter dirty
5. Defective defrost thermostat
6. Low refrigerant charge
7. Air leak such as loose cover.
8. Defective compressor
9. Restrictive ducting
Evaporator coil frosted continuously, low dehumidifying
capacity.