13
5. SP4, SP5 & SP6
Installation of Thermistor
All StarPro heaters are supplied with a remote thermistor assembly. The thermistor must be installed in the supply air
duct, between 1m to 3m away from the heater, but never beyond the first branch take off (BTO) fitting.
Note:
Where a Brivis Add-On air conditioning indoor evaporator coil is installed, the thermistor must be located
in the discharge air pop of the indoor coil.
These installation practices promote more accurate supply air temperature control and optimise heater performance.
• Ensure that there is at least 1 metre of appropriately sized ducting installed between the heater and the first BTO
fitting (or evaporator coil).
• Drill a 20mm diameter hole through the top of the inlet end of the first BTO fitting (see diagram below) or
through the top of the evaporator coil’s inlet pop.
• Carefully insert the thermistor assembly (probe end first) into this hole and secure using the self drilling screw
provided. Seal any remaining openings with duct tape.
• Ensure that the thermistor lead is secured to timbers or duct outer casing (see diagram) to prevent damage.
Where the first BTO fitting is installed more than 3m away from the heater, an additional duct joiner (installer supplied)
will be required so that the thermistor assembly can be fitted correctly. Install the joiner between 1m to 3m away from
the heater ensuring that the thermistor can reach this joint. Then follow the steps above as per normal practice.
Diagram 13.
1.0 m
6. SP6 Condensate Removal
All SP6 models have a condensate drain outlet. A fitting and clamp are provided for connection to the drain (see
Diagram 14).
• For External models, the outlet is located in the bottom corner below the gas supply connection point.
• For Internal models, the outlet is located in the bottom corner of the supply air pop hole panel.
• The condensate is mildly acidic, and should be run via a PVC pressure pipe (to AS 1477), with an
outside diameter of approximately 27 mm, away from the heater to a suitable area (i.e. to above a drain,
sewer or pit)
• Use PVC cement on all joints to prevent any condensate leakage.
• Do not connect the condensate drain directly to the sewer or below ground level of a storm water drain. A
blockage in the drain system would cause the heater’s condensate tank to flood with water and shut down.
Check for any additional local drainage codes which may apply.
• Under no circumstances should it be allowed to run onto electrical connections, earth stakes, copper pipes or
concrete paths. It should also not discharge onto metallic roofs or guttering, however the condensate drain
may terminate into the vertical section of a downpipe above ground level.
• Tube length should be minimised and a continuous fall of 20mm per metre created. Maximum equivalent tube
length of 12m is recommended (or increase diameter size).
324702 CAAB024953 StarPro Installers Heat issue D.indd 16
17/05/16 8:41 AM
