Rheem MGE - MHP, MGE, MHP Owner's Manual

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

SET

ON/OFF

SET TEMP

PROG CLOCK MODE

SELECT

ALARM

AUTO

FAN

ON

ALARM

LIMITS

RESET

mge-mhp-rheem-new2-new
Rev. 4 10/8/2010

Pic.3

Battery Holder

Pic.4

Quick connector

Pic.2

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).

Spring tongue

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

Shafts

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

Back panel Front panel

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

2

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

Fault IN

(24VAC)

Return air

sensor

Outdoor

Temp.

Sensor

(T1)

(NA)

Y1 Y2

AUX

AB

T1

T1

T0

T0

W1

B/O

W2

W3
HU

MGE

G2

G1

AL AL Rc

FD

Rh

C

14

15

16

Main
supply
24VAC

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

Fault IN

(24VAC)

Return air

sensor

Outdoor

Temp.

Sensor

(T1)

(NA)

Y1 Y2

AUX

AB

T1

T1

T0

T0

W1

B/O

W2

W3
HU

MHP

G2

G1

AL AL Rc

FD

Rh

C

14

15

16

Main
supply
24VAC

External
IR
Reciever

3

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

Hardware

jumpers

JP3-JP7

Screws to hold
PCB to plastic

JP1 to select

internal or

external

temperature

sensor with 2

positions A and B

Jumper Short

When the black

cover is placed on

the 2 legs.

Jumper Open

When the 2 legs

of the Jumper are

NOT SHORTED

Jumper Function Position Default

JP1

Internal Sensor Control Pos. A

Pos. A

External sensor control Pos. B

JP3

4 minutes delay for compressor Open

Open

No delay Short

JP4

Clock mode – 24 hours Open

Open

Clock mode – 12 hours (AM/PM) Short

JP5

Temperature in Fahrenheit Open

Short

Temperature in Celsius Short

JP6 Europe timer type Short Short

Reversing Valve (W1) output in heating mode (eg Rheem) Short

JP7

Short

Reversing Valve (W1) output in cooling mode (eg FHP) Open

4