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TROUBLE SHOOTING TESTS (4-Pipe System)
Voltage:
When using a voltmeter across "Black" and "Red" and
“Black” to “Orange”, voltage must be 24VAC.
To Check Continuity:
(Using a Voltmeter with all loads connected)
A)
When the thermostat is calling for Cooling, meter should read
24VAC from “Black” to “Yellow”. When cooling is deactivated,
meter should read 0VAC from “Black” to “Yellow”.
B)
When the thermostat is calling for Heating, meter should read
24VAC from “Black” to “White”. When heating is deactivated,
meter should read 0VAC from “Black” to “White”.
C)
When the thermostat is calling for High Fan, meter should read
24VAC from “Black” to “Violet”. When all fan speeds are turned
off, meter should read 0VAC from “Black” to “Violet”.
D)
When the thermostat is calling for Medium Fan, meter should read
24VAC from “Black” to “Blue”. When all fan speeds are turned off,
meter should read 0VAC from “Black” to “Blue”.
E)
When the thermostat is calling for Low Fan, meter should read
24VAC from “Black” to “Green”. When all fan speeds are turned
off, meter should read 0VAC from “Black” to “Green”.
2-PIPE FAN COIL INSTALLATION: (Bimetal Aquastat ONLY)
NOTE:
For Electronic Aquastat applications (RS models) use the
4-Pipe wiring ONLY.
Follow the instructions for a 4-pipe installation with the following
exceptions:
Old Thermostat
Function
Control Feed
Common
Water Valve
Aquastat Heat
Aquastat Cool
Low Fan
Medium Fan
High Fan
Cable Wire
Color
New Stat Wire
Function
Control Feed
Common
Load Feed (valve)
Aquastat Heat
Aquastat Cool
Low Fan
Medium Fan
High Fan
New Stat Wire
Color
Red
Black
Orange
White
Yellow
Green
Blue
Violet
Cable Wire Color
NOTE:
When the thermostat is programmed for 2 speed the High fan
wire will not be used. Also, when the thermostat is programmed for
single speed fan, only the low fan wire connection will be used. Isolate
any unused fan speed wires from the thermostat.
+3V
SB1
SB2
COM
SEN3
SEN2
REF
+3V
SB1
SB2
COM
+3V
SB1
SB2
COM
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◦
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3
9510-0712
Rev D 10-23-07
HEAT/AUT
O/COO
L
°F/°C
SETPOINT
AUTO
Check Cooling:
Press and hold the down button until the cool
symbol appears on the LCD. Within 4 seconds
the cool valve will be activated. For manual
changeover models place the system mode
switch in the cool or auto position.
Note:
Room temperature must be above
the Comfort Cooling Limit 65°F (18.5°C)
for cooling to become active.
Adjust setpoint as follows:
6.0°F or more ABOVE room temperature
3.0°F to 5.9°F ABOVE room temperature
0.4°F BELOW to 2.9°F ABOVE room temperature
1.9°F to 0.4°F BELOW room temperature
2.0°F BELOW room temperature (cool threshold)
Heating Currently Active
FUNCTION CHART
MED
Lo
Hi Med
Lo
Med Med
Lo Med
Lo
Off Med
Lo Med
HIGH
Hi
Hi
Hi
Hi
Hi
Lo
On
On
On
Off
Reset Set
LOW
AUTO
COOL
HEAT
FAN SPEED
SYSTEM
Lo
Adjust setpoint as follows:
2.0°F ABOVE room temperature
1.9°F ABOVE to 1.9°F BELOW room temperature
2.0°F BELOW room temperature
Heating or Cooling Not Currently Active
MED
Lo
Lo Med
Lo
Off Med
Lo Med
HIGH
Hi
Hi
Hi
Set
Off Off
Set
LOW
AUTO
COOL
HEAT
FAN SPEED
SYSTEM
Lo
Adjust setpoint as follows:
2.0°F ABOVE room temperature (heat threshold)
1.9°F to 0.4°F ABOVE room temperature
0.4°F ABOVE to 2.9°F BELOW room temperature
3.0°F down to 5.9°F BELOW room temperature
6.0°F or more BELOW room temperature
Cooling Currently Active
MED
Lo
Lo Med
Lo
Off Med
Lo Med
Lo
Med Med
Lo Med
HIGH
Hi
Hi
Hi
Hi
Hi
Hi
Set Reset
Off
On
On
On
LOW
AUTO
COOL
HEAT
FAN SPEED
SYSTEM
Lo
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SEN3
SEN2
REF
+3V
SB1
SB2
COM
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◦
Red
Wiring Diagram 2-pipe
Fan Coil with 3 Speed Fan
24VAC
Black
Green LOW
Blue MEDIUM
Violet HIGH
Orange
Yellow
White
Fan
Valve
Common
Feed
Aquastat (mounted on water
supply line) or season change
switch
Red
Wiring Diagram 2-pipe
Fan Coil with 2 Speed Fan
24VAC
Black
Green LOW
Blue MEDIUM
Violet NOT USED
Orange
Yellow
White
Fan
Valve
Common
Feed
Aquastat (mounted on water
supply line) or season change
switch
