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DLY (DELUXE) SERIES HYDRONIC CASSETTE
.
39
7.
4 PIPE UNIT WITH MTV1 AND MTV2
1) COOL
MODE
1)
MTV2 and heater always off.
2)
If Tr >= Ts+1ºC, cool operation is activated, MTV1 is turned on. Indoor fan runs at set speed.
3)
If Tr = Ts, cool operation is terminated, MTV1 is turned off. Indoor fan runs at set speed.
4)
The range of Ts is 16-30 ºC
5)
Indoor fan speed can be adjusted for low, medium, high and auto.
6)
When turned on, MTV1 requires 30 seconds before it is fully open.
7)
When turned off, MTV1 requires 120 seconds before it is fully closed.
8)
When the unit is turned off, indoor fan will delay for 5 seconds before it is turned off.
LOW TEMPERATURE PROTECTION OF INDOOR COIL
1) If
Ti1
̰
2 ºC for 2 minutes, MTV1 is turned off. If indoor fan is set for low speed, it will run at medium
speed. If it is set at medium or high speed, it will keep running at the same speed.
2) If
Ti1
̱
5ºC for 2 minutes, MTV1 is turned on. Indoor fun runs at set speed.
2) FAN
MODE
1)
Indoor fan runs at the set speed while heater, MTV1 and MTV2 are turned off.
2)
Indoor fan speed can be adjusted for low, medium and high.
3) HEAT
MODE
1)
MTV1 and heater always off.
2)
If Tr <= Ts
ε
1 ºC, heat operation is activated, MTV2 is turned on. Indoor fan runs at the set speed.
3)
If Tr >Ts, heat operation is terminated, MTV2 is turned off.
Indoor fan repeatedly runs at low fan speed for 30 seconds and stops for 3 minutes.
4)
The range of Ts is 16~30 ºC
DŽ
5)
Indoor fan speed can be adjusted for low, medium, high and auto.
6)
MTV2 will delay for 30 seconds before it is turned on.
7)
MTV2 will delay for 120 seconds before it is turned off.
i.
PRE-HEAT
1)
If Ti2<36 ºC [or 28C depends on S5 setting], when MTV2 is on, indoor fan remains off.
2)
If Ti2>=38 ºC [or30C depends on S5 setting], when MTV2 is on, indoor fan runs at set speed.
3)
If indoor coil temperature sensor is damaged, pre-heat time is set for 2 minutes and indoor fan runs
at set speed.
ii.
POST-HEAT
1) If
Ti2
̱
38ºC, when MTV2 is off, indoor fan continues to run at set speed.
2)
If Ti2<36ºC, when MTV2 is off. Indoor fan runs 30 seconds and stop 3 minutes repeatedly.
3)
If indoor coil temperature coil is damaged, post-heat time is set for 3 minutes with indoor fan running
at set speed.
iii.
OVER HEAT PROTECTION OF INDOOR COIL
1)
If Ti2 >= 75 ºC, MTV2 is turned off, indoor fan remains on and runs at set speed.
2)
If Ti2 <70 ºC, MTV2 is turned on, indoor fan remains and runs at set speed.
3)
If indoor coil temperature sensor is damaged, the protection mode will become obsolete and the unit
will work as the Pre-heat and Post-heat set times.
4) DEHUMIDIFICATION
MODE
1)
MTV2 and heater always off.
2)
If Tr >= 25 ºC, MTV1 will be ON for 3 minutes, and OFF for 4 minutes.
3)
If 16 ºC < =Tr < 25 ºC, MTV2 will be ON for 3 minutes, and OFF for 6 minutes.
4)
If Tr <16 ºC, MTV1 will be turned off for 4 minutes.
At the end of the above dehumidification cycle, system will decide the next dehumidification control option.
Indoor fan will run at low speed throughout the dehumidification process.
5) AUTO
MODE
i. The cool and heat operation will be selected automatically depending on the Tr and Ts.
ii. If auto mode is in cool operation, the operation will only change to heat if Tr<Ts-1ºC and MTV1 stop
for 3 min.
SAKURA - Total Air Conditioning Solution