7
WARNING: Field wiring connections and electrical
grounding must comply with local codes, or in the
absence of local codes, with the latest edition of
the National Electrical Code, ANSI/NFPA 70, or in
Canada, Canadian Electrical code, CSA C22.1 Part 1.
Manifold System Installation
Section 3.2 - Electrical Connection
The manifold controller requires 120VAC/60Hz. Have a receptacle
with the ground terminal near the manifold controller. The length of
the power supply cord is 10 feet (3.05 m). If local codes require, or
if installed outdoors, the manifold controller should be hard wired.
●
The electrical power supply requirement for this manifold
controller is 120VAC/60Hz, 3 Amps.
●
The manifold controller comes with a standard three (3) prong
plug power supply cord.
●
Use only a power outlet with a ground terminal. See Figure 3.2.a
●
Keep any excess length of the power supply cord on the outside
of the manifold controller.
●
Wiring should be carried out by a qualified electrician in
accordance with local codes.
●
The electrical power supply requirement for this manifold
controller is 120VAC/60Hz, 3 Amps.
●
The manifold controller must be grounded.
●
A green screw is provided in the junction box for grounding
connection.
●
Remove the power supply cord and install the connector for the
hardwiring (supplied) to allow hardwiring at the junction box.
●
DO NOT
connect grounding wire to water pipes, gas pipes,
telephone cables, lighting conductor circuits and to grounding
circuit of other equipment that carry a ground-fault interrupter.
●
An ON/OFF disconnect switch must be provided and installed
for power supply the controller. The disconnect should be with in
reach of the controller. A circuit breaker in/at an electrical panel
is not acceptable as a service disconnect switch.
●
Connect the live wire to black leg wire and neutral wire to the
white neutral wire.
Section 3.2.a - POWER CORD
(INDOOR Installation Only)
Section 3.2.b - HARDWIRING THE ELECTRICAL CONNECTIONS
(OUTDOOR or INDOOR Installation / Local Codes)
Figure 3.2.a - Power Connection Method
Standard Grounded
3-prong Outlet
3-Prong Power Cord
Supplied with Unit
Junction Box Inside
Controller Cabinet
Code Approved
Conduit
Field Connection
Hardwire Pigtail
Ground Screw
Properly Sized
Field Wiring
Wire Nuts
Section 3.3 - Manifold Control Cable Installation
The manifold controller communicates with each tankless water
heater in the system through a communication cable. Each end of
the cable connects to the control board and tankless water heater
control board using a molex connector. The cable can only be con-
nected one way, do not force the connections as damage to both the
cable and control boards can occur.
NOTICE: The tankless water heaters connected to this system
must be of the same type and model, do not connect heaters of
different types or capacities to this system.
This instructions assumes the tankless water heaters have been
installed according to their respective instructions in a parallel mani-
fold installation.
Disconnect the power from both the Manifold Controller and the
tankless water heater. Leave the power disconnected until all the
tankless water heaters in the system have been connected to the
manifold controller.
The communication cable is a specialized cable designed speci
fi
-
cally to connect to the tankless water heater and manifold controller.
The communication cable has two Molex plugs, one at either end.
One plug, the end marked “water heater side” and having the three
wires, red, black, and white, will connect only the water heater ter-
minal. The other end, not marked but having two red wires, a white,
and black wire, will only connect to the manifold controller. Do not
attempt to use any other cable or wire than a manufacture approved
communication cable. Do not install the cable backwards or force
the connectors in to the sockets, damage to the water heater and or
manifold controller can occur.
Remove the front cover from the tankless water heater; there are 4
(four) screws holding the front cover on to the unit.
Route the water heater end of the communication cable through one
of the holes with a grommet at the bottom of the water heater.
Connect the communication cable to the connector marked “F” on of
the water heater control board. See
fi
gure 3.3.a for location of con-
nector “F” on either the
fi
rst and second or third generation models.
Secure the cable with the wire clamp and screw included with the
cable to the edge of the control board as illustrated in
fi
gure 3.3.a.
NOTICE: The DIP switch settings on the water heaters
must be changed for the water heaters to be controlled
by the manifold controller.
Change the DIP switch #4 setting on the control board of the water
heater to “ON” position (UP) in order to switch the water heater to the
manifold installation mode. DO NOT alter any other DIP switch. See
fi
gure 3.3.a for DIP switch location on water heater PCB.
Attach front cover of water heater.
Repeat these steps for each of the water heaters in the manifold
system.
DO NOT turn on the power to the water heaters until
all communication cables are connected to the water
heaters and the manifold controller.
Section 3.3.a - Control Cable Installation at tankless heater.
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Summary of Contents for PH2-20R DVSN
Page 158: ... 158 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...
Page 159: ... 159 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...
Page 160: ... 160 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...
Page 162: ... 162 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...
Page 163: ... 163 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...
Page 164: ... 164 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...
Page 166: ...Schematic Disassembly PHH 32RDV PHH 25RDV 166 ...
Page 167: ...Schematic Disassembly PHH 32RDV PHH 25RDV 167 ...
Page 169: ... 169 Schematic Disassembly PHH 32ROF PHH 25ROF ...
