Honeywell CM737 Installation instructions

DOC-1523-EN, Oct 2016
Operator control panel Honeywell CM737
User instruction

CM737
User instruction
1
User instruction operator control panel CM737
Contents
1Room thermostat CM737......................................................................................................2
1.1 Installing the room thermostat...................................................................................................................3
1.2 Installing the outdoor temperature sensor (option) ...................................................................................5
1.3 Starting up and component control of the room thermostat CM737 .........................................................5
1.4 Configure the room thermostat after installation .......................................................................................5
1.5 Setting the date .........................................................................................................................................6
1.6 Setting the time..........................................................................................................................................6
2Operating the room thermostat CM737...............................................................................7
2.1 Choosing the operating mode...................................................................................................................7
2.2 During Normal Operation ..........................................................................................................................7
2.3 Programming the room thermostat –Efficient Daily Use..........................................................................7
2.3.1 The Built-in Heating Program...............................................................................................................7
2.4 Reviewing the Heating Program................................................................................................................8
2.5 Modifying the Heating Program.................................................................................................................8
2.6 Disabling/Enabling Time Periods ..............................................................................................................9
2.7 Adjusting the Time.....................................................................................................................................9
2.8 Holiday Function........................................................................................................................................9
2.9 OTC heating curve ................................................................................................................................. 10
2.10 Parallel adjustment of heating curve...................................................................................................... 10
3Activation of installer parameters......................................................................................11
3.1 Entering the Installer Mode .................................................................................................................... 11
3.2 Category 1 parameters: Room Thermostat Settings.............................................................................. 12
3.3 Category 2 parameters: System Settings .............................................................................................. 13
3.4 Category 3 parameters: Bolier Settings ................................................................................................. 13
3.5 Category 4 parameters: Transparent Bolier........................................................................................... 14
3.6 Category 5 parameters: Fault History .................................................................................................... 14
4Troubleshooting the CM737...............................................................................................15
4.1 Fault Codes on the CM737 .................................................................................................................... 16

CM737
User instruction
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1 Room thermostat CM737
The operator control panel CM737, controls the supply temperature to the heating system. When connecting
the unit to the power supply, CM737 verifies the connected sensors and then automatically chooses to control
by room or outdoor temperature sensor.
Features:
Ergonomic user interface featuring an ‘OK-button’ and large LCD (Liquid Crystal Display) Screen.
7-day heating program to match the family lifestyle, whilst maximizing energy savings
4 independent temperature levels per day (from 5°C to 35°C).
Holiday button saves energy by reducing the temperature for 1 to 99 days.
Built-in Memory holds the user program indefinitely.
Picture 1
1
LCD display
6
Temperature change buttons
11
Program buttons
2
Time display
7
Temperature enquiry button
12
Copy day button
3
Heating indicator
8
Operating mode buttons
13
Day select button
4
Day indicator
9
OK button, green
14
Time change buttons
5
Temperature display
10
Holiday function button
OK-button (9)
When changing settings/values in CM737 the numbers in the display is flashing.
Confirm the new settings with the green OK-button (9) and the new setting will be confirmed.
Info-button (7)
Operating with outdoor compensation, target room temperature is shown on the display
Press the Info-button to review:
target room temperature
error code, if any
the text ext and measured outside temperature
measured supply water temperature
After ca. five seconds the display return to show measured room temperature.

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1.1 Installing the room thermostat
Before installation make sure that the electrical power supply is disconnected.
Install the room thermostat in the living
space according to following:
A suitable installation is about
1.5 meters above floor and on
an inner wall.
The room thermostat must not
be combined with other
thermostats in the same control
zone.
Picture 2

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Picture 3

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1.2 Installing the outdoor temperature sensor (option)
Connect the outdoor temperature sensor to the terminal strip in accordance with the electrical diagram, remove
any resistor.
If the outdoor temperature sensor is connected at a later time, for example in a construction period, the current
must be disconnected for a few minutes.
Set parameter 14 according to requested compensation; see 1.4 Configure the room thermostat after
installation.
1.3 Starting up and component control of the room thermostat CM737
Note: The substation must be filled with water before starting the room thermostat, if not the pump can be
damage.
The room thermostat, CM737, controls the supply temperature to the heating system. When connecting the unit
to the power supply, the CM737 verifies the connected sensors and then automatically chooses to control by
room or outdoor temperature sensor.
1. Put the electrical cable from the control panel into a wall outlet.
2. Check the actuator and pump function. In start-up mode, the components manoeuvres by the following
schedule:
10s actuator closes
10s actuator opens
10s actuator closes
10s pump runs
150s actuator closes
After approximately another 4 minutes CM737 changes from start up to normal regulation.
3. Press the MAN (8) button for a fixed set point (no reduction) of the room temperature.
4. Adjust the room temperature with the increase/decrease buttons on the right (6).
By outdoor temperature compensation this change represents a standard parallel shift of the heat curve,
recalculated for room temperature.
1.4 Configure the room thermostat after installation
CM737 can be configured in three different ways. All installation parameters can be found in the parameter list
under category 1, see 3.2 Category 1 parameters: Room Thermostat Settings.
Set parameter 14, under category 1, according to requested compensation.
Outdoor compensation, require a connected outdoor temperature sensor:
Set parameter 14 to 1
Room compensation: Set parameter 14 to 0.
Outdoor and room compensation, require a connected outdoor temperature sensor:
Set parameter 14 to 2.

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1.5 Setting the date
1. Press the DATE/DAY button to begin setting the date. When
you set the date for the first time after the batteries are inserted,
the display will show:
Press the or buttons to set the current day of the
month (e.g. d 01 = 1st day of the month) then press the green
button to confirm.
2. Press the or buttons to set the current month of the
year (e.g. m 01 = January) then press the green button to
confirm.
3. Press the or buttons to set the current year (e.g. yr.
06 = 2006) then press the green button to confirm.
The date is now stored.
1.6 Setting the time
1. Press either of the or buttons once to enter time
setting mode. The LCD screen flashes the time digits, when the
unit is powered for the first time the display shows 12:00
2. Use the or button to set the correct time then press the green button to confirm.
Each press on the buttons will change the time by one minute and holding them down will change the
time slowly at first and get progressively quicker.
Note: If this mode is entered accidentally then press the AUTO, MAN or OFF buttons to exit.

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2 Operating the room thermostat CM737
2.1 Choosing the operating mode
The room thermostat can operate in three different modes; Automatic, Manual or Off.
To set the operating mode press either of the AUTO, MAN or OFF buttons. The screen indicates which mode is
currently active by displaying AUTO, MAN or OFF.
NOTE: Alfa Laval recommends the mode MAN.
AUTO (automatic) mode sets the CM737 to follow the built-in temperature program, default or
personalized. Using this mode is the best way to maintain a high level of temperature comfort whilst
maximising the energy savings.
MAN (manual) mode sets the CM737 to act with a fixed set point throughout the day. The set point can
be adjusted from 5°C to 35°C by using the or buttons.
OFF mode sets the CM737 to control to a minimum temperature. Default setting of 5°C acts as a frost
protection.
NOTE: The built-in heating program has been designed to provide normal comfort requirements, but to
customise the settings please see 2.3 Programming the room thermostat –Efficient Daily Use.
2.2 During Normal Operation
Temperature Enquiry
In AUTO, MAN and OFF operating modes the CM737 will display the current room temperature.
To review the programmed target temperature, press the button. This temperature value will be
displayed flashing for 5 seconds before returning to the current room temperature value.
Temperature Override
During normal operation (AUTO mode) the programmed temperature can be adjusted manually by
pressing the or buttons or the button.
Note:This temperature override is cancelled at the next programmed temperature change.
2.3 Programming the room thermostat –Efficient Daily Use
2.3.1 The Built-in Heating Program
The built-in heating program has four temperature level changes per day that can be set between 3.00am and
2.50am the following day - allowing you to maintain the evening temperature after midnight. Each temperature
level can be set between 5°C and 35°C, and adjusted in 0.5°C increments. The factory default program for
heating is as follows.
Monday to Friday (Day 1 to 5)
Period
1
2
3
4
Time
6:30
8:00
18:00
22:30
Temperature
21 °C
18 °C
21 °C
16 °C
Saturday to Sunday (Day 6 to 7)
Period
1
2
3
4
Time
8:00
10:00
18:00
23:00
Temperature
21 °C
21 °C
21 °C
16 °C

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2.4 Reviewing the Heating Program
To review or edit the heating program use the PROGRAM or buttons to navigate between the four
individual programming periods for that day
Use the DAY button to step through each day of the week, so the complete 7 day heating program can be
reviewed or edited.
2.5 Modifying the Heating Program
To change the heating program:
1. Press either of the PROGRAM or buttons to enter the
programming mode.
The time /temperature settings for period on Monday day 1 will
be flashing. The active period is highlighted by a flashing square
around the numbers at the bottom of the screen and the selected
day is shown with the day indicator.
2. To adjust the period start time use the or buttons, the ‘OK?’ indicator will be displayed to
confirm the change. Holding the but-ton down will change the time quickly.
Note: If you are pressing the or buttons and the display flashes the next period, it means the
next period will be pushed forward.
3. Once the required time is reached press the green button to confirm.
Note: If the original time setting did not require adjustment press the green button to move to
step ‘d’.
4. The temperature setting for period on Monday (Day 1) will now be flashing. To adjust this press the
or buttons and confirm the setting again by pressing the green button.
5. The next time and temperature period will now be active. Adjust this by repeating steps b - d above
until all four periods are set for Monday or press the AUTO button to run the program as set, at any
time.
Chose how to set the program for the next day:
6. Press the COPY DAY button to copy Mon-day’s program into Tuesday. The display will go blank apart
from the ‘non flashing’ day indicator, which indicates the day copied and the ‘flashing’ target day to
copy the program to. To accept this day press the green button. To select a different target day
press the DAY button until the ‘flashing’ day indicator is under the required day, and then accept it by
pressing the green button.
Note: Once the target day is confirmed it becomes the day that is copied if the COPY DAY button is
pressed again.
Or
Press the DAY button to move the day indicator to Tuesday (Day 2). The program for that day can then
be adjusted by following steps b to e. Programs for the remaining days can be set in the same way,
using the DAY button to move to the next day.
To exit the programming mode select the de-sired operating mode by pressing the AUTO, MAN or
OFF buttons.
Note: To run the adjusted program; select the AUTO mode.

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2.6 Disabling/Enabling Time Periods
The room thermostat has four periods each day that can be programmed, but you may not need these entire
switch points for your heating requirements. Therefore, any period from 2 to 4 can be removed from (or
returned to) the heating program profile.
To disable or enable time periods:
1. To disable unwanted periods go to the desired period (2 to 4) using the PROGRAM or buttons
to navigate, ensure the correct period is highlighted with the flashing square symbol.
Press and hold the button for at least 2 seconds and the display will indicate the period has been
removed from the program.
2. To enable periods again follow the same procedure as above, navigating to the already disabled
period. To enable this period again press and hold the button for at least 2 seconds.
2.7 Adjusting the Time
To adjust the time during normal operation use the or buttons .Press the green button to
confirm any changes.
2.8 Holiday Function
The holiday function allows you to set a constant temperature (default = 10°C) for a specified number of days
(from 1 - 99 days). This saves energy and related costs when the house is empty, but resumes normal
operation on the day of return.
1. Ensure the CM737 is running in AUTO or MAN operating modes.
2. Press the holiday button to display the holiday day’s counter and temperature setting, along with
the holiday indicator .
3. Press the or time buttons to set the holiday time (1-99 days) and press the green
button to confirm.
4. Press the or buttons to set the holiday temperature (5°C - 35°C) and press the green
button to confirm.
The CM737 will now control to the new temperature for the set number of days that the home is vacant. At
midnight the holiday counter will be reduced by one until the selected number of days have passed. The
CM737 will then re-turn to normal operation as set by the MAN or AUTO mode. To cancel the HOLIDAY
function or to exit the function at any time: press the button a second time.

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2.9 OTC heating curve
The CM737 controls the indoor temperature as a
function of the measured outside air temperature.
The heating curve is the ratio between the measured
outside air temperature and the calculated supply
water temperature.
The ideal heating curve is dependent on the type of
installation (radiators, convectors, etc.), the thermal
properties and the location of the property. A heating
curve ratio of 1 to 40 can be set.
The figure shows several heating curve ratios for a
room temperature setting of 20°C without room
temperature compensation.
Picture 4
2.10 Parallel adjustment of heating curve
If any other room temperature set point
than 20oC is used the selected curve will
be parallel compensated. Every change
of the room temperature set point from
20oC will change the supply temperature
with approximately 3oC. If the room
temperature set point is increased from
20oC to 21oC, the supply temperature will
increase with approximately 3oC.
This example shows parallels of curve 10
by 19oC and 21oC.
Picture 5

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3 Activation of installer parameters
Installer Mode is used to alter the system settings for specific applications, to use the special features of the
room thermostat in a different way or to alter the factory present parameters.
Parameters are divided into groups:
Category 1 Room Thermostat Setup
Category 2 System Setup
Category 3 Boiler Settings
Category 4 Transparent Boiler Parameter
Category 5 Fault History
3.1 Entering the Installer Mode
1. Press the OFF button.
2. Press and hold the button and the two
PROGRAM and buttons together.
3. The unit will display the first parameter of installer
parameter group category 1.
4. Press the or button to change the factory
setting.
The display will flash indicating that a change has
been made.
5. Press the green button to confirm the change.
The display will stop flashing.
6. Press the button to go to the next parameter.
7. Press the PROGRAM button to go to the next
parameter category.
8. To exit installer mode, press the AUTO, MAN or
OFF button.
Picture 6

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3.2 Category 1 parameters: Room Thermostat Settings
Parameter
Para
meter
N:o
Factory Default Setting
Optional Setting
Display
Description
Display
Description
AM-PM / 24hr
Display
1:CL
24
24 hr clock display
format
12
12 hr –AM/PM clock display
format
Reset Time/ Temp
Program
2:rP
1
Time / Temperature
profile set to factory
default. Changes to
0 when one of the
time/temp profiles
are changed.
0
Factory Time / Temperature
profile has been modified
To restore the factory profile
set to 1
Upper Temp Limit
6:uL
35
35°C Upper Temp.
Limit
21 to 34
21°C to 34°C, adjustment in
1°C steps
Lower Temp Limit
7:LL
5
5°C Lower Temp.
Limit
6 to 21
5°C to 21°C, adjustment in
1°C steps
Temperature Offset
12:tO
0
No temperature
offset
-3 to +3
-3°C to +3°C, adjustment in
0.1°C steps
Proportional Band
Width
13:Pb
1.5
Proportional band of
1.5 degree
1.6 to 3.0
1.6°C to 3.0°C, adjustment
in 0.1°C steps
Room control / OTC
1)
14:rC
0
Room temperature
control (thermostat)
1 or 2
1 –OTC control without room
temperature compensation
2 –OTC control with room
temperature compensation
OTC heat curve
15:OC
10
1 to 40
1 to 40 adjustment in
steps of 1
Reset Parameters
to Factory Defaults
19:FS
1
All settings at factory
defaults Changes to
0 when one of the
parameter is
changed
0
Settings are as modified
above. To restore the factory
parameters set to 1

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3.3 Category 2 parameters: System Settings
Parameter
Para
meter
N:o
Factory Default Setting
Optional Setting
Display
Description
Display
Description
Summer heating in
OTC mode
1:SH
0
Summer heating
disabled
1 to 40
Minimum set point for the
heating and the pump will be
held on.
Economy function
2:SL
20
The outside
temperature at which
the heating will
switch off
10 to 30
The economy function will be
disabled if the setting for
summer heating is not 0
Economy function
3:Pd
10
Diff between outside
and calculated water
supply temperature
If the calculated water
supply temperature is not
greater than the outside
temperature by this amount
the heating will switch off.
3.4 Category 3 parameters: Bolier Settings
Parameter
Para
meter
N:o
Factory Default Setting
Optional Setting
Display
Description
Display
Description
Maximum central
heating setpoint 2)
1:CH
90
90°C or obtained
from the boiler
40 to 90
40°C to 90°C adjustment in
1°C steps
DHW setpoint 2)
2:HS
55
55°C or obtained
from the boiler
40 to 80
40°C to 80°C adjustment in
1°C steps
Supply water
temperature 3)
3:St
Actual
temp
Temperature
obtained from the
boiler (between 0°C
and 99°C)
N/A
Not applicable
Return water
temperature 3)
4:rt
Actual
temp
Temperature
obtained from the
boiler
N/A
Not applicable
DHW temperature
3)
5:Ht
Actual
temp
Temperature
obtained from the
boiler
N/A
Not applicable
Outside
temperature 4)
6:Ot
Actual
temp
Between -30°C and
99°C
N/A
Not applicable
Water pressure 3)
7:Pr
Actual
press
Between 0.0 bar and
4.0 bar
N/A
Not applicable
DHW storage
overnight
8:HO
1
DHW storage
enabled after last
period of day
0
DHW storage disabled after
last period of day
DHW storage
during HOLIDAY
9:HH
0
DHW storage
disabled during
HOLIDAY
1
DHW storage enabled during
HOLIDAY
Low capacity
control
10:LD
1
Not applicable
0
Not applicable

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3.5 Category 4 parameters: Transparent Bolier
Parameter
Para-
meter
N:o
Factory Default Setting
Optional Setting
Display
Description
Display
Description
P_heat
1
0
Proportional band
1K
I_heat
2
1
Integral factor
0.1 / minute
Run time valve
3
15
Time needed to open
or close valve
completely
10 seconds
3.6 Category 5 parameters: Fault History
Parameter
Para-
meter
N:o
Factory Default Setting
Optional Setting
Display
Description
Display
Description
In this category the occurred boiler errors can be viewed, beginning with the most recent boiler error.
1) Only if the setting is allowed by the heating appliance. Standard settings and limits can be set by the heating appliance.
2) Only available if supported by the heating appliance.
3) Only available if the outside temperature sensor is mounted.
4) Category 4 & 5 parameters are only available if supported by the heating appliance. This will depend on the type of boiler
electronics in the heating appliance connected with the CM737.
Notes: Always remember to press the green button to confirm that you want to store the new Installer Set-Up setting.
To exit the Installer Set-Up Mode press the AUTO or MAN button.

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4 Troubleshooting the CM737
Symptom
Possible Cause
Remedy
A flashing symbol
appears on the display within
one minute of the CM737 being
powered on.
The CM737 receives power
supply from the heating
appliance, but no information.
The CM737 is not connected to
the correct terminals of the
heating appliance.
Check if the wiring is connected
to the Open Therm connection
terminals of the heating
appliance.
The heating appliance is not
configured correctly.
Contact Alfa Laval.
A symbol appears
permanently (no flashing) on
the display.
Communication error due to an
interrupt or short circuit in the
link between the heating
appliance and the CM737.
Check if the power supply cable
of the heating appliance is
connected.
Check the wiring.
Contact Alfa Laval.
Display is blank
After installing the CM737 no
power to the heating appliance
is supplied and the
rechargeable battery hasn’t
been charged (takes max 1hr
until fully charged).
Check if the power supply cable
of the heating appliance is
connected otherwise contact
Alfa Laval.
The power supply or the
communication link between the
CM737 and the heating
appliance has been interrupted
for more than 8 hrs.
Check if the power supply cable
of the heating appliance is
connected. After the power is
restored the time may need to
be adjusted –otherwise contact
Alfa Laval.
A flashing symbol
appears on the display after the
CM737 being operating for a
period of time
The heating appliance is
showing an error
Press the button, to see the
error code. This fault code
depends on the type of heating
appliance See 4.1 Fault Codes
on the CM737.
A flashing symbol
appears on the display and the
room temperature is replaced
by “—“
Internal fault in the temperature
measuring circuit.
Contact Alfa Laval.

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4.1 Fault Codes on the CM737
If a spanner is visible on the display there is an on ongoing alarm. Press the Info-button to view the fault code.
Error source
Error code
No fault (power-up)
0
Supply water temperature sensor out of range
1
Outside air temperature sensor out of range
2
Case temperature out of range
3
Secondary pump or district heating supply
4
No OT communication
7
Fault code 0
This fault code can just be seen in the fault history, parameter settings category 5.
Fault code 1
Supply sensor failure
Cause
Measured supply water temperature lies below 0°C or above 100°C.
Actions
Respond with ‘invalid data’ when thermostat asks for supply temperature Turn the
pump off, and enter off mode.
Fault code 2
Outside sensor out of operating range. This fault code can only occur after the
measured outside temperature has been in range: -40°C to 60°C.
Cause
Measured outside temperature lies below -40°C or above 60°C
Actions
When the thermostat asks for the outside temperature the DHC will respond with
‘invalid data’.
After a reset this fault code will not occur again, until a valid temperature has been
measured, and then a non-valid temperature will be measured again.
Fault code 3
Housing sensor out of operating range
Cause
Measured environment temperature lies below 0°C or above 60°C
Actions
Turn the pump off, and enter off mode
Fault code 4
Secondary pump or district heating supply:
Cause
Cannot reach the set supply water temperature
Actions
Air in the pump, low temp/ not district heating supply
Fault code 7
No OT communication:
Cause
Thermostat doesn’t communicate by OT for 60 seconds
Actions
10 seconds after occurring, the DHC assumes an on/off thermostat is controller.
CH bit is cleared = 0.
Requested supply set point is cleared.
Fault is only cleared after a power cycle, OT thermostat is connected or
communication is working again.