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Switch Setting
Adjust Switches
Both OFF
5 0N - 6 OFF
5 OFF - 6 ON
5 ON - 6 ON
Heat
Normal
Increase 15%
Decrease 15%
Normal
Cool
Normal
Increase 15%
Decrease 15%
Normal
Fan Speeds
Switch Setting
Heat Switches
Both OFF
3 0N - 4 OFF
3 OFF - 4 ON
3 ON - 4 ON
Fan Speeds
Heat
High
Med High
Med Low
Low
Switch Setting
Cool Switches
Both OFF
1 0N - 2 OFF
1 OFF - 2 ON
1 ON - 2 ON
Fan Speeds
Cool
High
Med High
Med Low
Low
Delay Switches are for future use - no function at this time
Note:
Refer to individual specification pages for Airflow
Performance specifications. Above settings correspond
to DIP switch settings on the ECM circuit board only.
Do not adjust DIP switches on MAIN Circuit Board.
T30
SW1
T29T28REDOGYWRCT25
T1
T21 T22 T23 T24
T2 T3
Line
AUX
1
AUX
2
Neutral
T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17
K3
COM
N.
O
K6
COM
N.O.
T26 T27 GRNYEL
P2 P3
F2 MAX 2 amp
F1
MAX
1
amp
R
24Vac12Vac Com
DET
C
Defrost
Freeze
Fan Hi
ON
P1
C4
C5
K8
VDR1
C1
CR1
TP1
8 7 6 5 4 3 2 1
T31
Cont
a
N.0. CO
M
Digital Controls
DIP SWITCHES TO BE
ADJUSTED BY QUALIFIED
TECHNICIANS ONLY.
RWYG
A/C Unit
Thermostat
To “Y”
To “C”
Standard 24 Volt
Thermostat
Connection
(Thermostats are not avail-
able through Nutech)
Basic Functions
• Thermostat fan switch will control low speed fan
operation
• Call for heating - high speed
• Call for cooling - high speed
Function and Controls ECM Motor
ECM Motor DIP Switch Settings
Do not energize the CAF until the plumbing is
connected and commissioned. Failure to do so
will damage the pump.
WARNING
DIP switches #6 & #7 must be ON for the ECM
motor to function (factory setting).
ATTENTION
ECM Motor DIP Switch Settings
(DIP 6&7 ON is Factory Setting)
ON
8 7 6 5 4 3 2 1
DIP #2 to ON will disable the
Off Season Circulation Timer
Factory Setting
Do not adjust any other DIP switches than
indicated above.
WARNING
COOL
1234 5678
HEAT
ADJUST DELAY
COOL HEAT
ADJUST DELAY
SW1
off on
T2
T1
Thermostat Heat Anticipator Settings
Mechanical Thermostats - start at .5 amp and may need to be
increased depending upon the residual heat left in the hydron-
ic coil and duct work.
Electronic Thermostats - to be set on electric style heat.