91
b. EVO-50R/ 60R/ 80R/ 95R/ 120R/ 150R
-
Loosen the bolts, remove the electrical heater until you reach the reset button and
push the reset lever upward for manual
reset
. (Fig. 68)
Manual reset:
Manual reset temperature is 90
o
C. When the safety temperature limiters reach the 90
o
C, safety temperature
limiter is triggered, and preheater will be disconnected from the power supply.
If the manual reset is active, there is most likely a problem with the heater. Manual reset is only
to be pushed if problem is identified and solved.
Automatically reset:
Automatically reset temperature is 70
o
C. When the safety temperature limiters reach the 70
o
C, safety
temperature limiter is triggered, and preheater will be disconnected from the power supply.
When the temperature falls below
70
o
C
, the electrical heater will automatically switch on.
7.3 Electrical pre heater
7.3.1 Functional description of electrical pre heater
Electrical pre heater is used for increasing the outdoor air temperature. A pre-heater prevents the rotary heat exchanger from
freezing! It is controlled by steplessly in order to decrease the energy consumptions.
The pre-
heater is equipped with two safety temperature limiters, the STL (auto reset = trigger temp. +70 °C) and (manual reset
= trigger temp. +90 °C) are connected in series. Once a safety temperature limiter is triggered, the preheater will be
disconnected from the power supply and an error will be displayed on the controller.
- Preheater enabling/disabling
Enabling/disabling of the preheater by the user/installer is possible (Refer to chapter 4.1 for commissioning)
The preheater only works if the supply air fan is operating and there are no errors. If the unit is switched to standby or unit-off
mode, the preheater will switch off immediately. The supply air fan stops 90 seconds after the pre-heater is stopped.
Fig. 68
Summary of Contents for EVO-R
Page 1: ...EVO R COMPACT AIR HANDLING UNIT WITH ROTARY HEAT RECOVERY ...
Page 129: ...129 Fig 170 Fig 171 ...
Page 130: ...130 Fig 171 ...
Page 132: ...132 Fig 173 Fig 174 ...
Page 133: ...133 Fig 174 ...
Page 135: ...135 Fig 176 Fig 177 ...
Page 136: ...136 Fig 177 ...
Page 138: ...138 Fig 179 Fig 180 ...
Page 139: ...139 Fig 180 ...
Page 141: ...141 Fig 182 Fig 183 ...
Page 142: ...142 Fig 183 ...
Page 144: ...144 Fig 185 Fig 186 ...
Page 145: ...145 Fig 186 ...
Page 147: ...147 Fig 188 Fig 189 ...
Page 148: ...148 Fig 189 ...
Page 150: ...150 Fig 191 Fig 192 ...
Page 151: ...151 Fig 192 ...
Page 153: ...153 Fig 194 Fig 195 ...
Page 154: ...154 Fig 195 ...
Page 155: ...155 ...