Toptech TT-N-411 - TT-N-411 Heat Pump System Wiring; TT-N-421 Multi-Stage Heat Pump Wiring; TT-N-421 Conventional System Wiring

MODEL TT-N-411: Single Stage Heat Pump System
Compressor
Control
cont.
Wiring Diagrams
9
Transformer Common
(See NOTE 1)
cont.
Wiring Diagrams
9
R O
Reversing Valve
(Active in Cooling
- See NOTE 3)
B Y1
G W2
Transformer Common
(See NOTE 1)
1st Stage
Compressor
Contact
Emergency
Heat Control
2nd Stage
Heat Control
Fan Control
24 VAC
See NOTE 2
MODEL TT-N-421: Multi-Stage Heat Pump Systems
NOTES: 1. Transformer common not required for battery-only operation of
thermostat. 2. Jumper is required to use Auxiliary Heat for both Second Stage and
Emergency Heat on units without separate Emergency Heat and Auxiliary Heat terminals.
3. For units requiring reversing valve to be energized during heating, connect reversing
valve to B terminal. For units requiring reversing valve to be energized during cooling,
connect reversing valve to O terminal.
Reversing Valve
(Active in Heating
- See NOTE 3)
C E/W1
(See NOTE)
Transformer Common
R Y1 E/W1 W2GO B C
1st Stage
Compressor
Control
1st Stage
Heat Control
Fan
Control
2nd Stage
Heat Control
24 VAC
Neutral
120 VAC
Hot
MODEL TT-N-421: Conventional Systems (Single Transformer)
NOTE: Transformer common not required for battery-only operation of thermostat.
10 11
B
Reversing
Valve (Active in
Cooling - See
NOTE 2)
O W
C
24 VAC
Reversing
Valve (Active in
Heating - See
NOTE 2)
Y G
Rc Rh
Factory Installed
Jumper
Fan
Control
Neutral
120 VAC
Hot
Neutral
120 VAC
Hot
NOTES: 1. Transformer common not required for battery-only operation of
thermostat. 2. For units requiring reversing valve to be energized during heating,
connect reversing valve to B terminal. For units requiring reversing valve to be
energized during cooling, connect reversing valve to O terminal.