4. Capacity and selection data
TCGB0075 rev.0 - 11/2012
70
Procedure description
Follow the next selection procedure given in this chapter:
a.
System combination (outdoor unit + indoor unit) selection
i.
Without heating source (Mono-valent system)
ii.
With additional heating source (Mono-energy / Bivalent system)
b.
It will be selected the domestic hot water tank accessory (optional).
a.i) Mono-valent system (regular election)
In case of normal selection of Mono-valent system (without additional heating sources) the YUTAKI S80 will be selected
depending on the required heating load.
N O T E
The example given in this chapter is the regular election as the YUTAKI S80 has been performed to cover all the
heating requirements, even the coldest days of the year.
•
Step 1: Initial pre-selection
Proposed energy system
Mono-valent
Inlet/outlet water temperature
47/55 ºC
Ambient temperature WB/DB in the coldest
day of the year (HR = 85%)
-10/-9 ºC
Heating load required on the coldest day of
the year
13.0 kW
13.0 kW, -10 ºC WB
Capacity of
YUTAKI S80
Heating capacity
Outdoor ambient temperature
Heating load
demanded
Installation restrictions
Installation type
Radiant floor
Power supply
1~ 230V 50Hz
Indoor unit lower than outdoor unit
15 m
Equivalent piping length between outdoor
and indoor unit
20 m
These conditions will determine the entry in the maximum heating capacity tables (see section
Maximum heating capacity
tables
) where it is possible to identify which unit has the heating capacity to cover the required heating load on the coldest
day of the year by the installation (13.0 kW for an inlet/outlet water temperature of 47/55 ºC and an ambient temperature
of -10ºC WB).
YUTAKI S80
Maximum heating capacity (kW)
RAS-4H(V)RNME-AF + RWH-4.0FS(V)NFE
13.0
RAS-5H(V)RNME-AF + RWH-5.0FS(V)NFE
15.6
RAS-6H(V)RNME-AF + RWH-6.0FS(V)NFE
17.6
N O T E
Although the RAS-4HVRNME-AF + RWH-4.0FS(V)NFE combination has the same maximum heating capacity
than the heating load required, we must take the next combination cause this heating capacity will be lower after
applying the correction factors (step 2).