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WIRING DIAGRAM
Models SHP-2 or DSL-600
Models 8555, 8537
EQUIPMENT
Reversing
Valve – Heat
Reversing
Valve – Cool
2nd Stage
W2
Emer. Heat
2nd Stage
Y2
Compressor
1st Stage
W1
Aux. Heat
1st Stage
Y1
Compressor
Fan
Relay
{hot}
{com}
FACTORY WIRING
24V FIELD WIRING
NOTE 1: Do not remove jumper unless using a
transformer different from system transformer
to power the thermostat.
NOTE 2: Thermostat will accept 24V DC. Connect pos. {+}
to 24V terminal and neg. {–} to 24V{c} terminal.
NOTE 3: Connect service light output from heat pump to LED2.
NOTE 4: Free relay for field use. Relay energizes during the night
event {partial moon shown on display}. {8555 only}
PRODUCT SPECIFICATIONS
Rated Voltage
Rated AC Current
Rated DC Current
Control Range
Thermostat Measurement Range
ODT Measurement Range
Control Accuracy
Minimum Deadband
Dimensions
Available Equipment Terminals
Minimum Wires Required
NOTE: These thermostats contain electronic circuitry in place of the conventional mechanical anticipator. Specifications are subject to change without notice.
P.O. BOX 1467 • MADISON, WI 53701-1467 • Call toll-free 1-800/334-6011 • FAX 608/257-4357 • Products For Better Indoor Air Quality
Form #5154 3.1.03
B
O
B
W2
Y2
O
W1
Y1
G
R
NOTE 1
24V
24V(c)
LED1
LED2
NOTE 3
RS2
G
RS1
RS+v
R
CLK1
C
CLK2
NO
COM
NC
20 to 30 Volts AC or DC, 24 Volts Nominal
.050 Amps to 0.75 Amps continuous per output with surges to 3 Amps maximum
0.0 Amps to 0.75 Amps continuous per output with surges to 3 Amps maximum
Heating: 38 to 88˚F in 1˚ steps {5 to 30˚C in 1˚ steps}
Cooling: 60 to 108˚F in 1˚ steps {16 to 40˚C in 1˚ steps}
28 to 124˚F {0 to 48˚C}
–50 to 124˚F {–48 to 48˚C}
±1˚F at 68˚ {0.5˚C at 20˚C}
{between heating and cooling set points} 2˚F {1˚C}
8555
1
4
1
8537
4
8555
24 Vac, 24 Vac{c}, W2, Y2, W1, Y1, G, O/B
8537
24 Vac, 24 Vac{c}, Y1, Y2, W1, G, O/B
8555
8
8537
7
®
Aprilaire
®
PerfectTemp
®
OUTPUT TERMINALS
Thermostat
Thermostat
W2
W1
Y2
Y1
G
R
NOTE 2
24V
24V{c} 24V {AC or DC} common from transformer
O
B
REMOTE
NC,
SENSOR{S}
COM,
NO
CLOCK
LED1, Completing a circuit from the hot side of
TERMINALS
LED2
RS1,
RS2,
RS+v
CLK1, A completed circuit between these two
CLK2
/
"H x 5"W x 7/8"D {114mm x 127mm x 22mm}
2
/
"H x 4"W x 7/8"D {114mm x 102mm x 22mm}
2
2nd Stage Emergency Heat {8555 only}.
3rd Stage Heat {aux. heat} or 1st Stage Emerg.
Heat. Center LED lights when this terminal is
energized.
2nd Stage Cooling Compressor
1st Stage Cooling Compressor
Fan
24V hot – used with terminals above to complete
switched circuit.
24V {AC or DC} hot from transformer {positive if
DC voltage source is used}.
{negative if DC voltage source is used}.
Reversing Valve, Cooling – energizes in Cool mode.
Reversing Valve, Heating – energizes in Heat mode.
Single Pole Double Throw relay with default as
indicated. During the Night event {moon shows on
display}, the relay is energized {8555 only}.
the thermostat transformer {through a switch}
to either of these terminals illuminates the
appropriate LED located on top of the thermostat.
These terminals are used to connect Remote
Sensors {i.e. 8040, 8041}.
terminals automatically adjusts the set point
to the night setting in the current mode of
operation {8537 only}.
©Research Products Corporation 2003
™
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