Table of Contents
Advertisement
COMMISSIONING AND CONTROL SETTINGS
12.2 SP4UN AND BX5 COMMISSIONING INSTRUCTIONS
12.2.1 Initial Damper Settings
Generally, a correctly designed and installed ducted system should have the following initial damper settings:
•
Living areas: 100% open
•
Bedrooms: 50% open
•
Bathrooms, ensuite and laundry: 25% open.
12.2.2 Initial Ignition and Gas Inlet Pressure Check
a. Disconnect the power supply from the system at the power point.
b. Connect a networker to enable access to the heater installation parameters (refer to para 10).
c. Locate the inlet gas pressure test point and loosen the captive screw three full turns anti-clockwise. DO NOT
remove the screw.
d. Attach a manometer to the inlet gas pressure test point on the gas valve (refer to the label on the gas valve for
the test point location).
e. Purge air from the gas piping and turn on the gas at the supply tap.
f. Connect and switch on the 240V power supply at the power point.
g. Turn on the thermostat and set the temperature to maximum (see the Owner's Manual for operating instructions).
Ensure that all zones (if any) are open. It should be possible to see the burners operating at the heater.
If there is air in the gas line, the heater may not ignite on the first attempt. Ignition attempts will
occur automatically. Allow time for the heater to rectify itself as it may simply be purging air. If
NOTE
ignition is not successful, the heater will cease ignition attempts and lock out with an error code.
If this occurs, take note of the code and reset the heater (refer to the Operation manual).
Initially the fan will run at a low speed (approximately 500 RPM) and then to ramp up to the preset fan speed for
heating (refer to Table 7, Item 1).
i. Wait for the heater to operate for at least 1 minute and then measure the gas inlet pressure. While all other gas
appliances are operating at full capacity, the gas pressure must not, at any time, fall below:
•
1.1 kPa for NG models
If the pressure cannot be maintained above these measurements, then the incoming gas supply is
inadequate. Check the supply pipe for blockages, and check the gas pipe and meter sizing.
j. Switch off the heater, remove the manometer, and tighten the captive screw at the inlet gas pressure test point.
k. Ensure that the system is functioning correctly up to this point before continuing with the commissioning
procedure.
12.2.3 Heater Temperature Settings and Fan Speed
In this step, the heating settings are adjusted to suit the installation. These settings are critical to the provision of
adequate and efficient heating for the installation.
a. Access the heater control settings (refer to Section 12.1) and confirm that the thermostat is set much higher than
the current room temperature.
b. Set the fan speed (H01 ID01) to provide sufficient but not excessive airflow. (Typically, the fan speed is less for
floor outlet systems than for ceiling outlet systems.) The airflow from down-vent ceiling diffusers in main living
areas should be felt near floor level.
Rinnai
38
Ducted Gas Heater IM
Advertisement
Table of Contents
