Paloma PH2-20R OFN Engineering Handbook page 152

Manifold System Operation / Installation
Section 1.5 - Maximum Temperature Adjustment
The factory default temperature setting is 120°F. Follow these in-
structions to set the system to allow Higher Temperature operation.
Follow the instructions below if it is determined that a setting of up to
140°F (185°F with a Commercial Conversion Kit) is required.
Turn on the remote control. Turn off the gas and water shutoff valves.
Press the UP arrow temperature adjustment button on the remote
control for several times and set the temperature at 120°F (49°C).
Press and hold the UP button on remote control for more than 5 sec-
onds. Number (120) on the display of the remote control will begin
to blink.
While the number is blinking, push the UP arrow temperature adjust-
ment button and the Down arrow temperature adjustment button at
the same time. The display of the remote control will show "140".
Push the UP or Down button to set desired temperature.
Turn on the gas and water shut off valves.
Check and ensure safe operation and performance of the water
heater.
To increase to 185°F Max temperature each Tankless water heater
is required to have a Commercial Conversion kit installed.
Section 2.0 - When Trouble Occurs
The Manifold control system is designed with system redundancy
in mind. If a failure were to occur within a tankless water heater,
the system will shut that unit down, bypass it, and display an error
notifi cation on the remote control display.
When an error occurs the remote will fl ash the heater number, error
code, and the temperature. This shows that the system has taken
that heater out of service and is continuing operation with the sys-
tem.
To review the heater trouble codes follow the maintenance instruc-
tions in the Use and Care Manual for the Tankless Water Heater.
Some errors can be corrected by power cycling the system, turn
off the power at the remote control, disconnect power to all water
heaters. Reconnect power to all water heaters and wait for the start
up cycle to complete and power on the system, If failure still occurs
contact Technical Service.
Section 2.1 COMMON ERROR CODES
Code Description/Resolution
82 EEPROM Error / Contact Technical Services
76 Remote Control or PCB Communication Error /
Contact Technical Services
65 Water Valve Open Error / Contact Technical Services
1L Lime Condition / Follow Flush Procedure in the Use
and Care Manual for the tankless water heater.
03 Dip Switch in Wrong Position for Operation
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Section 3.0 - Location
The MIC-6 Manifold Control System
mount inside a tankless water heater. This controller will only mount
inside and work with the tankless models listed on the cover of this
instruction.
The system requires the use a Main Remote Control (UMC-117),
one is included with each water heater, that must be installed in-
doors and per instructions provided with the water heater. Only in-
stall one Remote Control with this manifold system.
NOTICE: Follow instructions provided with the water heater for
installing the water heater and main remote control. The main
remote control is provided with the water heater.
Section 3.1 - Mounting the Manifold Controller
After all the tankless water heaters are installed in accordance with
the instructions in the Use and Care Manual, select one unit to be
the master.
Disconnect the power from the tankless water heater, and remove
the front cover.
The Manifold Control Unit will mount to the inside bottom right hand
side of the tankless water heater, in front of the gas valve.
Set the controller, face out, into the water heater, and align the
mounting bracket with the holes in the bottom of the tankless wa-
ter heater. Insert a screw, through each of the two the holes, and
tighten. Take care to ensure no wires are pinched under the bracket.
Figure 3.1 - Mounting the Controller
System Ground
Screw
Control Board
Ground Wire
Take the green and yellow control board ground wire, and secure
the ring terminal under the system ground screw, remove the screw,
insert it through the ring terminal with the other wires, and secure
back to the water heater chassis. Plug the molex connector into the
socket on the manifold control board.
6
is designed specifi cally to
Mounting Screws
From Underneath