35
Table 9 - Glycol Percentage Setpoints
Switch 1
Position
Switch 2
Position
Glycol
Percentage
Leaving Water
Temperature
Alarm
Activation
Leaving Water
Temperature
Alarm
Deactivation
Off
Off
0%
35°F
40°F
Off
On
10%*
30°F
35°F
On
Off
20%
23°F
28°F
On
On
30%
15°F
20°F
*Setting not recommended. 20% or more glycol solution is required if ambient temperatures are expected
to fall below freezing or if the loop water temperature is below 50°F while operating in the heating mode.
Air Coil Temperature Alarm
The air coil low temperature alarm will
trigger if the air coil temperature drops below
30°F. The alarm will release when the coil
temperature increases to 35°F. This alarm
will disable the compressor but allow
operation of the supply fan.
Entering Water Temperature Alarm
The entering water temperature alarm is used
to prevent freezing in the waterside
economizer coil. Entering water temperature
is only monitored if a unit is ordered with a
waterside economizer coil. This temperature
sensor is wired to the Pioneer Silver
Expansion Board. If the entering water
temperature falls to 35°F, the waterside
economizer coil will be deactivated until the
entering water temperature rises above 40°F.
The supply fan and the compressor are
allowed to operate when this alarm is
activated.
Emergency Shutdown Alarm
The emergency shutdown input requires a
constant connection to either 24VAC or
24VAC common for normal operation. If the
24VAC or 24VAC common signal is
removed then the controller will enter
emergency shutdown mode. This alarm will
disable the compressor and the supply fan.
Lock Out Alarms
The following alarms will not automatically
reset themselves on the fault condition clears.
For these alarms to clear one of the following
two conditions must be met:
1) Controller is power cycled
2) Fault condition is corrected and the
compressor call is removed
Auxiliary Input Alarm
The auxiliary alarm will enable if the
compressor has been operational for at least
2 minutes and a dry contact has been made
between the “AUX” and “AUX IN” quick
disconnect terminals for 10 seconds. This
alarm will disable the compressor but allow
the supply fan to operate. If a secondary drain
pan is to be used, wire the secondary drain
pan overflow switch into the Auxiliary Input
Alarm.
High Condensate Level Alarm
The high condensate level alarm will enable
if the resistance between the condensate level
sensor and 24VAC common is less than
100kΩ for more than 30 seconds. This alarm
will disable both the compressor and the
supply fan.
Summary of Contents for ProFit WV Series
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