Bosch FHP UPM II Manuel utilisateur

I/O ZONE 560/583

UPM II

INSTALLATION

AND OPERATION

MANUAL

UNIT PROTECTION MODULE HARDWARE OPERATION

IMPORTANT: This manual is for UPM board part numbers 8733 800 260. See controller label

as shown in figure 1 to verify correct part number.

TABLE OF CONTENTS

Specifications.....................................................................................................................3

Unit Protection Module (UPM)...........................................................................................4

Power Random Start Up ...............................................................................................5

Anti short cycle delay ...................................................................................................5

Y Call..........................................................................................................................5

High and Low pressure protection .................................................................................5

Ground........................................................................................................................7

DIP Switch Settings......................................................................................................7

Selectable Alarm Mode .................................................................................................7

Freeze protection.........................................................................................................7

Brownout protection.....................................................................................................8

Condensation overflow .................................................................................................8

Sequence of Operation.................................................................................................8

UPM Sequence of Operation (SOO) Flow Chart ..................................................................9

Specifications

Power: 24VAC ± 10%, 50-60Hz, 1.4 VA of standby power consumption

(Single Class II 70VA or 100VA option available)

Physical: Printed Circuit Board and plastic stand offs.

Environmental

Operating Range: -40° to 176°F (-40 °C to 80°C); 10 to 90% relative humidity, non-condensing

All controls are conformal coated for environmental protection.

Digital Outputs: Three digital outputs relay contacts rated at 10A resistive @ 125 VAC; Two dedicated for

the compressor contactor 24VAC when “ON” and one dedicated for alarm purposes dry

contact Normally Open (NO)

Inputs: Four (9) inputs. Dedicated inputs for:

2 High Pressure Switches (HPC)

2 Low Pressure Switches (LPC)

2 Freeze Sensors (FREEZE) 10 K @ 77F Thermistor

1 Condensate Overflow Sensor (CON) 230 K +/- 15%

2 Compressor Call (Y) Signals

Status Indication: Visual (LED) status of power and alarms status indication.

Protection: Surge and transient protection circuitry.

Weight: 0.25 lbs. (0.12 Kg).

Overall

Dimensions: 5 -13/16” (width) by 4 -1/4” (height) by 1-3/4” (recommended panel depth).

147.32 mm (width) by 108 mm (height) by 32mm (recommended panel depth).

Listed By: UL

Mounting Hole

Dimensions: Four mounting holes in rectangular pattern with dimensions between them as follows:

5-5/16” (width) by 3-3/4” (height).

135mm (width) by 95 mm (height).

Unit Protection Module (UPM)

The Unit Protection Module (UPM) as shown in figure 1, is a printed circuit board (PCB) that

interfaces with the thermostat or the digital direct controller.

The main purpose of this device is to protect the compressors by monitoring the different states

of switches and sensors of each refrigerant circuit, this device provides time delays and protects

the unit against freezing of the water and refrigerant heat exchangers as well as condensate

overflow when the appropriate sensors are installed.

Figure 1 - UPM Two Stage

Alarm output is Normally Open (NO) dry contact. If 24 VAC output is needed R must be wired to

the ALR-COM terminal; 24VAC will be available on the ALR-OUT terminal when the unit is in

alarm condition. If pulse is selected the alarm output will be pulsed.

Power Random Start Up

This feature prevents multiple units sharing

same electrical circuit or network from

starting at the same time.

It assures that Heat Pumps sharing the

same electrical circuit do not demand high

inrush currents simultaneously when starting

back up after a power failure.

If the controller has been completely

powered down for more than 28

milliseconds, a random delay is initiated

typically the unit will start between the time

range of 270 and 300 seconds, this only if

the controller is set to normal operation (test

switch set to NO).

In order for the random sequence to initiate

the unit power must be removed completely.

Anti short cycle delay

This feature protects the compressor short

cycling if the Y call is set and removed.

The anti short cycle delay is 300sec delay

on break during normal operation.

Y Call

The UPM will energize the compressor’s

output (CC) in an event of a “Y” call from a

thermostat or controller (after the random

start up and/or the anti short cycle delays

have elapsed). Y input terminal must be

energized with a 24 VAC signal.

High and Low pressure protection

The UPM monitors the state of the High and

Low pressure Switch inputs of each

refrigerant circuit, HP1, LP1 and HP2 and

LP2 on the board respectively, these

switches must be closed in order for the

controller to energize the compressor output

(CC1 and CC2). The CC output will only be

energized when the switches are closed and

the anti short cycle (and /or random start up

when applicable) has expired.

NOTE:

If the board is set to test mode through the “TEST”

DIP switch the delay will be 5 seconds.

IMPORTANT:

If the board is set to “TEST” mode through the

“TEST” DIP switch SW1 delay will be 10 seconds.

High pressure protection

If the HP1 or HP2 switches are open upon a

Y1 or Y2 call the UPM will not energize the

respective CC1 or CC2 outputs and

therefore the correspondent compressor will

remain off, the fault LED will flash one (1)

time for the HP1 and 3 times for HP2 and

the alarm contact will remain off.

If a compressor is running in normal mode

on a Y call (Could be Y1 or Y2 or both) and

the high pressure switch opens, the UPM

will shut down the compressor output and

will keep it off until the switch closes and the

anti short cycle has expired. The controller

will keep track of the number of times the

switch opens, if within one (1) hour period

the switch opens the number of times set

via the DIP switch the controller will shut the

compressor down and perform a hard

lockout condition under this condition the

alarm contact will be energized.

The UPM allows the user to configure the

counts that the HP will be allowed to open

within one hour before the UPM performs a

hard lockout on the compressor. The user

can select either two or four times by

changing switch four (4) on the DIP switch

SW1 (shown on table 3) on the UPM board.

Low pressure protection

If the LP1 or LP2 switches are open upon a

Y1 or Y2 call (Could be Y1 or Y2 or both)

the UPM will not energize the CC1 or CC2

outputs and therefore the correspondent

compressor will remain off, the fault LED will

flash two (2) times for the LP1 and 4 times

for the LP2 and the alarm contact will remain

off.

If the compressor is running in normal mode

on a Y call (Could be Y1 or Y2 or both) and

the low pressure switch opens, the UPM will

keep the compressor running for two (2)

minutes if the condition remains after this

period of time the compressor will shut down

and the UPM will start a soft lockout. The

UPM will flash two (2) times for the LP1, four

(4) times for the LP2 and the alarm contact

will remain off.

If the switches close, the UPM will start the

compressor after the anti short cycle has

expired UPM will energize the compressor

output.

IMPORTANT:

To exit the hard lockout the controller must be reset

from the Y or R terminal by removing the power from

the selected terminal. The user can choose which will

be the reset point via the DIP switch SW1.

Ground

The UPM controller takes its ground

reference from the unit chassis which is

connected to the controller via the C-GND

spade terminal.

DIP Switch Settings

The DIP switch is used to configure most of

the available features of the UPM as follows:

Alarm mode, Constant or Pulse

Reset mode, Y signal or R signal

Lockout mode, two (2) or four (4)

Strikes

Test mode, Normal or Test operation

The settings shown below are factory default

for most heat pump applications, however

the Unit wiring diagram is the ultimate guide

for factory DIP switch default settings.

Figure 2 - Dip switch settings

The following table is available on the UPM

board as well and it depicts the switch

position and its associated functionality.

Selectable Alarm Mode

The UPM controller can be configured to

have either a constant signal or a pulse.

If constant (CONT) is selected the UPM will

provide a closed contact until the alarm is

cleared.

If pulsed (PULSE) is selected the UPM will

sequence the alarm contact with the fault

LED flashes.

Freeze protection

The default setting for the freeze limit trip is

30°F; however this can be changed to 15°F

by cutting the R17 for Compressor 1 and

R77 for Compressor 2 resistor located on

top of the DIP switch SW1.

The UPM controller will constantly monitor

the refrigerant temperature with the sensor

mounted close to the condensing water coil

between the thermal expansion valve and

water coil as shown in figure 4.

UPM DIP SWITCH CONFIGURATION

4 LOCKOUT 4 2

3RESET R Y

2 ALARM CONT PULSE

1TEST YES NO

Figure 3 - DIP switch table

1234

LOCKOUT

RESET

ALARM

TEST

If temperature drops below or remains at the

freeze limit trip for 30 seconds, the controller

will shut the compressor down and enter into

a soft lockout condition. Both the status LED

and the Alarm contact will be active. The

LED will flash (five (5) times) the code

associated with this alarm condition.

Once the UPM detects a brownout condition

its fault LED will flash seven (7) times as

error code indication.

Condensation overflow

The UPM controller continuously monitors

the drain pan for high condensate water

level, and to do so it utilizes a sensor and

identifies an alarm condition when the

sensor’s impedance drops below 230KΩ +/-

15 %. (ONLY when condensate sensor

option is present) Once the UPM senses this

resistance value it enters into a hard lockout

and reports the correspondent code via its

status LED (6 flashes).

Figure 4 - Freeze sensor location

To exit the hard lockout water has to return

to its normal level and UPM has to be reset

by removing the power from the Y terminal

(R if set on the DIP switch) the compressors

will be turned on after anti short cycle

expires.

Brownout protection

The UPM controller will constantly monitor

the power supply, if the nominal voltage

drops below 25% of its value. (18 VAC

approximately), the unit will enter brownout

protection mode. The compressor CC

outputs will be de-energized and the unit will

enter the soft lockout mode.

Sequence of Operation

The UPM sequence of operation illustrated

in the flow chart applies for both refrigerant

circuits. The second compressor is

energized 10 seconds after the first if both

Y1 and Y2 signals are applied at the

simultaneously.

The controller will not monitor the power

supply during the first 500 milliseconds of

compressor start up to avoid noise and false

alarms.

UPM Sequence of Operation (SOO) Flow Chart

601 N.W. 65

Court, Ft. Lauderdale, FL 33309.

Phone: 954-776-5471 Fax: 954-776-5529

www.fhp-mfg.com

6 720 220 322 REV. 6-11

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