Specifications

Rinnai Australia 19 Owners Guide & Installation Instructions
Filling Instructions:
It may be necessary to un-tie the float valve prior to filling.
When the primary water circuit is ready to be charged, open
the cold water line which will supply potable cold water to the
coils and to the make-up float valve fitting. Open the primary
water circuit to the HD200 units for both flow and return. Water
will begin to fill the tank via the float valve until the factory
adjusted level is achieved (approximately 40 mm below the
vent fitting). (Refer Figure 9). System will fill slowly to correct
volume. Operate primary pump for several minutes and check
air is bled from pump.
Open potable hot water isolating valve to building supply to
allow coils to fill, then close.
Figure 9 - DDHEX250 Tank fill level
Starting instructions:
1. Check all relevant valves, water and gas, are opened on the primary circuit and ensure no
blockages or restrictions are present.
2. Check all relevant branch outlets are closed on the ring main flow and return circuit.
3. Switch power to GPOs, and switch ‘ON’ GPOs to power both the DD250HEXHWTSTAT and
HD200 units.
4. Check 60°C set point on the DD250HEXHWTSTAT (thermostat is factory pre-set to 60°C) and
adjust if necessary.
5. Primary circuit will be activated and HD200 units will fire as the primary circuit pump starts.
6. You may need to bleed the pump of air, to do this:
a). Disconnect power to pump and close the isolating
valve on the discharge side of the pump.
b). Open the isolating valve in the suction pipe
completely before starting the pump.
c). Remove the filling plug .
is the pump drain plug. See Figure 10.
d). Fill the pump housing and the suction pipe
completely with liquid until a steady stream of liquid
runs out of the filling hole.
e). Fit and tighten the filling plug .
f). Slowly open the discharge isolating valve while the
pump is running. This ensures venting and pressure
build-up during start-up.
Figure 10 - High Efficiency Heat Exchange Water System
Primary Circulating Pump
(DDMSP504 / DDMSP303)
Fill range with-in
~ 40mm of overflow
EA
EB
A
B
A
GENERAL INSTALLATION INSTRUCTIONS