FAFCO Drainback 200 Series Installation Manual - (Continued)
26
2) Solar Collector Installation
(continued)
7) Solar Controller Installation
STEP 1: REMOVE CONTROLLER COVER PLATE
STEP 9: REPLACE CONTROLLER COVER PLATE
STEP 3: LOCATE THE TANK SENSOR
STEP 5: SPLICE ROOF SENSOR WIRE
STEP 7: INSERT ROOF SENSOR INTO T1
STEP 2: REMOVE LOWER TANK COVER
STEP 10: VERIFY CONTROLLER READINGS
STEP 4: INSTALL SENSOR AGAINST TANK
STEP 6: STRIP TANK WIRE
STEP 8: INSERT TANK SENSOR INTO T2
Remove cover plate from the controller and mount the solar controller onto the wall or on the solar storage tank.
Replace the controller cover plate and plug the controller into a 120-volt outlet.
Locate the tank sensor in the controller box.
Strip jacket on sensor wire back about 1”. Cut off stripped ends of sensor leads and splice to sensor wire. Insert wires
as far as they will go into splice before clamping closed.
Attach the ROOF SENSOR wires in the terminal block connectors for T1. Use a small screwdriver to push the white
tab up, then insert the wire into the terminal and release the tab. It does not matter which side is red and which is
black.
Remove the lower access cover plate from the storage tank. Remove insulation and plastic cover.
The display shows the temperatures at the roof or at the tank. Use the arrow buttons to toggle between the two. If
the display does not show a temperature when T1 is selected, check the connections to the roof sensor. Likewise,
when T2 is selected and not temperature is displayed, check the tank sensor connections.
Insert in the water heater underneath the insulation to allow good contact with the tank wall. Run the end of the sensor
wire out the bottom or side of the access opening.
Cut both the roof sensor and tank sensor wires to length such that they can enter through the bottom of the controller.
Strip off about 1” of jacket exposing the individual wires. Strip about 1/4 “ of the insulation off each wire.
Repeat the process to connect the storage tank sensor to the “T2” terminal.
Note: Instructions for operating the controller are in the controller box!