John Wood Takagi - 910 - Manual (Page 4)

4
Combustion Sections Within The 910
Right combustion
section Left combustion
section
The 910 contains two combustion sections. The section that
turns on first is whichever section the 910 decides is the
primary section. The moment at which the secondary sec-
tion fires will depend on the total flow rate and set tempera-
ture of the water heater:
Flow rate at which the sec-
ondary section fires in
l/min (GPM (US))
Set temperature of
the 910 in °C (°F)
12 (3.2) 38-49 (100-120)
11 (2.9) 52, 54 (125,130)
9.8 (2.6) 60 (140)
9 (2.4) 63, 65.5 (145,150)
8 (2.1) 68-85 (155-185)
Example:
If the set temperature is 49°C (120ºF):
The section(s) in operation is indicated by the black
square(s).*
910 910 910 910
OR
Total Flow < 1.9
l/min (0.5 GPM)
(no section fi res)
1.9 l/min (0.5 GPM) < Total
Flow < 12 l/min (3.2 GPM)
(only primary section fi res)
Total Flow > 12 l/min
(3.2 GPM)
(both sections fi re)
Depending on which side is the primary section
* The primary and secondary section will reverse roles every
100 firing cycles or every 12 hours of unit operation.
SAFETY GUIDELINES
DANGER
Indicates an imminently hazardous situa-
tion which, if not avoided, will result in death
or serious injury.
WARNING
Indicates an imminently hazardous situa-
tion which, if not avoided, could result in
death or serious injury.
CAUTION
Indicates an imminently hazardous situa-
tion which, if not avoided, could result in
minor or moderate injury.
WARNING
Installation and service must be per-
formed by a qualified installer (for exam-
ple, a licensed plumber or gas fitter),
otherwise the warranty by the manufac-
turer will be void.
The installer (licensed professional) is
responsible for the correct installation
of your water heater and for compliance
with all national, state/provincial, and
local codes. •
•
PLEASE READ THIS MANUAL CAREFULLY AND FOLLOW
ALL DIRECTIONS.
General
1. Follow all local codes, or in the absence of local codes,
follow the most recent edition of CSA B149.1 Natural
Gas and Propane Installation Code.
2. Properly ground the unit in accordance with all local
codes or in the absence of local codes, with CSA stan-
dard C22.1 Canada Electrical Code Part 1.
3. Carefully plan where you intend to install your 910 Water
Heater. Please ensure:
Your water heater will have enough combustible air
and proper ventilation.
Locate your heater where water leakage will not
damage surrounding areas (refer to pg. 5).
4. Check the rating plate for the correct GAS TYPE,
GAS PRESSURE, WATER PRESSURE and ELECTRIC
RATING.
* If this unit does not match your requirements, do not
install and consult with the manufacturer.
5. If any problem should occur, turn off all hot water taps
and turn off the gas. Then call a trained technician or the
Gas Company or the manufacturer.
•
•