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Outline of Control (Indoor Unit)
SiUS281811EA
136
Part 4 Functions and Control
Note(s)
6.9 Heater Control (Except FTQ-TA Models)
Optional PCB KRP1B... is required for heater control.
Heater control is conducted in the following manner.
Normal control
While in heating operation, heater control (ON/OFF) is conducted as shown on the right.
Overload control
When the system is overloaded in heating operation, the heater will be turned OFF in the following
two manners.
(1) Heater control (ON/OFF) is conducted through the liquid pipe temperature (R2T) of the indoor
unit.
(2) Heater control (ON/OFF) is conducted by converting the heater temperature into the
condensing pressure equivalent saturated temperature (Tc) according to the temperature detection
through the high pressure sensor (S1NPH) of the outdoor unit.
Fan residual operation
When the heater turns OFF, in order to prevent the activation of the thermal protector, the fan
conducts residual operation for a given period of time after the heater turns OFF. (This operation is
conducted regardless of whether or not a heater is equipped.)
Residual operation time: 100 seconds on ceiling suspended type or 60 seconds on other types
e
r
u
t
a
r
e
p
m
e
t
t
e
S
N
O
OFF
2ºC
(3.6˚F)
2ºC
(3.6˚F)
ON
43ºC
(109.4˚F)
50ºC
(122˚F) Liquid pipe temperature
OFF
ON
50ºC
(122˚F)
60ºC
(140˚F)
OFF
Condensing pressure
equivalent saturated
temperature
Summary of Contents for SkyAir RZR-TA Series
Page 1: ...Service Manual Cooling Only 60 Hz Heat Pump 60 Hz RZR TA RZQ TA Series SiUS281811EA...
Page 202: ...SiUS281811EA 196 Part 6 Service Diagnosis 5 15 Fan Motor Connector Check for FTQ TA 311...
Page 323: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 317 RZR18 24TAVJUA RZQ18 24TAVJUA 3D124495...
Page 327: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 321 FHQ18 24 30PVJU FHQ36 42MVJU 3D048116C...
Page 328: ...Wiring Diagrams SiUS281811EA 322 Part 7 Appendix FAQ18 24TAVJU 3D114844B...
Page 329: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 323 FBQ18 24 30 36 42 48PVJU 3D065984J...