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© 2021 Mitsubishi Electric US, Inc.
Specifications are subject to change without notice.
Hydronic Heater
3
2
No
Home
Program
NEXT
Outside air temperature: 71°
Should the fan in the Bedroom
indoor unit run when the backup
heater runs?
For duct-heaters,select Yes
Yes
Hydronic
Settings
Home
Program
NEXT
Hydronic Heater
Heater 2
At what outdoor temperature should
the heat pump run with the hydronic
heater as a second stage?
Never
15° and below
20° and below
25° and below
Hydronic Heater
Settings
Home
Program
NEXT
30° and below
Heater 2
At what outdoor temperature should
the heat pump run with the hydronic
heater in tandem?
Never
15° and below
25° and below
30° and below
20° and below
1
Warning
: Homeowners should not rely upon the hydronic heater as a backup heater as the hydronic heater
may not operate when the heat pump is locked out due to low ambient conditions.
Add kumo station
®
Accessory. See the
Add kumo station Accessory
section.
Note:
●
The hydronic heater cannot be used with another in-duct accessory.
●
In case of multi-position units, for proper functioning of in-duct backup heaters, ensure that the heating
offset is disabled. To do this
,
a. Go to
Settings
>
System Setup
>
Installer Settings
.
b. Enter 9999 for installer login.
c. Select the required site and then the required zone.
d. Tap
Advanced
.
e. For
Enable Heating Mode Temperature Offset?
, select
No
.
1. Verify that the outside air temperature value is valid. If not, install and/or reposition the temperature
sensor. Select
Yes
to confirm that the indoor unit fan should be interlocked with the hydronic heater.
Note: Only the indoor unit physically attached to the kumo station (if any) can be interlocked with the heater.
Tap
NEXT
.
The
Thermal Off
screen, with
Stop in Heat
automatically selected, is displayed.(Not shown).
2. Move through to the next screen and select the outdoor temperature at which the heat pump should run
with the hydronic heater as a second stage heater. Tap
Next
.
3. Select the outdoor temperature at which the heat pump should run in tandem with the hydronic heater.
Tap
Next
.