Brochure

18
Installation Type Indoor, Outdoor, Direct Vent
Dimension 20-1/4” (H) X 13-3/4” (W) X 9-1/2” (D) , Weight: 37 lbs
Electric 120 V 76 W / 0.8 A (Operation) 6 W / 0.08 A (Standby) 131 W / 1.1 A (Freeze-Protection)
Ignition Electronic Ignition
Noise Level IN: 54 dB OS: 58 dB at Max output
Fuel NG
Gas Consumption
Min. Input 15,000 BTU/h
Max. Input 190,000 BTU/h
Energy Factor 0.82
Gas Pressure
Min 5.0" W.C.
Max 10.5" W.C.
Flow Rate 8.0 GPM
Values based on factory testing. 0.4 GPM required for continuous fire after
initial ignition
Hot/Cold/Gas
Connection
3/4" NPT
Coil Capacity ≈0.2 Gallons
Water Pressure 15-150 PSI
Pressure Only Relief Valve Requires (Min 190,000 btu/h, 150 PSI).
40 psi or above recommended for max. flow
Multiple Unit
Installation
Easy-Link System N/A N/A
Multi-Unit System N/A N/A
K4U
Temperature Settings
Dipswitches 120°F (default) 140°F
With 9009069005 remote (max. distance 400’ from heater, non-polarized 20 gauge wiring.)
120°F to 140°F (9 options), 120°F Default Factory Setting
Clearances to Combustible
and Non-Combustible
Surfaces
Warranty Information**
Residential Use:
15 Years limited heat exchanger,
5 Years limited parts
**Refer to www.takagi.com for further warranty
details.
Provides a variety of installation
options: indoor, outdoor, and direct
vent. Complies with Ultra-Low NOx
regulations.
Indoor
Installations
Outdoor
Installations
K4U: Flow Rate vs. Temperature Rise
K4U: Pressure Loss
Specifications
Clearance
310: Flow Rate vs. Temperature Rise
140120100806040200.0
8.0
9.0
7.0
6.0
5.0
1.0
2.0
3.0
4.0
0
310: Pressure Loss
Flow Rate (gpm)
Head (ft)
100
110
120
70
60
90
80
50
40
30
10
20
0
8.0 10.06.0402.00.0
50
45
40
35
30
25
20
15
10
5
0
Pressure Loss (psi)
Indoor models include both a remote control
and power cord as standard features.
Outdoor models include remote control as a
standard feature.
Side 3
Side 3
Side 3
Side 3
Front 4“
(Recommended 24 “
for maintenance)
Side 3
Side 3
Side 3
Side 3
Front 4“
(Recommended 24 “
for maintenance)