Paloma PH2-20R OFN Engineering Handbook page 145

Connect the other end of the wiring harness with the two large molex
connectors to the respective sockets at the top of the main manifold
controller card.
Follow the steps in section 3.3.b for connecting the manifold control
cables to the expansion card.
Figure 3.4.a - Control Cable Installation at Controller
Expansion Card
Control Cable
Connectors
14 - 20
Wiring
Harness
Support
Tab
Main
Control
Board
Section 3.5 - Installing the Remote Control
When using the manifold controller only one (1) remote control can
be connected to the system. Do not connect more than one remote
control to the system and there is no need to connect a remote con-
trol to any of the tankless water heaters.
Notice: Use only 2 conductor 18 AWG thermostat wire, up to 192 ft
of wire may be used. Do not use any other wire such telephone or
network cable as it can interfere with proper operation of the remote.
Disconnect the power from both the manifold controller and the tan-
kless water heaters. Leave the power disconnected until the remote
control has been connected to the manifold controller system.
Find a suitable location for the remote control, a preferable location
would be somewhere that could be observed easily.
Run the wire to the remote control location, it may be run inside a
wall or junction box or surface mounted. Pass the wire through the
center hole in the wall plate if the wire is in a junction box or wall.
Mount the remote wall plate to the wall or junction box using suitable
fasteners. The remote plate will fi t a single or double gang box or
can be mounted directly to the wall surface with suitable anchors.
Connect the two conductor wire to the two screw terminals on the
back of the remote control. Secure the wire under the hold down
tabs and route the wire towards the center of the remote control. If
the wire is surface mounted, route the wire towards the bottom of
the remote and carefully remote the knockout at the bottom of the
remote. See fi gure 3.5.a
Route the excess wire into the opening on the wall or junction box.
Manifold System Installation
Mounting
Screw
Control Cable
Connectors
7 - 13
Wire Clamp
Control
Cable
Hang the remote on the wall plate and secure the bottom of the
remote with the supplied screw.
Figure 3.5.a - Remote Control Cable Installation
2 - Conductor
18 AWG T-stat wire
Remote Mounting
Screw
Section 3.6 - Connecting the Remote Control to Controller
Disconnect the power from both the manifold controller and the tan-
kless water heaters. Leave the power disconnected until the remote
control has been connected to the manifold controller system.
Remove the front cover from the manifold controller; there are 4
(four) screws holding the front cover on to the unit.
Run the remote control thermostat wire through one of the grommet-
ed holes on the bottom of the controller cabinet. See fi gure 3.6.a.
Secure the wire with a wire clamp and screw to the back of the cabi-
net as in fi gure 3.6.a.
Connect the two conductor wire from the remote control to the screw
terminals at the bottom right hand side of the manifold controller
board as shown in fi gure 3.6.a
Do not connect the two conductor wire from the remote control to
the power connection terminals, damage to the remote will occur.
Figure 3.6.a - Remote Control Cable Connection
Main Control Board
9
Wall Plate
Wall
Penetration
Wall Mounting
Screws
Connection
Terminals
Remote Control
Screw Terminals
Wire Clamp
Cable Through
2 - Conductor
18 AWG T-stat wire
Wall
Anchors
Grommeted
Hole
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