Safety Devices And The Upm Controller - Bosch FHP EC Large Series Installation, Operation And Maintenance Manual

10 | Safety Devices and the UPM Controller

NOTE: Do not set the ADJ DIP switch to the
(-) setting when electric heaters are
installed. Doing so may cause the heaters to
cycle on their thermal overload switches,
potentially shortening the life of the
switches.
The other DIP switch bank is used to select the
proper program in the ECM motor for the unit.
Refer to Figure #7 for the proper jumper
placement.
WARNING: Always disconnect power
before changing jumper positions on the
interface board and reset the unit
afterward.
WARNING: Remember to always turn
off unit power at the circuit breaker
before attaching or disconnecting any
wiring from these connections to avoid
accidental short circuits that can
damage unit control components.
To the left of the red and green status LED's is a
row of 1/4" male quick connects. These are used
to pass thermostat inputs on to the rest of the
control circuit.
T111970289 (2015/01)
SAFETY DEVICES AND THE UPM
CONTROLLER
1
2
3
4
5
[1] Board power indicator
[2] UPM Board LED indicator
[3] Water coil freeze protection temperature
selection (FREEZE1)
[4] Air coil freeze protection temperature selection
(FREEZE 2)
[5] UPM board settings
[6] Water coil freeze connection
[7] Air coil freeze connection
[8] LCD connection
[9] 24VAC power hot
[10] To compressor contactor
[11] High pressure switch connection
[12] Call for compressor
[13] Low pressure switch connection
[14] 24VAC power common
NOTE: If the unit is being connected to a
thermostat with a malfunction light, this
connection is made at the unit malfunction
output or relay.
Each unit is factory provided with a Unit Protection
Module (UPM) that controls the compressor
operation and monitors the safety controls that
protect the unit.
Safety controls include the following:
Subject to change without prior notice
EC Series
13 12
7 8
9
Figure # 9
11
10
EC Series