Initialization time
LED
How to operate
Names of components of controller
Lighting upon verifying and setting initial fuel
feed time andAutomatic recovery to water
temperature indication after 5 sec.
Warning
display
<8P connector>
1 Internal CP
power
2 CH CP
power
4 Fuel feed
6 Internal CP COM
7 CH CP COM
8 Fuel feed COM
Heater power
power
<12P connector>
1 Overheat
2 Infrared
3 ROOM(-)
4 ROOM(+)
5 VOD
6 Low level
7 Water temperature
8 GND (water
temperature, overheat)
9 GND (infrared)
10 Empty
11 Liquefied overheat
12 Low level ground
1 Heater monitoring, 2 GND
3 GND, 4 Fuel supply sending
Power distribution
switch
Display connector
External
start contact
Capacity
setting switch
Exhaust power
How to operate
Name
NO
Function
Remarks
Power
/restart
Setting
Fuel feed
ON/OFF
Blower
ON/OFF
UP/
DOWN
Fuel feed
LED
Blower LED
Fuel
feed
Operation time
LED
LED
Shutdown time
Operation/warning
LED
LED display
Used for power
supply and restart
Fan off upon main power off
Fan off after 10 minutes
upon room power off
Used for initializing, starting,
shutdown, and fuel time setting
Keep pressing the button for 5 sec.
when setting.
Main
power
ON
Main
power
OFF
Main
power
ON
Main
power
OFF
Inoperable
Keeping pressing the button for 5 sec
– converted into manual mode
Keeping pressing the button for 5 sec.
– converted into manual mode
(FND OFF in manual mode)
Keeping pressing the button for 5 sec.
– converted into manual mode
(FND OFF in manual mode)
Allowed to turn on/off fuel feed`
manually in manual mode
Fuel supply kept ON for 3 min. only in
manual mode
Allowed to turn on/off exhaust fan
manually in manual mode
Release upon turning the power
button on/off
Used for verifying and setting
initialization, start, shutdown fuel time
Lighting upon fuel feed ON
Lighting upon blower ON
Lighting upon verifying and setting fuel feed and
operation time Automatic recovery to water
temperature indication after 5 sec.
Lighting upon verifying and setting fuel feed and
operation time Automatic recovery to water
temperature indication after 5 sec..
Lighting upon operation or
warning
Indicating water temp., initialization, operation,
shutdown time, safety triggering
Setting initialization, start and
shutdown time
Setting
Setting
Setting
17 sec
1 sec
13
Flashing upon warming (0.5 sec. ON,
0.5 sec. OFF)
Indicating in order of 1°C (0°~99°C)
45°C
(summer)
55°C (fall)
65°C
(spring)
75°C (early
winter)
85°C (winter)
Water temp.
setting
(CTR-5700)
Operating temperature of blower, exhaust fan, and circulation pump at individual
settings of water temperature (water temperature set at CRT5700PLUS)
Blower
Circulation pump
Remarks
38°C or lower
48°C or lower
50°C or higher
55°C or lower
65°C or lower
75°C or lower
39°C or lower
57°C or lower
67°C or lower
75°C or lower
49°C or lower
55°C or higher
65°C or higher
75°C or higher
85°C or higher
45°C or higher
55°C or higher
65°C or higher
30°C or higher
35°C or higher
Содержание KRP-20A
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