Takagi T-K3 User Manual

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PRESSURE RELIEF VALVE
The Flash T-K3/T-K3-Pro has a high-temperature shut off switch built in as a standard safety
feature (called a Hi-Limit switch) therefore a “pressure only” relief valve is required.
1. This unit does not come with an approved pressure relief valve.
2. An approved pressure relief valve must be installed on the hot water outlet.
3. The pressure relief valve must conform to ANSI Z21.22 or CAN 1-4.4 and installation must
follow local code.
4. The discharge capacity must be at least 199,000 BTU/hr.
5. The pressure relief valve needs to be rated for a maximum of 150 psi.
6. The discharge piping for the pressure relief valve must be directed so that the hot water
cannot splash on anyone or on nearby equipment.
7. Attach the discharge tube to the pressure relief valve and run the end of the tube to within
6" from the floor. This discharge tube must allow free and complete drainage without any
restrictions.
8. If the pressure relief valve installed on the T-K3/T-K3-Pro discharges periodically, this may
be due to a defective thermal expansion tank or defective pressure relief valve.
9. The pressure relief valve must be manually operated periodically to check for correct
operation.
Hot outlet Cold inlet
Gas
Pressure Relief
Valve
As Close as
Possible

Takagi T-K3 Specifications

General

Type	Tankless
Installation Type	Indoor
Maximum BTU Input	199, 000 BTU/h
Gas Connection Size	3/4"
Vent Size	3"
Hot Water Flow Rate (at 35°C rise)	6.6 GPM
Maximum Input	199, 000 BTU/h