Operation (CME)
5-4
Cold Start Procedure
The system has a patented, built-in electric HTF pre-heater, which will heat the HTF in
the heat exchanger without the burner being turned on. This device is unique to
DRYAIR equipment. It is not always necessary to use this device, but will make the unit
start more smoothly and reduce maintenance costs associated with “cold starts”. To
utilize the HTF preheater, follow the procedure below.
•
Confirm that the pump switch
figure 23
(9-1) and
the water heat switch
figure 23
(9-2) are in the
“Off” (down) position.
•
Position all four breakers
figure 24
(10-1) to the
“On” (up) position. This will automatically
energize the electric “cold start” circulation
heater.
•
Wait until the “supply temperature gauge”
figure
25
(11-1) reads between 80° F to 90° F (27° C to
32° C). The time required for the heat transfer
fluid in the heat exchanger to reach this
temperature will depend of the outdoor ambient
air temperature.
•
Toggle the pump switch
figure 23
(9-1) located on the control panel to the “On” (up)
position. Once the pump is turned on, the “cold
start” fluid pre-heater is automatically shut off.
•
With the pump on and the “supply” and “return”
isolation valves on the exterior of the heat
module in the closed position, the “HTF” will
circulate through the heat module’s internal
bypass system. This will supply warm “HTF” to
the combustion air and fuel preheat systems,
which tempers combustion air and fuel for
smooth burner start-up and operation.
Figure 23-600 GTS Control Panel
Figure 24-600 GTS Breaker Box
Summary of Contents for 600 GTS Series
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Page 47: ...Appendix 9 3 Electrical Schematics Figure 56 600 GTS sub 40 Electrical Schematic...
Page 48: ...Appendix 9 4 Figure 57 600 GTS Electrical Schematic...
Page 49: ...Appendix 9 5 Figure 58 HR2250 Electrical Schematic...
Page 50: ...Appendix 9 6 Figure 59 Trailer Wiring Schematic...
