Indoor Unit Functional Concept
SiBE28-804
56
Functional Description
2.4
Draft Avoidance Control 1
Purpose
Avoid draft for the customer by delaying transfer of the flap to the Po0 (horizontal) position for a
certain amount of time when defrosting and in heating thermostat OFF.
Heating
thermostat OFF
The time chart below illustrates the draft avoidance control 1 in heating thermostat OFF.
Defrosting
The time chart below illustrates the draft avoidance control 1 in defrosting.
Used inputs
The draft avoidance control 1 uses the following inputs:
When the flap starts to move, there can be
a draft. The fan speed decreases to LL
speed but it takes some time because of
its inertia.
Fan
Flap
Thermostat
Setting
LL
Setting
Po0
ON
OFF
Flap motor starts
to drive the flap.
20 s
Flap moves from
setting position to Po0
Po0
When the flap starts to move, there can be
a draft. The fan speed decreases to LL
speed but it takes some time because of
its inertia.
Fan
Flap
Defrosting
Setting
Off
Setting
Po0
Yes
No
Flap motor starts
to drive the flap.
20 s
Flap moves from
setting position to Po0
Po0
Input
Connection on
indoor PCB
Connection on
outdoor PCB
Limit switch for flap
33S
—
No. of fan turns
X26A
—
Outdoor heat exchanger thermistor (defrost control)
—
R2T
Summary of Contents for FHQ100BUV1B x 2
Page 13: ...SiBE28 804 2 ...
Page 19: ...Model Name and Power Supply SiBE28 804 8 General Information ...
Page 29: ...Specifications SiBE28 804 18 Specifications ...
Page 33: ...Wired Remote Controller SiBE28 804 22 Remote Controller 1 2 Installation ...
Page 34: ...SiBE28 804 Wired Remote Controller Remote Controller 23 ...
Page 93: ...Outdoor Unit Fan Speed Control SiBE28 804 82 Functional Description ...
Page 131: ...Test Run and Operation Data SiBE28 804 120 Test Operation ...
Page 251: ...Troubleshooting by Remote Controller Display LED Display SiBE28 804 240 Troubleshooting ...
Page 277: ...PCB Layout SiBE28 804 266 Appendix ...
Page 297: ...RZQ100 140C7 RZQS125 140C7V1B SiBE28 804 286 Removal Procedure ...
Page 311: ...SiBE28 804 iv Index ...