Air Source Heat Pump Water Heater
18
connect the outfall to the floor drain, and ensure that the outfall pipe and the joint of
the floor drain are lower than the bottom of the water tank. Otherwise, the water
cannot be drained. In addition, the cut-off valve must be installed in the position
at which the user can conveniently operate it.
Cut-off valve A
Hot water output
Safety check
valve
Filter
Cut-off valve B
Tap water
Floor drain
Figure 7-5 Safety check valve and outfall pipe installation
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5
）
Installing freeze-proof bands
If the water tank is inevitably to be installed in a place where ambient
temperatures are below 0 °C, in order to avoid pipe freezing caused by
poor waterway thermal insulation, freeze-proof bands must be used and installed
around the water outlet and inlet pipes. For details about how to install freeze-proof
bands, refer to the freeze-proof band installation guide.
Caution
：
In order to ensure water safety, both the water inlet and outlet must be
connected to a PPR pipe for each to insulate electricity. The length L of the PPR
pipe is calculated by the following formula: L
≥ 70 x R
2
, of which L is the length of the
PPR pipe (unit: cm), and R is the inner radius (unit: cm) of the PPR pipe. In addition,
take thermal insulation measures, and do not directly use metal pipes.
To ensure safety and reliability, use dedicated accessories (PPR pipe joints,
safety check valves, and filters) delivered with the unit, and do not use accessories
from third-party vendors or replace any parts by the user.
C&H
shall not undertake
any responsibility for personal injuries, or any loss caused by improper running and
use of the air source water heater.