Buderus AM10 Installation And Operating Instructions Manual

For the contractor

Please read these
instructions care­fully

Installation and Operating Instructions

Controller

Modulating Outdoor Reset Control

mode

°F

72186100-00N

AM10

7218 6100 (07/2010) US/CA

US-listed

Contents

AM10 - We reserve the right to make any changes due to technical modifications!

2

Contents

1 Installation manual . . . . . . . . . . . . . . . . . . . . . 3

1.1 Description of Module . . . . . . . . . . . . . . . . 3

1.2 Outdoor reset . . . . . . . . . . . . . . . . . . . . . . . 4

1.3 Mounting of the AM10 . . . . . . . . . . . . . . . . 4

1.4 Positioning outdoor sensor . . . . . . . . . . . . 6

1.5 Single Boiler Control . . . . . . . . . . . . . . . . . 6

1.6 Cascade Boiler Control . . . . . . . . . . . . . . . 8

2 User Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2 Heating curve . . . . . . . . . . . . . . . . . . . . . . . 9

2.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.4 Settings description . . . . . . . . . . . . . . . . 10

2.4.1 1st menu, idle display . . . . . . . . . . . . . . . 10

2.4.2 2nd menu, supply temperature set point. 10

2.4.3 3th menu, target point of heating curves. 10

2.4.4 4th menu, base point of heating curves 11

2.4.5 5th menu, warm weather shut down . . . 11

2.5 Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.5.1 Fault code 5H . . . . . . . . . . . . . . . . . . . . . 12

2.5.2 Sensor fault/emergency operation . . . . 12

Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

AM10 - We reserve the right to make any changes due to technical modifications!

3

Installation manual

1

1 Installation manual

1.1 Description of Module

Product description

The AM10 is a modulating control for
Buderus boilers equipped with the EMS
bus. It sets the supply water temperature
based on outdoor temperature. The boiler
fires, runs and modulates based on the
information received from the AM10, and
the delta temperature between supply and
return.
An ON/OFF signal from 3th party room
thermostats or zone controllers is used to
communicate a heat demand.
The AM10 offers warm weather shutdown
when the outdoor temperature rises above
an adjustabletemperature. To control and
stage multiple boilers, combine the AM10
with an MCM10 module.

Fig. 1 Included items

2 x

2 x

2 x

4 x

3 x

mode

°F

72186100-01N

Installation manual

AM10 - We reserve the right to make any changes due to technical modifications!

4

1

1.2 Outdoor reset

Outdoor reset is a smart way to
economically control space heating based
on outdoor temperature. It functions based
on the fact that the colder the weather the
greater the heat loss of a structure, and the
higher the supply water temperature
needed to heat the house. On a warmer
day with smaller losses a lower water
temperature will be able to heat the house.

Outdoor reset is the preferred control
when using multiple zones, as the boiler
supply water temperature is not dictated by
a master or largest zone, but solely based
on the heat loss of the structure.

Heating curve

The AM10 has a built in linear heating
curve that sets the supply water
temperature in relation to the outdoor
temperature.

The maximum supply water temperature is
set on the boiler dial works as a high limit.
The boiler will follow the heating curve in
the AM10 up to the high limit.

1.3 Mounting of the AM10

Mount the AM10 module inside a Buderus
boiler. For detailed instructions see the
installation manual of your boiler.

For connecting the AM10 to the EMS-Bus:
(Æfig. 5).

Setting

Outside

temperature

[°F]

Supply

temperature

[°F]

Default 14 167
Example 1 0 170
Example 2 -10 175
Example 3 -20 180

Tab. 1 Heating curve

AM10 - We reserve the right to make any changes due to technical modifications!

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Installation manual

1

Fig. 2 Thermostat

Fig. 3 Outdoor sensor

On/Off

mode

°F

L

L ≤ 100 ft.

R ≤ 100 Ω

Ø = 18 AWG

Ø

72186100-02N

mode

°F

L

L ≤ 100 ft.

R ≤ 100 Ω

Ø = 18 AWG

Ø

72186100-03N

[°F] [k Ω] [°F] [k Ω] [°F] [k Ω] [°F] [k Ω]

-40 336.5 5 72.9 50 19.9 95 6.5

-31 242.6 14 55.3 59 15.7 104 5.3

-22 177.0 23 42.3 68 12.5 113 4.4

-13 130.4 32 32.7 77 10.0 122 3.6

-4 97.1 41 25.4 86 8.1

Tab. 2 Sensor resistance table

Installation manual

AM10 - We reserve the right to make any changes due to technical modifications!

6

1

1.4 Positioning outdoor
sensor

For best performance the outdoor sensor
is to be positioned where the sun can never
reach it. Mount only on a north facing wall
of the building, out of the sunlight, with at
least 1 foot (30 cm) above snow line. Keep
the sensor away from heat sources like
dryer, water heater, or boiler vents,
windows, etc.

Fig. 4 Sensor location

1.5 Single Boiler Control

To equip a single Buderus with outdoor
reset control, required items are:

• ON/OFF thermostat for every heating

zone with individual zone pump or zone
valve

•Pump relay

• Wiring



☺

☺



72186100-04N

AM10 - We reserve the right to make any changes due to technical modifications!

7

Installation manual

1

Fig. 5 Wiring detail

If there are multiple zones, wire all
thermostats in parallel for calls for heat
from any thermostat to produce a heat
demand.

Outdoor

sensor

N

Pump Relay

H C1 C2 X X

T T

Dedicated

120 VAC

15 Amp Circuit

Neutral

Zone
valve

Line

120 VAC

Field wiring

Low Voltage

Field wiring

AM10 Module

EV

1

2

FW

1 21 2

WA

1 2

FA

1 2

RC

DHW Tank

Sensor

Factory

Installed

Jumper

RC 10/20

Outdoor

sensor

T T

Connection

DHW

Sensor

Safety

Limit

Orange Blue Lt Green Lt Gray Red

Wire terminal strip

Terminals FA and WA

not used in this

application

1

2

1

2

On / Off
1 2

72186100-05N

Do not install RC10 module
when using this configuration.

Installation manual

AM10 - We reserve the right to make any changes due to technical modifications!

8

1

1.6 Cascade Boiler Control

In a Buderus cascade with an MCM10 the
AM10 is used as a modulating control
based on outdoor temperature. The
MCM10 will determine which boiler or
boilers need to fire and at what modulation.
The MCM10 also rotates the boilers for
equal run time. For details on the MCM10
module, consult the MCM10 manual.

Do not install RC10 module
when using this configuration.

AM10 - We reserve the right to make any changes due to technical modifications!

9

User Manual

2

2 User Manual

2.1 Introduction

The AM10 is an outdoor temperature­dependent controller with a linear heating
curve. The heat demand is communicated
using a dry contact input.

2.2 Heating curve

The heating curve indicates the
relationship between the outdoor
temperature and the supply temperature.
This concerns a straight line which can be
described by 2 points (A and B). Point A is
the supply temperature at an outdoor
temperature of 14 °F and point B is the
supply temperature at an outdoor
temperature of 68 °F. C is the high limit
supply temperature set on the boiler
(Æfig. 6).

The supply temperature requested by the
AM10 can never be higher than the high
limit supply temperature of the boiler. For
this reason it is recommended to set the
supply temperature on the boiler (line C) to
the maximum value, unless you deliberately
want to compensate the heating curve, for
example for a radiant floor heating system.

Fig. 6 Heating curve

1 Supply temperature [ °F]
2 Outdoor temperature [ °F]

2.3 Operation

Use the Mode key (Æ fig. 7, [1]) to go
through the various menu items(Æ fig. 7,
[4]) ; a line (Æ fig. 7, [2]) on the display
indicates the active menu item.

The value of a menu item which can be set
will flash. The value can then be changed
using the plus + and minus – (Æ fig. 7,
[3]) keys. The settings will not be lost if
there is a power outage.

Fig. 7 Display view

B

+68 +14 -40

C

A

72186100-07N

2

1

°F

mode

1 3

72186100-08N

2

4

User Manual

AM10 - We reserve the right to make any changes due to technical modifications!

10

2

If the display receives no user's input for
10 seconds, it will automatically switch
over to its idle display (outdoor
temperature). The display code is shown
(flashing) when the appliance is locked.
Otherwise the following symbols are
implemented:

2.4 Settings description

2.4.1 1st menu, idle display

The current outdoor temperature is shown
(64 °F); the corresponding symbol is
marked. A heat demand has been
registered on the AM10; the appliance is in
heating mode .

Fig. 8 Idle display

2.4.2 2

nd

menu, supply temperature

set point

Use the Mode key to select the 2

nd

menu

item: the supply temperature setpoint .

Range: 32 - 194 °F.

Fig. 9 Supply temperature on the boiler

2.4.3 3

rd

menu, target point of

heating curve

Use the Mode key to select the
symbol. This concerns the target point of
the heating curve corresponding with an
outdoor temperature of 14 °F. The value
will flash and can be changed using the +
and – keys.

Adjustment range: 68 - 194 °F.
Factory setting: 167 °F.

Fig. 10 Target point of heating curve

Symbol Icon Meaning

Flame Appliance in

heating mode

Switch

contact

AM10 received a

heat demand

Engineer‘s

wrench

Appliance locked

Tab. 3 Mode key icons

°F

72186100-09N

°F

72186100-10N

°F

72186100-11N

AM10 - We reserve the right to make any changes due to technical modifications!

11

User Manual

2

2.4.4 4th menu, base point of
heating curve

Use the Mode key used to select the
symbol. This concerns the base point of the
heating curve corresponding with an
outdoor temperature of 68 °F. The value
will flash and can be changed using the
plus + and minus – keys.

Adjustment range: 68 - 194 °F.
Factory setting: 86 °F.

Fig. 11 Display of 4

th

menu item

2.4.5 5

th

menu, warm weather shut

down

Use the Mode key to select the warm
weather shut down temperature . This
concerns the maximum outdoor
temperature at which the heating is still
operational. The value will flash and can be
changed using the plus + and minus –
keys.

Adjustment range: 32 - 86 °F.
Factory setting: 70 °F.

Fig. 12 Display of 5

th

menu item

2.5 Faults

The appliance is locked. When the
appliance is in idle mode, a flashing
appliance display code is shown instead of
the outdoor temperature and the key
symbol is displayed. Adjustments can
still be made by selecting the relevant
parameter using the Mode key. However,
the appliance will be in idle mode and the
display code will show for as long as the
system detects a fault.

The meanings of the various codes and the
relevant troubleshooting procedures are
detailed in the boiler's installation
instructions.

°F

72186100-12N

°F

72186100-13N

User Manual

AM10 - We reserve the right to make any changes due to technical modifications!

12

2

2.5.1 Fault code 5H

This is a communication fault. Check the
connection to the boiler.

Fig. 13 Fault indication

2.5.2 Sensor fault/emergency
operation

If no sensor is detected on the AM10,
dashes are shown in the numerical field
instead of the outdoor temperature.

If there is a heat request (the display will
show ), the AM10 will request 122 °F,
if this is permitted by the high limit.

Fig. 14 Sensor fault display

°C

72186100-14N

°F

72186100-15N

AM10 - We reserve the right to make any changes due to technical modifications!

13

2

Notes

AM10 - We reserve the right to make any changes due to technical modifications!

14

2

Notes

AM10 - We reserve the right to make any changes due to technical modifications!

15

2

Notes

United States and Canada

Bosch Thermotechnology Corp.
50 Wentworth Avenue
Londonderry, NH 03053
Tel. [phone]
Fax [phone]
www.buderus.us
U.S.A.

Products manufactured by
Bosch Thermotechnik GmbH
Sophienstrasse 30-32
D-35576 Wetzlar
www.buderus.com

Bosch Thermotechnology Corp. reserves the right
to make changes without notice due to continuing
engineering and technological advances.