Mitsubishi Electric EHWT17D-MHEDW, Data Book

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Room thermostat
If fitting a new room thermostat for this system;
• Position it out of direct sunlight and draughts
• Position it away from internal heat sources
• Position it in a room without a TRV on the radiator/heat emit-
ter.
• Position it on an internal wall
Note:
Do not position the thermostat excessively close to the
external wall.
The thermostat may detect the temperature of the wall,
which could affect appropriate control of the room tem-
perature.
• Position it approx. 1.5 m from floor level
Ambient temperature thermistor (TH7)
Please install the ambient temperature thermistor (TH7) in a
place where external influences such as wind and sunlight are
minimized. Please install the ambient temperature thermistor
(TH7) cable in a place where people cannot touch. Run the
cable inside the wall or above the ceiling when installing the am-
bient temperature thermistor (TH7) cable. Use a fixable wiring
cover to secure the wiring from the top of the unit to the wall or
ceiling.
Repositioning
If you need to move the heat pump unit to a new position
FULLY DRAIN the heat pump unit before moving to avoid
damage to the unit. (See earlier instruction transportal han-
dling.)
Warning
Refrigerant pipes connection shall be accessible for
maintenance purposes.
Primary/sanitary Plate heat exchanger
Water (Primary) - Water (Sanitary)
1
3
4
2
How to remove the module
1. Remove the FRONT PANEL (four screws) 2. Remove the four screws that fix the MODULE FRONT
and FRAME
3. CYLINDER - MODULE
<WIRE>
Remove the 7 connectors from the MODULE BOX.
Remove the wires from the top of the MODULE BOX
and the wire clamps on the Primary/Sanitary P-HEX.
· UNIT SIDE
Put them together under the CONT BOX
· MODULE SIDE
Put them together on the MODULE BOX
<PIPE>
Remove the following four points.
Plate heat exchanger (Water/Brine - Refrigerant) IN
Plate heat exchanger (Water/Brine - Refrigerant)
OUT
3 WAY VALVE - Primary flow (from MODULE)
Primary Water Pump-Water in (Return)
B-225
Water to Water Heat Pump (WTW)
7
Cylinder
unit/
Hydrobox/GSHP/WTW
Cylinder
unit/
Hydrobox/GSHP/WTW