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4
Installation
3. Insert the hook on the back of the hydrobox behind the notch of the back plate.
*The lifting up of the hydrobox is facilitated by first tilting the unit forward using the included packaging cushioning.
) Each of the right and left side panels has a
Lift up the unit so that the
marks are positioned above the top edge of the back plate as shown below.
<Side view of unit>
Unit
<Figure 4.1.8>
) Check and ensure that the
mark is positioned and properly engaged at the bent section level on the back plate as shown.
Unit
<Figure 4.1.9>
4. Referring to "How to access Internal Components and Control and Electrical Box", fix the unit to the back plate using the included 2 screws (accessory items).
Control and
electrical
box
<Figure 4.1.10>
CAUTION: BEFORE performing field piping, be sure to fit and tighten these two screws.
Otherwise, the hook could be disengaged, and the unit could fall down.
4.2 Water Quality and System Preparation
General
• The water in both primary and sanitary circuit should be clean and with pH value of 6.5-8.0.
• The followings are the maximum values;
Calcium: 100mg/L, Ca hardness: 250mg/L
Chloride: 100mg/L, Copper: 0.3mg/L
• Other constituents should be to European Directive 98/83 EC standards.
• In known hard water areas, to prevent/minimise scaling, it is beneficial to restrict
the routine stored water temperature to 55°C.
Anti-Freeze
Anti-freeze solutions should use propylene glycol with a toxicity rating of Class 1
as listed in Clinical Toxicology of Commercial Products, 5th Edition.
Note:
1. Ethylene glycol is toxic and should NOT be used in the primary water
circuit in case of any cross-contamination of the potable circuit.
2. For 2-zone valve ON/OFF control, propylene glycol should be used.
mark indication.
mark
Wall
Hook
Top edge of back plate
Back plate
(wall mounted)
Lift up the unit so that the
positioned above the top edge of the back plate.
mark
Mount the unit.
Wall
Hook
Bent section of back plate
Back plate
Control and electrical box
Unit
● Do NOT hold piping when moving the hydrobox.
Lift up the unit.
marks are
Fix the unit using the 2 screws.
* If it is difficult to access with power
tool, use hand tool instead.
<Figure 4.1.11>
< Figure 4.1.8 >
New Installation (primary water circuit)
• Before connecting outdoor unit, thoroughly cleanse pipework of building debris,
solder etc using a suitable chemical cleansing agent.
• Flush the system to remove chemical cleanser.
• The responsible installer should decide if anti-freeze solution is necessary for
each site's conditions. Corrosion inhibitor however should ALWAYS be used.
Existing Installation (primary water circuit)
• Before connecting outdoor unit the existing heating circuit MUST be chemically
cleansed to remove existing debris from the heating circuit.
• Flush the system to remove chemical cleanser.
• The responsible installer should decide if anti-freeze solution is necessary for
each site's conditions. Corrosion inhibitor however should ALWAYS be used.
When using chemical cleansers and inhibitors always follow manufacturer's
instructions and ensure the product is appropriate for the materials used in
the water circuit
en
<Accessory>
Screw M5×8
Unit
8
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