Mitsubishi Electric EHPT20Q-VM2EA Service Manual page 13

Local system
1-zone temperature control
Filling the System (Primary Circuit)
Note: Make sure to turn OFF the booster heater power supply before filling the
system
4
5
Always use a new filling loop with double check valve when filling the
primary circuit to avoid back flow contamination of water supply.
Do not use an old filling loop.
Do Not turn ON the system until the system is fully charged of water.
6
7
8
9
Filling the cylinder unit (Secondary (Potable) circuit)
Draining the cylinder unit
WARNING:DRAINED WATER MAY BE VERY HOT
GCH15010
1-zone temperature control (2-zone valve ON/OFF control)
Zone1
1
IMPORTANT<Air discharging of pump A>
Note: If the air is not sufficiently discharged, hot water is not supplied and an
18
13
2
4
3
on to
tap
error occurs. Continue to discharge the air until smooth delivery of hot
water.
5
0
-5
-10
-15
-20
-25
0 10
Anti-freeze concentration [%]
Zone1
1
Zone2
1
20 30 40 50