Paloma PH2-20R DVSN, Engineering Handbook

Page: 135 / 172

1. Make sure power is disconnected and turn off gas and
water to both water heaters, then remove the front cover
from each water heater.
2. Feed one end of the DUOnex
TM
cable through a
grommeted hole in the bottom of the fi rst heater.
3. Plug the cable into the connector marked “F” on the right
of the Control Board (see Figure 5). The connector will
only fi t one way. Press until the connector snaps into
place.
4. Find DIP1 Switches in the upper right-hand corner of the
Control Board (see Figures 5 and 6).
5. Change the #4 Dip Switch setting on the DIP1 Switches
to the “ON” position on the fi rst water heater.
6. Pass the other end of the DUOnex
TM
cable through a
grommeted hole in the bottom of the second water heater.
7. Plug the cable into the connector marked “F” on the right
of the Control Board (see Figure 5). The connector will
only fi t one way. Press until the connector snaps into
place.
8. Find DIP1 Switches in the upper right-hand corner of the
Control Board (see Figures 5 and 6).
9. Change the #4 Dip Switch setting on the DIP1 Switches
to the “ON” position on the second water heater.
10. Attach the front cover on each unit and turn on the power,
gas and water.
11. Test the units by turning on a tub or shower fi xture.
ON
1 2 3 4
ON
OFF
ON
1
2 3 4
ON
OFF
1 2 3 4
1 2 3 4
DIP2
DIP1
MIN MAX
ADJ
LED
ON
1 2 3 4
ON
OFF
ON
1
2 3 4
ON
OFF
1 2 3 4
1 2 3 4
DIP2
DIP
1
MIN MAX
ADJ
Dip Switches and Buttons - Figure 6
Control Board - Figure 5
DIP 1
DIP 2
Type 2
DUOnex
TM
Installation
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