To Connect The Backup Heater Kit To The Control Box; Starting Up The System - Daikin EKMBUHCA3V3 Installation Manual

5 Starting up the system

Backup heater Connections to
type backup heater power
supply
3 kW 1~ 230 V
(*9W)
F1B
6 kW 1~ 230 V
(*9W)
L L N N
6 kW 3N~ 400 V
(*9W)
F1B
9 kW 3N~ 400 V
(*9W)
L1 L2 L3
3 Fix the cable with cable ties to the cable tie mountings.
INFORMATION
For more information on the backup heater types, and for
how to configure the backup heater, refer to the
"Configuration" chapter of the installation manual of the
outdoor unit.
During connection of the backup heater, miswiring is possible. To
detect possible miswiring on the *9W model, it is highly
recommended to measure the resistance value of the heater
elements. Depending on the different backup heater types, following
resistance values (see table below) should be measured. ALWAYS
measure the resistance on the contactor clamps K1M, K2M, and
K5M.
3 kW
1~ 230 V
K1M/1 K5M/13 52.9Ω
K1M/3 ∞
K1M/5 ∞
K1M/3 K1M/5 26.5Ω
K2M/1 K5M/13 ∞
K2M/3 ∞
K2M/5 ∞
K2M/3 K2M/5 52.9Ω
K1M/5 K2M/1 ∞
Example measure resistance between K1M/1 and K5M/13:
Installation manual
6
Connections to
terminals
X14M
1 2 3 4 5 6
X14M
1 2 3 4 5 6
6 kW 6 kW 9 kW
1~ 230 V 3N~ 3N~
400 V 400 V
52.9Ω ∞ ∞
∞ 105.8Ω 105.8Ω
∞ 105.8Ω 105.8Ω
26.5Ω 105.8Ω 105.8Ω
26.5Ω ∞ ∞
∞ 52.9Ω 52.9Ω
∞ 52.9Ω 52.9Ω
52.9Ω 52.9Ω 52.9Ω
∞ ∞ ∞
K1M
1 3 5 13
2 4 6 14
Ω
Ω
K5M
1 3 5 13
2 4 6 14
4.4.3 To connect the backup heater kit to the
control box
1 For the thermistor, connect 2 wires between backup heater
terminals X15M/1+2 and control box terminals X2M/5+6.
2 For the thermal protector, connect 2 wires between backup
heater terminals X15M/3+4
X2M/11+12.
3 For the connection with the control box, connect 3 wires
between backup heater terminals X15M/5+6+7 and control box
terminals X2M/13+14+15.
F1B
1 2 3 4 5 6 7
X15M
4 Fix the cable with cable ties to the cable tie mountings.
INFORMATION
▪ For details about the connections, refer to the wiring
diagram.
▪ Use a multi-core cable.
▪ For backup heater kit EKMBUHCA3V3, it is NOT
required to make a connection between backup heater
terminal X15M/6 and control box terminal X2M/14.
5 Starting up the system
For instructions on how to configure and commission the system,
and hand it over to the user, refer to the installation manual of the
outdoor unit.
Daikin Altherma low temperature monobloc backup heater
K2M K2M
1 3 5 13
2 4 6 14
and control box terminals
X2M
A4P 15
14
13
12
11
6
5
X1M
X8M
EKMBUHCA3V3 + EKMBUHCA9W1
4P405547-1C – 2015.08