Venstar T1900 - Manual (Page 62)

1
2
3 st
nd
rd
Page 13.3
Output Matrix for Dual Fuel and
Three Stage Heat Applications
13
Dual Fuel Heat Pump with Balance
Point: Outdoor Temp > Balance
Point.
Non-Heat Pumps. Dual Fuel and
Balance Point options are
unavailable.
*RVR = Reversing Valve. RVR will be energized depending on this jumper
setting. See page 12.2 of this manual and page 5.4 of the Installation
Instructions for detailed programming information.
This table illustrates the outputs that will be energized on a call for
first, second and third stage heating, based on the programming in
setup steps 21 and 22 (see previous page) and the HP/GAS jumper
Heat Pump with three stages of
heat with Balance Point. Outdoor
Temp > Balance Point.
Dual Fuel Heat Pump with Balance
Point. Outdoor Temp < Balance
Point.
1
2
3 st
nd
rd
1
2
3 st
nd
rd
1
2
3 st
nd
rd
1
2
3 st
nd
rd
1
2
3 st
nd
rd
1
2
3 st
nd
rd
W1 W2 W3 G Y1
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
RVR
ST
DF = ON
BP = ON
HP = ON
DF = ON
BP = ON
HP = ON
Dual Fuel Heat Pump with
Balance Point set to ‘OF’.
DF = ON
BP = OFF
HP = ON
Dual Fuel Heat Pump with no
Outdoor Sensor (Outdoor Sensor
has failed).
DF = ON
BP = N/A
HP = ON
DF = OFF
BP = ON
HP = ON
DF = OFF
BP = ON
HP = ON
DF = N/A
BP = N/A
HP = OFF
Heat Pump with three stages of
heat with Balance Point. Outdoor
Temp < Balance Point.
ELEC/GAS
ELEC/GAS
ELEC/GAS
For example, in the first section of this matrix the thermostat has
been programmed to operate a Heat Pump Dual Fuel system based
on a Balance Point. The Outdoor Temp is warmer than the Balance
Point (Outdoor Temp > Balance Point). This means that 1st stage
heating will energize G and Y1, 2nd stage heating will energize W2
and 3rd stage heating (W3) is unavailable. The Reversing Valve
may, or may not be energized, depending on how it has been prog-
rammed (see note).
setting on page 12.2.
*ELEC/GAS = Electric Heat or Gas Heat. The fan will be energized depending
on this jumper setting. See page 12.3 of this manual and page 5.3 of the
Installation Instructions for detailed programming information.