3.4.
The provision of a service stop valve in the cold supply pipe will assist in the
event of any subsequent servicing or maintenance. No non return valve or
restriction to be fitted within the mains supply to the heater.
3.5.
To obtain optimum performance a flow restrictor isolating ball valve must be
fitted where shown (see figure 3). This provides the user with the means to govern
the flow (and therefore temperature which is dependent upon flow) at the outlet
(see 5.3 SETTING FLOW RATE).
This unit does not require an Pressure Relief Valve by UL standard, it is
recomended that you check with the local codes to find out whether this is required.
If one is required please refer to Figure 3.
Electrical Requirements
3.6.
This appliance must be earthed.
3.7.
The installation must comply with national/local code of practices and
Electricity Supply Authorities requirements. All rules and requirements must be
strictly followed to safeguard against the hazards affecting life and property during
and after installation of this product and during subsequent servicing and
maintenance.
3.8.
The Power Pack heater must only be connected to a 230/240V ac supply.
3.9.
Before making any electrical connections within the installation, make sure
that no terminal is live. If in doubt, SWITCH OFF the whole installation at the
consumer unit or switch fuse (where fitted).
3.10.
The Power Pack heater must be connected to its own independent electrical
circuit.
3.11.
It is a requirement that the branch circuit protection should be 40A for 7kw
Power Pack and 50A for the 9kw Power Pack.
09
08
Fig. 03
Fig. 04
Fig. 05