HTW-81-FN7-Munti-Stage thermostat is a device for indoor temperature control. It is mainly applied to the heat pump systems for heating/cooling, with 3 modes easily switchable: Schedule, Hold, and Holiday. The device is of high reliability and practicability, and it can support up to a 3H/2C system.
Safety Information
To protect yourself and others from danger and to protect the device from damage, please read the safety information before using it.
Important!
CAUTION: Cut off the power supply at the circuit breaker or fuse before installation to avoid fire, shock, or death!
Wiring diagram
Wiring Terminals
Terminals | Explanation | Remark |
RC | Cooling power (two transformers) | Joined with R by jumper (one transformer) |
R | Heating power (two transformers) | Joined with RC by jumper (one transformer) |
W (O/B) | Heat output | Changeover valve output (heat pump) |
Y | Cool output | Compressor output (heat pump) |
G | Fan output | |
C | 24VAC common | Connect only when AC power |
Y2 | Cool output 2 | 2nd stage compressor output (heat pump) |
W2(AUX) | Heat output 2 | Auxiliary heat output (heat pump) |
Controlling Type
No. | Type | Terminals | Wiring | Compressor delay |
0.0 | 1H/1C (conventional) | R、G、W、Y | Diagram conventional systems | none |
1.0 | 1H/2C (conventional) | R、G、W、Y、Y2 | none | |
2.0 | 2H/2C (conventional) | R、G、W、Y、W2、Y2 | none | |
3.0 | 2H/1C (conventional) | R、G、W、Y、W2 | none | |
4.0 | 1H/1C (heat pump) | R、G、O/B、Y | Diagram heat pump systems | 1 min (default) |
5.0 | 2H/1C (heat pump) | R、G、O/B、Y、AUX | 1 min (default) | |
6.0 | 2H/2C (heat pump) | R、G、O/B、Y、Y2 | 1 min (default) | |
7.0 | 3H/2C (heat pump) | R、G、O/B、Y、AUX、Y2 | 1 min (default) |
* Note: Before the operation, pls set the controlling type based on the real situation by referring to the Secret Menu (last page) and following the instruction.
Display & Buttons
Temperature format( ℃/ ℉)
In a normal display interface, press
Local time setting
Press
Local time setting
Press & hold for 3 sec to enter the interface for the local time setting. Touch to switch among Week, Hour & Minute, and then press or set the parameters of the flashing item. Press F
once, “ ” displayed, and the temperature value flashes for 5 sec. Users can choose to change the value for the temperature setting. If not, press F again to save the time value and return to the normal display.
(Local time can not be set in Hold Until mode )
Conventional system
Heat
Cool
Heat pump system
Heat (Changeover valve keep closed)
Cool (Changeover valve keep open)
After the operation of the heating/cooling system, there is a 1 min compressor off time to protect the compressor. “Wait” will display on the screen if the next operation is activated within the 1 min period.
Fan mode setting
Press
Mode setting
Press F to switch between “Schedule, Hold & Hold Until (Holiday)” modes.
Periods | Time | Temperature | Fan | |
Heating | Cooling/ Auto | |||
1 | 06:00 | 21.0℃ | 25.5℃ | Fan Auto |
2 | 08:00 | 16.5℃ | 29.5℃ | Fan Auto |
3 | 18:00 | 21.0℃ | 25.5℃ | Fan Auto |
4 | 22:00 | 16.5℃ | 28.0℃ | Fan Auto |
Factory setting Schedules: (Applied in Heat/Cool/Auto system)
Notes: In the process of time periods setting, press the button to modify Fan on or Fan Auto)
Hold
This mode comes after “Schedule” by pressing F. In this mode, the device will keep a constant temperature until the next change.
“Hold” & “ ” display and temperature value flashing. Press
Hold Until (Holiday)
This mode comes after “Hold” by pressing F again. In this mode, the device will follow the setting temperature and lasting days when users are out for a holiday. And then back to following Schedules after the holiday.
Override temperature setting
During any Schedule period, press or can enter an interface for temperature setting. Press
Sensor error “
IF FF” flashes at the temperature display area, it means the temp. the sensor is out of work(short-circuit or broken-circuit), all the outputs will be forced close, and only back to normal
work until the sensor circuit is normal again.
Resorting factory settings
Press
In Schedule Mode, long press
Table 1
Item | Explain | Range | Default | Remark |
0 | Controlling Type | 0.0-7.0 | 0.0 | See table “Controlling Type” |
1 | (1H/1C)Differential | 0.5℃/1℃/1.5℃/2℃ | 1.0℃ | |
2 | Temperature calibration | -10℃~10℃ | 0.0℃ | |
3 | Temperature setting upper limit | 0-99.5℃ | 37.0℃ | Upper limit value > lower limit value |
4 | Temperature setting lower limit | 0-99.5℃ | 5.0℃ | |
5 | Filter change reminder | 1 /2 /30 /60 /90 /120 days | 090 days | |
6 | Clock format | 12 /24 hours | 24.0 | |
7 | Compressor protection delay | 0~10min | 1.0min | |
8 | Backlight setting | ON/OF | OF | ON back-lit always on OF back-lit half bright when no operation |
9 | Temperature format | ℃/℉ | ℃ | |
Restore factory setting | OF/ON | OF | ON for restoring |
Hotowell International Co., Limited Phone:+86-592-3327332 E-mail:info@hotowell.com Add.:Building 7, Guanyinshan International Business Center, Xiamen 361000, China
DOWNLOAD MANUALS:
hotowell HTW-81-FN7 Thermostat Product Specification Guide
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