ICM Controls SC900V General instructions

Installation, Operation & Application Guide
For more information on our complete range of American-made
products – plus wiring diagrams, troubleshooting tips and more,
visit us at www.icmcontrols.com
Auto Changeover
24-277 VAC Hardwire
SC900V
2 or 4 Pipe Fan Coil Thermostat, 3 Speed
•2-pipesystems
•4-pipesystems
•Pipesensorcompatible
•Congurable
•Largedisplaywithbacklight
•Selectablefahrenheitorcelsius
•Relayoutputs(minimumvoltagedropinthermostat)
•Remotesensorcompatible
Specifications
Electricalrating: 24-277 VAC, 6 amp maximum per output
Temperaturecontrolrange:45°F to 90°F (7°C to 32°C) Accuracy: ± 1°F (± 0.5°C)
Timing: Backlight Operation: 10 seconds
Terminations: L, N, Heat, Cool, FH, FM, FL, PS, RS, SB, SC
Package Contents/Tools Required
Packageincludes: SC900V thermostat on base, thermostat cover, wiring labels, screws and wall
anchors, Installation, Operation and Application Guide
Toolsrequiredforinstallation: Drill with 3/16” bit, hammer, screwdriver
1. Turn off power to the heating and cooling system by removing the fuse or switching the appropriate circuit breaker off.
2. Remove cover of old thermostat. This should expose the wires.
3. Label the existing wires with the enclosed wire labels before removing wires.
4. After labeling wires, remove wires from wire terminals or remove wire nuts.
5. Remove existing thermostat base from wall.
6. Refer to the following section for instructions on how to install this thermostat.
To Remove Existing Thermostat
ELECTRICALSHOCKHAZARD –TurnoffpoweratthemainservicepanelbyremovingthefuseorswitchingtheappropriatecircuitbreakertotheOFFpositionbeforeremovingtheexisting
thermostat.
Important Safety Information
WARNING! : Alwaysturnoffpoweratthemainpowersupplybeforeinstalling,cleaning,
orremovingthermostat.
• This thermostat is for 24-277 VAC applications only; do not use on voltages over 277 VAC
• Use this thermostat only as described in this manual
ELECTRICALSHOCKHAZARD –Turnoffpoweratthemainservicepanelbyremoving
thefuseorswitchingtheappropriatecircuitbreakertotheOFFpositionbeforeworking
onahighvoltagethermostat.
Wire Designator Descriptions
L – 120 VAC Hot Black
N – 120 VAC Neutral White
H – Heat Red
C – Cool Blue
FH – Fan High Purple
FM – Fan Medium Yellow
FL – Fan Low Gray
PS – Pipe Sensor (optional) Orange/White
RS – Remote Sensor (optional) Red/White
SB – Set Back (optional) White/Black
SC – Set Back/Sensor Common Blue/White
Configuration Mode
The conguration mode is used to set the SC900V to match your heating/cooling system.
To congure the SC900V, perform the following steps:
1. Verify the SC900V is in the OFF mode. Press the SYS (left) button until off mode displays.
2. Press the PROGbutton for 5 seconds while the SC900V is in OFFmode.
Press the up or down button to change settings within each screen.
Press the PROG button to advance to the next screen.
Note: Pressing the SYS button will return you to the previous screen.
To exit conguration mode, press the PROG switch for 5 seconds. FAN
SYS
PROG
Down
button
Up
button
Icon Descriptions
Cooling operation icon
Heating operation icon
COOLHEAT
Fan
Auto
Fan
operation
icon
Wiring Diagrams
System1
HeatOnly
N
H
C
FH
FM
FL
PS
SB
SC
RS
L
Remote Sensor
Pipe Sensor
Set Back
Fan High
Heat
Fan Low
(Optional)
(Optional)
(Optional)
Purple
Yellow
Gray
Orange/White
Red/White
White/Black
Blue/White
Blue/White
Blue/White
Blue/White
Blue/WhiteBlue/White
Blue/White
Red
White
Black
24-277
VAC
Fan Medium
System2
CoolOnly
N
H
C
FH
FM
FL
PS
SB
SC
RS
L
Remote Sensor
Pipe Sensor
Set Back
Fan High
Cool
Fan Low
(Optional)
(Optional)
(Optional)
Purple
Yellow
Gray
Orange/White
Red/White
White/Black
Blue
White
Black
24-277
VAC
Fan Medium
System3
2-PipeManualChangeover
N
H
C
FH
FM
FL
PS
SB
SC
RS
L
Remote Sensor
Pipe Sensor
Set Back
Fan High
Heat/Cool
Fan Low
(Optional)
(Optional)
(Optional)
Purple
Yellow
Gray
Orange/White
Red/White
White/Black
Red
White
Black
24-277
VAC
Fan Medium
System4
2-PipeSeasonalChangeover
N
H
C
FH
FM
FL
PS
SB
SC
RS
L
Remote Sensor
Pipe Sensor
Set Back
Fan High
Heat/Cool
Fan Low
(Optional)
(Required)
(Optional)
Purple
Yellow
Gray
Orange/White
Red/White
White/Black
Red
White
Black
24-277
VAC
Fan Medium
System5
2-PipeManualChangeover
withAuxiliary
N
H
C
FH
FM
FL
PS
SB
SC
RS
L
Remote Sensor
Pipe Sensor
Set Back
Fan High
Auxiliary
Heat/Cool
Fan Low
(Optional)
(Required)
(Optional)
Purple
Yellow
Gray
Orange/White
Red/White
White/Black
Blue
Red
White
Black
24-277
VAC
Fan Medium
System7
4-PipeAutoChangeover
N
H
C
FH
FM
FL
PS
SB
SC
RS
L
Remote Sensor
Set Back
Fan High
Cool
Heat
Fan Low
(Optional)
(Optional)
Purple
Yellow
Gray
Red/White
White/Black
Blue
Red
White
Black
24-277
VAC
Fan Medium
System6
4-PipeManualChangeover
N
H
C
FH
FM
FL
PS
SB
SC
RS
L
Remote Sensor
Set Back
Fan High
Cool
Heat
Fan Low
(Optional)
(Optional)
Purple
Yellow
Gray
Red/White
White/Black
Blue
Red
White
Black
24-277
VAC
Fan Medium
To Install Thermostat
ELECTRICALSHOCKHAZARD –TurnoffpoweratthemainservicepanelbyremovingthefuseorswitchingtheappropriatecircuitbreakertotheOFFpositionbeforeremovingtheexisting
thermostat.
IMPORTANT: Thermostat installation must conform to local and national building and electrical codes and ordinances.
Note: Mount the thermostat about ve feet above the oor. Do not mount the thermostat on an outside wall, in direct sunlight, behind a door, or in an area affected by a vent or duct.
1. Turn off power by removing the fuse or switching the appropriate circuit breaker off.
2. To remove cover, remove screw and pull gently at the seam at the top.
3. Set thermostat away from working area.
4. Align thermostat base with junction box mounting holes and feed the control wires through hole.
5. Use supplied screws to mount thermostat base to junction box.
CAUTION!: Be sure exposed portion of wires does not touch other wires.
6. Wire nut the thermostat wires to your system wires.
7. Gently tug wire to be sure of proper connection. Double check that each wire is connected to the
proper terminal.
8. Snap thermostat to base that is mounted on the wall. Refasten with screw.
9. Turn on power to the system at the main service panel.
10. Test thermostat operation as described in “Testing the Thermostat”. Configuration Mode Settings
1–System
Select the type of operation you require.
1. Heat Only is for a system with only heating.
2. Cool Only is for a system with only cooling.
3. 2-Pipe Manual Changeover is for a 2 pipe system that handles both heating and cooling. The user
selects whether the system will be set to heating or set to cooling.
4. 2-Pipe Seasonal Changeover is for a 2 pipe system that handles both heating and cooling. The
thermostat selects whether the system will be set to heat or set to cool based on the pipe sensor
temperature.
5. 2-Pipe Manual Changeover with Auxiliary is for a 2 pipe system that handles both heating and
cooling. The user selects whether the system will be set to heat or set to cool. If set to heat and the
pipe sensor indicates there is not heat, the auxiliary output will be turned on.
6. 4-Pipe Manual Changeover is for a 4 pipe system. The user selects whether the system will be set
to heat, cool or off.
7. 4-Pipe Auto Changeover is for a 4 pipe system. The user selects whether the system will be set to
heat, cool, heat & cool or off.
“1” Heat only
“2” Cool only
“3” 2-pipe manual changeover
“4” 2-pipe seasonal changeover
2–TemperatureScale
This thermostat can function in Fahrenheit and Celsius.
F = Fahrenheit (Default)
C = Celsius
3–ValveType
This thermostat operates with Normally Open or Normally Closed valves. Select the correct valve
type for your system.
no = Normally Open (Default)
nc = Normally Closed
“5” 2-pipe seasonal changeover w auxiliary
“6” 4-pipe manual changeover
“7” 4-pipe auto changeover (Default)
4–TemperatureSensor
Select the type of room temperature sensor you are using.
o = Onboard temperature sensor (Default)
r = Remote temperature sensor
5–FanOperation
Select either Automatic Fan or Continuous Fan.
Automatic Fan will automatically adjust the fan speed (Low, Medium, High) based on the set point
and room temperature. The more the room temperature is from the set point the faster the fan will
operate. The fan will be off in OFF mode.
Continuous Fan will run the fan at the fan speed that is selected with the FAN button. It can be
turned OFF only when in OFF mode.
A = Automatic Fan (Default)
C = Continuous Fan

LIAF104
Mode of Operation
Testing the Thermostat
Once the thermostat is congured, it should be thoroughly tested.
Note: If using pipe sensors, verify pipe sensor is within range to output. Check pipe
temperature by pressing the UP and DOWN buttons simultaneously.
Heat Test (For systems with heat)
1. Press SYS button until heat mode is displayed.
2. Adjust the set temperature so it is 5 degrees above the room temperature.
3. Heat should come on within a few seconds.
4. Adjust the set temperature 2 degrees below the room temperature and the heat should turn off.
There may be a fan delay on your system.
Cool Test (For systems with cooling)
1. Press SYS (left) button until cool mode is displayed.
2. Adjust set temperature so it is 5 degrees below room temperature.
3. Cooling should come on within a few seconds.
4. Adjust the set temperature 2 degrees above the room temperature and the cool should turn off.
There may be a fan delay on your system.
Fan Test (Continuous fan mode only, configuration setting #5)
1. Press FAN button. Fan displays. Fan turns ON.
2. Press FAN button. Fan turns OFF.
Operating Modes
There are four possible operating modes for the SC900V. OFF, Cool, Heat, andCool&Heat modes
are accessed by pressing the SYS button.
Note: The modes you can access are based on your conguration.
OFF Mode
• In this mode, the thermostat will not turn on the heating or cooling devices
Note: The fan (when congured as continuous fan) can be turned on manually in off mode by
pressing the FAN button. The word FAN shows on the display and the fan icon appears
when the fan operates.
Heat Mode
• In this mode, the thermostat controls the heating system. When the heat outputs, the ame icon
apprears on the display.
Cool Mode
• In this mode, the thermostat controls the cooling system. When the cooling outputs, the snowake
icon apprears on the display.
Heat & Cool Mode
• In this mode, the thermostat can automatically turn on heat or cool as needed. AUTO appears on
display with heat set point and cool set point.
Patent No. 424,953
7313 William Barry Blvd., North Syracuse, NY 13212
(Toll Free) 800-365-5525 (Phone) 315-233-5266 (Fax) 315-233-5276
www.icmcontrols.com
FIVE-YEAR LIMITED WARRANTY
The Seller warrants its products against defects in material or workmanship for a period of ve (5) years from the
date of manufacture. The liability of the Seller is limited, at its option, to repair, replace or issue a non-case credit for
the purchase prices of the goods which are provided to be defective. The warranty and remedies set forth herein
do not apply to any goods or parts thereof which have been subjected to misuse including any use or application
in violation of the Seller’s instructions, neglect, tampering, improper storage, incorrect installation or servicing not
performed by the Seller. In order to permit the Seller to properly administer the warranty, the Buyer shall: 1) Notify
the Seller promptly of any claim, submitting date code information or any other pertinent data as requested by the
Seller. 2) Permit the Seller to inspect and test the product claimed to be defective. Items claimed to be defective
and are determined by Seller to be non-defective are subject to a $30.00 per hour inspection fee. This warranty
constitutes the Seller’s sole liability hereunder and is in lieu of any other warranty expressed, implied or statutory.
Unless otherwise stated in writing, Seller makes no warranty that the goods depicted or described herein are t for
any particular purpose.
Button Functions
UP– Used to increase the set temperatures and to adjust
conguration settings.
DOWN– Used to decrease the set temperatures and to adjust
conguration settings.
SYS– Used to change from OFF, HEAT, COOL and AUTO
changeover modes.
PROG–Used to enter conguration and advance to the next conguration screen.
FAN–Used to turn the fan on and off. Also used to cycle through fan speeds
SYSthenPROG–Held in simultaneously for 10 seconds to lock and unlock the thermostat.
UpandDown– Pressed simultaneously to display pipe sensor temperature if pipe sensor is
connected.
FAN
SYS
PROG
Down
button
Up
button
11–DeadBand
Dead band is the minimum number of degrees allowed between heat set point and cool set point in
auto changeover operation.
Select setting between 0ºF and 9ºF (0.0ºC and 4.5ºC) Default: 4ºF
12–MinimumSetPointCooling(LowerLimit)
The minimum cooling set point can be limited so the cooling cannot be set too low.
Adjust setting between 45ºF and 90ºF (7.0ºC and 32.0ºC) Default: 45ºF
13–MaximumSetPointHeating(UpperLimit)
The maximum heating set point can be limited so the heating cannot be set too high.
Adjust setting between 45ºF and 90ºF (7.0ºC and 32.0ºC) Default: 90ºF
14–TemperatureCalibration
The room temperature can be offset to display a different temperature. Example: 70F room
temperature with -2 setting displays 68F.
Changes displayed room temperature between -9ºF and 9ºF (-4.5ºC and 4.5ºC) Default: 0ºF
15–LockFeature
Thermostat can be locked so temperature, congurations and mode cannot be changed.
Thermostat must be locked for this setting to take affect (see Lockout Feature)
0-9 - number of degrees that can be adjusted, mode cannot be changed
Cool-Heat – can adjust up to max heat and min cool but cannot change mode Default: 0
16–TemperatureDisplay
Select whether to display room temperature only, set point temperatures only or both.
“S” Display set point only
“r” Display room temperature only
“rS” Display set point and room temperature Default: “rS”
17–HotelCardSetback
This thermostat can function with a hotel card reading system. Select whether the system is
normally open or normal closed and then select the desired timing.
“0”Setback disabled (Default)
“h1” N.O. hotel card with 1 second going from unoccupied to occupied and 2 minutes going from
occupied to unoccupied
“h2” N.C. hotel card with 1 second going from unoccupied to occupied and 2 minutes going from
occupied to unoccupied
“h3” N.O. hotel card with 1 second going from unoccupied to occupied and 30 minutes going from
occupied to unoccupied
“h4” N.C. hotel card with 1 second going from unoccupied to occupied and 30 minutes going from
occupied to unoccupied
18–UnoccupiedCoolSetPoint
This setting will become the cool set point during unoccupied periods.
Changes setting between 72ºF and 90ºF (22.0ºC and 32.0ºC) during unoccupied period
Default: 78ºF
19–UnoccupiedHeatSetPoint
This setting will become the heat set point during unoccupied periods.
Changes setting between 50ºF and 70ºF (10.0ºC and 21.0ºC) during unoccupied period
Default: 65ºF
20–ButtonInactivity
No thermostat button activity for selected number of hours indicates an unoccupied condition.
Note: Works only when hotel card setback is disabled.
“0” Disabled (Default)
“4” 4 hours “12” 12 hours “24” 24 hours
21–ValvePurge
Select time to open valves during inactivity period. This feature purges the lines so water does not
become stagnant and helps keeps valves from sticking.
“0” Disabled (Default) “1” 1 minute every 24 hours “3” 3 minutes every 24 hours
6–PipeSensor(Y/N)(for2pipesystemonly)
Select whether you are using a pipe sensor to monitor the pipe temperature.
n = No Pipe Sensor Connected (Default)
y = Pipe Sensor Connected
7–PipeSensorCooling
Pipe temperature below this setting is considered to be cooling. If pipe sensor temperature is
above this selected temperature for more than the Pipe Sensor Delay Time the cool valve will be
turned off.
Changes setting between 50ºF and 65ºF (10.0ºC and 18.0ºC) Default: 60
8–PipeSensorHeating
Pipe temperature above this setting is considered to be heating. If pipe sensor temperature is
below this selected temperature for more than the Pipe Sensor Delay Time the heat valve will be
turned off.
Changes setting between 70ºF and 90ºF (21.0ºC and 32.0ºC) Default: 80
9–PipeSensorDelayTime
This is the time that the valve will be open to verify the pipe temperature before the valve is turned
off. This gives time for circulation through the system.
Changes setting between 0 and 5 minutes at 1 minute intervals Default: 5
10–1st-StageDifferential
Differential is the number of degrees between the set point temperature and the turn on
temperature.
Changes setting between d1ºF and d6ºF (0.5ºC and 3.0ºC) Default: d1ºF
The SC900V high voltage fan coil thermostat can be used for two pipe or four pipe systems. It can
control heat only, cool only or heat & cool systems. A pipe sensor can be used for two pipe systems to
verify the system is operating or automatically change to the correct operating mode. The thermostat
is congurable for all fan coil systems. The conguration setup is used to match the thermostat to
your system and turn on the features you want to utilize.
The thermostat can be setup for continuous fan or automatic fan. Continuous fan operates on the
fan speed that you have selected. You can turn the fan off in OFF mode when in continuous fan.
Automatic fan adjusts to the appropriate fan speed based on the set temperature and the room
temperature. The further the room temperature is away from the set point temperature the faster the
fan will operate.
The SC900V incorporates several hotel card and unoccupied options. These features can be untilized
to change the heat and cool set points to congured unoccupied set points when the room is empty.
A lock feature can be enabled so the setting can not be tampered with. A valve purge feature can be
used to cycle the valve so water does not become stagnant and to stop valves from sticking.
Lockout Feature
The SC900V has a button lockout feature so the mode cannot be changed
and the temperature adjustment is limited. Select the appropriate lockout
from Conguration Mode Settings (Step 15) of this guide.
To activate the LOCK feature:
1. Press the SYS button in, then press the PROG button in also. Hold
both in for 10 seconds
2. will display and the lockout function will be enabled.
To deactivate the LOCK feature, repeat steps 1 and 2 above.
Troubleshooting
Symptom Remedy
No display Check for voltage at thermostat; display is blank when
voltage is not present
System fan does not come on
properly
Verify wiring is correct, check connections are correct
(see Conguration Mode Setting 5)
Thermostat turns on and off too
frequently
Adjust temperature differential
(see Conguration Mode Setting 10)
Room temperature is not correct Calibrate thermostat (see Conguration Mode Setting 14)
If remote sensor is used, check connections
displays when any button is
pressed
Thermostat has the button lockout function activated
(see Lockout Feature and Conguration Mode Setting 15)
- - on display instead of room
temperature
Check for a bad connection if remote sensor is used
(see Conguration Mode Setting 4)
Heat or Cool not coming on
(No pipe sensor)
Verify wiring is correct, gently pull on each wire to verify
there is a good connection, verify conguration settings
Heat or Cool not coming on
(Pipe sensor connected)
Check pipe sensor temperature by pressing up and down
buttons in – if out of range, outputs may not turn on (see
Conguration Mode Settings 6-9)