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www.DaikinApplied.com 49
ED 15103-6 • MICROTECH III WSHP UNIT CONTROLLER
Table 22: Bit Description for SmartSource Single and Two Stage Compressor (Models GSH/GSV, GTH/GTV and GCV),
Continued
Bit Number
Bit Description
Setting
Description
Unit Controller Jumpers
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 & 19
Unit controller software v6.1 and older:
Not used
Unit Controller v6.2 and newer:
Fan Row Select
Jumper 1 & Jumper 2
Fan row select for modes:
Fan Only/Hydronic Heating/Hydronic Cooling
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
(applies only to unit controller software v6.0 and newer)
Jumper 4 = Shorted (1)
22 & 23
Dehumidification/Cooling Options
(2 Jumpers)
Jumper 5 = Open (0)
None
Jumper 6 = Open (0)
Jumper 5 = Shorted (1)
Hot Gas/Water Reheat (HGR)
Jumper 6 = Open (0)
Jumper 5 = Open (0)
Hydronic Cooling (waterside economizer)
Jumper 6 = Shorted (1)
24
Not used
Jumper 7 = Open (0)
25
Compressor Capacity Option
Jumper 8 = Open (0)
Single stage capacity compressor
Jumper 8 = Shorted (1)
Dual stage capacity compressor
I/O Expansion Module Inputs
26
Thermostat Heat Stage #4
Switch Closed (1)
Fourth stage of thermostat heating is requested
27
Compressor High Capacity – High Pressure
Cutout Switch
Closed (1)
Compressor High Capacity – High Pressure Switch is normal
Open (0)
Compressor High Capacity – High Pressure Switch is in alarm
28
Humidistat Dehumidification /
Cooling Stage #1 Request
Closed (1)
HGR Dehumidification is requested (unit has HGR option)
First stage of cooling is requested (unit does not have HGR
option)
29 & 30
Fan Speed Lookup Table Row Select
Binary: 00 , 01, 10, 11
Fan speed duty cycle lookup table row selection as defined here:
Row Switch
00
A/4
01
B/3
10
C/2
11
D/1
31
Previous Unit Heat/Cool/Dehumid Mode
Provided by unit controller
Provides mode awareness in Fan Only state
(0=Heating, 1=Cooling or Dehumidification)
1. This switch is effective only when the network scheduling is not in use.
