Carrier 30RB012-9 - Service Instructions; Circulating Water Pump Flow Setting

15
30RB
$JSDVMBUJOHXBUFS1VNQ8BUFSøPXTFUUJOH 'JH
8BUFSMPPQDIBSHJOHTZTUFNDMFBOJOHBOE8BUFS$IBSBDUFSJTUJDT 'JH
&YQBOTJPOWFTTFM7PMVNFDBMDVMBUJPO
4FSWJDFJOTUSVDUJPOT
1VNQTIBWFBNBOVBMTQFFETFMFDUPSTQFFETFUUJOHT
which allow for adjustment of speed to match
the requirements of the system.
1VNQ4QFFE4FUUJOHQSPDFEVSF
The best speed setting will provide adequate circulation and
provide the correct ow and return temperature dierentials.
5IJTXJMMBDIJFWFNBYJNVNFDPOPNZBOEFóDJFODZ
1. Set the speed selector to minimum (one)
2. Set any room thermostatic controls to maximum
'JH
햲 Loosen 2 turns for proper venting
Charge the water loop, with water, until the pressure on the
IZESPVOJUSFBET.1BCBS
Water pump is forced on. Loosen the cap of the air purge
valve to purge air from the water circuit. If air remains in the
system the system will not operate correctly.
3. Start up system and pump should start
4. 8BJU_NJOTBOENFBTVSFXBUFSUFNQFSBUVSFEJòFSFOUJBM
(leaving water temperature-entering water temperature)
5. Water Temperature Dierential should be 5-6°C, if Water
delta temperature is more than 6°C select a higher
pump speed An alternative solution is measure water
QSFTTVSFEJòFSFOUJBMCFUXFFOVOJUXBUFS*/065QJQFT
and select pump speed to match the unit nominal water
ow (see unit available static pressure curves).
5IFJOTUBMMFSDBOWFSJGZJGUIFXBUFSöMMPQFSBUJOHJT
DPNQMFUFEXIFOøPXTXJUDITUBUVTJT0/UPMFUUIF
compressor start.
When completing the Test Run, during the commissioning of
the system, the water pressure in the system may drop below
1,5 bar. In this event please add more water to the system.
In the case of a new installation, or cleaning the circuit, it is
necessary to perform a preventive cleaning of the system.
An expansion vessel has to be added in the water loop with
30RB008X9 30RB012X9 30RB015X9.
5IFDBQBDJUZPGUIFJOUFSOBMFYQBOTJPOWFTTFMöUUFEJO
30RB008-9, 30RB012-9 30RB015-9 is 2 liters:
*GXBUFSMPPQDPOUFOUJTIJHIFSUIBOTQFDJöFEJOUIF
installation manual, an additional expansion vessel has to
be added.
The expansion volume can be calculated using the
following formula.
Where:
7 /FDFTTBSZUPUBMWFTTFMDBQBDJUZ-
Ⱦ 8BUFSFYQBOTJPODPFóDJFOUBUBWFSBHFIPUXBUFSUFNQFSBUVSF
Vs: Total water volume in the closed system (Do not include
Hot Water Cylinder)
1 4ZTUFNQSFTTVSFBUUBOLTFUUJOHQPTJUJPO.QB@BCT
1JQFJOOFSQSFTTVSFEVSJOHQVNQPQFSBUJPOCFGPSF
heating device operates = water supply pressure)
1 .BYJNVNQSFTTVSFVTFEEVSJOHPQFSBUJPOBUUBOLTFUUJOH
position (Mpa_abs*=safety valve setting pressure)
* The absolute pressure valve (abs.) is obtained by adding the
BUNPTQIFSJDQSFTTVSF.1BCBSUPUIFHBVHFQSFTTVSF
The initial pressure of this expansion Vessel is 0.1Mpa (1 bar).
The release pressure of the safety valve is 0.3Mpa (3 bar).
8BUFSUFNQFSBUVSFBOEFYQBOTJPODPFóDJFOUȾ
8BUFSUFNQFSBUVSF¡$ &YQBOTJPOSBUFȾ
0 0.0002
4 0.0000
5 0.0000
10 0.0003
15 0.0008
20 0.0017
25 0.0029
30 0.0043
35 0.0050
40 0.0078
45 0.0100
Example: Maximum water temperature 20°C, initial water charge 0.2MPa and system volume 200
litres. The calculated Vessel capacity is:
)1.03.0(
)1.02.0(
1
2000.0017
36.1


<
=

2
1
1
P
P
Vs
V
<
=

ε
English