Raypak B0507 Owner's Manual And Installation Instructions page 25

CONNECTIONS – ELECTRICAL
Warning: THE WATER HEATER MUST NOT OPERATE WITHOUT THE CIRCULATING PUMP RUNNING.
ELECTRONIC THERMOSTAT TEMPERATURE SETTING (SET POINT)
For reasons of safety and economy, we recommend that the electronic thermostat set point is set at the lowest
temperature that will provide sufficient hot water. Discuss the temperature setting requirements with the
householder or responsible officer. Refer to
INTERMITTENT PUMP OPERATION
For applications utilising intermittent pump operation, a run on timer is provided (modulating models only). For
on/off models, an optional pump run on timer kit part number 56076874 must be fitted to the water heater to
prevent nuisance tripping of the high limit thermostat due to residual heat build up in the heat exchanger. The timer
should be set to allow the pump to operate (run on) for at least ten (10) minutes.
EXTERNAL CONTROLS
Modulating models can be wired for use
with an external control such as a remote
thermostat or a remote time switch. To
connect an external control to the water
heater it is necessary to remove the
bridging wire between terminals marked
"TO
TANKSTAT"
TANKSTAT" and connect the external
control across these two terminals (refer
to the diagram opposite and to the wiring
diagrams on pages 28
On/Off models may be wired as depicted above with the installation of kit 56076874 (supplied separately).
Where a remote thermostat such as a tankstat is utilised, the water heaters electronic thermostat set point should
be adjusted to 5º higher than the setting on the remote thermostat (Refer to
POWER FLUEING
If the flue cannot be designed as outlined in the
required. Power flues must be designed by persons competent to do so and must be electrically interlocked with
the water heater(s). Contact Raypak for power flue wiring diagrams.
FLOW SWITCH
A flow switch is provided with the water heater and is wired to prevent operation of the main burner in the event of
no water flow. Refer to "Flow Switch Adjustment" on page 42.
Warning: THE WATER HEATER MUST NOT OPERATE WITHOUT THE CIRCULATING PUMP RUNNING.
BUILDING MANAGEMENT SYSTEM (BMS)
For applications requiring connection to a building management system, relays are installed as standard on all
models to provide „run‟ and „fail‟ status indication. The diagram on page
AMBIENT AIR COMPENSATOR
An Ambient Air Compensator (not supplied) may be installed and connected to the RWF55 electronic thermostat
on modulating models (refer to
CONTROL PANEL ACCESS
To access the electrical enclosure:

Remove the 3 Hex head screws from the clear Perspex front panel.

Remove the front panel.
"Temperature Control"
and "FROM
to 33.
"Ambient Air Compensator"
on page 43.
„Indoor Installation‟
section on page 12, then a power flue may be
26
on page 49).
25
"Temperature Control"
details a typical BMS system interface.
on page 43.