Estia HWS-1501CSHM3-E, Installation Manual, Page: 9 / 15

AIR TO WATER HEAT PUMP SYSTEM INSTALLATION AND SERVICE MANUAL
9
EN
6.13 Replace the thermal sensor into the LEFT HAND pocket of the cylinder heater
behind the thermal cut-out. Ensure it is fully inserted, and the securing grommet
is pushed into the open end of the pocket.
6.14 Refit the cylinder heater wiring links by inserting the male terminations into the
female terminals on the element tails in accordance with Diagram 3. Check all
wiring terminations are tight and secure. Replace and secure the terminal cover.
6.15 DO NOT SWITCH ON EITHER THE AIR TO WATER HEAT PUMP OR CYLINDER
HEATER UNTIL THE UNIT HAS BEEN RE-FILLED WITH WATER . Re-commission
the unit following the Installation and COMMISSIONING instructions.
7.0 MAINTENANCE – SAFETY VALVES
7.1 The Pressure Relief Valve and any other safety valves fitted should be regularly
checked for correct operation.
7.2 Manually operate the valve(s) and ensure that water flows freely from the valve
and through the discharge pipe. NOTE: the water discharged may be very hot.
Ensure the valve re-seats correctly when released.
8.0 USER INSTRUCTIONS
8.1 The water storage temperature at the Air to Water Heat Pump System Water
Cylinder is set at the control panel of the Hydro Unit. This can be set to give
temperatures in the range of 40ºC to 75ºC, 60ºC is recommended. Refer to the
Hydro Unit Installation Manual for details of how to adjust the storage
temperature should this be necessary.
8.2 To avoid any risk of freezing when the cylinder is not in use for long periods
during the winter months, it is recommended that the Air to Water Heat Pump
primary supply and the cylinder heater are switched off and the water cylinder is
drained. NOTE: this will not protect other parts of the system pipework. If this is
done the water cylinder must be fully re-commissioned prior to switching on the
Air to Water Heat Pump and cylinder heater or damage may be caused.
8.3 To ensure the water cylinder continues to operate at its optimum performance it
should periodically be maintained in accordance with the instructions given under
the sections headed MAINTENANCE .
2
3
4
1
5
1 TERMINAL BRACKET
2 THERMAL CUT-OUT
3 SENSOR TERMINAL
BLOCK
4 MAINS TERMINAL
BLOCK
5 RESET BUTTON
LOCATED ON THIS FACE
NOTE:
THE COVER AND ELEMENT
ASSEMBLY HAVE BEEN
REMOVED FROM THIS VIEW
FOR CLARITY
Diagram 4