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NTC
NCP
PC TO L CONNECTION
CONVERTER
Figure 12. L Connection Converter
Connect the converter to either the NTC or the Network
Control Panel (NCP).
Control
Parameter Name
No
BLOCK 1 HEATING PARAMETERS
Heating Backup
A1.01
Setpoint
Stage 1 Heating
A1.02
Differential
Stage 2 Heating
A1.03
Differential
A1.04
Heating Deadband
Upper Stage Heating
A1.05
Latch Option
A1.06
Heating Stage−Up Timer
Heating Stage Down
A1.07
Timer
Occupied Warm−Up
A1.08
Delay
Heating Return Air Limit
A1.09
Option
Heating Return Air
A1.10
Lim- it
Heating Blower On
A1.11
Delay
Heating Blower Off
A1.12
Delay
HP Supp. Heat
A1.13
Lockout Temp.
Heat Pump Compr. Low
A1.14
Temp. Lockout
BLOCK 2 COOLING PARAMETERS
Cooling Backup
A2.01
Setpoint
A2.02
Y1 Cooling Differential
A2.03
Y2 Cooling Differential
A2.04
Y3 Cooling Differential
NTC
CONNECT FIELD−PROVIDED
PHONE CORD TO PHONE
JACK ON NTC OR NCP
PC
Table 10. NTC Controller Parameters
Control Value
Units
Min
Def
Max
40
70
95
Deg.F
0
0.5
3
Deg. F
0
1
3
Deg. F
1
1
3.75
Deg. F
0
0
1
Option
0
0
60
Min.
0
0
30
Min.
0
30
120
Min.
0
0
1
Option
60
85
100
Deg. F
0
0
60
Sec.
0
0
300
Sec.
20
40
60
Deg.F
−30
−30
50
Deg. F
40
75
95
Deg.F
0
0.5
4
Deg. F
0
1
4
Deg. F
0
1.5
4
Deg.F
Reset NTC Parameters to Default
Restore the NTC controller parameters to default settings
as follows:
1. Disconnect power to NTC (P176).
2. Move all DIP switches on the Unit Address DIP switch
to OFF.
3. Move all switches on the Configuration DIP switch,
except for switch 7, to OFF.
4. Connect controller power (P176). The heartbeat LED
will cycle red, green, and off.
5. Press the pushbutton; the heartbeat LED will display
red.
6. Wait until the LED cycles red, green, and off. Return
Unit Address and Configuration DIP switches to the
previous position.
7. Hold the pushbutton to reset controller to normal
operation.
Description
Backup heating setpoint. Used if the communications link is lost (after 5
mins.) A1.10 <=A2.01−A4.03
Stage 1 heating differential. A1.02<=A1.03
Stage 2 heating differential. A1.03>=A1.02
Heating stage deadband. A1.04 <=A4.03−A2.05
Option used to hold upper stage on until temperature reaches setpoint.
Optional timer used to call the upper demand if the lower stage runs for this
time. Disabled if set to "0".
Optional time delay that occurs before a lower stage turns off following a
higher stage termination.
The delay on OCP output for first heating demand in occupied period.
Heating return air limit option enable.
Return air temp. limit. Heating outputs off if return air temp. exceeds limit.
ECTO A1.09 must be set to 1 to enable this limit.
Length of time before the blower turns on after a heating demand.
The time the blower stays on after the heating demand is lost.
Outdoor temperature setpoint for lockout of supplemental heat on heat
pump units. Outdoor sensor required (RT17).
Heat pump low ambient compressor lockout temperature. A value of − 31°F
will disable the low ambient lockout function. Outdoor sensor required
(RT17).
Backup cooling setpoint. Used if the communications link is lost (after
5mins.) A2.01>= A1.01+A4.03
Y1 cooling differential. A2.02<= A2.03
Y2 cooling differential. A2.03>= A2.02 and <=A2.04
Y3 cooling differential. A2.04>= A2.04
Page 10
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