CSI MR-AHU Istruzioni per il montaggio

MR-AHU Installation Sheet

Installation Sheet (TCON154 11/97) 1

Controller Installation

Check the mounting location for the MR-AHU. The

available area must measure at least 4.3"

8" (11.0

20.3

cm) and should be in a moisture free container away from

anylarge electrical devices. The screw holes are 3.75"

7.5"

(9.5

19.1 cm) as shown in Figure1, “MR-AHU

(Covered)”, and will require phillips or slotted pan head

screws.

You will not need to remove the plastic cover to install the

MR-AHU, or any of the connections. To replace the 4A FB

fuse, remove the plastic cover, remove the old fuse and

install a new fuse (see Figure2, “MR-AHU (Cover

Removed)”).

Connecting the Input Devices

Warning:

Ensure that no power is connected to the MR-AHU

during electrical installation. Failure to disconnect

power from all interconnected equipment when

performing electrical installation may result in damage

to the components and/or electrical shock or burns

Connect the external input devices (contact or thermistor)

leads to an input terminal, TB4 – 1 through TB4 – 4 (Input

1 to Input 4, see Figure3, “Input Device Connections”).

Connect the other input device lead (common return lead)

to the signal ground terminal, TB4 – 6 (Ground).

Figure 1. MR-AHU (Covered) Figure 2. MR-AHU (Cover Removed)

GROUND

OUTPUT 6

OUTPUT 5

OUTPUT 4

OUTPUT 2

OUTPUT 3

OUTPUT 1

TRIAC OUTPUTS

24VAC. 0.5A EACH. 2.0A TOTAL

123456

TB4

INPUTS

GROUND

+12V

INPUT 4

INPUT 3

INPUT 2

INPUT 1

INPUT PORT

TEST

D1 U1

TB5

OUTPUTS

1234567

SENSOR

LAN

TB1 TB2

AC PWR

TB3

12 123

LAN +

LAN –

24V ~

GROUND

SIGNAL

POWER

GROUND

PWR LAN

PORT I/STAT

PORT

ADDRESS-01

ADDRESS-02

ADDRESS-03

ADDRESS-04

ADDRESS-05

FUNCTION-06

FUNCTION-07

FUNCTION-08

FUNCTION-09

FUNCTION-10

FUNCTION-11

FUNCTION-12

SWITCHES

OUTPUT 1

TEST

OUTPUT 2

OUTPUT 3

OUTPUT 4

OUTPUT 6

OUTPUT 5

TRANSMIT

RECEIVE

STATUS DISPLAY

Micro-Regulator

ULLISTED

ENERGY MANAGEMENT

EQUIPMENT

CLASS 2 SOURCE

MODEL:

SERIAL NO.:

POWER:

24V – 7VA

(55VA MAX)

MADE IN USA

BY:

CONTROL SYSTEMS

INTERNATIONAL

P.O. BOX 59469

DALLAS, TX

75229

MR-AHU

8.00 "

7.50 "

4.30 "

3.75 "

DIN Rail

Mounting

Clips

Test

TB5

OUTPUTS

1234567

123456

TB4

INPUTS

330815–

SENSOR

LAN

TB1 TB2

AC PWR

FS1

TB3

12 12 123

MADE IN USA

Inputs

24 VAC Power Input

Sub-LAN Port

I/STAT Port

Address/Function

Select Dip Switches

LED Communications

Indicators

Control Outputs

4 A FB

Replaceable Fuse

Figure 3. Input Device Connections

123456

TB4

INPUTS

10K ohm Thermistor

GROUND

+12V

INPUT 4

INPUT 3

INPUT 2

INPUT 1

INPUT PORT

123456

TB4

INPUTS

10K ohm Thermistor

GROUND

+12V

INPUT 4

INPUT 3

INPUT 2

INPUT 1

INPUT PORT

Mixed Air

Temperature

Sensor

S/P/L Contact

MR-AHU with Binary Load

AHU_2100 and Earlier: MR-AHU with Binary Load

AHU_2200 and Later:

MR-AHU

2 Installation Sheet (TCON154 11/97)

I/STAT, S/STAT and W/STAT Connections

Connect the I/STAT, S/STAT, or W/STAT white, red, and

black conductors to TB3 – 1 through TB3 – 3 (Signal, Power,

and Ground) as shown in Figure4, “I/STAT and S/STAT

Connection”.

When connecting an S/STAT connect the blue and yellow

conductors to TB4 – 4 (Input 4). Refer to Table 2, “DIP

Switch Conﬁguration Settings”.

Connecting the Sub-LAN

Connect the + lead of the twisted pair sub-LAN cable to

terminal TB2 – 1 (LAN+, see Figure5, “Sub-LAN

Connections”).

Connect the – lead of the twisted pair sub-LAN cable to

terminal TB2 – 2 (LAN –).

Shield drain wire continuity must be maintained as the sub-

LAN cable passes through each MR-AHU. Shield drain

wires from each controller sub-LAN cable must be twisted

together, insulated, and tied back such that wires do not

come in contact with ground or any conductive surface.

Connect the shield drain wire directly to Electrical Service

Earth Ground at only one end of the cable (e.g., at the MCI,

MRI, or at one MR-AHU).

Note:

Refer to “Cable Requirements” in “Speciﬁcations” on

page 4.

Figure 4. I/STAT and S/STAT Connection

123456

TB4

INPUTS

SENSOR

TB3

GROUND

+12V

INPUT 4

INPUT 3

INPUT 2

INPUT 1

INPUT PORT

123

SIGNAL

POWER

GROUND

I/STAT

PORT

White

Red

Black

Blue

Yellow

S/STAT Only

I/STAT, W/STAT and S/STAT

Figure 5. Sub-LAN Connections

LAN

TB1

TB2

AC PWR

LAN +

LAN

PORT

LAN –

24V ~

GROUND

PWR

MR-AHU

Installation Sheet (TCON154 11/97) 3

Connecting the Output Devices

Connect one lead of the control relays to TB5 – 1 through

TB5 – 6 (Output 1 through Output 6) as shown in Figure6,

“Output Device Connections”.

Connect the other lead of the control relays to earth ground

as shown.

Note:

You must establish a proper earth ground connection

point prior to connecting wires to electrical equip-

ment.

•

Electrical Service Earth Ground wire must be

securely connected to the equipment chassis.

•

The 24 VAC transformer secondary lead must be

securely connected to the Electrical Service Earth

Ground wire.

•

The Electrical Service Earth Ground wire must be

connected to the ground terminal on the

controller power input terminal block, TB1 – 2

(Ground).

Connecting the Power Supply

Connect the 24 VAC input lead from a separate, isolated 24

VAC transformer to TB1 – 1 (24 VAC, see Figure7, “Power

Connections”).

Connect TB1 – 2 (Ground) to earth ground using 14-AWG

wire (2.1 mm

). TB1 – 2 connects to the same earth ground

connection as the neutral lead from the transformer.

Note:

Connecting TB1 – 2 to a chassis bonding post sepa-

rated by seams, welds, or fasteners in the metal

chassis could produce continuity ground faults.

Caution:

Applying 24 VAC power to any connectot other than

TB1 will cause component damage to the MR-AHU

circuit board.

Switch Settings

The DIP switch settings deﬁne the sub-LAN address and basic

conﬁguration of the unit. Deﬁne the sub-LAN address using

switches 1 – 5 to set an address ranging from 0 to 31. The value

is the accumulated value of switches 1 – 5 when set to the ON

position (refer to Table 1). The ON position of the switch is away

from the “Open” label on the switch base. The operational

conﬁguration can be initially set using the DIP switch settings in

Table 2. For information concerning speciﬁc application

conﬁgurations refer to TCON153,

Application Speciﬁc Controller,

MR-AHU Installation Guide

Figure 6. Output Device Connections

GROUND

OUTPUT 6

OUTPUT 5

OUTPUT 4

OUTPUT 2

OUTPUT 3

OUTPUT 1

Aux/Fan/Heat

Relay or actuator loads

24 VAC @ 0.5 A each, 2.0 A maximum Total

TB5

Earth

Ground

1234567

Damper

Fan

C2/H3 or C2 (See Note)

24VAC 0.5A EACH 20A TOTAL

TRIAC OUTPUTS

Note: MR-AHUs with binary load

AHU_2200 and later do not

support a third stage of heating.

Figure 7. Power Connections

LAN

TB1

TB2

AC PWR

LAN +

LAN

PORT

LAN –

24V

GROUND

PWR

Earth

Ground

Line Voltage 24 VAC

24 VAC Transformer

MR-AHU

4 Installation Sheet (TCON154 11/97)

Speciﬁcations

Table Notes:

1. MR-AHUs with binary load AHU_2100 and earlier support up to 3 stages of heating. MR-AHUs with binary load AHU_2200 and

later support up to 2 stages of heating.

Dimensions

MR-AHU: 8"L

4.3"W

2.5"H

(20.3

10.9

6.4 cm)

Operating Environment

Temperature: 32

to 122

F (0

to 50

Humidity: 10 to 90% RH, non-condensing

Input power: 24 VAC

10%, 50/50 Hz @ 8VA plus Triac

Output Load, 4 A fused (with I/STAT)

24 VAC @ 7 VA plus Triac Output Load, 4 A

fused (without I/STAT)

Cable Requirements

MR LAN

Maximum Length: 5,000 ft. (1,500 m)

22 AWG (0.324 mm

) shielded, twisted pair

(Belden 9184 equivalent) 5,000 feet (1,500 m)

maximum

24 AWG (0.206 mm

) shielded, twisted

pair (Belden 9841 equivalent) 4,000 feet (1,200 m).

30 pF/ft. or less between conductors, 55 pF/ft. or

less conductor to shield, 85 to 150 ohm impedance.

Belden 9841 or equivalent.

Inputs/Outputs

Inputs: Digital — Dry Contact, excitation 5 V at 0.5 mA

Analog — 10K Ohm NTC Thermistor, Dale

1M1002-C3 (Reference CSI TTS100 speciﬁcation)

Accuracy: 1%

Resolution: 0.4% Span

Span: 25

to 113

F (–4

to 45

Outputs: Low voltage Triac — 24 VAC @ 0.5 A maximum

each output (2.0 A maximum total), voltage

sourcing

MicroRegulator Interface

7792 MRI

7793 MCI

7798 I/SITE LAN

Agency Approvals

FCC Part 15

UL916 Energy Management Equipment Pending

UL94-V0 Rated Enclosure

Table 1. MR-AHU LAN Address

Switch Number 12345

Switch Value (Switch On) 124816

Table 2. DIP Switch Conﬁguration Settings

Primary Heat Auxiliary Heating Stages FanType S/STAT Fan Is OnWtih Heat

SW 6 SW7 SW8 SW9 SW10 SW11 SW12

None Off Off None Off Off On On Yes On No Off

1 Cooling Stage On Off 1 Heat Stage On Off Auto Off No Off Yes On

2 Cooling Stages Off On 2 Heat Stages Off On

2 or 3 Heat

Stages

(See Note 1) On On

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