Johnson Controls YORK YHMH 20 Notice D'instructions page 30

YHMY range – electrical connections
Electrical connections of several appliances with York wall-mounted controls.
At the most 4 appliances of the same capacity can be connected together.
20° °C
20° °C
KEY
YHMY YHMY board
TR TR control board
ATR ATR control board
TMM Remote season changeover
E Water solenoid valve (two-pipe system)
8
GB
TR without valves
1 2 3 4 5 6 7 8 1 2
MC1 MC2
TR
N
L
PE
TR with 1 valve
1 2 3 4 5 6 7 8 1 2
MC1 MC2
TR
N
L
PE
ATR without valves
1 2 3 4 5 6 1 2
MC1 MC2
ATR
N
L
PE
ATR with 1 valve
1 2 3 4 5 6 1 2
MC1 MC2
ATR
N
L
PE
YHMY YHMY
5 4 2 N 5 4 2 N
CH
1 2
MC3
YHMY YHMY
5 4 2 N 5 4 2 N
E
CH
1 2
MC3
YHMY YHMY
5 4 2 N 5 4 2 N
CH
1 2
MC3
YHMY YHMY
5 4 2 N 5 4 2 N
E
1 2
CH
MC3
YHMY YHMY
5 4 2 N 5 4 2 N
YHMY YHMY
5 4 2 N 5 4 2 N
E E E
YHMY YHMY
5 4 2 N 5 4 2 N
YHMY YHMY
5 4 2 N 5 4 2 N
E E E