ED 15103-6 • MICROTECH III WSHP UNIT CONTROLLER 50 www.DaikinApplied.com
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Table 23:
Bit Description for Enfinity Large Two Compressor (Models CCH/CCW and LVC/LVW)
Bit
Number
Bit Description
Setting
Description
Unit Controller Jumpers
0
Normal/Test Mode
Jumper 1 = Open (0)
Normal operation
Jumper 1 = Shorted (1)
Service/Test mode operation
1
Fan Operation
Jumper 2 = Open (0)
Continuous fan operation
Jumper 2 = Shorted (1)
Cycling fan operation
2
Loop Fluid
Jumper 3 = Open (0)
Water loop fluid
Jumper 3 = Shorted (1)
Glycol loop fluid
3
Freeze Fault Protection
Jumper 4 = Open (0)
LWT Freeze Fault Protection is disabled
Jumper 4 = Shorted (1)
LWT Freeze Fault Protection is enabled
4
Room Sensor Setpoint Adjust Range
Jumper 5 = Open (0)
Short range: -5º to +5º F (-2.78º to +2.78º C)
Jumper 5 = Shorted (1)
Long range: 55º to 95º F (12.78º to 35º C)
5
Thermostat/Room Sensor
Jumper 6 = Open (0)
Thermostat control
Jumper 6 = Shorted (1)
Room sensor control
6 & 7
Compressor Availability (2 Jumpers)
Jumper 7 = Open (0)
Both compressors are available for use
Jumper 8 = Open (0)
Jumper 7 = Shorted (1)
Lead compressor is available for use (lag compressor is off-line)
Jumper 8 = Open (0)
Jumper 7 = Open (0)
No compressors are available for use
Jumper 8 = Shorted (1)
Unit Controller Inputs
8
Compressor #1 Low Pressure Switch
Switch Closed (1)
Low Pressure Switch for compressor #1 is normal
Switch Open (0)
Low Pressure Switch for compressor #1 is in alarm
9
Compressor #1 High Pressure Switch
Switch Closed (1)
High Pressure Switch for compressor #1 is normal
Switch Open (0)
High Pressure Switch for compressor #1 is in alarm
10
Emergency Shutdown
Open (0)
Unit shuts down
11
Local Occupancy Switch
Switch Open (0)
Unoccupied
1
Switch Closed (1)
Occupied
12
Thermostat Heat Stage #3
(O – Terminal)
Switch Closed (1)
Third stage of thermostat heating is requested
13
Thermostat Fan Request
(G – Terminal)
Switch Closed (1)
Thermostat fan operation is requested
14
Thermostat
Cool Stage #1 / Cool Stage #2
(Y1 – Terminal)
Switch Closed (1)
First stage of thermostat cooling is requested
(unit has HGR option)
Second stage of thermostat cooling is requested
(unit does not have HGR option)
15
Thermostat
Cool Stage #2 / Cool Stage #3
(Y2 – Terminal)
Switch Closed (1)
Second stage of thermostat cooling is requested
(unit has HGR option)
Third stage of thermostat cooling is requested
unit does not have HGR option)
16
Thermostat Heat Stage #1
(W1 – Terminal)
Switch Closed (1)
First stage of thermostat heating is requested
17
Thermostat Heat Stage #2
W2 – Terminal)
Switch Closed (1)
Second stage of thermostat heating is requested
I/O Expansion Module Jumpers
18
Not Used
Jumper 1 = Open (0)
19
Not Used
Jumper 2 = Open (0)
20 & 21
Secondary Heating Options
(2 Jumpers)
Jumper 3 = Open (0)
None
Jumper 4 = Open (0)
Jumper 3 = Shorted (1)
Supplemental electric heat
Jumper 4 = Open (0)
Jumper 3 = Open (0)
Boilerless electric heat
Jumper 4 = Shorted (1)
Jumper 3 = Shorted (1)
Hydronic Heating
Jumper 4 = Shorted (1)
1. This switch is effective only when the network scheduling is not in use.