Lochinvar HWH 32-220 G CE Installation, Commissioning, User & Maintenance Instructions page 69

7.8.4.1
7.8.4.2
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7.8.4.3
7.8.4.4
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7.8.4.5
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0311767_HWH_32-129_II_UKUK_V2.4, 2020-01-31
Preparation
Remove the cover (snap-on type) from the terminal block for the collector. This has the
following terminals:
Connecting the mains power
Note
Just as with the water heater controller, the solar heating system controller must have a
permanent electrical connection to the mains power supply. There must be a double-pole
isolator installed in the permanent connection. This is the same double-pole isolator as
installed between the mains power supply and the water heater itself. Whenever this
isolator is operated, both controllers can be switched on or off.
1. Connect earth, live and neutral to terminals 1 through 3
2. Fit the cables in the strain relief.
3. Connect the power cable to the isolator.
4. Continue (see section 7.8.4.3).
Connecting pump station - modulating pump
The pump station contains a modulating pump (PWM controlled). You must connect this
pump to the controller of the solar heating system.
1. Connect earth, live and neutral to terminals 10 through 12.
2. Connect PWM and PWM+ to point 1 and 2 of J18.
3. Fit the cables in the strain relief.
4. Continue (see section 7.8.4.4).
Connecting solar collector
Note
This sensor must be mounted in the solar collector;refer to the solar collector installation
manual.
Connect the sensor (S1) to the water heater as follows:
1. Connect the sensor to terminal 2 and 4 of J13.
2. Fit the cables in the strain relief.
3. Continue (see section 7.8.4.5).
Connecting tank sensor
Note
This sensor is already mounted in the tank prior to delivery. The sensor is mounted
between the inlet and outlet of the heat exchanger. However, you must still connect the
lead to the solar heating system controller.
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