Rheem MGE - MHP User manual

mge-mhp-rheem-new2-new
Rev. 4 10/8/2010
MGE - MHP
Owner’s Manual – Installation and Operating Instructions
Please read this manual carefully before installation and use.
Index
Installation Instructions 1
Wiring Connections 2
Hardware Jumpers 3
Operating Manual 4
ON
ALARM
ON/OFF
SET
SET TEMP
PROG CLOCK MODE RESET SELECT
ALARM
LIMITS
AUTO
FAN

2
Pic.3
Battery Holder
Back panel Front panel
+
Pic.4
Quick connector
Shafts
Pic.2
Spring tongue
Spring tongue
Pic.1
1. Installation Instructions
It is recommended to mount the thermostat or return air sensors between 1.5 & 1.8
meters from the floor where possible.
Separate the base from the cover by pressing the tongue
(pic.1).
Gently disconnect the cover from the base with quick
connector (pic.2)
Line the back panel up against the wall or flat surface on which
it is to be mounted and drill the appropriate fixing holes (pic.3).
Insert screws so they extend approx. 3/16" (3 mm) from wall or
surface.
Align the back panel against these screws, pushing it forward,
allowing it to slide downwards to lock into position.
Make electrical connections to terminals on the back panel as
shown on enclosed electrical wiring diagram
Reconnect the quick connector.
Attach the cover to the base, first the two shafts and then the
spring.
Connect 24Vac to the thermostat; verify that LCD display is ON.
Do not install battery before power is applied.
Remove battery from back panel by sliding it to the left and out
from its white retaining clip and mount it in black holder on front
panel; insert it from the top, gently pressing downwards until it
snaps into place and is held under the top clip of the holder.
The ‘+’ engraved on battery should be visible (pic. 4).
Be careful when inserting the battery – the top clip of
the holder is very fragile.
Reassemble front and back cover.
Connect at top first then at bottom.
To change jumpers: Disconnect electricity, remove battery and
wait 60 seconds
Disconnect power before installing battery

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2. Wiring Connections
Compressor 1 Compressor 2 Heat element 1 Heat element 2 Heat element 3 Fan Not in use Alarm (Dry contact normally open) Not in use
Y1 Y2 W1
B/O W2 W3 HU G1 G2 FD AL AL Rc
Fault IN
(24VAC)
AUX AB Rh
T1 C
Main
supply
24VAC
Return air
sensor
(T1)
T1 14
T0 15
Outdoor
Temp.
Sensor
(NA)
T0
MGE
16
External
IR
Reciever
Compressor 1 Compressor 2 Heat pump Heat element Not in use Fan Not in use Alarm (Dry contact normally open) Not in use
Y1 Y2 W1
B/O W2 W3 HU G1 G2 FD AL AL Rc
Fault IN
(24VAC)
AUX AB Rh
T1 C
Main
supply
24VAC
Return air
sensor
(T1)
T1 14
T0 15
Outdoor
Temp.
Sensor
(NA)
T0
MHP
16
External
IR
Reciever

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3. Hardware jumpers
3.1 The Jumpers are located on the back of the front panel (Inside the thermostat) as shown
in the drawing.
Table 3.1 – Jumper selection
Jumper Function Position Default
Internal Sensor Control Pos. A
JP1
External sensor control Pos. B
Pos. A
4 minutes delay for compressor Open
JP3
No delay Short
Open
Clock mode – 24 hours Open
JP4
Clock mode – 12 hours (AM/PM) Short
Open
Temperature in Fahrenheit Open
JP5
Temperature in Celsius Short
Short
JP6 Europe timer type Short Short
Reversing Valve (W1) output in heating mode (eg Rheem) Short
JP7
Reversing Valve (W1) output in cooling mode (eg FHP) Open
Short
Jumper Short
When the black
cover is placed on
the 2 legs.
Jumper Open
When the 2 legs
of the Jumper are
NOT SHORTED
Hardware
jumpers
JP3-JP7
Screws to hold
PCB to plastic
JP1 to select
internal or
external
temperature
sensor with 2
positions A and B

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4. Operating Manual
4.1 Thermostat display
In normal display mode, the LCD alternates between real time
clock and set/room temperatures.
Hours Minutes
CLOCK SET TEMP
Set-
temperature
Room
temperature
4.2 On/Off
•Press the button to turn the thermostat ON.
When on – the “SYSTEM” LED will turn on.
•Press and hold the button to turn the thermostat OFF.
4.3 Selecting modes
•Press the button to switch between the four modes:
1. Fan only - When ventilation only needed.
2. Cooling
3. Heating
4. Cool/Heat - Auto change-over
Activating Heating or Cooling automatically
according to the set and room temperatures.
The current active mode will flash.
4.4 Set temperature
•Press the buttons – the word “SET” will flash.
•Adjust the set temperature using the buttons (range: 5-35
o
C).
SET TEMP
COOL
Set-
temperature
Room
temperature
HEAT
HEAT
COOL COOL
3. Heat1. Fan
4. Auto change-over2. Cool

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4.5 Auto fan
•Press the button to switch between “fan on” and “auto fan” modes.
In “auto fan” mode – the fan will work only when there is demand for cooling or heating.
AUTO FAN
4.6 Real time clock and day
Adjust the hours
•Press the button - the hours will flash.
•Adjust the hours using the button.
Adjust the minutes
•Press the button again – the minutes will flash.
•Adjust the minutes using the button.
Set the day
•Press the button again – the days will flash.
•Set the day using the button.
•Press the button again to return to normal display.

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4.7 Weekly Program
The thermostat can be activated and deactivated using a weekly program.
Different programs can be set for the weekdays (Monday to Friday), Saturday and Sunday
(all weekdays with the same program).
Two different programs can be set for each day (1
st
start time, 1
st
stop time, 2
nd
start time, 2
nd
stop time).
The following program chart can assist you during the program settings.
Monday Friday Saturday Sunday
__:__ __:__ __:__
__:__ __:__ __:__
__:__ __:__ __:__
__:__ __:__ __:__
Programming procedure
•Press the button - will appear on the display
•Press the button again – the HOURS will flash and the START, PROGRAM 1 and
MONFRI symbols will appear on the display.
•Adjust the start time (hours) for the 1
st
program of the weekdays using the buttons.
•Press the button again – the MINUTES will flash and the START, PROGRAM 1 and
MONFRI symbols will appear on the display.
•Adjust the start time (minutes) for the 1
st
program of the weekdays using the buttons.
•Press the button again – the HOURS will flash and the STOP, PROGRAM 1 and
MONFRI symbols will appear on the display.
•Adjust the start time (hours) for the 1
st
program of the weekdays using the buttons.
•Press the button again – the MINUTES will flash and the STOP, PROGRAM 1 and
MONFRI symbols will appear on the display.
•Adjust the start time (minutes) for the 1
st
program of the weekdays using the buttons.
•Repeat these steps for program 2 (weekdays), for the two programs of Saturday and for the
two programs of Sunday.

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Program display
Program layout
Start time (hours)
Program 1
Monday-Friday
START
MON TUE WED THU FRI PROGRAM
1START
MON TUE WED THU FRI PROGRAM
1STOP
MON TUE WED THU FRI PROGRAM
1 STOP
MON TUE WED THU FRI PROGRAM
1
PROG PROG PROG PROG
Repeat these steps
for the other
programs
PROG
Press to start
Start time (minutes)
Program 1
Monday-Friday
Stop time (hours)
Program 1
Monday-Friday
Stop time (minutes)
Program 1
Monday-Friday
Remarks
Every program must have a start time and stop time within the same day.
Use the button for quick review/edit the program – jump between days.
Press and hold the button to switch between program mode (program activated) and
manual mode (program not activated) – the program settings will remain in the memory of the
thermostat until the program is reactivated (this can be done only when the thermostat is
ON). An active program is indicated by the icon.
During programming the thermostat will automatically return to normal display mode when no
button is pressed within 5 seconds.

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4.8 Technician Settings
•Press the button – “C50” will appear on the display.
•Change the number to “55” using the buttons.
High temperature limit
•Press the button again – “HL” and the high temperature limit will appear on the display.
•Adjust the high temperature limit using the buttons (range: 4-39
o
C, do not set the high
temperature limit higher than 31
o
C where cooling is used).
Low temperature limit
•Press the button again – “LL” and the low temperature limit will appear on the display.
•Adjust the low temperature limit using the buttons (range: 2-30
o
C, do not set the low
temperature limit lower than 18
o
C where cooling is used or lower than 16
o
C where heat
pump is used).

10
High temperature alarm
•Press the button again – “HL” and the high temperature alarm will appear on the display.
•Adjust the high temperature limit using the buttons (range: 4-46
o
C).
Note: When the alarm activates, the AL,AL outputs will activate and the ALARM red LED will flash.
Low temperature alarm
•Press the button again – “LA” and the low temperature alarm will appear on the display.
•Adjust the low temperature limit using the buttons (range: 2-44
o
C).
Note: When the alarm activates, the AL,AL outputs will activate and the ALARM red LED will flash.
Reset the alarm
The alarm will automatically clear itself when the temperature returns to normal range.
The alarm can be manually cleared by pressing and holding the button

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Contacts
In the unlikely event of a problem with this Rheem controller you should contact the installing contractor.
Please write their details below:
Importer
The exclusive importer of Rheem Air Conditioners and Heat Pumps for the UK is Medal Aircon
Accessories Ltd and their email address is www.medalaircon.co.uk .
They may be contacted on 01743 466333 or by fax on 01743 466334.
Alternatively email them at s[email protected]

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