User's Manual

Figure 5. Heat pump system wiring
Jumper Settings for ELECTH-HPUMP and HE-HG
There are 6 jumpered pins on the thermostat circuit
board that identify whether your system is:
- Gas or electric heater
- Non-heat pump or heat pump system
You must ensure that these pins are set correctly for
your system. The pin location is shown in the following
diagram which is located at back side of ZTS-110.
7 8
Wiring
- Be sure the operation mode is OFF
and Fan selection is Fan Auto
- Wire the proper cables at the terminal
block according to the circuit diagram
- Afterward, push all cables back into
the wall
- Do not use metal conduit or of cable
provided with a metal sheath
- Recommends adding fuse or
protective device in the line circuit
Important!
If you will be powering the ZTS-110 with 24Vac:
Connect the "24Vac Common" (typically the black wire/terminal) and "24Vac
Power" (typically the Red wire/terminal) from the HVAC system to the ZTS-110
HVAC System terminal block "C" and "RH" or "RC" terminals (see the following
explanation, these may be jumpered together).
Common or Split Transformer Systems:
Most HVAC systems have a common heating and cooling transformer. You must
insert a jumper wire to tie the RH and RC inputs together for this configuration. If
you have a system with separate heating and cooling transformers, do not insert a
jumper wire between RC and RH.
When wiring split systems, wire the heating systems "24Vac Power" (red wire) to
the ZTS-110 "RH" terminal, and wire the cooling systems "24Vac Power" to the
ZTS-110 "RC" terminal. Also wire the cooling systems "24Vac Common" to the
ZTS-110 "C" terminals.
Note: Do not split RC/RH for Heat Pump systems!
Figure 4. Non-heat pump (Standard Gas or Electric) HVAC system wiring
Terminals
Cool changeover (heat pump)
Heat changeover (heat pump)
2nd Stage heater
1st Stage heater
Fan
Compressor
24Vac Common
24Vac Power for Cooling
24Vac Power for Heating
Symbol
O
B
W2
W1
G
Y
RC
RH
C
Standard HVAC System
nd
W2 - 2 stage heater
st
W1 - 1 stage heater
G - Fan
Y - Compressor
R - 24Vac Power
C - 24Vac Common
O
B
W2
W1
G
Y
RC
RH
C
Brown
White
Green
Yellow
Red
Black
Heat Pump HVAC System
O - Cool changeover (heat pump)
B - Heat changeover (heat pump)
nd
W2 - 2 stage heater
G - Fan
Y - Compressor
R - 24Vac Power
C - 24Vac Common
O
B
W2
W1
G
Y
RC
RH
C
Brown
Green
Yellow
Red
Black
Blue
Orange
Set to HG for Gas heat-fan controlled unit (Default)
Fan will maintain off state.
Set to HE for Electrical heat-fan controlled unit
Fan will be turned on when there is heating output.
HG
HE
HG
HE
Note:
The HE and HG jumper controls the Fan when set to Auto in heating mode.
If user selects Fan ON at thermostat, the Fan will be turned on without considering the
HE-HG jumper selection.
Jumper Function Description
Set to ELECTH for non-heat pump system (Default)
- When there is a heating request, thermostat will turn on W1
- When there is a cooling request, thermostat will turn on Y
Set to HPUMP for heat pump system
- When there is a heating request, thermostat will turn on Y and B
- When there is a cooling request, thermostat will turn on Y and O
ELECTH
HPUMP
ELECTH
HPUMP