Features
- Longer AMB sensor wire to facilitate installing the sensor in the condenser inlet air stream on larger units.
- Direct measurement of RWB (not hand entered into the PDA) with a sensor immersed in a wet cotton sock.
- Direct measurement of RA and SA temperatures. This enables Evaporator Temperature Difference (ETD) (i.e. split across the coil) to be displayed and provides necessary measurements for Air Flow (AF) (in CFM/ton) to be displayed.
Installation
- Plug sensor array into Service Assistant.
- Strip back three pipe temperature sensors to 1 foot from connector.
- Setup ST and LT sensors
- Wire-tie ST and LT to blue and red hoses, respectively.
- Coil up extra wire at end of hoses in case extra lead length is needed for larger units. Leave about one foot of wire with sensor hanging past the end of the hose. Use Velcro bands (Home Depot) to store extra wire for easy use and storage. Install the Velcro band around the hose only initially.
- Install the clips, bunge cords and insulating wraps from the Quick Test arrays to the sensor probes.
- Roll up DT sensor wire around a hand and wire-tie to top of blue hose. This sensor will not be used. This gets it out of the way.
- Setup AMB sensor
- Strip back AMB and AOC sensor pair to about one foot from connector.
- Install Velcro strap around seven sensor wires just below connector.
- Wind up about ½ of the AMB wire around a hand and wire-tie near Velcro strap. This length will rarely be needed and this reduced wire management.
- Wrap the remaining wire around a hand and use the Velro strap to secure it on top of the wire-tied bundle. The AMB sensor should be near its wire bundle for easy placement on smaller units where the Service Assistant can be hung in front of the condenser coil.
- Setup RA, SA, RWB sensor bundle
- Wire-tie three sensor wires together every 1 to 4 feet starting near the connector.
- Starting near the connector, roll ½ of the sensor wires into a loop twice the size of your hand and along the top of the red hose. Wire-tie with two ties to the red hose just below the manifold. This extra length of wire will rarely be used.
- Install two Velcro straps near the two wire-ties on the wire bundle.
- Continue rolling the sensor wires until they are all bundled and secure to the more permanent bundle with the Velcro straps.
- Wire-tie the cotton sock to the end of the AOC sensor (now used for RWB).
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User Instructions
- Soak the cotton RWB sensor sock in distilled water until it is well saturated. The first soaking may take a long time (overnight).
- Update to Service Assistant software version 3.04 or higher.
- Go to "Utilities", "Prog. Options", "Next", then set "Temp Array Select" to "Auto" (default) or "Manual".
- Set to "Auto" for the Service Assistant to auto-detect the single stage array and start using it in the modified configuration ("One Stage RWB") to provide six temperature sensor inputs (ST, LT, AMB, RA, SA and RWB). The Quick Test array will also be auto-detected when installed.
- Set to "Manual" if you want the software to ask how to use the sensors in the single stage array when starting "Get Data".
- Select "Quick" to only use the three Quick Test sensors (ST, LT and AMB)
- "One Stage RWB" to use the one stage array in the modified configuration to provide six temperature sensor inputs (ST, LT, AMB, RA, SA and RWB).
- "One Stage STD" to use the one stage array in the standard configuration to provide seven temperature sensor inputs (ST, LT, DT, AMB, AOC, RA and SA) and labeled on the sensors.
Note:
Sensors are labeled on the wires near the sensor elements.
- Suction Temperature (ST) is labeled ST1.
- Liquid Temperature (LT) is labeled LT1.
- Return Air Wetbulb Temperature (RWB) is labeled AOC (used to be Air-Off-Condenser).
- Outdoor Ambient Temperature (AMB) is labeled AMB.
- Return Air Temperature (RA) is labeled RA.
- Supply Air Temperature (SA) is labeled SA.
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