Operating instructions

73
Positions cylinder drain & fill valve
A
B
C
A
Drain & fill valve, cylinder, closed
B
Drain & fill valve, cylinder, open to
drain the internal DHW line
C
Drain & fill valve, cylinder, open to
drain or fill the cylinder
Draining the heat pump on the secondary side
1. Close on-site drain & fill valve. 2. Drain heat pump at secondary flow
drain valve (see page 71).
Checking sensors
For sensor connections to the controller
and sensor PCB, see page 127.
For the position of the sensors in the heat
pump, see figure on page 71.
Troubleshooting
Repairs
(cont.)
5441 603 GB
Service