16
2 . In addition, a manual shutoff valve is also recommended
on the hot water outlet of the unit . If the water heater
is installed within, or subjected to, a closed loop water
system, a thermal expansion tank must be installed on
the return side . We recommend isolation valve sets
with hose bibs for serviceability such as flushing . See
maintenance section .
3 . Before installing the water heater, flush the water line
to remove all debris, and after installation is complete,
purge the air from the line . Failure to do so may cause
damage to the heater .
4 . There is a wire mesh filter within the cold inlet to trap
debris from entering your heater . This will need to be
cleaned periodically to maintain optimum flow .
Hot outlet
Cold inlet
Gas inlet
As close as
possible
Pressure
Relief Valve
Pressure Relief Valve
The water heater has a high-temperature shutoff switch built
in as a standard safety feature (called a Hi-Limit switch)
therefore a “pressure only” relief valve is required .
•
This unit does not come with an approved pressure relief
valve .
•
An approved pressure relief valve must be installed on
the hot water outlet .
•
The pressure relief valve must conform to
CAN 1-4.4
and
installation must follow local codes .
•
The discharge capacity must be at least 140,000 BTU/h
for the T-KJr2-IN / 110, 190,000 BTU/h for the T-K4-IN /
310, and 199,000 BTU/h for the T-D2-IN / 510 .
•
The pressure relief valve needs to be rated for a
maximum of 150 psi .
•
The discharge piping for the pressure relief valve must be
directed so that the hot water cannot splash on anyone or
on nearby equipment . Follow local codes .
•
Attach the discharge tube to the pressure relief valve and
run the end of the tube to within 152 mm (6 in .) from the
floor . This discharge tube must allow free and complete
drainage without any restrictions .
•
If the pressure relief valve installed on the water heater
discharges periodically, this may be due to a defective
thermal expansion tank or defective pressure relief valve
or it could be signs of internal scale build up .
•
The pressure relief valve must be manually operated
periodically to check for correct operation .
•
No valve may be placed between the relief valve and the
water heater .
Electrical Connections
WARNING
Follow the electrical code requirements of
the local authority having jurisdiction . In
the absence of such requirements, follow
the latest edition of
CSA C22.1 Canadian
Electrical Code, Part 1
.
CAUTION
When servicing or replacing parts within
the water heater, label all wires prior to
disconnection to facilitate an easy and error-
free re-connection . Wiring errors can cause
improper and dangerous operation . Verify
proper operation after servicing .
1 . The water heater requires
120 VAC, 60 Hz electrical
power supply that is properly grounded
.
2 . The use of a surge protector is recommended in order to
protect the unit from power surges .
