Kutzner + Weber MUC, Руководство по установке

Страница: 21 / 28

MUC IOM
21 | P a g e
Operation - Modes
Back Up Mode
The MUC has an internal battery installed to provide power back up operation for 5 to
10 minutes in the event of input power loss. The MUC will enter the Back Up Mode if the
MUC was initially in the Run Mode providing at least 2VDC to the fan motor or if the
MUC was in the Fail Mode.
If either of these initial conditions were present at the start of the power loss event then
the MUC will enter a Back Up Mode by initiating an alarm condition thus driving both the
green and red LEDs to On. Audio buzzer override functionality is available as in Fail
Mode. A total loss of power will result in the gas relay and the damper relay going into
the normally open positions thus disabling the gas valve actuator and damper actuator.
If the MUC was in the Off Mode at the start of a power loss event, the MUC will not
enter Back Up Mode.
If the power loss event exceeds 10 minutes then the MUC will disable all functionality
and will be considered in Off Mode. When power is resumed the MUC will reestablish
the proper mode based upon the state of the control potentiometer and Enable input.
If the power loss event timer is not exceeded the MUC will enter back into the mode of
operation it was in prior to the power loss event depending upon the state of the control
potentiometer and Enable input.
The battery is 2) CR2032 Lithium-Manganese Dioxide Coin cells (3V 220mAH) to allow
easier user battery changeability. If the battery requires a change then the user will be
alerted via a flashing 50% duty cycle of the green LED (only in Run Mode). Battery
servicing is left to the user as the MUC has no battery charging capabilities.
To enable the back up
battery the 2 position jumper
needs to be put in the
battery enable position as
illustrated in figure 7. The
jumper should short the
middle pin with the top pin
marked “ON.”
Battery Tray
BATT
ON
Battery Enable Jumper
Select
OFF
2 Position Jumper
JUMPER
OFF
ON
Figure 7