American Water Heater NonCondensing Outdoor Natural Gas GT910NIE User Manual

							 - 21 - 
REMOTE CONTROLLER CONNECTION 
 
1) Disconnect power supply from the water heater . 
2)  Take off  the water heater ’s  front cover.  
3) Please find the remote control terminal  using the diagram  below  (located around the lower  
     right -hand side of the  water heater). 
4)  Open  the plastic cover of  the remote controller , and then attach the  two fork terminal s to  
connector  base of the backside of  the remote controller with two screws.   Make sure the 
terminals are firmly fixed.  
5 ) Put the remote wires through the hole on the b ottom of the unit casing.  
6 ) Connect the remote wires to the remote controller terminal properly  (No polarity) . 
*Do NOT  jump or short -circuit wires , or computer will be damaged.  
7 ) Replace Front Cover  securely. 
8 ) Wires used for the remote controller connection must be:  
•   Minimum  20 gauge wire (No polarity)  
•   Maximum  400 feet long  
 
 
R emote controller terminal s of the  water heater  
 
 
 
Front of remote 
Connect to these terminals 
Back of remote 
Connect other end to these terminals 
*For details on the connection to the remote controller accessory, refer to the remote controller 
Installation Manual. 
  
						

							 - 22 - 
PUMP CONTROL CONNECTIONS  
 
The water heater  can be used to control a recirculation pump. Proper pump control helps to 
p reserve the life of the system and saves energy as well .  
 
The  water heater  pump c ontrol port is a “normally -open  dry contact ”, and therefore needs 
additional components to properly control a recirculation pump.  T o control the recirculation 
pump, connect t he pump to the “pump  terminal ” in the water heater  as shown in the diagram 
below. (In a multi -unit system, connect the pump ONLY to the  “PARENT” unit.) The pump is to 
be connected using suitable relays shown in the diagram below  (the p ump terminal  is 
essentially only a dry contact.  An external power supply and relay s are required to 
operate  the pump) .  
Please make sure the relays are properly rated for the recirculation pump.   
 
Using the water heater ’s  internal thermistors as a temperature control, the reci rculation pump 
will only turn on when recirculation is needed.  
 
 
 
 
 
 
Connect to this terminal.  
This is the pump terminal. 
Power supply for relay 
Power supply for pump 
120 VAC  
220 VAC etc  
120 VAC 
220 VAC etc 
for relay  
Thermal relay 
Recirculation 
pump 
These components are NOT included 
with water heater  and are external to the 
unit.  They must be acquired separately. 
CAUTION: In a multi-unit system, the pump must be connected to the 
“P ump”  terminal in the “PARENT ” unit only.  If the pump is connected to 
any of the “CHILD” units, the pump will not work.  
						

							 - 23 - 
The dark squares indicate the direction 
the dipswitches should be set to. 
PUMP CONTROL MODE 
The water heater provides  the four types of the pum p control modes.  The pump control  modes 
are selected by  changing  dipswitch settings . The dipswitches are located in the upper bank  of 
dipswitch es in the  lower-left quadrant of the central  computer board  in the  water heater . (See 
picture  below) 
 
A)  Recirculation Control : No.  4 ON  
This mode is for providing hot water as soon as possible like a recirculation  usage.  The pump 
is only made to run while  the temperature of the water in the re -circulation loop is not close to 
the  set temperature of the water heater . The  pump will run for about 1 minute every 30 
minutes to determine whether or not the  water temperat ure in the whole  recirculation loop is 
lower  than 9°F  from  the  set temperature. If the water temperature is lower than  9°F  from the  
set temperature, the pump will remain running  until the water in the loop gets up to the set 
temperature.  If not,  the  pump w ill stop for  another 30 minutes. If  the inlet thermistor senses 
that the water temperature is lower than  9°F  from  the  set temperature  before those 30 
minutes have elapsed,  the pump will activate immediately and remain  running until the water 
in the loop ge ts up to the set temperature .  
B)  Storage Tank Circulation Control : No.5 ON  
The  water heater will heat the water 5.4°F higher than its set temper ature (unless the water 
heater  is already set at its maximum temperature of 185 °F).  This is to ensure a higher rate of 
recovery for storage tank applications.  The circulation  pump (from storage tank to water 
heater ) will always remain on.  
C)  Energy Conserving Recirculation : No.4 and  No.5 ON  
This  pump  control mode i s similar  to the “ Recirculation  Control mode”.  Ho wever, o nce the 
heat  requirement  is less than 7,440 BTU/h, the pump will turn off . The pump will ac tivate 
again  when the temperature of the system is less than  95°F or after  20 minutes have elapsed 
from its  previous operation.  
*If  operat ing the pump in  thi s mode, insulation  is recommended on  the water piping.  
D)  No rmal  Control  ( Default  setting ):  No. 4 and No. 5 OFF  
This provides no  ON/OFF control for the pump.  If a pump is connected to the pump control 
terminal  and both  No.4 and No.5  are OFF, the  pump will be made to run all the time  as long 
as  there is a power supply to  the  water heater  (If the  temperature remote controller  is 
installed , the pump will stop when  the remote is turned off). W ater in the loop will be 
maintained  at set  temperature . 
 
O N 
1  2  3  4  5  6  7  8 
RE-CIR
 
STORAGE
 
P-RE
 
LP 
 D -PRT  
B) Storage Tank 
     
 
Circulation Control 
A) Recirculation 
 Control  
 
C) Energy Conserving 
      Recirculation 
D) Normal Control 
 
Pump control modes  
     (Default) 
 
O N 
1  2  3  4  5  6  7  8 
RE-CIR
 
STOR
AGE
 
P-RE
 
LP 
 D-PRT  
O N 
1  2  3  4  5  6  7  8 O N 
1  2  3  4  5  6  7  8 
RE-CIR
 
STORAGE
 
P-RE
 
LP 
 D-PRT  
Upper bank of 
dips witch es  
RE-CIR
 
STORAGE
 
P-RE
 
LP 
 D -PRT   
						

							 - 24 - 
EASY-LINK SYSTEM 
The  water heater  can be connected with other heaters of the same model  with communication 
cables to work as a multiple manifold system.  
•   The Easy -Link system can connect up to 4 units.  
•   A communication cable (gray color) comes with each unit.   The cables use 18 gage wire 
and can be up to 250ft. long all together.  
You can manifold from 2 units to 4 units without a  multi-system controller.  A 4-unit  system  has 
full automatic modulation between  15,000 BTU/h and 1,520,000 BTU/h.   
 
 
 
 
 
 
 
 
 
 
 
 
•  The  Easy -L ink  system is limited to 4 units . If you connect more than 4 units, 
the first 4 units will work as part of the E asy-L ink  system, but the other 
additional units will only work as individual units.  
•  The  water heater  cannot  be linked  with other  different tankless models 
in the  Easy-Link system and Multi -Unit system
. 
 
 
 
 
 
 
 
 
 
 
 
CAUTION 
Easy-Link / Multi-unit 
System connectors are 
on each unit’s 
computer board  
To change the dipswitch 
settings for the Easy -L ink 
system ,  locate the  lower bank 
of dipswitches  to the right of 
the 7- seg LED . 
Do not adjust  the upper 
bank o f dipswitches.  
7-Seg LED 
Lower bank of 
dip switch es  
Upper bank of 
d ip switch es  
Gas 
 
Cold 
 
Hot 
 
This lamp will flash when the unit is allowed the operation. 
  
						

							 - 25 - 
The dark squares indicate the direction 
the dipswitches should be set to. 
 Easy -Link Connection Procedures  
1. Choose one of your units as the “ PARENT” unit. 
2. “ The  PARENT ”
 
Locate the lower bank  of dipswitches to the right of t he 7-seg. LED on the  central 
computer board  of the  unit that you select to be the “ PARENT” unit. Change dipswitch  No. 
8  to “ON”.   Do not change any of the dipswitches on the “ CHILD” units. 
3. Between the “ PARENT” and the “ CHILD-1 ”
 
Connect the “ PARENT connector” of the “ PARENT unit” to the “ [1] connector” of the 
“ CHILD- 1” unit.  
4. Between the “ CHILD-1 ” and the  “CHILD -2 ”
 
Connect the “ [2] connector” of the “ CHILD-1 ” unit to the “ [1] connector” of the “ CHILD-2” unit.   
5. Between the “ CHILD-2 ” and the “ CHILD-3 ”
 
Connect the “ [2] connector” of the “ CHILD-2 ” unit to the “ [1] connector” of the “ CHILD-3” unit.  
6.  Make sure the 7- seg. LED of all the unit ’s computer boards display the unit #.  The numbering 
system  automatically allocate s the unit  # to each water heater i n the Easy -Link system , in 
accordance  with the table below .   
 
 
 
 
 
     
 
 
 
 
 
 
CAUTION 
•   Unless you change dipswitch No.  8  of  the “ PARENT ” unit to “ON”, the system will not 
work as an  E asy -L ink  system.  T he  units will work as individual units.   
 
     
 
 
 
 
PARENT unit Unit # : 1 
CHILD units Unit# : 2, 3 and 4 
Wrong dipswitch setting 
on  the  “PARENT” unit   
Communication cable
ConnectorsPARENTConnectorsPARENTConnectorsPARENTConnectorsPARENT
Lower bank of Dipswitch
OFF
ON
Lower bank of Dipswitch
OFF
ON
Lower bank of Dipswitch
OFF
ON1 2 345 678 1
234 567 8
123 456 78
11
22
11
22
11
22
11
22
Lower bank of Dipswitch
OFF
ON12 345 678
PARENT unit CHILD-1 unit CHILD-2 unit CHILD-3 unit 
C
om munication cable
PARENTPARENT
1
L
owe r bank of Dipswitch
2345678
OFF
O
N
C on nectors Con nectors
11
22
1
Lower bank of Dipswitch
2345678
OFF
O
N
11
22
PARENT unit CHILD-1 unit  
						

							 - 26 - 
CAUTION 
•   If you connect the “ [1] (or  [2]) connector” of the “ PARENT” unit to the “ PARENT (or  [1]) 
connector” of the “ CHILD-1” unit, the system will not work as  the Easy -L ink  system.  The units 
will  operate  as individual units.  
 
 
   
 
                                                                         
 
 
 
 
 
 
 
•   If you connect the “ PARENT connector”  of the “ CHILD-1 ” unit to the “ [1] connector” of the 
“ CHILD- 2” unit, the “ CHILD-2” unit will work as an indi vidual unit, and will not be part of the 
E asy -L ink  system.  
 
 
 
 
 
 
 
 
 
 
 
 
WARNING  
Connecting two “ PARENT connectors” together  from two separate units may 
damage the computer board. The communication cable has a female end 
and a male end so it’s impossible to have a PARENT  - to - PARENT  
connection with the communication cable.  Do not splice or modify 
connectors.  
Wrong connection between the “PARENT” unit and the “CHILD-1” unit 
Wrong connection between the “CHILD-1” unit and the “CHILD-2” unit 
Prohibited 
PARENT unit CHILD-1 unit 
Communication  cable
PARENTPARENT
L
owe r bank of Dipswitch
OFF
O
N
1 2 345 678
Lo
wer bank of Dipswitch
OFF
O
N
1 2 345 67 8
C
on nectors Con nectors
11
22
11
22
PARENT unit CHILD-1 unit 
Communication cable
PARENTPARENT
L
ow er bank of Dipswitch
OFF
O
N
12345678
Co nnectors Connectors
11
22
11
22
Low er bank of Dipswitch
OFF
O
N
12345678
PARENT unit CHILD-1 unit CHILD-2 unit 
Communication cable
PARENTPARENT
P
ARENTConnectorsConnectorsConnectors
Lower bank of Dipswitch
OFF
ON1 234 567 8
Lower bank of Dipswitch
OFF
ON1234 567 8
Lower bank of Dipswitch
OFF
ON123 456 78
11
22
11
22
11
22 
						

							 
- 27  - 
Communication cable
P ARENTPARENTConnectorsConnectors
Lower bank of Dipswitch
OFF
ON
Lower bank of Dipswitch
OFF
ON1 234 56 78 1
23 456 78
11
22
11
22
•
  If a remote controller (optional) is used, it has to be connected to  the “PARENT ” unit. If the 
remote controller  is connected to a “ CHILD” unit,
 it will only control that particular individual 
“ CHILD” unit and will not control the E asy-L ink system  as a whole.  
 
 
 
 
 
 
 
 
 
 
MULTI -UNIT SY STEM FOR LARGE VOLUMES  
Multi-Unit system allows 9 10 (T -M 50) model to  be combined  together from two  to  10 units with 
the  multi- unit  controller  and  remote  controller  for commercial or residential applications.  For a 
10- unit system, the computer can modulate  from  15,000  BTU/h to  3 ,800,000  BTU/h. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
An individual cut -off switch is recommended for each unit in a multi -unit system for the purpose 
of maintenance.  
•  The  remote controller is not required for the  Easy -L ink  system.    
• If running  the Easy -L ink  system  without the remote controller , please make 
sure the dipswitch settings for the temperature, outdoor, and  direct -v ent  
settings on ALL the units are set to the same settings.  Otherwise, the units 
may not operate properly.    
• If the remote controller  is used, the temperature on all t he units in the 
system will automatically be set to the same temperature that is set on the 
remote.  However, even with the remote, the outdoor and d irect-v ent  
dipswitch settings still need to be set to the same settings on all the units.  
 
Wrong connection 
between the “ CHILD” 
unit and the remote 
controller  
PARENT unit CHILD unit 
Remote controller 
910 
(T-M50) 
Cold IN Hot Out 
Multi-unit 
controller  
						

							 - 28 - 
Multi-Unit System Connection Diagram  
The water heaters with a multi-unit controller   and a remote controller wiring:  
 
 
 
 
               
 
                          
 
 
  
   
•  The  above  connection diagram is an example of how to connect 4 water heater s together in 
a Mu lti-Unit System.  Up to 10 water heater s can be connected in this fashion. 
•   Make  sure th e “7-seg LED” of computer board  of each unit  display s the unit #.   The  multi -u nit 
controller  automatically allocates  the unit #  (1 to 10)  to each water heater in a Multi -U nit  
system.  
•   The dark squares indicate the direction  the dipswitches should be set to.  
 
Please refer to the  multi -u nit  controller ’s  manual for  additional information and instruction. 
 
 
 
 
 
 
 
 
 
 
 
.  
Available multi-unit controllers with a remote controller 
9007675005 ( TM-MC01) 
(comes with 9007603005 ( TM-RE30 )) 
9008300005 ( TM-MC02 ) 
(comes with 9008172005 ( TM-RE40 )) 
The Comunication Cables are included with the 910 (T-M50). The 
Cables use 18 gage wire and can  be up to 250 ft. long all together.  
Easy-Link / Multi-Unit 
System connectors are 
on each unit’s 
computer board  
7-Seg LED 
Lower bank of 
dip switch es  
Upper bank of 
d ip switch es  
This lamp will flash when the unit is allowed the operation. 
 
Unit 1                   Unit2                    Unit3                    Unit4               
Remote 
 controller 
Multi-unit 
controller  
C om munication cable
PARENT
PARENT
PARENT
PARENT
OFF
O
N
12345678L owe r bank of Dipswitch
OFF
O
N
12345678Lo wer bank of Dipswitch
OFF
O
N
12345678Low er bank of Dipswitch
OFF
O
N
12345678L ow er bank o f Dipswitch
11
22
11
22
11
22
11
22
Con nectors Con nectors Connectors
Connectors 
						

							 - 29 - 
 INITIAL OPERATION 
 
 
•   Check the GAS and WATER CONNECTIONS  for leaks  before firing it for the first time.  
•   Open the main gas supply valve to the unit using only your hand to avoid any spark.  
Never use tools. If the knob will not turn by hand, do not try to force it; call a qualified 
service technician. Forced repair may result in a fire or explosion due to gas leaks.    
•   Be sure to check next to the bottom of the unit because s ome gases are heavier than air 
and may settle towards the floor.  
•   Check the GAS PRESSURE. Refer to p. 16.  
•   Do not try to light the burner manually . It is equipped with an electronic ignition device 
which automatically lights the burner.  
•   Check for PROPER VENT ING and COMBUSTIBLE AIR  to the heater. 
•   Purge the GAS and WATER LINES  to remove any air pocket.   
•  Do not use this appliance  if any part has been submers ed under water. Immediately 
contact  a  qualified installer or service agency  to  replace  a flooded  water heater . Do not 
attempt to repair the unit!  It must be replaced!   
CAUTION:  IF YOU SMELL GAS: 
•  Do not try to start the water heater.  
•   Do not touch any electric switch; do not use any phone in your building.  
•  Immediately call your gas supplier from a neighbor’s  phone. Follow the gas supplier’s 
instructions. 
• If you cannot reach your gas supplier, call the fire department. 
 
1. Once the above checks 
have been completed, 
please clean filter of any 
debris. Refer to  p. 34 for 
instructions.  
2. Fully open the manual 
water control valve on the 
water supply line.  
 
 
   
 
   
3. Open a hot water  fixture 
to verify t
hat water is 
flowing to that fixture .  
 
 
 
 
 
 
Then close the hot water 
fixture. 
4.  Fully open the manual 
gas control valve 
installed.   
 
 
5. Turn on the 120 volt  60 Hz 
power supply to the  water 
heater.  
 
6. Now you are ready to 
enjoy hours of endless 
hot water.  
 
 
FOR YOUR SAFETY, READ BEFORE OPERATING:  
						

							 - 30 - 
(Unit: °F) Temperatures available under the High Temperature Mode*  (Refer to p. 31 for details.) 
 
(Unit: °F) 
2. Press  the  HOT/COLD  button  to  set                                                                                             
the  water temperature up to 120  °F (50 ° C). 
NORMAL OPE RATION 
•  Flow rate to activat e the 910 (T -M50)          :  0. 5 gallon per minute  
•   Flow rate to keep the  910 (T -M50)  running : 0. 4 gallon per minute  
 
WITHOUT REMOTE CONTROLLER  
1. Open a cold water 
fixture. 
 
2. Mix hot water with the cold water to 
get the suitable  temperature water.  
 
 
 
 
3. When finished, close 
the  water fixture. 
 
 
 
 
WITH REMOTE CONTROLLER  INSTALLED : 9007603005  (TM -RE30)  (Option al) 
1. Press the power ON/OF F button.                                     
 
 
 
 
   
 
 
 
Increasing temperature from 120  °F (50  °C) to  140  °F (60  °C)  
• Press the “ HOT” button to set 120 °F  (50  °C).  
• Press and hold the “ INFO” button and the “ HOT” button for at  least 3 seconds.  The re mote will emit 
  a beep and change to  125 °F (52  °C) . 
•  Press the “ HOT” button to set up to  140 °F (60  °C).  
Increasing temperature above  140  °F (60  °C)   
• Press the “ HOT” button to set 140 °F  (60  °C).  
• Press and hold the “INFO ” button and the “ HOT” button for at  least 3 seconds.  The remote will emit  
  a beep and change to 145  °F (63  °C) . 
•  Press the “ HOT” button to set up to  175 °F (80  °C)  or  185  °F  (8 5 ° C) . 
1 10 1 15 1 20 1 25 1 30 1 35 1 40 1 45 1 50 1 55 1 60 1 65 1 70 1 75 1 80 1 85 
WARNING  
Hot Water temperatures over 125  ° F  (52  ºC)  can cause severe burns instantly or death from 
scalding.   
• The outlet hot water temperature of the water heater is factory set  at 120 ° F  ( 50  ºC).   
• Feel the water temperature before bathing or showering. 
100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 
(EX: 110°Ｆ) 
The temperature and the 
time  will be displayed on 
the remote controller.  
Temperatures available under the Default Mode 
3. Open a cold water fixture.  
    Mix hot water with the  cold water to get the 
suitable temperature water. 
4. Close the water fixture. 
When ON, 
green LED is lit.  
Lamp is OFF Lamp is ON