Swegon BLBd Guide

BLBd
Installation – Commissioning – Maintenance 20140912
Maintenance
The mixing box is equipped with an inspection cover
made of plexiglas. The motor is coupled to the mixing
box damper blade via connecting rods and a spindle
that extends into the mixing box through a brass bush.
The inspection cover can be dismantled, as required. It is
advisable to switch off the ventilation before you disman-
tle the inspection cover.
Check the linkage system between the motor and the
damper blade. Make sure that all the parts are in place
and that screws have not come loose.
The spindle and the brass bush should be checked at
regular intervals. Make sure that the spindle runs easily
through the brass bush. Whenever the need arises the
spindle should be cleaned with appropriate degreasing
agent; then it should be oiled with a thin oil film and
wiped dry of any excess oil.
The respective service function staff must determine the
time interval for inspection. This depends on how clean
the supply air is and how the ambient environment looks.
We recommend inspection at least once a year.
We recommend lubricating the spindle with a foodstuff-
classified penetrating maintenance oil, such as Omega
638 food grade 4.
REACT
RTC
BLB
Figure 1. Description of the function of the BLB for an electric
control system in combination with the REACT and RTC.
4
3
1
2
Figure 2.
1. Brass bush
2. Spindle
3. Connecting rods
4. Plexiglas

BLB
2Swegon reserves the right to alter specications. 20140912
Wiring diagram for electric damper actuator
Connect the control signal from the room thermostat to
input Y (wire marked 3). Output U is a true value signal.
Design power consumption: 5 VA, applies to BLB motor
and RTC.
Dimensions and weights
Size Dimensions (mm)
A B C1 ød D E F V
100 210 260 139 99 198 79 60 30
125 210 310 139 124 232 94 60 30
160 210 385 139 159 284 115 60 30
200 250 450 139 199 338 136 60 30
250 300 550 139 249 406 161 60 30
315 365 660 271 314 498 194 60 30
400 450 830 271 399 612 239 60 30
Size Weight (kg)
BLB-0 / BLB-1
100 4,9
125 5,5
160 7, 0
200 8,4
250 11,3
315 18,0
400 25,0
Electric actuator control signals
The diagram below shows the mixing damper blade posi-
tion in relation to the control signal, electric. 100% denotes
full cooling. 0% denotes full heating. For the best control,
the room thermostat should be set for mixing box control,
i.e. have its neutral position at 5V. On the RTC, this func-
tion can be selected using the LUNA T-CU hand-held termi-
nal. See the commissioning instructions for the RTC.
Figure 4. Dimensions, BLB.Figure 3. Wiring diagram, BLB with electric motor.