Second Water Temperature Setting - Hitachi RCUE40AG2 Service Manual

Control System

Second water temperature
setting:
pag. 58
2. Forced capacity control
a) Contents
Compressor operation capacity is set forcedly through customer wiring terminals.
Order signal pattern and compressor operation capacity are shown as below.
HOLD
Xa ON
Xb ON
b) Wiring method (customer wiring terminal)

4.9. Second water temperature setting

According to the day run / night run or classifi cation of load application, temperature
setting can be changed remotely.
Thanks to the two setting temperatures and the two control procedures for water
temperature (capacity control and full load or energy storage) these can be combined to
have the following possibilities.
1) Air-conditioning (capacity control ) + Air-conditioning (capacity control)
2) Air-conditioning (capacity control) + Heat storage operation (100-0%)
3) Heat storage operation (100-0%) + Heat storage operation (100-0%)
Air-conditioning temperature is set by rotary switch on operation PCB and heat storage
temperature is set by using "▲or▼" switch on indication PCB (7 segment).
Operation mode and setting

Water temp
Operation mode
Air-conditioning Air-conditioning Capacity control Capacity control
1)
Air-conditioning Air-conditioning Capacity control Capacity control
Air-conditioning Air-conditioning Capacity control Capacity control External Thermo Air-conditioning
2)
Heat storage Heat storage 100-0%
Heat storage Heat storage 100-0%
3)
Heat storage Heat storage 100-0%
SMGB0003 rev.0-01/2007
Compressor forced operation capacity
LOAD DOWN
ON
OFF
Switch: Air-
Dip Switch
conditioning/
control setting
heat storage
- Air-conditioning Air-conditioning
- heat storage heat storage
Air-conditioning
External Thermo heat storage heat storage
External Thermo Air-conditioning Air-conditioning
External Thermo heat storage heat storage
Normal operation
LOAD UP
OFF OFF
ON OFF
Setting water
Operation signal
temp
Rotary Switch Rotary Switch Local / remote
Segment Segment Local / remote
Rotary Switch Rotary Switch Local / remote
Segment Segment External Thermo
Rotary Switch Rotary Switch External Thermo
Segment Segment External Thermo