Removing Air From The System - Sanden Eco GAUS-160FQTS Owner's Manual

Removing air from the system

Please note:
The following steps must be taken to ensure all air is removed from the
system. Failing to do so could cause water temperature variances and
possible damage to the circulating pump and heat exchanger.
Plumb pipes to the tank unit and the heat pump unit.
Push up the lever on the PTR valve to open, and 昀椀ll the tank unit with water.
Con昀椀rm that the water comes out of the relief valve and then close the lever.
Open the hot water taps in the home to remove air.
Close the hot water taps in the home once air is purged.
Open the brass drain plug, one turn is suf昀椀cient. Do not remove the plug entirely.
Close the drain plug (昀椀nger tighten only) once water runs clear.
Connect the power to the heat pump unit.
The Air Purge mode is auto-activated, the 昀椀rst time that the heat pump is powered up.
Alternatively, follow the steps below.
Air removing process
1. Air Purge Mode (Refer to Figure 4).
Access Maintenance Mode by depressing the up and down keys on controller for
approximately 5 seconds until controller displays maintenance mode: "H_SE".
2. Press the "Up" or "Down" keys until Air Purge mode is reached "APon" displayed on
the controller. Press "Enter" key.
After approximately 5 minutes, Air Purge mode will automatically complete and the heat
pump will start a heating cycle.
Open the hot water taps in the home to remove air.
Close the hot water taps in the home after no air is con昀椀rmed in the water.
*Caution
If air removing mode is not completed, the system will not start the heating cycle.
Figure 4: Air removing process
Sanden Heat Pump - Owner
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s Manual