Dectron DS Series – Outdoor OMM 28 September 2020
Outdoor Air Condenser and Fluid Cooler Operation.
Based on the type of the outdoor condenser or fluid cooler fans’ type (two-speed fans or EC-type/modulating
fans), respective signal(s) are sent by control system to engage said fan(s): for two-speed fans - on/off signals
(switching speeds, based on compressor head pressure level), for EC-type fans - variable 0-10VDC signal
(proportional to the compressor head pressure level). Refer to the fans’ type and wiring diagram if/when needed.
If the fluid cooler is equipped with the built-in pump package (to establish cooling fluid flow between dehumidifier
and the fluid cooler or to serve as additional/booster pump), the said pump is also engaged along with fluid cooler
fans – pump would stay engaged while fans are engaged (regardless of the fans’ speed).
Space Heating
When premise air temperature drops below the set point, the dehumidifier control system issues a call for Space
Heating Mode and engages space heater (electric heater, hot water coil with valve, gas boiler etc.) by sending space
heating signal, respective to space heater control type - on/off, variable (0-10VDC), etc.
Gas Boiler Package, one of the available space heating options, is a closed-loop water/glycol heating circuit, that
consists of a hot water coil, instantaneous gas boiler, pump and mixing 3-way valve. Boiler package piping general
schematic is shown on Pic. E.2-B (depending on required capacity, boiler package could be single or double (as shown
on picture)):
• The pump is engaged and maintains constant water flow whenever space heating call exists. The mixing
valve responds to the space heating call – the more heat is needed the hotter water is diverted towards the
space heating coil. Boiler is controlled and operated via its own control system, responding to proper gas
pressure, water flow, and will supply glycol at a constant temperature.
To Next Page
Loading...
Need help?
General
