Electrical Connections; Access To Connection Block; Main Supply Connection - ECR International COMBI 115 Installation, Operation And Maintenance Manual

! D AN GER
Elect rocut ion Hazard! HI GH VOLTAGE - Connect ions
in t erm inal block M1 are high volt age ( 120V / 60Hz) .
Before m aking connect ions, verify appliance is
disconnect ed from power supply. Respect t he input
polarity on t erm inal block M1: L ( LI NE) - N ( NEUTRAL) .
Failure t o follow t hese inst ruct ions WI LL result in deat h
or serious inj ury.
8 .3 Access To Connect ion Block
1.
Ensure t here is no line volt age at boiler.
2.
Unscrew t wo screws locat ed under front panel. Rem ove
front cover.
3.
Guide cont roller or t herm ost at wire t hrough round
grom m et ( s) on right side of boiler's bot t om plat e.
4.
Tilt cont rol box forward by opening holding clip locat ed on
left side of cont rol housing.
5.
Expose M1 and M2 t erm inal blocks by rem oving screw
from plast ic cover on left . See Figure 8- 3.
6.
Rem ove plast ic from channel in plast ic cover. Run wires
t hrough new opening.
7.
Connect wires t o appropriat e t erm inals on connect ion
block.
8.
Tilt cont rol box back t o original posit ion. Ensure clip on
left side is fully engaged.
9.
Replace front cover and screws under front panel.
10.
Turn power t o boiler on.
Dry cont act end swit ches from various m anufact urers can be
at t ached t o boiler cont rol PCB.
8 .4 M a in Supply Connect ion
Main supply is connect ed t o t erm inal block M 1 which is high
volt age ( 120V / 60Hz) .
Fuses, 3.15 A, are incorporat ed in t he power supply t erm inal
block. To check or replace fuse pull out fuse carrier.
TERM I N AL BLOCK M 1
( L) = Line ( brown)
( N) = Neut ral ( light blue) .
= Ground ( yellow- green) .
( 1) ( 2) = cont act for 120V Room Therm ost at .
Place j um per back on t erm inals 1- 2 of boiler t erm inal block
M 1 if room t herm ost at is not used.
8 - ELECTRI CAL CON N ECTI ON S
FI GURE 8 - 2 Term ina l Block Loca t ions
FI GURE 8 - 3 Term ina l Pla st ic Cover w it h Knock out s
TERM I N AL BLOCK M 2
Term ina ls 1 - 2 : Buss connect ion of Open Therm Gat eway
Term ina l 3 : not used on Com bi unit s
Term ina ls 3 - 4 : indirect st orage t ank sensor connect ion
for heat- only boilers
Term ina l 4 - 5 : out door t em perat ure sensor connect ion
( supplied as an accessory)
Term ina ls 6 - 7 - 8 : 24V room t herm ost at connect ion
Term ina ls 9 - 1 0 : 0 - 10V connect ion
4 4
Fuse Holders ( 2)
Rem ove
New Opening
240013687 REV A [ 09/ 01/ 2022]