Dexon Canada Air Systems Inc
OWMDH Series Use Manual
Version 07.2019
Page 9
5. Connect the status board cable at TB3 inside blower heater as per field wiring diagrams in
section 8.
6. Supply appropriate heating element and control power circuits to TB7 and TB8 as shown in the
field wiring diagram. Note: status and power entry is generally at the base of the unit but may
also be on the side with the use of liquid tight fittings.
7. Power up the heating element circuit at TB8 first so the elements have power available if there
is a heat demand.
8. Power up the co
ntrol circuit. The green “Power On” LED on the status board and on the main
controller PCB should light up. A yellow LED on the 95DH Main Controller will also light up to
indicate that a delay timer which overrides
the “Low Temp.” shut down feature has been
activated. This LED will continue to flash for the duration of the timed delay, approx. 7-8 minutes
(See Trouble Shooting Guide 6.1 for more information). This allows the blower heater to start in
cold conditions and will occur every time the unit is reset or powered up.
9. If there i
s a heat demand the “Element 1” LED on the status board should light up and should
only remain constant momentarily, then blink as it meets the demand. The element LED will go
out every time the demand is met, whether it be long intervals or short blinks. If there is no heat
demand then only the “Power On” LED should be lit.
10. If required perform function test as described below.
4.3 PERFORMANCE CHECK
NOTE:
You will require a means of cooling the temperature sensor to check the heating,
“Low Temp.”
and the “Fan Stopped” functions. We would suggest using ice water or a Dexon Temperature Simulator
(sold separately).
To create a demand with ice water; remove the temp. sensor from tubing (Fig.1) and place the sensor
in the ice water to create a heating demand and then place the sensor directly on ice to lower the
temperature to 0
°
C to create the “Low Temp.” shut down condition.
Temperature Sensor Tubing
Fig. 1
Содержание OWMDH Series
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Страница 24: ...Dexon Canada Air Systems Inc OWMDH Series Use Manual Version 07 2019 Page 23 8 4 FIELD WIRING ...