Overview
ClimaDry™ Whole House Dehumidification Overview Indoor Air Quality (IAQ) and Relative Humidity (RH)
are increasingly becoming design issues that must be addressed by selecting heating and cooling equipment with advanced capabilities. The ClimateMaster ClimaDry™ reheat option (patent pending) offers unique features unlike anything currently available today.
ClimateMaster’s ClimaDry reheat option is an innovative means of providing modulating reheat without the complication of refrigeration controls. ClimaDry is Hot Gas Generated Reheat, which utilizes one of the biggest advantages of a water source heat pump (WSHP), the transfer of energy through the loop piping system. ClimaDry simply diverts condenser water through a
ClimaDry Benefits
ClimaDry is like no other reheat option on the market. Proportional reheat is controlled to the desired leaving air temperature set point (factory set point of 72°F, [22°C}), no matter what the loop temperature is. Since dehumidification operation will occur under less than full load cooling conditions a good percentage of the time, it is important to have a reheat function that provides 100% reheat in the spring and fall when the loop is cool. Supply air temperature is field adjustable to +/- 3°F [+/- 1.7°C] for even greater flexibility with an optional potentiometer.
Competitors without ClimaDry typically use an on/off
A key benefit to ClimaDry is a simple and easy to troubleshoot refrigerant circuit. No switching valves or hard to diagnose leaky check valves are utilized. No unusual refrigerant pressures occur during the reheat mode. The ClimaDry refrigerant circuit is like every other ClimateMaster unit (without reheat), so everything the technician already knows applies to troubleshooting the ClimaDry refrigeration circuit. Plus, the water loop portion of the ClimaDry option is easy to understand and diagnose.
Features Include:
•Modulating reheat for precise control of supply air temperatures
•100% reheat (operates as a whole house dehumidifier)
•“Neutral” supply air temperature even at part load
•Supply air temperature adjustment, +/- 3°F
•Integrated factory supplied reheat controls – simply attach a humidistat or dehumidistat
•Microprocessor (DXM) controls standard
•Ultra simple refrigeration circuit
•All water system eliminates refrigeration circuit modifications (same refrigeration circuit as units without ClimaDry)
•Stable refrigeration pressures, even at low EWTs
•All components located inside the cabinet
•Moves heat of rejection from ground loop to supply air stream
Availability
ClimaDry is currently available on ClimateMaster residential Tranquility 27™ (TT) and Tranquility 20™ (TS) series units (vertical and horizontal units only).
ClimaDry Applications
With the ClimaDry option, return air from the space is conditioned by the
Dividing the latent capacity by 1,069 BTU/LB of water vapor at 80°F DB and 67°F WB [26.7°C DB and 19.4°C WB] moist air enthalpy, converts the amount of moisture removal to pounds per hour (multiply pounds per hour by 0.4536 to obtain kg/hr). Calculations are shown
in figure 1. Most ClimateMaster heat pumps have a
and latent loads should be calculated. If the unit will be used for space cooling, a unit with at least enough capacity to satisfy the building sensible load should be selected. If the latent cooling load is not satisfied by the selection, a larger unit with enough latent capacity will be required. The ClimaDry Option can be used for the additional moisture load. If the unit will be used for dehumidification purposes only, the latent capacity is
ClimaDry Whole House Dehumidification - ClimateMaster Geothermal Heat Pumps - Rev.: 18 April, 2008B