Table of Contents
6 About the units and options
5.2
Freeze protection
You must protect the system against freezing. This involves:
▪ Choosing between glycol and freeze protection valves
▪ Installing the bottom plate heater
5.2.1
Glycol or freeze protection valves
Frost can damage the system. To prevent the hydraulic components
from freezing, the software is equipped with special frost protection
functions, that include the activation of pump in case of low
temperatures.
However, in case of a power failure, these functions cannot
guarantee protection.
Do one of the following to protect the water circuit against freezing:
▪ Add glycol to the water. Glycol lowers the freezing point of the
water.
▪ Install freeze protection valves. Freeze protection valves drain the
water from the system before it can freeze.
NOTICE
If you add glycol to the water, do NOT install freeze
protection valves. Possible consequence: Glycol leaking
out of the freeze protection valves.
INFORMATION
For more information about glycol and freeze protection
valves, see
"9.6.5 To protect the water circuit against
freezing" on
page 37.
5.2.2
Bottom plate heater
To prevent freeze-up of the bottom plate you can install the optional
bottom plate heater. In certain circumstances this is required.
Bottom plate heater (EKBPHT04JH)
▪ Prevents freeze-up of the bottom plate.
▪ Required in areas with ambient temperature <–5°C and high
relative humidity for at least 3 consecutive days.
▪ For installation instructions, see the installation manual of the
bottom plate heater.
NOTICE
▪ If you install the bottom plate heater, you may lower the
operation range of the heat pump to Ta≥–14°C using
field setting [8-0E]=–14°C.
▪ If you do not install the bottom plate heater, keep
[8-0E]=–5°C.
6
About the units and options
6.1
Overview: About the units and
options
This chapter contains information about:
▪ Identifying the outdoor unit
▪ Identifying the gas boiler
▪ Combining outdoor unit and gas boiler
▪ Combining the outdoor unit with options
▪ Combining the gas boiler with options
Installer reference guide
12
6.2
Identification
NOTICE
When installing or servicing several units at the same time,
make sure NOT to switch the service panels between
different models.
6.2.1
Identification label: Outdoor unit
Location
Model identification
Example: EJ H A 04 AA V3
Code
EJ
Hybrid monobloc outdoor pair heating only
H
Low water temperature – ambient zone 3 (see
operation range)
A
Refrigerant R32
04
Capacity class
AA
Model series
V3
Power supply
6.2.2
Identification label: Gas boiler
Location
Model identification
Unit detail
******-yymm******
PIN
Explanation
Description
Product code-Serial No.
yy = year of production, mm =
month of production
Product Identification Number
Data related to domestic hot
water
Data related to space heating
EJHA04AAV3 + NHY2KOMB28+32AA
Daikin Altherma H Hybrid
4P556861-1A – 2019.05
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