From the wire chart found above, assign, according to function, the
cable wire colors to the thermostat wire legend provided below. If this
is a new installation, record the cable wire colors in the thermostat
legend provided below.
Note:
There is no medium fan in the thermostat. The wire for the
medium fan needs to be tied off following standard procedures, unless
used as a neutral.
See Figure 1.
2-Pipe Fan Coil Installation:
Follow the instructions for a 4-Pipe installation with the following
exceptions.
NOTE:
Fan will cycle only with calls for heating or cooling.
Continuous fan is not available on 2-pipe systems.
Old thermostat
wire function
Power Feed
Load Feed
Common
Heat
Cool
Low Fan
Medium Fan
High Fan
Cable
wire color
New thermostat
wire function
Control Feed
Load Feed
Common
Heat
Cool
Low Fan
High Fan
New thermostat
wire color
Red
Orange
Gray
White
Yellow
Green
Yellow w/Red Stripe
Cable
wire color
(Continue on reverse side)
9510-0611 Rev -
9-27-05
Check Cooling:
Press and hold the down button until the
cool symbol appears on the LCD. Within
4 seconds the cool valve should be activated.
Note:
Room temperature must be above the
Comfort Conditioning Cooling Limit
65°F (18.5°C) for cooling to become active.
TROUBLE SHOOTING TESTS (4-Pipe System)
Voltage:
When using a voltmeter across "Gray" and "Red", the
voltage must be 24VAC.
To Check Continuity:
(Using a Voltmeter with all loads connected)
A)
When thermostat is calling for Cooling, meter should read
24VAC from "Gray" to "Yellow". When Cooling is deactivated,
meter should read 0VAC from "Gray" to "Yellow".
B)
When thermostat is calling for Heating, meter should read
24VAC from "Gray" to "White". When Heating is deactivated,
meter should read 0VAC from "Gray" to "White".
C)
When thermostat is calling for High fan, meter should read
24VAC from “Gray” to “Yellow w/Red Stripe”. When High fan is
deactivated, meter should read 0VAC from “Gray” to “Yellow
w/Red
Stripe”.
D)
When thermostat is calling for Low fan, meter should read
24VAC from “Gray” to “Green”. When Low fan is deactivated
meter should read 0VAC from “Gray” to “Green”.
Adjust setpoint as follows:
4°F (2°C) or more ABOVE room temperature
2°F to 4°F (1°C to 2°C) ABOVE room temperature
Within 0°F to 2°F (0°C to 1°C) of room temperature
2°F to 4°F (1°C to 2°C) BELOW room temperature
4°F (2°C) or more BELOW room temperature
Function Test:
HIGH
Lo
Hi
Hi
Lo
Lo
Hi
Lo
Hi
Lo
Lo
Hi
Lo
Hi
Hi
On
On
LOW
AUTO
COOL
HEAT
FAN SPEED
SYSTEM
On
On
Stop
(Dead band)*
*Deadband: Active on start-up or initial call for heating or cooling
Aquastat (mounted on water
supply line) or season change
switch
Wiring Diagram 2-pipe Fan Coil
Green LOW
White
Control
Feed
Red
Gray
Yellow w/red stripe HIGH
Yellow
Valve
24VAC Feed
Common
24VAC
Orange
High
Fan
Low
Fan
Note: Fan will cycle with
heat or cool only
Cool pipe
position
Hot pipe
position
Down
Button
Cool
Symbol
Change
Scale
°F/°C
Red
Control
Feed
Door Switch, Motion Detector Wiring Diagram 2-pipe Fan Coil
Green
Yellow COOL
White HEAT
Gray
Yellow w/red stripe
Orange
Valve
24VAC Feed
Common
24VAC
High
Fan
Low
Fan
Door switch or motion detector control relay
must have a minimum of 3A rating. In open
position fan and valves will be deactivated.
In closed position fan and valves will be
activated.
Aquastat (mounted on water supply line)
or season change switch
3
