Operating The Unit - Mitsubishi Electric CRHV-P600YA-HPB Service Handbook

[ VIII Test Run Mode ]

[3] Operating the Unit

1. Initial Operation
(1) Make sure the Run/Stop switch that controls the unit on the local control panel is switched off.
(2) Verify with the following checklist whether the heat source was properly selected.*
(3) Switch on the main power.
(4) Leave the main power switched on for at least 12 hours before turning on the Run/Stop switch that controls the
unit on the on-site control panel to warm up the compressor.
(5) Switch on the Run/Stop switch that cont rols the unit on the on-site control panel.
*Heat source selection checklist
Heat source fluid
Heat source fluid inlet
Heat source flow
range
*4
Connector
CN142D 1-3
*5
*1 To prevent the heat exchanger from freezing, check that the concentration of brine is such that the freezing
temperature is -18°C or less before operation.
*2 Either water or brine can be used.
*3 Refer to page 10 for the installment position.
*4 Refer to page 67 and page 69 for details on heat source flow range.
*5 If using water as heat source, cut CN142D 1-3 (short circuit wire). After cutting CN142D 1-3, the power reset function is
enabled. To prevent the heat exchanger from freezing, make sure to check that the CN142D1-3 is cut if using water as
heat source.
HWE1312A
START
Verify the heat source usage temperature range
Heat source inlet
temperature may
fall below 10 ºC
Heat source inlet
NO
temperature may
rise above 27 ºC
Brine counter flow
(upper side of inlet)
Brine Brine
Below -18°C Below -18°C
freezing temp. freezing temp.
*1
Upper Side Lower Side
Install the
attached inlet/
outlet labels *3
3
4.5 - 16.0 m /h 2.0 - 16.0 m
ON (Close) ON (Close)
NO
YES
Heat source inlet
temperature may
rise above 27 ºC
Heat source inlet
YES
temperature may
fall below 15 ºC
Brine parallel flow Water parallel flow
(lower side of inlet) (lower side of inlet)
Water *2
*1
Lower Side
Install the
attached inlet/
outlet labels *3
3
/h 2.0 - 16.0 m
OFF (Close)
- 106 -
NO
YES
NO
YES
Water counter flow
(upper side of inlet)
Water *2
Upper Side
3
/h 7.0 - 16.0 m
OFF (Close)
3
/h
GB