● Remove the transit bolt by unscrewing the screw from the bottom of the unit’s plate.
● The transit bolt has an M8 thread and a 13 mm hexagonal head.
Switches and fuses
RE 28–48
Marking
Function
Default
position
1S1
Operating switch ON/OFF
ON
1FI
Compressor motor protection
ON
F3
Control fuse (automation system’s fuse)
ON
1F4
Condenser circuit pump Q9’s fuse
ON
1F5
Evaporator circuit pump Q8’s fuse
ON
F6
Heating circuit 1 pump Q2’s fuse
ON
F7 (Optional)
Heating circuit 2 pump Q6’s fuse
ON
RE 56–96
Marking
Function
Default
position
F3
Control fuse (automation system fuse)
ON
S1
Operating switch ON/OFF
Upper unit (master)
ON
S2
Operating switch ON/OFF
Lower unit (slave)
ON
1F1
Compressor motor protection
Upper unit (master)
ON
2F1
Compressor motor protection,
Lower unit (slave)
ON
1F4
Condenser circuit pump Q9’s fuse
Upper unit (master)
ON
1F5
Evaporator circuit pump Q8’s fuse
Upper unit (master)
ON
2F4
Condenser circuit pump Q9’s fuse
Lower unit (slave)
ON
2F5
Evaporator circuit pump Q8’s fuse
Lower unit (slave)
ON
F6
Heating circuit 1 pump Q2’s fuse
ON
F7 (optional)
Heating circuit 2 pump Q6’s fuse
ON
Operating switches
RE 26–48: operating switch S1; RE 56–96: operating switch S1 and S2
When the switch is in position 1/ON, the unit is in normal operating mode. When
the switch is in position 0/OFF, the compressor is prevented from starting, while the
heat pump’s automation system stays operational. The frost protection function is an
exception to this: it starts the in-line heater and the compressor’s condenser circuit
when the temperature falls below 5 °C, even if the switch is set to 0/OFF.
If the condenser circuit’s temperature is below 5 °C and you do not want the
compressor to start, set the compressor motor protection circuit breakers to the OFF
position.
M8009 2147EN
13 (74)
Summary of Contents for RE 28 05
Page 1: ...M8009 2147EN 25 October 2021 Installation and operation manual RE 28 48 RE 56 96...
Page 2: ......
Page 45: ...RE 04 dimensions single unit configuration Two units M8009 2147EN 43 74...
Page 46: ...RE 04 dimensions two unit configuration 44 74 M8009 2147EN...
Page 61: ...7 4 EN 14285 Technical data sheets RE 28 RE 28 Technical data sheet ver 1 M8009 2147EN 59 74...
Page 62: ...RE 33 RE 33 Technical data sheet ver 1 60 74 M8009 2147EN...
Page 63: ...RE 38 RE 38 Technical data sheet ver 1 M8009 2147EN 61 74...
Page 64: ...RE 42 RE 42 Technical data sheet ver 1 62 74 M8009 2147EN...
Page 71: ...Wilo Stratos 40 1 12 Wilo Yonos MAXO 40 0 5 16 M8009 2147EN 69 74...
Page 77: ......
