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pole 10 A (see figure beneath).The supply wire should be secured by a pull relief.
5.
It is not permissible to alter the internal wiring as fitted by the manufacturer.
6. The enable connected to numbers 1 and 2 of the strip C2 must be Volt free (also see warning un-
der 4.2.1). To set, select from the technician menu, advanced settings, CH request to Room Tstat.
The 0-10 V DC (Power or Setpoint mode) should be connected to the numbers 3 (=negative-) and
4 (=plus+) and a short wire loop should be placed between the numbers 1 and 2 of strip C2. To set,
from the technician menu, advanced CH settings, CH request select either 0-10V % (power mode) or
0-10 V SP (setpoint mode). Digital communication (open Therm OT+ version 3.0) should be connec-
ted to the numbers 1 and 2 of the strip C2. Select from the technician menu, advanced CH settings,
CH request for Room Tstat. For digital communication with EBV like RS30 or Theta an additional
communication module is required. For the internal OTC (outdoor temperature controller) a 12
kohm at 25º C (see NTC table at 6.2.2) should be connected to the numbers 5 and 6 of strip C2 and
a short wire loop should be placed between the numbers 1 and 2 of strip C2. Finally from the techni-
cian menu, advanced CH settings, CH request, select only OTC.
7. If a storage tank is connected to the boiler, the tank thermostat (or the tank NTC) should be con-
nected to the numbers 7 and 8 on the strip C2. Select from the technician menu, advanced DHW
settings, DHW request. Note that a tank NTC should be12 kohm at 25 ºC (see NTC table at 6.6.2.)
8. The CH system pump should be connected to the numbers 7 (=PE), 8 (=L), 9 (=N) on strip C1 if in
use in combination with a 3-way valve. (also see chapter 4.3). A PWM pump should be connected to
21 (=PE), and 22 (=N) on strip C1. If 230 VAC is applicable than 23,24 or 25 can be used for L.The
PWM signal should be connected to 14 (PWM signal) and 13 (PWM ground) om strip C2. From the
technician menu, system settings, boiler parameters the max and min pump speed can be set.
9.
The DHW pump (or 230 VAC 3-way valve) should be connected to 10 (=PE), 11 (=L1), and 12 (=N)
on strip C1. If a CH pump is used it should be connected to 13 (=PE), 14 (=L1) and 15 (=N) on strip
C1.
10. If the system pump, CH pump, PWM pump, DHW pump, alarm connection or the 3-way valve consu-
mes more than 0,8 A, it needs to be switched by an auxiliary relay.
11. The alarm output on the numbers 19 and 20 on strip C1 is a potential free relay output (230 VAC),
max 0,8 A).
12. The cascade/system pump output on the numbers 29 and 30 on strip C1 is a potential free relay
output (230 VAC, 0,8A).
13. The B-B (Burner Block) on the numbers 31 and 32 on strip C1 provides an external (remote) burner
block (error 76). The external contact must be a potential free contact (rated at 230 VAC).
14. The SPS_B (Burner Block) on the numbers 11 and 12 on strip C2 also provides an external (remote)
burner block (error 77). In this case the external contact must be a potential free contact (24 VDC).
15. The B-L (Burner Lock) on the numbers 9 and 10 on strip C2 provides an external burner lock (error
3). The external contact must be a potential free contact (rated at 24 VDC).
16.
The main-fuse is a circuit breaker as shown in the figure below 4 pole 10 A.
17. If the supply wire needs to be replaced, act as described under 4.
18.
Connect current carrying conductors in such a way that they become taut before earthing conduc-
tor. See figure next page.
Содержание MEGAFLEX
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