Qnergy PowerGen 5650 Series, Installation & Operation Manual

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21. POWERGEN OPTIONAL FEATURE SETS
The PowerGen can be equipped from the factory with multiple different feature sets that can
increase utility of the unit. Contact your sales representative for more information on the
benefits of the features sets listed in this manual.
21.1 GLYCOL HEAT TRACE (GHT)
The GHT feature transfers recovered waste heat from the Stirling engine and exhaust to the
customer. A plate heat exchanger is used to separate between the engine coolant and the GHT
media. The GHT media is shuttled using a rotary vane pump on a AC variable speed motor.
The PowerGen monitors the supply and return temperatures of the GHT media and adjusts the
fans to match the heat load and meet the return temperature set point. If the GHT media is too
hot, the fans will increase speed to remove excess heat from the engine coolant. If the return
temperature is insufficient, the fan speed will reduce.
The GHT feature is fitted with a strainer for protecting the pump in addition there is a reservoir
tank that enables the media to expand, separates the air from the media and allows for easy
self-priming filling of the GHT circuit. Lastly, there is a media level sight glass and low level
switch that protects the pump from running dry and alerts the operator to add media.
The GHT feature can be disabled with the use of the Winter/summer toggle switch. It is
recommended to set to summer mode when no heat is required for extended periods of time.
Pump life and PowerGen efficiency is increased by doing so.
Pump speed can be adjusted manually using the speed dial. Qnergy provides a recommended
speed for each tube length so as to optimize performance and pump life. See Table 21-2 on
page 169 for more information.
Table 20-5 Local/Remote Selector Switch
Local/Remote Selector Switch
The Local/Remote selector switch determines if the control functions are controlled from
PowerGen panel or from customer controls via the FEB control board.
• ‘Local’ mode – PowerGen Stop/Stop (Reset) pushbutton is ACTIVE. Customer control
inputs are DISABLED
• ‘Remote’ mode – Customer remote control inputs are ACTIVE, PowerGen Start/Stop
(Reset) pushbutton is DISABLED